THEREOF

FIELD

The disclosure relates to an insertion device and an insertion method thereof, and more particularly to an insertion device for a biosensor and an insertion method thereof.

BACKGROUND

A conventional insertion device disclosed in U.S. Patent No. 10413183 is for inserting a biosensor into a host, and includes a plunger, and a piercing member to which the sensor assembly is mounted.

The piercing member is inserted into the host upon depression of the plunger, but is not separated from the host until the plunger is released. Accordingly, the conventional insertion device is operated via a two-action operation. When an operator fails to promptly release the plunger, the piercing member remains to be inserted into the host and may cause discomfort of the host.

SUMMARY

Therefore, an object of the disclosure is to provide an insertion device that can alleviate the drawback of the prior art.

According to one aspect of the disclosure, the insertion device includes a cover body, an insertion module. The cover body has an accommodating space. The insertion module is disposed in the accommodating space, and includes a main body, an insertion seat, a first pre-compressed elastic member, a retraction seat, a second pre-compressed elastic member, a base and a sensor assembly. The main body is coupled to the cover body, and cooperates with the cover body to define a displacement space therebetween. The insertion seat is removably positioned in the cover body, and is able to move in the displacement space between the main body and the cover body. The first pre-compressed elastic member has two opposite ends that respectively abut against the insertion seat and the cover body. The retraction seat is removably positioned relative to the insertion seat. The second elastic member has two opposite ends that respectively abut against the insertion seat and the retraction seat. The base is separably positioned relative to the main body. The sensor assembly is to be separably mounted to the base. When the cover body is depressed, the insertion seat is driven by a restoring force of the first elastic member to perform an automatic-insertion operation and to collapse a limiting structure between the insertion seat and the cover body.After the automatic-insertion operation is done, the cover body is positioned relative to the main body without rebounding, and a limiting structure between the insertion seat and the retraction seat collapses upon the collapse of the limiting structure between the insertion seat and the cover body, so that the retraction seat is driven by a restoring force of the second elastic member to perform an automatic-retraction operation.

Another object of the disclosure is to provide an insertion method that can alleviate the drawback of the prior art.

According to one aspect of the disclosure, the insertion method includes: an insertion device including a displacement space that is cooperatively defined by a cover body and a main body; an insertion module disposed in the displacement space, the insertion module being movable in the displacement space by compressed first and second elastic members therein so as to perform an automatic-insertion operation and an automatic-retraction operation; an insertion limiting structure disposed between the insertion module and the main body for removably positioning the insertion module at a pre-insertion position; and a retraction limiting structure disposed between the insertion module and the cover body, the insertion module being able to move from a post-insertion position to the pre-insertion position when the retraction limiting structure is collapsed.

When the insertion device is kept being depressed, the insertion limiting structure is collapsed, and the insertion module is biased by a restoring force of the first elastic member to move downwardly to perform the automatic-insertion operation. The retraction limiting structure is collapsed immediately after the insertion module finishing the automatic-insertion operation, such that the insertion module is biased by a restoring force of the second elastic member to move upwardly to perform the automatic-retraction operation. The insertion module positions a sensor assembly thereof onto a base during the automatic-insertion operation. A time needed for performing the automatic-insertion operation and the automatic-retraction operation is no more than 100 milliseconds . According to another aspect of the disclosure, the insertion device includes a cover body, an insertion module. The cover body has an accommodating space. The insertion module is disposed in the accommodating space, and includes a main body, a main cover, an insertion seat, a pre-compressed first elastic member, a retraction seat, a pre-compressed second elastic member, a base and a sensor assembly. The main body is coupled to the main cover, and cooperates with the main cover to define a displacement space therebetween. The insertion seat is removably positioned in the main cover, and is able to move in the displacement space between the main body and the main cover. The pre-compressed first elastic member has two opposite ends that respectively abut against the insertion seat and the main cover. The retraction seat is removably positioned relative to the insertion seat. The pre-compressed second elastic member has two opposite ends that respectively abut against the insertion seat and the retraction seat. The base is separably positioned relative to the main body. The sensor assembly is to be separably mounted to the base. When the cover body is depressed, the insertion seat is driven by a restoring force of the pre-compressed first elastic member to perform an automatic-insertion operation and to collapse a limiting structure between the insertion seat and the main cover. After the automatic-insertion operation is done, the cover body is positioned relative to the main body without rebounding, and a limiting structure between the insertion seat and the retraction seat collapses upon the collapse of the limiting structure between the insertion seat and the main cover, so that the retraction seat is driven by a restoring force of the pre-compressed second elastic member to perform an automatic-retraction operation. The restoring force of the pre-compressed first elastic member is configured not to act on the cover body during depression of the cover body.

According to another aspect of the disclosure, the insertion method includes: an insertion device including a displacement space that is cooperati ely defined by a main cover and a main body; an insertion module disposed in the displacement space, the insertion module being movable in the displacement space by compressed first and second elastic members therein so as to perform an automatic-insertion operation and an automatic-retraction operation; an insertion limiting structure disposed between the insertion module and the main body for removably positioning the insertion module at a pre-insertion position; and a retraction limiting structure disposed between the insertion module and the main cover, the insertion module being able to move from a post-insertion position to the pre-insertion position when the retraction limiting structure is collapsed. When the insertion device is kept being depressed, the insertion limiting structure is collapsed, and the insertion module is biased by a restoring force of the first elastic member to move downwardly to perform the automatic-insertion operation. The retraction limiting structure is collapsed immediately after the insertion module finishing the automatic-insertion operation, such that the insertion module is biased by a restoring force of the second elastic member to move upwardly to perform the automatic-retraction operation. The insertion module positions a sensor assembly thereof onto a base during the automatic-insertion operation. A time needed for performing the automatic-insertion operation and the automatic-retraction operation is no more than 100 milliseconds, no more than 8 milliseconds, no more than 4 milliseconds or no more than 2 milliseconds.

According to another aspect of the disclosure, the insertion device includes a cover body, an insertion module. The cover body has an accommodating space. The insertion module is disposed in the accommodating space, and includes a main body, an insertion seat, a first pre-compressed elastic member, a retraction seat, an insertion needle, a second pre-compressed elastic member, a base and a sensor assembly. The main body is coupled to the cover body, and cooperates with the cover body to define a displacement space therebetween. The insertion seat is removably positioned in the cover body, and is able to move in the displacement space between the main body and the cover body. The first pre-compressed elastic member has two opposite ends that respectively abut against the insertion seat and the cover body. The retraction seat is removably positioned relative to the insertion seat. The insertion needle is connected to the retraction seat. The second elastic member has two opposite ends that respectively abut against the insertion seat and the retraction seat. The base is separably positioned relative to the main body. The sensor assembly is to be separably mounted to the base. When the cover body is depressed, the insertion seat is driven by a restoring force of the first elastic member to perform an automatic-insertion operation and to collapse a limiting structure between the insertion seat and the cover body.After the automatic-insertion operation is done, the cover body is positioned relative to the main body without rebounding, and a limiting structure between the insertion seat and the retraction seat collapses upon the collapse of the limiting structure between the insertion seat and the cover body, so that the retraction seat is driven by a restoring force of the second elastic member to perform an automatic-retraction operation. A time needed for performing the automatic-insertion operation and the automatic-retraction operation is no more than 100 milliseconds .

