WO2003067718A1

WO2003067718A1 - Shield wire connector

Info

Publication number: WO2003067718A1
Application number: PCT/JP2003/001336
Authority: WO
Inventors: Shuhei Kaneko
Original assignee: The Furukawa Electric Co., Ltd.
Priority date: 2002-02-08
Filing date: 2003-02-07
Publication date: 2003-08-14
Also published as: NO20034482D0; JP3977094B2; NO20034482L; JP2003234156A; NO326897B1

Abstract

A shield wire connector electrically connects a shield wire to a member to be connected. The shield wire includes one end peeled off to be connected to the member, which end has a conductive shield layer exposed from the sheath of the shield wire. The connector includes a conductive shield pipe which surrounds one end of the shield wire and a conductive shield connection member which surrounds the shield layer between the exposed shield layer and the shield pipe to electrically connect the exposed shield layer and the shield pipe. The shield connection member has a pair of half splits which sandwich this exposed shield layer from both radial sides of this exposed shield layer.

Description

Shielded wire connector

Technical field

The present invention relates to a shielded wire connector for connecting a shielded wire to a mating member.

Light

Fine

Background art

In shielded wires, the core wire for power transmission is covered by a shield layer via an insulating layer, and the core wire may be a noise source during power transmission, or external noise may be applied to the core wire of the shielded wire. Overlap is prevented. In other words, the shielded wire secures electromagnetic shielding characteristics by the shield layer.

When such a shielded electric wire is connected to a counterpart member, for example, a shielded electric wire or a device, a shielded electric wire connector is attached to the end of the stripped shielded electric wire in order to maintain the shielding characteristics. For example, Japanese Patent Application Laid-Open Publication No. Hei 6-260246 discloses this type of shielded electric wire connector. This shielded wire connector has a shield pipe that covers the peeled end of the shielded wire and has a tip electrically connected to a shield of a counterpart member. The shielded wire connector has a sleeve, through which a shield layer exposed at the end of the shielded wire is passed, and the exposed shield layer and the base end of the shield pipe are electrically connected via the sleeve. It is connected to the. More specifically, this sleeve has a stepped shape, a large-diameter portion that can contact the shield pipe, a small-diameter portion caulked to the exposed shield layer, and a sheath between the large-diameter portion and the small-diameter portion. And a crimped middle diameter portion.

However, the shielded wire connector of ^ When attaching, it is necessary for the worker to insert the sleeve through the end of the shielded wire and then crimp the sleep, which is a complicated task for each worker. These operations are also unsuitable for machine automation, that is, mass production. Also, in the shielded wire connector disclosed in the above-mentioned publication, the contact state between the exposed shield layer and the small diameter portion of the sleeve varies greatly from connector to connector due to the accuracy of the crimping process itself, and the shield characteristics vary widely. There is a fear. If the sheath deteriorates and contracts under the influence of heat, and the state of contact between the sheath and the middle diameter of the sleeve becomes unstable, the sleeve cannot be securely fixed to the shielded wire. In some cases, the shielding characteristics are degraded. Disclosure of the invention

An object of the present invention is to provide a shielded wire connector which can be easily mounted on a shielded wire, can be automatically mounted by a machine, and has good shielding characteristics.

In order to achieve the above object, a shielded wire connector of the present invention is a shielded wire connector for electrically connecting a shielded wire to a mating member, wherein the shielded wire is peeled to be connected to the mating member. The connector has a conductive shield layer exposed from a sheath of the shielded wire, the connector includes a conductive shield pipe surrounding one end of the shielded wire, and A conductive shield connecting member that surrounds the shield layer between the exposed shield layer and the shield pipe and electrically connects the exposed shield layer and the shield pipe; And a pair of halves sandwiching the exposed shield layer from both radial sides of the exposed shield layer. BRIEF DESCRIPTION OF THE FIGURES

FIG. 1 is a partial cross-sectional view showing a shielded wire connector of an embodiment, FIG. 2 is a cross-sectional view enlarging a region II in FIG. 1,

'' FIG. 3 is a front view of the shield connecting member used in the connector of FIG. 1 and attached to the carrier member.

