JP5762459B2 - Terminal fitting - Google Patents

Description

  The present invention relates to a female terminal fitting into which a male terminal is inserted, for example, to a female terminal fitting of an automobile connector used for connecting a wire harness or the like.

  Automotive connectors used for connecting wire harnesses and the like are required to have high reliability, and a structure capable of maintaining a large contact force as compared with connection terminals (general terminals) of personal computers and home appliances is required. Therefore, the connector for automobiles is designed to maintain a contact force of a desired size. For example, the contact force between a male terminal and a female terminal is about 10 times as large as that of a general terminal. Designed to be

  Here, the structure of the connection terminal of the conventional connector for automobiles will be described with reference to FIG. FIG. 13 is a schematic diagram for explaining connection terminals of a conventional automobile connector, in which FIG. 13A shows a male terminal and a female terminal (terminal fittings) constituting the connection terminal of the automobile connector. ) And (b) is a schematic view of the elastic contact piece of the terminal fitting as viewed obliquely from above.

  The terminal fitting 200 shown in the figure has a hollow rectangular tube-shaped box portion 210 formed on the front end side, and a wire connecting portion 220 for connecting the end portion of the electric wire on the rear end side. The box portion 210 is composed of a bottom wall 211, an upper wall 213, and left and right side walls 212, and an opening 210a into which the male terminal 300 is inserted is formed at the front end portion thereof. Further, on the upper surface side of the bottom wall 211 of the box part 210, an elastic contact piece (elastic contact spring) 214 that clamps the male terminal 300 with the upper wall 213 when the male terminal 300 is inserted into the opening 210a. Is provided.

  The elastic contact piece 214 has a strip-like spring piece (a strip-like spring piece having substantially the same width) extending at the front end of the bottom wall 211 folded back upward at the base end portion, and its distal end rearward. The spring piece that is bent toward the side and extends rearward is bent in a U-shape so that the middle portion in the length direction bulges toward the upper wall 213, and the free end (tip) is bent to the bottom wall 211. It is the structure which made the upper surface of slidably contact.

When the male terminal 300 is inserted into the terminal fitting 200 in the direction of the arrow (X direction) in the figure, the male terminal 300 comes into contact with the top of the elastic contact piece 214 bent in a U-shape, thereby causing elasticity. The contact piece 214 is elastically displaced downward. Then, the male terminal 300 inserted into the terminal fitting 200 is urged toward the upper wall 213 by the elastic force of the elastic contact piece 214 that is elastically displaced, and is sandwiched between the elastic contact piece 214 and the upper wall 213 (this). Thus, the electrical connection between the male terminal 300 and the terminal fitting 300 is achieved).
In addition, the terminal metal fitting provided with the elastic contact piece 214 of the same structure as the terminal metal fitting 200 shown in FIG. 13 is described in FIG.

FIG. 8 of Japanese Patent No. 5065976

However, in the above-described conventional terminal fitting 200, when the male terminal 300 is inserted, the top of the elastic contact piece 214 is permanently deformed due to the influence of the stress generated by the load applied to the top of the U-shape. There is a technical problem that there are things. As a result, in the automobile connector employing the terminal fitting 200 described above, for example, the elastic contact piece 214 may sag during use, and a desired contact force may not be maintained.
That is, the above-described conventional terminal fitting 200 has a configuration in which the elastic contact piece 214 is formed by bending a strip-shaped spring piece of the same width into a U-shape (see FIG. 13B). In this configuration, when the male terminal 300 is inserted, it cannot sufficiently cope with the stress generated by the load applied to the top of the U-shape, and the top of the elastic contact piece 214 may be permanently deformed. ing.

  In recent years, automobile connectors tend to be miniaturized, and accordingly, the size of the terminal fittings of the connector is also reduced. When the above-described conventional terminal fitting 200 is downsized, the size of the elastic contact piece 214 is also reduced, so that its strength is reduced and the elastic contact piece 214 is more likely to be permanently deformed. . That is, the prior art terminal fitting 200 has a structure that cannot sufficiently meet the demand for miniaturization.

  This invention is made | formed in view of the said technical subject, The objective is to provide the terminal metal fitting for connectors which can maintain desired contact force between the other party terminals.

