JP2000164302A - Connector for shield wire - Google Patents

Abstract

PROBLEM TO BE SOLVED: To connect a shield layer and a shield cylindrical body to each other freely to be slid without generating a clearance between them and without requiring a dimensional accuracy by arranging an end of a shield layer of a shield wire in the periphery of an elastic ring, and inserting the end of the shield layer of the shield wire into the shield cylindrical body, and pushing it to the inner surface. SOLUTION: The sheath of a shield wire 1 is peeled at an end thereof so as to expose a shield layer 1b and an insulated core 1a, and this exposed end is inserted into a connector formed of an insulating housing 6 and a shield cylindrical body 7, and the insulated cord 1a is connected to a terminal 2 fixed inside the insulating housing 6, and the shield layer 1b is connected to the shield cylindrical body 7. An end of the shield layer 1b is folded, and wound around an elastic ring 3 made of silicon rubber and fitted on the periphery of the insulated core 1a. This part of the elastic ring 3 is inserted into the shield cylindrical body 7 so as to be elastically changed, and the end of the shield layer 1b is pushed to the inside of the shield cylindrical body 7 by the reaction force thereof.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a connector used for connecting a shielded electric wire having a shield layer on the outer periphery of an insulated core wire.

[0002]

2. Description of the Related Art A shielded wire connector has a shield tube for shielding the inside of the connector, and this shield tube needs to be electrically connected to a shield layer of a shielded wire.

[0003] For this reason, Japanese Patent Application Laid-Open No. 8-250219 discloses that a shield layer (shield braid) is folded over an outer jacket (insulating coating) at the end of a shielded wire, and a cylindrical contact is formed on the folded shield layer. A connector is disclosed in which a shield tube (metal shell) is slidably fitted to the contact by crimping to electrically connect the shield layer and the shield tube.

In this type of connector, the reason why the contact on the shield layer and the shield cylinder are slidably fitted is that the contact is crimped on the shield layer and the tip of the insulated core wire is crimped. This is because the accuracy of the relative position in the longitudinal direction with respect to the terminal can be set loosely. Even if the contact and the terminal are attached with high accuracy, the shield layer slides on the insulated core wire with a small force, so that the position of the contact is easily shifted, and the accuracy of the relative position between the contact and the terminal is not improved. Have difficulty.

[0005]

The conventionally proposed shielded wire connector has the advantage that the contact and the terminal can be loosely fitted by slidably fitting the contact and the shield cylinder. However, the outer diameter of the contact and the inner diameter of the shield cylinder require high dimensional accuracy. This is because if the outer diameter of the contact is too small relative to the inner diameter of the shield cylinder, a gap is formed between the two and the shielding performance deteriorates, and the outer diameter of the contact is larger than the inner diameter of the shield cylinder. If it is too long, the fitting state between the two becomes too tight, and it becomes impossible to slide smoothly. The requirement of high dimensional accuracy for the contact and the shield cylinder in this way means that the processing cost for the contact and the shield cylinder increases accordingly, which is a factor of high cost.

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

[0007]

In order to achieve this object, a shielded wire connector according to the present invention comprises an elastic ring externally fitted around a shield layer of a shielded wire or an outer periphery of an insulated core wire.
The end of the shield layer is arranged on the outer periphery of the elastic ring, and the portion of the elastic ring having the end of the shield layer arranged on the outer periphery is inserted into the shield cylinder of the connector housing to elastically deform the elastic ring. The end of the shield layer is pressed against the inner surface of the shield cylinder by the repulsive force of the elastic ring caused by the elastic ring.

[0008]

Embodiments of the present invention will be described below in detail with reference to the drawings. [Embodiment 1] FIG. 1 shows an embodiment of the present invention. In the figure, 1 is a shielded wire, 1a is an insulated core wire of the shielded wire 1, 1b is a shield layer (usually a braided conductor),
Reference numeral 2 denotes a terminal crimped to the conductor at the tip of the insulated core wire 1a, and reference numeral 3 denotes an elastic ring externally fitted to the shield layer 1b. The elastic ring 2 is made of an elastic material such as silicon rubber.
The distal end of the shield layer 1 b is folded and disposed on the outer periphery of the elastic ring 2. The cross-sectional shape of the elastic ring 2 is desirably a circle having a hole at the center through which the insulated core wire 1a with the shield layer 1b passes.

Reference numeral 4 denotes an insulating stopper ring disposed on the distal end side of the elastic ring 3, 5 denotes an insulating rear holder disposed on the rear end side of the elastic ring 3, 6 denotes an insulating housing for housing the terminal 2, Reference numeral 7 denotes a shield cylinder made of a conductive material such as a metal.