FIG. 4 is a front view of a carrier member to which the shield connection member of FIG. 3 is attached,

FIG. 5 is an exploded view showing a shield connecting member and a carrier member used in the connector of FIG. 1,

FIG. 6 is a front view of a half body included in another shield connection member used for the connector of FIG. 1,

FIG. 7 is a sectional view showing another shield connecting member and a carrier member used in the connector of FIG. BEST MODE FOR CARRYING OUT THE INVENTION

FIG. 1 shows a shielded electric wire connector of an embodiment. This connector is attached to the peeled end of the shielded electric wire 2 and is used to connect the shielded electric wire 2 to a partner member, for example, a shielded electric wire or a device.

This connector includes a cylindrical connector housing 4, which has a large-diameter tip 6. The distal end portion 6 can be fitted with a housing (not shown) of the connector attached to the shielded electric wire of the mating member. Further, the housing 4 has a support portion 8 integrally formed inside the distal end portion 6 side, and the sabot portion 8 has a cylindrical shape, and its outer periphery is fixed to the housing 4 via an arm 10. Have been.

A female terminal (hereinafter simply referred to as a metal fitting and denoted by reference numeral 12) is provided in the support portion 8, and a distal end of the metal fitting 12 can be fitted to a male terminal of a mating member. Money The tool 12 is restricted from moving along the axial direction and the radial direction of the support portion 8 by a step portion 14 and a hook (not shown) formed in the support portion 8. At the base end side of the metal fitting 12, the core wire 16 and the insulating layer 18 of the shielded wire 2 exposed by peeling are crimped. At the end of the electric wire 2, the shield layer 20 is exposed adjacent to the exposed insulating layer 18. The shield layer 20 is made of a metal wire woven in a mesh shape, surrounds the core wire 16 and the insulating layer 18 in a circumferential direction, and a copper metal tape 22 is wound around the exposed shield layer 20 along the circumferential direction. It is attached.

The metal tape 22 is surrounded by a metal shield connection member 24 and a resin carrier member 26 holding the shield connection member 24, which will be described later, and the outer periphery of the shield connection member 24 is connected to a metal shield pipe 28. Inscribed.

The shield pipe 28 is disposed concentrically within the housing 4 and surrounds the peeled end of the electric wire 2 along the axial direction of the electric wire 2. An end of the shield pipe 28 opposite to the shield connection member 24 can be fitted with a shield pipe of a mating member. A slit 30 and a protrusion (not shown) are formed at the end of the shield pipe 28 on the mating member side. The slit 30 extends in the axial direction of the shield pipe 28, and the protrusion is formed on the outer peripheral surface of the shield pipe 28. From the housing 4 toward the housing 4. The arm 30 is sandwiched between the slits 30 by the force 10 and the projections engage with recesses (not shown) formed in the housing 4, thereby forming the shield pipe 28 along the circumferential direction and the axial direction of the housing 4. Movement is regulated.

The carrier member 26 extends in the axial direction of the electric wire 2 and also surrounds the sheath 32 of the electric wire 2 adjacent to the exposed shield layer 20. A rubber waterproof ring 34 and a resin lid 36 are fitted in a sheath 32 extending from the end face of the carrier member 26 opposite to the metal fitting 12.

FIG. 2 is an enlarged partial sectional view of region II in FIG. 2 shows a cross section of a member 24 and a carrier member 26 holding the shield connection member 24. FIG. 3 shows a front view of the shield connecting member 24 held by the carrier member 26. FIG.

The shield connecting member 24 includes a pair of halves 38, 38, which are positioned symmetrically with the axis of the shield connecting member 24 as the rotation axis twice. Each half body 38 has a substantially semicircular shield wall portion 40, and the shield wall portion 40 is included in a plane orthogonal to the axial direction of the electric wire 2. In a state where the half bodies 38, 38 are held by the carrier member 26, the pair of shield wall portions 40, 40 have a substantially circular shape as a whole while being slightly separated from each other.

Each shield wall portion 40 has a substantially arc-shaped inner periphery 42 and outer periphery 44, and the inner periphery 42 surrounds the metal tape 22. A corrugated plate-shaped connecting portion 46 is formed on the inner periphery 42 of the body, and the corrugated connecting portion 46 extends along the axial direction of the metal tape 22 and is in close contact with the metal tape 22.

