JPH0888052A - Shield connector - Google Patents

Abstract

PURPOSE: To improve the workability of assembly. CONSTITUTION: While a tubular shield electrode 20 is inserted from one side of a housing 10, a shield wire 80 installing an attachment 70 is inserted from the other side of the housing 10. As a result, the shield wire 80 is connected to the shield wire 20 through an abutting piece 71b and a base 71a of the attachment 70. Consequently, the shield wire 80 can be connected with the shield wire 20 very easily.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a shield connector.

[0002]

2. Description of the Related Art Conventionally, as this type of shielded connector, one disclosed in Japanese Utility Model Laid-Open No. 4-23081 shown in FIG. 10 is known. In FIG. 10, a cover 1 serving as a shield electrode is formed by bending a single metal plate material into a substantially cylindrical shape, and is connected to a cylindrical cylindrical portion 2 and one open end of the cylindrical portion 2. And a clamp portion 3 which is bent in a U shape so as to open along the axial direction of the cylindrical portion 2. The body 4 is formed as a thinned resin cylindrical body, and has an axial through hole 4a in the center thereof. Further, the cover 1 is formed to have an outer diameter that can be inserted from an opening to which the clamp portion 3 is not connected, and is formed to have a length of about half of the cover 1.

A pin 5 which is formed in a pin shape as a whole and has a crimp portion 5a formed by bending a flat plate into a substantially U shape at one end.
Can be inserted into the through hole 4a of the body 4 and penetrate therethrough. Resin-made cylindrical cap (casing)
Reference numeral 6 denotes a large-diameter opening 6a into which the cover 1 can be inserted at one end.
And has a cable (shield wire) 7 at the other end
Has an opening 6b of a small diameter into which can be inserted. The cable 7 is configured by being laminated coaxially, is provided with a conductor 7a at the center, and is surrounded by an internal wire coating 7b,
The periphery thereof is covered with a braided wire 7c, and the outer periphery is covered with an insulating outer cover 7d.

The shield connector is assembled as follows. The tip of the cable 7 is peeled off in stages, and the conductor 7 at the tip is passed through the opening 6b of the cap 6 in advance.
A is crimped and connected at the crimping portion 5a of the pin 5. The body 4 is inserted into the cylindrical portion 2 of the cover 1 all the way, and the pin 5 is inserted into the through hole 4a of the body 4 from the clamp portion 3 side. At this time, the stripping length is adjusted so that the portion of the braided wire 7c of the cable 7 enters the clamp portion 3. When the clamp part 3 is pressed so as to wind the cable 7, the cover 1 is fixed to the tip of the cable 7, and when the cap 6 is gripped and the cable 7 is pulled, the cover 1 part is pulled into the cap 6 and assembled. Is completed.

[0005]

In the above-mentioned conventional shielded connector, the clamp portion 3 of the cover 1 directly wraps and connects the cable 7, so that one end has a large diameter and the other end has a small diameter. ing. The cap 6 for accommodating this has one end having a large diameter and the other end having a small diameter, and the small-diameter cable 7 must be pulled back from the small-diameter side in advance. That is, there is a problem that the work is inefficient because the work is carried out first and then returned. The present invention has been made in view of the above problems, and an object of the present invention is to provide a shield connector capable of improving workability of assembly.

[0006]

In order to achieve the above-mentioned object, the invention according to claim 1 covers the periphery of a terminal fitting housed inside with a shield electrode, and the outer periphery of an insulation-coated inner wire is a braided wire. In a shielded connector in which the extension wire of a shielded electric wire whose outer periphery is covered with insulation is connected to the terminal fitting and the braided wire is connected to the same shield electrode, the cylindrical shield electrode and the shield electrode are held. And a casing that holds the shielded electric wire inserted therein, and a cylindrical shape that is penetrated by the shielded electric wire and that can be inserted into the shield electrode, and protrudes toward the inner peripheral side to form an outer peripheral surface of the shielded electric wire. The first contact piece group for sandwiching and the second contact piece group projecting to the outer peripheral side and pressing the inner peripheral surface of the shield electrode are integrally formed of a conductive material. There is a configuration which includes the the attachment.

The invention according to claim 2 is based on claim 1.
In the shielded connector according to the item (1), the contact pieces forming the first contact piece group and the second contact piece group are alternately arranged. Further, the invention according to claim 3 is the shield connector according to claim 1 or 2, wherein the attachment is supported by a step portion formed in front of a rubber plug penetrated by the shield wire. There is.

