JPH11354218A - Shielding connector - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a shielding connector capable easily installable. SOLUTION: After inserting an inner ring body 50 inside the exposed part of a shielding layer 13 of a shielded electric wire 10, when an outer ring body 40 is installed on the shielded electric wire 10, the shielding layer 13 is sandwiched and held between both ring bodies 40, 50, so that the shielding layer 13 is reliably contacted with the electrically continuous part 42 arranged in the outer ring body 40 without escaping. When the tail end part of this shielded electric wire 10 is inserted into a housing 21, an elastic contact piece 47 extending from the electrically continuous part 42 elastically contacts with a shielding shell 30 arranged in the housing 21, so that the shielding layer 13 is electrically continued and connected with the shielding shell 30. Thus, according to this invention, a shielding connector can be installed on the tail end of the shielded electric wire without requiring press-fitting work required so far, so that workability can be improved.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] The present invention relates to a shielded connector.

[0002]

2. Description of the Related Art A shield connector has a metal shield shell inside a synthetic resin housing.
The shield shell is attached to a terminal portion of the shielded electric wire, and the shield shell is electrically connected to a shield layer provided on the shielded electric wire. For this purpose, for example, FIG.
As shown in FIG. 1, a terminal fitting 3 is fixed to an end portion of the shielded electric wire 1 at an exposed portion of the conductor 2, and a barrel portion 6 provided in a shield shell 5 is crimped to an exposed portion of the shield layer 4 with a tool. Are accommodated in a connector housing (not shown). In addition, such a thing is disclosed in JP-A-7-245153 and JP-A-8-264.
No. 238 publication.

[0003]

In the above-mentioned conventional shield connector, a crimping operation using a tool is necessary, so that there is a problem that workability is poor.

[0004] The present invention has been made in view of the above circumstances, and has as its object to provide a shielded connector that can be easily assembled.

[0005]

In order to achieve the above-mentioned object, the invention according to claim 1 is provided in a connector housing.
A shield shell is provided to cover the end portion of the shielded wire, and the shield layer of the shielded wire exposed at the end portion is electrically connected to the shield shell. The inner ring to be mounted, the outer ring attached to the outside of the exposed portion of the shield layer and locked with the shield layer sandwiched between the inner ring, and elastic contact with the shield shell, The present invention is characterized in that a conductive portion for connecting the shield shell and the shield layer is provided.

According to a second aspect of the present invention, in the shield connector according to the first aspect, the outer ring is provided with a synthetic resin holder which holds the conductive portion and is locked to the inner ring. It is characterized in that a part of the conductive portion is projected from the outer surface of the holder so that it can elastically contact the shield shell.

According to a third aspect of the present invention, in the shield connector according to the second aspect, the holder has an annular holder base, and is arranged along the circumferential direction of the holder base and extends in the axial direction of the shielded electric wire. A plurality of locking claws are provided, the ends of which are locked to a flange provided at one end of the inner ring. The conductive portion includes an annular conductive base held by the holder base, and a conductive base. The present invention is characterized in that a plurality of elastic contact pieces extending along the gap between the locking claws and projecting toward the shield shell are provided.

According to a fourth aspect of the present invention, there is provided the shield connector according to any one of the first to third aspects, wherein the inner ring body is provided with a non-slip projection which projects to the inner peripheral side and bites into the shielded electric wire. It has features where it is used.

According to a fifth aspect of the present invention, in the shielded connector according to any one of the first to fourth aspects, the shielded electric wire is provided with an outer sheath that covers the outside of the shield layer, so that the shield layer is exposed. The portion is folded back so as to cover the distal end outer surface of the outer sheath, and is characterized in that the inner ring is disposed inside the shield layer.

The invention according to claim 6 is characterized in that in the shield connector according to any one of claims 2 to 5, the holder is formed of a conductive resin.

[0011]

According to the first aspect of the present invention, since the shield layer is held in a state sandwiched between the inner ring and the outer ring, the shield layer is securely connected to the conductive portion without escaping. It can be contacted and made conductively connected to the shield shell via the conductive part. As described above, according to the present invention, the shield connector can be attached to the end of the shielded wire without requiring the crimping work conventionally required, and the workability is improved.

According to the second aspect of the present invention, the holder provided on the outer ring is locked to the inner ring so that the conductive portion provided on the holder is held in a state of being conductively connected to the shield layer. You.

According to the third aspect of the present invention, when the outer ring is inserted into the shielded wire with the inner ring disposed inside the shield layer, a plurality of locking claws provided on the holder of the outer ring. Is locked to a flange provided on the inner ring, the shield layer is sandwiched and held between the outer ring and the inner ring, and the conducting portion provided on the holder is connected to the shield layer. Then, when this shielded electric wire is inserted into the connector housing, the elastic contact piece provided in the conductive portion is brought into elastic contact with the shield shell, and thus the shield layer and the shield shell are electrically connected.