According to another aspect of the disclosure, the insertion device includes a cover body, an insertion module. The cover body has an accommodating space. The insertion module is disposed in the accommodating space, and includes a main body, a main cover, an insertion seat, a pre-compressed first elastic member, a retraction seat, an insertion needle, a pre-compressed second elastic member, a base and a sensor assembly. The main body is coupled to the main cover, and cooperates with the main cover to define a displacement space therebetween. The insertion seat is removably positioned in the main cover, and is able to move in the displacement space between the main body and the main cover.The pre-compressed first elasticmember has two opposite ends that respectively abut against the insertion seat and the main cover. The retraction seat is removably positioned relative to the insertion seat. The insertion needle is connected to the retraction seat. The pre-compressed second elastic member has two opposite ends that respectively abut against the insertion seat and the retraction seat. The base is separably positioned relative to the main body. The sensor assembly is to be separably mounted to the base. When the cover body is depressed, the insertion seat is driven by a restoring force of the pre-compressed first elastic member to perform an automatic-insertion operation and to collapse a limiting structure between the insertion seat and the main cover. After the automatic-insertion operation is done, the cover body is positioned relative to the main body without rebounding, and a limiting structure between the insertion seat and the retraction seat collapses upon the collapse of the limiting structure between the insertion seat and the main cover, so that the retraction seat is driven by a restoring force of the pre-compressed second elastic member to perform an automatic-retraction operation. A time needed for performing the automatic-insertion operation and the automatic-retraction operation is no more than 100 milliseconds. The restoring force of the pre-compressed first elastic member is configured not to act on the cover body during depression of the cover body .

According to another aspect of the disclosure, the insertion device includes an upper casing, an insertion module and lower casing. The upper casing includes an outer shell, and a cover body that is disposed in the outer shell.The cover body has an accommodating space. The insertion module is disposed in the accommodating space, forms movement relationship with the outer shell and the cover body of the upper casing, and includes a main body, an insertion seat, a first elastic member, a retraction seat, a second elastic member, a base and a sensor assembly. The main body assembly includes an upper portion, and a lower portion that cooperates with the upper portion to define a displacement space therebetween. The insertion seat is removably positioned in the upper portion, and is able to move in the displacement space between the lower portion and the upper portion. The first elastic member has two opposite ends that respectively abut against the insertion seat and the upper portion of the main body assembly. The retraction seat is removably positioned relative to the insertion seat. The second elastic member has two opposite ends that respectively abut against the insertion seat and the retraction seat.The base is separably positioned relative to the main body assembly. The sensor assembly is to be separably mounted to the base. The lower casing is separably connected to the upper casing. When the upper casing is depressed, the insertion seat is driven by a restoring force of the first elastic member to perform an automatic-insertion operation and to collapse a limiting structure between the insertion seat and the upper portion of the main body assembly. After the automatic-insertion operation is done, the upper casing is positioned relative to the main body without rebounding, and a limiting structure between the insertion seat and the retraction seat collapses upon the collapse of the limiting structure between the insertion seat and the upper portion of the main body assembly, so that the retraction seat is driven by a restoring force of the second elastic member to move upwardly to perform an automatic-retraction operation.

According to another aspect the disclosure, the insertion method includes: an upper casing including an outer shell, and a cover body that is disposed in the outer shell; an insertion device forming movement relationship with the outer shell and the cover body of the upper casing, and including a displacement space that is cooperatively defined by a main cover and a main body; an insertion module disposed in the displacement space, the insertion module being movable in the displacement space by pre-compressed first and second elastic members therein so as to perform an automatic-insertion operation and an automatic-retraction operation; an insertion limiting structure disposed between the insertion module and the main body for removably positioning the insertion module at a pre-insertion position; and a retraction limiting structure disposed between the insertion module and the main cover, the insertion module being able to move from a post-insertion position to the pre-insertion position when the retraction limiting structure is collapsed. When the insertion device is kept being depressed, the insertion limiting structure is collapsed, and the insertion module is biased by a restoring force of the first elastic member to move downwardly to perform the automatic-insertion operation. The retraction limiting structure is collapsed immediately after the insertion module finishing the automatic-insertion operation, such that the insertion module is biased by a restoring force of the second elastic member to move upwardly to perform the automatic-retraction operation. The insertion module positions a sensor assembly thereof onto a base during the automatic-insertion operation. A time needed for performing the automatic-insertion operation and the automatic-retraction operation is no more than 100 milliseconds.

According to another aspect of the disclosure, the insertion device includes an upper casing, a lower casing and an insertion module. The upper casing has a casing engaging structure at a lower portion thereof. The lower casing is separably connected to the upper casing. The lower casing has an abutment portion at an inner surrounding surface thereof that abuts against an outer side of the casing engaging structure of the upper casing. The insertion module is disposed in the upper casing, forms movement relationship with the upper casing, and includes a main body assembly. The main body assembly has a body engaging structure that abuts against an inner side of the casing engaging structure of the upper casing. When the lower casing is coupled to the upper casing, the abutment portion of the lower casing limits movement of the casing engaging structure of the upper casing, such that the upper casing cannot move downwardly so as to prevent unintentional insertion operation of the insertion device .

Another object of the disclosure is to provide a insertion module that can alleviate at least one of the drawbacks of the prior art.

According to the disclosure, the insertion module is adapted to to guide an insertion needle to move stably before inserting into a host, and includes a main body, an auxiliary insertion seat, an insertion needle assembly and a sensor assembly. The main body has an accommodating hole that extends along an axial line, and a plurality of slide grooves that are disposed on the accommodating hole around the axial line and communicate with the accommodating hole.The auxiliary insertion seat has a base portion, and a plurality of wing portions that are connected to the base portion. Each of the wing portions is reciprocated within a respective one of the slide grooves, and has a protruding portion. The insertion needle assembly includes a needle seat assembled with the base portion of the auxiliary insertion seat, and an insertion needle that is connected to the needle seat.A distance between a tip end of the insertion needle and a skin surface of the host is defined as an initial stroke distance. The sensor assembly includes a sensing seat, and a sensor that is held within the sensing seat. The sensing seat is assembled with the base portion of the auxiliary insertion seat. The insertion needle is inserted through the sensing seat to cover the sensor. Each of the slide grooves has a wall surface. The protruding portion of each of the wing portions resiliently abuts against the wall surface of a respective one of the slide grooves in point-contact such that the auxiliary insertion seat is fixed before inserting into the host through the inteference between the protruding portions and the wall surfaces to provide a stable inserting and prevent the insertion needle from oblique in said initial stroke distance.

According to another aspect of the disclosure, the insertion device includes an actuation module and an insert ion module.The actuation module includes a cover body, a main cover received in the cover body, an insertion seat connected to the main cover, a first elastic member abutting against the main cover and the insertion seat, a retraction seat disposed between the main cover and the insertion seat, and a second elastic member abutting against the retraction seat and the insertion seat. The insertion module includes a main body, an auxiliary insertion seat, an insertion needle assembly and a sensor assembly. The main body has an accommodating hole that extends along an axial line, and a plurality of slide grooves disposed on the accommodating hole around the axial line and communicating with the accommodating hole. The auxiliary insertion seat has a base portion, and a plurality of wing portions that are connected to the base portion.Each of the wing portions is reciprocated within a respective one of the slide grooves, and has a protruding portion. The insertion needle assembly includes a needle seat assembled with the base portion of the auxiliary insertion seat, and an insertion needle connected to the needle seat.A distance between a tip end of the insertion needle and a skin surface of a host is defined as an initial stroke distance. The sensor assembly includes a sensing seat, and a sensor held within the sensing seat. The sensing seat is assembled with the seat body of the auxiliary insertion seat, and the insertion needle is inserted through the sensing seat to cover the sensor. Each of the slide grooves has a wall surface. The protruding portion of each of the wing portions resiliently abuts against the wall surface of a respective one of the slide grooves in point-contact such that the auxiliary insertion seat is fixed before inserting into the host through the interference between the protruding portions and the wall surfaces to provide a stable inserting and prevent the insertion needle from oblique in the initial stroke distance.

