Switch of electric tool

Abstract

The invention discloses an electromotion tool switch that comprises shell and a switch one end of which extends out of the shell, the first, the second, the third static contactor are set at the bottom of the shell, besides, the forth static contactor is set in the shell; the shell possesses landscape orientation channel, said switch arm is set in the channel, the first dynamic contactor which is contacted with the first static contactor is set on bottom of the switch arm, the turn part of the first static contactor which is at side of the switch arm is connected with the second and the third dynamic contactor which are corresponding with the second and the third static contactor, boss id set on the side surface of the switch arm, during the movement of the switch, the first dynamic contactor is contacted with the second and the third static contactor, synchronously, the switch arm can control the contact between the second and the third dynamic contactor and the corresponding second and the third static contactor. The switch possesses two independent loops, and it is two-contactor contact, it can branch off, and decreases the radiation, the reliability of switch is good, the service life is extended.

Description

technical field [0001] The invention relates to an electric switch, in particular to an electric tool switch with double circuits. Background technique [0002] At present, the electric tool switches on the market are all single-circuit. When a single-circuit switch passes a large current during operation, the current is very large at the moment of on and off, and a strong electric spark will appear between the switch contacts. It causes a large electric corrosion phenomenon to the contact point of the switch, which makes the contact point age and finally damages the switch. In addition, the single-circuit switch has a large current during the power-on operation process. When a large current passes through the switch, the contact piece of the switch will heat up, and the heat will be transferred to the plastic support that is in contact with the contact piece, causing the temperature of the plastic support to rise. , when the temperature rises to a certain level, the plasti...

AI Technical Summary

Problems solved by technology

[0002] At present, the power tool switches on the market are all single-circuit. When a single-circuit switch passes a large current during operation, the current is very large at the moment of on and off, and a strong electric spark will appear between the switch contacts. Causes a large electric corrosion phenomenon to the contact point of the switch, aging the contact point and finally destroying the switch

In addition, the single-circuit switch has a large current during the power-on operation process. When a large current passes through the switch, the contact piece of the switch will heat up, and the heat will be transferred to the plastic support that is in contact with the contact piece, causing the temperature of the plastic support to rise. , when the temperature rises to a certain level, the plastic support will be deformed due to high temperature, which will cause the contact piece to shift and make the switch invalid, which not only shortens the service life of the switch, but also poses a safety hazard

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