Shield Conductive Path

Abstract

To prevent sleeve misalignment.SOLUTION: A shield conductive path 100 includes a shield wire 10 in which a sheath 14 surrounds a shield layer 13 surrounding a core wire 11, and a sleeve 15 that is arranged to surround the outer periphery of the shield layer 13 extending forward in the axial direction of the shield wire 10 from the front end of the sheath 14, and further includes an abutment portion 15A that extends rearward in the axial direction from the rear end of the sleeve 15 and abuts the front end of the sheath 14.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present disclosure relates to a shielded conductive path. [Background technology]

[0002] Patent Document 1 discloses a connector device in which a sleeve is disposed at a position axially spaced from a sheath. In this device, a retaining member provided on the sleeve has a function of applying a force acting radially inward to the cable. In other words, the position of the sleeve is maintained in the axial direction of the cable by bending the retaining member radially inward. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2019-21632 A Summary of the Invention [Problem to be solved by the invention]

[0004] In the case of Patent Document 1, when the outer conductor is assembled, when the outer conductor (braid) is folded back, etc., a force is applied to the sleeve in a direction approaching the sheath. There is a concern that this force may cause the position of the sleeve to shift from the correct position toward the sheath.

[0005] The connector of the present disclosure aims to prevent the sleeve from shifting out of position. [Means for solving the problem]

[0006] The shield conductive path of the present disclosure is A shielded wire in which a shield layer surrounding a core wire is surrounded by a sheath; a sleeve disposed to surround an outer periphery of the shield layer extending forward in the axial direction of the shielded electric wire from a front end of the sheath; Equipped with The sleeve further includes a butt portion extending rearward in the axial direction from a rear end thereof and abutting against a front end of the sheath. Effect of the Invention

[0007] According to the present disclosure, it is possible to prevent the sleeve from shifting out of position. [Brief description of the drawings]

[0008] [Figure 1] FIG. 1 is a cross-sectional side view of a shielded conductive path. [Diagram 2] FIG. 2 is a development view of the sleeve and the abutment portion. [Diagram 3] FIG. 3 is a cross-sectional view taken along line AA in FIG. [Figure 4] FIG. 4 corresponds to a cross-sectional view taken along line AA in FIG. 1, and shows the state before the rear portion of the first outer conductor is crimped. [Diagram 5] FIG. 5 is a partial development view of the first outer conductor. [Figure 6] FIG. 6 is a perspective view showing a sleeve in another embodiment. [Figure 7] FIG. 7 is a perspective view showing a sleeve in another embodiment. [Figure 8] FIG. 8 is a rear view showing a sleeve in another embodiment. [Figure 9] FIG. 9 is a side view showing a sleeve in another embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] [Description of the embodiments of the present disclosure] First, embodiments of the present disclosure will be listed and described. The shield conductive path of the present disclosure is (1) A shielded electric wire includes a sheath surrounding a shield layer surrounding a core wire, and a sleeve arranged to surround an outer periphery of the shield layer extending forward in the axial direction of the shielded electric wire from a front end of the sheath. The shielded conductive path further includes a butt portion extending backward in the axial direction from a rear end of the sleeve and abutting against the front end of the sheath. With this configuration, even if a rearward external force is applied to the sleeve, the butt portion can reliably prevent the sleeve from shifting in a direction approaching the sheath.

[0010] (2) In (1), it is preferable that the dimension of the rear end of the butt portion in the radial direction of the shielded electric wire is larger than the dimension of the front end of the butt portion. With this configuration, the dimension of the rear end of the butt portion is larger than the dimension of the front end of the butt portion, so that the butt portion is prevented from slipping inside the sheath and can be easily maintained in contact with the front end of the sheath.

[0011] (3) In (2), it is preferable that the rear end of the abutment portion is bent radially outward. This configuration can prevent the abutment portion from slipping inside the sheath and can maintain a state in which the abutment portion abuts against the front end of the sheath.

[0012] (4) In (2), it is preferable that the rear end of the abutment portion has a curved surface that is bent radially outward and forward and then curved rearward. With this configuration, the abutment portion can be brought into contact with the front end of the sheath without damaging the front end of the sheath.

[0013] In the above-mentioned configuration (5) (2), it is preferable that the surface of the sleeve facing the outer periphery of the shield layer and the surface of the butt portion facing the outer periphery of the shield layer are flush with each other in the axial direction. This configuration does not compress the shield layer, and therefore does not impair the electrical characteristics of the shielded wire.