The front end 7a of the shield cylinder 7 accommodates the insulating housing 6 therein so that the cross section may be rectangular, but the rear end 7b receives the elastic ring 3 having the end of the shield layer 1b arranged on the outer periphery. It is formed in a cylindrical shape. The outer diameter of the elastic ring 3 and the inner diameter of the shield cylinder 7 are equal to the elastic ring 3.
When the elastic ring 3 is inserted into the shield cylinder 7, the elastic ring 3 undergoes an appropriate elastic deformation, so that the end portion of the shield layer 1 b on the outer periphery is formed on the inner peripheral surface of the shield cylinder 7 by the repulsive force. It is set so that it can be pressed by pressing force. As a result, the shield layer 1b and the shield cylinder 7 can be electrically connected in a slidable state in the longitudinal direction.

The stopper ring 4 reliably insulates between the terminal 2 and the shield layer 1b so that a part of the shield layer 1b does not inadvertently extend forward and comes into contact with the terminal 2, and has an elasticity. This restricts the ring 3 from moving forward (toward the terminal 2). The rear holder 5 restricts the elastic ring 3 from moving backward, and
The rear end opening of the shield cylinder 7 is closed to prevent dust and the like from entering the inside of the shield cylinder 7.

Next, a procedure for assembling the connector having the above configuration will be described. First, the jacket at the end of the shielded electric wire 1 is peeled to expose the shield layer 1b. Thereafter, the rear holder 5 is externally fitted, and further the elastic ring 3 is externally fitted. Then, the end of the shield layer 1b is folded back on the elastic ring 3. Shield layer 1
If the rear holder 5 gets in the way when turning back b,
The rear holder 5 is made of soft rubber. First, the rear holder 5 is arranged on the jacket of the shielded electric wire 1, then the elastic ring 3 is fitted over the outer ring, the shield layer 1b is folded on the elastic ring 3, and then the rear holder 5 is moved to the position shown in the figure. It is good to pull back to. Also, the rear holder 5 is divided into two, and the shield layer 1b
May be folded over the elastic ring 3, and then the split rear holder 5 may be put on and these may be connected to each other.

After the shield layer 1b is disposed on the elastic ring 3, the stopper ring 4 is attached, and the insulating core 1
The conductor is exposed by peeling off the insulating coating at the end of a, and the terminal 2 is crimped to the conductor. Next, after inserting the terminal into the insulating housing 6 and holding the terminal 2 so as not to be pulled out by the projection 6a of the elastic tongue, the part from the insulating housing 6 to the elastic ring 3 is inserted into the shield cylinder 7. Then, the end of the shield layer 1b is elastically deformed into the elastic ring 3 by the shield cylinder 7
And the shield layer 1b and the shield cylinder 7 are electrically connected. The shield cylinder 7 has a step 7c on the inner surface engaged with the shoulder 6b of the insulating housing 6, a projection 7d on the inner surface engaged with the end surface of the insulating housing 6, and a projection 7e on the outer surface formed on the inner surface of the rear holder 5. To engage the part,
Each part is kept in place.

[Embodiment 2] FIG. 2 shows another embodiment of the present invention. In this connector, the end of the shield layer 1b is enlarged in diameter, the elastic ring 3 is externally fitted to the insulated core wire 1a, and the end of the shield layer 1b is arranged on the outer periphery of the elastic ring 3. The other configuration is the same as that of the first embodiment, and thus the same portions are denoted by the same reference numerals and description thereof will be omitted.

[0015]

As described above, according to the present invention, the shield layer of the shielded electric wire is electrically connected to the shield cylinder by the repulsive force based on the elastic deformation of the elastic ring. Even if dimensional accuracy is not required, the shield layer and the shield cylinder can be slidably connected without any gap between them. Therefore, the cost of the shielded wire connector can be reduced.

[Brief description of the drawings]

FIG. 1 is a sectional view showing one embodiment of a connector of the present invention.

FIG. 2 is a sectional view showing another embodiment of the connector of the present invention.

[Explanation of symbols]

 1: Shielded electric wire 1a: Insulated core wire 1b: Shield layer 2: Terminal 3: Elastic ring 4: Stopper ring 5: Rear holder 6: Insulated housing 7: Shield cylinder

Claims (1)

[Claims] An elastic ring is externally fitted on the outer periphery of a shield layer or an insulated core wire of a shielded electric wire, an end of the shield layer is arranged on the outer periphery of the elastic ring, and an end of the shield layer is arranged on the outer periphery. The elastic ring is inserted into the shield cylinder of the connector housing to elastically deform the elastic ring, and the end of the shield layer is pressed against the inner surface of the shield cylinder by the repulsive force of the elastic ring. Connector for shielded wires.