JPS59195896U

JPS59195896U - Internal/outside speaker switching device for audio equipment

Info

Publication number: JPS59195896U
Application number: JP8893683U
Authority: JP
Inventors: 幸弘森山
Original assignee: 株式会社富士通ゼネラル
Priority date: 1983-06-10
Filing date: 1983-06-10
Publication date: 1984-12-26
Also published as: JPH0422632Y2

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) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Brief explanation of drawings]

第１図は従来例を示すブロック図、第２図は他の従来例
を示すブロック図、第３図はさらに他の従来例を示すブ
ロック図。第４図は本考案による音響機器の内外スピー
カ切換装置の一実施例を示すブロック図である。２３・・・アンテナ、２４・・・高周波回路、２５・・
・復調回路、２６・・・前置増幅回路、２７・・・内部
用の音声増幅回路、２８・・・外部用の音声増幅回路、
２９・・・内部スピーカ、３０・・・レセプタクル、３
１・・・プラグ、３２・・・外部スピーカ、３４・・・
ミューティング信号出力回路、３６・・・反転回路、３
７・・・コネクタ。FIG. 1 is a block diagram showing a conventional example, FIG. 2 is a block diagram showing another conventional example, and FIG. 3 is a block diagram showing still another conventional example. FIG. 4 is a block diagram showing an embodiment of the internal/external speaker switching device for audio equipment according to the present invention. 23... Antenna, 24... High frequency circuit, 25...
- Demodulation circuit, 26... Preamplifier circuit, 27... Internal audio amplification circuit, 28... External audio amplification circuit,
29... Internal speaker, 30... Receptacle, 3
1...Plug, 32...External speaker, 34...
Muting signal output circuit, 36...inversion circuit, 3
7... Connector.

Claims

[Scope of utility model registration request]

(1) An internal audio amplification circuit and an external audio amplification circuit equipped with a muting function, an internal speaker connected to the output side of the internal audio amplification circuit, and an external audio amplification circuit. An external speaker connected via a connector consisting of a receptacle and a plug that does not have a switching contact on the output side, an inverting circuit whose output side is connected to a muting terminal of the internal audio amplification circuit, and the inverting circuit. It is equipped with a muting signal output circuit connected to the input side and the muting terminal of the external audio amplification circuit, and by connecting a receptacle and a plug to the connector, the output of the muting signal output circuit is What is claimed is: 1. An internal/outside speaker switching device for audio equipment, characterized in that a contact portion is provided for inverting the internal and external speakers of an audio device.

(2) Utility Model Registration Scope of Claim 1 In the audio equipment described in claim 1, the audio equipment is a radio device, and the internal and external audio amplification circuits are two separate circuits connected after the demodulation circuit of the radio device. An internal/external speaker switching device for audio equipment that serves as an audio amplification circuit.