JPH01207902A - Electronic component - Google Patents

Abstract

PURPOSE:To reduce generation of wear powder and to maintain a stable contacting status for a long period of time by applying a contact grease containing carbon sulfide onto a fixed contact. CONSTITUTION:A movable contact 7 slides on a fixed contact 8 where an orefin contact grease 9 containing approximately 2% carbon sulfide with its grain diameter being 1-10mum. A fixed contact 8a consisting of carbon and a fixed contact 8b consisting of silver always electrically conduct through the movable contact 7. The both terminals of the fixed contact 8a are electrically connected to 10a and 10b and the one terminal of the fixed contact 8b is electrically connected to 10c. Thus, contact grease containing carbon sulfide which is superb in lubrication properties is applied to the fixed contact 8 so that carbon sulfide acts as a lubricant, thus reducing friction at electrically sliding contact part. It allows amount of wear powder generated by sliding life to be reduced, insulation deterioration to be controlled, and oxidation at contact part to be prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION Page 2 Industrial Application Field The present invention relates to electronic components used in the field of consumer equipment such as video and audio equipment, and industrial equipment such as measuring instruments.

BACKGROUND OF THE INVENTION FIG. 3 shows a contact structure in a conventional slide volume. A movable contact 1 slides over a fixed contact 2a made of carbon and a fixed contact 2b made of silver while maintaining electrical continuity. Fixed contact 2a has terminals 31L and 3b
It is electrically connected to, and voltage E is supplied from the outside.

The fixed contact 2b is electrically connected to the terminal 3C, and outputs a voltage V proportional to the position of the movable contact 1 to the terminal 3C. FIG. 4 shows a graph of output voltage changes due to sliding of the movable contact 1.

FIG. 5 shows a contact structure in a conventional slide encoder. In FIG. 5, a movable contact 4 slides over a fixed contact 6 & made of low-resistance carbon or silver and a fixed contact 6 b made of silver while switching on and off electrically. The fixed contact 3 bezo 5a is electrically connected to the terminal 6a, the fixed contact 5b is electrically connected to the terminal 6b, and is connected to an external power source, and by sliding the movable contact 4, as shown in FIG. Outputs an on/off signal.

Problems to be Solved by the Invention In the above configuration, the movable contact 1.4 and the fixed contacts 2a, 2b, 5a, 5b slide directly without the intervention of grease, so the frictional force is large. As a result, the amount of wear on both of them increased, and after the life test, the movable contacts 1 and 4 were exposed to the wear powder.
There were cases in which problems occurred in which the conduction condition deteriorated due to the electric current being lifted up.

Means for Solving the Problems According to the present invention, contact grease containing fluorocarbon is applied onto the fixed contacts.

Effect: According to the above method, contact grease containing fluorocarbon, which has excellent lubricity, is applied to the fixed contacts, so the fluorocarbon acts as a lubricant and reduces friction on the electrical sliding contact. This reduces the amount of wear debris generated. Furthermore, since fluorocarbon has a large specific volume resistivity, it can avoid dielectric breakdown even if the amount of abrasion powder of the brush and carbon increases to a certain extent.

Embodiment FIG. 1 shows a first embodiment of the present invention. A movable contact 7 slides on a fixed contact 8 coated with olefin contact grease 9 containing approximately 2% of fluorinated carbon having a particle size of 1 to 10 μm. Fixed contact 8a made of carbon
and the fixed contact 8b made of silver are always electrically connected via the movable contact 7. The fixed contact 8a has both ends electrically connected to the terminals 10a and 10b, and the fixed contact 8b
is electrically connected at one end to the terminal 10C. By external operation, the movable contact 7 switches to the fixed contacts sa and sb.
It slides on the top, and a voltage is output depending on the position.

FIG. 2 shows a second embodiment of the invention. A movable contact 11 slides on a fixed contact 13 coated with olefin contact grease 12 containing about 2% of fluorinated carbon having a particle size of 1 to 10 μm.

The fixed contact 13a made of 5benocarbon and the fixed contact 13b made of silver are always electrically connected via the movable contact 11. One end of the fixed contact 13& is the terminal 14a.
The fixed contact 13b is electrically connected at one end to the terminal 14b. Due to an external operation, the movable contact 11 changes to fixed contacts 13a, 13 whose sliding parts have become uneven.
b and outputs an on/off signal.

Effects of the Invention As described above, in the present invention, since the contact grease containing fluorocarbon is applied to the fixed contacts, the frictional force between the contacts is reduced, and the generation of wear particles is reduced. Furthermore, the generated wear powder is wrapped in grease and exists in an extremely fluid state, so the movable contact does not get caught up in the wear powder, making it possible to maintain a stable contact state for a long period of time. Become. Furthermore, by including fluorinated carbon having a high volume resistivity in the grease, there is also the effect of suppressing significant insulation deterioration of the grease due to abrasion particles.

As mentioned above, the adoption of fluorocarbon contact grease has many effects such as: 6-dimensional reduction in the amount of abrasion powder generated due to sliding life, suppression of insulation deterioration due to sliding life, and prevention of oxidation of contact parts. , it has become possible to extend the lifespan of conventional motors that had a lifespan of about 30,000 rotations to about 100,000 rotations.

[BRIEF DESCRIPTION OF THE DRAWINGS] Figures 1a and b are a front view and a top view of a first embodiment of the present invention, and Figures 2a and b are a front view and a top view of a second embodiment of the present invention. , Figures 3a and 3b are front and top views of the conventional example, Figure 4 is its output change characteristic diagram, Figure 6 is a top view of another conventional example, and Figure 6 is a diagram showing its output signal. be. 7, 11 - movable contacts, 8a, 8b, 13a. 13b...Fixed contact, 9.12 - Contact grease. Name of agent: Patent attorney Toshio Nakao and one other personQ
Tsuka Shirohana Hanawatsu L7′) [F] Hiroe+Qcs

Claims (6)

[Claims] (1) A fixed electrical contact formed by printing a conductor, and a movable contact that slides on the fixed contact while maintaining electrical continuity, and a contact grease containing fluorocarbon is applied on the fixed contact. Electronic parts made by coating. (2) The electronic component according to claim 1, wherein the electrically fixed contact is made of carbon. (3) The electronic component according to claim 1, wherein the movable contact sliding portion of the electrically fixed contact has an uneven shape. (4) The electronic component according to claim 1, wherein the contact grease is an olefin base oil. (5) The electronic component according to claim 1, wherein the content of fluorocarbon is about 2% (weight ratio). (6) The electronic component according to claim 1, wherein the fluorocarbon has a particle size of 1 to 10 μm.