JP2003234156A - Shielded electric wire connector - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To improve a shield performance by stabilizing connection state of a shield layer 16 and shield connection parts 48 while simplifying attachment of the shield coupling parts to the shield layer of a shielded electric wire with respect to a shielded electric wire connector equipped with the shield connection parts 48 which connects electrically the shield layer 16 and the shield pipe 44 of the shielded electric wire. <P>SOLUTION: The shield connection parts 48 is constituted of two half-cut parts 55 formed so that the two half-cut parts may bind tight the shield layer 16, which is exposed on an insulation layer 14 of the shielded electric wire, by combining each other. The two half-cut parts 55 consist of integrally molded parts of metal parts 56 and resin parts 58, respectively. The metal parts 56 connect electrically the shield layer 16 and the shield pipe 44 of the shielded electric wire. The resin parts 58 has a binding part for combining the two half-cut parts 55. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a shielded wire connector used for connecting shielded wires.

[0002]

2. Description of the Related Art When connecting a shielded wire, the end portion of the shielded wire is stripped off to expose the center conductor and the shield layer, and the center conductor is electrically connected to the center conductor of the other party (shielded wire or device). At the same time as connecting, it is necessary to electrically connect the shield layer to the other shield layer while maintaining the shield function. For this reason, the shielded wire connector is equipped with a shield pipe for shielding the connection part of the shielded wire, and this shielded pipe is electrically connected to the shield layer of the shielded wire through the shield connecting component. There is.

FIG. 7 shows a shield connecting component used in a conventional shielded wire connector. In the figure, 10
Is a shielded electric wire, 12 is a central conductor of the shielded electric wire 10, 14 is an insulating layer, 16 is a shield layer (braided conductor, etc.) folded from the insulating layer 14 onto the sheath (outer sheath), and 20 is a shield connecting component. . This shield connecting part 20 has a compression sleeve part.
22 and the cylindrical contact portion 24 are integrally formed via a connecting wall portion 26. The compression sleeve portion 22 is a portion that is compressed and fixed to the shield layer 16 that is folded back on the sheath of the shielded electric wire 10, and the cylindrical contact portion 24 is a portion that contacts the inner peripheral surface of the shield pipe. Such shield connecting parts 20
Is manufactured by drawing a metal plate. Therefore, the compression sleeve portion 22 and the cylindrical contact portion 24 are provided with discontinuous portions 29 and 30 at a part in the circumferential direction.

A metal tape (usually a copper tape) 28 is wound around the shield layer 16 folded back on the sheath, and the compression sleeve portion 22 is compressed and fixed onto the metal tape 28. Further, in order to impart radial elasticity to the cylindrical contact portion 24, a gap is provided in the discontinuous portion 30,
Moreover, an opening 32 larger than a half circumference is formed in the step portion between the compression sleeve portion 22 and the cylindrical contact portion 24 (the connecting wall portion 26).
Is formed in an area smaller than half the circumference).

[0005]

The conventional shielded wire connector has the following problems because it uses the above-described shield connecting component. (1) The shield layer is folded back on the sheath, the metal tape is wrapped around it, and the compression sleeve part of the shield connecting part is compressed and fixed on it, so the installation of the shield connecting part is troublesome and the mechanization of installation is also difficult. Have difficulty. (2) Since the shield layer is compressed from above the sheath, when the sheath deteriorates and shrinks due to the influence of heat, the tightening force of the compression sleeve part is lost and the connection state becomes unstable, and the shield performance deteriorates. (3) There is a large opening in the step between the compression sleeve and the cylindrical contact,
This opening affects the outflow of noise to the outside and reduces the shield performance.

An object of the present invention is to provide a shielded wire connector that solves the above problems.

[0007]

In order to achieve this object, the present invention provides a shield pipe that shields a connection portion of a shielded electric wire, and a shield connection that electrically connects a shield layer of the shielded electric wire and the shield pipe. In the shielded wire connector including a component, the shielded connection component is composed of two half-divided components formed so as to fasten a shield layer that is coupled to each other and exposed on the insulating layer of the shielded wire. It is a thing.

