JP3396628B2 - Shield connector - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a shield connector with improved terminal treatment of shielded electric wires.

[0002]

2. Description of the Related Art Conventionally, as a shielded connector, one disclosed in Japanese Patent Application Laid-Open No. 6-260246 is known. As shown in FIG. 8, this shield connector is provided with a cylindrical shield shell c so as to cover the terminal accommodating chamber b in the housing a. The terminal accommodating chamber b can accommodate a flat terminal g crimped to the core wire e of the shielded electric wire d.
The shield shell c has a shell connection part i provided at a shell connection terminal h connected to the braided wire f of the shielded wire d.
The core wire e is shielded inside and outside the housing a by contacting with each other. As shown in FIG. 9, the shell connection portion i of the shell connection terminal h is provided with a plurality of elastic contact pieces j, and the open end portion k of the elastic contact piece j is expanded to be elastically deformable. ing.

[0003]

By the way, the elastic contact piece j provided in the shell connection portion i has a restriction on the size of the shell connection portion i. Therefore, even if the contact pressure is insufficient, the elastic contact piece j is small. The elastic force could not be increased by increasing j beyond the limit. Further, the shielded electric wire d is transported in a wound state before being connected to the shielded connector, but when the shielded electric wire d is wound, an open end portion protruding outside the shell connection portion h is formed. k might damage the surface of the shielded electric wire d.

Further, depending on the shape of the housing a, the shield shell c may have a rectangular tube shape. In such a case, in order to keep a good contact state with the shield shell c, the shape of the shell connecting portion i also needs to be square. However, the flat terminal g has an insertion directionality with respect to the terminal accommodating chamber b, and the shell connection portion i of the shell connection terminal h has an insertion directionality with respect to the rectangular cylindrical shield shell c. Will have. Therefore, when connecting both terminals g and h to the shielded electric wire d, the other terminal is connected to the connection position in the circumferential direction of the one terminal that is connected first.
Since it is necessary to accurately align the connection positions, the work of connecting the terminals to be installed later becomes complicated and the work efficiency is poor. The present invention has been completed to solve the above problems.

[0005]

As a means for achieving the above object, the invention of claim 1 provides a core wire, an insulating layer covering the outer peripheral portion of the core wire, and a braided wire covering the outer periphery of the insulating layer. The shielded wire consisting of an insulating coating arranged on the outer periphery of the braided wire includes a terminal fitting connected to the core wire, a shield shell provided inside the housing when the shielded wire is inserted into the housing, and a braided wire. A shell connecting terminal capable of connecting to a wire is attached, and the shell connecting terminal is crimped to the braided wire and has a substantially U-shaped braided wire connecting portion and the bottom surface of the braided wire connecting portion communicate with each other. And a shell connecting portion which is continuous in the length direction through a portion and is formed in a substantially U-shape larger than the braided wire connecting portion and which is crimped in an annular shape with respect to the insulating coating. Elastic tongue which contacts the outer peripheral surface of the shell connecting portion is provided in the circumferential, the said elastic tongue Chez
The contact position with the shell connection is within the length of the shell connection.
The feature is that the configuration is set to . The invention of claim 2 is characterized in that, in the invention of claim 1, the terminal fitting has a direction of insertion into the terminal accommodating chamber, and the shield shell is formed in a rectangular tube shape. .

The invention of claim 3 is based on the invention of claim 1 or 2.
Facing the inside of the shield shell in the shape of a square tube
On the surface where the pair of elastic tongues are provided
It has characteristics.

[0007]

<Invention of Claim 1><Invention of Claim 1> In the conventional structure in which the elastic contact piece is provided on the shell connection portion side, the size of the elastic contact piece is limited due to the restriction of the size of the shell connection portion. On the other hand, in the present invention, since the elastic tongue is provided on the shield shell side, the elastic tongue can be set to be relatively large, and the elastic tongue has a large elastic force, so that the shell connection is more stable. Part can be held. Further, in the conventional structure, the elastic contact piece provided in the shell connection portion is formed so that the open end thereof is projected outward, whereas in the present invention, it is necessary to provide the elastic contact portion in the shell connection portion. Since the open end is not formed unlike the conventional structure, the surface of the shielded wire is less likely to be damaged when the shielded wire is wound for transportation etc. before connecting the shielded wire to the shielded connector. Has been done. In addition, the bottom of the U-shaped shell connection
After placing the shielded wire with the exposed braided wire on the
Connect the shell connection part to the braided wire by caulking
Easy to connect shell connection because you can
Can be done.

