JPH09251870A - Female type terminal - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a small female-type terminal capable of preventing deformation of the female type terminal when a tab terminal is to be inserted. SOLUTION: A female type terminal 100 provided with a bottom plate 11 extending to the forward and backward direction, side plates 12a and 12b erecting from both side edges of the bottom plate 11, two top part contact pieces 14a and 14b comprising inward bending respective free ends of the side plates 12a and 12b bent so as to face the bottom plate 11, and a lower part contact piece 15 extending backward from the vicinity of a front end part 11c on a side into which a counterpart tab terminal is to be inserted and having a protrusion 16 on the upper face, wherein the tab terminal is inserted and the hole on the tab terminal side and the protrusion 16 are engaged with each other between the top part contact pieces 14a and 14b and the lower part contact piece 15 so that the terminal is provided with arm pieces 20a and 20b comprising erecting from both side edges of the bottom plate 11, respectively, and departing from the side plates 12a and 12b, and the free ends 21a and 21b bent and overlapped on the top part of the top part contact pieces 14a and 14b.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a female terminal in which a mating tab terminal is inserted to make electrical contact with the tab terminal.

[0002]

2. Description of the Related Art Conventionally, as this type of female terminal, for example, a female terminal as disclosed in Japanese Utility Model Laid-Open No. 1-132072 is widely used. FIG. 8 is a schematic view of the above-mentioned conventional female terminal. As shown in FIG. 8, the female terminal 10 includes a bottom plate 1 and both side edges 1a and 1b of the bottom plate 1.
Side plates 2a and 2b standing upright from each other and side plates 2a and 2b
b Two upper contact pieces 4a, 4 each of which is formed by bending the respective free ends 3a, 3b inward so as to face the bottom plate 1.
b and a lower contact piece 5 that extends rearward from the vicinity of the front end portion 1c of the bottom plate 1 on the side where the mating tab terminal 9 is inserted and that has a projection 6 on the upper surface. Further, a rear end portion of the lower contact piece 5 extends rearward and is bent upward to form a pressing piece 5a, and a part of the bottom plate 1 extends rearward to connect a barrel 7 for connecting a conductor wire. Is forming. The upper contact piece 4 of the female terminal 10 thus configured
When the mating tab terminal 9 having the hole 9a at a position corresponding to the protrusion 6 of the lower contact piece 5 is inserted between the a and 4b and the lower contact piece 5, the hole 9a of the tab terminal 9 and the female terminal 10 are inserted. The projection 6 is engaged to connect the female terminal 10 and the tab terminal 9. When removing the tab terminal 9 from the female terminal 10,
By pressing the pressing piece 5a downward, the lower contact piece 5 is bent downward with the vicinity of the front end 1c of the bottom plate 1 as a fulcrum, and the engagement between the projection 6 and the hole 9a is released.

[0003]

However, in the above-mentioned female terminal 10, since the upper contact pieces 4a and 4b have a cantilever structure, the tab terminal 9 is connected to the upper contact pieces 4a and 4b.
When trying to insert between the lower contact piece 5 and the lower contact piece 5, if an unreasonable force is applied to the upper contact pieces 4a and 4b in an attempt to insert the tab terminal 9 from an incorrect insertion direction, the upper contact piece 4a
There is a problem that a and 4b are easily deformed.

Further, since the pressing piece 5a in the female terminal 10 is formed by extending the rear end portion of the lower contact piece 5 rearward, the female terminal as a whole has the lower contact piece 5 and the pressing piece 5a. The total length of 5a is required, and the female terminal 10
There is also a problem that it becomes a constraint in downsizing the whole.
In view of the above circumstances, it is an object of the present invention to provide a small female terminal capable of preventing the female terminal from being deformed when the tab terminal is inserted.

[0005]

A first female terminal of the present invention that achieves the above object is to provide a bottom plate extending in the front-rear direction, side plates standing up from both side edges of the bottom plate, and respective side plates thereof. Two upper contact pieces that are bent inward so that their free ends face the bottom plate, and a lower part that extends rearward from the vicinity of the front end part of the bottom plate where the mating tab terminal is inserted and has a protrusion on the upper surface. A contact piece is provided, and a mating tab terminal having a hole or a recess at a position corresponding to the protrusion of the lower contact piece is inserted between the upper contact piece and the lower contact piece to insert the hole or recess and the protrusion. Female terminals that engage with each other, are erected from both side edges of the bottom plate and separated from the side plates, and are folded over the upper contact piece at the upper position of the upper contact piece whose free end is separated from the upper contact piece. Ah Characterized by comprising a strip.