The present invention made to solve the above technical problem includes a hollow cylindrical box portion having a bottom wall, an upper wall, and both side walls into which a mating male terminal is inserted, and the inside of the box portion. A terminal fitting provided with an elastic contact piece that comes into contact with the male terminal when the male terminal is inserted, wherein the elastic contact piece is U-shaped from the front end to the rear end side of the bottom wall. The middle part in the longitudinal direction is formed in a shape that is bent in a convex shape toward the upper wall, and its free end slides on the upper surface of the bottom wall. When the male terminal is inserted, the male terminal is urged toward the upper wall side so that the male terminal is sandwiched between the upper wall and the male terminal. In the elastic contact piece, the dimension in the width direction of the U-shaped top portion and the first region in the vicinity of the top portion is a width other than the first region of the elastic contact piece. Is formed larger than the dimension of the direction, the upper surface of the first region region of the resilient contact piece is formed thick portion protruding in the thickness direction of the elastic contact piece, the first region and the thickness Each of the meat portions is formed so as to straddle a first slope extending from the convex top to the front end side and a second slope extending from the top to the rear end side .

Thus, in the present invention, the widthwise dimension of the top portion of the U-shaped elastic contact piece and the region in the vicinity of the top portion (first region) is the same as the widthwise dimension of the region other than the first region of the elastic contact piece. The size is larger than that. In addition, the top part of the U-shaped elastic contact piece and the area near the top part are areas where the maximum stress is generated when the male terminal is inserted. That is, the terminal metal fitting of the present invention increases the strength by increasing the dimension in the width direction with respect to the region where the maximum stress is generated in the elastic contact piece. Thereby, according to this invention, compared with the prior art mentioned above (refer FIG. 13), it is prevented that an elastic contact piece sags permanently. As a result, according to the present invention, a terminal fitting that can maintain a desired contact force is provided, and a connector that maintains a desired contact force by using the terminal fitting can be obtained.
In addition, the terminal fitting of the present invention has a structure in which the strength of the elastic contact piece is higher than that of the connection terminal of the prior art described above (see FIG. 13). Since deformation is prevented, it is possible to meet the demand for downsizing.

With the above configuration, when the male terminal is inserted, the strength of the first region where the maximum stress is generated in the elastic contact piece can be further increased. It can be effectively prevented.

In addition, the first region of the elastic contact piece is formed with a second region whose dimension in the width direction is larger than the dimension in the width direction of the box part, and the elastic contact pieces are respectively formed on both side walls of the box part. It is desirable that a hole into which the side portion of the piece is movably inserted is formed.
With this configuration, even if a second region larger than the dimension in the width direction of the box portion is formed in the first region of the elastic contact piece, interference between the elastic contact piece and the side wall is prevented. The dimension in the direction can be set without being limited to the dimension in the width direction of the box portion, and the strength of the elastic contact piece can be increased.

In addition, as described above, “ the first region and the thick portion both straddle a first slope extending from the convex top to the front end side and a second slope extending from the top to the rear end side. by the following reasons the formation has been that has "configuration was adopted as.
Specifically, when the male terminal is inserted into the terminal fitting of the present invention, the male terminal comes into contact with the top of the U-shaped elastic contact piece. The top of the elastic contact piece becomes a load point, and elastically displaces downward in response to a downward load (in the direction from the top wall to the bottom wall). At this time, a stress is generated on both sides of the elastic contact piece in the longitudinal direction around the load point (top). Therefore, in the present invention, the first region having a large length in the width direction and the thick portion protruding in the thickness direction so as to straddle both sides in the longitudinal direction centering on the load point (top) of the elastic contact piece. It was formed so that it could effectively cope with this stress.

  ADVANTAGE OF THE INVENTION According to this invention, the terminal metal fitting for connectors which can maintain desired contact force between the other party terminals can be provided.

