Tube adapted to support frame of child carriage, support frame, and child carriage

Field of the Invention

The present invention relates to a child product, particularly a tube adapted to a support frame of a child carriage.

Background of the Invention

Nowadays, there are various child carriages widely used. The stability of a support frame on the child carriage is directly related to the safety of the child carriage. Since a child often jumps in the child carriage, the child will generate a greater impact on the child carriage in the up and down direction. The tubes of the support frame of the child carriage of the prior art cannot withstand greater impact, which will cause the tubes to bend, deform or break, such that the child carriage cannot be supported stably. Consequently, the child may fall or hit a rigid structure of the child carriage, thereby being injured. The prior art increases the caliber of the tube or increases the wall thickness of the tube to enhance the rigidity and moment of inertia of the tube, so as to improve the bending resistance and impact resistance of the tube. However, the aforesaid manner will inevitably increase manufacturing cost of the tube. Furthermore, due to the change in the size of the tube, the tube cannot match and connect with a standard joint, such that the tube cannot be replaced and used normally.

Therefore, it is necessary to provide a tube adapted to a support frame of a child carriage, wherein the tube is capable of matching and connecting with a standard joint and capable of effectively improving the bending resistance and impact resistance.

Summary of the Invention

The present invention aims at providing a tube adapted to a support frame of a child carriage, wherein the tube is capable of matching and connecting with a standard joint and capable of effectively improving the bending resistance and impact resistance.

The present invention further aims at providing a support frame, wherein the support frame has a tube capable of matching and connecting with a standard joint and capable of effectively improving the bending resistance and impact resistance, so as to enhance the stability of the support frame.

The present invention further aims at providing a child carriage, wherein the child carriage has a support frame capable of enhancing the stability to improve the bending resistance and impact resistance of the child carriage, so as to improve the comfort and safety of the child carriage.

This is achieved by a tube according to claim 1, a support frame according to claim 11, and a child carriage according to claim 14. The dependent claims pertain to corresponding further developments and improvements.

As will be seen more clearly from the detailed description following below, the claimed tube is adapted to a support frame of a child carriage. The tube is a hollow structure. Two connecting segments are formed at both ends of the tube, have identical structures, and are used for connection. A support segment is formed between the two connecting segments of the tube. A cross-sectional moment of inertia of the support segment is larger than a cross-sectional moment of inertia of the connecting segment.

Compared to the prior art, the tube adapted to the support frame of the child carriage of the invention consists of the support segment and the connecting segments. The cross-sectional moment of inertia of the support segment is larger than the cross-sectional moment of inertia of the connecting segment. The tube of the invention is assembled on the support frame while being used. When the child carriage with the support frame suffers a strong impact, the strong impact will directly act on the support frame, such that the tube on the support frame suffers the strong impact. Since the support segment of the tube of the invention has larger cross-sectional moment of inertia, the tube of the invention can effectively resist the strong impact and effectively prevent the tube from bending, deforming or even breaking due to the impact, so as to improve the comfort and safety of the child carriage. Furthermore, the connecting segment of the tube of the invention is consistent with the size of the conventional tube. When the conventional tube is bent, deformed or broken, the tube of the invention can be used for replacement directly without replacing the joints or other accessories. The operation is simple, quick and convenient. After replacement, the bending resistance and impact resistance of the support frame and the child carriage can be greatly improved, thereby increasing the stability of the support frame and the child carriage.

Preferably, a cross-section of the connecting segment and a cross-section of the support segment are circular structures.

Preferably, a wall thickness of the connecting segment and a wall thickness of the support segment are identical.

Preferably, a caliber of the connecting segment is smaller than a caliber of the support segment.

Preferably, an arc segment is connected between the connecting segment and the support segment. The arc segment between the connecting segment and the support segment may be formed by a shrinking process. The operation is simple and quick and the structural integrity of the connecting segment and the support segment is ensured, such that the bending resistance and impact resistance of the tube adapted to the support frame of the child carriage of the invention is further improved.

Preferably, the tube of the invention is a one-piece structure. The one-piece structure can ensure the stability and firmness of the tube in use and further improve the bending resistance and impact resistance of the tube adapted to the support frame of the child carriage of the invention.