The two halves of the shielded electric wire connector of the present invention respectively include the shield on the inner peripheral portion of the semi-annular wall portion that closes the annular gap between the shield layer of the shielded electric wire and the shield pipe by about half the circumference. An inner peripheral side contact piece that is pressed against a layer or a metal tape wound around the outer periphery thereof is integrally formed, and an outer peripheral side contact piece that contacts the inner peripheral surface of the shield pipe is integrally formed on the outer peripheral portion of the semi-annular wall portion. It is preferable to provide the metal part formed in the above.

Further, each of the two half-divided parts in the shielded wire connector of the present invention integrally includes a resin part formed with a joining portion for joining the two half-divided parts, and a metal part configured as described above. It is preferably composed of

The resin component in the shielded wire connector of the present invention is preferably formed integrally with the metal component by insert molding using the metal component as the insert component.

Further, the resin component in the shielded wire connector of the present invention includes a portion for tightening the shield layer of the shielded wire via the inner peripheral side contact piece of the metal component and a portion for directly tightening the sheath of the shielded wire by biting into the sheath. It is preferable to have one.

[0012]

Embodiments of the present invention will be described below.
A detailed description will be given with reference to the drawings.

FIG. 1 shows an embodiment of a shielded wire connector according to the present invention. In the figure, 10 is a shielded electric wire, 12 is a central conductor of the shielded electric wire 10, 14 is an insulating layer, 16 is a shield layer exposed on the insulating layer 14, 18 is a sheath, 40 is a shielded wire connector, and 42 is a central conductor 12. A female terminal crimped, 44 is a shield pipe for shielding the connection part of the shielded electric wire, 46 is a housing integrated with the shield pipe 44, 48 is a shield layer 16 on the insulating layer 14 and a shield pipe 44
Is a shield connecting component for electrically connecting and, 50 is a metal tape wound on the shield layer 16, 52 is a waterproof packing, and 54 is a retainer. The female terminal 42 is connected to the male terminal crimped to the center conductor of the counterpart shielded electric wire. The shield pipe 44 has its tip end fitted to the shield pipe of the other shielded electric wire connector to shield the connection portion of the shielded electric wire.

The shield connecting component 48 used in the shielded wire connector 40 is composed of two half-divided components 55 which are joined to each other and are formed so as to tighten the shield layer 16 from above the metal tape 50. Two halves 55
Is composed of a metal part 56 and a resin part 58,
It has the same structure.

As shown in FIGS. 2 (A) and 2 (B), the metal component 56 includes an inner peripheral side contact piece 62 on the inner peripheral portion of a semi-annular wall portion 60 in which an annular plate is substantially halved, and an outer peripheral portion. The outer peripheral side contact piece 64 is integrally formed in the portion. The semi-annular wall portion 60 is the shield layer 16
The size is such that the annular space between the shield pipe 44 and the shield pipe 44 is closed by about half a circumference. The inner peripheral side contact piece 62 is bent at a substantially right angle from the inner peripheral edge of the semi-annular wall portion 60 to the back side so as to contact the metal tape 50 on the shield layer 16. The inner contact piece 62 increases the contact pressure with the metal tape 50.
As shown in (B), it is formed in a corrugated shape, and the tip edge portion is bent inward. On the other hand, the outer peripheral contact piece 64
Is bent obliquely outward from the outer peripheral edge of the semi-annular wall portion 60 to the rear surface side so as to contact the inner peripheral surface of the shield pipe 44 with spring elasticity. Further, as shown in FIG. 2 (C), a bulge portion 66 protruding outward is provided at the tip of the outer peripheral side contact piece 64.
Are formed. The outer peripheral side contact piece 64 slidably contacts the inner peripheral surface of the shield pipe 44 at the bulge portion 66.

Two holes 68A and 68B for assembling the resin component 58 are formed in the semi-annular wall portion 60, and a retaining piece 70 is formed in one hole 68A. Figure 2
(D) is a development view of the metal component 56 shown in FIGS. (A) and (B), that is, a state before the inner peripheral side contact piece 62 and the outer peripheral side contact piece 64 are bent. .

