JPS60109112A - Contactor - 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] The present invention relates to contacts used in electronic devices and the like.

A contactor that sends an electric signal or current by contacting an electrode with pressure is composed of a metal plate spring for applying pressure and a contact point.

Generally, metal plate springs are made of phosphor bronze, and contacts are made of phosphor W.
Silver or gold plated copper or carbon contacts are used. In the case of a contact with such a structure, if the contact is made of phosphor bronze plated with silver or gold, a part of the leaf spring is used as the contact part, but in the case of a silver-plated contact, the contact part becomes sulfurized in the atmosphere.

It has the disadvantage of causing oxidation and causing a large change in contact resistance.

Furthermore, gold-plated contacts have excellent corrosion resistance, but have the disadvantage of being expensive. Furthermore, carbon contacts have excellent corrosion resistance and durability, but have the disadvantage that they require troublesome work to attach to phosphor-plated copper plate springs by press-fitting, etc., and cannot be manufactured at low cost.

In order to eliminate the above-mentioned problem with WF, we have considered giving the carbon material a leaf spring effect9. For example, we have considered making the carbon material into an ultra-thin plate shape and providing a protrusion at the tip to use it as a contact point, but the carbon material is essentially Since it is a brittle material and has weak mechanical properties, there is a risk of breakage if it is made into an ultra-thin shape.

SUMMARY OF THE INVENTION An object of the present invention is to provide an inexpensive and high-performance contact that eliminates the above-mentioned drawbacks.

As a result of studying a contact that has a strong leaf spring effect while taking advantage of the chemical stability and conductivity of carbon materials, the inventor found that it is effective to use a composite material of carbon fiber and resin. .

This invention relates to a contact that is used in a contact mechanism that conducts current and is made entirely of a composite material of carbon fiber and resin.

In the present invention, the diameter, length, and material of the carbon fibers are not limited as long as they can maintain strength and conductivity as a contact.

The resin is not limited as long as it works as a bonding material for carbon fibers, but it should be one that does not deform even if the temperature rises to some extent, and a thermosetting resin is preferable.

The blending ratio of carbon fiber and resin is selected within a range that maintains desired electrical conductivity and mechanical strength.

Although the main components are carbon fiber and resin, it is also possible to add, for example, 3 to 30 parts by weight of graphite powder to improve sliding performance and conductivity.

Compounded products are molded using compression, transfer, injection, and other molding methods.
If necessary, heat treat the molded product to stabilize it.

Next, the present invention will be explained in detail.

45 parts by weight of carbon rim M# (manufactured by Kureha Chemical Industries, Ltd., trade name Kurekachomp), 40 parts by weight of phenolic resin (manufactured by Hitachi Chemical Co., Ltd., trade name VP-11N), artificial graphite powder under a 100 mesh sieve (Hitachi A lump obtained by putting 15 parts by weight of pulverized PD-11 (manufactured by Kasei Kogyo Co., Ltd., trade name) and 6 parts by weight of methanol in a kneading machine and gradually heating it under reduced pressure to 40°C to remove the solvent. average of 150 items
It was crushed into a molded powder. A contact 5 having the shape shown in FIG. 1 was obtained by injection molding this molded powder. Figure 1 shows a contactor for grounding static electricity from the cylinder of a VTR, with reference numeral 1 indicating a contact section, 2 indicating a leaf spring section, and 3 indicating a mounting section.

The contactor 5 obtained as described above is shown in FIG.
Mounting base 6 and cylinder 4 are attached to hardened cylinder 4 and mounting base 6 of 5US420J2 that magnetizes the TR tape.
Due to the difference in height from the top surface of
The vehicle was operated for 0 hours.

As a result, the amount of wear on the contact part 1 is 0.1 mm, and the contact resistance with the mating electrode is stable at 50Ω, which does not increase to more than IKΩ due to oxidation, sulfidation, etc., as with conventional silver-plated contacts. There is no.

The contactor of the present invention has no chemical change in the contact portion.

Stable contact resistance allows long-term use.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of a contactor according to an embodiment of the present invention, and FIG. 2 is a diagram showing a state in which the contactor shown in FIG. 1 is attached. Explanation of symbols 1...Contact part 2...Flat spring part 3...Mounting part 4...7S/Der 5...Contactor 6...Mounting stand agent Patent attorney Kunihiko Wakabayashi 10th 24th], 9

Claims (1)

[Claims] 1. Contact A contact element that is used in a contact mechanism that conducts current by pressurizing a gold-plated mating electrode, and is made entirely of a composite material of carbon fiber and resin.