Permanent-magnet magnetic blowing effect-based travel switch

Abstract

The invention relates to the field of switch equipment, in particular to a permanent-magnet magnetic blowing effect-based travel switch with capability of switching current of more than 2A. The permanent-magnet magnetic blowing effect-based travel switch comprises a base, an operating rod and a cover plate, wherein the two sides of the base are provided with an upper static contact piece and a lower static contact piece respectively, the upper static contact piece and the lower static contact piece are provided with contacts, the positions corresponding to the contact of the upper static contact piece and the contact of the lower static contact piece on the base are provided with permanent magnets, and a middle partition board is arranged between the upper static contact piece and the lower static contact piece; and the operating rod is provided with a return spring, a spring clamping position, a contact spring, a dynamic contact piece, a guide sleeve and a return contact spring. The permanent magnets play a role in magnetic blowing of an electric arc, so that the electric arc is quickly dispersed and the breaking capacity of the switch is improved. The middle partition board improves the insulating performance between the two contacts so as to greatly improve the reliability of the switch.

Description

technical field [0001] The invention relates to the field of switchgear, in particular to a travel switch based on the magnetic blowing effect of a permanent magnet which can break a current above 2A. Background technique [0002] Travel switch is a kind of position switch (also known as limit switch), and it is a commonly used small current master electrical appliance. The collision of the moving parts of the production machinery is used to make the contact act to realize the connection or break of the control circuit to achieve a certain control purpose. Usually, the limit switch is used to limit the position or stroke of the mechanical movement, so that the moving machinery will automatically stop, reverse movement, variable speed movement or automatic reciprocating movement according to a certain position or stroke. The limit switch has been widely used in industrial machinery and household appliances. It is used to control the stroke of mechanical equipment and protect...

AI Technical Summary

Problems solved by technology

At present, the general micro travel switch on the market only has the breaking ability of the current within 2A. When the DC power supply is above 2A, the general travel switch cannot control it, which will affect the mechanical progress and bring inconvenience to people.

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