BRIEF DESCRIPTION OF THE DRAWINGS Other features and advantages of the disclosure will become apparent in the following detailed description of the embodiments with reference to the accompanying drawings, of which:

Figure 1 is an exploded perspective view illustrating a first embodiment of the insertion device according to the disclosure;

Figure 2 is another exploded perspective view illustrating the first embodiment;

Figure 3 is a sectional view illustrating of first embodiment, illustrating a sensor of a container in a state to be implanted;

Figure 4 is a sectional view taken along line IV-IV in Figure 3;

Figure 5 is a sectional view illustrating a lower casing of the first embodiment uncovering a base;

Figure 6 is a sectional view taken along line VI-VI in Figure 5;

Figure 7 is a sectional view illustrating an upper casing of the first embodiment being depressed;

Figure 8 is a sectional view taken along line VIII-VIII in Figure 7;

Figure 9 is a sectional view illustrating an insertion seat of the first embodiment being moved toward a host;

Figure 10 is a sectional view taken along line X-X in Figure 9;

Figure 11 is a sectional view illustrating a retraction seat of the first embodiment being moved away from the host;

Figure 12 is a sectional view taken along line XII-XII in Figure 11;

Figure 13 is a sectional view illustrating an auxiliary insertion seat of the first embodiment being separated from a sensor assembly; Figure 14 is a sectional view taken along line XIV-XIV in Figure 13;

Figure 15 is a sectional view illustrating the lower casing being re-coupled to the upper casing;

Figure 16 is a sectional view taken along line XVI-XVI in Figure 15;

Figure 17 is a perspective view illustrating a modification of the insertion device;

Figure 18 is a sectional view of the modification shown in Fig. 17, illustrating a stage of being prepared for the implanting;

Figure 19 is a sectional view taken along line XIX-XIX in Figure 18;

Figure 20 is another sectional view of the modification, illustrating an instance during the implanting;

Figure 21 is a sectional view taken along line XXI-XXI in Figure 20;

Figure 22 is a schematic views illustrating a second embodiment of the insertion device according to the disclosure being assembled;

Figure 23 is a schematic view illustrating a lower casing of the second embodiment uncovering a base;

Figure 24 is a schematic view illustrating operation of an insertion module;

Figure 25 is a schematic view illustrating the lower casing covering the base; Figure 26 is a schematic view illustrating the lower casing tearing a release layer via a tearing element when the lower casing uncovers the base;

Figure 27 is a flow chart of an insertion operation of the insertion device according to the disclosure;

Figure 28 is a sectional view illustrating a sensor assembly being mounted onto a base;

Figure 29 is a partly sectional view illustrating the sensor assembly being connected to an auxiliary insertion seat;

Figure 30 is another exploded perspective view of the insertion device;

Figure 31 is a sectional view illustrating a third embodiment of the insertion device according to the disclosure;

Figure 32 is an enlarged sectional view of the third embodiment ;

Figure 33 is a sectional view illustrating a fourth embodiment of the insertion device according to the disclosure;

Figure 34 is a bottom exploded perspective view illustrating of the insertion module according to any of the four embodiments;

Figure 35 is a schematic view illustrating an insertion operation of an auxiliary insertion seat;

Figure 36 is a sectional view illustrating a modification of the wing portion of Figure 34; and Figure 37 is a sectional view illustrating another modification of the wing portion of Figure 34.

DE TAILED DESCRIPTION

Before the disclosure is described in greater detail, it should be noted that where considered appropriate, reference numerals or terminal portions of reference numerals have been repeated among the figures to indicate corresponding or analogous elements, which may optionally have similar characteristics. Referring to Figures 1 to 4, a first embodiment of the insertion device according to the disclosure is for inserting a sensor into a host. The insertion device may be in the form of a canister (e.g., a desiccant canister), but is not limited to such. The insertion device includes an upper casing 10 and an insertion module 30.

The upper casing 10 has an accommodating space 14 (see Figure 4), and a pair of casing engaging structures 124 (see Figure 4). The insertion module 30 is disposed in the accommodating space 14, and includes a main body assembly 300, an insertion seat 33, a first elastic member 34, a retraction seat 35, a second elastic member 37, a base 50 and a sensor assembly 70. With particular reference to Figures 3 and 4, the main body assembly 300 includes an upper portion 302, and a lower portion 303 that cooperates with the upper portion 302 to define a displacement space 301 therebetween. The lower portion 303 of the main body assembly 300 has a pair of body engaging structures 315 that abut against inner sides of the casing engaging structures 124 of the upper casing 10, and that are able to respectively engage the casing engaging structures 124 of the upper casing 10 when the upper casing 10 is depressed downwardly.

The insertion seat 33 is removably positioned in the upper portion 302 of the main body assembly 300, and is able to move in the displacement space 301 between the upper portion 302 and the lower portion 303 along an axial line (L).

The upper casing 10 has a pair of urging portions 123 (see Figure 4). The lower portion 303 of the main body assembly 300 has a pair of stopping portions 317 (see Figure 4). The insertion seat 33 has a pair of buckle portions 335 (see Figure 4) that respectively and separably abut against the stopping portions 317 of the lower portion 303 of the main body assembly 300 so as to position the insertion seat 33 relative to the main body assembly 300, and that are able to be respectively pushed by the urging portions 123 of the upper casing 10 to be respectively separated from the stopping portions 317 of the lower portion 303 of the main body assembly 300. The buckle portions 335 of the insertion seat 33 respectively and separably abut the stopping portions 317 of the lower portion 303 of the main body assembly 300 so as to form an insertion limiting structure (A) (see Figure 4).

The insertion seat 33 further has at least one limiting groove 330 (see Figure 4). The upper portion 302 of the main body assembly 300 has at least one limiting member 323 (see Figure 4) that removably engages with the limiting groove 330 of the insertion seat 33. The insertion seat 33 further has at least one retraction positioning portion 334 that separably abuts against the limiting member 323 of the upper portion 302 of the main body assembly 300.

The first elastic member 34 has two opposite ends respectively abutting against the insertion seat 33 and the upper portion 302 of the main body assembly 300.

In this embodiment, the first elastic member 34 may be configured as a pre-compressed spring.

The retraction seat 35 is mounted with an insertion needle 36, and is removably positioned relative to the insertion seat 33. Specifically, the retraction positioning portion 334 of the insertion seat 33 is removably limited by the limiting member 323 of the upper portion 302 of the main body assembly 300, so as to form a retraction limiting structure (B) (see Figure 4) that positions the retraction seat 35 relative to the insertion seat 33.

The second elastic member 37 has two opposite ends respectively abutting against the insertion seat 33 and the retraction seat 35. In this embodiment, the second elastic member 37 may be configured as a pre-compressed spring . The base 50 is separably positioned relative to the lower portion 303 of the main body assembly 300, and includes a base seat 51, and an adhesive pad 52 that is fixedly connected to the base seat 51. In one embodiment, the base 50 may further include a release layer 55 (see Figures 31 and 33) that is separably adhered to the adhesive pad 52.

The insertion module 30 further includes an auxiliary insertion seat 38 that is separably mounted to the insertion needle 36 for stabilizing the initial stroke of the insertion. The sensor assembly 70 is separably mounted to the auxiliary insertion seat 38. The auxiliary insertion seat 38 has a base portion 381, three angularly spaced-apart wing portions 382 each extending radially outwardly from the base portion 381, and a plurality of coupling portions 383 (see Figure 3) that protrude from a bottom surface of the base portion 381. Each of the wing portions 382 has a plurality of notches 384, such that the wing portion 382 is flexible in a radial direction of the auxiliary insertion seat 38.

