Contact system with heat dissipation unit

Abstract

The invention provides a contact system with a heat dissipation unit. The contact system comprises a moving contact, a rotary shaft of the moving contact, a jump buckle and a rotary shaft of the jump buckle, and a static contact. The contact system is characterized in that: metallic heat dissipation units are clipped between the rotary shaft of the moving contact and the rotary shaft of the jump buckle, and contacted with the moving contact; the metallic heat dissipation units are clipped on the rotary shaft of the moving contact, the rotary shaft of the jump buckle and reinforcing ribs between the rotary shaft of the moving contact and the rotary shaft of the jump buckle; and each metallic heat dissipation unit is a sheet body of which the thickness is 0.2 mm. In the contact system, under the condition of unnecessarily modifying the original shell, the sheet-shaped metallic heat dissipation units are clipped on the rotary shaft of the moving contact, the rotary shaft of the jump buckle and the reinforcing ribs between the rotary shaft of the moving contact and the rotary shaft of the jump buckle, so that the temperature rise of the whole circuit breaker is reduced, and the heat load capability of the shell of the circuit breaker is improved; and simultaneously, because the metallic heat dissipation units can dissipate the majority of heat generated by the moving contact to the outside, the structure of the moving contact can be reduced correspondingly, and the possibility of optimizing the internal space of the circuit breaker is further improved.

Description

technical field

[0001] The invention relates to a contact system with a heat dissipation unit. Background technique

[0002] Most of the existing circuit breakers are shaft-fixed plastic shell structures, in which the inner side of the half shell is preformed according to various switching components or components, and these components are partially fixed and partially movably installed in the inner cavity of the shell. To be precise, rib-shaped or strip-shaped protrusions are arranged on the inner side of the plastic housing to divide the inner cavity of the housing into a plurality of spatial areas of different sizes; on the other hand, a plurality of fixed sockets are arranged, each of which is provided with a Blind holes into which are pressed or glued shafts for rotatable support of the internal parts of the circuit breaker.

[0003] As we all know, due to the poor thermal conductivity of the plastic shell, this shaft-fixed plastic shell structure has the problem of sm...

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