Optical switch button

Abstract

The invention discloses an optical switch button, which includes a housing with a deformable part, a movable shaft movably arranged in the housing, an elastic member arranged in the housing, and includes a circuit board, a light transmitter and a light receiver switch module. The active shaft can be selectively located at the unpressed position and the pressed position; the light emitter emits a light signal, and the light signal reaches the light receiver along the light transmission path; when the active shaft is at the unpressed position, the deformable part and the light transmission path With the first spatial relationship, the optical signal received by the optical receiver has the first intensity; when the active shaft moves from the unpressed position to the pressed position in response to the pressing force, the active shaft compresses the elastic member and pushes against the deformable part to move, so that the light The optical signal received by the receiver is of a second intensity different from the first intensity, so as to trigger the switch module to generate a trigger signal. The present invention can achieve rapid and precise conversion of pressing signals.

Description

technical field [0001] The invention relates to an optical switch key, in particular, the invention relates to an optical switch key which actuates a switch in response to a change in the receiving state of an optical signal due to a pressing action. Background technique [0002] Membrane switch keys and mechanical keys are commonly used key types in conventional keyboards. The main difference between the membrane switch button and the mechanical button is that the circuit structure that generates the signal is different. Generally speaking, a membrane switch button is a switch component that uses a thin film circuit layer as a signal generator. When the keycap is pressed to trigger the thin film circuit layer, the upper circuit layer is deformed so that the switch contacts of the upper circuit layer contact the corresponding switch contacts of the lower circuit layer. Then the membrane switch is turned on to generate a signal. However, the thin-film circuit layer is easil...

AI Technical Summary

Problems solved by technology

However, metal sheets and metal contacts are prone to wear and tear due to impact, which affects the service life of the buttons, and also causes metal sheets or metal contacts to rust due to moisture, resulting in poor conduction and affecting the stability of the buttons.

Furthermore, conventional mechanical buttons are generally not suitable for portable electronic devices that require high thinness, such as notebook computers, due to their complex structure and large volume.

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