Shielded 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] This disclosure relates to a shield conductive path.

Background Art

[0002] Patent Document 1 discloses a connector device in which a sleeve is arranged at a position axially spaced from a sheath. This has a function in which a holding member provided on the sleeve applies a force acting radially inward to the cable. That is, the position of the sleeve is held in the axial direction of the cable by bending the holding member radially inward.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] ]> In the device of Patent Document 1, when assembling the outer conductor or folding back the external conductor (braid), etc., a force in a direction approaching the sheath with respect to the sleeve is applied. Due to this force, there is a concern that the position of the sleeve may shift closer to the sheath from the normal position.

[0005] The connector of this disclosure aims to prevent displacement of the sleeve.

Means for Solving the Problems

[0006] The shield conductive path of this disclosure is a shielded electric wire in which a shield layer surrounding a core wire is surrounded by a sheath, and a sleeve arranged to surround the outer periphery of the shield layer extending axially forward from the front end of the sheath in the axial direction of the shielded electric wire, and includes The sleeve further comprises a buttock portion extending axially backward from the rear end of the sleeve and contacting the front end of the sheath. [Effects of the Invention]

[0007] According to this disclosure, misalignment of the sleeve can be prevented. [Brief explanation of the drawing]

[0008] [Figure 1] Figure 1 is a side cross-sectional view of the shielded conductive path. [Figure 2] Figure 2 is an exploded view of the sleeve and the abutment section. [Figure 3] Figure 3 is a cross-sectional view of AA in Figure 1. [Figure 4] Figure 4 corresponds to the AA cross-sectional view in Figure 1 and shows the state before the rear part of the first outer conductor is crimped. [Figure 5] Figure 5 is a partially unfolded view of the first outer conductor. [Figure 6] Figure 6 is a perspective view showing a sleeve in another embodiment. [Figure 7] Figure 7 is a perspective view showing a sleeve in another embodiment. [Figure 8] Figure 8 is a rear view showing a sleeve in another embodiment. [Figure 9] Figure 9 is a side view showing a sleeve in another embodiment. [Modes for carrying out the invention]

[0009] [Description of Embodiments in this Disclosure] First, embodiments of this disclosure will be listed and described. The shielded conductive path of this disclosure is (1) The shielded wire comprises a shield layer surrounding a core wire, which is then surrounded by a sheath, and a sleeve positioned to surround the outer circumference of the shield layer extending forward in the axial direction of the shielded wire from the front end of the sheath. The shielded conductive path further includes a butt portion that extends backward in the axial direction from the rear end of the sleeve and abuts against the front end of the sheath. With this configuration, even if an external force is applied to the sleeve in a backward direction, the butt portion reliably prevents the sleeve from shifting toward the sheath.

[0010] (2) In (1), it is preferable that the dimension of the rear end of the abutment portion is larger than the dimension of the front end of the abutment portion in the radial direction of the shielded wire. With this configuration, since the dimension of the rear end of the abutment portion is larger than the dimension of the front end of the abutment portion, it is easier to prevent the abutment portion from slipping inside the sheath and to maintain a state of contact with the front end of the sheath.

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

[0012] In (4)(2), it is preferable that the rear end of the abutment portion has a curved surface that is radially outward and folded back forward, and curved backward. 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 (5)(2), it is preferable that the surface of the sleeve facing the outer circumference of the shield layer and the surface of the abutment portion facing the outer circumference of the shield layer are flush with each other in the axial direction. With this configuration, the shield layer is not compressed, and therefore the electrical characteristics of the shielded wire are not impaired.

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

[0015] (7) In (1) to (6), it further includes an outer conductor that surrounds the outer periphery of the front end portion of the sheath, the outer periphery of the sleeve, and the outer periphery of the abutting portion. Among the outer conductors, a recess that is recessed radially inward of the shielded electric wire is formed in a portion that surrounds the separation region formed between the sheath and the sleeve. The formation region of the recess in the circumferential direction of the shielded electric wire is preferably a region excluding the arrangement portion of the abutting portion in the separation region. According to this configuration, since the outer conductor does not press the abutting portion, it is not necessary to compress the shielding layer, and the electrical characteristics of the shielded electric wire are not impaired.