According to the fourth aspect of the present invention, the retaining projection provided on the inner ring body bites into the shielded electric wire, and the inner ring body is securely fixed to the shielded electric wire.

According to the fifth aspect of the present invention, the exposed portion of the shield layer is folded back toward the outer sheath, and the inner ring is disposed inside the outer sheath. In this state, the outer ring is inserted from the distal end of the shield wire. Thus, the shield layer is held between the inner ring and the inner ring.

According to the sixth aspect of the present invention, since the holder is formed of a conductive resin, noise from a gap between the shield shell and the shielded electric wire can be blocked by the holder, and the shielding effect is improved.

[0017]

DESCRIPTION OF THE PREFERRED EMBODIMENTS First Embodiment A first embodiment of the present invention will be described below with reference to FIGS. FIG. 1 shows a shielded electric wire 10 to which the shield connector of the present embodiment is attached. The shielded electric wire 10 is formed by covering the outside of a conductor 11 formed by twisting a plurality of strands with an internal insulating layer 12, covering the outside with a shield layer 13 woven from a thin metal wire, and further covering the outside with an outer sheath 14. Structure.

The terminal portion of the shielded electric wire 10 is hierarchically exposed from the distal end side to the conductor 11, the inner insulating layer 12, and the shield layer 13, and the outer end of the outer sheath 14 is provided with the shield connector of the present embodiment. The inner ring body 50 is fitted.
As shown in FIG. 2, the inner ring body 50 has a structure in which a tapered narrowed end portion 51 is provided at one end of a metal cylindrical body, and a flange 52 projects from the other end. I have. In addition, on the inner peripheral surface of the inner ring body 50, four anti-slip projections 53 are provided at intervals of 90 degrees in the circumferential direction,
These anti-slip projections 53 are in the form of protrusions projecting obliquely inward from the flange 52 side toward the narrowed end portion 51 side.

As shown in FIG. 3, a barrel portion 17 of a female terminal fitting 15 is crimped to the exposed portion of the conductor 11 of the shielded wire 10. Further, a tip end of the terminal fitting 15 has a box-shaped connecting portion 16 to be connected to a counterpart terminal fitting (not shown).
A lance 22 provided on a connector housing 21 (hereinafter, referred to as “housing 21”) described below is locked on one side wall of the terminal housing 15 so that the terminal fitting 15 is prevented from falling into the housing 21.

As shown in FIG. 3, the shield connector of the present embodiment has a shield shell 30 inside a housing 21 made of synthetic resin. The housing 21 includes a cylindrical base 23, and the front side (left side in FIG. 3) of the outer surface of the base 23 is surrounded by a hood 24. The hood portion 24 is open to the front surface of the housing 21, and a mating connector (not shown) is opened from the opening 24 </ b> A to the inside.
Is inserted. The base portion 23 is composed of a small-diameter tube portion 25 located on the front side of the middle portion and a large-diameter tube portion 26 located on the rear side. The structure is such that they are connected by a wall 27 (FIG. 3 shows a cross section of the two connecting walls 27).

The small-diameter cylindrical portion 25 has a terminal fitting 15 inside.
And a lance 22 for retaining the terminal fitting 15 is provided in the cavity 25A.

The internal space of the large-diameter cylindrical portion 26 is
1 is open to the rear end face, and the shield shell 30 is assembled through the opening 26A. Shield shell 30
Is formed by bending a conductive metal plate into a tubular shape and joining both ends in abutting condition, and a notch groove (not shown) corresponding to the connecting wall 27 from the front end to an intermediate position in the longitudinal direction. Is extended. Then, each communication wall 27 is inserted to the depth of each notch groove, the front part of the shield shell 30 is arranged on the outer surface of the small-diameter tube part 25, and the rear part of the shield shell 30 is the front part in the large-diameter tube part 26. It is housed closer.

An outer ring 40 is housed inside the rear part of the shield shell 30. As shown in FIG. 4, the outer ring 40 is provided with a metal conductive portion 4 on a synthetic resin holder 41.
2 is assembled. As shown in FIG.
Is an annular conductive base 43 through which the shielded electric wire 10 can be inserted.
Is provided with a plurality of elastic contact pieces 44 at one end. These elastic contact pieces 44 are equally arranged in the circumferential direction of the conductive base 43 with a predetermined space therebetween, and extend obliquely outward from the conductive base 43. Also, the elastic contact piece 4
4 has a curved surface 45 formed by bending its tip inward so as to smoothly contact the inner surface of the shield shell 30.