A second aspect of the present invention which achieves the above object.
The female terminal of is a bottom plate that extends in the front-rear direction, side plates that stand up from both side edges of the bottom plate, and two upper contact parts that are bent inward so that the free ends of the side plates face the bottom plate. A bottom contact piece that extends rearward from the vicinity of the front end of the bottom plate on the side where the mating tab terminal is inserted and that has a protrusion on the top surface, and a bottom portion between the top contact piece and the bottom contact piece. In a female terminal in which a mating tab terminal having a hole or a recess at a position corresponding to the projection of the contact piece is inserted and the hole or the recess and the projection engage with each other, the middle of one side edge of the lower contact piece. Part of the lower contact piece surrounded by an L-shaped cut extending between the portion and the rear end portion of the lower contact piece is formed by cutting and raising upward with the rear end portion of the lower contact piece as a fulcrum. Pressed down Rukoto by, characterized in that a pressing piece for releasing the engagement between the lower contact piece and the tab terminal is bent downward as a fulcrum near the front end portion of the bottom plate of the lower contact piece.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below. FIG. 1 is a schematic view showing a first embodiment of a female terminal of the present invention, and FIG. 2 is a partial cross-sectional view of FIG. 1 seen in the AA ′ direction. As shown in FIGS. 1 and 2, the female terminal 100 includes a bottom plate 11 extending in the front-rear direction, side plates 12a and 12b standing upright from both side edges 11a and 11b of the bottom plate, and side plates 12a and 12b thereof. Bottom plate 1 and two upper contact pieces 14a and 14b formed by bending the inside so that the free ends of the bottom plate 11 and the bottom plate 11 face each other.
1 is provided with a lower contact piece 15 extending rearward from the vicinity of the front end portion 11c on the side where the mating tab terminal is inserted and having a projection 16 on the upper surface. Upper contact pieces 14a, 1
Beads 14c and 14d projecting downward are formed on 4b, respectively, and the upper contact piece 14 of the female terminal 100 is formed.
The mating tab terminals inserted between a and 14b and the lower contact piece 15 electrically contact these beads 14c and 14d and the lower contact piece 15. The mating tab terminal is provided with a hole or a recess at a position corresponding to the protrusion 16 of the lower contact piece 15, and when the hole or the recess is engaged with the protrusion 16, the female terminal 100 and the mating tab terminal are connected. Are connected. In addition, a part of the bottom plate 11 extends rearward, and the conductor barrel 1 for connecting the conductor wire 18a is formed.
Insulation barrels 17c and 17d for fixing 7a and 17b and the covering material 18b of the conductor are formed.

In the female terminal 100, the side plates 12a, 11a, 11b are erected from both side edges 11a, 11b of the bottom plate 11, respectively.
Arm pieces 20a and 20b separated from 12b are provided. Free ends 21a, 21b of arm pieces 20a, 20b
Is the upper contact piece 14 separated from the upper contact pieces 14a and 14b.
The upper contact pieces 14a, 14b are folded over at the upper positions 22a, 22b of a, 14b. Further, a part of the free ends 21a, 21b is formed by pressing a part of the free ends 21a, 21b to project it to the front side.
23b are formed.

Since the female terminal 100 is constructed in this way, when the mating tab terminal is inserted between the upper contact pieces 14a, 14b and the lower contact piece 15, the tab terminal is inserted from the wrong direction. Even if an unreasonable force is applied to the upper contact pieces 14a, 14b in an attempt, the arm pieces 20a, 2
0b free ends 21a, 21b and overhangs 23a, 23
b suppresses the deformation of the upper contact pieces 14a, 14b,
The upper contact pieces 14a and 14b are prevented from being deformed. This function of the arm pieces 20a and 20b is hereinafter referred to as an anti-overstress function.