[0016] [Details of Embodiments of the Present Disclosure] [Embodiment 1] Embodiment 1 embodying the present disclosure will be described with reference to FIGS. 1 to 5. In the figures, "front side" and "rear side" are represented by "F" and "B", respectively.

[0017] As shown in FIG. 1, the shielded conductive path 100 includes a shielded electric wire 10, a sleeve 15 externally fitted to the shielded electric wire 10, an abutting portion 15A, a first outer conductor 16 that 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 shielding layer 13 formed by a braided wire braided in a cylindrical shape around the outer periphery of the insulating coating 12 is overlaid, and the outer periphery of the shielding layer 13 is surrounded by a sheath 14. That is, the shielded electric wire 10 has a configuration in which the shielding layer 13 surrounding the core wire 11 is surrounded by the sheath 14.

[0018] The shielded wire 10 is positioned with its axial direction oriented in the front-to-back direction. In the following description, the front-to-back direction and the axial direction are used interchangeably. At the front end of the shielded 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 press-forming a conductive plate material such as metal. The abutment portion 15A is formed extending backward from the rear end edge of the sleeve 15. As shown in Figure 2, the abutment portion 15A is formed in the center of the width direction at the rear end edge of the sleeve 15 when it is unfolded. It is preferable that the carrier connection position on the sleeve 15 be located at either the front end edge 15B of the sleeve 15 or the rear end edge 15C of the abutment portion 15A.

[0020] As shown in Figure 1, the surface F1 of the sleeve 15 facing the outer circumference of the shield layer 13 and the surface F2 of the abutment portion 15A facing the outer circumference of the shield layer 13 are flush with each other in the front-to-back direction (axial direction). The sleeve 15 is positioned to surround the outer circumference of the shield layer 13 that extends axially forward of the shielded wire 10. The abutment portion 15A extends axially backward from the rear end of the sleeve 15. The rear end of the abutment portion 15A abuts against the front end of the sheath 14. The outer circumference of the sleeve 15 is covered by the front end of the shield layer 13 which is folded back to the rear. The rear end of the sleeve 15 and the front end of the sheath 14 are spaced apart in the axial direction by the abutment 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 positioned to surround the outer circumference of the insulating coating 12, the outer circumference of the front end of the sheath 14, the outer circumference of the sleeve 15, and the outer circumference of the abutment portion 15A. A recessed diameter portion 16A is formed around the entire front of the first outer conductor 16. The diameter reduction portion 16A is positioned adjacent to the front of the front end of the folded shield layer 13. In the portion of the first outer conductor 16 that surrounds the separation region S, a recessed portion 17 is formed that is recessed radially inward of the shield wire 10. The region where the recessed portion 17 is formed in the circumferential direction of the shield wire 10 (hereinafter also simply referred to as the circumferential direction) is the region excluding the area where the abutment portion 15A is located in the separation region S (see Figure 3).

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

[0023] Next, an example of the assembly process for the shielded conductive circuit 100 will be described. First, at the front end of the shielded wire 10, the sheath 14 and insulating coating 12 are removed so that the core wire 11 is exposed in front of the insulating coating 12. Then, behind the exposed core wire 11, the sheath 14 is removed so that the shielding layer 13 is exposed.

[0024] Next, the sleeve 15 is attached. Specifically, the sleeve 15 is positioned so that the abutment portion 15A protrudes backward. The sleeve 15 is then positioned to surround the outer circumference of the shield layer 13. At this time, the rear end of the abutment portion 15A is brought into contact with the front end of the sheath 14 (see Figure 1). This creates a separation region S between the rear end of the sleeve 15 and the front end of the sheath 14 (see Figure 1).