Preferably, the connecting segment is a straight tube structure. The straight tube structure can facilitate the connection between tubes.

Preferably, the support segment is a curved tube structure. The curved tube structure can further improve and strengthen the bending resistance and impact resistance of the tube adapted to the support frame of the child carriage of the invention. Preferably, the support segment is a symmetrical structure and has a protruding middle portion. The symmetrical structure and the protruding middle portion can make the material distribution of the tube uniform, improve the structural strength of the tube, and ensure the stable support capability of the tube.

Preferably, a ratio of the cross-sectional moment of inertia of the support segment to the cross-sectional moment of inertia of the connecting segment is between 2.0 and 3.0. The cross-sectional moment of inertia of the connecting segment may be 3826.50 mm ⁴ and the cross-sectional moment of inertia of the support segment may be 9363.63 mm ⁴ .

As will be seen more clearly from the detailed description following below, the claimed support frame includes two joints and the aforesaid tube, wherein the tube is connected between the two joints and used for support. The two connecting segments are connected to the two joints.

Compared to the prior art, the support frame includes two joints and a tube, wherein the tube is connected between the two joints and used for support. The tube adapted to the support frame of the child carriage includes two connecting segments identical to the conventional tube. The two connecting segments are connected with the support segment having larger cross-sectional moment of inertia. The connecting segment of the tube of the invention is identical to the conventional tube. When the conventional tube of the support frame is damaged or broken, the tube of the invention can be used for replacement directly without replacing the joints or other accessories. After replacement, the bending resistance and impact resistance of the support frame can be greatly improved, thereby increasing the stability of the support frame. Furthermore, since the tube of the invention has larger cross-sectional moment of inertia than the conventional tube, the support frame equipped with the tube of the invention has stronger bending resistance and impact resistance then a support frame equipped with the conventional tube, thereby greatly improving the stability of the support frame of the invention.

Preferably, the two connecting segments are pivotally connected to the two joints.

Preferably, the support frame is a stroller structure, a crib structure, a cradle structure or a rocker structure.

As will be seen more clearly from the detailed description following below, the claimed child carriage includes a carriage body and the aforesaid support frame for supporting the carriage body.

Compared to the prior art, the child carriage of the invention includes the carriage body and the support frame capable of effectively improving the bending resistance and impact resistance. When the child carriage with the support frame suffers a strong impact, the strong impact will directly act on the support frame, such that the tube on the support frame suffers the strong impact. Since the support segment of the tube of the child carriage of the invention has larger cross-sectional moment of inertia, the tube of the invention can effectively resist the strong impact and effectively prevent the tube from bending, deforming or even breaking due to the impact, so as to improve the stability of the child carriage and then improve the comfort and safety of the child carriage. The child carriage of the invention is suitable for wide promotion and application.

Preferably, the support frame is a folding structure.

Brief Description of the Drawings

In the following, the invention is further illustrated by way of example, taking reference to the accompanying drawings thereof:

FIG. 1 is a schematic view illustrating the structure of a conventional tube,

FIG. 2 is a schematic view illustrating the structure of a child carriage of the invention,

FIG. 3 is a schematic view illustrating the structure of a tube adapted to a support frame of a child carriage of the invention shown in FIG. 3,

FIG. 4 is a cross-sectional view of FIG. 3 along line A- A, and

FIG. 5 is a cross-sectional view of FIG. 3 along line B-B. Detailed Description

In order to explain the disclosure, structural features, and achieved effects in detail, the invention will be further described with the embodiments and drawings in the following.

