JPS5848193U

JPS5848193U - Speaker switching device

Info

Publication number: JPS5848193U
Application number: JP14485881U
Authority: JP
Inventors: 三好　一秀; 信好立石
Original assignee: 富士通テン株式会社; トヨタ自動車株式会社
Priority date: 1981-09-28
Filing date: 1981-09-28
Publication date: 1983-03-31
Also published as: JPS626788Y2

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 the drawing]

第１図および第２図は先行技術をそれぞれ示す電気回路
図、第３図は本考案の一実施例のスピーカ切換え装置を
備えたカーステレオ装置を積載した自動車の簡略化した
平面図、第４図はスピーカ切換え装置２８の構成を示す
電気回路図である。　　　２２・・・音声信号出力機、
２３．２４．２５゜２６・・・スピーカ、２７・・・操
作スイッ゛チ、２８・・・スピーカ切換え装置、３１．
５５・・・位相反転回路、３１ａ、３１ｂ・・・出力端
、３８・・・リレー、３９・・・リレーコイル、４０．
４１，４２，６１，６２゜６３・・・リレースイッチ、
４７．　４９．　５８．−５９・・・増幅器。２４第２図第３図、−ラ　Ｖ−）ｑ−１−２−一よ−４≦とｍ−、ノＸ　　　　　２５１２６加　　　　、２１−1 and 2 are electric circuit diagrams showing the prior art, FIG. 3 is a simplified plan view of a car equipped with a car stereo device equipped with a speaker switching device according to an embodiment of the present invention, and FIG. The figure is an electrical circuit diagram showing the configuration of the speaker switching device 28. 22...Audio signal output device,
23.24.25゜26...Speaker, 27...Operation switch, 28...Speaker switching device, 31.
55... Phase inversion circuit, 31a, 31b... Output end, 38... Relay, 39... Relay coil, 40.
41,42,61,62゜63...relay switch,
47. 49. 58. -59...Amplifier. 24 Figure 2 Figure 3, -ra V-) q-1-2-1 yo-4≦ and m-, ノX 25126 addition, 21-

Claims

[Claim for Utility Model Registration] Speaker switching for switching between a state in which left and right audio signals from an audio signal output device are played by one speaker means on each side, and a state in which they are played by a pair of speaker means on each side. A pair of phase inversion circuits that invert the phases of the left and right audio signals and output them from a pair of output terminals, respectively;
One pair is provided for each left and right audio signal,
An amplifier, an operating switch, and a change in the switching mode of the operating switch, one of which is connected to one connection end of each one of the left and right speaker means, and the other of which is connected to one output end of each of the phase inverting circuits. A relay coil whose excitation state changes according to the excitation state of the relay coil, and a first and second relay coil whose switching mode changes according to the excitation state of the relay coil, and which are provided corresponding to the left and right audio signals respectively.
and a third relay switch, the first relay switch is a switch for switching the connection state between the pair of output terminals of the phase inverting circuit and the left amplifier, and the second relay switch is The third relay switch is a switch that switches the connection state of the other connection end of the one speaker means and the other amplifier, and the state of grounding the other connection end, and the third relay switch connects the other connection end of the other support speaker means. and a switch that turns on and off the other amplifier, and the other connection end of the other speaker means is grounded.