| 摘要 |
<p>PURPOSE:To offer a remote control device capable of using a head phone with a remote control and the head phone without the remote control. CONSTITUTION:This device is constituted so that switching is operated by detecting the voltage change of a control signal input terminal 25 and simultaneously when the plug of the head phone without the remote control is inserted to a head phone jack 41, the relevant control signal input terminal 25 is grounded by conducting a switching transistor 47 and when the relevant control signal input terminal 25 is grounded, no switching is operated by a control circuit 1.</p> |
