Safe relay and movable contact spring therefor

Abstract

The invention discloses a safe relay and a movable contact spring therefor. The movable contact spring comprises a spring body of a straight sheet shape, one side of the head of the spring body is fixedly connected with a moving contact, and the tail of the spring body is provided with a connection portion fixed to a movable contact spring leading-out sheet; and the head of the spring body is alsoprovided with an extension portion which extends outwardly, the extension portion comprises a first extension portion, which is bent along the other side of the tail end of the head of the spring body for approximate 90 degree and extends, and a second extension portion which is formed by bending the tail end of the first extension portion towards the tail of the spring body for approximate 90 degree and extends. A forced guiding effect can be ensured, assembling is easy to realize, the assembling precision is high, part discarding tends not to occur during assembling, the relay is preventedfrom motion abnormity, and the relay safety is improved.

Description

technical field [0001] The invention relates to the technical field of relays, in particular to a moving reed used for a safety relay and a safety relay thereof. Background technique [0002] Relay (English name: relay) is an electrical control device, which is an electrical appliance that causes the controlled quantity to undergo a predetermined step change in the electrical output circuit when the change of the input quantity (excitation quantity) meets the specified requirements. It has an interactive relationship between the control system (also known as the input loop) and the controlled system (also known as the output loop). Usually used in automatic control circuits, it is actually an "automatic switch" that uses a small current to control the operation of a large current. Therefore, it plays the role of automatic adjustment, safety protection, and conversion circuit in the circuit. [0003] Safety relay (also known as forced-guided relay) is a kind of relay. The d...

AI Technical Summary

Problems solved by technology

[0004] 1. It is difficult to realize in assembly, the assembly accuracy is difficult to be guaranteed, and it is easy to cause unnecessary parts to be scrapped;

[0005] 2. The push card is easy to rub against the shell, causing the relay to operate abnormally;

[0006] 3. When the root of the moving reed breaks, the moving reed will fall obliquely into the base, and there is a possibility of mistaken connection with the static spring, which affects the safety of the relay

Images