JP5895541B2 - Cable clamp and cable clamp connection structure using the same - Google Patents

Description

  The present invention relates to a technique for electrically connecting a cable clamp having conductivity in the middle of a coaxial cable.

  As conventional cable clamps, for example, those shown in FIGS. 11 and 12 are known. As shown in FIG. 11, the cable clamp 500 grips the portion where the outer covering 11 of the coaxial cable 10 is partially removed to expose the outer conductor 12 with the shield barrel 501, and sandwiches the shield barrel portion 501. The coaxial cable 10 is connected to the coaxial cable 10 in a state where the outer sheath 11 is gripped by two jacket barrel portions 502 provided at positions away from each other in the direction of the axis 10c of the coaxial cable 10. Then, an electrical ground connection is made by connecting the portion of the cable clamp 500 to the connection portion 51 of the housing 50.

  Here, the process of connecting the cable clamp 500 to the coaxial cable 10 will be described with reference to FIG. As shown in FIG. 12 (a), two positions separated by a length L6 corresponding to the shield barrel 501 (see FIG. 12 (c)) of the cable clamp 500 along the axial center 10c direction of the coaxial cable 10. After the circumferential cut 11a is made in the outer covering 11, a longitudinal slit 11b parallel to the direction of the axis 10c is made in the outer covering 11 between the two cuts 11a.

  Next, when the outer covering 11 between the two cuts 11a is peeled off, as shown in FIG. 12B, the portion of the length L6 between the two cuts 11a is exposed. Thereafter, as shown in FIG. 12 (c), the outer periphery of the outer conductor 12a exposed between the two cuts 11a is gripped by the shield barrel 501 at the central portion of the cable clamp 500, and the outer portions on both sides thereof are gripped. When the outer periphery of the covering 11 is gripped by the jacket barrel portion 502, the connection of the cable clamp 500 to the coaxial cable 10 is completed.

  On the other hand, as the prior art related to the present invention, for example, there is “intermediate connection terminal for shield wire” described in Patent Document 1 or “pressure contact connector” described in Patent Document 2.

JP-A-4-269470 JP 2004-31217 A

  In the conventional cable clamp 500 shown in FIGS. 11 and 12 and the cable clamp connection structure 600 using the same, when the length L5 of the cable clamp 500 is changed due to a design requirement, the shield barrel 501 Since the length changes, when the cable clamp 500 is connected to the coaxial cable 10, the peel length L6 of the outer covering 11 must be changed accordingly. In particular, when the length L5 of the cable clamp 500 is increased, the length of the shield barrel portion 501 is increased, so that the peeling length L6 of the outer covering 11 of the coaxial cable 10 is also increased, as shown in FIG. It is necessary to lengthen the length of the vertical slit 11b.

  In general, a cutting technique using a laser beam is used in the peeling operation of the outer covering 11 of the coaxial cable 10. However, when the peeling length L6 of the outer covering 11 of the coaxial cable 10 is increased, the number of processing steps is increased, and the manufacturing process is increased. The efficiency is reduced. Such a problem cannot be solved even by using the techniques described in Patent Documents 1 and 2.

  The problem to be solved by the present invention is to provide a cable clamp that does not increase the number of man-hours for the connection process to the coaxial cable when the total length of the cable clamp is changed, and a cable clamp connection structure using the same.

Cable clamp of the present invention, there is provided a cable clamp formed by plastically deformable conductive material, and two shields barrel portion for gripping the outer conductor exposed by peeling off the outer jacket of the coaxial cable partly A jacket barrel portion that grips the outer sheath of the coaxial cable, and the shield barrel portion is disposed at two positions apart in the axial direction of the coaxial cable across the jacket barrel portion , The length of the jacket barrel portion in the axial direction is larger than the length of the shield barrel portion in the axial direction.

  With such a configuration, when the total length of the cable clamp is changed, it is possible to cope with the change by changing the length of the jacket barrel portion without changing the length of the shield barrel portion. It becomes unnecessary to change the peeling length of the outer coating of the coaxial cable. For this reason, when the total length of the cable clamp is changed, the number of man-hours for the connection process for the coaxial cable does not increase. The “length” and the “full length” mean the “length” and the “full length” in the axial direction of the coaxial cable (the same applies hereinafter).

In the cable clamp of the present invention, the shield barrel portion, are arranged at two positions apart in the axial direction of the coaxial cable across the jacket barrel portion.

  With such a configuration, the outer sheath of the coaxial cable can be gripped by the jacket barrel portion, and the exposed portions of the outer conductor formed at two positions on both sides thereof can be gripped by the shield barrel portions, respectively. Therefore, a strong connection structure is formed, and connection reliability is improved. Also, when the total length of the cable clamp is changed, it is possible to respond by changing the length of the jacket barrel part and changing the distance between the two shield barrel parts without changing the length of the shield barrel part. Therefore, it is not necessary to change the peeling length of the outer coating of the coaxial cable. For this reason, when the total length of the cable clamp is changed, the number of man-hours for the connection process for the coaxial cable does not increase.