Referring to Figures 3 and 4, after first embodiment of the insertion device is assembled, the upper portion 302 and the lower portion 303 of the main body assembly 300 are interconnected, a top portion of the upper casing 10 and a top portion of the upper portion 302 of the main body assembly 300 are spaced apart from each other by a distance (D) (see Figure 3), the buckle portions 335 of the insertion seat 33 respectively abut against the stopping portions 317 of the lower portion

303 of the main body assembly 300 so as to position the insertion seat 33 at a pre-insertion position, the first elastic member 34 is pre-compressed between the insertion seat 33 and the upper portion 302 of the main body assembly 300 to generate a restoring force, the second elastic member 37 is pre-compressed between the retraction seat 35 and the insertion seat 33 to generate a restoring force, the retraction seat 35 is at a pre-insertion position, the coupling portions 383 of the auxiliary insertion seat 38 is fitted into the coupling portion 711 of the sensing seat 71 so that the sensing seat 71 and the auxiliary insertion seat 38 are interconnected, the auxiliary insertion seat 38 is connected to a needle seat 361 of the insertion needle 36 so that the insertion needle 36 is retained in the lower portion 303 of the main body assembly 300 and is shielded by the base 50, and the base 50 is positioned relative to the lower portion 303 of the main body assembly 300.

The insertion operation performed by the first embodiment (to insert the sensor 72 into the host) is illustrated as follows:

Referring to Figures 5 and 6, the adhesive pad 52 is adhered to a skin surface of the host. Referring to Figures 7 and 8, when the upper casing 10 is not depressed, the insertion limiting structure (A) that is formed between the buckle portions 335 of the insertion seat 33 and the stopping portions 317 of the lower portion 303 of the main body assembly 300 maintains the insertion seat 33 at the pre-insertion position. When the upper casing 10 is depressed toward the skin surface, the buckle portions 335 of the insertion seat 33 are respectively pushed by the urging portions 123 of the upper casing 10 to be deformed inwardly and to be respectively separated from the stopping portions 317 of the lower portion 303 of the main body assembly 300, so that the insertion limiting structure (A) is collapsed. At the same time, the body engaging structures 315 of the main body assembly 300 respectively engage the casing engaging structure 124 of the upper casing 10, so that the upper casing 10 is positioned relative to the main body assembly 300. After the cover body 12 being pressed by the user, the actuating portions 123 (i.e., the urging portions 123) will be stuck underneath the main body 31, and thus the cover body 12 cannot be moved upward while the user does not feel any vibration nor noise Referring to Figures 9 and 10, after the insertion limiting structure (A) is collapsed, the restoring force of the first elastic member 34 is permitted to be released, and moves the insertion seat 33 to an insertion position to implement automatic-insertion, such that the sensor assembly 70 is moved by the insertion seat 33 to a post-insertion position, that a portion of the sensor 72 is inserted underneath the skin surface, and that the sensing seat 71 is positioned onto the mounting portion 500 of the base 50.After the sensor 72 is inserted underneath the skin surface, the limiting member 323 of the upper portion 302 of the main body assembly 300 is separated from the limiting groove 330 and the retraction positioning portion 334 of the insertion seat 33, so that the retraction positioning portion 334 is permitted to be deformed outwardly to collapse the retraction limiting structure (B).As such, the restoring force of the second elastic member 37 is permitted to be released, and drives the retraction seat 35 to move past the retraction positioning portion 334 of the insertion seat 33 away from the skin surface, such that the insertion needle 36 is separated from the auxiliary insertion seat 38 and is retracted into the insertion seat 33 to hide a needle 362 thereof and to implement automatic-retraction (see Figures 11 and 12). At this time, the coupling portions 383 of the auxiliary insertion seat 38 is maintained to be fitted into the coupling portion 711 of the sensing seat 71 so that the auxiliary insertion seat 38 is connected to the sensing seat 71 of the sensor assembly 70.

Afterward, the upper casing 10 and the insertion module 30 are separated from the base 50 and the skin surface of the host (the auxiliary insertion seat 38 is separated from the sensing seat 71 of the sensor assembly 70), so as to finish the insertion operation of the first embodiment of the insertion device including the automatic-insertion and automatic-retraction operations (see Figures 13, 14 and 28).

Accordingly, the first embodiment of the insertion device according to the disclosure is operated via a single-action operation. When the upper casing 10 is depressed, the insertion seat 33 is driven by the compressed first elastic member 34 to move toward the skin surface so as to perform the automatic-insertion operation and to separate the limiting structures (i.e., the limiting groove 330 and the limiting member 323) between the insertion seat 33 and the upper portion 302 of the main body assembly 300. After the automatic-insertion operation is done, the upper casing 10 is positioned relative to the main body assembly 300 without rebounding, and the limiting structures between the insertion seat 33 and the upper portion 302 are separated from each other, so that the retraction seat 35 is driven by the pre-compressed second elastic member 37 to perform the automatic-retraction operation. In this embodiment, a time needed for performing the automatic-insertion operation and the automatic-retraction operation is no more than 100 milliseconds. In other words, during the insertion operation of the first embodiment, the duration for which the insertion needle 36 is inserted into the host is no more than 100 milliseconds. In other embodiments, the duration may be no more than 50 milliseconds, no more than 8 milliseconds, no more than 6 milliseconds, no more than 4 milliseconds or no more than 2 milliseconds.

Referring back to Figures 1 to 4, a modification of the first embodiment of the insertion device according to the disclosure is for inserting a sensor into a host. The modification may also be in the form of a canister (e.g., a desiccant canister), but is not limited to such .

The modification of the insertion device includes an upper casing 10, a lower casing 20, an insertion module 30, a base 50 and a desiccant 60.

The upper casing 10 includes an outer shell 11, and a cover body 12 that is disposed in the outer shell 11. The cover body 12 has at least one casing engaging structure 124 at a lower portion thereof. The outer casing 11 has an annular protruding portion 115 and an upper positioning portion 116.

The lower casing 20 is separably and airtightly connected to the upper casing 10 so as to form an airtight space 200 (see Figure 4) therebetween. The desiccant 60 is disposed in the airtight space 200.

In this modification, the upper casing 10 and the lower casing 20 are interconnected in a hard-interference manner, but are not limited to such. The lower casing 20 has a top edge 233. The top edge 233 of the lower casing 20 is provided with a lower positioning portion 227 that corresponds in position and shape to the upper positioning portion 116 of the upper casing 10. The lower casing 20 further has at least one abutment portion 228 at an inner surrounding surface thereof that abuts against an outer side of the casing engaging structure 124 of the upper casing 10, and an annular groove 224 at the inner surrounding surface thereof that permits the annular protruding portion 115 of the upper casing 10 to engage therewith so as to interconnect the upper casing 10 and the lower casing 20 .

In this modification, the insertion device may further include a sealing ring 13 (see Figures 3 and 4) that is disposed between the annular protruding portion 115 of the upper casing 10 and the annular groove 224 of the lower casing 20 for enhancing air-tightness of the airtight space 200 defined between the upper casing 10 and the lower casing 20.

The insertion module 30 is disposed in the upper casing 10, and is able to be moved by the upper casing 10. The insertion module 30 includes a main body assembly 300.The main body assembly 300 includes a main body 31, and a main cover 32 that is connected to the main body 31 and that cooperates with the main body 31 to define a displacement space 301 therebetween. The main body assembly 300 further has at least one body engaging structure 315 that abuts against an inner side of the casing engaging structure 124 of the upper casing 10. The body engaging structure 315 engages with the casing engaging structure 124 of the upper casing 10 when the upper casing 10 is depressed. In this modification, the body engaging structure

315 of the main body assembly 300 is disposed on the main body 31 of the main body assembly 300, and the body engaging structure 315 abuts against the inner side of the casing engaging structure 124 of the cover body 12 of the upper casing 10.When the lower casing 20 engages the upper casing 10, the abutment portion 228 of the lower casing 20 limits movement of the casing engaging structure 124 of the cover body 12 of the upper casing 10, such that the upper casing 10 cannot move downwardly so as to prevent unintentional insertion operation of the insertion device due to unintentionally applying force to the insertion device. The insertion module 30 further includes an insertion seat 33 that is disposed in the displacement space 301, a first elastic member 34 that has two opposite ends respectively abutting against the insertion seat 33 and the main cover 32 for moving the insertion seat 33 in an insertion direction (F), a retraction seat 35 that is disposed in the insertion seat 33, an insertion needle 36 that is connected to the retraction seat 35, a second elastic member 37 that has two opposite ends respectively abutting against the insertion seat 33 and the retraction seat 35 for moving the retraction seat 35 in a retraction direction (R) opposite to the insertion direction (F), an auxiliary insertion seat 38 that is separably connected to the insertion needle 36, and a sensor assembly 70 that is separably connected to the auxiliary insertion seat 38. The sensor assembly 70 includes a sensing seat 71, and a sensor 72 that is mounted to the sensing seat 71 and that is separably coupled to the insertion needle 36. In this modification, the first elastic member 34 and the second elastic 37 are configured as pre-compressed springs.