The outer periphery 44 of each shield wall portion 40 extends along the circumferential direction of the shield pipe 28 and is separated from the inner peripheral surface of the shield pipe 28 with a slight gap. A trapezoidal connection 48 is formed in the body. These trapezoidal connection portions 48 are arranged along the outer periphery 44, and each extend obliquely toward the shield pipe 28 on the carrier member 26 side. On the outer surface of the trapezoidal connection portion 48, a circular bulge 50 protruding toward the shield pipe 28 is formed, and the bulge 50 is in contact with the inner periphery of the shield pipe 28. More specifically, the trapezoidal connecting portion 48 is reduced in diameter to the shield pipe 28 via the bulging portion 50, and the bulging portion 50 comes into close contact with the shield pipe 28 by the elastic repulsive force of the trapezoidal connecting portion 48. ing.

On the other hand, two through holes 52, 54 are formed in each shield wall 40, and the opening of the through hole 52 is circular. At the opening of the through hole 54, one side is arc-shaped. The remaining three sides are straight, and on one side of the straight line opposite the arc-shaped side, a claw 56 that extends toward the arc-shaped side while being inclined toward the bracket 12 is formed in a body. The tip 56 of the nail is cut out in a V-shape.

In the shield connecting member 24, the above-described corrugated connecting portions 46, 46 and the through holes 54, 54 are positioned on a straight line 57 extending radially through the axis of the shield connecting member 24. The pair of halves 38, 38 are separated from each other in the direction along.

FIG. 4 shows a carrier member 26, which has a cylindrical shape extending in the axial direction of the electric wire 2. The carrier member 26 includes a pair of trees 58, 58 connected to each other, and the lunar bodies 58, 58 are connected with symmetry about the axis of the carrier 26 as two rotation axes. Have been allowed.

Referring again to FIGS. 2 and 3, each resin body 58 has a pair of end faces 60 and 61, and a cylindrical shape is formed from the end face 60 in contact with the shield wall portion 40 along the axial direction of the carrier member 26. The two projections 62 and 64 protrude. The projections 62, 64 are formed so as to correspond to the through holes 52, 54 of the half body 38, respectively, and the projections 62, 64 of one resin body 58 are formed with the through holes 52, 54 of one half body 38. Are communicated to each other. Therefore, the half body 38 is accurately positioned on the end face 60 of the resin body 58 by the projections 62 and 64 and the through holes 52 and 54. Then, the V-shaped tip of the claw 56 engages with the outer periphery of the projection 64 passed through the through hole 54 to prevent the projection 64 from coming off, and the half body 38 and the resin body 58 are fixed to each other. I have.

Each resin body 58 has an arc-shaped inner peripheral wall 66 and an outer peripheral wall 68 extending between the end face 60 and the other end face 61, and the inner peripheral wall 66 and the outer peripheral wall 68 are formed concentrically. The inner peripheral wall 66 is stepped and has a small arc portion 70 on the end surface 60 side and a large arc portion 72 on the other end surface 61 side. The small arcuate portion 70 surrounds the exposed shield layer 20 and the metal tape 22 wound therearound, and By pressing against the metal tape 22, the contact between the corrugated connection 46 and the metal tape 22 is further strengthened.

The large arc 72 surrounds the sheath 32 adjacent to the exposed shield layer 20. A ridge portion 74 extending along the inner circumference of the large arc portion 72 is integrally formed with an end edge of the large arc portion 72 on the other end surface 6 1 side, and the ridge portion 74 is formed inward along the radial direction of the carrier member 26. That is, it protrudes toward the sheath 32 side. Therefore, the ridge portion 74 cuts into the outer periphery of the case 32, and the movement of the carrier member 26 along the axial direction of the electric wire 2 is restricted by the ridge portion 74. Further, according to the ridge portion 74, even when the sheath 32 is deteriorated and contracted, the movement of the carrier member 26 is surely restricted.

