High-temperature-resistant long-lifetime switch pull head assembly

Abstract

The invention provides an electric switch pull head assembly, which is characterized in that alumina ceramic is used as a raw material to make a ceramic pull head, and meanwhile, the alumina ceramic is used as a raw material to make a ceramic tube and then, a copper support head; the head portion of the copper support head is conical in shape; the body and tail portions of the copper support headare cylindrical in shape; the cylindrical body of the copper support head is matched with an inner hole in the ceramic tube; and the tail portion of the copper support head extends a certain size to install a spring. Through application of high temperature resistance and wear resistance of the ceramic and abrasion resistance between copper and copper, the service life of the switch pull head is greatly prolonged.

Description

Technical field [0001] The invention relates to an electric switch dial assembly, in particular to a high-temperature resistant long-life switch dial assembly. Background technique [0002] At present, there are the following types of electric switch dial assemblies on the market. The most common one is that a plastic support is set in the inner hole of the plastic dial. Due to the limited high temperature resistance of the plastic, it generates heat when the silver contacts are in contact. Especially when the surface of the silver contact is oxidized to produce continuous ignition, the plastic support is deformed, causing damage to the switch. There is also a metal support in the inner hole of the plastic dial. Due to the heat conduction of the metal, the deformation of the plastic dial head will also occur, which will also cause the switch to be damaged. The last one looks very good, that is, the switch's dial is made of bakelite, and the support is made of metal, such as bras...

AI Technical Summary

Problems solved by technology

[0002] At present, there are the following types of electric switch toggle assemblies on the market. The most common one is a plastic support in the inner hole of the plastic toggle. Due to the limited high temperature resistance of plastic, when the silver contact contacts heat, Especially when the silver contact surface is oxidized to produce continuous ignition, the plastic support will be deformed, resulting in damage to the switch

There is also a metal support in the inner hole of the plastic toggle. Due to the heat conduction of the metal, the deformation of the head of the plastic toggle will also occur, which will also cause damage to the switch.

The last one looks good, that is, the toggle head of the switch is made of bakelite, and the support head is made of metal, such as brass. Due to the difference between the two materials, long-term use will make the brass support head wear and become thinner or thinner. The wear of the bakelite inner hole becomes larger. When the wear reaches a certain level, it cannot function normally on the switch springboard, and the switch is also damaged.

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