The cover body 12 of the upper casing 10 has a pair of urging portions 123 at an inner surrounding surface thereof. The insertion seat 33 has a pair of buckle portions 335 (see Figure 4) that respectively and separably abut against two stopping portions 317 of the main body 31, and that are able to be respectively pushed by the urging portions 123 of the cover body 12 to be respectively separated from the stopping portions 317 of the main body 31. The buckle portions 335 of the insertion seat 33 respectively and separably abut the stopping portions 317 of the main body 31 so as to form an insertion limiting structure (A) between the insertion seat 33 and the main body 31.

The insertion seat 33 further has at least one limiting groove 330. The main cover 32 has at least one limiting member 323 that removably engages with the limiting groove 330 of the insertion seat 33. The insertion seat 33 further has at least one retraction positioning portion 334 that separably abuts against the limiting member 323 of the main cover 32 and that limits movements of the retraction seat 35. The retraction positioning portion 334 of the insertion seat 33 is limited by the limiting member 323 of the main cover 32, so as to form a retraction limiting structure (B) among the retraction seat 35, the insertion seat 33 and the main cover 32 of the main body assembly 300.

In this embodiment, the sensor assembly 70 is to be separably mounted to the base 50, and includes a sensing seat 71, and a sensor 72 that is mounted to the sensing seat 71 and that is separably coupled to the insertion needle 36. The sensing seat 71 has a coupling portion 711 (see Figure 3).

The base 50 is separably positioned relative to the main body 32 of the main body assembly 300, and permits the sensor assembly 70 to be mounted thereon after the sensor assembly 70 is separated from the auxiliary insertion seat 38. The base 50 includes a base seat 51, an adhesive pad 52 that is fixedly connected to the base seat 51, and two base hook structures 54 (see Figure 3) . In one embodiment, the base 50 may further include a release layer 55 (see Figures 31 and 33) that is separably adhered to the adhesive pad 52. The base 50 further has a mounting portion 500 (see Figure 4) for the sensor assembly 70 to be separably mounted thereto. In this modification, the mounting portion 500 of the base 50 includes a recess 501 that permits the sensor assembly 70 to be press-fitted thereinto, or may include an adhesive layer 502 (e.g., double-sided tape) that is disposed in the recess 501 (see Figure 31), or at least one resilient hook 503 (see Figure 32) that is for engaging with the sensor assembly 70.

In this modification, the insertion device further includes a pair of fixing members 40.The fixing members 40 are mounted to a slide groove 310 (see Figure 2) of the main body 31 of the main body assembly 300. Each of the fixing members 40 has a push portion 41 that corresponds in position to a respective one of two stop portions 226 (see Figure 3) of the lower casing 20, a support portion 42 that is opposite to the push portion 41, a fixing hook structure 43 that is located between the push portion 41 and the support portion 42, and a cam portion 44 that is located between the push portion 41 and the support portion 42 and that has an inclined cam surface 441.

The push portion 41 of each of the fixing members 40 is limited by the respective one of the stop portions 226 of the lower casing 20, so that the fixing members 40 are positioned relative to the main body 31. The sensing seat 71 of the sensor assembly 70 is supported by the support portions 42 of the fixing members 40 so as to be positioned relative to the main body 31. The fixing hook structures 43 of the fixing members 40 respectively engage with the base hook structures 54 of the base 50.

With reference to Figures 3 and 4, before the lower casing 20 is separated from the upper casing 10, the fixing members 40 interfere with the lower casing 20 and the cover body 12 of the upper casing 10, so that the upper casing 10 is prevented from moving downwardly by the fixing members 40 to further prevent unintentional insertion operation of the insertion device . Since the sensor assembly 70 has a lower end supported by the fixing members 40, and since the fixing members 40 engage with the base 50, the base 50 is limited within the insertion device. When the lower casing 20 is separated from the upper casing 10 (or uncovers the base 50 while being connected to the upper casing 10, in a modification), the upper casing 10 is permitted to be depressed, such that the cover body 12 moves downwardly to push and move the fixing member 40 laterally and outwardly so as to collapse the limiting structure among the fixing members 40, the sensor assembly 70 and the base 50.As such, the first elastic member 34 of the insertion module 30 is permitted to release the restoring force thereof to insert the insertion needle 36 and the sensor 72 of the sensor assembly 70 underneath the skin surface of the host, and the second elastic member 37 of the insertion module 30 is permitted to release the restoring force thereof to retract the insertion needle 36 to finish automatic-insertion and automatic-retraction operations .

Referring to Figures 3, 4, and 22 to 26 (Figures 22 to 26 are schematic views), a second embodiment, or a modification of the first embodiment of the insertion device according to the disclosure, is for inserting a sensor into a host. The outer shell 11 and the lower casing 20 (or the upper casing 20 and the lower casing 20) are airtightly coupled to each other, so that an inner space of the insertion device is airtight. The desiccant 60 may be disposed at a suitable position anywhere in the inner space of the insertion device. In another modification, any one of the components of the insertion module 30 may be made of materials including desiccant through an injection molding technology (as shown in Figs. 22 and 23). In still another modification, an inner surface of the outer shell 11 may be provided with a desiccant layer 62 (see Figures 25 and 26), or the sensor assembly 70 may have a desiccant 60 (not shown) so that the inner space of the insertion device is kept dry and that the sensor assembly 70 is prevented from being moistened.

Referring further to Figures 25 and 26, the base 50 further includes a tearing element 23 that is fixedly mounted to a base plate 21 of the lower casing 20. The tearing element 23 is connected to the release layer 55 (see Figures 31 and 33) that is separably adhered to the adhesive pad 52. When the lower casing 20 is separated from the upper casing 10 (or uncovers the base 50 while being connected to the upper casing 10), the tearing element 23 simultaneously separates the release layer 55 from the adhesive pad 52. Since the release layer 55 is not separated from the adhesive pad 52 until the insertion device is to perform the insertion operation, the adhesive pad 52 is prevented from being stained before the insertion operation. In this embodiment, the lower casing 20 is in the form of a cap. In other embodiments, the lower casing 20 may be in the form of an aluminum foil (not shown).

Referring to Figures 3 and 4, the outer shell 11 is sleeved onto the insertion module 30 after the components of the insertion module 30 are assembled. At this time, the sensor assembly 70 has been mounted to the insertion module 30 via the auxiliary insertion seat 38 (see Figure 29), the lower casing 20 is subsequently coupled to the outer shell 11. The sensor assembly 70 does not need to be manually adjusted during the insertion operation of the insertion device. It means that a user does not require additional manual operation of grasping the sensor assembly 70 onto the base 50 by the implanting module 30 (i.e., the insertion module 30). In this embodiment, all the components of the insertion device have been assembled in the factory, but can be disassembled and reassembled by medical personnel or a user (see Figure 30).When the insertion device is used to perform the insertion operation, the user can easily manipulate the insertion device (e.g., by simply depressing the upper casing 10) to mount the base 50 onto the skin surface of the host by the adhesive pad 52 of the base 50 followed by coupling the sensor assembly 70 onto the base 50.

