Relay

Abstract

A relay comprises: a solenoid; a hermetically sealed chamber mounted at a lower end thereof with a cylinder into which a center portion of the spool is inserted, mounted at an upper end thereof with a pair of stationary terminals each provided at a stationary contact point and filled therein with insulating gas to be coupled at an upper portion of the spool; an insulation member insulating the chamber and the stationary terminals; a movable unit including a shaft, a conductive movable terminal, and a pair of movable contact points; a restoring spring to pull the shaft toward the lower surfaceof the cylinder; and an insulated sliding guide to guide the movable unit that is moved by the solenoid and the restoring spring.

Description

technical field [0001] The invention relates to a relay, in particular to a relay in which a movable contact and a fixed contact can still be stably and accurately contacted and conducted after an arc is generated. Background technique [0002] A relay is an electric switching device that acts as an electrical relay, and usually refers to a connection switching device that turns on or cuts off the main circuit through a small change in input current. The types of relays mentioned above include contact relays, non-contact relays, pressure relays and photorelays, etc. Among them, contact relays are often used in automobile turn signal or wiper motors because of their simple structure. [0003] figure 1 An embodiment for the above-mentioned contact relay, such as figure 1 As shown, the existing relay includes: an electromagnet 1; a movable rod 2, which is adsorbed and moved by the operation of the above-mentioned electromagnet 1; a movable contact 3 is arranged at one end of ...

AI Technical Summary

Problems solved by technology

[0009] In addition, in the existing relay, because the movable rod 2 is not guided when it is attracted or detached by the electromagnet 1, the movable contact 3 provided at one end of the movable rod 2 may not be able to contact correctly. Fixed contacts 4 and 5 on the above upper and lower parts

The above-mentioned problem causes resistance to be generated at the contact portion of the above-mentioned movable contact 3 and the above-mentioned upper and lower fixed contacts 4, 5, and the above-mentioned resistance generates unexpected heat, thereby damaging the above-mentioned movable contact 3 and the above-mentioned upper and lower fixed contacts. point 4, 5

[0010] In addition, even if the existing relay has a part that guides the movable rod 3, since the above-mentioned part cannot conduct electricity with the above-mentioned movable rod 2, the above-mentioned part must be made of an insulator such as plastic.

However, because insulators such as the above-mentioned plastics generally have poor wear resistance, the contact friction generated with the above-mentioned components when the above-mentioned movable rod 2 moves will generate dust on the above-mentioned components.

In addition, the dust generated by the above-mentioned components will adhere to the above-mentioned movable contact 3 or the above-mentioned upper and lower fixed contacts 4, 5 and hinder its conductivity.

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