Bistable permanent magnetic switch for printing device

Abstract

The invention relates to a bistable permanent magnetic switch for a printing device. The bistable permanent magnetic switch comprises opening and closing induction magnetic steel, a non-magnetoconductivity valve body, a permanent magnetic valve core, a closing assembly and an opening assembly; the opening and closing induction magnetic steel and the permanent magnetic valve core are correspondingly arranged; the permanent magnetic valve core is arranged in the non-magnetoconductivity valve body; when the opening and closing induction magnetic steel and the permanent magnetic valve core are arranged in an opposite pole corresponding mode, the permanent magnetic valve core is connected with the closing assembly to block a channel which is formed in the non-magnetoconductivity valve body and accordingly the closing action is achieved; when the opening and closing induction magnetic steel and the permanent magnetic valve core are arranged in a same pole corresponding mode, the permanent magnetic valve core is connected with the opening assembly to open the channel which is formed in the non-magnetoconductivity valve body and accordingly the opening action is achieved. Compared with the prior art, the bistable permanent magnetic switch for the printing device is high in reliability, high in sensitivity and the like.

Description

technical field [0001] The invention relates to a permanent magnet switch, in particular to a bistable permanent magnet switch used in printing equipment. Background technique [0002] At present, most of the switches of printing equipment are pull-type and push-button switches, and their structures are basically the same. It is a cylinder that can stretch and slide in a lumen. and slide on both sides of the contact piece to make the contact piece move quickly to complete the switching task. There are two sliding frictions in this switch, that is, the sliding of the cylinder on both sides of the contact piece and the telescopic sliding of the cylinder. These two slidings need to rely on lubricating oil. If the manufacturing process is not good, the sliding friction will be too large. It often results in hard pressing or even no movement, and poor contact is prone to occur. Due to the existence of sliding friction, the middle and low-grade switches are generally not pressed...

AI Technical Summary

Problems solved by technology

There are two sliding frictions in this switch, that is, the sliding of the cylinder on both sides of the contact piece and the telescopic sliding of the cylinder. These two slidings need to rely on lubricating oil. If the manufacturing process is not good, the sliding friction will be too large. It often results in laborious pressing or even no movement, and poor contact is prone to occur

Due to the existence of sliding friction, the middle and low-grade switches are generally not pressed smoothly, and the failure rate is very high.

This kind of switch cannot make its size very thin, and its structure is more complicated

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