JP3352397B2 - Female terminal fitting - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] The present invention relates to a female terminal fitting.

[0002]

2. Description of the Related Art For example, Japanese Unexamined Utility Model Publication No. Hei 5-27983 discloses a well-known shield terminal (see FIG. 5). As in this publication, the general structure of the shield terminal connected to the end of the shielded wire is a terminal fitting 102 connected to the core wire of the shielded wire, and a terminal fitting 102 connected to the shielded wire. Casing 10
3 between the casing 103 and the terminal fitting 102.
04 is interposed. Further, although not directly related to that of this publication, as shown in FIG. 6, a terminal fitting (female terminal fitting) 1 used for a shield terminal is
In many cases, the elastic contact piece 2 for receiving the male terminal fitting is exposed and the upper surface is opened. The reason for opening the upper surface in this way is that the high frequency characteristics are superior to those of the closed one. In addition, since the elastic contact piece 2 is exposed to the outside, it is necessary to provide the protective portion 3 in front of the exposed portion.

[0003]

However, since the conventional one is formed in a U-shape that opens upward to the protection part 3, the structure is insufficient in strength. Therefore, there is a possibility that deformation may occur when an attempt is made to perform an excessive insertion with the center misalignment occurring during insertion into the cylindrical housing member. The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a female terminal fitting which has a simple structure and improves the strength of a protection portion.

[0004]

In order to solve the above-mentioned problems, a female terminal fitting according to claim 1 is formed by bending a conductive metal plate and has an elasticity capable of elastically contacting the male terminal fitting. Female terminal formed with the contact piece exposed to the outside
In the metal fitting, a protection portion for protecting the elastic contact piece is provided in front of the elastic contact piece and is separated from the metal .
Can be inserted into the cylindrical housing part,
The protection part is characterized in that it is formed in a closed ring shape having a communication hole capable of receiving the male terminal fitting.

[0005] The female terminal fitting according to the second aspect is the first aspect.
In the female terminal fitting described in the above, a tapered tapered guide surface is formed at an opening edge of the communication hole to guide an assembling operation to an assembled body into which the female terminal fitting is incorporated. It has features. Further, the female terminal fitting of claim 3 is the same as that of claim 1 or 2, wherein the female terminal fitting is provided inside the conductive casing connected to the shielded wire of the shielded electric wire and is formed of an insulating material. And is connected to the core wire of the shielded wire.

[0006]

According to the first aspect of the present invention, since the protection portion is formed in a closed annular shape, the strength is improved. Therefore, deformation at the time of housing in the cylindrical housing portion or the like can be avoided as much as possible.

According to the second aspect of the present invention, when inserting the female terminal fitting into the assembled body, the protective portion abuts against the insertion opening edge of the assembled body in a state of being slightly displaced from the proper position. In addition, since the guide surface is guided to the proper position by the tapered guide surface, the assembling work can be performed smoothly. According to the third aspect of the present invention, in the female terminal fitting of the shield terminal, only the protection portion is formed in a closed annular shape, and the elastic contact portion has a structure exposed to the outside.
In other words, since we only closed the minimum necessary parts,
It is possible to enhance the original function of the protection unit while suppressing the high-frequency characteristics to such a degree that does not cause a problem in practical use.

[0008]

FIG. 1 shows an embodiment of the present invention.
This will be described with reference to FIG. Hereinafter, the female terminal fitting used in the shield terminal connected to the shielded wire will be described as an example. As shown in FIG. 1, the entire female terminal fitting 10 is integrally formed by bending a conductive metal plate. The female terminal fittings 10 are arranged in this order from the rear end side in the drawing to the core wire 41 of the shielded electric wire 40 (FIG. 3).
(See FIG. 4), a connection portion 12 to which a male terminal fitting 61 (see FIG. 4) is connected, and a connection at the time of insertion into a dielectric 20 (corresponding to a cylindrical housing portion of the present invention). The protection unit 13 protects the unit 12.