  On the other hand, it is desirable that the length of the jacket barrel portion in the axial direction of the coaxial cable is larger than the sum of the lengths of the two shield barrel portions in the axial direction.

  With such a configuration, necessary conductivity can be ensured while maintaining a reliable connection state to the coaxial cable.

  Next, the cable clamp connection structure of the present invention is a connection structure between any one of the above-described cable clamps and a coaxial cable, and at least an external conductor exposed by partially peeling off the outer sheath of the coaxial cable. It is characterized in that it is held by one of the shield barrel parts and the outer sheath of the coaxial cable is held by the jacket barrel part.

  With such a configuration, when the total length of the cable clamp is changed, it is possible to cope with the change by changing the length of the jacket barrel portion without changing the length of the shield barrel portion. It becomes unnecessary to change the peeling length of the outer coating of the coaxial cable. For this reason, when the total length of a cable clamp is changed, the cable clamp connection structure which does not increase the man-hour of the connection process with respect to a coaxial cable can be provided.

  It is possible to provide a cable clamp that does not increase the number of man-hours for a connection process to a coaxial cable and a cable clamp connection structure using the same, when the total length of the cable clamp is changed.

It is a top view which shows the cable clamp which is embodiment of this invention. FIG. 2 is a front view of the cable clamp shown in FIG. It is a perspective view which shows the process of connecting the cable clamp shown in FIG. 1 to a coaxial cable. It is a perspective view which shows the cable clamp connection structure using the cable clamp shown in FIG. It is a front view of the cable clamp connection structure shown in FIG. It is sectional drawing in the AA of FIG. It is sectional drawing in the BB line of FIG. It is a schematic process drawing which shows the process of connecting the cable clamp shown in FIG. 1 to a coaxial cable. It is a perspective view which shows the cable clamp connection structure which is other embodiment of this invention. It is a front view of the cable clamp connection structure shown in FIG. It is a figure which shows the conventional cable clamp connection structure. It is a schematic process drawing which shows the process of connecting the conventional cable clamp to a coaxial cable.

  Hereinafter, based on FIGS. 1-8, the cable clamp 100 which is embodiment of this invention, and the cable clamp connection structure 200 using the same are demonstrated.

  As shown in FIGS. 1 to 3, the cable clamp 100 is formed by cutting and pressing a metal plate that is a plastically deformable conductive material, and partially covers the outer covering 11 of the coaxial cable 10. Two shield barrel portions 101 that grip the outer conductor 12 a that is peeled and exposed, and one jacket barrel portion 102 that grips the outer sheath 11 of the coaxial cable 10, along the axial center 10 c direction of the coaxial cable 10. They are arranged side by side. Specifically, the two shield barrel portions 101 are arranged at two positions separated in the direction of the axis 10 c of the coaxial cable 10 with the jacket barrel portion 102 interposed therebetween.

  As shown in FIGS. 1 and 2, in the cable clamp 100, the shield barrel portion 101 and the jacket barrel portion 102 having a substantially C-shaped cross section along the longitudinal direction of the substantially bowl-shaped main body portion 103 are the main body. It is formed integrally with the portion 103. The coaxial cable 10 includes a center conductor 14 that is coaxial with the axis 10 c, an inner sheath 13 that surrounds the outer periphery of the center conductor 14, an outer conductor 12 that surrounds the outer periphery of the inner sheath 13, and an outer periphery of the outer conductor 12. And an outer coating 11 to be formed.

  As shown in FIG. 3, the outer conductor 12 a exposed by partially peeling two positions apart in the axial center 10 c direction of the outer sheath 11 of the coaxial cable 10 is used as two shield barrels constituting the cable clamp 100. When the outer sheath 11 of the coaxial cable 10 positioned between the two shield barrel portions 101 is gripped by the jacket barrel portion 102 of the cable clamp 100, the shield clamp connection shown in FIGS. A structure 200 is formed.

  In the shield clamp connection structure 200, the outer sheath 11 of the coaxial cable 10 is gripped by the jacket barrel portion 102, and the exposed portions of the outer conductors 12a formed at two positions on both sides thereof are gripped by the shield barrel portion 101, respectively. Therefore, a strong connection structure is formed and connection reliability is also good.

  Also, as shown in FIG. 5, the length 102L of the coaxial cable 10 in the axial center 10c direction of the jacket barrel portion 102 of the cable clamp 100 is calculated from the sum of the lengths 101L of the two shield barrel portions 101 in the axial center 10c direction. It ’s big. For this reason, while maintaining the reliable connection state with respect to the coaxial cable 10, required electroconductivity can be ensured.

  Here, a connection process of the cable clamp 100 to the coaxial cable 10 will be described with reference to FIGS. As shown in FIG. 8 (a), the length 101L of the shield barrel 101 is attached to the outer sheath 11 at two positions separated according to the length 100L of the cable clamp 100 along the axial center 10c direction of the coaxial cable 10. Then, a pair of circumferential cuts 11A that are separated according to each other are made, and then a vertical slit 11B parallel to the direction of the axis 10c is made in the outer covering 11 between each pair of cuts 11A.

