Waterproof position limit switch

Abstract

The invention provides a waterproof position limit switch. The side surface of a base is connected with a socket and each surface is sealed; a cover plate of a switching group shell seals an opening at the top surface of the base; a button shell is connected with the upper part of the button hole of the cover plate, and mounting brackets are fixedly connected with the lower part of the cover plate; an electric conductor is embedded in an insulated cylinder of a combined button and the insulated cylinder of the combined button is arranged between two contact spring groups of the mounting brackets; a button at the top end stretches out the top hole of the button shell and a bottom end abuts against a compressed spring; each contact spring group has a pair of upper contact springs and a pairof lower contact springs; the combined button is connected with the upper contact springs normally and the button is pressed down to switch on the lower contact springs; high-temperature seal rings or gaskets are arranged between the combined button and the button shell and between the socket and the base; the base and the cover plate are welded, and the button shell is in threaded connection with the cover plate and fastened with a nut, thus ensuring the overall sealing and waterproofness of the switch; and the upper and lower edges of a cuboid at the lower part of the combined part are provided with grooves which are matched with the contact springs so as to smoothly slide the electric conductor. The switch adapts to the high-temperature and high random vibration environment and is goodin waterproofness, high in reliability, compact in structure and simple and convenient to assemble and debug.

Description

(1) Technical field

[0001] The invention relates to a travel switch of an electrical device, in particular to a waterproof travel switch adaptable to a 400-degree high temperature and high random vibration environment. (2) Background technology

[0002] The travel switch is also called a position switch or a limit switch. Its function is to convert the mechanical displacement into an electrical signal to change the operating state of the motor, that is, to automatically stop, reverse, change speed or cycle according to a certain stroke, so as to control the mechanical movement or realize safety protection. Different types of limit switches are widely used in automatic control systems in various industries.

[0003] In order to meet the requirements of different occasions, various series of limit switches have been developed. There are many types of waterproof limit switches, and their shells are sealed to be suitable for use under overall immersion and rain conditions. How...

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