BRIEF DESCRIPTION OF THE DRAWINGS It is the perspective view of the terminal metal fitting of embodiment of this invention, (a) is the perspective view which showed the external appearance of the terminal metal fitting of this embodiment, (b) cut | disconnected the terminal metal fitting of this embodiment, and the inside It is the shown perspective view. It is a top view of the terminal metal fitting of the embodiment of the present invention. It is a side view of the terminal metal fitting of the embodiment of the present invention. It is a front view of the terminal metal fitting of the embodiment of the present invention. It is a schematic diagram for demonstrating the structure of the terminal metal fitting of embodiment of this invention, and is the schematic diagram which showed the state which removed the upper wall of the box part. It is the schematic diagram which showed the cross section of the terminal metal fitting of embodiment of this invention. It is a schematic diagram for demonstrating the elastic contact piece of the terminal metal fitting of embodiment of this invention, (a) is the schematic diagram which looked at the elastic contact piece from diagonally upward, (b) is the plane of an elastic contact piece It is the schematic diagram shown, (c) is the schematic diagram which looked at the elastic contact piece from the side. It is the schematic diagram which showed the terminal prototype plate before the press work of the terminal metal fitting of embodiment of this invention. It is a schematic diagram for demonstrating operation | movement of the terminal metal fitting of embodiment of this invention, (a) is a schematic diagram which showed the terminal metal fitting before a male terminal is inserted, (b) is inserting a male terminal. It is the schematic diagram which showed the terminal metal fitting of the state made. It is a schematic diagram for demonstrating the load direction concerning the elastic contact piece of the terminal metal fitting of embodiment of this invention. It is the schematic diagram which showed the 1st modification of embodiment of this invention. It is the schematic diagram which showed the 2nd modification of embodiment of this invention. It is a schematic diagram for demonstrating the connection terminal of the connector for motor vehicles of a prior art, (a) is the schematic diagram which showed the male terminal and female terminal which comprise the connection terminal of a connector for motor vehicles, (b) is female It is the schematic diagram which looked at the elastic contact piece of the terminal from diagonally upward.

Hereinafter, the terminal metal fitting of the embodiment of the present invention is explained using a drawing.
First, the structure of the terminal metal fitting of this embodiment is demonstrated, referring FIGS. 1-7 and FIG.

  As shown in the drawing, the terminal fitting W of the present embodiment is formed of a conductive member such as metal, and a hollow rectangular tube-shaped box portion 10 into which a male terminal T (see FIG. 9) is inserted on the front end side thereof. Is formed, and a wire connecting portion 50 for connecting an end portion of the wire is formed on the rear end side. An elastic contact piece (elastic contact spring) 14 that contacts the inserted male terminal T is provided inside the box portion 10. For example, the terminal fitting W is inserted into a connector housing (not shown) of an automobile connection connector and used as an automobile connector. In addition, since the electric wire connection part 50 is the structure similar to the electric wire connection part 220 (refer FIG. 13) of the prior art mentioned above, and is implement | achieved by a well-known technique, the description is abbreviate | omitted below and it is a box. The structure of the part 10 and the elastic contact piece 14 will be described in detail.

First, the box unit 10 will be described in detail.
Specifically, as shown in FIGS. 1 to 4, the box portion 10 includes a bottom wall 11, an upper wall 13 opposite to the bottom wall 11, and left and right sides standing from both sides of the bottom wall 11. Both side walls 12 are provided, and an opening 10a into which the male terminal T is inserted is formed at the front end portion thereof. An elastic contact piece (elastic contact spring) 14 is provided on the upper surface side of the bottom wall 11 inside the box portion 10 to hold the male terminal T with the upper wall 13 when the male terminal T is inserted. It has been.

  As shown in FIGS. 4 and 6, the upper wall 13 includes an upper wall 13a that is bent inward at a substantially right angle from the upper end of one side wall 12, and an upper wall 13a that is bent at a substantially right angle from the upper end of the other side wall 12. The upper wall 13b is bent, and the upper wall 13a is superposed on the upper wall 13b. The upper wall 13b is provided with a terminal contact portion 13b1 that comes into contact with the inserted male terminal T. Further, on the lower side (bottom wall 11 side) of the front end of the box portion 10, a plate piece 17 a bent from the front end of one side wall 12 to the other side wall 12, and one side wall 12 from the front end of the other side wall 12. A plate piece 17b bent to the side is formed (see FIGS. 1 and 4).

  Moreover, the hole 12a which penetrates the side wall 12 is formed in each of the left and right side walls 12 of the box portion 10 (see FIGS. 3 and 6). A “wide portion 15 a of the elastic contact piece 14” to be described later is movably inserted into the hole 12 a, so that the wide portion 15 a of the elastic contact piece 14 does not interfere with the side wall 12. In the illustrated example, the hole 12a is formed in a rounded rectangular shape, but this shape is merely an example.

Next, the configuration of the elastic contact piece 14 will be described.
As shown in FIGS. 1 and 6, the elastic contact piece 14 is bent and extended in a U shape from the front end to the rear end of the bottom wall 11. It is formed in a rounded shape bent convexly toward the upper wall 13. The free end of the elastic contact piece 14 is slidably supported on the upper surface of the bottom wall 11.
The elastic contact piece 14 is formed by, for example, folding a strip-like spring piece extending from the front end of the bottom wall 11 upward at its base end and bending its free end toward the rear side. The spring piece bent backward is bent into a square shape so that the middle portion in the length direction bulges toward the upper wall 13.

  Moreover, as shown in FIGS. 5-7, the elastic contact piece 14 is the width direction of the center area | region 15 (shaded part shown to FIG.7 (b), (c)) of the U-shaped top part and the top part vicinity. The dimension is formed to be larger than the dimension in the width direction other than the central region (first region) 15 of the elastic contact piece 14. Further, the central region 15 is formed so as to straddle the first slope 14a extending from the convex top to the front end side and the second slope 14b extending from the top to the rear end side (FIGS. 6 and 7). (See (c)).

As described above, the configuration in which the central region 15 having a large length in the width direction is provided on the elastic contact piece 14 is as follows.
Specifically, when the male terminal T is inserted into the terminal fitting W, the male terminal T comes into contact with the top of the U-shaped elastic contact piece 14, and this top serves as a load point. A load in a direction from the wall 13 toward the bottom wall 11 is applied, and the elastic contact piece 14 is elastically displaced downward. At this time, the elastic contact piece 14 is stressed on both sides in the longitudinal direction with the load point (top) as the center. That is, when the male terminal T is inserted into the terminal fitting W, a maximum stress is generated in the top portion and a region near the top portion in the elastic contact piece 14.
Therefore, in the present embodiment, the central region 15 having a large length in the width direction is formed so as to straddle both sides in the longitudinal direction with the load point (top) of the elastic contact piece 14 as the center, and the strength of the central region 15 is increased. , So that this stress can be effectively dealt with. That is, by providing the elastic contact piece 14 with the central region 15 having a large length in the width direction and increasing the strength of the top portion and the region in the vicinity of the top portion, the elastic contact piece 14 may be permanently deformed. I am trying not to.

The central region 15 is formed with a wide portion 15a (second region) whose dimension in the width direction is larger than the dimension in the width direction of the box portion 10 (the dimension in the width direction of the bottom wall portion 11). In addition, the wide portion 15a is movably inserted into the holes 12a formed in the left and right side walls 12 of the box portion 10 (the wide portion 15a is arranged in the vertical direction with respect to the holes 12a of the side wall 12). To be freely movable). With this configuration, when the elastic contact piece 14 comes into contact with the inserted male terminal T and is elastically displaced inside the box portion 10 to move in the vertical direction, it does not interfere with the side wall 12 of the box portion 10. .
Therefore, according to the present embodiment, the dimension in the width direction of the elastic contact piece 14 can be set without being limited to the dimension in the width direction of the box portion 10. That is, according to the present embodiment, the strength of the elastic contact piece 14 can be increased without being limited by the dimension in the width direction of the box portion 10.

  As shown in FIGS. 5 to 7, the central region 15 has a thick portion 16 projecting in the thickness direction of the elastic contact piece 14 (thick wall projecting toward the upper wall 13 on the upper surface side of the elastic contact piece 14. Part 16) is formed. Like the central region 15, the thick wall portion 16 extends across the first slope 14 a extending from the convex top of the elastic contact piece 14 to the front end side and the second slope 14 b extending from the top to the rear end side. Is formed. In the illustrated example, the thick portion 16 is formed in an elliptical shape in plan view, but this shape is only an example. For example, the thick portion 15 may be formed in a rectangular shape in plan view.

  Thus, by providing the thick part 16 in the center area | region 15, the intensity | strength of the area | region of the top part of the elastic contact piece 14 and the top part vicinity can be raised, As a result, the elastic contact piece 14 will sag permanently. Can be effectively prevented.

  Further, as shown in FIG. 6, the elastic contact piece 14 of the present embodiment is formed with an arc portion 14c that is curved in an arc convex shape with respect to the upper surface of the bottom wall 11 at the free end, and this arc portion 14c. Slidably contacts the bottom wall 11. Thereby, the elastic contact piece 14 can move smoothly on the upper surface of the bottom wall 11.

Next, an example is given and demonstrated about the manufacturing method of the terminal metal fitting W of this embodiment.
Specifically, the terminal fitting W can be formed by pressing one terminal prototype plate A shown in FIG. Hereinafter, the terminal prototype plate A will be described using names after press working for convenience of description. FIG. 8 is a schematic diagram showing a terminal prototype plate before press working of the terminal fitting of the present embodiment.

  Specifically, the terminal prototype plate A includes a bottom wall 11, a pair of side walls 12 extending on both sides of the bottom wall 11, and a pair of upper walls extended on the side end portions of the pair of side walls 12. 13a, 13b, a pair of plate pieces 17a, 17b extending at the front ends of the pair of side walls 12, and a strip-like spring piece (elastic contact piece) extending from one end side (front end side) of the bottom wall 11 14). Each of the pair of side walls 12 has a hole 12a. Further, a terminal contact portion 13b1 protruding in a rectangular convex shape is formed on the upper wall 13b. A terminal fitting W having the configuration shown in FIG. 1 is formed by bending a predetermined bent portion of the terminal prototype plate A by pressing.

Next, operation | movement of the terminal metal fitting W of this embodiment is demonstrated using FIG.
FIG. 9 is a schematic diagram for explaining the operation of the terminal metal fitting of the present embodiment. FIG. 9A is a schematic diagram showing the terminal metal fitting before the male terminal is inserted, and FIG. It is the schematic diagram which showed the terminal metal fitting in the state in which the male terminal was inserted. FIG. 10 is a schematic diagram for explaining the load direction applied to the elastic contact piece of the terminal fitting of the present embodiment.

  Specifically, in the terminal fitting W, when the male terminal T is inserted into the opening 10a, the male terminal T contacts the top of the U-shaped elastic contact piece 14, and the U-shape of the elastic contact piece 14 The top is pressed and elastically displaced downward. That is, as shown in FIG. 10, a load F is applied to the top of the elastic contact piece 14 in the downward direction, and the elastic contact piece 14 is elastically displaced. Along with this elastic displacement, the arc portion 14 c at the free end moves in the X direction shown in the figure while sliding on the upper surface of the bottom wall 11. At this time, the elastic contact piece 14 urges the inserted male terminal T toward the terminal contact portion 13b1 of the upper wall 13b by a reaction force against the load applied to the top portion (by an elastic force). Thereby, the male terminal T is clamped between the elastic contact piece 14 and the terminal contact portion 13b1 of the upper wall 13b (FIG. 9B).

  And in this embodiment, the width direction dimension of the convex top part of the elastic contact piece 14 and the area | region (central area | region 15) near the top part is larger than the width direction dimension of areas other than the central area 15 of the elastic contact piece 14. Is also formed large. Further, a thick portion 16 that protrudes in the thickness direction of the elastic contact piece 14 is formed in the central region 15. With this configuration, when the male terminal T is inserted, the strength of the region where the maximum stress is generated in the elastic contact piece 14 (the convex top portion and the region near the top portion) is increased. As a result, according to the present embodiment, the top of the elastic contact piece 14 is effectively prevented from being permanently deformed. That is, since the terminal fitting W of the present embodiment has a structure in which the elastic contact piece 14 is prevented from being sag, the terminal fitting W capable of maintaining a desired contact force can be provided.

  In the present embodiment, the central region 15 of the elastic contact piece 14 is provided with a wide portion 15 a that is larger than the size in the width direction of the box portion 10 (the size in the width direction of the bottom wall portion 11). Also, holes 12a are provided in the left and right side walls 12 of the box part 10, and the wide part 15a is movably inserted into the holes 12a of the left and right side walls 12, so that the wide part 15a and the box part 10 interfere with each other. It is configured not to.

  With this configuration, the dimension in the width direction of the elastic contact piece 14 can be designed without being limited to the dimension in the width direction of the box portion 10. That is, by providing the holes 12a in the left and right side walls 12, the size in the width direction of the elastic contact piece 14 can be made larger than the width direction of the box portion 10, and the strength of the elastic contact piece can be increased.

  As described above, according to the present embodiment, the terminal fitting W is provided in which the strength of the elastic contact piece 14 is increased as compared with the above-described prior art, and as a result, for a connector that can maintain a desired contact force. Terminal fittings W are provided.

  In addition, this invention is not limited to embodiment mentioned above, A various change is possible within the range of the summary.

For example, in the terminal fitting W of the above-described embodiment, the contact portion between the free end of the elastic contact piece 14 and the bottom wall 11 side of the box portion 10 may be modified as shown in FIG. Here, FIG. 11 is a schematic diagram showing a first modification of the embodiment of the present invention.
Specifically, as shown in FIG. 11, a cut and raised piece 18 cut and raised obliquely upward (toward the upper wall 13) from the bottom wall portion 11 is formed on the bottom wall portion 11 of the box portion 10. The free end of the elastic contact piece 14 may be slidably supported on the free end of the raising piece 18. In this case, an arc-convex curved portion 18a is formed at the free end (tip portion) of the cut and raised piece 18, and the curved portion 18a and the free end of the elastic contact piece 14 are brought into contact with each other. Even in this configuration, the same effect as the above-described embodiment can be obtained.
Further, according to this configuration, since the stress is generated also at the root of the cut and raised piece 18 with the deformation of the elastic contact piece 14, the strength received by the male terminal T is reduced, but in the vicinity of the central region 15. Since the generated stress decreases, the stress value as a whole becomes low and stable performance can be obtained.

Further, for example, in the terminal fitting W of the above-described embodiment, the contact portion between the free end of the elastic contact piece 14 and the bottom wall 11 side of the box portion 10 may be modified as shown in FIG. Here, FIG. 12 is a schematic diagram showing a second modification of the embodiment of the present invention.
Specifically, as shown in FIG. 12, an arc portion 19 formed by curving the free end of the elastic contact piece 14 in a C shape in a cross-sectional view is provided, and this arc portion 19 is the bottom wall of the box portion 10. 11 may be configured to be slidably supported. Even in this configuration, the same effect as the above-described embodiment can be obtained.
Further, according to this configuration, since the stress is generated also in the arc portion 19 with the deformation of the elastic contact piece 14, the stress generated in the vicinity of the central region 15 is reduced as in the first modified example, and the whole As a result, a low stress value is obtained, and stable performance can be obtained.

  In the present embodiment, the elastic contact piece 14 has a configuration in which one end thereof extends from the bottom wall 11, but is not particularly limited thereto. The elastic contact piece 14 only needs to have a structure in which one end thereof is fixed to the front end of the bottom wall 11. For example, one end of the elastic contact piece 14 and the front end of the bottom wall 11 are fixed by welding. May be.

W ... terminal fitting T ... male terminal A ... terminal prototype plate 10 ... box part 10a ... opening 11 ... bottom wall 12 ... side wall 12a ... holes 13, 13a, 13b ... upper wall 13b1 ... terminal contact part 14 ... elastic contact piece 14a ... First slope (elastic contact piece)
14b ... 1st slope (elastic contact piece)
14c ... arc portion 15 ... central region (elastic contact piece)
15a ... Wide part (elastic contact piece)
16 ... Thick part (elastic contact piece)
17a, 17b ... Plate piece 50 ... Electric wire connection part

Claims (2)

A hollow cylindrical box part having a bottom wall, an upper wall, and both side walls into which a mating male terminal is inserted, and when the male terminal is inserted into the box part, It is a terminal fitting provided with an elastic contact piece to contact,
The elastic contact piece is bent and extended in a U shape from the front end to the rear end side of the bottom wall, and a substantially middle portion in the length direction is bent convexly toward the upper wall. The free end is slidably supported on the upper surface of the bottom wall, and when the male terminal is inserted, the male terminal is urged toward the upper wall to insert the upper end. The male terminal is sandwiched between the wall and
Further, the elastic contact piece is formed such that the dimension in the width direction of the U-shaped top part and the first region near the top part is larger than the dimension in the width direction other than the first area of the elastic contact piece. And
A thick part protruding in the thickness direction of the elastic contact piece is formed on the upper surface of the first region area of the elastic contact piece,
Each of the first region and the thick portion is formed so as to straddle a first slope extending from the convex top to the front end side and a second slope extending from the top to the rear end side. Characteristic terminal fitting. In the first region of the elastic contact piece, a second region is formed in which the dimension in the width direction is larger than the dimension in the width direction of the box part,
Wherein the side walls of the box portion, respectively, according to claim 1 Symbol mounting of the terminal fitting side of the resilient contact piece, characterized in that it is formed a hole which is inserted movably.

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