JPS5927005Y2 - relay - Google Patents

Description

[Detailed explanation of the idea] The present invention relates to a relay.

In general, organic gases generated from molded resin (organic gases generated from trace amounts of uncured parts or organic gases generated as the relay temperature rises) are affected by the arc generated when contacts are opened and closed, and by the catalytic effect of precious metal contact materials. Therefore, an organic polymer is formed and adheres to the contact surface as a brown powder.

It is well known that this brown powder affects contact performance and worsens the reliability life of relays.

Therefore, conventionally, a porous magnet (
The getter action (gas adsorption action) of Ba ferrite magnets, Sr ferrite magnets, etc.) reduces or removes the concentration of generated organic gases, thereby suppressing the generation of brown powder.

However, there is a drawback in that the getter action of the porous magnet (eg, Ba ferrite magnet) alone is insufficient to remove organic gases.

The present invention was devised in view of the above-mentioned drawbacks, and its purpose is to provide a relay that can provide a sufficient getter action to reduce or prevent contact failure.

The present invention will be explained below with reference to examples.

The drawing shows the structure of a polarized relay, in which a coil 2, an actuator 3, a yoke 4, and a permanent magnet 5 are mounted on a substrate 1 made of molded resin.
A drive mechanism made of a metal material such as the like is attached, and a metal cover 6 is placed on the substrate 1, with a space interposed between the metal cover 6 and the drive mechanism.

This metal cover 6 has an inorganic coating film 7 containing an inorganic adsorbent.
It is a formality.

Since the present invention is constructed as described above, the inorganic adhesive emits almost no gas, the inorganic adsorbent can adsorb organic gas, and the inorganic adhesive itself becomes porous when it hardens. It has the advantage of increasing the getter effect and increasing the removal efficiency of organic gas, improving the reliability and life of the relay.Furthermore, the formation of an inorganic coating provides complete insulation between the metal cover and the conductive part inside the relay. This has the advantage of preventing relay failure due to poor insulation.

Furthermore, although conventionally the gap between the metal cover and the internal mechanism is filled with resin such as epoxy, the present invention has the advantage that organic gas generated from the epoxy resin is eliminated.

Example 1 Molecular sieve 13X was crushed, made into a diameter of about 50 μm, mixed with an inorganic adhesive (Sumiceram 5LOA alumina silica system manufactured by Sumitomo Chemical Co., Ltd.) at a ratio of 1:1, and applied to the inner wall of the metal cover 6 with a brush to a thickness of 0.2 mm. did.

Thereafter, it was dried and cured at 100° C. for 1 hour and incorporated into a relay.

Example 2 Activated alumina was crushed to a diameter of about 50 μm, mixed with an inorganic adhesive at a ratio of 1:1, and applied to the inner wall of the metal cover 6 with a brush to a thickness of 0.2 mm.

Thereafter, it was dried and cured at 100'C for 1 hour and incorporated into a relay.

Example 3 An inorganic adhesive (alumina-silica-based inorganic adhesive, Sumiceram 5LOA manufactured by Sumitomo Chemical) was applied to the inner wall of the metal cover 6 with a brush to a thickness of 0.2 mm, and then dried and cured at 100° C. for 1 hour to be assembled into a relay. is.

Example 4 An inorganic adhesive was diluted with 14% water and applied to the inner wall of the metal cover 6 using a spray gun (thickness: 0.2 mm).
Thereafter, it was dried and cured at 100° C. for 1 hour and incorporated into a relay.

[Brief explanation of the drawing]

The drawing is a schematic cross-sectional view of one embodiment of the present invention, where 6 is a metal cover and 7 is an inorganic coating film.

Claims (1)

[Claim for Utility Model Registration] A relay with a metal cover covered with molecular sieve and activated alumina on the inner surface of the metal cover. A relay formed by forming an inorganic coating film using an inorganic adhesive containing an inorganic adsorbent such as silica gel.