Wire harness

Abstract

The present invention aims to simplify the shape of a shield terminal.　This wire harness (W) comprises: a plurality of shielded electric wires (25) arranged in parallel; a plurality of shield terminals (11) individually attached to terminal parts of the plurality of shielded electric wires (25); and a ground bar (30) elongated in the parallel direction of the shielded electric wires (25). The plurality of shielded electric wires (25) each have a core wire (26) and a shield member (28) surrounding the core wire (26). The shield terminals (11) each have an inner conductor (12) connected to the core wire (26), and an outer conductor (14) that surrounds the inner conductor (12). The outer conductor (14) has a connection part (18) in which an opposed surface (20) facing the shield member (28) is formed. The connection part (18) has a form in which a portion of the shield member (28) facing the ground bar (30) is exposed as an exposed surface (29). The ground bar (30) includes a conduction part (32) that is conductively fixed to the opposed surface (20) and the exposed surface (29).

Description

Wire harness

[0001] The present disclosure relates to a wire harness.

[0002] Patent Document 1 discloses a coaxial cable assembly having a plurality of coaxial cables arranged in parallel and a ground bar. The ground bar is attached to an outer conductor of the coaxial cable with a part of the outer jacket removed and exposed so as to sandwich it from above and below. The plurality of outer conductors are held at the same potential via the ground bar.

[0003] Japanese Patent Application Laid-Open No. 2010-092732

[0004] A shield terminal having a shielding function is connected to the terminal portion of the coaxial cable. When connecting the outer conductor of the shield terminal and the shield member in a conductive manner, a structure is adopted in which an open barrel-shaped crimping portion formed on the outer conductor is crimped to the shield member. However, when an open barrel-shaped crimping portion is formed on the outer conductor, there is a problem that the shape of the outer conductor becomes complicated.

[0005] The shield cable of the present disclosure has been completed based on the above circumstances, and aims to simplify the shape of the shield terminal.

[0006] The wire harness of the present disclosure includes: a plurality of shielded wires arranged in parallel; a plurality of shield terminals individually attached to the terminal portions of the plurality of shielded wires; and a ground bar extending longitudinally in the parallel direction of the plurality of shielded wires. The shielded wire has a core wire and a shield member surrounding the core wire. The shield terminal has an inner conductor connected to the core wire and an outer conductor surrounding the inner conductor. The outer conductor has a connection portion formed with a facing surface facing the shield member. The connection portion is in a form that exposes a portion of the shield member facing the ground bar as an exposed surface. The ground bar includes a conduction portion that is conductively fixed to the facing surface and the exposed surface.

[0007] According to the present disclosure, the shape of the shield terminal can be simplified.

[0008] Figure 1 is a perspective view of the connector of Embodiment 1. Figure 2 is a perspective view showing the wire harness and housing separated. Figure 3 is a perspective view showing the wire harness with the bar member removed. Figure 4 is a front cross-sectional view of the wire harness. Figure 5 is a side cross-sectional view of the wire harness.

[0009] [Description of Embodiments of the Disclosure] First, embodiments of the disclosure will be listed and described. Any combination of the following embodiments, insofar as they do not contradict each other, is also included as a form for carrying out the invention.

[0010] The wire harness of this disclosure comprises: (1) a plurality of shielded wires arranged in parallel; a plurality of shield terminals individually attached to the ends of the plurality of shielded wires; and a ground bar extending elongated in the parallel direction of the plurality of shielded wires. The shielded wire has a core wire and a shield member surrounding the core wire. The shield terminal has an inner conductor connected to the core wire and an outer conductor surrounding the inner conductor. The outer conductor has a connection portion formed with a facing surface that faces the shield member. The connection portion is configured such that the portion of the shield member facing the ground bar is exposed as an exposed surface. The ground bar includes a conductive portion fixed to the facing surface and the exposed surface so as to be electrically conductive. According to this disclosure, since the connection portion has a facing surface that faces the ground bar and a portion of the shield member is exposed toward the ground bar, the shape can be simplified compared to an open barrel-shaped crimped portion. This allows for simplification of the shape of the outer conductor and the shape of the shield terminal.

[0011] (2) In (1), it is preferable that the ground bar is constructed by assembling a holder having a plurality of grooves for accommodating the shield wire and the connection portion, and a bar member having the conductive portion. With this configuration, a plurality of shield wires and shield terminals can be positioned in parallel.

[0012] (3) In (1) or (2), the connecting portion is cylindrical and arranged to surround the shield member, and it is preferable that the connecting portion has a notch that faces the ground bar, so that the exposed surface faces the ground bar. With this configuration, the shield member can be protected by the cylindrical connecting portion.

