LIM, Kun Taek (501-302 Samju Apt, Buk-ri,Jillyang-eup, Gyeongsan-si, Gyeongsangbuk-do 712-835, KR)
LEE, Sang Hee (101-802 Bogook Wellrich Apt, Sinsang-ri,Jillyang-eup, Gyeongsan-si, Gyeongsangbuk-do 712-837, KR)
LEE, Chul Sub (2 Boseong 1cha seohan Apt, Sinmae-dong, Suseong-gu, Daegu 706-170, 62-1502, KR)
LIM, Kun Taek (501-302 Samju Apt, Buk-ri,Jillyang-eup, Gyeongsan-si, Gyeongsangbuk-do 712-835, KR)
LEE, Sang Hee (101-802 Bogook Wellrich Apt, Sinsang-ri,Jillyang-eup, Gyeongsan-si, Gyeongsangbuk-do 712-837, KR)
| Claims [1] A shield cover for connecting a braided wire wrapping an electric cable therein to a shield unit of a connector housing in a grounded state, wherein the shield cover comprises a pressure fixing unit for pushing an end of the braided wire into a space defined between an outer circumferential part of the shield unit at a rear thereof and an inner circumferential part of the connector housing at a rear thereof to fix the braided wire to an outside of the shield unit in a grounded state. [2] The shield cover according to claim 1, wherein the inner circumferential part of the pressure fixing unit comprises: fixing plane for tightly pressing the braided wire against the outside of the shield unit; and an inclined plane extending from the fixing plane in a tapered manner for guiding the braided wire to the outside of the shield unit. [3] The shield cover according to claim 1 or 2, wherein the pressure fixing unit is provided at a rear thereof with a vertical contact plane for pressing the braided wire against one end of the shield unit, and the vertical contact plane comprises convex parts for partially pressing the braided wire to prevent separation of the braided wire. |
Technical Field
[1] The present invention relates to a shield cover for coupling a braided wire wrapping an electric cable therein to shield the electric cable to a shield member provided in a connector, and, more particularly, to a shield cover for a braided wire shield that fixedly connects a braided wire to a shield member through a single fitting operation without arranging an end of the braided wire. Background Art
[2] It is necessary for an electric cable, through which an electric signal is transmitted or a high- voltage electric power is supplied, to be shielded such that the electric signal is protected from interference by an external electromagnetic wave or an electromagnetic wave generated from the electric cable, through which an electric current flows, is prevented from affecting sensitive electronic equipment in the vicinity of the electromagnetic wave.
[3] Such shielding may be achieved by the provision of, for example, a braided wire including a plurality of flexible conducting wires woven in the form of a net to wrap the electric cable therein.
[4] Meanwhile, connection between electric cables or connection between an electric cable and a different device may be achieved mainly through an exclusive connector. The connector includes a lead electrically connected to the electric cable and a shield member, made of a conductive material, such as metal, electrically connected to a braided wire for shielding the lead.
[5] The shield member is configured to wrap the lead therein. The shield member is provided not only in a female connector but also in a male connector. The shield members contact each other when the female and male connectors are coupled to each other. Consequently, the leads connected to the respective electric cables are coupled to each other in a shield space of the shield member electrically connected to the braided wire for shielding an electric signal or an electric current passing through the connectors.
[6] A conventional method of connecting a shield member 12 and a braided wire T is shown in FIG. 7.
[7] According to the conventional method shown in FIG. 7, one end of the braided wire, wrapping an electric cable W therein, is widened to surround the outer circumference of the shield member 12 using an additional braided wire widening apparatus, and additional clamp members 14 are coupled to the shield member 12 above and below the shield member 12 for tightly fixing the braided wire T to the shield member 12.
[8] In FIG. 7, two clamp members, i.e., the upper and lower clamp members, are coupled to the shield member. Alternatively, a band type clamp member may be provided. In this case, opposite ends of the clamp member are fixedly connected to each other by a screw.