Referring to Figures 15 and 16, the separated lower casing 20 can be re-coupled to the upper casing 10. The lower casing 20 can seal a bottom portion of the outer shell 11 by the engagement between the annular protruding portion 115 of the upper casing 10 and the annular groove 224 of the lower casing 20.When the lower casing 20 is re-coupled to the outer shell 11 of the upper casing 10, the engagement between the lower positioning portion 227 of the lower casing 20 and the upper positioning portion 116 of the upper casing 10 ensures that the lower casing 20 and the upper casing 10 are properly positioned to each other. In addition, the inner space of the insertion device can serve as a waste storing space. A used base 50 can be removed from the host and be placed in the inner space of the insertion device, such that the used insertion device can be disposed in compliance with standard of discard of medical waste. The whole insertion operation of the insertion device according to the disclosure is shown in Figure 27.

Figs. 28 shows that after the sensor 72 is implanted under the skin surface P of the living body, the sensor assembly 70 and the base 50 that are simultaneously disposed on the skin surface P of the living body, a transmitter 90 is installed on the base 50 in the form of an upper cover to process the physiological signals measured by the sensor 72 and allows the signals to be transmitted to the outside. In order to reduce the number of components to be implanted during the implantation process and also reduce the loading of the container, the inserter device of the present invention does not include a transmitter. The separately arranged the transmitter 90 and the sensor assembly 70 are to ensure the electronic parts are not damaged by the sterilization process, so the production yield of the device can be improved.

Referring to Figures 31 and 32, a third embodiment of the insertion device (similar to the automatic needle insertion and automatic needle extraction of the first embodiment, but in this embodiment does not include the outer shell 11) can optionally have a bottom cover 20, or uses a sealed package to seal the insertion device. The insertion device includes a cover body 12 and an insertion module 30.

The cover body 12 has an accommodating space 14, and a pair of casing engaging structures 124.

The insertion module 30 is disposed in the accommodating space 14, and includes a main body 31, an insertion seat 33, a first elastic member 34, a retraction seat 35, a second elastic member 37, a base 50 and a sensor assembly 70.

The main body 31 is associated with the cover body 12, and cooperates with the cover body 12 to define a displacement space 301 therebetween. The main body 31 has a pair of body engaging structures 315 that are able to respectively engage the casing engaging structure 124 of the cover body 12.

The insertion seat 33 is removably positioned in the cover body 12, and is able to move in the displacement space 301 between the main body 31 and the cover body 12 along an axial line (L).

The cover body 12 has a pair of urging portions 123 on an inner surrounding surface thereof. The main body 31 has a pair of stopping portions 317. The insertion seat 33 has a pair of buckle portions 335 that respectively and separably abut against the stopping portions 317 of the main body 31 so as to position the insertion seat 33 relative to the main body 31, and that are able to be respectively pushed by the urging portions 123 of the cover body 12 to be respectively separated from the stopping portions 317 of the main body 31. The buckle portions 335 of the insertion seat 33 respectively and separably abut the stopping portions 317 of the main body 31 so as to form an insertion limiting structure (A2) between the insertion seat 33 and the main body 31.

The insertion seat 33 further has at least one limiting groove 330. The cover body 12 further has at least one limiting member 100 that removably engages with the limiting groove 330 of the insertion seat 33. The insertion seat 33 further has at least one retraction positioning portion 334 that separably abuts against the limiting member 100 of the cover body 12 .

The first elastic member 34 has two opposite ends respectively abutting against the insertion seat 33 and the cover body 12. In this embodiment, the first elastic member 34 may be configured as a pre-compressed spring.

The retraction seat 35 is mounted with an insertion needle 36, and is removably positioned relative to the insertion seat 33. The retraction positioning portion 334 of the insertion seat 33 is removably limited by the limiting member 100 of the cover body 12, so as to form a retraction limiting structure (B2) that positions the retraction seat 35 relative to the insertion seat 33.

The second elastic member 37 has two opposite ends respectively abutting against the insertion seat 33 and the retraction seat 35. In this embodiment, the second elastic member 37 may be configured as a pre-compressed spring .

The base 50 is separably positioned relative to the main body 31, and includes a base seat 51, and an adhesive pad 52 that is fixedly connected to the base seat 51.

The sensor assembly 70 is to be separably mounted to the base 50, and includes a sensing seat 71, and a sensor 72 that is mounted to the sensing seat 71 and that is separably coupled to the insertion needle 36. The base 50 further has a mounting portion 500 for the sensor assembly 70 to be separably mounted thereto, and the mounting methods are similar as those described in the previous embodiment. The insertion module 30 further includes an auxiliary insertion seat 38 that is separably mounted to the insertion needle 36. The sensor assembly 70 is separably mounted to the auxiliary insertion seat 38. The auxiliary insertion seat 38 slidably engages with the main body assembly 300 to guide the insertion needle 36 to steadily insert the sensor 72 into the host without runout or inclination so as to alleviate pain of the host.

Referring to Figure 33, a fourth embodiment of the insertion device according to the disclosure (similar to the third embodiment but the insertion module includes independent main cover) includes a cover body 12 and an insertion module 30.

The cover body 12 has an accommodating space 14, and a pair of casing engaging structures 124.

The insertion module 30 is disposed in the accommodating space 14, and includes a main body 31, a main cover 32, an insertion seat 33, a first elastic member 34, a retraction seat 35, a second elastic member 37, a base 50 and a sensor assembly 70.

The main body 31 is connected to the main cover 32, and cooperates with the main cover 32 to define a displacement space 301 therebetween. The main body 31 has a pair of body engaging structures 315 that are able to respectively engage the casing engaging structure 124 of the cover body 12. A top portion of the cover body 12 and a top portion of the main cover 32 is spaced apart from each other by a distance (D).

The insertion seat 33 is removably positioned in the main cover 32, and is able to move in the displacement space 301 between the main body 31 and the main cover 32 along an axial line (L). The cover body 12 has a pair of urging portions 123 on an inner surrounding surface thereof. The main body 31has a pair of stopping portions 317. The insertion seat 33 has a pair of buckle portions 335 that respectively and separably abut against the stopping portions 317 of the main body 31 so as to position the insertion seat 33 relative to the main body 31, and that are able to be respectively pushed by the urging portions 123 of the cover body 12 to be respectively separated from the stopping portions 317 of the main body 31. The buckle portions 335 of the insertion seat 33 respectively and separably abut the stopping portions 317 of the main body 31 so as to form an insertion limiting structure (Al) between the insertion seat 33 and the main body 31.

The insertion seat 33 further has at least one limiting groove 330. The main cover 32 further has at least one limiting member 320 that removably engages with the limiting groove 330 of the insertion seat 33. The insertion seat 33 further has at least one retraction positioning portion 334 that separably abuts against the limiting member 320 of the main cover 32 .

The first elastic member 34 has two opposite ends respectively abutting against the insertion seat 33 and the main cover 32. In this embodiment, the first elastic member 34 may be configured as a pre-compressed spring.

The retraction seat 35 is mounted with an insertion needle 36, and is removably positioned relative to the insertion seat 33. The retraction positioning portion 334 of the insertion seat 33 is removably limited by the limiting member 320 of the main cover 32, so as to form a retraction limiting structure (Bl) that positions the retraction seat 35 relative to the insertion seat 33.

The second elastic member 37 has two opposite ends respectively abutting against the insertion seat 33 and the retraction seat 35. In this embodiment, the second elastic member 37 may be configured as a pre-compressed spring .

To sum up the abovementioned, the cover body 12, the main cover 32, the insertion seat 33, the first elastic member 34, the retraction seat 35, and the second elastic member 37 are corporately to define an actuation module for activating the insertion.

The base 50 is separably positioned relative to the main body 31, and includes a base seat 51, and an adhesive pad 52 that is fixedly connected to the base seat 51. The sensor assembly 70 is to be separably mounted to the base 50, and includes a sensing seat 71, and a sensor 72 that is mounted to the sensing seat 71 and that is separably coupled to the insertion needle 36. The base 50 further has a mounting portion 500 for the sensor assembly 70 to be separably mounted thereto, and the mounting methods are similar as those described in the previous embodiment.