<Invention of Claim 2> When the shape of the shield shell is a rectangular tube, the shell connection terminal can be an annular one instead of the conventional rectangular shape, and the corner of the shell connection portion can be used. It is possible to eliminate the insertion directionality with respect to the cylindrical shield shell. Thereby, when connecting the terminal fitting having insertion direction to the terminal accommodating chamber in the housing and the shell connection terminal to the shielded electric wire, the other terminal is irrespective of the circumferential connection position of the terminal connected first. Since it is possible to connect the two terminals, it is possible to easily connect both terminals.

< Invention of Claim 3> Since the shell connecting portions can be elastically held from the opposing surface sides in the rectangular tubular shield shell,
The contact pressure on the shell connection can be further increased.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of the present invention will be described below with reference to FIG.
Through FIG. 7. In this embodiment, the case where it is applied to a shield connector on the male side is shown. As shown in FIGS. 1 and 2, this shielded connector has a square tube shield shell 60 in a male side connector housing 1 (hereinafter referred to as a housing) formed in a square tube shape.

The housing 1 is formed as a double cylinder structure in which an inner cylinder portion 3 is integrally molded with a synthetic resin material inside an outer cylinder portion 2. The inner tubular portion 3 is located at a substantially central portion in the front-rear (left-right) direction of the housing 1, and the support portion 4 provided at the front end portion is connected to the outer tubular portion 2.
A square tube shield shell 60, which will be described later in detail, is attached between the outer tubular portion 2 and the inner tubular portion 3, and a terminal housing chamber 5 capable of housing the flat male terminal 40 is provided inside the inner tubular portion 3. It is provided. The terminal accommodating chamber 5 is formed by laterally dividing it into three chambers with a side wall 6 therebetween, and each chamber has a substantially rectangular cross-sectional shape. Lances 7 are provided so as to project from the lower surface on the front end side. Has been. A bending space 8 is provided below each lance 7, and each lance 7 can be elastically deformed into the bending space 8 below by a flat male terminal 40 inserted into the terminal accommodating chamber 5. .

A fitting recess 9 into which a female housing (not shown) can be fitted is formed in the front (right side) of the inner cylindrical portion 3, and a front retainer 20 is provided from the front of the fitting recess 9.
Can be attached. A bending restriction piece 21 is provided on the rear surface of the front retainer 20 and is inserted into the above-described bending space 8 to restrict the bending deformation of the lance 7. A rib 22 is provided so as to assist fitting with the housing on the side.

A terminal accommodating chamber 5 is provided behind (on the left side of) the inner cylindrical portion 3.
A shell connection terminal accommodating chamber 10 is formed in communication with the partition plate 1 formed so as to project rearward from the inner cylindrical portion 3.
It is divided into three chambers by 1 like the terminal accommodating chamber 5. At the rear of the shell connection terminal accommodating chamber 10, an opening 12 is provided which is open to the outside of the housing 1,
A collective rubber plug 23 provided with press-fitting holes 24 into which three shielded electric wires 30 can be press-fitted as shown in FIG. 4 is fitted therein. Further, the back surface of the housing 1 is covered with a back retainer 25 from the rear of the opening 12 to close the opening 12. The back retainer 25 is provided with an insertion hole 26 for inserting the shielded electric wire 30 and a locking hole 27. The locking hole 27 is provided on the upper and lower sides of the housing 1. It is adapted to be retained on the outer surface of the housing 1 by being locked to 13.