As shown in FIG. 6, the holder 41 has a plurality of locking claws 47 at one end of an annular holder base 46 through which the shielded electric wire 10 can be inserted. These locking claws 47
Are arranged at regular intervals in the circumferential direction of the holder base 46, and are provided with arrowhead-shaped locking projections 48 on the inside of the distal end of an arm 47 A extending in the axial direction of the shielded wire 10 from the holder base 46. Is provided. A guide surface 48A that faces obliquely inward is provided on the distal end side of the arm 47A of the locking projection 48, and the base end side of the arm 47A of the locking projection 48 stands vertically from the arm 47A. Locking surface 48B is provided.

A small cylinder 49 is concentrically arranged inside the holder base 46 at the end opposite to the locking claw 47 and is connected to the end by a front wall 46A of the conduction base 43. On the rear end side of the body 49, an annular gap 46B with the conduction base 43 is open. Then, as shown in FIG. 4, the conductive base portion 4 of the conductive portion 42 is provided in the annular gap 46B.
3 are accommodated, each elastic contact piece 44 extends along the gap between the locking claws 47 of the holder 41, and the tip of the elastic contact piece 44 projects sideways from the locking claw 47. Further, as shown in FIG. 8, the small cylindrical body 49 is
Has an inner diameter fitted to the outer surface of the inner insulating layer 12.

Next, the operation of the present embodiment will be described below together with the procedure for assembling the shield connector to the terminal portion of the shielded electric wire 10. First, as shown in FIG. 1A, the rubber stopper 10 </ b> A and the rubber stopper 10 </ b> B are fitted to the outer sheath 14 of the shielded electric wire 10, and the inner ring 50 is attached to the outer end of the outer sheath 14. Inner ring 50
Is attached to the shielded electric wire 10 from the flange 52 side, the non-slip projection 53 is pushed out by the outer sheath 14, and the narrowed end 51 is abutted against the tip of the outer sheath 14. Here, even if the inner ring 50 receives a force in the return direction, the anti-slip projections 53 bite into the outer sheath 14 and regulate the movement of the inner ring 50, so that the inner ring 50 does not shift after being mounted. . After the inner ring 50 is attached, as shown in FIG.
The shield layer 13 is folded back toward the outer sheath 14 so as to cover the outside of the inner ring 50.

Next, the outer ring 40 is inserted into the shielded electric wire 10 from the locking claw 47 side and moved to the inner ring 50 side (see FIG. 7). Then, the locking projection 48 provided at the tip of the locking claw 47 passes through the exposed portion of the shield layer 13 and abuts on the flange 52 of the inner ring body 50. The sliding contact between the guide surface 48A and the flange 52 causes the arm 47A of the locking claw 47 to expand and deform. When the outer ring 40 is further pushed in, the narrow end 51 of the inner ring 50 is pressed against the rising portion of the elastic contact piece 44 provided on the outer ring 40, and the shield layer 13 is sandwiched between the two. At this point, the locking projection 48 rides over the flange 52 and the arm 47A is restored, and as shown in FIG.
Lock to 2. Here, the elastic contact piece 44 and the narrow end 51
Are formed diagonally, the shield layer 13 between them is tightened with the pressing of both, and the conductive layer is reliably connected to the elastic contact piece 44. Also, as shown in the figure, in this state, the small tubular body 49 of the outer ring body 40 is fitted to the inner insulating layer 12 of the shielded wire 10 and is stabilized.

Next, the conductor 1 at the tip of the shielded wire 10
1, the terminal fitting 15 is crimped, and the distal end of the shielded electric wire 10 is inserted into the inside of the housing 21. Then, the terminal fitting 15 is inserted into the cavity 25A, and the lance 22 is inserted.
As a result, the outer ring body 40 is fitted inside the shield shell 30. Thereby, outer ring 4
The end of the elastic contact piece 44 protruding outward from the outer surface of the shield layer 30 comes into contact with the shield shell 30, so that the shield layer 13 and the shield shell 30 are conductively connected via the conductive portion 42 (FIG. 9).
reference). Here, the elastic contact piece 44 is provided on the shield shell 3.
By being slightly bent inward by 0, the elastic contact piece 44 is more strongly pressed against the shield layer 13 and reliably connected. Also, at the tip of the elastic contact piece 44,
Since the curved surface 45 is provided, the shield shell 30
Pressed smoothly into the inside.

Finally, the rubber stopper 10A is pushed into the housing 21 together with the rubber stopper 10B to complete the assembly of the shield connector.