[0008]

In the invention according to claim 1 configured as described above, first, the shield electrode is held in the casing. The attachment is equipped with a first contact piece group consisting of multiple contact pieces facing the inner circumference, so if you insert a shielded wire with the exposed braided wire into this tubular attachment, the shielded wire will From the above, they are abutted by the abutting pieces and are sandwiched substantially in the center. Here, since the attachment only presses the shielded electric wire by the first contact piece group, it can be freely displaced along the shielded electric wire. Hold the shielded wire in the casing from the side of the terminal fitting at the tip, and insert the attachment along the shielded wire inside the shield electrode, the first contact piece group is exposed on the outer peripheral surface of the shielded wire. While conducting with the existing braided wire, the second contact piece group contacts with the inner peripheral surface of the shield electrode on the outer peripheral side to be electrically conductive. Here, the second contact piece group presses the inner wall of the cylindrical shield electrode from each direction, and is held at substantially the center.

Further, in the invention according to claim 2 configured as described above, the abutting piece that abuts the shield wire on the inner peripheral side and the abutting piece that abuts the shield electrode on the outer peripheral side are arranged alternately. Therefore, the force that one contact piece pushes from the inside to the outside is always supported by the shield electrode through the two contact pieces, and the force that one contact piece pushes from the outside to the inside is always two. It is supported by the shielded wire via the contact piece. Further, in the invention according to claim 3 configured as described above, the step portion is formed in front of the rubber plug attached to the shielded wire by the waterproof connector,
The attachment is held by this front step.

[0010]

As described above, according to the present invention, the shield electrode and the shielded electric wire are separately assembled. Therefore, the shield electrode and the shielded electric wire are assembled before they are inserted into the casing as in the prior art. , It can be assembled without complicated hands such as pulling back at the end. In particular, since the tubular attachment is held around the shielded electric wire by itself, it can be easily displaced with respect to the shielded electric wire. Then, the work of holding the shielded electric wire by the casing and the work of attaching the attachment are different, and the work can be performed with a small force as compared with the case of performing them simultaneously.

According to the second aspect of the invention, the shielded electric wire can be easily and stably held in the center of the shield electrode. Further, according to the invention of claim 3, the attachment can be held more stably only by forming the step portion in the rubber plug, and
It can also exert the usual waterproof function.

[0012]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is an exploded perspective view showing a shield connector according to an embodiment of the present invention. The shield connector of this embodiment has a substantially cylindrical housing (casing).
The shield electrode 20, the cap 30, and the rubber seal 40 are attached to one of the openings 10 and the shield electric wire 80 including the terminal fitting 50 and the attachment 70 is inserted from the other opening.

As shown in FIGS. 2 and 3, the housing (casing) 10 is penetrated in the axial direction, and the front portion has a double structure in which the inner cylindrical portion 11 of the central portion is covered with the hood portion 12. . The inner tubular portion 11 has a terminal accommodating chamber 13 into which a female terminal fitting 50 can be inserted, and a mating terminal fitting insertion into which a male terminal fitting can be inserted is provided on the front surface of the terminal accommodating chamber 13. In addition to forming the mouth 13a, a lance 14 having a cantilevered arm shape and a wedge-shaped projection 14a protruding toward the inside of the terminal accommodating chamber 13 is formed on the bottom surface. At a position below the lance 14, there is provided a cut portion 15 formed by cutting from the front surface of the inner tubular portion 11 toward the inner side. When the lance 14 bends downward, the cut portion 15 is provided inside the cut portion 15. enter in.

At the rear end of the housing 10 is a terminal metal fitting insertion portion 16 which is largely opened.
The inner walls of the front end portion 6 of the inner wall portion 6 have communication walls 17a to 17d at the same intervals so that the rear end portion of the inner cylindrical portion 11 is held suspended.
Are formed. Thereby, the shield electrode insertion holes 18a to 18d that are continuous from the outer peripheral surface of the inner tubular portion 11 to the inner peripheral surface of the terminal fitting insertion portion 16 are formed. The four shield electrode insertion holes 18a to 18d form a circular through hole as a whole along the outer circumference of the inner cylindrical portion 11. At the rear end of the inner tubular portion 11, a tubular waterproof seal wall 19a is formed from the inner wall of the hood portion 12 so that the inner tubular portion 11 covers the portion in which the terminal fitting insertion portion 16 is suspended.
Further, a flexible lock arm 19b that engages with and holds the mating connector when the mating connector is fitted and held is provided on the upper surface of the hood portion 12.