In the shielded electric wire 30 connected to this shielded connector, as shown in FIG. 5, the core wire 31 is the insulating layer 3.
The outer circumference of the insulating layer 32 is covered with a braided wire 33 formed by weaving a conductive metal wire, and an insulating coating 34 is further provided on the outer circumference. The shielded electric wire 30 includes two types of terminals 4 including a flat male terminal 40 and a shell connection terminal 50.
0 and 50 are connected.

As shown in FIG. 6, the flat male terminal 40 has a tab 42 formed at the front of a main body 41 having a locking groove capable of locking the lance 7 of the housing 1 and an addition at the rear. A tightening portion 43 is formed. The crimping portion 43 is crimped to the core wire 31 exposed by peeling off the insulating layer 32 of the shielded electric wire 30, so that the flat male terminal 40 is connected to the core wire 31. Further, since this flat male terminal 40 has a flat shape, it has an insertion directionality in the circumferential direction with respect to the terminal accommodating chamber 5 having a substantially rectangular cross section.

As shown in FIG. 5, the shell connecting terminal 50 is formed by dividing a metal plate into two parts and forming a U-shape having different sizes. The smaller side of the two U-shaped parts is connected to the braided wire. Part 51, and the larger side is the shell connection part 52.
It is configured such that they are communicated with each other by the communication section 53. The braided wire connecting portion 51 is attached to the braided wire 33 exposed by removing the insulating coating 34, and the shell connecting portion 52 is provided behind the braided wire connecting portion 51 with the insulating coating 3
4 are attached to each other, and each is formed into an annular shape by a jig (see FIG. 6). Also, the braided wire 33
The shell connection portion 52 and the shell connection portion 52 are electrically connected by the connection portion 53.

Here, the structure of the rectangular tube shield shell 60 will be described in detail. The rectangular shield shell 60 is shown in FIG.
As shown in, a conductive metal plate is formed in a rectangular tube shape.

A fitting portion 61 provided at the front end of the rectangular shield shell 60 is arranged so as to pass through the supporting portion 4 and project into the fitting concave portion 9 at the front when being attached to the housing 1. Thus, the insertion grooves 62 are formed at six locations. Protrusions 63 are provided at a plurality of positions at the tip of the fitting portion 61 by tapping to increase the contact pressure when the fitting portion 61 and the shield shell provided in the female housing are fitted together. It is designed to be used. Slightly rearward of the fitting portion 61, locking pieces 64 are formed in a cantilever manner from the front toward the inside at two locations on each of the upper and lower surfaces, and are attached to the inner tubular portion 3 when mounted in the housing 1. It is adapted to be engaged with the provided engaging portion 14 (see FIG. 1).

A plurality of elastic tongues 65 are provided on the inner circumference of the rear end portion of the rectangular tube shield shell 60. The elastic tongue piece 65 is formed by folding back an extending piece formed by extending rearward from the rear end edge of the rectangular tube shield shell 60 and folding it back inside the rectangular tube shield shell 60. It is formed in a mountain shape with 66 as an apex, and the end portion 67 is arranged with a slight distance from the inner peripheral surface, whereby the elastic tongue piece 65 is elastically deformable.
Further, the elastic tongue piece 65 is arranged in the housing 1 at the rear end portion of the shell connection terminal accommodating chamber 10. Further, a regulation piece 68 is formed by being cut out from the inner peripheral surface of the portion covered by the elastic tongue piece 65, and the regulation piece 68 is formed at a distance from the central portion 66 of the elastic tongue piece 65. Excessive bending deformation of the piece 65 can be regulated.

Three elastic tongues 65 having such a shape are provided side by side in the lateral direction on the lower surface of the rectangular tube shield shell 60, and three are similarly arranged on the upper surface, which is the opposite surface of the lower surface. It is provided in. At this time, the width between the central portions 66 of the upper and lower elastic tongues 65 is set to be smaller than the width of the shell connecting portion 52 of the shell connecting terminal 50 (see FIG. 3).

The present embodiment has the structure as described above, and subsequently the assembling procedure will be described. First, as shown in FIG. 4, the shield wire 30 is inserted into the insertion hole 2 of the back retainer 25.
6 and the press-fitting hole 24 of the collective rubber plug 23, the insulating layer 32 and the insulating coating 34 are removed, and the shell connection terminal 50
And the flat male terminal 40 are sequentially attached.