Further, in the rear end portion 15b of the lower contact piece 15 of the female terminal 100 of this embodiment, the middle portion of one side edge 15c of the lower contact piece 15 and the rear end portion 15b of the lower contact piece 15 are provided. There is provided a pressing piece 15a formed by cutting and raising a part of the lower contact piece surrounded by an L-shaped notch 15d extending therebetween with the rear end portion 15b of the lower contact piece 15 as a fulcrum.

FIG. 3 is a partially enlarged view of the pressing piece 15a in the female terminal 100 shown in FIGS. Note that FIG.
In order to explain how a part of the lower contact piece 15 is cut and raised upward with the rear end portion 15b as a fulcrum, it is shown as a perspective view as seen from the direction of arrow B in FIG. The pressing piece 15a is pressed downward to generate the lower contact piece 1a.
5 is bent downward with the vicinity of the front end portion 11c of the bottom plate 11 as a fulcrum to release the engagement between the lower contact piece 15 and the mating tab terminal.

Next, a method of manufacturing the female terminal 100 will be described. FIG. 4 shows the female terminal 10 of the first embodiment.
It is a punching drawing of the metal thin plate at the time of manufacturing 0. As shown in FIG. 4, a bottom plate portion 4 for forming a female terminal
1, side plate portion 42, upper contact piece portion 44, lower contact piece portion 45, protrusion portion 46, pressing piece portion 45a, arm piece portion 50, arm piece free end portion 51, conductor barrel portion 47.
It is punched out from a thin metal plate as a shape in which a and the insulation barrel portion 47b are integrated.

The arm piece portion 50 is separated from the side plate portion 42 and the upper contact piece portion 44 by a slit 51a formed at the tip of the arm piece free end portion 51 and punched portions 48b and 48c connected to the slit 51a. The lower contact piece portion 45 and the pressing piece portion 45a include a punching portion 48c and a slit 45.
The pressing piece portion 45a is separated from the bottom plate portion 41 by the d and the punched portion 48e, and the pressing piece portion 45a is an L-shaped cut portion 45 formed by the punched portion 48d and the slit 45b.
c is raised upward with the broken line 45f near the punched portion 48f as a fulcrum, and is formed into a shape as shown in FIG.
Further, the upper contact piece portion 44 is formed with a bead portion 48a protruding downward, which is an actual contact surface with the mating tab terminal.

FIG. 5 is a detailed view of a part of the protrusion of FIG. As shown in FIG. 5, when the thin metal plate is punched, the protruding portion 46 has a part of the bottom plate 41 which is inclined upward in the right direction along the direction (arrow A direction) in which the mating tab terminal is inserted. It is formed in a protruding shape. As shown in FIGS. 4 and 5, after the metal thin plate is punched, each part is subjected to a predetermined deformation process so that the female terminal 10 having the shape shown in FIG.
0 is completed. Regarding the part related to the above-mentioned anti-overstress function in the deformation process, FIG. 1, FIG.
This will be described below with reference to FIG.

The side plate portions 42 are the side edges 11 of the bottom plate portion 41.
Side plates 12a, 12b bent inward from a, 11b
Is formed. The free ends of the side plates 12a and 12b are further bent inward to face the bottom plate, and the upper contact piece 14 is bent.
a, 14b are formed. On the other hand, the arm piece portion 50 moves from the both side edges 11a and 11b of the bottom plate portion 41 to the side plates 12a and 1a.
2b, the free ends 21a and 21b of which are separated from the upper contact piece 1
The upper contact pieces 14a, 1 at the upper positions of 4a, 14b
An anti-overstress function of suppressing deformation of the upper contact pieces 14a and 14b by being folded on the 4b is fulfilled.

Here, in order for the free ends 21a and 21b of the arm pieces 20a and 20b to be superposed on the upper contact pieces 14a and 14b, the free ends of the side plates 12a and 12b are bent inward so that they face the bottom plate. After being attached, the upper contact piece 14
By bending a and 14b further inward, the free ends 21a and 21b of the arm pieces 20a and 20b reach the upper positions 22a and 22b of the upper contact pieces 14a and 14b, and the upper contact portions are sufficiently overlapped. Piece 14a,
It is necessary to form 14b. In addition, the above-mentioned free end 21
The overhang portions 23a and 23b of a and 21b play a role of supplementing the anti-overstress function of the arm pieces 20a and 20b by further widening the above-mentioned overlapping portion.