[0013] (4) In (3), it is preferable that the ground bar is locked to the notch in the axial direction of the shield wire. With this configuration, multiple shield wires and shield terminals can be arranged in the same position in the axial direction.

[0014] [Details of Embodiments of the Disclosure] [Example 1] A wire harness W of Example 1 embodying the present disclosure will be described with reference to Figures 1 to 5. The present invention is not limited to these examples and is shown by the claims, including all modifications within the meaning and scope of the equivalents of the claims. In Example 1, the front-to-back direction is defined as the direction F in Figures 1 to 3 and 5. The up-and-down direction is defined as the direction H in Figures 1 to 3 and 5. The left-to-right direction is defined as the direction R in Figures 1 to 3.

[0015] The wire harness W in this embodiment 1 is a component that constitutes the connector C by being attached to the connector housing 40. The connector housing 40 is constructed by combining an upper housing 41 and a lower housing 42. As shown in Figure 5, the connector housing 40 has a plurality of terminal housing chambers 43, one bar housing chamber 44, and a plurality of cable housing chambers 45. The plurality of terminal housing chambers 43 are located at the front end of the connector housing 40 and are arranged at a constant pitch in the left-right direction. The bar housing chamber 44 is a long, narrow space extending in the left-right direction and is located behind the terminal housing chambers 43. The plurality of cable housing chambers 45 are located at the rear end of the connector housing 40 and are arranged at a constant pitch in the left-right direction behind the bar housing chamber 44.

[0016] The wire harness W comprises a shielded cable 10 and a ground bar 30. The shielded cable 10 comprises a plurality of shield terminals 11 and a plurality of shielded wires 25.

[0017] The shield terminal 11 has an inner conductor 12 that constitutes a transmission circuit (not shown), a cylindrical dielectric 13 that surrounds the inner conductor 12, and an outer conductor 14. As shown in Figure 5, the outer conductor 14 is constructed by assembling a first cylindrical member 15 and a second cylindrical member 16. The first cylindrical member 15 is a member that constitutes the front end region of the outer conductor 14 and is arranged to surround the dielectric 13. The second cylindrical member 16 has a cylindrical connecting portion 17 and a cylindrical connection portion 18. The connecting portion 17 is fitted into the rear end of the first cylindrical member 15 and is fixed to the first cylindrical member 15 in a electrically conductive manner by crimping, soldering, or the like.

[0018] The connecting portion 18 has a smaller diameter than the connecting portion 17 and extends rearward from the rear end of the connecting portion 17. A notch 19 is formed in the connecting portion 18. The notch 19 is formed by cutting off a portion of the upper end of the connecting portion 18 in the axial direction. The notch 19 has a pair of symmetrical opposing surfaces 20 and a pair of locking surfaces 21. The pair of opposing surfaces 20 are planes that are parallel to the axis of the outer conductor 14 and face upward. An opening 22 is formed between the pair of opposing surfaces 20 in the notch 19, connecting the outside and inside of the connecting portion 18. The opening 22 is a long, narrow slit in the front-rear direction. The pair of locking surfaces 21 are located at the front and rear ends of the notch 19 and are planes perpendicular to the axis of the outer conductor 14.

[0019] The shielded wire 25 comprises a core wire 26, an insulating member 27 surrounding the core wire 26, and a shielding member 28 surrounding the insulating member 27. The insulating member 27 is made of synthetic resin. The outer surface of the insulating member 27 is circular. The shielding member 28 is made of metal foil. The shielding member 28 does not have a sheath surrounding it. That is, the outermost layer of the shielded wire 25 is composed solely of the shielding member 28.

[0020] The front end of the shielded wire 25 is coaxially inserted into the outer conductor 14 of the shield terminal 11. As shown in Figure 5, the front end of the core wire 26 is fixed to the rear end of the inner conductor 12 so as to be electrically conductive. The front end of the insulating member 27 is housed within the connection portion 18. The front end of the shielding member 28 is also housed within the connection portion 18. Most of the front end of the shielding member 28 is surrounded by the cylindrical connection portion 18, but the area of ​​the outer surface of the shielding member 28 corresponding to the opening 22 of the connection portion 18 is exposed to the outside of the connection portion 18 as an exposed surface 29.

[0021] The ground bar 30 has a long, slender shape that extends in the parallel direction (left-right direction) of the shield wires 25. The ground bar 30 is constructed by assembling a bar member 31 and a holder 33. The bar member 31 has a constant thickness and is a flat plate-shaped member that extends in the parallel direction of the shield wires 25. The bar member 31 is made of a conductive material such as metal. The lower surface of the bar member 31 functions as a conductive portion 32.

