JPS6134772Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to an audio device that can be used when adding a time-sounding function or an alarm function using voice synthesis to a television receiver, and the main power switch can be turned on while the earphones are connected. It is an object of the present invention to provide a device that can make sub-audio such as sub-audio such as time audio and wake-up audio be emitted from a speaker even when disconnected.

Recently, speech synthesis technologies such as the speech segment synthesis method and the Percoll method have been put into practical use, which compress audio signals and store them in a storage element ROM, read them out as appropriate in response to instructions from the outside, and combine them to synthesize and generate speech. It is being considered that this can be combined with a timer to generate a sound indicating the time or a sound for an alarm. However, when trying to make such secondary sounds emitted from a television receiver, etc., the alarm sound may be emitted even when the power switch of the television receiver, etc. is turned off or when earphones are connected. etc. need to be clearly uttered from the speaker.

In view of this, it is an object of the present invention to provide a device that can reliably and clearly emit sub-audio from a speaker even when the power switch is turned off or earphones are connected. Hereinafter, the present invention will be described in detail with reference to the drawings showing one embodiment thereof. This embodiment is for the case where a receiver such as a television receiver is equipped with sub-audio means for emitting the time and alarm.

First, in the figure, reference numeral 1 is a circuit consisting of a tire and a voice synthesis circuit that are added to the television receiver as a sub-sound generation circuit, and are switched by an external switch (not shown), and are switched from time to time. A time audio signal for notifying the time, for example, every 30 minutes, and a wake-up audio signal for emitting a wake-up sound are generated as sub-audio signals. 2
is a sub-amplification circuit that amplifies the sub-audio signal.

On the other hand, 3 is a receiving circuit of a television receiver or the like as a main audio generating circuit, which receives a television broadcast or the like and generates the received audio signal as a main audio signal. 4 is a main amplification circuit that amplifies both the main audio signal and the sub-audio signal. These main audio generation circuit 3 and main amplifier circuit 4 are connected to the main power supply circuit 5
The sub audio generation circuit 1 and the sub amplifier circuit 2 are powered by the sub power supply circuit 7, and are operated only when the power switch 6 is turned on. I keep it running all the time regardless.

The main audio signal A output from the main amplifier circuit 4 is taken out to an earphone jack 9 via an earphone transformer 8, and is supplied to an earphone 11 via an earphone plug 10 which is detachably attached to the earphone jack 9.
The main and sub audio signals A and B of the output are
The other end of the power supply is supplied to a speaker 13 via a switch 12 which is linked to the power switch 6, and is either connected to a switch 15 which is switched depending on whether the earphone 11 is attached or detached, or to ground, via a switch 14 which is also linked to the power switch 6.

With this configuration, when the power switch 6 is currently turned on and is in the receiving state, the switches 12 and 14 are switched to the A side. Therefore, both the received audio signal, which is the main audio signal, and the time audio signal and alarm audio signal, which are the auxiliary audio signals, are amplified by the main audio amplification circuit 4 and supplied to the path of the switch 12, the speaker 13, and the switch 14.
At this time, if the earphone plug 10 is not connected to the earphone jack 9, the switch 15 is closed, and both the main sound and the sub-sound are emitted from the speaker 13. If the earphone plug 10 is connected, the switch 15 is opened, so no sound is emitted from the speaker 13, and both the main audio and sub audio are emitted from the earphone 11 via the earphone transformer 8, earphone jack 9, and earphone plug 10. Ru. The above is for normal usage.

Next, a description will be given of the alarm clock operation when the power switch 6 is turned off and the television receiver is placed in a non-operating state. In this case, when the power switch 6 of the television receiver is turned off, the operations of the main audio generating circuit 3 and the main amplifier circuit 4 are stopped, and the switches 12 and 14 are switched to the B side. Furthermore, the sub-audio generating circuit 1 and the sub-amplifying circuit 2 continue to operate even when the power switch 6 is turned off.

Therefore, at this time, the earphone plug 10
is connected to the earphone jack 9 or not, the switch 12,
A sub-audio signal is always supplied to the speaker 13 via the speaker 14, and the speaker 13 emits a wake-up sound. Therefore, even if you wake up the night before with the earphones 11 connected, as long as the power switch 6 is turned off, the wake-up sound will be emitted loudly from the speaker 13 at the predetermined time, and an easy-to-understand and reliable wake-up effect will be achieved. It is something that

As described above, according to the device of the present invention, when the main power switch is turned off, the first switch connects the sub-amplifier circuit and the speaker, and the second switch connects the other end of the speaker to the ground. By doing so, even if the main power switch is disconnected and the earphones are connected, only the sub-audio for time and alarm can be reliably emitted from the speaker.

Although the above explanation has been made regarding an embodiment in which a timer is added to a television receiver, etc., the present invention can be widely applied to any other audio equipment such as a stereo receiver or a radio receiver. Needless to say.

[Brief explanation of the drawing]

The figure is a circuit diagram of an audio device according to an embodiment of the present invention. 1...Sub audio generation circuit, 2...Sub amplifier circuit, 3
...Main audio generation circuit, 4...Main amplifier circuit, 5...
Main power circuit, 6... Power switch, 7... Sub power circuit, 8... Earphone transformer, 9... Earphone jack, 10... Earphone plug, 11
...Earphone, 12...Switch, 13...Speaker, 14...Switch, 15...Switch.

Claims (1)

[Scope of utility model registration request] a sub-audio generation circuit that generates a sub-audio signal such as a synthesized audio signal; a sub-amplification circuit that amplifies only the sub-audio signal; a main audio generation circuit that generates a main audio signal such as a received audio signal; It is equipped with a main amplification circuit that amplifies both the signal and the sub-audio signal, a speaker for vocalization, and a removable earphone. The main audio generating circuit and the main amplifying circuit are made to operate at all times, and the main audio generating circuit and the main amplifying circuit are made to operate according to the on/off state of the main power switch, and the jack to which the plug of the earphone is attached/removed is connected to the output terminal of the main amplifying circuit. When the main power switch is turned on, the output of the main amplifier circuit is supplied to the speaker between each output terminal of the main amplifier circuit and the sub amplifier circuit and one end of the speaker. A first switch is provided that switches to supply the output of the sub-amplifier circuit to the speaker when the power switch is turned off, and a first switch is provided at the other end of the speaker that supplies the output of the sub-amplifier circuit to the speaker when the main power switch is turned on. The other end of the speaker is connected to a third switch that is switched when the earphone is attached or removed, and a second switch is provided that switches to ground the other end of the speaker when the main power switch is disconnected. sound equipment.