Next, a second embodiment of the female terminal of the present invention will be described. FIG. 6 is an explanatory diagram of the second embodiment of the female terminal of the present invention. FIG. 6A is a plan view and FIG.
6B is a partial cross-sectional view of FIG. 6A viewed from an arrow AA ′, FIG. 6C is a side view of FIG. 6A, and FIG. 6D is FIG. 6B. It is the side view seen from the tab terminal insertion side (arrow B direction).

6A to 6D, the bottom plate 61,
Side plate 62a, upper contact pieces 64a, 64b, lower contact piece 6
5, protrusion 66, pressing piece 65a, arm pieces 70a, 70
b, arm piece free ends 71a, 71b, conductor barrel 77
a, 77b, insulation barrels 77c, 77d
A female terminal 60 is shown with such features. The broken line 69 indicates the insertion position of the mating tab terminal.

Also in the female terminal 60 according to the second embodiment, the arm piece free ends 71a and 71b have upper contact pieces 64.
a, 64b at the upper position, upper contact pieces 64a, 64
The upper end of the arm piece free end 71a,
71b has an anti-overstress function for the upper contact pieces 64a, 64b. In the female terminal 60 of the second embodiment, the pressing piece 65a formed at the rear end of the lower contact piece 65 is cut and raised in the direction of arrow D with the first bent portion 65d as a fulcrum, and then The second bent portion 65c is used as a fulcrum to cut and raise in the direction of arrow C to form a hook-shaped cross section. By thus raising and lowering in two steps, it is possible to increase the height H of the pressing piece 65a while suppressing the total length of the lower contact piece 65.

Further, in the female terminal 60 of the second embodiment, when punching from a thin metal plate, the shape of punching out the lower contact piece portion from the bottom plate portion is the contour line 6 shown in FIG. 6 (a).
By making a T-shape like 1e, the lower contact piece 65
A protruding portion 65d is formed at the rear end portion. This protrusion 65d
By cutting and raising the rear end portion of the lower contact piece 65 in the vicinity in the direction of arrow C in FIG. 6B, the horizontal position of the protruding portion 65d moves toward the left side, and the protruding portion 65d and the edge of the bottom plate 61 are moved. 61f is vertically separated and overlaps. Therefore, even if an unreasonable force is applied to the lower contact piece 65 in an attempt to insert the tab terminal from the wrong insertion direction, the protruding portion 65d will not move to the bottom plate 6.
By contacting the edge 61f of No. 1, the lower contact piece 65
Anti-overstress function against is exerted.

FIG. 7 is an explanatory view of the third embodiment of the female terminal of the present invention. 7A is a plan view, FIG. 7B is a cross-sectional view of FIG. 7A viewed from the direction of arrow AA ′, and FIG.
7C is a cross-sectional view of FIG. 7A viewed from the arrow BB ′ direction, and FIG. 7D is a side view of the pressing piece 85a of FIG. 7A viewed from the arrow C direction. 7 (a) to 7 (d),
Bottom plate 81, side plates 82a, 82b, upper contact pieces 84a, 8
4b, the lower contact piece 85, the protrusion 86, the pressing piece 85a, the arm pieces 90a and 90b, the arm piece free ends 91a and 91b, and the like are shown. The broken line 8
Reference numeral 9 indicates the insertion position of the mating tab terminal.

Also in the female terminal 80 of the third embodiment, the free ends 91a and 91b of the arm pieces have upper contact pieces 84.
a in the upper position of a, 84b, upper contact pieces 84a, 84
is folded on top of b, and the arm piece free end 91a,
91b has an anti-overstress function for the upper contact pieces 84a, 84b. In the female terminal 80 of the third embodiment, the pressing piece 85a formed at the rear end portion of the lower contact piece 85 has the bent portion 85c at the rear end of the lower contact piece 85 as a fulcrum, and the rear portion of the lower contact piece 85 is a fulcrum. After the end portion is bent in the direction of arrow C, the pressing piece 85a has an S-shaped cross section as shown in FIG. 7B, and the second projection is formed on the vertical portion of the pressing piece 85a. 85 g are formed. The second protrusion 85g is located immediately above the protruding portion 81h formed in the punched portion of the rear end portion of the bottom plate 81. Therefore, when the tab terminal is inserted from the incorrect insertion direction, the second projection 85g contacts the projection 81h, whereby the lower contact piece 85 is prevented from being deformed, and the anti-overstress function is achieved.