[0022] The holder 33 is made of metal. A fitting groove 34 is formed on the upper surface of the holder 33, extending in an elongated shape along the parallel direction (left-right direction) of the shield wire 25. The bar member 31 is fitted into the fitting groove 34. The holder 33 has a plurality of groove portions 35 formed by recessing the bottom surface of the fitting groove 34. In a front view of the ground bar 30, each groove portion 35 is U-shaped. The bottom surface of the groove portion 35 is a semi-circular arc. The radius of curvature of the semi-circular arc of the bottom surface is slightly larger than the radius of the outer surface of the shield member 28. The left and right inner surfaces of the groove portion 35 are planes that extend in the vertical direction and are parallel to each other. The depth dimension of the groove portion 35 from the bottom surface of the fitting groove 34 is greater than the outer diameter of the shield member 28 and smaller than the outer diameter of the connection portion 18. The area of ​​the bottom surface of the fitting groove 34 in which the groove portion 35 is not formed is defined as the support surface 36.

[0023] The assembly procedure for the wire harness W is described below. First, the core wire 26 of the shield wire 25 and the inner conductor 12 are fixed in a conductive manner by crimping, soldering, etc., and the dielectric 13 is attached to the inner conductor 12. Next, the second cylindrical member 16, which has been fitted onto the shield wire 25 in advance, is slid forward and the connecting portion 17 is fitted onto the rear end of the dielectric 13. In this state, the first cylindrical member 15 is fitted onto the dielectric 13 from the front, and the rear end of the first cylindrical member 15 and the connecting portion 17 are fixed in a conductive manner by crimping, soldering, etc. At the notch 19 of the connection portion 18, the exposed surface 29 of the shield member 28 is exposed upward from the opening 22. Inside the fitting groove 34, the exposed surface 29, the opposing surface 20, and the support surface 36 are aligned in the left-right direction at approximately the same height. With this, the assembly of the shield cable 10 is completed.

[0024] Next, the shield cable 10 and the ground bar 30 are assembled. With the bar member 31 removed from the holder 33, solder paste 46 is applied to the inner circumferential surface of each groove 35, the support surface 36, the opposing surface 20, and the exposed surface 29 (not shown). Alternatively, the solder paste 46 may be applied to the lower surface of the bar member 31 instead of the support surface 36, the opposing surface 20, and the exposed surface 29. Next, the connection portion 18 of the outer conductor 14 is placed in each groove 35. From this state, the bar member 31 is assembled to the holder 33 by fitting it into the fitting groove 34. As a result, the bar member 31 and the groove 35 form a connection hole 37 that penetrates the ground bar 30 in the front-rear direction. The connection portion 18 and the shield wire 25 are then passed through each connection hole 37. Within the notch 19, the front and rear edges of the bar member 31 are locked to a pair of front and rear locking surfaces 21, thereby restricting the relative displacement of the connection portion 18 (outer conductor 14) to the ground bar 30 in the front-rear direction.

[0025] In this state, the solder paste 46 is heated. The heated solder paste 46 becomes molten and fills the gap between the inner circumferential surface of the connection hole 37 (groove 35) and the outer circumferential surface of the connection part 18, the gap between the bar member 31 and the support surface 36, the gap between the bar member 31 and the opposing surface 20, and the gap between the bar member 31 and the exposed surface 29. When the solder paste 46 solidifies, the holder 33 and the connection part 18 are electrically fixed together within the connection hole 37. Within the fitting groove 34, the bar member 31 and the holder 33 (support surface 36) are fixed together. The opposing surface 20 and the exposed surface 29 are electrically fixed together with respect to the bar member 31 (conductive part 32) via the solder paste 46. The opposing surface 20 of the outer conductor 14 and the exposed surface 29 of the shield member 28 are electrically fixed together via the conductive part 32. With the above steps, the assembly of wire harness W is complete.

[0026] The connector C is formed by attaching the wire harness W to the connector housing 40. Multiple shield terminals 11 are individually housed in multiple terminal housing chambers 43, the ground bar 30 is housed in a bar housing chamber 44, and the portion of the front end of the shield wire 25 that is led out from the ground bar 30 to the rear is individually housed in multiple cable housing chambers 45.

[0027] The wire harness W of this embodiment 1 comprises a plurality of shielded wires 25 arranged in parallel, a plurality of shield terminals 11, and a ground bar 30. The plurality of shield terminals 11 are individually attached to the terminal portions (front ends) of the plurality of shielded wires 25. The ground bar 30 is a member that extends in a long, slender shape in the parallel direction of the plurality of shielded wires 25. The shielded wire 25 has a core wire 26 and a shield member 28 that surrounds the core wire 26. The shield terminal 11 has an inner conductor 12 connected to the core wire 26 and an outer conductor 14 that surrounds the inner conductor 12.