[0014] In the above-mentioned configuration, when the butt portion is viewed from the axial direction, the radius of curvature of the rear end portion of the butt portion is preferably smaller than the radius of curvature of the sleeve. With this configuration, the shield layer is not compressed, and therefore the electrical characteristics of the shielded wire are not impaired.

[0015] (7) In any of (1) to (6), an outer conductor is further provided surrounding the outer periphery of the front end of the sheath, the outer periphery of the sleeve, and the outer periphery of the butt portion. A recess is formed in the outer conductor in a portion surrounding the separation region formed between the sheath and the sleeve, recessed radially inwardly of the shielded electric wire. It is preferable that the region in which the recess is formed in the circumferential direction of the shielded electric wire is a region excluding the portion of the separation region where the butt portion is disposed. With this configuration, the outer conductor does not press the butt portion, so there is no need to compress the shield layer, and the electrical characteristics of the shielded electric wire are not impaired.

[0016] [Details of the embodiment of the present disclosure] [Embodiment 1] A first embodiment of the present disclosure will be described with reference to Figures 1 to 5. In the figures, the "front side" and the "rear side" are represented by "F" and "B", respectively.

[0017] 1, the shielded conductive path 100 includes a shielded electric wire 10, a sleeve 15 fitted onto the shielded electric wire 10, a butt portion 15A, a first outer conductor 16 which is an outer conductor, and a shield terminal 20 connected to the front end portion of the shielded electric wire 10. The shielded electric wire 10 has a configuration in which a core wire 11 is surrounded by an insulating coating 12, a shield layer 13 made of a braided wire woven into a cylindrical shape is laid on the outer periphery of the insulating coating 12, and the outer periphery of the shield layer 13 is surrounded by a sheath 14. In other words, the shielded electric wire 10 has a configuration in which the shield layer 13 surrounding the core wire 11 is surrounded by the sheath 14.

[0018] The shielded electric wire 10 is disposed with its axial direction facing the front-rear direction. In the following description, the front-rear direction and the axial direction are used synonymously. At the front end of the shielded electric wire 10, the sheath 14 and the insulating coating 12 are removed, and the core wire 11 is exposed in front of the insulating coating 12. Behind the exposed core wire 11, the sheath 14 is removed, and the shield layer 13 is exposed.

[0019] The sleeve 15 is formed into a cylindrical shape by pressing a conductive plate material such as a metal. The abutment portion 15A is formed extending rearward from the rear end edge of the sleeve 15. As shown in Fig. 2, the abutment portion 15A is formed in the center in the width direction of the rear end edge of the sleeve 15 in the unfolded state. The connection position of the carrier in the sleeve 15 is preferably located either at the front end edge 15B of the sleeve 15 or at the rear end edge 15C of the abutment portion 15A.

[0020] As shown in FIG. 1, a surface F1 of the sleeve 15 facing the outer periphery of the shield layer 13 and a surface F2 of the butt portion 15A facing the outer periphery of the shield layer 13 are flush with each other in the front-rear direction (axial direction). The sleeve 15 is disposed to surround the outer periphery of the shield layer 13 extending forward in the axial direction of the shielded electric wire 10. The butt portion 15A extends backward in the axial direction from the rear end of the sleeve 15. The rear end of the butt portion 15A abuts against the front end of the sheath 14. The outer periphery of the sleeve 15 is covered by the front end of the shield layer 13 folded back backward. The rear end of the sleeve 15 and the front end of the sheath 14 are separated in the axial direction by the butt portion 15A. A separation region S is formed between the rear end of the sleeve 15 and the front end of the sheath 14.

[0021] The first outer conductor 16 is cylindrical and extends in the front-rear direction. The first outer conductor 16 is disposed so as to surround the outer periphery of the insulating coating 12, the outer periphery of the front end of the sheath 14, the outer periphery of the sleeve 15, and the outer periphery of the butt portion 15A. A reduced diameter portion 16A is formed in the front portion of the first outer conductor 16, which is recessed over the entire circumference. The reduced diameter portion 16A is disposed adjacent to the front end of the folded back shield layer 13. A recess 17 is formed in a portion of the first outer conductor 16 surrounding the separation region S, which is recessed radially inwardly of the shielded electric wire 10. The region in which the recess 17 is formed in the circumferential direction of the shielded electric wire 10 (hereinafter also simply referred to as the circumferential direction) is a region excluding the portion in the separation region S where the butt portion 15A is disposed (see FIG. 3).

