A pressure switch is a component that controls the connection and disconnection of a water pressure or air pressure control circuit，The mechanical diaphragm pressure switch is a common pressure switch, which can apply external pressure to the contacts of the mechanical switch through the diaphragm to control the connection and disconnection of the circuit.In the prior art diaphragm pressure switch, the material of the diaphragm is generally PET resin or cloth rubber, which has low strength, poor fatigue resistance and short life;The sealing performance of the cavity in the switch is relatively poor. Sometimes moist air or moisture will enter the switch, causing the contacts and contacts in the switch to rust or corrode, which seriously affects the service life of the pressure switch.
The purpose of the present invention is to provide a durable mechanical diaphragm pressure switch, which can effectively solve the problems of low strength, poor fatigue resistance, and poor cavity sealing performance of the diaphragm material in the prior art.The invention relates to a durable mechanical diaphragm pressure switch, which comprises an upper shell and a lower shell. A cross section in the upper shell is provided with elastic contact pieces, and a spring seat with a conical tip is arranged below the center of the elastic contact piece , The cross section of the lower shell is provided with a diaphragm, the connection between the diaphragm and the shell is provided with a sealing ring, and a pressure plate is provided on the sealing ring. A spring is installed between the spring seat above the ejector rod and the spring seat below the elastic contact piece. The upper shell is fixed with an upper wire. One end of the upper wire is connected with an electrical connector, and the other end is riveted on the elastic contact piece to form a movable For the contact, the top rod is fixed with a lower wire corresponding to the upper wire, the top of the lower wire is a static contact corresponding to the moving contact, and an annular protrusion is provided at the edge of the diaphragm.
The material of the diaphragm is nitrile rubber. The diaphragm gradually thins from the center to the edge. The cross section of the annular protrusion is circular. The connection between the upper shell and the lower shell and the outside of the upper shell are tightly covered with a protective sleeve. The material of the protective cover is rubber. The advantages of the present invention are that the material of the diaphragm is improved, the elasticity of the diaphragm is good, the strength is high, the sealing structure is improved, and the sealing effect of the pressure switch is enhanced.
Post time: Jan-01-2022