Wind pressure switch with contact self-cleaning function

Abstract

The invention discloses a wind pressure switch with a contact self-cleaning function. The wind pressure switch comprises a shell, a microswitch, a sliding adjusting piece and an inserting piece connecting structure, wherein the microswitch comprises a reed, a movable reed, a transmission piece and a static contact; the two ends of the reed are respectively inserted into the movable reed and the transmission piece, and one end, corresponding to the static contact, of the reed is provided with a movable contact; the sliding adjusting piece comprises a supporting column, and the inner end of thesupporting column forms a fulcrum which is abutted against or separated from the middle portion of the reed; and the inserting piece connecting structure includes a connection piece and a conductive insertion sheet, the conductive insertion sheet comprises a location section, a fixing section and a conductive section in order, one end of the connection piece is connected with the static contact, the other end of the connection piece is fixed with the location section, and the fixing section is fixed with the shell. According to the invention, the supporting column is taken as the fulcrum to adjust the height and adjust the elastic value of the reed, the movable contact and the static contact are subjected to friction and an oxidation film and dust at the surface of the static contact are removed to achieve an automatic cleaning function; and moreover, the conductive insertion sheet and the microswitch adopt the inserted connection, the firmness is stronger, and effectiveness of electric connection is effectively guaranteed.

Description

technical field [0001] The invention relates to the technical field of air pressure switches, in particular to an air pressure switch with a contact self-cleaning function. Background technique [0002] The air pressure switch uses air pressure to drive the diaphragm inside the switch to press down, and the air pressure pushes the micro switch to realize the closing work. Generally, the air pressure switch is composed of a base, a diaphragm, a micro switch and an upper cover. [0003] However, due to the influence of production cost and assembly process, the static contact and the moving contact of the micro switch are contacted and separated by micro pressure, and the surface of the contact will be oxidized and attached to dust under long-term working conditions, which has the characteristics of The following defects: [0004] (1) It is not easy to clean and difficult to maintain; [0005] (2) It is easy to cause poor contact of the contacts, and it is easy to fail; [0...

AI Technical Summary

Problems solved by technology

[0008] The technical problem to be solved by the present invention is that the contact force of the micro switch of the existing air pressure switch has poor contact force and is prone to failure

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