JPS59144941U

JPS59144941U - sound equipment

Info

Publication number: JPS59144941U
Application number: JP4024283U
Authority: JP
Inventors: 福場　俊弘
Original assignee: 三洋電機株式会社
Priority date: 1983-03-18
Filing date: 1983-03-18
Publication date: 1984-09-27

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Brief explanation of drawings]

第１図は一般的な音響装置の１例のブロック図、第２図
はこの考案の音響装置の１実施例のブロック図、第３図
は第２図の動作説明用の等価回路図である。１・・・アンプ、２・・・スピーカ、３・・・主機器側
信号端子、４・・・入力切り換えスイッチ、５．　５’
・・・アンプ側ケーブル端子、６・・・信号ケーブル、
７・・・チューナ、８・・・接続機器側信号端子、９・
・・チューナ側ケーブル端子、１０・・・出力インピー
ダンス調整　−抵抗、１６・・・入力インピーダンス調
整抵抗、１８・・・スイッチ体、１９・・・限流抵抗、
２０・・・直流電源端子、２１・・・電圧検出回路、２
２・・・ラッチ回路、２５・・・入力表示部。Fig. 1 is a block diagram of an example of a general audio device, Fig. 2 is a block diagram of an embodiment of the audio device of this invention, and Fig. 3 is an equivalent circuit diagram for explaining the operation of Fig. 2. . 1...Amplifier, 2...Speaker, 3...Main device side signal terminal, 4...Input selection switch, 5. 5'
...Amplifier side cable terminal, 6...Signal cable,
7... Tuner, 8... Connected device side signal terminal, 9...
... Tuner side cable terminal, 10 ... Output impedance adjustment - resistance, 16 ... Input impedance adjustment resistance, 18 ... Switch body, 19 ... Current limiting resistor,
20... DC power supply terminal, 21... Voltage detection circuit, 2
2...Latch circuit, 25...Input display section.

Claims

[Scope of utility model registration request]

A main device and a plurality of connected devices are connected by each of a plurality of signal cables, and by selecting the main device, the connected device side signal terminal of the selected connected device is connected to the main device via the signal cable of the connected device. The audio device is connected to a signal terminal on the main equipment side of the device, and includes a switch body whose one end is connected to the signal terminal on the main equipment side and is closed only during the period of the selection operation, and a connection between the other end of the switch body and a DC power supply. an impedance element provided in between, and a pole ratio circuit connected to the other end of the switch body and detecting attachment/detachment of a signal cable of a selected connected device based on a change in the input DC voltage;
An audio device comprising a control circuit that controls a signal cable attachment and disconnection means based on a detection signal from the detection circuit.