To attach the shell connecting terminal 50, as shown in FIG. 5, the portion of the braided wire 33 of the shielded electric wire 30 is the bottom of the braided wire connecting portion 51 of the shell connecting terminal 50, and the portion of the insulating coating 34 is the shell. They are located at the bottoms of the connecting portions 52, respectively. Then, the braided wire connecting portion 51 and the shell connecting portion 52 are respectively crimped using a jig. This allows
As shown in FIG. 6, the braided wire connecting portion 5 having a U-shape
1 and the shell connection portion 52 are formed in an annular shape,
It is easily attached to the braided wire 33 and the insulating coating 34, respectively.

Subsequently, the caulking portion 43 of the flat male terminal 40 is caulked to the core wire 31 of the shielded electric wire 30, so that the flat male terminal 40 is attached to the shielded electric wire 30. At this time, the shell connection portion 52 attached in front of the flat male terminal 40 is formed in an annular shape, and the square tube shield shell 6
Since the directionality in the circumferential direction is not a problem when connecting to the elastic tongue piece 65 of 0, the work of connecting the flat male terminal 40 should be performed without worrying about the circumferential connection position of the shell connection terminal 50. You can

Then, as shown in FIG. 3, the shielded electric wire 30 having both terminals attached thereto is inserted into the housing 1 having the rectangular tube shield shell 60 attached thereto. The flat male terminal 40 is inserted into the terminal accommodating chamber 5 through the opening 12 on the rear end side of the housing 1 while aligning the circumferential insertion direction.
The insertion of the shielded wire 30 is completed when the tab 42 projects into the fitting recess 9 and the lance 7 of the housing 1 is locked in the locking groove of the main body 41.

Here, the shell connecting portion 52 of the shell connecting terminal 50 is provided so as to face the upper surface and the lower surface of the rectangular tube shield shell 60 when being inserted into the shell connecting terminal accommodating chamber 10 from the opening 12. The elastic tongues 65 are brought into contact with the central portions 66 of the elastic tongues 65 and elastically deformed in the vertical direction. Thereby, the shell connecting portion 52
It is sandwiched between the central portions 66. At this time, the shell connecting portion 52 is stably held by the elastic force of both elastic tongues 65, and the stable connected state is maintained. The braided wire 33 of the shielded electric wire 30 is electrically connected to the rectangular tube shield shell 60 via the shell connection terminal 50, and the core wire 31 is reliably shielded even in the housing 1.

After the shielded electric wire 30 is inserted into the housing 1, as shown in FIG. 2, the collective rubber plug 23, the back retainer 25, and the front retainer 20 are attached to the housing 1 to complete the assembly of the shield connector. It

As described above, according to this embodiment,
Since the elastic tongue 65 is provided on the square tube shield shell 60,
An annular one can be used as the shell connecting portion 52 of the shell connecting terminal 50 that connects the square tubular shield shell 60 and the braided wire 33 of the shielded electric wire 30. The shell connecting portion 52 can be inserted in the inserting direction of the square tubular shield shell 60. You can eliminate the sex. Thereby, when sequentially connecting the shell connection terminal 50 and the flat male terminal 40 to the shielded wire 30, it is not necessary to consider the circumferential connection position of the shell connection terminal 50 when connecting the flat male terminal 40, Connection work can be simplified. The connection sequence at this time is reversed, and the flat male terminal 40 is followed by the shell connection terminal 50.
The same effect can be obtained even when connecting.

The size of the elastic tongue 65 provided on the rectangular tube shield shell 60 can be set to any size as long as it does not hinder the insertion of the shield wire 30, so that the elastic tongue 65 has a relatively large elasticity. The force can be applied, and the shell connection portion 52 can be held in a more stable state. Further, even when the shielded electric wire 30 is wound with the shell connecting terminal 50 attached, the shell connecting portion 52
Has a shape that does not have a protruding portion to the outside, so that the insulating coating 34 of the shielded electric wire 30 is less likely to be damaged.

