Optical switch button

Abstract

The invention discloses an optical switch button. The button contains a deformable housing, a movable shaft arranged in the housing, an elastic part arranged in the housing and equipped with a circuitboard, a light emitter and a switch button of a light receiver. The movable shaft is selectively disposed at the non-pressed position and the pressed position. The light emitter emits a light signal.The light signal reaches the light receiver along a light transmission path. When the movable shaft is at the non-pressed position, a deformable part and the light transmission path are in the firstspace relationship. The light signal received by the light emitter is first strength. When the movable shaft moves to the pressed position from the non-pressed position by press pressure, the movableshaft compresses an elastic part and pushes against the deformable part to move. Therefore, the light signal received by the light receiver is second intensity different from the first intensity. As aresult, the switch button is trigged to generate a trigger signal. The button can quickly and precisely convert press 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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