Referring to FIG. 1 and FIGs. 3 to 5, a child carriage 1 of the invention includes a carriage body 100 for supporting a child and a support frame 200 for supporting the carriage body 100. The support frame 200 includes joints 21, 22 and tubes 23 connected between the joints 21, 22 and used for support. The tube 23 is a hollow structure. Two connecting segments 233 are formed at both ends of the tube 23, have identical structures, and are used for connecting the joints 21, 22. The structure of the two connecting segments 233 is identical to the conventional tube 23' (as shown in FIG. 1). A support segment 231 is formed between the two connecting segments 233. A cross-sectional moment of inertia of the support segment 231 is larger than a cross-sectional moment of inertia of the connecting segment 233. The tube 23 of the invention is assembled on the support frame 200. When the child carriage 1 with the support frame 200 suffers a strong impact, the strong impact will directly act on the support frame 200, such that the tube 23 on the support frame 200 suffers the strong impact. Since the support segment 231 of the tube 23 of the invention has larger cross-sectional moment of inertia, the tube 23 of the invention can effectively resist the strong impact and effectively prevent the tube 23 from bending, deforming or even breaking due to the impact, so as to improve the comfort and safety of the child carriage 1. Furthermore, the connecting segment 233 of the tube 23 of the invention is consistent with the size of the conventional tube 23'. When the conventional tube 23' is bent, deformed or broken, the tube 23 of the invention can be used for replacement directly without replacing the joints 21, 22 or other accessories. The operation is simple, quick and convenient. After replacement, the bending resistance and impact resistance of the support frame 200 and the child carriage 1 can be greatly improved, thereby increasing the stability of the support frame 200 and the child carriage 1.

Referring to FIGs. 1 and 3, the cross-sectional moment of inertia of the tube 23 adapted to the support frame of the child carriage of the invention is compared to the cross-sectional moment of inertia of the conventional tube 23'. Specifically, FIG. 1 shows the structure of the conventional tube 23'. As shown in FIG. 1, the two connecting segments 233' and the support segment 23 G of the conventional tube 23' have identical structures and sizes. In an exemplary embodiment, a random cross-sectional area of the connecting segments 233' and the support segment 23 G may be 45.87 mm ² and a random cross-sectional moment of inertia may be 3826.50 mm ⁴ . FIG. 3 shows the structure of the tube 23 of the invention and the cross-sectional moment of inertia of the support segment 231. As shown in FIG. 3, the connecting segment 233 of the tube 23 of the invention is consistent with the structure and size of the connecting segment 233' and the support segment 23 G of the conventional tube 23'. Thus, the cross-sectional moment of inertia of the connecting segment 233 of the tube 23 of the invention is identical to the cross-sectional moment of inertia of the connecting segment 233' of the conventional tube 23'. In an exemplary embodiment, a cross-sectional area of the support segment 231 of the tube 23 of the invention may be 61.83 mm ² and a cross-sectional moment of inertia thereof may be 9363.63 mm ⁴ , which is much larger than the cross-sectional moment of inertia of the connecting segment 233' and the support segment 23 G of the conventional tube 23'. Accordingly, compared to the conventional tube 23', the tube 23 of the invention greatly improves the bending resistance and impact resistance. When the support frame 200 with the tube 23 of the invention is applied to the child carriage 1, the child carriage 1 will have better bending resistance and impact resistance, thereby improving the safety and comfort of the child carriage 1.

Preferably, as shown in FIG. 2, the support frame 200 of the child carriage 1 of the invention is a folding structure, so as to facilitate storage and carrying when not in use. This folding structure is well known by one skilled in the art and will not be described in detail herein. Specifically, the support frame 200 of the invention may be a stroller structure, a crib structure, a cradle structure or a rocker structure. It should be noted that when the support frame 200 is a stroller structure, a cradle structure or a rocker structure, the principle thereof is identical to a crib structure. Thus, the crib structure is used as an example only for describing the support frame 200 in the following. The support frame 200 and the tube 23 of the invention will be further described in detail with reference to FIGs. 2 to 5.

Referring to FIGs. 2 and 3, the joints 21, 22 of the invention have pivot holes 211, 221 formed thereon, respectively. The two connecting segments 233 of each tube 23 have installation holes 30 corresponding to the pivot holes 211, 221. The tube 23 of the invention may be pivotally connected between the joints 21, 22 by inserting pins or rivets into the pivot holes 211, 221 and the installation holes 30. FIG. 2 only illustrates that the two connecting segments 233 of the tube 23 are connected to the joints 21, 22 with different structures. However, according to the specific structure of the support frame 200, the structures of the joints 21, 22 connected with the two connecting segments 233 of the tube 23 may be identical at different positions of the support frame. One skilled in the art can realize the connection specifically without any inventive step according to the aforesaid manner, so it will not be repeated herein.