[0022] The shield terminal 20 includes an inner conductor 21 connected to the front end of the core wire 11, a dielectric 22 housing the inner conductor 21, and a cylindrical second outer conductor 23 surrounding the outer periphery of the dielectric 22. The axial direction of the second outer conductor 23 is coaxial with the axial direction of the shielded electric wire 10 and faces the front-rear direction. The rear end of the second outer conductor 23 is fitted onto the front end of the first outer conductor 16 and is connected to the first outer conductor 16 by spot welding or the like.

[0023] Next, a description will be given of an example of a process for assembling the shielded conductive path 100. First, at the front end of the shielded electric wire 10, the sheath 14 and the insulating coating 12 are removed to expose the core wire 11 in front of the insulating coating 12. Then, behind the exposed core wire 11, the sheath 14 is removed to expose the shield layer 13.

[0024] Next, the sleeve 15 is attached. Specifically, the sleeve 15 is oriented so that the butt portion 15A protrudes rearward. The sleeve 15 is then positioned so as to surround the outer periphery of the shield layer 13. At this time, the rear end of the butt portion 15A is brought into contact with the front end of the sheath 14 (see FIG. 1). As a result, a separation region S is formed between the rear end of the sleeve 15 and the front end of the sheath 14 (see FIG. 1).

[0025] Next, the shield layer 13 located in front of the sleeve 15 is folded back backward to cover the outer periphery of the sleeve 15 (see FIG. 1). When the shield layer 13 is folded back backward, a rearward force is applied from the shield layer 13 to the sleeve 15. However, since the rear end of the abutting portion 15A abuts against the front end of the sheath 14, the position of the sleeve 15 does not shift backward.

[0026] Next, the first outer conductor 16 is attached. As shown in FIG. 4, a recess 17 is formed in advance on the rear side of the first outer conductor 16 before it is crimped, and a part of the circumferential direction is cut open. A locking piece 16B extending in the tangential direction is provided on one cut-open edge of the first outer conductor 16. A locking portion 16C folded inward is provided at the tip of the locking piece 16B. The locking pieces 16B are arranged in a direction perpendicular to the front-rear direction with respect to the recess 17 (see FIG. 5). A through hole 16D penetrating in the plate thickness direction is formed on the other cut-open edge of the first outer conductor 16. The through hole 16D is arranged within the range where the recess 17 is formed (see FIG. 5). The first outer conductor 16 is attached to the shielded wire 10 with a part of the circumferential direction cut open. At this time, the position of the abutting portion 15A in the circumferential direction is arranged so as to face an area where the recess 17 is not formed. At the same time, the front end of the shielded electric wire 10 is inserted until the front end of the folded back shield layer 13 is adjacent to the rear end of the reduced diameter portion 16A (see FIG. 1).

[0027] Next, the first outer conductor 16 is crimped. By crimping the first outer conductor 16, the cut-open end edges of the first outer conductor 16 are butted together. Then, the locking pieces 16B are plastically deformed in a direction along the circumferential direction of the shielded electric wire 10, and the locking portions 16C enter the through holes 16D from the outer periphery side (see FIG. 3). In this way, the locking portions 16C are locked in the through holes 16D (see FIG. 3). This keeps the cut-open end edges of the first outer conductor 16 in a butted state. Then, a shield terminal 20 is attached to the front end of the shielded electric wire 10, and the shielded conductive path 100 is completed (see FIG. 1).

[0028] Next, the operation of the first embodiment will be described.

[0029] The shielded conductive path 100 includes a shielded electric wire 10 in which a sheath 14 surrounds a shield layer 13 surrounding a core wire 11, and a sleeve 15 disposed to surround the outer periphery of the shield layer 13 extending forward in the axial direction of the shielded electric wire 10 from a front end of the sheath 14. The shielded conductive path 100 further includes a butt portion 15A extending backward in the axial direction from a rear end of the sleeve 15 and abutting against the front end of the sheath 14. With this configuration, even if a rearward external force is applied to the sleeve 15, the butt portion 15A can reliably prevent the sleeve 15 from shifting in a direction approaching the sheath 14.

[0030] A surface F1 of the sleeve 15 facing the outer periphery of the shield layer 13 and a surface F2 of the butt portion 15A facing the outer periphery of the shield layer 13 are flush with each other in the axial direction. With this configuration, the shield layer 13 is not compressed, and the electrical characteristics of the shielded wire 10 are not impaired.

[0031] The shielded wire 10 further includes a first outer conductor 16 surrounding the outer periphery of the front end of the sheath 14, the outer periphery of the sleeve 15, and the outer periphery of the butt portion 15A. A recess 17 recessed radially inwardly of the shielded wire 10 is formed in a portion of the first outer conductor 16 surrounding a separation region S formed between the sheath 14 and the sleeve 15. The region in the circumferential direction of the shielded wire 10 where the recess 17 is formed is a region excluding the portion of the separation region S where the butt portion 15A is disposed. With this configuration, the first outer conductor 16 does not press the butt portion 15A, and therefore the shield layer 13 is not compressed, and the electrical characteristics of the shielded wire 10 are not impaired.

