초록 ▼

A switch and an actuator therefore are arranged, respectively, on the portable radio unit and the carrying holder therefore in a manner such that, when the radio unit is inserted in the carrying holder, the switch is actuated to disconnect the microphone-speaker built in the radio unit or left intac

A switch and an actuator therefore are arranged, respectively, on the portable radio unit and the carrying holder therefore in a manner such that, when the radio unit is inserted in the carrying holder, the switch is actuated to disconnect the microphone-speaker built in the radio unit or left intact, depending upon whether the radio unit is inserted with its grilled face directed backward or forward. With such arrangement, any unwanted increase in power consumption of the speaker circuit of the receiver or noise intrusion to the microphone circuit of the transmitter can be avoided even when an external microphone-speaker is connected to the radio unit. The built-in microphone-speaker can be used even in cases where the radio is carried on a person as at his waist.

대표청구항 ▼

A combination of a portable radio unit and a carrying holder for said portable radio unit, said portable radio unit having a grilled front face, first speaker means mounted so that audible sound from said first speaker means is radiated through said grilled front face, speaker circuit means for supp

A combination of a portable radio unit and a carrying holder for said portable radio unit, said portable radio unit having a grilled front face, first speaker means mounted so that audible sound from said first speaker means is radiated through said grilled front face, speaker circuit means for supplying said first speaker means with an audible sound signal, and first switch means for connecting and disconnecting said first speaker means to and from said speaker circuit means, said carrying holder having a switch member mounted thereon for activating said first switch means, wherein said first switch means and said switch member are respectively arranged, on said portable radio unit and said carrying holder in positions which are such that said first switch means is operated only when said portable radio unit is inserted into said carrying holder with said grilled front face oriented to be covered by said carrying holder, said first switch means being unoperated when said portable radio unit is inserted into said carrying holder with said grilled front face directed to be visible from outside.