The insertion module 30 further includes an auxiliary insertion seat 38 that is separably mounted to the insertion needle 36. The sensor assembly 70 is separably mounted to the auxiliary insertion seat 38. The auxiliary insertion seat 38 slidably engages with the main body assembly 300 to guide the insertion needle 36 to steadily insert the sensor 72 into the host without runout or inclination so as to alleviate pain of the host .

The insertion device according to the disclosure (the first to fourth embodiments and the modifications thereof) is operated in such a manner that the upper casing 10 or the cover body 12 is depressed so as to collapse the insertion limiting structure (A, A1, A2), and the first elastic member 34 therefore releases the restoring force to move the insertion seat 33 downwardly to perform the automatic-insertion operation. In other words, in this disclosure, the insertion needle 36 is driven to be inserted into the host by the first elastic member 34 rather than by manual depression of a user. Therefore, the insertion operation and the retraction operation can be smoothly performed by any user even if the user is not an adept operator .

The insertion operation performed by the third and fourth embodiments, according to the disclosure are operated via a single-action operation. The insertion operation of the sensor 72 into the host is illustrated as follows:

Referring to Figures 31 to 33, when the adhesive pad 52 is adhered to a skin surface of the host and the cover body 12 is not depressed, the insertion limiting structure (Al, A2) that is formed between the buckle portions 335 of the insertion seat 33 and the stopping portions 317 of the main body 31 maintains the insertion seat 33 at a pre-insertion position.When the cover body 12 is depressed toward the skin surface, the buckle portions 335 of the insertion seat 33 are respectively pushed by the urging portions 123 of the cover body 12 to be deformed inwardly and to be respectively separated from the stopping portions 317 of the main body 31, so that the insertion limiting structure (Al, A2) is collapsed. At the same time, the body engaging structures 315 of the main body 31 respectively engage the casing engaging structure 124 of the cover body 12, so that the cover body 12 is positioned relative to the main body 31.

After the insertion limiting structure (Al, A2) is collapsed, the restoring force of the first elastic member 34 is permitted to be released, and moves the insertion seat 33 to an insertion position to implement automatic-insertion, such that the sensor assembly 70 is moved by the insertion seat 33 to a post-insertion position, that the sensor 72 is inserted underneath the skin surface, and that the sensing seat 71 is positioned onto the mounting portion 500 of the base 50.After the sensor 72 is inserted underneath the skin surface, the limiting member 320 of the main cover 32 or the limiting member 100 of the cover body 12 is separated from the limiting groove 330 and the retraction positioning portion 334 of the insertion seat 33, so that the retraction positioning portion 334 is permitted to be deformed outwardly to collapse the retraction limiting structure (Bl, B2).As such, the restoring force of the second elastic member 37 is permitted to be released, and drives the retraction seat 35 to move past the retraction positioning portion 334 of the insertion seat 33 away from the skin surface, such that the insertion needle 36 is separated from the auxiliary insertion seat 38 and is retracted into the insertion seat 33 to hide a needle 362 thereof and to implement automatic-retraction. At this time, the coupling portions 383 of the auxiliary insertion seat 38 is maintained to be fitted into the coupling portion 711 of the sensing seat 71 so that the auxiliary insertion seat 38 is connected to the sensing seat 71 of the sensor assembly 70. Afterward, the cover body 12 and the insertion module 30 are separated from the base 50 and the skin surface of the host, so as to finish the insertion operation of the third and fourth embodiments of the insertion device including the automatic-insertion and automatic-retraction operations.

Accordingly, the third and fourth embodiments of the insertion device may further include a lower casing (not shown) that is air-tightly and separably coupled to the cover body 12 so as to form an airtight space within the insertion device. A desiccant may be provided in the inner space of the insertion device so as to prevent the sensor 72 of the sensor assembly 70 from being moistened.

In the third or fourth embodiments, a time needed for performing the automatic-insertion operation and the automatic-retraction operation (i.e., the duration for which the insertion needle 36 is inserted into the host) is no more than 100 milliseconds, no more than 50 milliseconds, no more than 8 milliseconds, no more than 6 milliseconds, no more than 4 milliseconds or no more than 2 milliseconds;

In the fourth embodiment,by virtue of the main cover 32 that cooperates with the insertion seat 33 to compress the first elastic member 34 therebetween, the restoring force of the first elastic member 34 would not act on the cover body 12 when a user depresses the cover body 12, rendering the operation of the insertion device smooth. The insertion module further includes an insertion seat 33 and a retraction seat 35. The insertion limiting structure (Al,A2) is formed between the insertion seat 33 and the main body 31. The retraction limiting structure (Bl, B2) is formed among the insertion seat 33, the retraction seat 35 and the main cover 31 or among the insertion seat 33, the retraction seat 35 and the cover body 12.

The retraction seat 35 includes an insertion needle 36. The insertion seat 33 includes a pushing portion (with reference to the reference numeral 337 in Figure 3) .After the automatic-insertion operation performed by the insertion module 30, the insertion needle 36 is inserted through the base 50 to insert a sensor 72 underneath a skin surface of a host, and the pushing portion of the insertion seat 33 tightly abuts against the sensor assembly 70 (via an auxiliary insertion seat 38) so as to prevent the sensor assembly 70 from being separated from a mounting portion 500 of the base 50.

Referring to figures 34 and 35, that are, respectively, a bottom exploded perspective view illustrating of the insertion module 30 according to any of the four embodiments and a schematic view illustrating an insertion operation of an auxiliary insertion seat. As shown in the figures, the main body assembly 300 includes a main body 31. Moreover, the main body 31 includes an accommodating hole 312 that extends along an axial line (L), and a plurality of slide grooves 313 disposed on the accommodating hole 312 around the axial line (L) and communicating with the accommodating hole 312. The slide grooves 313 are equally spaced apart from each other around the axial line (L). In this embodiment, the number of the slide grooves 313 is three. Each of the slide grooves 313 has a wall surface 316 (see Figure 34) that is gradually widened along an insertion direction (F). The wall surface 316 of each of the slide grooves 313 includes an included angle between the axial line (L) from 0 degree to 3 degrees.

As mentioned above, the insertion module 30 further includes the auxiliary insertion seat 38 that is detachably assembled with the insertion needle 36 and the sensor assembly 70 is detachably limited with respect to the auxiliary insertion seat 38. The auxiliary insertion seat 38 has the base portion 381, a plurality of wing portions 382 that are connected to the base portion 381 an extend outwardly, and a plurality of coupling protrusions 383 that protrude from a bottom surface of the base portion 381 (referring in conjunction with figure 11).

In details, the insertion needle 36 includes a needle seat 361 that is mounted between the retraction seat 35 and the base portion 381 of the auxiliary insertion seat 38, and an needle 362 that is connected to the needle seat 361. The needle seat 361 and the retraction seat 35 are able to be separated from each other so as to prevent misalignment therebetween due to manufacturing tolerance. Referring to Figure 35, the distance between a tip end 363 of the needle 362 and the skin surface of the host is defined as an initial stroke distance (H). In this embodiment, the initial stroke distance (H) is no greater than 1 millimeter.

Back to figure 34, the base portion 381 is movable along the accommodating hole 312.

The wing portions 382 of the auxiliary insertion seat 38 are equally spaced apart from each other around the axial line (L). As shown in Figure 34, there are three of the wing portions 382. However, in a modification, the number of the wing portion 382 may be two, and the wing portions 382 are equally spaced apart from each other by 180 degrees.

