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What is an auto reset push button switch?

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An auto-reset pushbutton switch is an auto-reset switch that includes a bottom case and a button.

Contact feet and bracket feet are fixed on the bottom case, the static contact is fixed on the contact feet, and the end of the metal elastic rocker is fixed with a moving contact corresponding to the static contact, and the bracket foot is used as a supporting point ;

The steel ball at the bottom of the spring seat under the button is pressed against the metal elastic rocker, so that the metal elastic rocker rotates around the support point, so that the dynamic and static contacts are opened and closed. The rocking end of the metal elastic rocker is equipped with a reset bracket. A reset mechanism composed of a reset spring.

The top of the reset spring is in contact with the inner wall of the button, forming a second-gear unilateral automatic reset, third-gear unilateral reset or third-gear bilateral automatic reset switch.

From the button reset method, there are unilateral reset, bilateral reset, multilateral reset and vertical reset.

Extended Information: Structural Principles

The push button switch generally adopts a water accumulation structure, which is composed of a button cap, a return spring, a static contact, a moving contact and a shell, etc. It is usually made into a composite type, with a pair of normally closed contacts and a normally open contact. Some products The number of contact pairs can be increased by connecting multiple elements in series. There is also a self-contained button that automatically maintains the closed position when pressed, and can only be opened when power is removed.

When the button is not pressed, the moving contact and the static contact above are connected, and this pair of contacts is called a normally closed contact. At this time, the moving contact is disconnected from the static contact below, and this pair of contacts is called a normally open contact: when the button is pressed, the normally closed contact is disconnected, and the normally open contact is closed; when the button is released, the The original working state is restored under the action of the return spring.

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