Referring again to FIG. 4, on one side of the outer peripheral wall 68, a plate-like male connection portion 76 is formed in a body, and the male connection portion 76 is provided with the waveform connection portions 46, 46 and through holes. The holes 54, 54 extend parallel to the positioned straight line 57. A female joint 78 is formed on the other side of the outer peripheral wall 68 so that the male joint 76 of the resin body 58 forming a pair can be inserted into the female joint 78. More specifically, the female connecting portion 78 includes a pair of parallel walls 80 and 82, and the parallel walls 80 and 82 are separated from each other by a groove into which the male connecting portion 76 is inserted. Extending. A protrusion 84 is formed on the side surface of the male connecting portion 76, and a hole 86 that matches the protrusion 84 is formed on the side surface of the parallel wall 82 in the female connecting portion 78. Therefore, the pair of resin members 58 and 58 are fixed to each other by the projection 84 engaging with the hole 86 of the parallel wall 82.

Here, the male connecting portion 76 is inserted into the female connecting portion 78 along the straight line 57, and the small arc portion 70 of the inner peripheral wall 66 effectively presses the corrugated connecting portion 46 against the metal tape 22. On the other hand, the ridge portion 74 of the large circular arc portion 72 effectively cuts into the sheath 32.

The shielded wire connector of the above-described embodiment is manufactured and assembled as follows. Can stand.

First, after the metal plate is formed by press working, the corrugated connecting portion 46 and the trapezoidal connecting portion 48 are bent to produce half bodies 38, 38. On the other hand, the resin bodies 58 are formed by molding the resin. Next, the end of the prepared electric wire 2 is peeled, and a cover material 36 and a waterproof ring 34 are fitted at a predetermined position of the electric wire 2 away from the peeled end. Thereafter, a metal tape 22 is wound around the exposed shield layer 20, and the exposed core 16 and the insulating layer 18 are crimped to the base end of the bracket 12. Then, as shown in FIG. 6, after the half bodies 38, 38 are fixed to the two resin bodies 58, 58, the corrugated connection parts 46, 46 are pressed against the metal tape 22, and The two resin bodies 58, 58 are connected to each other so that the ridge portions 74, 74 bite into the sheath 32. Thereafter, the electric wire 2 to which the shield connection member 24 and the like are attached is inserted into the housing 4 into which the shield pipe 28 is inserted, and a shielded electric wire connector is assembled. At this time, the trapezoidal connection portion 48 of the shield connection member 24 is reduced in diameter by the shield pipe 28 so that the shield pipe 28 and the bulge portion 50 of the trapezoidal connection portion 48 come into close contact with each other.

According to the shielded electric wire connector of the embodiment described above, the metal tape 22 is sandwiched between the pair of half bodies 38, 38 from both sides in the radial direction. Therefore, it is not necessary to perform caulking work when attaching the shield connection member 24 to the electric wire 2.The shield connection member 24 can be quickly and easily attached to the electric wire 2, and this attachment work can be automated by a machine. It is.

Further, in the shielded wire connector of the above-described embodiment, the shield pipe 28 and the exposed shield layer 20 are electrically connected by the pair of half bodies 38, 38. Has shielding properties. This is considered based on the following reasons.

According to the shielded wire connector of the embodiment, the inner circumference of the shield pipe 28 and the exposed The shield connection member 24 is electromagnetically shielded from the shield layer 20 by a shield connection member 24. The shield connection member 24 has a gap between the pair of half bodies 38, 38 and a trapezoidal connection part 48, and , Through holes 52 and 54. However, the through holes 52 and 54 are sufficiently small, and the gaps extending in the radial direction of the shielded wire 2 such as these gaps have a more adverse effect on the shielding characteristics than the gaps extending in the circumferential direction. It is much smaller. Therefore, in the shield connection member of the embodiment, even if it has these gaps and through holes, it has almost the same shield characteristics as the shielded wire connector of the related art.

The present invention is not limited to the above-described embodiment, and various modifications are possible. The metal fitting 12 may be a male terminal instead of a female terminal.