[0032] <Other embodiments> The present disclosure is not limited to the first embodiment described above and illustrated in the drawings. The present invention includes all modifications within the scope of the claims and the meaning equivalent to the claims, and is intended to include the following embodiments. (1) As shown in FIG. 6, the dimension of the rear end of the butt portion 115A may be larger than the dimension of the front end of the butt portion 115A in the radial direction of the shielded electric wire 10. According to this configuration, the dimension of the rear end of the butt portion 115A is larger than the dimension of the front end of the butt portion 115A, so that the butt portion 115A is prevented from slipping inside the sheath 14 and is easily kept in contact with the front end of the sheath 14. In addition, the rear end of the butt portion 115A may be bent outward in the radial direction of the shielded electric wire 10. According to this configuration, the effect of preventing the butt portion 115A from slipping inside the sheath 14 and keeping the butt portion 115A in contact with the front end of the sheath 14 is achieved. In this case, for example, it is conceivable to cut out the first outer conductor 16 located at the rear end of the butt portion 115A so as not to interfere with the rear end of the butt portion 115A. (2) As shown in Fig. 7, the rear end of the butt portion 215A may be formed with a curved surface K that faces outward in the radial direction of the shielded electric wire 10, is folded back toward the front, and is curved toward the rear. With this configuration, the rear end of the butt portion 215A can be brought into contact with the front end of the sheath 14 without damaging the front end of the sheath 14. In the radial direction of the shielded electric wire 10, the dimension of the rear end of the butt portion 215A is larger than the dimension of the front end of the butt portion 215A. (3) As shown in Fig. 8, when the butt portion 315A is viewed from the axial direction, the radius of curvature R1 at the rear end of the butt portion 315A may be smaller than the radius of curvature R2 of the sleeve 15. Specifically, as shown in Fig. 9, the radius of curvature at the front end of the butt portion 315A is set to the same radius of curvature R1 as that of the sleeve 15, and the radius of curvature gradually decreases toward the rear end. With this configuration, the shield layer 13 is not compressed, and the electrical characteristics of the shielded electric wire 10 are not impaired. In the radial direction of the shielded electric wire 10, the dimension of the rear end of the butt portion 315A is larger than the dimension of the front end of the butt portion 315A. (4) Unlike the above-described embodiment 1, a plurality of abutment portions may be provided. Also, the abutment portions may be disposed at the widthwise ends of the rear end edge of the sleeve in the deployed state. (5) Unlike the first embodiment, the sleeve may be formed in a polygonal cylindrical shape. (6) Unlike the above-described embodiment 1, a bead extending in the front-rear direction may be formed from the rear of the sleeve to the front of the abutment portion. The protruding direction of the bead is preferably radially outward. [Explanation of symbols]

[0033] 10...Shielded wire 11...Core wire 12...Insulating coating 13…Shield layer 14…Sheath 15...Sleeve 15A, 115A, 215A, 315A…Abutment part 15B…Front edge 15C…Rear edge 16...First outer conductor (outer conductor) 16A…Reduced diameter part 16B…Locking piece 16C…Locking part 16D…Through hole 17…Recess 20...Shield terminal 21…Inner conductor 22...Dielectric 23...Second outer conductor 100...Shielded conductive path K...Curved surface R1,R2…curvature radius S…Separation area

Claims

1. A shielded wire in which a shield layer surrounding a core wire is surrounded by a sheath; a sleeve disposed to surround an outer periphery of the shield layer extending forward in the axial direction of the shielded electric wire from a front end of the sheath; Equipped with a butt portion extending rearward in the axial direction from a rear end of the sleeve and abutting against a front end of the sheath, A shielded conductive path in which a surface of the sleeve facing an outer periphery of the shielding layer and a surface of the abutting portion facing the outer periphery of the shielding layer are flush with each other in the axial direction.

2. an outer conductor surrounding an outer periphery of the front end of the sheath, an outer periphery of the sleeve, and an outer periphery of the butt portion; a recess that is recessed inward in a radial direction of the shielded wire is formed in a portion of the outer conductor that surrounds a spaced region formed between the sheath and the sleeve, The shielded conductive path according to claim 1 , wherein a region in the circumferential direction of the shielded electric wire where the recess is formed is a region excluding a portion in the spaced region where the abutting portion is disposed.

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