On the other hand, in the resin component 58, as shown in FIGS. 3 and 4, joint portions with opposite resin components (having the same structure except that the left and right sides are opposite) are formed on both sides of the arc-shaped peripheral wall portion 72. It is a thing. That is, the male side projection piece 74 is formed on one side edge of the arcuate peripheral wall portion 72, and two female side projection pieces of one set are formed on the other side edge.
76A and 76B are formed, a locking projection 78 is formed on the outer surface of the male side protruding piece 74, and a locking window portion 80 is formed on the outer female side protruding piece 76A. As shown in FIG. 4, the two resin parts 58 are opposed to each other so that the left and right sides are opposite to each other, and the male side protruding piece 74 is inserted between the mating female side protruding pieces 76A and 76B. After the side projection 76A is elastically deformed slightly outward by pushing the locking projection 78, the locking projection 78 is restored to its original position when it comes to the position of the locking window 80, and the locking projection 78 is locked. Enter Part 80. As a result, the two resin parts 58 are connected to each other.

Further, on the front end surface of the arcuate peripheral wall portion 72, two convex portions 82A and 82B to be inserted into the two holes 68A and 68B of the metal component 56 are formed. Also, this resin part 58
Is the portion P where the shield layer 16 of the shielded wire is fastened.
And a portion Q for tightening the sheath 18 of the shielded wire are continuously formed in the axial direction (FIGS. 3B and 3D).
reference). Further, as shown in FIG. 1, a projecting edge 84 that bites into the sheath 18 is formed at the rear end edge of the portion Q where the sheath 18 is tightened.

In order to integrate the metal component 56 and the resin component 58 configured as described above, the projections 82 A, 82 of the resin component 58 are integrated.
B may be inserted into the holes 68A and 68B of the metal part 56. By fitting the two protrusions 82A and 82B and the two holes 68A and 68B, the metal component 56 and the resin component 58 are accurately positioned. Further, when the one convex portion 82A is pushed into the one hole 68A, the V-shaped edge of the retaining piece 70 bites into the convex portion 82A, and the convex portion 82A cannot be pulled out. As a result, the metal part 56 and the resin part 58 are integrated.

The metal component 56 and the resin component 58 are integrated into a half component 55. FIG. 5 shows a state in which two halves 55 are joined together. The thick line is the metal part 56, and the thin line is the resin part 58. The two halves 55 are joined by the engagement of the engagement protrusion 78 of the resin component 58 and the engagement window 80.
When the two half-split parts 55 are combined so as to sandwich the shield layer 16 and the sheath 18 as shown in FIG. 1, the inner peripheral side contact piece 62 of the metal part 56 is strongly pressed against the metal tape 50 on the shield layer 16. . Further, the projecting edge 84 at the rear end of the resin component 58 bites into the sheath 18, and the shield connecting component 48 and the shielded electric wire 10
The unity with is secured. Further, when the shield pipe 44 is arranged at a predetermined position, the outer peripheral side contact piece 64 of the metal component 56 elastically deforms in the diameter reducing direction, and the elastic repulsive force makes contact with the inner peripheral surface of the shield pipe 44. This brings the shield layer 16 and the shield pipe 44 into an electrically connected state. In this state, the semi-annular wall portions 60 of the two metal components 56 close the annular gap between the shield layer 16 and the shield pipe 44 by approximately half a circumference, so that the opening area is sufficiently small and good shielding performance is obtained. be able to.

In the above embodiment, the metal part 56 and the resin part 58 are manufactured as separate parts, and these are combined to form the half-split part 55. However, the resin part is an insert molding in which the metal part is an insert part. Thus, it can be formed integrally with the metal component. This is preferable because it saves the labor of connecting the metal component and the resin component and reduces the number of components.

In the above embodiment, the resin component 58 has a structure having the portion P for fastening the shield layer 16 and the portion Q for fastening the sheath 18, but the resin component may have a structure for fastening only the shield layer. .

Further, in the above embodiment, the half-split part 55
Although the shield layer 16 is tightened via the metal tape 50, the metal tape may be omitted and the shield layer on the insulating layer may be directly tightened by two half-divided parts.