In the embodiment described above, the shield connection member 90 may be replaced with the shield connection member 90 shown in FIG. This shield connection member 90 has a pair of half-damage ij bodies 38, 38, and each half-piece 38 is replaced by a through-hole 52, 54, instead of an overlapping portion 92 extending toward the paired half-body 38. Having. A cut is formed in the overlapping portion 92 in a V-shape, and a triangular protrusion 94 defined by the cut projects from the overlapping portion 92. On the other hand, a hole 96 is formed at the location of the shield wall portion 40 that coincides with the protrusion 94, and the protrusion 94 is engaged with the hole 96 to couple the pair of halves 38, 38 together. Therefore, according to the shield connection member 90, the carrier member 26 is unnecessary.

In the above-mentioned embodiment, the shield connecting member 24 and the carrier member 26 are combined with each other by the force at which the claws 56 are fixed to the projections 64, as shown in FIG. The resin member 58 of the carrier member 26 is preferably integrally molded with the resin member 58 by insert molding. According to this integral molding, the step of connecting the half body 38 and the resin member 58 can be omitted, and the number of parts can be reduced.

In the embodiment described above, the carrier member 26 includes the exposed shield layer 20 and the sheath 3 2, the carrier member 26 may surround only the exposed shield layer 20. .

In the above-described embodiment, the waveform connection portion 46 may be flat instead of a waveform. However, since the contact pressure between the metal tape 22 and the connecting portion 46 can be increased, it is preferable that the surface of the connecting portion 46 in contact with the metal tape 22 has irregularities like the corrugated connecting portion 46. Further, it is more preferable that the front end of the connecting portion 46 opposite to the inner periphery 42 is bent toward the metal tape 22. Further, it is preferable that the metal tape 22 is wound around the exposed shield layer 20, but the shield layer 20 and the waveform connecting portion 46 may be directly contacted without winding the metal tape 22.

Claims

The scope of the claims

1. A shielded electric wire connector for electrically connecting a shielded electric wire to a mating member, wherein the shielded electric wire includes one end peeled to be connected to a mating member, and this end is connected to the shielded electric wire. It has a conductive shield layer exposed from the sheath,

The connector includes a conductive shield pipe surrounding one end of the shielded wire, surrounding the exposed shield layer between the exposed shield layer and the shield pipe, and electrically connecting the exposed shield layer and the shield pipe. A conductive shield connection member for electrically connecting

The shield connecting member has a pair of halves sandwiching the exposed shield layer from both radial sides of the exposed shield layer.

2. In the shielded wire connector of claim 1,

The halves are each formed integrally with a semicircular shield wall having an inner circumference and an outer circumference extending in a circumferential direction of the shield layer, and are formed integrally with an inner circumference of the shield wall, and the exposed shield layer is formed integrally with the shield wall. A plurality of second contact portions integrally formed on the outer periphery of the shield wall portion and arranged along the outer periphery of the shield wall portion. And a plurality of second contact portions that come into contact with each other.

3. In the shielded connector of claim 2,

The second half contact portion is elastically deformed and comes into contact with the shield pipe.

4. The shielded wire connector according to claim 3, wherein the connector further includes a resin carrier member that supports the pair of halves,

The carrier member extends in the axial direction of the shielded electric wire to extend the exposed sheath. An inner peripheral surface surrounding the one layer and an end surface to which the pair of half-shield walls are attached.

5. In the shielded wire connector according to claim 4,

The support member includes a pair of resin bodies, and the pair of resin bodies has a coupling portion for coupling with each other.

6. In the shielded wire connector according to claim 5,

An inner peripheral surface of the carrier member presses the first contact portion of the half against the exposed shield layer.

7. In the shielded wire connector according to claim 6,

The inner peripheral surface of the carrier member further surrounds a sheath adjacent to the exposed shield layer, and is a ridge portion integrally formed on the sheath side and extending along a circumferential direction of the inner peripheral surface, wherein the sheath is It has a ridge that cuts into the hole.

8. In the shielded wire connector according to claim 7,

The surface of the first contact portion in contact with the exposed shield layer in the half-split has an uneven surface.

9. In the shielded wire connector according to claim 8,

The pair of resin bodies of the carrier member are integrally connected to the halves by insert molding, respectively.

10. In the shielded wire connector according to claim 9,

The connector further includes a metal tape interposed between the exposed shield layer and the pair of first connecting portions, and the metal tape is wound around the exposed shield layer.