It should be noted that FIG. 3 only illustrates the specific structure of the support frame 200 applied to a crib. Needless to say, according to the different functions of the support frame 200, the cooperation between the tube 23 of the invention and the joints can be used to assemble a conventional support frame suitable for use. The support frame 200 equipped with the tube 23 of the invention is the same in structure as the conventional support frame. The difference is that the support frame 200 of the invention replaces the conventional tube 23' by the tube 23 of the invention, such that the support frame 200 equipped with the tube 23 of the invention has better bending resistance and impact resistance than the conventional support frame.

Referring to FIGs. 3 to 5, preferably, a cross-section of the connecting segment 233 and a cross-section of the support segment 231 of the tube 23 of the invention are circular structures. In order to achieve that the cross-sectional moment of inertia of the support segment 231 is larger than the cross-sectional moment of inertia of the connecting segment 233, a caliber R1 of the connecting segment 233 is smaller than a caliber R2 of the support segment 231 (FIGs. 4 and 5 are cross-sectional views under the same scale). Specifically, the wall thicknesses of the connecting segment 233 and the support segment 231 of the tube 23 of the invention are equal to d, and an inner radius rl of the connecting segment 233 is smaller than an inner radius r2 of the supporting segment 231. In another embodiment, the inner radii of the connecting segment 233 and the support segment 231 may be identical and the wall thickness of the connecting segment 233 may be smaller than the wall thickness of the supporting segment 231, so as to achieve that the caliber Rl of the connecting segment 233 is smaller than the caliber R2 of the support segment 231. Referring to FIG. 3, an arc segment 232 is connected between the connecting segment 233 and the support segment 231, wherein the arc segment 232 may be formed by a shrinking process. The operation is simple and quick and the structural integrity of the connecting segment 233 and the support segment 231 is ensured, such that the bending resistance and impact resistance of the tube 23 adapted to the support frame of the child carriage of the invention is further improved.

In order to further improve the bending resistance and impact resistance of the tube 23 adapted to the support frame of the child carriage of the invention, the tube 23 of the invention is a one-piece structure. The one-piece structure can further improve the stability and firmness of the tube 23 in use.

As shown in FIGs. 2 to 5, preferably, in order to conveniently and quickly connect the tube 23 of the invention and the joints 21, 22, the connecting segment 233 of the invention is a straight tube structure and a ratio of the cross-sectional moment of inertia of the support segment 231 to the cross-sectional moment of inertia of the connecting segment 233 is between 2.0 and 3.0. More specifically, the cross-sectional moment of inertia of the connecting segment 233 may be 3826.50 mm ⁴ and the cross-sectional moment of inertia of the support segment 231 may be 9363.63 mm ⁴ . In order to further improve the bending resistance and impact resistance of the tube 23 of the invention, the support segment 231 of the invention is a curved tube structure. Preferably, the support segment 231 is a symmetrical structure and has a protruding middle portion. The curved tube structure with the symmetrical structure can further improve the bending resistance and impact resistance of the tube 23 of the invention, so as to ensure the stable support capability of the tube 23.

As shown in FIGs. 1 to 5, the invention provides the tube 23 adapted to the support frame of the child carriage, the support frame 200 with the tube 23, and the child carriage 1. When the child carriage 1 with the support frame 200 suffers a strong impact, the strong impact will directly act on the support frame 200, such that the tube 23 on the support frame 200 suffers the strong impact. Since the support segment 231 of the tube 23 of the child carriage 1 of the invention has larger cross-sectional moment of inertia, the tube 23 of the invention can effectively resist the strong impact and effectively prevent the tube 23 from bending, deforming or even breaking due to the impact, so as to improve the stability of the child carriage 1 and then improve the comfort and safety of the child carriage 1. Furthermore, the connecting segment 233 of the tube 23 of the invention is consistent with the size of the conventional tube 23'. When the conventional tube 23' is bent, deformed or broken, the tube 23 of the invention can be used for replacement directly without replacing the joints 21, 22 or other accessories. The operation is simple, quick and convenient. After replacement, the bending resistance and impact resistance of the support frame 200 and the child carriage 1 can be greatly improved, thereby increasing the stability of the support frame 200 and the child carriage 1.

The foregoing are only preferred embodiments of the invention while the protection scope thereof is not limited to the above description. Any change or substitution within the technical scope disclosed by the invention should be covered by the protection scope of the invention.