The connecting portion 12 is formed as a pair of side walls 12B with the left and right sides of the bottom surface of the female terminal fitting 10 facing each other to form a pair of side walls 12B.
Are protruded upward. Since the height of the side walls 12B is only slightly smaller than the height of a cavity 21 of the dielectric 20, which will be described later, when the female terminal fitting 10 is inserted into the cavity 21, the press fitting protrusion 12
C is forcibly inserted into the female terminal fitting 10.
Is stopped. Also, both side walls 12B
A pair of elastic contact pieces 12A, 12A formed in a thin tongue piece shape extend forward from the front end of the elastic contact piece. The pair of elastic contact pieces 12A are formed so as to be curved so as to bend inward each other, and the male terminal fitting 61 is inserted so as to push and spread both of them while resisting the spring force. ing.

The protection section 13 is formed by bending a pair of frame pieces 13A, 13A extending in the left-right direction from the bottom surface inward at right angles in two places, respectively, and abutting both ends thereof to form a substantially rectangular connection. It is formed in a closed ring shape with a hole 13B. The protection portion 13 is provided with an elastic contact piece 12A.
And a flexible space for the elastic contact piece 12A is secured slightly forward of the male terminal fitting 61 in the communication hole 13B.
Is inserted loosely. A tapered guide surface 13C is formed at the opening edge of the communication hole 13B. In addition, from the connection part 12 to the protection part 13, a ridge 14 bulges inward on the bottom surface of the female terminal fitting 10 so as to resist bending in the length direction.

Next, a procedure for assembling the female terminal fitting 10 into a shield terminal will be described. The shield terminal is composed of the above-described female terminal fitting 10, a dielectric 20 for accommodating the same, and a dielectric 20. It comprises an outer conductor 30 to be accommodated, and these will first be briefly described. The dielectric 20 is formed of a synthetic resin into a rectangular tube shape, and the inside is a cavity 21 that can accommodate the female terminal fitting 10. The cavity 21 is opened in the front wall 22 of the dielectric 20 and forms an insertion port 23 into which the male terminal fitting can be inserted. The cavity 21 is also opened rearward, and the bottom surface of the cavity 21 extends rearward to form an invitation portion 24 for the female terminal fitting 10. However, the side wall 25 lower than the side wall of the cavity 21 is
Is provided. On the other hand, as shown in FIG. 3, the outer conductor 30 is integrally formed of a conductive metal plate, and has a square tubular portion 31 on which the dielectric 20 can be mounted and a braided wire 4 of the shielded wire 40.
2 (a shielded wire).

At the time of assembling, for example, first, the shielded electric wire 4 is attached to the wire barrel 11 of the female terminal fitting 10.
The core 41 stripped from 0 is caulked and connected. next,
The dielectric 20 is mounted in the rectangular tube portion 31 of the outer conductor 30. Then, the protection portion 13 is made to approach the rear opening of the cavity 21 from obliquely upward and rearward. Then, when the protection portion 13 enters between the left and right side walls 25, positioning in the left and right direction is performed. Subsequently, the protection unit 13 is positioned in the up-down direction by abutting on the invitation unit 24.
It should be noted that even if the protection portion 13 collides with the rear opening edge of the cavity 21 with a slight deviation from the normal position, the guide portion 13C can automatically guide the user to the normal position. Then, when the female terminal fitting 10 positioned in the left, right, up and down directions is inserted into the cavity 21, the press-fit projection 12 </ b> C contacts the upper surface of the cavity 21. When the female terminal fitting 10 is further advanced into the interior of the cavity 21 while applying pressure, the protection section 1
3 abuts against the front wall 22 to restrict the pushing of the female terminal fitting 10. In this state, the barrel portion 32 of the outer conductor 30
The braided wire 42 stripped from the shielded electric wire 40 is caulked and connected.

