| 摘要 |
A microphone includes a housing, a plurality of terminals, and a variable resistance switch. The switch includes a resistance member having opposite first and second ends connected to respective ones of the terminals. A conductive member has one end connected to a respective one of the terminals. A slide member includes a wiper that is simultaneously and constantly in sliding contact with the resistance member and the conductive member so as to complete a circuit through the terminals, the conductive member, and the resistance member. The wiper is slidable over the conductive member and the resistance member so as to linearly vary the resistance in the circuit.
|