[0028] The outer conductor 14 has a connection portion 18 on which a facing surface 20 is formed that faces the shield member 28 (bar member 31). The connection portion 18 is configured such that the portion of the shield member 28 facing the ground bar 30 (bar member 31) is exposed as an exposed surface 29. The ground bar 30 includes a conductive portion 32 that is fixed to the facing surface 20 and the exposed surface 29 so as to be electrically conductive. With this configuration, the connection portion 18 has a facing surface 20 that faces the ground bar 30, and a part of the shield member 28 is exposed toward the ground bar 30, so the shape can be simplified compared to an open barrel-shaped crimped portion. This simplifies the shape of the outer conductor 14 and the shape of the shield terminal 11.

[0029] The ground bar 30 is constructed by assembling a holder 33 and a bar member 31 having a conductive portion 32. The holder 33 has a plurality of grooves 35 formed therein for accommodating the shield wire 25 and the connection portion 18. With this configuration, multiple shield wires 25 and shield terminals 11 can be positioned in parallel. The ground bar 30 is locked in the axial direction of the shield wire 25 to a pair of locking surfaces 21 formed in the notch portion 19. With this configuration, multiple shield wires 25 and shield terminals 11 can be arranged in the same position in the axial direction.

[0030] The connecting portion 18 is cylindrical and is positioned to surround the shield member 28. The connecting portion 18 has a notch 19 formed in the part that faces the ground bar 30 (upper end). The notch 19 is the part that brings the exposed surface 29 of the shield member 28 into contact with the ground bar 30. With this configuration, the shield member 28 can be protected by the cylindrical connecting portion 18.

[0031] [Other Embodiments] The present invention is not limited to the embodiments described above and in the drawings, but is shown in the claims. The present invention includes the meaning of equivalences to the claims and all modifications within the claims, and also includes the following embodiments. The area of ​​the shielded wire exposed to the rear from the connection of the outer conductor may be surrounded by a sheath. The shield member may be in the form of a metal foil surrounded by braided wire, or it may be composed of braided wire alone. The connection is not limited to a cylindrical shape, but may be in the form of an arc-shaped plate along the outer surface of the shield member. In this case, the connection may be in the form of having no notches. The ground bar may be in the form of having no grooves. The ground bar may be in the form of having no holder and consisting only of a bar member. The ground bar may be in the form of having no function of positioning a plurality of shielded wires and a plurality of shield terminals in the axial direction. The holder may be made of a non-conductive material.

[0032] C...Connector W...Wire harness 10...Shielded cable 11...Shield terminal 12...Inner conductor 13...Dielectric 14...Outer conductor 15...First cylindrical member 16...Second cylindrical member 17...Connecting part 18...Connection part 19...Notch 20...Opposite surface 21...Locking surface 22...Opening 25...Shielded wire 26...Core wire 27...Insulating member 28...Shielding member 29...Exposed surface 30...Ground bar 31...Bar member 32...Conductive part 33...Holder 34...Matching groove 35...Groove part 36...Support surface 37...Connection hole 40...Connector housing 41...Upper housing 42...Lower housing 43...Terminal housing chamber 44...Bar housing chamber 45...Cable housing chamber 46...Solder paste

Claims

1. A wire harness comprising: a plurality of shielded wires arranged in parallel; a plurality of shield terminals individually attached to the ends of the plurality of shielded wires; and a ground bar extending elongated in the parallel direction of the plurality of shielded wires, wherein the shielded wires have a core wire and a shield member surrounding the core wire; the shield terminals have an inner conductor connected to the core wire and an outer conductor surrounding the inner conductor; the outer conductor has a connection portion formed with a facing surface that faces the shield member; the connection portion is configured to expose the portion of the shield member facing the ground bar as an exposed surface; and the ground bar includes a conductive portion fixed to the facing surface and the exposed surface so as to be electrically conductive.

2. The wire harness according to claim 1, wherein the ground bar is constructed by assembling a holder having a plurality of grooves for accommodating the shielded wire and the connection portion, and a bar member having the conductive portion.

3. The wire harness according to claim 1 or 2, wherein the connecting portion is cylindrical and arranged to surround the shield member, and the connecting portion has a notch formed in such a form that the portion facing the ground bar is notched, and the exposed surface faces the ground bar.

4. The wire harness according to claim 3, wherein the ground bar is locked to the notch in the axial direction of the shield wire.

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