[0025] Next, the shield layer 13 located in front of the sleeve 15 is folded backward to cover the outer circumference of the sleeve 15 (see Figure 1). When the shield layer 13 is folded backward, a backward force is applied to the sleeve 15 from the shield layer 13. However, since the rear end of the abutment portion 15A is in contact with 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 Figure 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 it in the circumferential direction is cut open. A locking piece 16B extending in the tangential direction is provided on one of the cut-open edges of the first outer conductor 16. A locking portion 16C that is 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 Figure 5). A through hole 16D penetrating in the thickness direction is formed on the other cut-open edge of the first outer conductor 16. The through hole 16D is located within the formation range of the recess 17 (see Figure 5). The first outer conductor 16 is attached to the shielded wire 10 with a portion of it in the circumferential direction cut open. At this time, the position of the abutment portion 15A in the circumferential direction is positioned to face the area where the recess 17 is not formed. Along with this, the tip of the shield wire 10 is inserted until the front end of the folded shield layer 13 is adjacent to the rear end of the reduced diameter section 16A (see Figure 1).

[0027] Next, the first outer conductor 16 is crimped. By crimping the first outer conductor 16, the opened edges of the first outer conductor 16 are brought together. Then, the locking piece 16B plastically deforms in a direction along the circumferential direction of the shield wire 10, and the locking portion 16C enters the through hole 16D from the outer circumference side (see Figure 3). In this way, the locking portion 16C is locked into the through hole 16D (see Figure 3). As a result, the opened edges of the first outer conductor 16 are held together in a butted state. Then, the shield terminal 20 is attached to the front end of the shield wire 10, and the shield conductive path 100 is completed (see Figure 1).

[0028] Next, the operation of Embodiment 1 will be described.

[0029] The shielded conductive path 100 comprises a shielded wire 10 in which a shield layer 13 surrounding a core wire 11 is surrounded by a sheath 14, and a sleeve 15 positioned to surround the outer circumference of the shield layer 13 extending axially forward from the front end of the sheath 14. The shielded conductive path 100 further includes a butt portion 15A extending axially backward from the rear end of the sleeve 15 and abutting against the front end of the sheath 14. With this configuration, even if an external force is applied to the sleeve 15 in a backward direction, the butt portion 15A reliably prevents the sleeve 15 from shifting toward the sheath 14.

[0030] The surface F1 of the sleeve 15 facing the outer circumference of the shield layer 13 and the surface F2 of the abutment portion 15A facing the outer circumference 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 therefore the electrical characteristics of the shielded wire 10 are not impaired.

[0031] The shield wire 10 further comprises a first outer conductor 16 that surrounds the outer circumference of the front end of the sheath 14, the outer circumference of the sleeve 15, and the outer circumference of the abutment portion 15A. Of the first outer conductor 16, a recess 17 is formed in the portion surrounding the separation region S formed between the sheath 14 and the sleeve 15, which is recessed radially inward from the shield wire 10. The region in which the recess 17 is formed in the circumferential direction of the shield wire 10 is the region excluding the portion of the separation region S where the abutment portion 15A is located. With this configuration, the abutment portion 15A is not pressed by the first outer conductor 16, so the shield layer 13 is not compressed, and the electrical characteristics of the shield wire 10 are not impaired.

