JPH09102346A - Female side terminal metal - Google Patents

Abstract

PROBLEM TO BE SOLVED: To surely pass inspection light by providing a notch section at the required section of a warp piece which is the rear end section of the tongue piece of a female side terminal metal solidly folded with a metal piece. SOLUTION: A notch section 35a is formed toward the position lower than the apex of a tongue piece 34 on a warp piece 35 which is the rear end section of the tongue piece 34 of a female side terminal metal. Inspection light surely passes without disturbance from one end of the female side terminal metal toward the other end. The gap of the female side terminal metal where a male side terminal metal is inserted is easily and satisfactorily inspected, and the prestress applied to the tongue piece 34 can be managed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a female terminal fitting, and more particularly to a female terminal fitting for prestressing a tongue piece.

[0002]

2. Description of the Related Art Conventionally, a female terminal fitting of this type is shown in FIG. The tubular portion 1 of the terminal fitting folded back into a box-shaped tubular shape has a strip plate piece extending forward from the front end of the bottom wall before folding back, and the strip plate piece is folded back toward the rear end. The tongue piece 2 is formed by bending so that the cross section has a substantially chevron shape. The rear end of the tongue piece 2 is bent so as to warp again toward the ceiling wall 3 of the tubular portion 1, and the rear end of the warp piece 4 is bent to the ceiling wall 3 while bending the tubular portion 1 little by little. The tongue pieces 2 are brought into contact with each other and prestressed.

[0003]

The above-mentioned conventional female terminal fitting has the following problems. In the inspection process, as shown in FIG.
The gap between the tongue piece 2 and the ceiling wall 3 is managed by allowing the inspection light to pass therethrough by using the light receiving device 6 and the light receiver 6, while the inspection light is blocked in the case where the curling piece 4 is provided. As a result, the gap cannot be controlled by the inspection light. The present invention has been made in view of the above problems,
An object of the present invention is to provide a female-side terminal fitting capable of managing a gap by an optical sensor.

[0004]

In order to achieve the above object, the invention according to claim 1 is a female-side terminal fitting formed by three-dimensionally folding a metal plate piece, in which a male-side terminal fitting is inserted. A possible tubular portion, and a tongue piece folded back in a mountain shape from the front end side of the bottom wall in the tubular portion toward the rear end side in the tubular portion,
In the female-side terminal fitting, which comprises a warping piece bent toward the ceiling wall of the tubular portion at the rear end of the tongue piece and abutting against the ceiling wall, the warping piece is located below the top of the tongue side. From the above, a transparent hole is provided upward.

The invention according to claim 2 is the same as claim 1.
In the female-side terminal fitting described in the above item 1, the light-transmitting hole is formed by forming a notch from the rear end to the front end side with respect to the warp piece at the rear end of the tongue piece.

[0006]

In the invention according to claim 1 configured as described above, the tongue piece has a chevron shape from the front end to the rear end of the bottom wall inside the cylindrical portion into which the male side terminal fitting can be inserted. While being bent, the warped piece at the rear end abuts the ceiling wall of the tubular section to prestress the tongue, while the inspection light is emitted from the light emitter in front of the tubular section toward the tongue. In this case, the inspection light that was radiated above the top of the tongue piece and was not blocked travels toward the rear curving piece, and part of the inspection light is blocked by the curving piece and the rest passes through the light-transmitting hole to the rear. Gap management is performed by being illuminated by the light receiver of.
Here, since the light-transmitting hole of the warp piece is formed from the lower position to the upper side of the top of the tongue side, the inspection light that should not be blocked by the tongue piece can be surely transmitted to the rear or the front. .

Further, in the invention according to claim 2 configured as described above, since the notch is formed from the rear end to the front end side with respect to the warp piece at the rear end of the tongue piece,
The inspection light is transmitted back and forth through the cutout portion.

[0008]

As described above, according to the present invention, since the inspection light can be transmitted even if there is a warp piece, the female side terminal capable of performing the gap management by the optical sensor while prestressing the tongue piece. Metal fittings can be provided.

Further, according to the invention of claim 2, it can be realized with an extremely simple structure in which only the notch is formed in the warp piece.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view showing a female terminal fitting according to an embodiment of the present invention. In the figure, the female terminal fitting 10 is formed by pressing a metal plate piece and cutting it into a predetermined shape and folding it back in three dimensions by continuous bending work. Barrel part 2 folded back to have a U-shaped cross section
0, and a cylindrical portion 30 into which a male side terminal fitting (not shown) can be inserted is provided at the front.

In this embodiment, the barrel portion 2 is provided at the rear end.
Although it is a female side terminal metal fitting including 0, it is sufficient that at least the male side terminal metal fitting is provided with the tubular portion 30, and the barrel portion 20 is not necessarily provided. Further, the female-side terminal fitting 10 does not have to be configured as a single body, and may be a part of another fitting. The tubular portion 30 bends and raises the wing pieces that spread in both width directions at the time of press forming vertically to form the side walls 32 and 32 on both sides of the bottom wall 31, and further bends the upper ends horizontally inward to fold each other. Overlapping ceiling walls 33, 33 are formed, and are formed in a box-like tubular shape having a rectangular cross section. The inner ceiling wall 3
Regarding 3a, a bead portion 33a1 oriented in the axial direction is formed in the middle of the width direction.

