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. This device has a retaining member provided on the sleeve that applies 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] Japanese Patent Application Publication No. 2019-21632 Summary of the Invention [Problem to be solved by the invention]

[0004] In the case of Patent Document 1, when assembling the outer conductor or folding back the outer conductor (braid), a force is applied to the sleeve in a direction that moves it closer to the sheath. This force may cause the sleeve to shift from its normal position and move closer to the sheath.

[0005] The connector of the present disclosure aims to prevent displacement of the sleeve. [Means for solving the problem]

[0006] The shield conductive path of the present disclosure includes: 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 the front end of the sheath; Equipped with The sleeve further includes a butt portion extending rearward in the axial direction from the rear end thereof and abutting against the front end of the sheath. [Effects of the Invention]

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

[0008] [Figure 1] FIG. 1 is a cross-sectional side view of a shielded conductive path. [Figure 2] FIG. 2 is a development view of the sleeve and the abutment portion. [Figure 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. [Figure 5] FIG. 5 is a partial development view of the first outer conductor. [Figure 6] FIG. 6 is a perspective view showing a sleeve according to another embodiment. [Figure 7] FIG. 7 is a perspective view showing a sleeve according to another embodiment. [Figure 8] FIG. 8 is a rear view showing a sleeve according to another embodiment. [Figure 9] FIG. 9 is a side view showing a sleeve according to another embodiment. DETAILED DESCRIPTION OF THE INVENTION

[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 includes: (1) A shielded electric wire includes a sheath surrounding a shield layer surrounding a core wire, and a sleeve disposed to surround the outer periphery of the shield layer extending forward in the axial direction of the shielded electric wire from the front end of the sheath. The shielded conductive path further includes a butt portion extending rearward in the axial direction from the 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 toward 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, which prevents the butt portion from slipping inside the sheath and makes it easier to maintain a state in which it abuts against the front end of the sheath.

[0011] (3) In (2), it is preferable that the rear end of the abutting portion be bent radially outward. This configuration prevents the abutting portion from slipping inside the sheath and maintains the abutting state against the front end of the sheath.

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

[0013] (5) In (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 properties of the shielded wire.

[0014] (6) In (2), when the abutting portion is viewed from the axial direction, the radius of curvature at the rear end of the abutting portion is preferably smaller than the radius of curvature of the sleeve. With this configuration, the shielding layer is not compressed, and the electrical characteristics of the shielded wire are not impaired.

[0015] (7) In any of (1) to (6), the shielded electric wire further includes an outer conductor 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 recessed portion that is recessed radially inward of the shielded electric wire is formed in the outer conductor in a portion surrounding the separation region formed between the sheath and the sleeve. The region in which the recessed portion is formed in the circumferential direction of the shielded electric wire preferably excludes the portion of the separation region where the butt portion is disposed. With this configuration, the outer conductor does not press against the butt portion, so the shield layer is not compressed, and the electrical characteristics of the shielded electric wire are not impaired.

[0016] [Details of the embodiments 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 that is an outer conductor, and a shield terminal 20 connected to the front end 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 shielding layer 13 made of a braided wire woven into a tubular shape is placed on the outer periphery of the insulating coating 12, and the outer periphery of the shielding layer 13 is surrounded by a sheath 14. In other words, the shielded electric wire 10 has a configuration in which the shielding layer 13 that surrounds the core wire 11 is surrounded by the sheath 14.

[0018] The shielded wire 10 is disposed with its axial direction oriented in 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 wire 10, the sheath 14 and the insulating coating 12 are removed, exposing the core wire 11 in front of the insulating coating 12. Behind the exposed core wire 11, the sheath 14 is removed, exposing the shield layer 13.

