JPS6161208B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for manufacturing a contact whose contact surface is plated with a precious metal.

Conventionally, when manufacturing contacts, one method was to change the shape of the part to be plated into the shape of a single contact member and apply barrel plating to it. Since the entire surface is plated with precious metals, there is a problem in that the material costs are high, and there is also a problem in that the plating thickness varies due to floating and overlapping.
In other contact manufacturing methods, the shape of the part to be plated is a continuous contact shape part, and partial plating is performed using a jig or coating it, but in such conventional examples, In addition to the problem that it takes time to handle the plating work, there is also the problem that the plating solution is often pumped out using jigs and the like, and impure liquid is brought in by these jigs and the like, which accelerates the deterioration of the plating solution.

The present invention has been provided in view of the above points, and aims to reduce material costs by applying plating to the necessary thickness only on necessary surfaces such as contact surfaces, and to make the plating thickness uniform. Furthermore, it is an object of the present invention to provide a contact manufacturing method that enables large-volume processing with a minimum number of jigs, thereby reducing the cost required for the contact manufacturing process, and further minimizing deformation of parts during the contact manufacturing process. This is the purpose.

An embodiment of the present invention will be described in detail below with reference to the drawings.
Reference numeral 3 denotes a material strip, which is a metal strip that serves as the base material of the contact member 5, and is formed by punching out a metal strip that serves as the base material of the contact member 5. A large number of corresponding contact-shaped portions 1 are formed in succession in the lateral direction, and a cut-out portion 2 for separation is formed in the continuous portion of each contact-shaped portion 1, 1.
Also, at both ends of this material strip 3, there are jig mounting pieces 6,
6 are formed, and through holes 7, 7 are bored in these jig mounting pieces 6, 6. Therefore, when plating is performed, a large number of material strips 3 as described above are used, and as shown in FIG. are arranged in parallel in contact with each other to form a rod body 4.
, each material strip 3... is the jig mounting piece part 6, 6
They are connected by inserting a suitable jig into the through holes 7, 7 and holding and fixing the jig mounting pieces 6, 6 with the jig. The rod body 4 thus bonded and formed as described above is immersed in a plating tank to be plated, and after the plating is completed, the material strips 3 are separated again, and the material strips 3 are then inserted into the notch 2. In this step, each contact shaped portion 1 is cut and separated to obtain a desired contact member 5 as shown in FIG. When the rod body 4 is immersed in a plating bath and plated, a plating layer is formed on the entire surface of the rod body 4.
In each material strip 3, excluding the material strips 3 at both the front and rear ends of the rod body 4, all of the contact shaped portions 1 of the remaining material strips 3 are attached to the contact contact surface 3a and the electrode surface 3b, which are the upper and lower end surfaces thereof. As shown in the figure, plating layer 8
will be formed. Here, the material strips 3 are in contact with each other under almost no pressure, and the plating liquid slightly enters between the contact surfaces of the material strips 3, as shown in FIG.
The plating layer 8 is formed so as to slightly cover both upper and lower surfaces of the contact shaped portion 1 in the thickness direction.

The contact member 5 formed as described above is used, for example, as a contact of a reed relay, as shown in FIG. In this reed relay, a lead plate 12 made of a thin magnetic material is inserted into a coil frame 11 around which a coil 10 is wound, and a yoke piece 14 made of a magnetic material is brought into contact with both magnetic poles of a permanent magnet 13. , a contact member 5 is fixed to the tip of each yoke piece 14, and one end of a lead plate 12 is interposed between the tips of both contact members 5. Here, the contact member 5 is made of a magnetic material and is fixed to the yoke piece 14 by welding. In this way, the contact contact surface 3a faces one end of the lead plate 12, and the electrode surface 3b is welded to the yoke piece 14.

As described above, in the present invention, each contact-shaped part is connected to another contact-shaped part and each material strip is brought into close contact with each other so that the part that does not require plating is adjacent to other members, so that the contact surface is Even though plating is only done on the parts that require plating, it is possible to perform the plating work in the same way as plating the entire surface.
This has the effect of minimizing the consumption and deterioration of the plating liquid and allowing a large amount of contact members to be obtained through one plating process. In addition, since the plating process only requires dipping the rod body into a plating tank, it is possible to plate a large amount of contact members even with small equipment, and the necessary jigs can be minimized, and the amount of plating solution pumped out is also minimized. Furthermore, the control of the plating thickness and the inspection of the plating condition after plating are streamlined, and the cost required for manufacturing contacts can be significantly reduced.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of a rod body according to an embodiment of the present invention;
Fig. 2 is an enlarged perspective view of the completed contact member as above, Fig. 3 is an enlarged sectional view of the material strip as above, and Fig. 4 is an enlarged perspective view of the completed contact member as above.
The figure is an exploded perspective view showing a reed relay using the present invention, 1 is a contact shaped part, 2 is a notch part, 3 is a material strip, 3a is a contact contact surface, 3b is an electrode surface, 4
is a lot type.

Claims (1)

[Claims] 1. A material strip that has a contact-shaped portion between a pair of adjacent notches in the longitudinal direction by forming notches facing the side edges in the width direction at multiple locations in the longitudinal direction of a strip formed in a flat plate shape. A large number of material strips formed in the same shape are overlapped so that adjacent material strips in the thickness direction are in contact with each other. The tool attachment part is held down and fixed with a jig to form a rod body made of multiple material strips, and after plating the entire rod body by dipping it into a plating bath, each material strip is removed from the jig. A method for manufacturing a contact, comprising separating the material strip, and then cutting the material strip at a position corresponding to each of the notches to separate each contact shape part.