In the present embodiment, the tubular portion 30 is formed in a box-shaped tubular shape having a rectangular cross section, but it may be a tubular shape and may have a cylindrical cross section. At the time of cutting by press, a strip plate piece that extends forward is left at the front end of the bottom wall 31, and this strip plate piece is folded back in the tubular portion 30 to form a tongue piece 34. The tongue piece 34 is bent in a mountain shape so as to protrude most upward in the middle of the front-rear direction in the tubular portion 30, and a small protrusion 34a1 is formed upward on the top portion 34a. Further, the rear end of the chevron-shaped tongue piece 34 is bent again upward to form a warp piece 35. The warp piece 35 is formed inside the ceiling wall 33 in the process of bending the tubular portion 30. It is set so as to hit the side. Therefore, when the ceiling walls 33, 33 are completely folded and folded, the end of the warp piece 35 hits the ceiling surface and pushes down the rear end of the tongue piece 34 to give prestress.

In this embodiment, the tongue piece 34 is the bottom wall 3.
1 is formed so as to fold back the strip plate extending to the front side to the rear side, but as long as it is a tongue piece that projects in a mountain shape toward the rear side, Can be changed as appropriate. Further, the mountain shape may be almost the same shape, and may be a gentle convex shape that draws an arc as a whole. FIG. 2 shows only the tongue piece 34 and the warp piece 35. The warp piece 35 is formed so as to have a cutout portion 35a cut out from the rear end side so that the width of the tongue piece 34 is approximately half. Has been done. FIG. 3 shows a state in which the tubular portion 30 is viewed from the front, and the lower end of the cutout portion 35a is located lower than the top portion of the tongue piece 34. Therefore, when the inspection light is radiated from the front side of the tubular portion 30, a part of the inspection light radiated above the top portion 34a not shielded by the tongue piece 34 is shielded by the remaining warp piece 35. Although not transmitted rearward, the inspection light irradiated to the cutout portion 35a side is transmitted rearward through the cutout portion 35a. That is, the cutout portion 35a constitutes a light transmitting hole. As described above, since the lower end of the light transmitting hole is lower than the top portion 34a of the tongue piece 34, the inspection light is transmitted through the light transmitting hole to project the shadow of the top portion 34a on the rear side.

In the present embodiment, one side portion of the warp piece 35 is wholly cut out to form a light transmitting hole, but any hole that allows inspection light to pass therethrough may be used. As shown in the drawing, a notch 35b is formed from the rear end side in the middle of the width direction of the warp piece 35, a through hole is formed in the middle, or punching is performed in a net shape as appropriate. , Is transformable. However, when the notch is formed from the rear end side, it can be structurally very easily configured.

Next, the operation of the present embodiment having the above configuration will be described. After the bending process of the female terminal fitting 10 is completed, the inspection light is emitted from the light emitter (not shown) to the inside of the cylindrical portion 30 as in the conventional case. When the irradiation is performed from the front, a part of the inspection light is shielded by the tongue piece 34, and only the inspection light emitted above the top portion 34a is emitted toward the curving piece 35. Then, in the conventional case, all of the remaining inspection light was blocked by the warping piece 35 and was not emitted rearward. However, in the case of the present embodiment, a part of the inspection light is blocked by the remaining warp piece 35 and does not pass rearward, but the inspection light radiated to the side of the cutout portion 35a is the cutout portion 35a. The light is transmitted to the rear through the and is irradiated to a light receiver (not shown). In the light receiver, the shadow of the top portion 34a of the tongue 34 is detected by the shadow of the inspection light that has passed through the light transmitting hole, and whether the gap is appropriate or not is detected. Even when the inspection light is irradiated from the rear side of the tubular portion 30, the inspection light transmitted to the front side projects the shadow of the top portion 34a.

As described above, in the case where the rear end of the tongue piece 34 bent in a mountain shape inside the tubular portion 30 of the female-side terminal fitting 10 is provided with the warp piece 35 for giving prestress, the same warp piece 35 is provided. The top 34a of the tongue 34
By forming the cutout portion 35a serving as a light-transmitting hole from a position lower than that, it is possible to allow the tubular portion to pass through when the inspection light is irradiated, and the gap management can be performed by displaying the shadow of the top portion 34a. .

[Brief description of the drawings]

FIG. 1 is a perspective view of a female terminal fitting according to an embodiment of the present invention.

FIG. 2 is a perspective view of an essential part of the female-side terminal fitting.

FIG. 3 is a front view of the female-side terminal fitting.

FIG. 4 is a perspective view of a main part of a female terminal fitting according to a modification.

FIG. 5 is a sectional view of an essential part of a conventional female terminal fitting.

FIG. 6 is a schematic diagram for performing gap management.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 ... Female-side terminal metal fitting 30 ... Cylindrical part 31 ... Bottom wall 33 ... Ceiling wall 34 ... Tongue piece 34a ... Top part 35 ... Curling piece 35a ... Notch part 35b ... Notch part

Claims (2)

[Claims] 1. A female terminal fitting formed by three-dimensionally folding a metal plate piece, wherein a cylindrical portion into which the male terminal fitting can be inserted, and a bottom wall front end side of the cylindrical portion inside the cylindrical portion. A female terminal fitting including a tongue piece that is bent back toward the rear end side in a chevron shape, and a warping piece that is bent toward the ceiling wall of the tubular portion at the rear end of the tongue piece and abuts against the ceiling wall. The female-side terminal fitting is characterized in that the warping piece has a light-transmitting hole from a position below the top of the tongue side toward the top. 2. The female-side terminal fitting according to claim 1, wherein the translucent hole is formed by forming a cutout from the rear end toward the front end side with respect to the warp piece at the rear end of the tongue piece. A female-side terminal fitting characterized by being configured.