[0032] <Other Embodiments> This disclosure is not limited to Embodiment 1 described above in the description and drawings. The present invention includes the meaning of equivalents of the claims and all modifications within the claims, and is intended to include embodiments such as those described below. (1) As shown in Figure 6, in the radial direction of the shielded wire 10, the dimension of the rear end of the abutment portion 115A may be larger than the dimension of the front end of the abutment portion 115A. With this configuration, since the dimension of the rear end of the abutment portion 115A is larger than the dimension of the front end of the abutment portion 115A, it is easier to prevent the abutment portion 115A from slipping inside the sheath 14 and to maintain contact with the front end of the sheath 14. In addition, the rear end of the abutment portion 115A may be bent radially outward of the shielded wire 10. With this configuration, the effect is to prevent the abutment portion 115A from slipping inside the sheath 14 and to maintain contact with the front end of the sheath 14. In this case, for example, it is conceivable to cut out the first outer conductor 16 located at the rear end of the abutment portion 115A so as not to interfere with the rear end of the abutment portion 115A. (2) As shown in Figure 7, a curved surface K may be formed at the rear end of the abutment portion 215A, which is folded back radially outward and forward on the shield wire 10 and curved backward. With this configuration, the rear end of the abutment 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 shield wire 10, the dimensions of the rear end of the abutment portion 215A are larger than the dimensions of the front end of the abutment portion 215A. (3) As shown in Figure 8, when the abutment portion 315A is viewed from the axial direction, the radius of curvature R1 at the rear end of the abutment portion 315A may be smaller than the radius of curvature R2 of the sleeve 15. Specifically, as shown in Figure 9, the radius of curvature at the front end of the abutment portion 315A is the same as the radius of curvature R1 of the sleeve 15, and the radius of curvature gradually decreases towards the rear end. With this configuration, the shield layer 13 is not compressed, and the electrical characteristics of the shielded wire 10 are not impaired. In the radial direction of the shielded wire 10, the dimensions of the rear end of the abutment portion 315A are larger than the dimensions of the front end of the abutment portion 315A. (4) Unlike Embodiment 1 above, multiple abutment portions may be provided. Alternatively, abutment portions may be placed at the widthwise end of the rear edge of the sleeve when it is unfolded. (5) Unlike Embodiment 1 above, the sleeve may be a cylindrical shape with a polygonal form. (6) Unlike Embodiment 1 above, a bead extending in the front-rear direction from the rear of the sleeve to the front of the abutment portion may be formed. The direction of the bead protrusion is preferably radially outward. [Explanation of Symbols]

[0033] 10...Shielded power lines 11…Core wire 12...Insulating coating 13...Shield layer 14…Sheath 15... Sleeves 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… Dielectrics 23...Second outer conductor 100... Shielded conductive path K...Curved surface R1,R2…curvature radius S…Separation area

Claims

1. A shielded wire consists of a shield layer surrounding the core wire, and a sheath surrounding that shield layer. A sleeve is positioned to surround the outer circumference of the shield layer extending axially forward from the front end of the sheath, Equipped with, The sleeve is provided with a protruding abutment portion extending backward in the axial direction from the rear end, In the aforementioned axial direction, the rear end of the abutment portion abuts directly against the front end of the sheath. The members constituting the sleeve and the abutment portion are arranged in a straight line in the axial direction. A shielded conductive path in which the rear end of the sleeve and the front end of the sheath are spaced apart in the axial direction by the abutment portion.

2. A shielded electric wire comprising a shield layer surrounding a core wire, and a sheath surrounding the shield layer, A sleeve is positioned to surround the outer circumference of the shield layer extending axially forward from the front end of the sheath, Equipped with, The sleeve is provided with a protruding abutment portion extending backward in the axial direction from the rear end, The rear end of the abutment portion is in contact with the front end of the sheath. The rear end of the sleeve and the front end of the sheath are spaced apart in the axial direction by the abutment portion. A shielded conductive path in which, in the radial direction of the shielded wire, the dimension of the rear end of the abutment portion is larger than the dimension of the front end of the abutment portion.

3. The shield conductive path according to claim 2, wherein the rear end of the abutment portion is bent radially outward.

4. The shielded conductive path according to claim 2, wherein the rear end of the abutment portion has a curved surface formed that is radially outward and forward-facing, and then curved backward.

5. The shielded conductive path according to claim 2, wherein the surface of the sleeve facing the outer circumference of the shield layer and the surface of the abutment portion facing the outer circumference of the shield layer are flush with each other in the axial direction.

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

7. The outer conductor further comprises the outer circumference of the front end of the sheath, the outer circumference of the sleeve, and the outer circumference of the abutment portion, Of the outer conductor, the portion surrounding the separated region formed between the sheath and the sleeve has a recess formed in the radial direction inward of the shield wire. The shielded conductive path according to any one of claims 1 to 6, wherein the region where the recess is formed in the circumferential direction of the shielded wire is the region excluding the portion where the abutment portion is located in the separated region.

Images