JPS60216415A - Method of producing multicontact contactor used for small-sized electronic part - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Akira Kito is concerned with a method for manufacturing elastic multi-point contacts for use in small electronic mechanical components such as small variable resistors and switches. It is desirable that the movable contact that comes into contact with the resistor of a variable resistor or the switch ID of a switch is stable and as low as possible, and it is desirable that the sliding life is long. It is well known that increasing the contact pressure of the movable contactor lowers and stabilizes the contact resistance, but in this case there is a problem that there is a lot of wear between the contacts (sliding life is shortened, and the sliding contact It is also known that the contact resistance of the secondary contact portion decreases as the number of mutually independent contacts increases, and that the contact resistance decreases in inverse proportion to the number of mutually independent contacts. The greater the number of contacts, the higher the reliability of the contact.Also, in a variable resistor, the more independent contacts there are, the lower the dynamic noise will be, and in the case of a switch, the noise and chatter during switching will be reduced. The greater the number of mutually independent contacts, the better the performance.

Traditionally, due to the miniaturization of electronic components for performance and cost reduction reasons, contactors have been designed so that the largest number of individual contact pieces are independent of each other for the contact width that can be designed. In addition, it is desired that the contact portion of each contact piece has a size that satisfies the performance as a contact point.

There are many structures for these multi-contact contacts, and the main ones are as follows: 1) Metal wire pressed into a coil. (Jikko 44-56
31, Jitsukasho, 1fl-68636 Rev.) 2) A plurality of metal wires that are partially adhered by plating or soldering, etc., and then processed into an appropriate shape. (Special Public Interest Publication 53-10
2, Special Publication No. 531,465, etc.) 3) A metal plate punched into a comb shape and then processed into an appropriate shape.

4) After making cuts in the metal plate by shearing and spreading it out into a fan shape to form many legs of different lengths, this...?
The leg is bent diagonally to the longitudinal direction and further processed into an appropriate shape. (U.S. Patent No. 3,974,471;
, 569.897 > etc.

However, 1) and 2) above have wire sliders, and 1)
This method has the disadvantage that the independence of each contact point is insufficient, and furthermore, it requires an auxiliary means such as an additional elastic body such as elastic rubber, which increases the cost.

In addition, the method 2) above requires a large number of manufacturing steps and is expensive, and the method 3) above has been conventionally used. Since the gap cannot be made very narrow in terms of the mechanical strength of the punch, there is a limit to the number of contact pieces that can be made from a metal plate of a certain width, and the number of multiple contact pieces in the contact is limited. was reduced by the sum of the gaps between them. In addition, in the case of 4) above, the number of droplet contact pieces can be made smaller compared to the comb-like slider of 3), so the number of contact pieces can be increased. Although the improvement in performance was remarkable, it had the drawback of requiring difficult and precise processing steps.

Furthermore, in general, in the above 1), 2), and 4), the contact pressure and spring range of one contacting element are small, and the reliability is insufficient, making it difficult to ensure stable contact individually. I felt regret.

The purpose of this book is to improve the above-mentioned drawbacks, and in particular, to improve the ease of manufacture and reliability of the method for manufacturing a multi-contact contactor with an improved structure (4).

Here, as an example of a method for manufacturing this type of conventional product, the configuration shown in U.S. Pat. No. 3,974,471 will be described.
Figures Kl and (E"lK) are plan views of the state after shearing and before bending. 6I is a plan view of the state after shearing and before bending. Form J
41g indicates a bent portion. The figure (→ is a perspective view showing the state after bending by dSm. Here, 71 indicates a narrow gap between the contact pieces,
Reference numeral 10- indicates a contact protrusion, and reference numeral 119 indicates a multi-contact contactor. As shown above, due to the bending process d and a, the gap 2' between the contact pieces has a narrow width 1! lj7' is constructed so that the sliding contact pieces do not contact each other and are independent. However, the above method has the disadvantage that the processing process is complicated and processing is difficult, and the contact piece 6I tends to lack independence and uniformity near its base1.This fI117 solves these disadvantages. In other words, by shearing, a slit is made in the longitudinal direction of the elastic metal plate, leaving connecting parts at both ends, and along the slit, a sill is applied by patterning, and a joint is made between the 16 contact pieces. After creating the necessary gaps in order to perform spring action independently of each other, a contact protrusion of an appropriate shape is formed by bending, and one of the connecting parts is provided with a mounting tongue,
A method for manufacturing a multi-contact slider, characterized in that a means for attaching to a contact holder such as a mounting hole is provided, and finally the other connecting portion is cut to make each contact independent. It is easy to process the contact piece, and each contact piece has a uniform shape.This will be explained with reference to Figures 1 to 5, which show embodiments of the present invention.