[0019] The sleeve 15 is formed into a cylindrical shape by pressing a conductive plate material such as metal. The abutment portion 15A is formed to extend 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. Note that the coupling 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-to-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 rearward 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, which is folded back rearward. The rear end of the sleeve 15 and the front end of the sheath 14 are spaced apart 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 has a cylindrical shape 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, recessed over the entire periphery. The reduced diameter portion 16A is disposed adjacent to and in front of the front end of the folded-back shielding layer 13. A recess 17 is formed in the portion of the first outer conductor 16 surrounding the separation region S, recessed radially inward of the shielded wire 10. The region in which the recess 17 is formed in the circumferential direction of the shielded wire 10 (hereinafter simply referred to as the circumferential direction) excludes 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 that houses the inner conductor 21, and a cylindrical second outer conductor 23 that surrounds the outer periphery of the dielectric 22. The axis of the second outer conductor 23 is coaxial with the axis 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, we will explain an example of the process for assembling the shielded conductive path 100. First, at the front end of the shielded 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 abutting 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 abutting portion 15A is brought into contact with the front end of the sheath 14 (see FIG. 1). This forms a separation region S 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 backward to cover the outer periphery of the sleeve 15 (see FIG. 1). When the shield layer 13 is folded backward, a backward force is applied from the shield layer 13 to the sleeve 15. However, because 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 portion of the circumferential portion 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 side by side 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 located within the area where the recess 17 is formed (see FIG. 5). The first outer conductor 16 is attached to the shielded wire 10 with a portion of the circumferential portion cut open. At this time, the position of the butt portion 15A in the circumferential direction is arranged so that it faces 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 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 (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 edges of the first outer conductor 16 butted together. Then, a shield terminal 20 is attached to the front end of the shielded electric wire 10, completing the shielded conductive path 100 (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 that surrounds a core wire 11, and a sleeve 15 that is disposed so as to surround the outer periphery of the shield layer 13 and extends forward in the axial direction of the shielded electric wire 10 from the front end of the sheath 14. The shielded conductive path 100 further includes a butting portion 15A that extends rearward in the axial direction from the rear end of the sleeve 15 and abuts against the front end of the sheath 14. With this configuration, even if a rearward external force is applied to the sleeve 15, the butting 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 butting 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 that surrounds 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 that is recessed radially inward of the shielded wire 10 is formed in a portion of the first outer conductor 16 that surrounds the 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 excludes 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 against the butt portion 15A, so the shield layer 13 is not compressed and the electrical properties 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 meanings equivalent to those of 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 in the radial direction of the shielded electric wire 10 may be larger than the dimension of the front end of the butt portion 115A. With 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, which prevents the butt portion 115A from slipping inside the sheath 14 and makes it easier to maintain the state in which it abuts against the front end of the sheath 14. Furthermore, the rear end of the butt portion 115A may be bent outward in the radial direction of the shielded electric wire 10. With this configuration, the effect of preventing the butt portion 115A from slipping inside the sheath 14 and maintaining the state in which it abuts against the front end of the sheath 14 is achieved. In this case, for example, it is conceivable to cut out a portion of 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 have a curved surface K that faces outward in the radial direction of the shielded wire 10, is folded back toward the front, and is then 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 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 in 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 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 first embodiment, 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 unfolded state. (5) Unlike the first embodiment, the sleeve may be a polygonal cylindrical shape. (6) Unlike the first embodiment, 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…Radius of curvature 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 the front end of the sheath; Equipped with The shielded conductive path further includes a butt portion extending rearward in the axial direction from the rear end of the sleeve and abutting against the front end of the sheath.

2. The shielded conductive path according to claim 1 , wherein a dimension of a rear end of the abutting portion in a radial direction of the shielded electric wire is larger than a dimension of a front end of the abutting portion.

3. The shielded conductive path according to claim 2 , wherein a rear end of the abutting portion is bent outward in the radial direction.

4. 3. The shielded conductive path according to claim 2, wherein a curved surface is formed at a rear end of the abutting portion, the curved surface being bent radially outward and forward and then curved rearward.

5. 3. The shielded conductive path according to claim 2, wherein a surface of the sleeve facing the 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.

6. The shielded conductive path according to claim 2 , wherein when the abutting portion is viewed from the axial direction, a radius of curvature at a rear end portion of the abutting portion is smaller than a radius of curvature of the sleeve.

7. 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 recessed portion that is recessed inward in the radial direction of the shielded electric wire is formed in a portion of the outer conductor that surrounds a separation region formed between the sheath and the sleeve, The shielded conductive path according to claim 1 , wherein a region where the recess is formed in the circumferential direction of the shielded electric wire is a region excluding a portion of the separation region where the abutting portion is arranged.

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