The shield electrode (shell) 20 has a cylindrical shape in which a metal plate is bent to have an inner diameter matching the outer diameter of the inner cylindrical portion 11, and as shown in FIG. 1, the shield electrode (shell) faces from the rear end side to the front end side. 4 notches 21 are formed. This notch 2
1 is formed so as to match the widths and intervals of the communication walls 17a to 17d, and when the front end of the inner tubular portion 11 is inserted from the rear end side, the communication walls 17a to 17d enter into the cut 21. . When the communication walls 17a to 17d are inserted until reaching the tip of the cut 21, the shield electrode 20
The rear end is in a state of being inserted into the terminal fitting insertion portion 16.
It should be noted that the cuts 21 are provided near the back of each cut 21.
Wedge-shaped locking claws 22 projecting inward are formed, and when the shield electrode 20 is inserted all the way as described above, the locking claws 22 bite into the communication walls 17a to 17d and the shield electrode 20 Try to prevent it from coming off. The shield electrode 20 is arranged around the inner cylindrical portion 11 along the outer peripheral surface thereof, and inside the terminal fitting insertion portion 16 is arranged along the inner peripheral surface of the terminal fitting insertion portion 16.

The cap 30 has a substantially cap shape capable of covering the tip of the inner cylindrical portion 11. A plate-like double locking piece 31 is formed so as to project on a portion of the inner bottom surface of the cap 30 that faces the cutout portion 15 when mounted, and the double locking piece 31 has the cutout portion. A locking projection capable of engaging with the upper wall surface of 15 is formed. The cap 30 has an inner diameter that matches the outer diameter of the shield electrode 20, and is attachable to the distal end portion of the inner tubular portion 11 to which the shield electrode 20 is attached. Further, four windows 33a to 33d are formed on the side surface at the same intervals, and the windows 33a to 3d are formed.
The shield electrode 20 that covers the inner cylindrical portion 11 is exposed to the outside through 3d. The front ends of the windows 33a to 33d communicate with the front surface of the cap 30, and the shield electrode 20 is exposed from the front end to the side surface. Further, the opening end of the cap 30 is formed with a flange 34 that is expanded in the radial direction, and this flange 34 has a diameter slightly larger than the end portion of the waterproof seal wall 19a. When the ring-shaped rubber seal 40 shown in FIG. 8 is attached to the waterproof seal wall 19a, the flange 34 presses the front end thereof to prevent the rubber seal 40 from coming off. The front side of the cap 30 is also provided with a mating terminal fitting insertion port 35 into which a male terminal fitting can be inserted. On the other hand, the shielded electric wire 80 is formed by coating a core wire, which is an inner conductor, with an insulating material made of resin, the periphery of an inner wire 81, with a braided wire 82, which is an outer conductor, and covering the outermost periphery with a resin, a skin 83. The terminal fitting 50 is crimp-connected to the tip. A rubber plug 60 is attached to the shielded electric wire 80 in advance, and a cylindrical step portion 61 having a small outer diameter is formed at the front end of the rubber plug 60.

The attachment 70 is formed by bending a single metal plate into a substantially cylindrical shape. In the unfolded state, four thin strip-shaped contact pieces 71b are extended from one side edge of the strip-shaped base portion 71a at equal intervals, and the contact pieces 71b are alternately arranged in opposite directions. The base 71a is bent while being folded back. Initially, the base portion 71a is not a perfect tubular shape, and both ends of the base portion 71a are separated as shown in FIG. Then, when caulking as described below, both ends of the base portion 71a are connected as shown in FIG. 5, and the four contact pieces 71b folded back alternately are those facing each other in the same direction (inside, Or outside each other)
It will be folded back to.

