Knife switch

Abstract

The invention provides a knife switch, for solving the problems of poor surface contact between a moving contact and a static contact, high temperature rise, unstable clamping force, large and unstable plugging force, large wearing amount of the contacts, and heavy damage of a conventional knife switch. The knife switch comprises an insulation base, a static contact fixed on the insulation base, and a moving contact movably connected with the insulation base, and is characterized by further comprising a surface contact spring and a fixation sleeve fixed on the insulation base. According to the invention, conventional line contact is upgraded to surface contact; the contact surface of the surface contact spring is parallel to the static contact so that the surface contact spring is in surface contact with the static contact, and the contact area is large; and the two ends of the surface contact spring are bent in a backward direction towards the static contact to form a deformation surface, when a plug is plugged into the gap in the middle of the static contact, the fixation sleeve produces pressure on the deformation surface of the surface contact spring, and the pressure is evenly distributed on a contact surface so that the acting force of the surface contact spring on the static contact can be evenly distributed, and the deformation of the static contact is avoided.

Description

technical field [0001] The invention relates to the field of knife switches. Background technique [0002] The existing knife switch includes a base, a moving contact piece and a U-shaped static contact piece. The U-shaped static contact piece is fixed on the insulating base, and one end of the static contact piece is movably connected to the base. The moving contact piece can be connected with the static contact piece. fit or separate. The U-shaped static contact piece is made of elastic material itself, and its lower end is fixed to achieve the purpose of close contact with the moving contact piece through the elasticity of the material itself. When the moving contact piece is inserted, it is required that the moving contact piece has conductivity and can generate a certain clamping force, so the static contact piece can only use special copper materials such as phosphor bronze. However, copper or alloy materials with elasticity such as phosphorus and molybdenum have gre...

AI Technical Summary

Problems solved by technology

[0005] The invention provides a knife switch, which solves the problem of poor contact between the moving contact piece and the static contact piece surface of the existing knife switch, temperature rise, unstable clamping force, large and unstable insertion and withdrawal force, large amount of wear of the contact piece, and damage to the contact piece. big problem

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