As described above, according to the shield connector of the present embodiment, since the shield layer 13 and the shield shell 30 can be electrically connected without the need for crimping work, workability is good. Further, the shield layer 13 of the shielded electric wire 10 is held in a state sandwiched between the inner ring body 50 and the outer ring body 40, and the shield layer 13 can be securely brought into contact with the conductive portion 42 without escaping. Layer 13
The reliability of conduction between the shield shell 30 and the shield shell 30 is improved.

<Second Embodiment> The shield connector of the present embodiment is different from the first embodiment only in that the holder 41 of the first embodiment is formed of a conductive resin (for example, a compound of a synthetic resin and a conductive fiber). This is different from the shield connector of the first embodiment. With such a configuration, noise from the gap between the shield shell and the shielded electric wire can be cut off by the holder, and the shielding effect is improved. In addition, since the holder electrically secures a wide portion for electrically connecting the shield layer and the shield shell, the effect of increasing the reliability of the electrically conductive connection is obtained.

<Other Embodiments> The present invention is not limited to the above embodiments. For example, the following embodiments are also included in the technical scope of the present invention.
In addition to the following, various changes can be made without departing from the scope of the invention. (1) Although the outer ring body 40 of the above embodiment is composed of the holder 41 made of synthetic resin and the conductive part 42 made of metal,
For example, the outer ring body may be formed of a metal member without providing a synthetic resin holder, and the elastic contact piece and the locking claw may be integrally formed on the metal member. (2) In the above-described embodiment, the shield layer 13 is folded and the inner ring 50 is disposed inside the shield layer 13. However, for example, the shield layer is extended from the tip of the outer sheath (FIG. 1).
(A)), a configuration may be adopted in which a cylindrical inner ring is mounted on the inner side, and a shield layer is held between the inner ring and the outer ring.

[Brief description of the drawings]

FIG. 1 is a side view of a terminal portion of a shielded wire according to a first embodiment.

FIG. 2A is a side cross-sectional view of the inner ring. FIG. 2B is a rear view of the inner ring.

FIG. 3 is a side sectional view before a shield connector is assembled.

FIG. 4A is a side cross-sectional view of the outer ring. FIG. 4B is a rear view of the outer ring.

FIG. 5A is a side sectional view of a conductor, and FIG. 5B is a rear view of the conductor.

FIG. 6A is a side sectional view of the holder. FIG. 6B is a rear view of the holder.

FIG. 7 is a side cross-sectional view before the outer ring is attached to the shielded electric wire.

FIG. 8 is a side sectional view showing a state in which an outer ring and an inner ring are attached to a shielded electric wire.

FIG. 9 is a side cross-sectional view showing a state where the shield connector has been assembled.

FIG. 10 is a perspective view showing a shield shell provided in a conventional shield connector.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 ... Shield electric wire 13 ... Shield layer 14 ... Outer sheath 21 ... Connector housing 30 ... Shield shell 40 ... Outer ring 41 ... Holder 42 ... Conduction part 43 ... Conduction base 44 ... Elastic contact piece 46 ... Holder base 47 ... Locking claw 50: inner ring 52: flange 53: anti-slip projection

Claims (6)

[Claims] 1. A connector housing, wherein a shield shell for covering a terminal portion of a shielded wire is provided in a connector housing, and a shield layer of the shielded wire exposed at the terminal portion is electrically connected to the shield shell. An inner ring attached to the inside of the exposed portion of the shield layer of the shielded electric wire; and an outer ring attached to the outside of the exposed portion of the shield layer to sandwich the shield layer between the inner ring. A shield connector comprising: an outer ring body locked in a state; and a conducting portion that elastically contacts the shield shell and conducts between the shield shell and the shield layer. 2. The outer ring body is provided with a synthetic resin holder that holds the conductive part and is locked to the inner ring body, and a part of the conductive part is formed on an outer surface of the holder. The shield connector according to claim 1, wherein the shield connector is protruded so as to elastically contact the shield shell. 3. The holder includes an annular holder base,
A plurality of locking claws arranged along the circumferential direction of the holder base and extending in the axial direction of the shielded wire, and the ends of which are locked to a flange provided at one end of the inner ring. The conductive portion includes an annular conductive base held by the holder base, and a plurality of elastic contact pieces extending from the conductive base along the gap between the locking claws and protruding toward the shield shell. 3. The apparatus according to claim 2, wherein
The shield connector described. 4. The inner ring body according to claim 1, wherein the inner ring body is provided with a non-slip projection projecting from an inner peripheral side thereof and biting into the shielded electric wire. Shield connector. 5. The shielded electric wire is provided with an outer sheath covering the outside of the shield layer, and an exposed portion of the shield layer is folded back so as to cover a distal end outer surface of the outer sheath. The shield connector according to any one of claims 1 to 4, wherein the inner ring is arranged inside a layer. 6. The shielded connector according to claim 2, wherein the holder is formed of a conductive resin.