[9] According to the conventional method using the clamp members, the braided wire may be easily torn due to fastening force of the clamp members. In particular, when vertical protrusions or depressions are formed at the outer circumference of the shield member, and the braided wire located at the protrusions or depressions is pressed by the clamp members, the braided wire may be plastically deformed, with the result that, due to external force, such as vibration or pulling force, the plastically deformed portions of the braided wire may be easily torn during subsequent use thereof. As result, the shielding performance of the braided wire is considerably deteriorated. Consequently, noise may be generated in an electric signal, and therefore, corresponding equipment may malfunction.
[10] Also, it is necessary to perform a process for coupling the clamp members to the shield member, with the result that labor costs are increased. In addition, it is necessary to provide an apparatus for coupling the clamp members to the shield member, with the result that apparatus-related costs are increased. Furthermore, time for coupling the clamp members to the shield member is necessary, with the result that productivity is lowered.
Disclosure of Invention
Technical Problem
[11] Therefore, the present invention has been made in view of the above problems, and it is an object of the present invention to provide a shield cover for a braided wire shield that is capable of tightly fixing a braided wire to the outside of a shield member through a single pressing operation.
[12] It is another object of the present invention to provide a shield cover for a braided wire shield wherein coupling of the shield cover to a shield member is achieved using small force, and the shield cover includes a space for receiving an entangled portion having nonuniform thickness at one end of a braided wire when the shield cover is completely fitted onto the shield member.
[13] It is a further object of the present invention to provide a shield cover for a braided wire shield that is capable of preventing a braided wire from being separated from a connection housing although the braided wire is pulled, thereby increasing coupling force. Technical Solution [14] In accordance with the present invention, the above and other objects can be accomplished by the provision of a shield cover for connecting a braided wire wrapping an electric cable therein to a shield unit of a connector housing in a grounded state, wherein the shield cover includes a pressure fixing unit for pushing an end of the braided wire into a space defined between an outer circumferential part of the shield unit at a rear thereof and an inner circumferential part of the connector housing at a rear thereof to fix the braided wire to an outside of the shield unit in a grounded state.
[15] The inner circumferential part of the pressure fixing unit may include a fixing plane for tightly pressing the braided wire against the outside of the shield unit and an inclined plane extending from the fixing plane in a tapered manner for guiding the braided wire to the outside of the shield unit.
[16] The pressure fixing unit may be provided at a rear thereof with a vertical contact plane for pressing the braided wire against one end of the shield unit, and the vertical contact plane may include convex parts for partially pressing the braided wire to prevent separation of the braided wire.
Advantageous Effects
[17] The shield cover for the braided wire shield according to the embodiment of the present invention has the effect of securely and tightly fixing the braided wire to the shield unit of the connector housing at a time through the pressure fixing unit having the inclined plane without using an additional clamp.
[18] Also, a large load is not applied to the pressure fixing unit by the inclined plane formed at the inner circumference of the pressure fixing unit during initial fitting of the shield cover onto the connector housing. Consequently, the shield cover for the braided wire shield according to the embodiment of the present invention has the effect of achieving easy coupling of the shield cover to the connector housing and preventing breakage of the pressure fixing unit. In addition, the inclined plane receives entangled portions of the braided wire at the end thereof when the shield cover is completely fitted onto the connector housing, and therefore, the braided wire is securely presses by the fixing plane. Consequently, the shield cover for the braided wire shield according to the embodiment of the present invention has the effect of maintaining pressing force applied to the braided wire.