FIG. 6 shows another embodiment of the half-split part 55 used in the shielded wire connector of the present invention. The half-divided component 55 is composed of only metal components without using resin components. That is, the semi-annular wall portion 60 of the metal component
One end side is extended to form an extension portion 86, and a cut-and-raised piece 88 is formed on the extension portion 86, and at the other end side of the semi-annular wall portion 60, a cut-and-raised portion of a mating half-part having the same structure The holes 90 are formed so that the strips engage with each other. By providing the mating parts 88, 90 of the counterpart half-divided parts on the metal parts in this way, it is possible to omit the resin parts.

[0025]

As described above, the present invention has the following effects. (1) The shield connecting part is made up of two half parts, and the two half parts are joined together to tighten the shield layer on the insulating layer. Is also easy to mechanize. (2) Since the shield layer on the insulating layer is tightened, there is little risk that the tightening force will decrease due to the effect of heat, and stable shield performance can be obtained. (3) Since the annular gap between the shield layer and the shield pipe is almost closed by the semi-annular wall portions of the two metal parts, the shield performance is improved.

[Brief description of drawings]

FIG. 1 is a sectional view showing an embodiment of a shielded wire connector according to the present invention.

FIG. 2 shows a metal part used in the connector of FIG.
(A) is a front view, (B) is a sectional view taken along line BB of (A),
(C) is an enlarged side view of the outer peripheral side contact piece, and (D) is a developed view.

FIG. 3 is a view of the resin part used in the connector of FIG.
(A) is a front view, (B) is a right side view, (C) is a left side view, and (D) is a bottom view.

4 is a schematic perspective view of the resin component of FIG.

5 (A) is a front view and FIG. 5 (B) is a cross-sectional view showing a shield connecting component used in the connector of FIG.

FIG. 6 is a front view showing another embodiment of a half-divided component used in the shielded wire connector of the present invention.

FIG. 7 is a front view and (B) is a perspective view showing a shield connecting component used in a conventional shielded wire connector.

[Explanation of symbols]

10: Shielded wire 12: Center conductor 14: Insulation layer 16: Shield layer 18: Sheath 40: Shielded wire connector 42: Female terminal 44: Shield pipe 46: Housing 48: Shield connection component 50: Metal tape 52: Waterproof packing 55: Half-split parts 56: Metal parts 58: Resin parts 60: Semi-annular wall 62: Inner peripheral side contact piece 64: Outer contact piece 68A, 68B: Hole 70: retaining piece 72: Arc-shaped peripheral wall 74: Male side protrusion 76A, 76B: Female protrusion 78: Locking protrusion 80: Locking window 82A, 82B: convex part 84: Edge

Claims (5)

[Claims] 1. A shield pipe (44) for shielding a connection part of a shielded electric wire (10), and a shield connecting component (48) for electrically connecting a shield layer (16) of the shielded electric wire and the shield pipe (44). ), The shield connecting component (48) has two halves formed so as to be coupled to each other and tighten the shield layer (16) exposed on the insulating layer (14) of the shield wire. A shielded wire connector characterized by comprising split parts (55). 2. The shielded electric wire connector according to claim 1, wherein each of the two half-divided parts (55) has a semi-annular shape that closes an annular gap between the shield layer of the shielded electric wire and the shield pipe by about half a circumference. A metal tape (5) wound around the shield layer (16) or the outer periphery of the shield layer (16) on the inner periphery of the wall (56)
The inner peripheral side contact piece (62) to be pressed against the inner peripheral surface of the semi-annular wall portion (56) is in contact with the inner peripheral surface of the shield pipe (44). A shielded wire connector comprising a metal component (56) integrally formed with 64). 3. The shielded electric wire connector according to claim 1, wherein each of the two half-divided parts (55) has a connecting portion (78, 80) for joining the two half-divided parts. A connector for a shielded electric wire, characterized in that the connector (58) and the metal component (56) according to claim 2 are integrated. 4. The shielded wire connector according to claim 3, wherein the resin component (58) is integrally formed with the metal component (56) by insert molding. 5. The shielded electric wire connector according to claim 3, wherein the resin component (58) includes a shield layer (16) of the shielded electric wire via an inner peripheral side contact piece (62) of the metal component (56). ) Is tightened (P) and the sheath (18) of the shielded wire is bitten into it and tightened directly (Q)
A shielded wire connector having: