JPH11111366A - Electrical contact - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electrical contact which has a structurally strong receptacle part for receiving counter tab terminal of a flat plate type and a piece for preventing excessive stresses to prevent excessive deformations caused by the counter tab terminal. SOLUTION: An electrical contact part 1 has a receptacle part 10 for receiving a counter tab terminal 40 of a flat-plate type. The receptacle part 10 is equipped with a base board part 11 and a pair of sidewalls 12a, 12b raised from both sides of the base board part 11. Plural excessive stress preventing pieces 18a, 18b, 18c, 18d, 18e, for regulating movement of the counter tab terminal 40 toward the second elastic tongue piece 17 side when receiving the counter part tab terminal 40 and to prevent an excessive stress of the second tongue piece 17 are provided in each of a pair of the sidewalls 12a, 12b. The plural excessive preventive pieces 18a, 18b, 18c, 18d, 18e are formed by cutting and raising them from each of a pair of the sidewalls 12a, 12b along a direction from the front side to the rear side of the receptacle 10.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric contact having an overstress preventing piece for preventing an excessive deformation of an elastic tongue by a mating tab terminal when the mating tab terminal is received in a receptacle portion. Things.

[0002]

2. Description of the Related Art Conventionally, as an electric contact of this type, for example, the one shown in FIG.
No. 1269).

The electric contact 100 has a receptacle portion 101 for receiving a flat tab terminal 110.
And a wire connection portion (not shown) connected to the wire, and is formed by punching and bending a metal plate. And the receptacle part 101
A substrate portion 102, a pair of side walls 103 raised from both sides of the substrate portion, a pair of top plate portions 104 bent inward from each of the pair of side walls 103, and a front end of the substrate portion 102 And an elastic tongue 106 that is folded back from the left end in FIG. 5C and extends rearward to lock the mating tab terminal 110. In addition, a pair of upright flanges 109 that are located on both sides of the elastic tongue piece 106 are cut and raised from the substrate portion 102. The upright flange 109 holds the elastic tongue 1 in a state where the cut and raised inner surface faces the side edge of the elastic tongue 106.
06, and extends in the front-rear direction. The flat tab terminal 110 is connected to the free end portion 105 of the top plate 104.
And an upper end of the pair of upright flanges 109, and an opening 111 formed in the mating tab terminal 110 is locked by a locking projection 107 formed in the elastic tongue piece 106. As a result, the mating tab terminal 110 is
The elastic tongue 106 is urged upward by the elastic force of
And the free end 105 of the top plate 104.
When the mating tab terminal 110 is inserted into the receptacle portion 101, the mating tab terminal 110 comes into contact with the upper ends of the pair of upright flanges 109, so that the downward movement of the mating tab terminal 110 is restricted by the upstanding flange 109. . For this reason, excessive deformation of the elastic tongue 106 by the mating tab terminal 110 is prevented.

[0005] In FIG. 5, reference numeral 108 denotes a release portion for releasing the locking state of the mating tab terminal 110.

[0005]

However, in the conventional electric contact 100, as shown in FIG. 5A, the elastic tongue piece 106 is prevented from being excessively deformed by the mating tab terminal 110. Since the upright flange 109 is cut and raised, a large notch 109a extending in the front-rear direction is formed in the substrate portion 102 and the pair of side walls 103. In particular, the notch 109 formed in the side wall 103
Since the area of “a” is large, the strength of the side wall 103 is low, and there is a problem that the side wall 103 is easily deformed by the mating tab terminal 110 when the mating tab terminal 110 is inserted into the receptacle portion 101.

Accordingly, an object of the present invention is to provide an overstress prevention piece for preventing the elastic tongue from being excessively deformed by the mating tab terminal, wherein the receptacle portion for receiving the flat mating tab terminal is structurally strong. It concerns electrical contacts.

[0007]

SUMMARY OF THE INVENTION An electrical contact according to the present invention has a receptacle portion for receiving a tabular mating tab terminal, the receptacle portion rising from both sides of the substrate portion and the substrate portion. A pair of side walls, a top plate bent from an upper end of the side wall, a first elastic tongue piece that extends rearward from a front end of the substrate portion and locks the mating tab terminal; An electrical contact comprising a second elastic tongue that presses the mating tab terminal toward the first elastic tongue, which is folded back from a front end and extends rearward, wherein each of the pair of side walls includes: A plurality of overstress prevention pieces for restricting the movement of the mating tab terminal toward the second elastic tongue when receiving the mating tab terminal to prevent overstress of the second elastic tongue; The overstress prevention piece of the It is characterized in that it is formed by cutting and raising alternately from each of the pair of side walls along a direction from the front side to the rear side of the cycle parts.

It is also effective that each of the plurality of overstress pieces extends along a vertical direction orthogonal to a direction from the front side to the rear side of the receptacle portion.

[0009]

Embodiments of the present invention will be described with reference to the drawings. 1A and 1B show an electric contact of the present invention, in which FIG. 1A is a plan view, FIG. 1B is a partial cross-sectional view along line 1B-1B of FIG. 1A, and FIG. 1C is a left side view. However, FIG.
In (B), for convenience of explanation, the overstress prevention piece formed on the opposite side wall is shown by a broken line. FIG. 2 is a perspective view of the electrical contact of FIG. 3A and 3B schematically show a state in which a mating tab terminal has been properly inserted into the electrical contact shown in FIG. 1, wherein FIG. 3A is a partial schematic sectional view, and FIG. 3B is a schematic left side view.

In these figures, electrical contacts 1
Is formed by punching and bending a metal plate, comprising a receptacle portion 10 for receiving a flat tab terminal 40 and an electric wire connection portion 30 connected to an electric wire (not shown). . The wire connection part 30 has a wire barrel 31 crimped to the core wire of the wire and an insulation barrel 32 crimped to the sheath of the wire.

The receptacle portion 10 includes a substrate portion 11 and an upper end of one side wall 12a of a pair of side walls 12a, 12b and a pair of side walls 12a, 12b raised from both sides of the substrate portion 11. And a top plate 13 bent from the top. The free end of the top plate 13 is placed on the upper end of the other side wall 12b of the pair of side walls 12a and 12b, and is extended by the lower end of the regulating piece 19 that extends upward from the other side wall 12b and is folded back. Upward movement is restricted. The receptacle portion 10 extends obliquely upward rearward from the front end (the left end in FIG. 1B) of the substrate portion 11 and locks the mating tab terminal 40 when the mating tab terminal 40 is received. 1 elastic tongue piece 14,
A second elastic tongue that is bent from the front end of the top plate portion 13 and extends obliquely downward toward the rear, and presses the mating tab terminal 40 toward the first elastic tongue 14 when the mating tab terminal 40 is received. 17 are provided. This first elastic tongue piece 14
Is formed by being cut and raised from the substrate portion 11, and is provided at a substantially central portion in the front-rear direction for locking an opening 41 (see FIG. 4C) formed in the mating tab terminal 40.
To form a protruding portion, and a mating tab terminal 40 is formed at the rear end.
In order to release the locked state, the release portion 16 is cut and raised to protrude. Also, the first elastic tongue piece 14 of the substrate 11
The protrusions 14a are formed on both sides of the projection. The second elastic tongue piece 17 includes a first curved portion 17a folded downward from the front end of the top plate portion 13, and a first linear portion 17b extending obliquely downward and rearward from the first curved portion 17a. A first curved portion 17c folded upward from the rear end of the first linear portion 17b, a second linear portion 17d extending obliquely upward from the second curved portion 17c forward, and a second linear portion. 1
And a contact portion 17e that contacts the lower surface of the top plate 13 formed at the tip of 7d. In addition, on the lower surface of the first linear portion 17b of the second elastic tongue 17, when the mating tab terminal 40 is received in the receptacle portion 10, the mating tab terminal 4 is formed.
A pair of mating terminal contact portions 17f that come into contact with the upper surface of the projection 0 are formed so as to protrude.

Each of the pair of side walls 12a and 12b restricts the movement of the mating tab terminal 40 toward the second elastic tongue piece 17 when the receptacle portion 10 receives the mating tab terminal 40, thereby forming the second side. A plurality of overstress prevention pieces 18a, 18b, 18c, 18d, 18 for preventing overstress of the elastic tongue piece 17
e is provided. The plurality of overstress prevention pieces 18
a, 18b, 18c, 18d, and 18e are formed by cutting and raising inward from the pair of side walls 12, 12 alternately along the direction from the front side to the rear side of the receptacle portion 10. That is, the overstress prevention pieces 18b, 18
d is formed on the side wall 12 in one direction in which the top plate 13 extends, and the overstress prevention pieces 18a, 18c and 18e are formed on the opposite side wall 12 so as to protrude. A plurality of overstress prevention pieces 18a, 18b,
When 18c, 18d, 18e are formed in the pair of side walls 12, 12, a plurality of notches 21a, 21b, 21c corresponding to the overstress prevention pieces 18a, 18b, 18c, 18d, 18e are formed in the respective side walls 12a, 12b. , 21d, 21e
Is formed. As described above, in the present invention, the plurality of overstress prevention pieces 18a, 18b, 18c, 18d, 18e are provided.
Are formed by cutting and raising inward from each of the pair of side walls 12a and 12b alternately along the direction from the front side to the rear side of the receptacle portion 10, so that the overstress prevention piece is formed by cutting and raising. For the side wall 1
It is not necessary to form large continuous notches in 2a, 12b, and the strength of the side walls 12a, 12b, and thus the strength of the receptacle portion 10, is improved. Further, each of the plurality of overstress prevention pieces 18a, 18b, 18c, 18d, and 18e extends along a vertical direction orthogonal to a direction from the front to back of the receptacle portion 10 to the rear side.
The lower end shear planes of the respective a, 18b, 18c, 18d, and 18e abut on the upper surface of the mating tab terminal 40. For this reason, the overstress prevention pieces 18a, 18b, 18c,
The strength of the mating tab terminals 40 of 18d and 18e is not only high, but also the overstress prevention pieces 18a, 18b and 18
Since the area of the cutouts 21a, 21b, 21c, 21d, 21e for cutting and raising c, 18d, 18e can be reduced, the strength of the side wall 12 is further improved.

Further, the front end of the pair of side walls 12a and 12b has a receptacle portion 1 cut and raised inward.
A pair of mating tab collision preventing pieces 20 are provided extending along the direction from the front side to the rear side of the zero. These mating tab terminals 40 are used when the mating tab terminal 40 tries to collide with the first curved portion 17a of the second elastic tongue piece 17 without being properly inserted into the receptacle portion 10. Are in contact with each other, thereby preventing the collision.

Next, an operation when the mating tab terminal 40 is properly inserted into the electric contact 1 will be described with reference to FIG.

As shown in FIG. 3, when the mating tab terminal 40 is properly inserted into the receptacle portion 10 of the electric contact 1, the mating tab terminal 40 is formed on both sides of the first elastic tongue piece 14. The first elastic tongue 14 is locked by the locking projection 15 (see FIG. 1) while being sandwiched between the raised portion 14a and the terminal contact portion 17f of the second elastic tongue 17. At this time, the elastic force of the second elastic tongue piece 17 is applied to the first elastic tongue piece 14.
Working towards.

Further, an operation when the mating tab terminal 40 is not properly inserted into the electric contact 1 will be described with reference to FIG. FIG. 3 shows an electrical contact 1 with a mating tab terminal 4
(A) schematically shows a state where the mating tab terminal 40 is not properly inserted into the receptacle portion 1 of the electrical contact 1.
(B) is a partial schematic cross-sectional view showing a state where the mating tab terminal 40 is being inserted into the receptacle portion 10 of the electrical contact 1, and (C) is a partial schematic cross-sectional view showing a state where insertion into the receptacle 10 is started.
1 is a schematic left side view of FIG.

As shown in FIGS. 4A and 4C,
When inserting the mating tab terminal 40 obliquely upward from the insertion opening of the receptacle portion 10 without properly inserting the mating tab terminal 40 into the receptacle portion 10 of the electrical contact 1, first, the upper surface of the tip of the mating tab terminal 40 is Receptacle part 10
Abuts against the lower end shear surface of the overstress prevention piece 18a located at the front part of the front end, thereby restricting the movement of the mating tab terminal 40 toward the second elastic tongue piece 17 side. For this reason, at the beginning of insertion of the mating tab terminal 40, the mating tab terminal 40 allows the second elastic tongue piece 17 to be used.
Is not excessively deformed, and no overstress is generated in the second elastic tongue piece 17.

From the state of FIGS. 4A and 4C, FIG.
When the mating tab terminal 40 is further inserted in the state of (B), the upper surface of the mating tab terminal 40 becomes overstress preventing pieces 18b, 18c,
18d and 18e are sequentially in contact with the respective lower ends, and the movement of the mating tab terminal 40 toward the second tongue piece 17 is restricted. For this reason, the second elastic tongue 17 is not excessively deformed by the mating tab terminal 40 even during the insertion of the mating tab terminal 40, and no overstress is generated in the second elastic tongue 17.

If the mating tab terminal 40 is further inserted from the state of FIG. 4B, the state becomes the same as the normal insertion completed state shown in FIG. 3A, and the mating tab terminal 40 becomes the first elastic tongue piece 14.
Are locked by the locking projections 15 of the first elastic tongue 14 in a state of being sandwiched between the protrusions 14 a formed on both sides of the first elastic tongue 17 and the terminal contact portion 17 f of the second elastic tongue 17.

In order to remove the mating tab terminal 40 from the state shown in FIG. 3A, the locking portion of the mating tab terminal 40 is released by pressing the release portion 16 of the first elastic tongue piece 14 downward. Then, the mating tab terminal 40 may be pulled out of the receptacle portion 10 of the electric contact 1.

[0020]

According to the electric contact according to the first aspect, when receiving the mating tab terminal on each of the pair of side walls, the movement of the mating tab terminal toward the second elastic tongue side is restricted. (2) A plurality of overstress prevention pieces for preventing overstress of the elastic tongue piece are provided, and the plurality of overstress prevention pieces are alternately provided from each of the pair of side walls along a direction from the front side to the rear side of the receptacle portion. Because it is cut and raised,
In order to form the overstress prevention piece by cutting and raising, it is not necessary to form a large continuous notch in the side wall, and the strength of the side wall and thus the strength of the receptacle portion are improved.

According to the second aspect of the present invention, each of the plurality of overstress prevention pieces extends along a vertical direction orthogonal to a direction from the front side to the rear side of the receptacle portion. When the mating tab terminal is inserted into the receptacle portion, the lower end shear surface of each of the overstress prevention pieces comes into contact with the upper surface of the mating tab terminal. Therefore, the strength of the overstress prevention piece with respect to the mating tab terminal is high. or,
Since the area of the notch for cutting and forming the overstress prevention piece can be reduced, the strength of the side wall is further improved.

[Brief description of the drawings]

1A and 1B show an electric contact of the present invention, wherein FIG. 1A is a plan view, FIG. 1B is a partial cross-sectional view taken along line 1B-1B of FIG.
(C) is a left side view. However, in FIG. 1B, for convenience of explanation, the overstress prevention piece formed on the opposite side wall is shown by a broken line.

FIG. 2 is a perspective view of the electric contact of FIG. 1;

3A and 3B schematically show a state in which a mating tab terminal is properly inserted into the electrical contact of FIG. 1; FIG. 3A is a partial schematic sectional view, and FIG. 3B is a schematic left side view.

4A and 4B schematically show a state where a mating tab terminal is not properly inserted into the electric contact of FIG. 1; FIG. 4A is a partial schematic cross-sectional view showing a state where the mating tab terminal starts to be inserted into a receptacle portion of the electric contact; 4B is a partial schematic cross-sectional view showing a state where the mating tab terminal is being inserted into the receptacle portion of the electrical contact, and FIG. 4C is a schematic left side view of FIG.

5A and 5B show a conventional electrical contact, wherein FIG. 5A is a partial perspective view, FIG. 5B is a left side view, and FIG. 5C is a partial sectional view.

[Description of sign]

DESCRIPTION OF SYMBOLS 1 Electrical contact 10 Receptacle part 11 Substrate part 12a, 12b Side wall 13 Top plate part 14 1st elastic tongue piece 17 2nd elastic tongue piece 18a, 18b, 18c, 18d, 18e Overstress prevention piece

Claims (2)

[Claims] A receptacle portion for receiving a mating tab terminal having a flat plate shape, wherein the receptacle portion is bent from a substrate portion, a pair of side walls raised from both sides of the substrate portion, and an upper end of the side wall. A top plate portion, a first elastic tongue that extends rearward from a front end of the board portion, and that locks the mating tab terminal; and a bent back portion extends from the front end of the top plate portion and extends rearward. An electrical contact comprising a second elastic tongue for pressing the mating tab terminal toward the first elastic tongue; wherein the mating tab terminal is received on each of the pair of side walls when receiving the mating tab terminal. A plurality of overstress prevention pieces are provided for restricting the movement of the tab terminal to the second elastic tongue side to prevent overstress of the second elastic tongue piece, and the plurality of overstress prevention pieces are provided on the receptacle portion. From the front to the rear Electrical contacts, characterized in that it is formed by cutting and raising alternately from each of the pair of side walls I. 2. The apparatus according to claim 1, wherein each of the plurality of overstress prevention pieces extends in a vertical direction orthogonal to a direction from a front side to a rear side of the receptacle portion.
Electrical contacts as described.