[19] Meanwhile, the convex parts formed at the vertical contact plane strongly press the braided wire against the corresponding end of the shield unit, and therefore, the braided wire is prevented from sliding and being separated from the vertical contact plane when the braided wire is pulled rearward. Consequently, the shield cover for the braided wire shield according to the embodiment of the present invention has the effect of achieving secure fixing of the braided wire. Brief Description of Drawings
[20] The above and other objects, features and other advantages of the present invention will be more clearly understood from the following detailed description taken in conjunction with the accompanying drawings, in which:
[21] FIG. 1 is a perspective view illustrating a connector housing, a braided wire, and a shield cover for a braided wire shield according to an embodiment of the present invention before assembly thereof;
[22] FIG. 2 is a partial sectional view of the connector housing, the braided wire, and the shield cover for the braided wire shield shown in FIG. 1 after assembly thereof;
[23] FIG. 3 is a perspective view of the shield cover for the braided wire shield shown in
FIG. 1;
[24] FIG. 4 is a partial sectional view illustrating another use of the shield cover for the braided wire shield shown in FIG. 1 ;
[25] FIG. 5 is a schematic plan view of FIG. 4;
[26] FIG. 6 is a partial sectional view illustrating a further use of the shield cover for the braided wire shield shown in FIG. 1 ; and
[27] FIG. 7 is a view illustrating a conventional art.
Best Mode for Carrying out the Invention
[28] Now, a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings. The same or similar elements are denoted by the same reference numerals even though they are depicted in different drawings.
[29] FIG. 1 is a perspective view illustrating a connector housing, a braided wire, and a shield cover for a braided wire shield according to an embodiment of the present invention before assembly thereof, and FIG. 2 is a partial sectional view of the connector housing, the braided wire, and the shield cover for the braided wire shield shown in FIG. 1 after assembly thereof. FIG. 3 is a perspective view of the shield cover for the braided wire shield shown in FIG. 1.
[30] First, a connector housing 2, on which a shield cover 1 according to an embodiment of the present invention will be fitted, and a shield unit 21, against which a braided wire 3 is tightly pressed by the shield cover 1, will be described.
[31] The connector housing 2 includes a lead 22 electrically connected to an electric cable
4 wrapped in the braided wire 3 and a shield unit 21 for shielding the lead 22. The shield unit 21 includes an insulator 211 for wrapping the lead 22 and the electric cable 4 and a shield member 212 surrounding the insulator 211.
[32] The connector housing 2 further includes an outer insulator 23 surrounding the shield unit 21. Between an outer circumferential part of the shield unit 21 at the rear thereof and an inner circumferential part of the outer insulator 23 at the rear thereof is defined an inner space P, in which one end of the braided wire 3 contacting the shield member 212 is located.
[33] In this embodiment, the shield cover 1 for the braided wire shield is fitted on the connector housing 2 to tightly fix the braided wire 3 wrapping the electric cable 4 therein to the shield member 212 of the connector housing 2 in an electrically conducting state.
[34] The shield cover 1 includes an inner circumferential part 11 forming a through hole
111 through which the electric cable 4 wrapped in the braided wire 3 extends. The shield cover 1 is coupled to the connector housing 2 through an outer circumferential part 12 widened frontward from the inner circumferential part 11.
[35] The coupling between the shield cover 1 and the connector housing 2 may be achieved through a well-known structure in which a hole is formed in the outer circumferential part of the shield cover, and a protrusion formed at the connector housing is inserted into the hole.
[36] In the shield cover 1 is also formed a pressure fixing unit 13 extending frontward from the inner circumferential part 11 such that the pressure fixing unit 13 is spaced apart from the outer circumferential part 12. The pressure fixing unit 13 is located in the inner space P for fixing the braided wire 3 to the outside of the shield unit 21 in a grounded state. The pressure fixing unit 13 extends frontward from the inside of the shield cover 1. Specifically, the pressure fixing unit 13 is formed in the shape of a cantilever having one end fixed to the inside of the shield cover 1. It is preferable for the pressure fixing unit 13 to have elasticity in the direction in which the pressure fixing unit 13 is widened when the pressure fixing unit 13 contacts the shield unit 21.
[37] In this case, the pressure fixing unit 13 pushes the corresponding end of the braided wire 3 into the inner space P defined between the outer circumferential part of the shield unit 21 at the rear thereof and the inner circumferential part of the connector housing 2 at the rear thereof during forcible fitting of the shield cover 1 onto the connector housing 2, with the result that the braided wire 3 is automatically adjusted and arranged.
