Patent ID: 7502282

Claim:
A digital audio signal player, comprising: a reproducing unit to pick a disc audio signal; an operation unit including a contact member, and a rotation member, wherein the contact member is movable relative to the rotation member elastically, and the contact member is rotated in concert with the rotation member when the contact member is pressed; a sensor for detecting a rotation state of the operation unit and producing a corresponding detected signal; a trigger switch for generating a trigger signal when the contact member contacts the trigger switch; a memory for storing the disc audio signal picked by the reproducing unit; a digital signal processor for controlling input and output of the disc audio signal of the memory; a system processing unit for receiving and processing the detected signal of the sensor and the trigger signal of the trigger switch; wherein the trigger switch is a thin layer switch and includes a flexible upper surface layer, an upper conducting layer mounted on a bottom of the upper surface layer, a flexible lower surface layer spaced from the upper surface layer, a lower conducting layer mounted on a top of the lower surface layer, an insulating fluid layer located between the upper conducting layer and the lower conducting layer to provide an insulating effect, and an insulating glue located between the upper conducting layer and the lower conducting layer to encompass the insulating fluid layer.