Further, since the elastic tongues 65 are provided so as to face each other from the upper and lower surfaces of the rectangular tube shield shell 60, the contact pressure with respect to the shell connecting portion 52 is increased and the shell connecting portion 52 is securely held. Therefore, stable contact can be obtained even when vibration or shock is applied.

<Other Embodiments> The present invention is not limited to the embodiments described above and illustrated in the drawings. For example, the following embodiments are also included in the technical scope of the present invention. In addition to the above, various modifications can be made without departing from the scope of the invention. (1) In the above-described embodiment, the male-side shield connector is shown, but the present invention can of course be applied to the female-side shield connector. (2) The present invention can be applied to the case where the elastic tongue is provided only on one side. (3) The present invention can also be applied to the case where the elastic tongue piece is provided on one of the opposing inner surfaces of the rectangular cylindrical shield shell and the contact piece that does not elastically deform is provided on the other.

[Brief description of drawings]

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

FIG. 2 is a sectional view of the shielded connector after assembly.

FIG. 3 is a partially cutaway side view showing an operation of inserting a shielded electric wire into a housing.

FIG. 4 is a perspective view showing a state in which the shielded electric wire is inserted through the back retainer and the collective rubber stopper.

FIG. 5 is a perspective view showing an operation of placing a shielded electric wire on a shell connection terminal.

FIG. 6 is a perspective view of a shielded electric wire to which a shell connection terminal and a flat male terminal are attached.

FIG. 7 is a partially cutaway perspective view of a square tube shield shell.

FIG. 8 is a partially cutaway side view of a conventional shield connector.

FIG. 9 is a perspective view of a shell connection terminal.

[Explanation of symbols]

1 ... Housing 5: Terminal accommodating chamber 30 ... Shielded wire 31 ... Core wire 33 ... Braided wire 40 ... Flat male terminal (terminal fitting) 43 ... Crimping part 50 ... Shell connection terminal 51 ... Braided wire connection part 52 ... Shell connection 60 ... Square tube shield shell (shield shell) 65 ... Elastic tongue 66 ... central part 67 ... end

─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Tetsuo Ichioka 1-7-10 Kikuzumi, Minami-ku, Nagoya-shi, Aichi Harness Institute of Technology Co., Ltd. (56) Reference JP-A-6-260246 (JP, A) JP 11-185888 (JP, A) JP 6-163116 (JP, A) JP 11-40273 (JP, A) JP 10-162902 (JP, A) JP 7-193966 (JP, A) JP-A-8-96868 (JP, A) Actual development: 6-82778 (JP, U) (58) Fields investigated (Int.Cl. ⁷ , DB name) H01R 17/04

Claims (3)

(57) [Claims] 1. A shielded wire comprising a core wire, an insulating layer covering the outer peripheral portion of the core wire, a braided wire covering the outer circumference of the insulating layer, and an insulating coating arranged on the outer circumference of the braided wire, which is connected to the core wire. And a shell connection terminal capable of connecting a shield shell and a braided wire provided in the housing when the shielded wire is inserted into the housing, and the shell connection terminal is The braided wire connecting portion which is crimped to the braided wire and has a substantially U-shape, and the bottom surface of the braided wire connecting portion are continuous with each other in the length direction through the connecting portion, and the braided wire connecting portion is substantially U-shaped and is larger than the braided wire connecting portion while comprising a shell connecting portion which is crimped an annular to be formed on the mold the insulating coating, wherein the inner periphery of the shield shell is resilient tongue provided in contact with the outer peripheral surface of the shell connecting portion, wherein Elasticity
The contact position between the piece and the shell connecting portion is the shell connecting portion.
A shielded connector characterized by being set within the length dimension of . 2. The shield connector according to claim 1, wherein the terminal fitting has a direction of insertion into the terminal accommodating chamber, and the shield shell is formed in a rectangular tube shape. 3. The shield connector according to claim 1, wherein a pair of elastic tongue pieces are provided on opposite surfaces in the shield shell having a rectangular tube shape.