Figures 1 to 5 show an embodiment of the method for manufacturing a multi-contact contactor according to the present invention.
The figure is a plan view after the contact piece has been embossed along the cut, Figure 3 is a side view of the edge after bending and contact protrusion processing, and Figure 4 is the plane A-A in Figure 2. A key diagram showing the cross section of (
1 indicates an arc shape, (+2) indicates a V-shaped pattern, and
Figure 5 is a perspective view before cutting one of the connecting parts.

In the figure, 1 is a spring metal plate or band, 2 is a cut made by shearing, and there are connecting parts 3 at both ends.
4 left. A plurality of narrow plate portions 5 of the same shape formed in the middle of the cut 2 have an arcuate, V-shaped, or U-shaped cross section as shown in FIGS. 2 and 4.
A plurality of contact pieces 6 are formed by embossment processing parallel to the length direction of the contact pieces 6, and as a result, a very narrow space 1117 of a constant width is provided between each contact piece 6. Next, as shown in FIG. 3, each contact piece 6 is bent downward in the vicinity 3d of the connecting portion 3. This bending process 3d can be performed simultaneously with the above-mentioned embossed process. At this time, for the purpose of spring performance and ease of bending, one or more processed parts of the bent part 3d are removed.
As shown in Figure 3, it is better to bend at the flat part on the outside of the embossed part.

In addition, one of the connecting parts 3 has a mounting hole 8 or a mounting piece 9 as shown in FIG. A mounting means such as a mounting piece 9 is provided on the next KS contact piece 6.Next, the KS contact piece 6 has contact protrusions arranged in a row perpendicular to the longitudinal direction near the connecting part 4 on the opposite side of the connecting part 3 having four means. The portion 10 is provided to protrude downward.

Finally, FIG. 5 shows the contact protrusion 10 and the connecting portion 4,
Here, as shown in FIG. 3, after processing the pattern, do not cut at the chain line part B, but instead make the distance between the connecting part 4 and the contact protrusion 10 sufficiently long, and cut the connecting part 4 along the chain line part B. It may also be bent upward like 14.

The multi-contact point of the present invention t? Since the method for manufacturing the tentacle is configured as described above, there is no complicated three-dimensional precision machining, and the machining is relatively easy. This makes it possible to achieve high productivity and reliability.

←) The utilization rate of materials is high, and in addition to the factors mentioned in (a), the cost is also low.

el With the same width, more contact pieces can be formed compared to the conventionally used comb-shaped multi-contact contactor described in 3) above.

■ Each contact piece thus manufactured can contact each other while maintaining their independence.

(E) Because of the arc or V-shaped lip, each contact piece has relatively high rigidity, and even if the contact piece is downsized, sufficient contact pressure can be maintained.

etc., it is possible to provide a method for manufacturing a multi-contact contactor that has great practical effects.

[Brief explanation of drawings]

Figures 1 to 6 show an embodiment of the method for manufacturing a multi-contact contactor according to the present invention, Figure 1 is a plan view after adding cuts, '3
The Ifz diagram is a plan view after the contact piece has been embossed along the cut, the tooth 3 diagram is a side view after bending and the contact protrusion have been worked, and Figure 4 is the O? - 1- 2 Figure A-2 shows the cross section of the mu surface, C) shows the circular arc shape, middle) shows the V-shaped embossed pattern, and fang 5 shows the cross section before cutting one of the connecting parts. FIG. Figure 6 shows a conventional example, in which (a) is a plan view before bending, and (b) is a perspective view after bending. 1: Spring metal plate, 2 = Cut, 3.4 = Connecting part,
5=Narrow plate-like part, 6: Contact piece 72 gap, 10
: Contact protrusion, 11: Multi-contact contactor, B: Cutting line 0'1=! H'

Claims (2)

[Claims] (1) Connecting portions 3.4 are left at both longitudinal ends of the strip-shaped elastic metal plate l, and 2tl cuts parallel to the longitudinal direction of the metal plate 1 are made between the connecting portions 3.4 to form a plurality of connecting portions that touch each other. A narrow plate-like part 5 is provided, and then a number of processes are performed on both sides of each plate-like part 50 so that the cross section becomes V-shaped or U-shaped with an upward opening. 5 minute intervals with no contact with each other! ! 7, and then a contact protrusion 10 is formed near the connecting portion 4 to form a plurality of contact pieces 6 arranged in parallel with the plate-shaped portions, and a heavy weight that is fixed to the slider mounting body is attached to the connecting portion 3. Manufacture of a multi-contact contact for use in small electronic components, characterized in that a connecting means is provided, and one connecting portion 1 close to the contact protrusion 10 is finally cut to make each contact piece 6 independent. Method. (2) A method of manufacturing a multi-contact contactor for use in the small electronic component described in item 1, in which the connecting portions 4 are not cut and the connecting portions -/- 8, 4 at both ends are left.