JP2690225B2 - Electrical contact - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric contact in which adjacent punched pieces are bent through punching slits.

[0002]

2. Description of the Related Art In recent years, contacts for electric parts such as ICs have become finer and finer, and it has been required to use a thin plate material and perform precise punching and bending.

For example, when the contact portion is bent into a U-shape so that the pair of elastic contact pieces are arranged to face each other, a slit is punched in the bent portion at the time of punching to facilitate the bending, and the shape of the electric contactor and We are trying to stabilize the dimensions.

[0004]

However, when punching the bending slit, the punching width of the punching slit is often wider than the sheet thickness under the present circumstances where the sheet thickness is extremely thin. For this reason, in each step such as cleaning, heat treatment after plating, plating, assembly, etc., the slits punched for bending are entangled with each other part of the electric contact, for example, a long extending male terminal part. Therefore, there arises a problem that cleaning defects, heat treatment defects, plating defects, assembly defects, deformation, etc. are caused, which deteriorates the production yield of the electrical contacts.

Further, when the electric contacts are planted in the connector board or the like in the assembly process, the electric contacts randomly placed in the parts feeder are entangled with each other, which hinders automatic implantation. Since it has to be manually incorporated into the connector board or the like for each pin, there is a problem that the production cost becomes high.

As a means for solving this problem, there has been conventionally adopted a means for preventing this intervention by drawing a rib extending along the length in the central portion of the male terminal of the electric contactor so as to make the plate thickness not less than the slit width. However, this method has a problem that the spring property is impaired, it cannot be used in a part requiring elasticity, and even if a rib is formed, the plate thickness and the equal thickness part partially remain, so The residual part intervenes in the bending slit and becomes entangled, which is not a drastic solution.

[0007]

SUMMARY OF THE INVENTION The present invention aims to solve the above problems, and as a means for solving the above problems, when the adjacent punched-out pieces are bent through the slits to form electric contacts, the above-mentioned folding is performed. The edge of the bending slit is crushed to form a crushed edge that narrows the width of the slit, and the width of the slit between the crushed edges is further narrowed by the bending, and the electric The contactor has a structure narrower than the plate thickness of the contactor.

[0008]

According to the present invention, the width of the bending slit can be easily made narrower than the plate thickness of the electric contact by crushing and bending the edge of the bending slit of the electric contact as described above. It is possible to effectively solve the problem that each part of another electric contact intervenes in the bending slit of the electric contact in each process such as cleaning, heat treatment, plating, assembly, etc. Entanglement of children can be effectively prevented, various problems such as conventional plating defects and assembly defects in each of the above steps are solved, and further deformation due to entanglement is prevented and a highly reliable electric contact is provided. In addition, the manufacturing yield is dramatically improved.

Further, since the entanglement between the electric contacts is eliminated, an automatic machine can be appropriately used for implanting in a connector board or the like, and the production cost can be reduced.

[0010]

Embodiments of the present invention will be described below with reference to the drawings.

1 to 5, reference numeral 1 denotes an electric contactor main body. The electric contactor 1 has a pair of side plates 2 facing each other, and the both side plates 2 are connected by a connecting plate 4 through a slit 3 formed in a bent portion to have a U-shape as a whole. Further, a male terminal 5 is extended downward from the lower end of the connecting plate 4, elastic contact pieces 6 are continuously provided at the lower ends of the both side plates 2, and both elastic contact pieces 6 are bent between the both side plates 2. , The free ends of both elastic contact pieces 6 are opposed to each other between the side plates 2 to form a contact portion 7,
The contact portion 7 is tilted forward in the opposite direction to sandwich a terminal of an electric component such as an IC.

FIGS. 6 and 7 show a developed view of the electric contactor 1, that is, a punching form before bending. In this punching mode, the connecting plate 4 for connecting the male terminals 5 in series is punched so as to be arranged in the central portion, and the side plate 2 for connecting the elastic contact pieces 6 adjacent to both sides of the connecting plate 4 and the male terminals 5 is formed. Punch out. The connecting plate 4 and the side plate 2 form a punching piece used for bending in the present invention.

Simultaneously with the punching, bending slits 3 are punched on both sides of the connecting plate 4 which is the punching piece, that is, between the connecting plate 4 and the side plate 2 which is the punching piece. The punching slit 3 is open at the lower end and the closed end 3'at the upper end along the length of the connecting plate 4 and the side plates 2, and the width of the slit 3 is made the same as the slit width by punching as shown in FIG. 10A. The plate material 1'is punched out to a width W1 which is equal to or larger than the thickness of the plate material 1 ', without being restricted by the narrowing condition. At this time, although not shown, the both ends of the punching slit 3 may be closed ends to be used for the bending.

