JPS6381590U

JPS6381590U -

Info

Publication number: JPS6381590U
Application number: JP17572486U
Authority: JP
Priority date: 1986-11-14
Filing date: 1986-11-14
Publication date: 1988-05-28

Description

[Brief explanation of the drawing]

第１図は本考案の音場拡大回路の一実施例、第
２図は本考案に使用される外部スピーカーの接続
関係を示す図面、第３図はラジオ付テープレコー
ダーの斜視図である。主な図番の説明７……左チヤンネル用第１スピ
ーカー、８……左チヤンネル用第２スピーカー、
９……右チヤンネル用第１スピーカー、１０……
右チヤンネル用第２スピーカー、１１……第１ジ
ヤツク、１２……第２ジヤツク、１３……第１プ
ラグ、１４……第２プラグ、１５……左チヤンネ
ル用外部スピーカー、１９……右チヤンネル用外
部スピーカー、２３……左チヤンネル用増幅回路
、２４……右チヤンネル用増幅回路、２５……第
１スイツチ、２６……第２スイツチ、２７……第
１コンデンサー、２８……第２コンデンサー、３
３……第１切換スイツチ、３４……第２切換スイ
ツチ。 FIG. 1 is an embodiment of the sound field expansion circuit of the present invention, FIG. 2 is a drawing showing the connection relationship of external speakers used in the present invention, and FIG. 3 is a perspective view of a tape recorder with a radio. Description of main drawing numbers 7... 1st speaker for left channel, 8... 2nd speaker for left channel,
9...First speaker for right channel, 10...
2nd speaker for right channel, 11 ...1st jack, 12 ...2nd jack, 13...1st plug, 14...2nd plug, 15...external speaker for left channel, 19...for right channel External speaker, 23...Amplification circuit for left channel, 24...Amplification circuit for right channel, 25...First switch, 26...Second switch, 27...First capacitor, 28...Second capacitor, 3
3...First changeover switch, 34...Second changeover switch.

Claims

[Scope of utility model registration request]

In a stereo audio device equipped with a left channel speaker and a right channel speaker to which left and right channel signals are applied and respectively emit the signals, the left channel signal is amplified and the left channel signal is connected to the output terminal. The amplification circuit for the left channel to which the + terminal of the speaker for the right channel is connected, and the amplifier circuit for the left channel that amplifies the signal of the right channel and connects the + terminal of the speaker for the right channel to the output terminal.
The terminal is connected to the right channel amplifier circuit, and the first terminal is switched in conjunction with the sound field expansion operation and is grounded through the common terminal and the first and second capacitors for cutting off low frequencies. and first and second switches having second terminals connected to each other, and a first terminal connected to the output terminal of the left channel amplifier circuit and to the + terminal of the left channel external speaker. and a first jack having a second terminal connected to a common terminal of the first switch and to which one terminal of the left channel external speaker is connected; and a first jack connected to the output terminal of the right channel amplifier circuit. and a second terminal connected to the common terminal of the second switch and to which one terminal of the external speaker for the right channel is connected. Consists of a second jack,
When the sound field expansion is not in operation, the left channel external speaker and the right channel external speaker connected to the first jack and the second jack are used as treble speakers, and when the sound field expansion is in operation, the left channel external speaker and the right channel external speaker are used as treble speakers. A sound field expansion circuit for a stereo acoustic device, characterized in that an external channel speaker is used as a sound field expansion speaker.