Next, the operation of this embodiment having the above structure will be described. On the housing 10 side, the rubber seal 40 is attached to the waterproof seal wall 19a inside the hood portion 12, and the shield electrode 20 is covered from the cut 21 side to the outer periphery of the inner tubular portion 11. Communication walls 17a to 17d and notch 21
The shield electrode 20 is pushed in at the positions of and, and is pushed until the communication walls 17a to 17d reach the deepest part of the cut 21. At this position, the front end of the shield electrode 20 is substantially flush with the front end of the inner cylindrical portion 11, and the locking claws 22 bite into the side surfaces of the communication walls 17a to 17d to prevent the shield electrode 20 from coming off. There is. In this embodiment, the locking claws 22 bite into and fix the side surfaces of the communication walls 17a to 17d, but a lance-shaped claw that rises toward the inner surface of the shield electrode 20 is formed, and the claws are inserted into the shield electrode insertion holes. It may be locked when it enters the terminal fitting insertion portion 16 through the holes 18a to 18d.

Next, the cap 30 is attached to the inner cylinder portion 11 and the tip of the shield electrode 20. The shield electrode 20 is inserted so that the opening surface of the cap 30 faces the inner cylindrical portion 11 side and the shield electrode 20 enters the inside of the cap 30. As the shield electrode 20 is covered, the double locking piece 31 enters into the notch 15 at the tip of the inner tubular portion 11 and is temporarily locked at a position before reaching the lower side of the lance 14. At this position, the double locking piece 31 is not inserted to the lower surface of the lance 14, and the lance 14 can bend downward. This state is shown in FIG. On the other hand, in the shielded electric wire 80, the shielded electric wire 80 is inserted from the side opposite to the step 61 of the rubber plug 60, and the tip portion is peeled off in stages. That is, the core wire of the extension wire 81 is exposed from the tip, the covered portion of the extension wire 81 is exposed, and then the braided wire 82 of the braided wire is exposed. The terminal fitting 50 is crimp-connected to the tip of the extension 81, and the shielded electric wire 80 portion is inserted between the open base portions 71 a of the attachment 70. Abutting pieces (first group of abutting pieces) 71 facing inward
In a state where b faces the exposed braided wire 82, the base portion 71a
The rubber stopper 6 so that it overlaps the step 61 of the rubber stopper 60.
0 is moved, and as shown in FIG. 6, the base portion 71a is caulked from the periphery and fixed on the shielded electric wire 80.

Next, the terminal fitting 50 is inserted from the terminal fitting insertion portion 16 side of the housing 10. Terminal fitting 5
0 is pushed into the terminal accommodating chamber 13 by the corner portion of the front end and pushes down the protrusion 14a of the lance 14. Faced with, Lance 14 returns. The lance 14 is temporarily pushed into the notch 15 until it is restored after being pushed down. The attachment 70 is inserted into the terminal metal fitting insertion portion 16 together with the terminal metal fitting 50, and the abutting piece 71 facing outward is provided.
b contacts the inner peripheral surface of the shield electrode 20.

FIG. 8 shows a vertical sectional view of the shield connector, and FIG. 9 shows a horizontal sectional view of the shield connector. The second contact piece group 71b sandwiches the shielded electric wire 80 from the vertical direction, and the first contact piece group 71b sandwiches the shielded electric wire 80 from the horizontal direction. Each contact piece 71
Since b is staggered inward and outward, the base 7
In 1a, a force tending to bend inward and a force tending to bend outward act alternately and are in a balanced state. When the terminal fitting 50 is further pushed in, the rubber plug 60 is also inserted into the terminal fitting insertion portion 16 and adheres to the inner circumference of the terminal fitting insertion portion 16 on the outer peripheral surface and to the outer peripheral surface of the shielded electric wire 80 on the inner peripheral surface. Adhere closely and waterproof.

As described above, the cylindrical shield electrode 20 is inserted from one side of the housing 10 and the shielded electric wire 80 to which the attachment 70 is attached is attached to the housing 1.
When the shield wire 80 is inserted from the other side of 0, the shield wire 80 is connected to the shield electrode 20 via the contact piece 71b of the attachment 70 and the base 71a. Therefore, the connection with the shield electrode 20 becomes extremely easy. Then, the cap 30 is inserted all the way. Then, the double locking piece 31 advances to the inside of the cut portion 15 and is cut by the locking protrusion.
Since it engages with the groove of the upper wall surface of 5, the cap 30 is prevented from coming off. Since the cap 30 has such a large diameter that it can cover the tip of the shield electrode 20, the cap 30 is prevented from coming off in this way,
The shield electrode 20 is also prevented from coming off.