In each of the above-described embodiments, an example in which a part of the lower contact piece is provided with a pressing piece which is cut and raised upward with the rear end portion of the lower contact piece as a fulcrum has been described. The present invention is not limited to the female type terminal provided with the pressing piece of this type, and may be the one provided with the pressing piece formed by extending the lower contact piece backward as in the above-mentioned conventional example. However, from the viewpoint of miniaturization of the entire female terminal, the type in which the lower contact piece is partially cut and raised to form the pressing piece as in the above embodiments is preferable.

[0024]

As described above, according to the female terminal of the present invention, the arm piece separated from the side plate is provided above the upper contact piece formed by bending the free end of the side plate inward so as to face the bottom plate. Since they are overlapped with each other, the female terminal can be prevented from being deformed even if an abnormal force is applied to the upper contact piece when the tab terminal is inserted.

Further, since the pressing piece provided at the rear end of the lower contact piece is formed by cutting and raising a part of the lower contact piece, the total length of the female terminal is shortened,
A small female terminal can be obtained.

[Brief description of drawings]

FIG. 1 is a schematic view showing a first embodiment of a female terminal of the present invention.

FIG. 2 is a partial cross-sectional view of FIG. 1 viewed in the A-A ′ direction.

FIG. 3 is a partially enlarged view of a pressing piece in the female terminal of FIGS. 1 and 2.

FIG. 4 is a punched view of a thin metal plate when manufacturing the female terminal of the first embodiment.

FIG. 5 is a partial detailed view of a protrusion portion in FIG.

FIG. 6 is an explanatory view of a second embodiment of the female terminal of the present invention.

FIG. 7 is an explanatory diagram of the third embodiment of the female terminal of the present invention.

FIG. 8 is a schematic view of a conventional female terminal.

[Explanation of symbols]

 11 Bottom Plates 11a, 11b Side Edges of Bottom Plate 11c Front Ends of Bottom Plate 12a, 12b Side Plates 14a, 14b Upper Contact Pieces 15 Lower Contact Pieces 15a Pressing Pieces 15b Rear Ends 16 Protrusions 20a, 20b Arm Pieces 21a, 21b Free Ends 22a, 22b Upper position 100 Female terminal

Claims (2)

[Claims] 1. A bottom plate extending in the front-rear direction, side plates rising from both side edges of the bottom plate, and two upper contact pieces formed by bending inward so that free ends of the side plates face the bottom plate. A bottom contact piece that extends rearward from the vicinity of the front end of the bottom plate on the side where the mating tab terminal is inserted and has a protrusion on the upper surface, and between the top contact piece and the bottom contact piece, In a female terminal in which a mating tab terminal having a hole or a recess is inserted at a position corresponding to the protrusion of the lower contact piece and the hole or the recess and the protrusion engage with each other, the female terminal stands up from both side edges of the bottom plate. A female terminal, which is separated from the side plate and has an arm piece folded over the upper contact piece at a position above the upper contact piece whose free end is separated from the upper contact piece. 2. A bottom plate extending in the front-rear direction, side plates standing up from both side edges of the bottom plate, and two upper contact pieces bent inward so that the free ends of the side plates face the bottom plate. A bottom contact piece that extends rearward from the vicinity of the front end of the bottom plate on the side where the mating tab terminal is inserted and has a protrusion on the upper surface, and between the top contact piece and the bottom contact piece, In a female terminal in which a mating tab terminal having a hole or a recess at a position corresponding to the protrusion of the lower contact piece is inserted to engage the hole or the recess with the protrusion, one side edge of the lower contact piece A part of the lower contact piece surrounded by an L-shaped cut extending between the intermediate portion and the rear end of the lower contact piece is cut and raised upward with the rear end of the lower contact piece as a fulcrum. Formed, down It is characterized in that it is provided with a pressing piece that bends the lower contact piece downward by being pressed around the front end portion of the bottom plate as a fulcrum to release the engagement between the lower contact piece and the tab terminal. Female terminal.