Each of the wing portions 382 is movable along a respective one of the slide grooves 313 and has a plurality of notches 384. Therefore, the number of the slide grooves 313 will be configured to be the same as the wing portions 382. In such embodiment, each wing portion 382 has two notches 384 that are respectively formed at top and bottom portions of the wing portion 382, such that each wing portion 382 provides a restoring force in a radially outward direction after being compressed in a radial direction of the auxiliary insertion seat 38 perpendicular to the axial line (L). Each of the wing portions 382 further has a protrusion part 385 that resiliently abutted against the wall surface 316 of the respective one of the slide grooves 313 in point-contact. In a modification of such embodiment, each wing portion 382'merely has one notch 384' that is indented upwardly from a bottom portion of said wing portion 382' as shown in figure 36. In another modification of the embodiment, each wing portion 382 merely has one notch 384' that is indented upwardly from a top portion of said wing portion 382''.

Referring to Figures 3, 4, 34 and 35, during the insertion, an initial speed of the insertion needle 36 is insufficient to ensure that the needle 362 is parallel to the insertion direction (F).At this time, the contact among the protrusion parts 385 of the wing portions 382 and the wall surfaces 316 of the slide grooves 313 serves to position the needle 362 such that the needle 362 is parallel to the insertion direction (F) . After the insertion needle 36 is accelerated to provide the insertion straightness, and prevent the needle 362 from being oblique to the insertion direction (F), the protrusion parts 385 of the wing portions 382 are separated from portions of the wall surfaces 316 of the slide grooves 313 that gradually widened along an insertion direction (F).Accordingly, the needle 362 can be guided stably in the initial stroke distance (H), and then is supported by the skin surface when the needle 362 contacts the skin surface after the initial stroke distance (H) so as to be steadily and rapidly inserted underneath the skin surface.By virtue of the notches 384 of each wing portion 382, each wing portion 382 is compressible in the radial direction of the auxiliary insertion seat 38, and generates a restoring force in the radially outward direction after being compressed.In addition, the protrusion parts 385 of the wing portions 382 abuts against the wall surfaces 316 of the slide grooves 313 to position the needle 36, such that the needle 362 is prevented from being oblique to the insertion direction (F), and that the needle 362 can be steadily inserted into the host to reduce discomfort of the host.

The advantages of the insertion device according to the disclosure are as follows:

1. The insertion device employs the pre-compressed first and second elastic members 34, 37 to perform the automatic-insertion and automatic-retraction operations, so that insertion device is operated via a single-action operation (i.e., by depressing the upper casing 10, outer shell 11 or the cover body 12) to finish the automatic-insertion and automatic-retraction operations. The insertion needle 36 is not driven to be inserted into the host by manual depression of a user. Therefore, the insertion operation and the retraction operation can be smoothly performed by any user even if the user is not an adept operator .

2. The lower casing 20 cooperates with the upper casing 10 or the cover body 12 to form the airtight space that is provided with the desiccant 60 therein, so that the sensor 72 of the sensor assembly 70 is prevented from being moistened to ensure the accuracy of the sensor assembly 70. In addition, a desiccation indicator 61 (see Figure 4) may be provided on inner or outer side of the outer shell 11 of the upper casing 10. Preferably, the desiccation indicator 61 may be an aridity indication material. The outer shell 11 may have a transparent or translucent portion through which the desiccation indicator 61 is visible, so a user can perceive whether or not the sensor assembly 70 is moistened. The manner in which the desiccant 60 is disposed is not limited to the disclosed embodiments, and the upper casing 10 and the lower casing 20 are not limited to be interconnected in a hard-interference manner . 3.Before the lower casing 20 is separated (or opened) from the upper casing 10 or from the cover body 12, the abutment portion 228 of the lower casing 20 limits movement of the casing engaging structure 124 of the cover body 12 or the upper casing 10, such that the upper casing 10 or the cover body 12 cannot move downwardly so as to prevent unintentional insertion operation of the insertion device due to unintentionally applying force to the insertion device.

4. After the automatic-retraction operation, the insertion needle 36 is separated from the auxiliary insertion seat 38 and is retracted into the insertion seat 33 to hide a needle 362.

5. By virtue of the main cover 32 that cooperates with the insertion seat 33 to compress the first elastic member 34 therebetween, the restoring force of the first elastic member 34 would not act on the upper casing 10 or the cover body 12 when a user depresses the upper casing 10 or the cover body 12, rendering the operation of the insertion device smooth.

6. The auxiliary insertion seat 38 slidably engages with the main body assembly 300 to guide the insert direction of the insertion needle 36 to steadily insert the sensor72 into the host without runout or inclination so as to alleviate pain of the host.

7. The base 50 has a mounting portion 500 for the sensor assembly 70 to be separably mounted thereto. The mounting portion 500 may include a recess 501 that permits the sensor assembly 70 to be press-fitted thereinto, and/or an adhesive layer 502 (e.g., double-sided tape) that is disposed in the recess 501 for the sensor assembly 70 to be adhered thereto, or at least one resilient hook 503 that is for engaging with the sensor assembly 70.

8. After the upper casing 10 (or housing 11) or the cover body 12 is depressed, a time needed for performing the automatic-insertion operation and the automatic-retraction operation is no more than 100 milliseconds, no more than 50 milliseconds, no more than 8 milliseconds, no more than 6 milliseconds, no more than 4 milliseconds or no more than 2 milliseconds.

9. In assembling the insertion device, the first elastic member 34, the retraction seat 35 , the second elastic member 37 and the insertion seat 33 are firstly disposed between the main cover 32 and the main body 31, and the auxiliary insertion seat 38 and the sensor assembly 70 are mounted to the insertion needle 36 before the insertion needle 36 is mounted to the retraction seat 35. Whereby the sensor assembly 70 and the insertion module 30 forming a clutch design, which can not only greatly improve the assembly yield, but also effectively reduce the cost of the sensor assembly .

10. The sensor assembly 70 has been mounted to the insertion module 30 via the auxiliary insertion seat 38 (see Figure 29), so the sensor assembly 70 does not require additional manual operation of grasping the sensor assembly 70 onto the base50 by the implanting module 30.

11. An inner side of a bottom portion of the upper casing 10 may be provided with a cushion wall 80 (see Figures 17 to 21) that is substantially ring-shaped. Before the insertion device is operated, the base 50 is higher than a bottom edge of the cushion wall 80. When the bottom edge of the cushion wall 80 abuts against the skin surface of the host, the base 50 is spaced apart from the skin surface, so a user can move the insertion device along the skin surface to a desired position, an depress the upper casing 10. The cushion wall 80 retracts into the upper casing 10 upon the depression, such that the base 50 can be mounted onto the skin surface. By virtue of the cushion wall 80, the insertion device can be moved along the skin surface to a desired position with the cushion wall 80 abutting against the skin surface, rendering the insertion operation stable .

12. When the lower casing 20 is re-coupled to the outer shell 11 of the upper casing 10, the engagement between the lower positioning portion 227 of the lower casing 20 and the upper positioning portion 116 of the upper casing 10 ensures that the lower casing 20 and the upper casing 10 are properly positioned to each other .

In the description above, for the purposes of explanation, numerous specific details have been set forth in order to provide a thorough understanding of the embodiments. It will be apparent, however, to one skilled in the art, that one or more other embodiments may be practiced without some of these specific details. It should also be appreciated that reference throughout this specification to "one embodiment," "an embodiment," an embodiment with an indication of an ordinal number and so forth means that a particular feature, structure, or characteristic may be included in the practice of the disclosure. It should be further appreciated that in the description, various features are sometimes grouped together in a single embodiment, figure, or description thereof for the purpose of streamlining the disclosure and aiding in the understanding of various inventive aspects, and that one or more features or specific details from one embodiment may be practiced together with one or more features or specific details from another embodiment, where appropriate, in the practice of the disclosure.

While the disclosure has been described in connection with what are considered the exemplary embodiments, it is understood that this disclosure is not limited to the disclosed embodiments but is intended to cover various arrangements included within the spirit and scope of the broadest interpretation so as to encompass all such modifications and equivalent arrangements .