Contact spring and brush contact element applying same

Abstract

The invention relates to the field of electrical connectors, in particular to a contact spring and a brush contact element applying the same. The contact spring comprises a mother ring, at least one cantilever-type elastic contact finger is arranged on the inner side of the mother ring, each elastic contract finger comprises a fixing end located on the mother ring and a contact end gradually drawing close to the center line of the mother ring, and the contact end gradually shifts to one side of the mother ring and protrudes out of the corresponding side face of the mother ring during the process of drawing close to the center line of the mother ring. During use, the contact spring can be pressed on corresponding electric slip rings in a contact mode through the elastic contact fingers; a filamentous brush contact element in the prior art is abandoned, so that requirements on transmission power of the brush contact element can be met by means of adjusting thickness, diameter and the like of the contact spring; due to change in contact structure, the elastic contact fingers can be matched with the electric slip rings larger and thicker in size, so that the transmission power of the electrical connectors can be improved on the premise of not increasing the axial size of the electrical connectors.

Description

technical field [0001] The invention relates to the field of electrical connectors, in particular to a contact reed and a brush contact using the contact reed. Background technique [0002] The brush contact and the electric slip ring are the two core components in the rotary electrical connector. The brush contact is often fixed on the housing of the electrical connector, while the electric slip ring is fixed on a rotating shaft , When the rotating shaft rotates around the axis, the brush contacts cooperate with the electric slip ring to realize the uninterrupted transmission of electric signals. Most of the current brush contacts are filamentary, which are in the shape of a splayed and clamped on the corresponding electric slip ring. They mainly include composite brush block type, precious metal monofilament type and fiber brush type. For example, the application number is 201010227485 , 2010202597743, 201020597669, 201020259764X, 2010202597739, 2010202429625, 20102025976...

AI Technical Summary

Problems solved by technology

[0003] The above-mentioned brush contacts and electric slip rings have been widely used in rotary electrical connectors, but when the electric slip ring is used to transmit high power (current greater than 200A), due to the single brush contact of the above structure The power of components and electric slip rings is limited, so it is necessary to use multiple parallel connections to transmit power together. However, due to the influence of machining, assembly and other factors, the actual power of each transmission line is not the same. In this case, when When the design power redundancy of brush contacts and electric slip rings is small, individual paths may burn out due to the difference in actual transmission power, resulting in failure of the entire electrical connector; when the power design redundancy is large , it is necessary to increase the axial dimension of the electrical connector accordingly. In this way, a lot of material will be wasted, and the cost of the product will also increase accordingly.

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