Button switch

Abstract

The invention discloses a button switch. The button switch comprises a shell, a pressing element connected to the shell in a sliding mode and a contact bridge located in the shell. A movable contact is arranged at one end of the contact bridge and corresponds to a stationary contact arranged on a first terminal, and the other end of the contact bridge is matched with a second terminal to form a rotating supporting point; an elastic connecting piece is arranged between the middle of the contact bridge and the pressing element, and a switch-off elastic piece is arranged between the middle of the contact bridge and a base of the shell; when the pressing element is touched to lock the button switch, the contact bridge rotates downwards around the rotating supporting point under the action of the elastic connecting piece, and the movable contact is connected with the stationary contact; when the pressing element is touched to unlock the button switch, the contact bridge rotates upwards around the rotating supporting point under the action of the switch-off elastic piece, and the movable contact is separated from the stationary contact. The button switch is simple in structure, high in switch-off speed, short in arc discharge time and large in contact capacity.

Description

technical field [0001] The invention belongs to the field of electrical switches, in particular to a button switch. Background technique [0002] The button switch is a commonly used electrical switch. The existing button switch is mainly composed of a button, a mounting seat, a lock shaft, an upper spring, a contact bridge, a lower spring, a terminal, a base, a base cover, and a contact. Two contacts are riveted on the bridge, and one contact is riveted on each of the two terminals. When the button is pressed down for a certain distance, under the action of the upper and lower springs, the moving contact on the contact bridge is in contact with the static contact on the terminal. The circuit is connected, and the switch is reset after pressing the button, and the circuit is disconnected. [0003] For example, Chinese patent document CN201796770U discloses this type of push button switch, which includes two contacts arranged on both sides of the contact bridge 4 and two sta...

AI Technical Summary

Problems solved by technology

Due to the large number of contacts, the cost is high; and, because the contact area suddenly becomes larger or smaller when the dynamic and static contacts at both ends are in contact, the current density at the contact point increases, the electrodynamic repulsion is large, and the switching reliability is poor. At the same time, the disconnection of the button switch is realized by the spring reset on the upper side of the contact bridge after the button is moved up, and its disconnection speed is slow, resulting in long arcing time and low switch capacity

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