Contact structure for improving closing reliability of electrical switch

Abstract

The invention discloses a contact structure for improving the closing reliability of an electrical switch, and the structure comprises a sliding block (1) and a static contact (4), a moving contact (2) is disposed in a mounting groove hole (101) of the sliding block (1) and is pressed by a spring piece (3), and the moving contact (2) contacts and separates from the static contact (4) along with the movement of the sliding block (1), thereby achieving the closing of the electrical switch. The contact structure is characterized in that the force application center of the spring piece (3) on thecorresponding moving contact (2) is located at one side, far away from the static contact (4), of the central axis of the moving contact (2). By adjusting the force application center of the spring piece, the force arm of the static contact for opening the moving contact during closing is increased, and the force required by the static contact during closing is reduced, so that the closing is smoother and easier.

Description

technical field [0001] The invention belongs to the field of electrical switches, and in particular relates to a contact structure for improving the closing reliability of an electrical switch. Background technique [0002] The isolating switch is a switching device that is mainly used to "isolate power supply, switch operation, connect and cut off small current circuits", and has no arc extinguishing function. When the isolating switch is in the off position, there is an insulation distance between the contacts that meets the specified requirements and an obvious disconnection mark; current switching devices. [0003] In the existing translational isolating switch, the static contacts are generally fixed on the base, and the moving contacts are installed on the slidable slider. Through the sliding of the slider, the moving and static contacts are separated and closed to realize the on-off of the switch. The existing translational isolating switch has the following defects...

AI Technical Summary

Problems solved by technology

The existing translational isolating switch has the following defects: 1. The spring piece is placed in the center of the moving contact. Due to the short arm of force, the force required for the static contact to open the moving contact is relatively large; 2. After long-term use , There will be arc slag particles after arc ablation on the surface of the dynamic and static contacts, which may cause the dynamic and static contacts to stick when closing, and the closing is unreliable

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