[38] The pressure fixing unit 13 has an inner circumferential part 131 formed in parallel to the outer circumferential part of the shield unit 21. The inner circumferential part 131 includes a fixing plane 131a for pressing the braided wire 3 against the outside of the shield unit 21 to fix the braided wire 3 and an inclined plane 131b extending frontward from the fixing plane 131a in a tapered manner.
[39] The inclined plane 13 Ib formed at the front of the inner circumferential part 131 prevents the pressure fixing unit 13 from being damaged due to an excessive load in an initial process for pushing the braided wire 3 into the shield unit 21. Also, the inclined plane 131b forms a receiving space for receiving some tangled portions of the corresponding end of the braided wire 3 after complete fitting of the shield cover 1 onto the connector housing 2.
[40] Meanwhile, the pressure fixing unit 13 is provided at the rear thereof with a vertical contact plane 14 for pressing the braided wire 3 against one end of the shield unit 21. The vertical contact plane 14 includes convex parts 141 for partially pressing the braided wire 3 to prevent separation of the braided wire 3.
[41] The vertical contact plane 14 protrudes from the rear of the pressure fixing unit 13.
When the shield cover 1 is completely fitted onto the connector housing 2, the vertical contact plane 14 comes into plane contact with the corresponding end of the shield unit 21 at the rear thereof.
[42] The inner circumferential part of the shield cover 1 may vertically extend rearward to form the vertical contact plane 14. Alternatively, the vertical contact plane 14 may extend from the rear of the pressure fixing unit 13 toward the interior of the shield cover 1.
[43] Meanwhile, the convex parts 141 protrude from the vertical contact plane 14 for pressing the braided wire 3 against the corresponding end of the shield unit 21 with greater pressing force to prevent separation of the braided wire 3 due to slippage thereof.
[44] The convex parts 141 may be formed in the shape of hemispheric or conical protrusions protruding from the vertical contact plane 14 to press the braided wire 3. The vertical contact plane 14 may be formed in the shape of saw teeth to increase pressing force through line contact thereof.
[45] Hereinafter, the operation of the shield cover for the braided wire shield according to the embodiment of the present invention will be described in detail with reference to FIGS. 2 and 4 to 6.
[46] First, as shown in FIG. 2, one end of the braided wire 3 is widened such that the outer size of the braided wire 3 is greater than that of the connector housing 2 using an additional braided wire widening apparatus (not shown) in a state in which the electric cable 4 wrapped in the braided wire 3 extends through the inner circumferential part 11 of the shield cover 1, and the electric cable 4 is connected to the lead 22 of the connector housing 2.
[47] Since the braided wire 3 includes a plurality of conducting wires woven in the form of a net, some of the conducting wires may be easily tangled when the end of the braided wire 3 is widened.
[48] As a result, some of the conducting wires overlap one another at the widened end of the braided wire 3, and therefore, the thickness of the conducting wires is increased. Some of the conducting wires are curled and twisted at the widened end of the braided wire 3. In addition, some of the conducting wires lump in a certain direction at the widened end of the braided wire 3, with the result that the conducting wires are not uniformly distributed.
[49] When the shield cover 1 is fitted onto the connector housing 2, as shown in FIG. 4, the widened end of the braided wire 3 is narrowed to tightly wrap the electric cable 4 by the inner circumferential part 11 of the shield cover 1. Also, the widened end of the braided wire 3 is pushed to the outside of the shield unit 21, i.e., into the inner space P, by the pressure fixing unit 13.
[50] At this time, the inclined plane 131b of the pressure fixing unit 13 presses the braided wire 3 placed on the edge of the shield unit 21 to align the conducting wires of the braided wire 3 in the longitudinal direction of the shield unit 21. As a result, the pressure fixing unit 13 is advanced along the braided wire 3 aligned in the longitudinal direction of the shield unit 21. Consequently, a large load is not applied to the pressure fixing unit 13 during initial fitting of the shield cover 1 onto the connector housing 2, and therefore, the breakage of the pressure fixing unit 13 or the shield cover 1 due to the load applied to the pressure fixing unit 13 is prevented when the pressure fixing unit 13 is fitted in the outer circumference part of the shield unit 21.
