JPS639769Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a wave-shaped spring pin, and aims to improve the strength and precision of a finished product, and to solve various problems in the production process.

A wave spring pin is a hollow cylindrical pin made by winding a thin metal plate and polishing its outer diameter, and is used as a connecting pin for electronic components.

The thin plate material of the pin is mainly a stainless steel plate or a copper alloy plate, or other materials are suitable depending on the purpose. For example, stainless steel is used as a shaft pin for a tape guide reel used in an audio cassette.

In conventional wave spring pins, the spring operating part on one side of the main body is formed entirely of waveform parts, so at both ends, part of the waveform appears at an acute angle, and that part However, the finished product remains in a very weak state in terms of strength.

In addition, due to its weakness in terms of strength, it may bend outward during the production process, resulting in the production of defective products.

The present invention aims to solve these problems and also to ensure safety in the production process and durability of the tool.

To explain the contents of the present invention according to the drawings, the spring actuating part 6 is formed in a wave-shaped spring pin in which one side in the longitudinal direction of a cylindrical main body 1 has a spring actuating part 6 facing each other with a wave-shaped gap. In doing so, the gist is that the vicinity of both ends are made into straight portions 3 along the longitudinal direction of the main body 1, and the entire area between the straight portions 3 is made into a wavy portion 2.

Since the straight portions 3 are formed near both ends of the main body 1 as shown in FIG. There were no more problems.

This also applies when the thin plate material shown in Fig. 2 is sheared in the unfolded state to make a mold of the entire body. It no longer felt weak. In fact, the shear strength was improved by 10% compared to the conventional product.

Therefore, when bending into a cylindrical shape due to the weak strength of the claw-like acute angles, there will be no production of defective products with bent ends, and there will be no variation in the overall length of the finished product, improving accuracy. The day came.

It has been proven through experiments that there is no risk of interfering with the original spring function even when the spring actuating section 6 has the straight section 3 as in the present invention.

When the entire spring actuating part is configured as a wave-shaped part, the sharp claw-like part may sting or cut the operator's hand during the production process, which is a problem in terms of work safety. In addition, there were cases where the ends of the finished spring pins got caught together, preventing smooth work, but since the straight part 3 is formed in the present invention, there is no possibility of accidental injury at the ends. This made it possible to avoid the problem of the ends getting stuck together or the ends getting caught.

In this case, by forming the gap 5 between the straight portions 3 to be slightly narrower than the gap 4 between the corrugated portions 2,
This has the effect of preventing the spring pins from becoming entangled with each other, eliminating the possibility of unexpected accidents.

A problem during the production process is that when shearing a thin plate material to form the corrugated part 2, if only the corrugated part 2 forms both sides of the thin plate, the entire blade of the shearing tool is a corrugated blade. As a result, both ends of the blade are particularly susceptible to stress during work, leading to rapid wear and short tool life.

However, with the present invention, both ends of the tool blade are straight, so there is no longer a problem with strength. In fact, tool life was tripled.

As described above, according to the present invention, it has become possible to provide a wave-shaped spring pin that is significantly improved in terms of strength and surface accuracy as a finished product, and is also advantageous in terms of safety in the production process and tool life.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of the spring pin. FIG. 2 is a perspective view of the main body before bending. In the figure, 1: main body, 2: waveform section, 3: straight section,
4: Gap, 5: Gap, 6: Spring operating part.

Claims (1)

[Claims for Utility Model Registration] (1) A wave-shaped spring pin in which one side in the longitudinal direction of a cylindrical main body is a spring-actuating part facing each other with a wave-shaped gap, in which the spring-actuating part is formed. A wave-shaped spring pin characterized in that the vicinity of both ends of the pin are straight parts along the longitudinal direction of the main body, and the entire area between the straight parts is a wave-shaped part. (2) The wavy spring pin according to claim 1, wherein the gap between the straight portions is formed to be slightly narrower than the gap between the wavy portions.