  Next, when the outer covering 11 between each pair of cuts 11A is peeled off, as shown in FIG. 8B, the outer conductor 12a in the portion of the length L2 between each pair of two cuts 11A is exposed. It will be in the state. Thereafter, as shown in FIG. 8C, the outer periphery of the outer covering 11 between the outer conductors 12a exposed at the two positions corresponding to the length L1 is gripped by the jacket barrel portion 102 of the cable clamp 100. At the same time, when the outer periphery of the outer conductor 12a exposed on both sides is gripped by the shield barrel 101 of the cable clamp 100, the connection of the cable clamp 100 to the coaxial cable 10 is completed, and the cable clamp connection structure 200 is formed. The

  On the other hand, when the length 100L of the cable clamp 100 shown in FIGS. 1 and 2 is changed, the length 102L of the jacket barrel portion 102 is changed without changing the length 101L of the shield barrel portion 101. This can be dealt with by changing the interval between the shield barrel portions 101. Therefore, when the length 101L of the cable clamp 100 is changed, the outer conductor 12a can be changed by changing the interval (corresponding to the length L1) of the exposed outer conductor 12a at the two positions shown in FIG. This can be handled without changing the length L2 of 12a.

  That is, when the length 100L of the cable clamp 100 is changed, the length L2 between the two cuts 11A can be handled by changing the length L1 shown in FIG. 8A. Therefore, it is not necessary to change the peeling length (corresponding to the length L2) by changing the length of the vertical slit 11B with respect to the outer sheath 11 of the coaxial cable 10. For this reason, the man-hour of the connection process with respect to the coaxial cable 10 does not increase when the length 100L of the cable clamp 100 is changed.

  Next, a cable clamp 300 and a cable clamp connection structure 400 using the same according to another embodiment of the present invention will be described with reference to FIGS. In addition, about the part which is common in the cable clamp 100 and the cable clamp connection structure 200 shown in FIGS. 1-8, the same code | symbol is attached | subjected and description is abbreviate | omitted.

  The cable clamp connection structure 400 shown in FIGS. 9 and 10 is formed by connecting the cable clamp 300 to the coaxial cable 10. Specifically, the outer periphery of the outer conductor 12a, which is partly peeled off and exposed from the outer sheath 11 of the coaxial cable 10, is gripped by the shield barrel portion 301 of the cable clamp 300 and the outer sheath of the portion adjacent to the outer conductor 12a. The cable clamp connection structure 400 is formed by gripping the outer periphery of 11 with the jacket barrel portion 302.

  The cable clamp 300 has a structure in which one of the two shield barrel portions 101 constituting the cable clamp 100 shown in FIGS. 1 and 2 is deleted. Further, the length 302L of the jacket barrel portion 302 in the axial center 10c direction is larger than the length of the shield barrel portion 301 in the axial center 10c direction (the length 101L of the shield barrel portion 101 in the axial center 10c direction shown in FIG. 2). It is said. Therefore, in the case of the cable clamp 300, the exposed outer conductor 12a can be connected to the coaxial cable 10 only by forming the exposed outer conductor 12a in one place of the coaxial cable 10. For this reason, compared with the cable clamp 100, a raw material can be reduced and the simplification of a connection process and a connection structure can be achieved.

  Further, when the length 300L of the cable clamp 300 is changed, it can be dealt with by changing the length 302L of the jacket barrel portion 302. Therefore, the number of man-hours increases due to the change of the length L2 of the exposed external conductor 12a. Will not be invited.

  In addition, embodiment mentioned above illustrates this invention, The cable clamp which concerns on this invention, and the cable clamp connection structure using the same are not limited to embodiment mentioned above.

  The present invention can be widely used in the industrial field of in-vehicle electronic / electrical equipment or other electronic / electrical equipment.

DESCRIPTION OF SYMBOLS 10 Coaxial cable 10c Axis 11 Outer coating 11A Cut 11B Vertical slit 12, 12a Outer conductor 13 Inner coating 14 Center conductor 100,300 Cable clamp 101,301 Shield barrel portion 102,302 Jacket barrel portion 103 Main body portion 200,400 Shield clamp Connection structure 100L, 300L, 101L, 102L, L1, L2 Length

Claims (3)

A cable clamp formed by plastically deformable conductive material, and two shields barrel portion for gripping the outer conductor exposed by peeling off the outer jacket of the coaxial cable part, the external covering of the coaxial cable A jacket barrel portion for holding the shield barrel portion, and the shield barrel portion is disposed at two positions separated in the axial direction of the coaxial cable across the jacket barrel portion, and the shaft of the jacket barrel portion A cable clamp characterized in that a length in a central direction is made larger than a length in the axial direction of the shield barrel portion. The axial length of the coaxial cable, the cable clamp according to claim 1, wherein greater than the sum of the axial length of the two said shield barrel portion of the jacket barrel portion. The connection structure between the cable clamp and the coaxial cable according to claim 1 or 2 , wherein an outer conductor exposed by partially peeling an outer sheath of the coaxial cable is gripped by at least one shield barrel portion, A cable clamp connection structure characterized in that an outer sheath of the coaxial cable is held by the jacket barrel portion.

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