The edge portion 8 of the punching slit 3 of the plate material 1'punched in this way is crushed by, for example, press working.
As shown in FIG. 8, FIG. 9 and FIG. 10B, the crushing process is performed by forming an edge portion 8 extending over the length of the slit 3 on one side surface of the plate material 1 ′, excluding the closed end 3 ′ of the punching slit 3. 3 is crushed, and a crushed edge portion 8'is formed on the same side surface side.

As described above, the closed end 3'is excluded from the crushing process to simplify the shape of the crushing jig. The crushed edge portion 8'is formed by performing a stamping process simultaneously with the stamping process of the stamped plate material 1'that forms the electric contact 1.
The punching slit 3 is narrowed over substantially the entire length. W2 indicates the width of the slit narrowed by the crushed edge portion 8 '.

The punched plate material 1'is formed as described above,
As shown in the enlarged view of FIGS. 1 to 5 and FIG. 10C, a punching piece connected to both sides of a connecting plate 4 as a punching piece, that is, both side plates 2 is bent through a punching slit 3 and the side plate 2 is bent. The elastic contact piece 6 is bent to form the electric contact 1. For example, in FIG. 8, the both side plates 2 are bent in opposite directions so as to bisect the width of the punching slit 3 along its length along a folding curve indicated by an imaginary line L, or the punching slit 3 is formed as a whole. Bend along the edge of to make a U shape.

As shown in FIG. 10C, the width W3 of the slit 3 formed by this bending is reduced to a width which is sufficiently narrower than the thickness of the punched plate 1'by the limitation of the crushing edge portion 8 '. . Preferably, the punched plate material 1 ′ is bent to the opposite side to the crushed side so that one side obtained by crushing the punched slit 3 is the outer side surface. In other words, the crushed edge portion 8'is formed on the side plate 2 or the side opposite to the bent side of the stamped piece.

[0018]

As described above, according to the present invention, even when it is difficult to punch a punching slit below the plate thickness because the electric contact is miniaturized and the plate thickness of the material is extremely thin, It is possible to easily narrow the punching slit to the plate thickness or less by punching a slit to a width that is possible without being limited to narrowing the punching slit, forming the crushed edge portion on this, and bending. it can.

By thus crushing and bending the edge of the bending slit of the electric contact, the width of the bending slit can be easily made narrower than the plate thickness of the electric contact.
This effectively solves the problem that each electric contact piece intervenes in the bending slit of the electric contact in each process such as cleaning, heat treatment, plating, and assembly. Entanglement can be effectively prevented.

As a result, various problems such as conventional plating defects and assembly defects in each of the above steps can be solved, and further, deformation due to entanglement and the like can be prevented to provide a highly reliable electric contact, and also the manufacturing yield. Can be dramatically improved. Further, since the entanglement of the electric contacts is eliminated, the automatic machine can be appropriately used for implanting the contactor substrate, and the production cost can be reduced.

[Brief description of the drawings]

FIG. 1 is a front view showing an electric contact according to an embodiment of the present invention.

FIG. 2 is a rear view of the same.

FIG. 3 is a side view of the same.

FIG. 4 is a plan view of the same.

FIG. 5 is a sectional view in FIG.

FIG. 6 is a development view showing a punching form of an electric contact.

FIG. 7 is a sectional view of the same.

8 is a development view showing a state where the edge portion of the punching slit in FIG. 6 is crushed.

FIG. 9 is a sectional view of the same.

FIG. 10A is an enlarged cross-sectional view of a punching slit.

FIG. 10B is an enlarged cross-sectional view of a punching slit that has been crushed.

FIG. 10C is an enlarged cross-sectional view of a punched slit that is bent.

[Explanation of symbols]

 1 Electric Contact 2 Side Plate 3 Slit 4 Connecting Plate 5 Male Terminal 6 Elastic Contact Piece 8 Slit Edge

Claims (2)

(57) [Claims] 1. An electric contact in which adjacent punching pieces are bent through a punching slit, a crushing edge portion for narrowing the slit is formed at an edge portion of the punching slit, and the crushing is performed. An electric contact, characterized in that the width of the slit between the edge portions is further narrowed by the bending so as to be narrower than the plate thickness of the electric contact. 2. The punching slit is open at one end and forms a closed end at the other end, and the crushed edge is formed at a longitudinal edge of the slit excluding the closed end. The electric contact according to claim 1.