As described above, the female terminal fitting 10 and the dielectric 2
FIG. 4 shows a state in which the outer conductor 30 in which the shield wire 40 and the outer conductor 30 are assembled is housed in the connector housing 50. This connector housing 50 is further fitted with a joint connector 60. At this time, the male terminal fitting 61 is inserted into the cavity 21 through the insertion port 23, and further connected to the elastic contact piece 12A through the communication hole 13B.

In the female terminal fitting 10 configured as described above, the ends of the two frame pieces 13A in the protection portion 13 are formed in a closed ring by abutting each other, so that the configuration is extremely simple. In addition, it has excellent strength and is not easily deformed when any external force is applied. Further, the closed annular portion is only the protection portion 13, and the female terminal fitting 10 is provided.
Since the other portion does not have a closed annular structure, there is no practical problem with high-frequency characteristics.

Further, a tapered guide surface 13 C is provided at the opening edge of the protection portion 13, so that when the female terminal fitting 10 is inserted into the dielectric 20, the protection portion 1 is not provided.
Even when 3 abuts on the opening edge of the cavity 21 with a slight deviation from the normal position, the guide surface 13C guides it to the normal position, so that the assembling work can be performed smoothly.

The present invention is not limited to the above-described embodiment. For example, the following ones are also included in the technical scope of the present invention. (1) In the present embodiment, a pair of left and right frame pieces are bent and the ends of both are joined to form the protection portion in a closed annular shape. However, the present invention is not limited to this. For example, a longer frame piece is provided only on one side. It may be bent in a closed annular shape, or a configuration may be such that the bottom surface of the distal end portion of the female terminal fitting is vertically erected from the front to the rear to provide a through hole. (2) In the present embodiment, the female terminal fitting is used as the inner conductor of the high-frequency connector. However, the present invention is not limited to this, and may be used for other purposes.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a female terminal fitting and a dielectric according to the present embodiment.

FIG. 2 is a plan sectional view of a female terminal fitting and a dielectric.

FIG. 3 is a side view showing a female terminal fitting, a dielectric, an outer conductor, and a shielded electric wire.

FIG. 4 is a plan sectional view showing an assembled state of the connector housing.

FIG. 5 is a perspective view showing a conventional shield terminal.

FIG. 6 is a perspective view showing a conventional female terminal fitting.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Female terminal fitting 3A ... Elastic contact piece 4 ... Protective part 10 ... Female terminal fitting 12A ... Elastic contact piece 13 ... Protective part 13B ... Communication hole 13C ... Guide surface 20 ... Dielectric (assembled body) 61 ... Male Side terminal fitting

──────────────────────────────────────────────────続 き Continuation of the front page (72) Inventor Masahiko Aoyama 1-14 Nishisuehirocho, Yokkaichi-shi, Mie Sumitomo Wiring Systems, Ltd. (56) References JP-A-4-218274 (JP, A) JP-A-8 −315888 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) H01R 11/11 H01R 13/11 H01R 13/658

Claims (3)

(57) [Claims] 1. A female terminal fitting formed by bending a conductive metal plate and having an elastic contact piece elastically contactable with a male terminal fitting exposed to the outside , wherein said elastic contact piece is provided. A protective portion for protecting the elastic contact piece is further distant from the front, and from the protective portion, the whole is placed in the cylindrical housing portion.
A female terminal fitting , wherein the protection part is formed in a closed annular shape with a communication hole capable of receiving the male terminal fitting. 2. A tapered guide surface is formed at an opening edge of the communication hole to guide an assembling operation into an assembled body into which a female terminal fitting is incorporated. The female terminal fitting according to claim 1. 3. A shielded electric wire, wherein the shielded electric wire is disposed inside a conductive casing connected to a shielded wire and can be incorporated into a cylindrical housing member formed of an insulating material and connected to a core wire of the shielded wire. The female terminal fitting according to claim 1 or 2, wherein