Explosion-proof key switch

Abstract

The invention relates to an explosion-proof key switch. The technical problem to be solved by the present invention is to provide an explosion-proof key switch with simple structure, low cost, reliable operation and convenient operation. The technical solution to solve this problem is: an explosion-proof key switch, with a switch base and a cover plate, a switch lock cylinder and a rotating shaft connected to each other are arranged inside the switch base, the output end of the rotating shaft extends through the cover plate to the outside of the switch base, and the The micro switch matched with the output end of the rotating shaft is characterized in that the input end of the rotating shaft is installed on the switch seat through the copper sleeve of the outer jacket, and the gap between the copper sleeve and the rotating shaft and the switch seat is less than 0.2mm, and the length of the gap is greater than 12.5 mm, less than 30mm, there is a notch on the end surface of the output end of the rotating shaft, and the power end of the elastic rod installed on the micro switch is provided with a roller in contact with the longitudinal section of the notch, and the other side of the power end of the elastic rod is in contact with the moving contact . The invention is mainly applicable to explosion-proof vehicles under various explosive gas environments.

Description

Technical field [0001] The invention relates to an explosion-proof key switch. Mainly suitable for explosion-proof vehicles in various explosive gas environments. Background technique [0002] The key switch is an indispensable electrical component for starting the work of the vehicle. However, in various work vehicles containing explosive gas mixtures, ordinary key switches cannot be used at all. At the same time, there is no official commercial sale of explosion-proof key switches. Some of the key switches for explosion-proof vehicles are realized by ordinary key switches driving a set of lever mechanism to turn on and off self-made contacts. The structure is complex and heavy, and it is extremely prone to failure; some require several actions to start the vehicle, which is inconvenient to operate. Summary of the invention [0003] The technical problem to be solved by the present invention is to provide an explosion-proof key switch with simple structure, low cost, reliable wo...

AI Technical Summary

Problems solved by technology

[0002] The key switch is an essential electrical component to start the vehicle. However, in various operating vehicles containing explosive gas mixtures, ordinary key switches cannot be used at all. At the same time, there is no official commercial sale of explosion-proof key switches. At present Some of the key switches for explosion-proof vehicles use ordinary key switches to drive a set of lever mechanisms to switch on and off self-made contacts. The structure is complex and heavy, and it is easy to cause failures; some need to go through several actions to start the vehicle, which is inconvenient to operate.

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