When the double locking piece 31 enters the notch 15, the lance 14 cannot bend downward.
It is impossible for the terminal fitting 50 to come off unless the lance 14 bends downward once and the projection 14a retracts. Therefore, the double locking piece 31 thus supporting the lance 14 in the cut portion 15 like a hollow can reliably prevent the terminal fitting 50 from coming off. Further, since the flange 34 of the cap 30 is fixed at the end portion of the waterproof seal wall 19a by fixing the cap 30, the rubber seal 40 abuts when the cap 30 is about to come out, so that the cap 30 can be prevented from coming off.

The shield connector having such a structure is provided with a cylindrical shield electrode whose tip is divided into four parts corresponding to the windows 33a to 33d, and a male terminal fitting held in the shield electrode. Connect the connector. The shield electrode is exposed through the windows 33a to 33d. The male terminal fitting is connected to the shield electrode 20, and the male terminal fitting is held in the terminal accommodating chamber 13 by the female terminal fitting 5.
Connect with 0. Although the shield electrode 20 and the shielded electric wire 80 are inserted in different directions in the above-described embodiment, the flexibility in assembling is improved by inserting them separately even when they are inserted from the same direction.

It should be noted that in the above-described embodiment, the attachment 70 is substantially shielded by the rubber plug 60.
Although it is fixed to 0, the second contact piece group 71b can sandwich and hold the shielded electric wire 80 only by caulking without using the rubber plug 60. However, in this case, it is better to increase the number of the contact pieces 71b.
By doing so, only the attachment 70 can be easily displaced alone on the shielded electric wire 80, and the portion of the terminal fitting 50 can be inserted and fixed first, and then the attachment 70 can be displaced and inserted. It is possible to reduce the insertion force. Further, in the above-described embodiment, the base portion 71a is not initially formed in a tubular shape without connecting both ends, but may be bent in a tubular shape from the beginning if it is previously passed, or The shielded electric wire 80 may be formed into a tubular shape and opened when the shielded electric wire 80 is inserted. The number of the contact pieces 71b can be increased not only by four, but also if the shape is made to have a spring property, the shape is not particularly limited. Furthermore, the present invention is not limited to the above-described embodiments, but can be modified without departing from the scope of the invention.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of a shield connector according to an embodiment of the present invention.

FIG. 2 is a sectional view of a housing of the shield connector.

FIG. 3 is a front view of a housing of the shield connector.

FIG. 4 is a front view of the attachment before caulking.

FIG. 5 is a front view of the attachment after caulking.

FIG. 6 is a perspective view showing an assembling state of the tip portion of the shielded electric wire.

FIG. 7 is a cross-sectional view of a shield connector.

FIG. 8 is a cross-sectional view of a shield connector.

FIG. 9 is a partial cross-sectional view of the shield connector.

FIG. 10 is an exploded perspective view of a conventional shield connector.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 ... Housing 11 ... Inner cylinder part 16 ... Terminal metal fitting insertion part 20 ... Shield electrode 21 ... Notch 50 ... Terminal metal fitting 60 ... Rubber stopper 61 ... Step part 70 ... Attachment 71b ... Abutting piece 80 ... Shield wire 81 ... Extension wire 82 ... Braided wire 83 ... Skin

Claims (3)

[Claims] 1. A shielded wire in which the periphery of a terminal fitting housed inside is covered with a shield electrode, the outer circumference of an insulation-coated inner wire is covered with a braided wire, and the outer circumference is insulation-coated. A shield connector in which the braided wire is connected to the metal fitting and the braided wire is connected to the shield electrode, wherein a cylindrical shield electrode, a casing that holds the shield electrode and holds the shield wire by inserting it inside the shield electrode, and the shield A first contact piece group that is penetrated by an electric wire and has a cylindrical shape that can be inserted into the shield electrode, and that protrudes to the inner peripheral side to sandwich the outer peripheral surface of the shield electric wire, and the shield that protrudes to the outer peripheral side. A shield connector comprising: a second contact piece group for pressing the inner peripheral surface of the electrode; and an attachment integrally formed of a conductive material. Ta. 2. The shield connector according to claim 1, wherein the contact pieces forming the first contact piece group and the second contact piece group are arranged alternately. Characteristic shielded connector. 3. The shield connector according to claim 1 or 2, wherein the attachment is supported by a step portion formed in front of a rubber plug penetrated by the shield wire. A shielded connector.