[51] Referring to FIG. 5, the braided wire 3 is slowly pressed against the shield member
212 by the inclined plane 131b. With the increase of pressing force applied to the braided wire 3, therefore, some of the conducting wires 31 crowded to one side are dispersed to come into uniform contact with the outer circumferential part of the shield unit 21.
[52] As a result, the conducting wires 31 of the braided wire 3 are uniformly arranged and pressed at the outer circumferential part of the shield unit 21, thereby maintaining a lead shielding performance thereof.
[53] Meanwhile, as shown in FIG. 6, the pressure fixing unit 13 is deeply inserted into the inner space P when the shield cover 1 is completely coupled to the connector housing 2. At this time, the braided wire 3 is tightly fixed to the shield member 212 by the fixing plane 131a of the pressure fixing unit 13.
[54] Also, the inclined plane 131b forms a receiving space C for receiving some curled conducting wires at the end of the braided wire 3. Consequently, the pressure fixing unit 13 is prevented from being widened due to the curled conducting wires, and therefore, the braided wire 3 is sufficiently pressed. That is, some conducting wires curled during widening of the braided wire 3 are placed in the receiving space formed by the inclined plane 131b, with the result that the pressure fixing unit 13 is prevented from being widened, thereby achieving stable fixing of the braided wire 3.
[55] Also, the convex parts 141 formed at the vertical contact plane 14 strongly press the braided wire 3 against the corresponding end of the shield unit 21. Consequently, the braided wire 3 is prevented from sliding and being separated from the vertical contact plane 14 when the braided wire 3 is pulled rearward.
[56] As previously described, the convex parts 141 strongly press the conducting wires uniformly distributed at the inclined plane 131b of the pressure fixing unit 13, thereby more effectively preventing separation of the braided wire 3.
[57] In this way, the braided wire 3 is aligned and pressed during the coupling between the shield cover 1 and the connector housing 2 through a single push operation, and therefore, an additional clamp member, which is necessary in the related art, is not needed. As a result, the coupling of the clamp member to the outer components is not needed. Consequently, manufacturing costs are reduced, and rapid assembly is achieved. Mode for the Invention
[58] Various embodiments have been described in the best mode for carrying out the invention. Industrial Applicability
[59] As is apparent from the above description, the shield cover for the braided wire shield according to the embodiment of the present invention has the effect of securely and tightly fixing the braided wire to the shield unit of the connector housing at a time through the pressure fixing unit having the inclined plane without using an additional clamp.
[60] Also, a large load is not applied to the pressure fixing unit by the inclined plane formed at the inner circumference of the pressure fixing unit during initial fitting of the shield cover onto the connector housing. Consequently, the shield cover for the braided wire shield according to the embodiment of the present invention has the effect of achieving easy coupling of the shield cover to the connector housing and preventing breakage of the pressure fixing unit. In addition, the inclined plane receives entangled portions of the braided wire at the end thereof when the shield cover is completely fitted onto the connector housing, and therefore, the braided wire is securely presses by the fixing plane. Consequently, the shield cover for the braided wire shield according to the embodiment of the present invention has the effect of maintaining pressing force applied to the braided wire.
[61] Meanwhile, the convex parts formed at the vertical contact plane strongly press the braided wire against the corresponding end of the shield unit, and therefore, the braided wire is prevented from sliding and being separated from the vertical contact plane when the braided wire is pulled rearward. Consequently, the shield cover for the braided wire shield according to the embodiment of the present invention has the effect of achieving secure fixing of the braided wire. [62] Therefore, the present invention has industrial applicability.
[63] Although the preferred embodiment of the present invention has been disclosed for illustrative purposes, those skilled in the art will appreciate that various modifications, additions and substitutions are possible, without departing from the scope and spirit of the invention as disclosed in the accompanying claims.
[64]