JPS6150426A - Function switching device of audio equipment - Google Patents

Abstract

PURPOSE:To improve remarkably the operability by obtaining desired function through a single operation and executing the changeover from any of at least two functions into other function through the single operation. CONSTITUTION:When a cassette half is loaded to a tape deck 7 at first, a loading detection switch 21 supplies the 1st operation command signal to a tape power supply 24, a power voltage is fed to the tape deck 7 to attain tape reproducing state. In operating an eject key, an eject detection tuner 22 applies the 1st stop command signal to a tape power supply 24 to stop the tape deck 7. In operating the tuner switch 23 next, a power upply command is fed to the tuner power supply 25, an FM tuner section 9 becomes in the FM broadcast reception state. In operating the AM switch 4 to the FM broadcast reception state, an AM reception command signal is fed to the tuner power supply 25 from a control circuit 10 to stop the supply of the power voltage to the FM tuner 9 and the power is fed to the AM tuner 8 to attain the AM broadcast reception state.

Description

DETAILED DESCRIPTION OF THE INVENTION Technical Field The present invention relates to a function switching device a for an audio device that includes a plurality of functions.

FIG. 1 shows a conventional example of a function switching device for an audio device that can obtain a tape playback state and an AM and FM broadcast reception state as a plurality of functions. In this figure, the keyboard 1 includes a power switch 2 that controls the power supply to the audio device, a tape switch 3 that commands tape playback, an AM switch 4 that commands the reception of AM broadcasting, and an FM switch that commands the reception of FM broadcasting. 5 is provided. A power supply section 6 is connected to the power switch 2,
Depending on the operation of the power switch 2, power supply voltage is supplied from the power supply section 6 to the cassette tape deck section 7, AM tuner section 8, and FM tuner section 9, or the supply of power supply voltage is stopped.

Tape switch 3, AM switch 4 and FM switch 5
constitutes a function changeover switch, and is connected to a control circuit 10 that controls the operations of the tape deck section 7, AM tuner section 8, and FM tuner 9. The control circuit 10 is composed of, for example, a microcomputer. Further, an output switching circuit 11 is connected to each audio signal output terminal of the tape deck section 7, AM tuner section 8, and FM tuner section 9, and the output switching circuit 11 switches the tape deck section 7, ' The audio output of either the AM channel 8 or the FM channel 9 is supplied to the amplifier 12 .

Note that the power supply voltage is already supplied to the power supply unit 6 and the control circuit 10 before power is supplied to the tape deck unit 7 etc. by operating the power switch 2, and in the case of an in-vehicle audio device, the power supply voltage is already supplied to the power supply unit 6 and the control circuit 10. Power supply voltage is supplied when the switch is turned on.

In the case of tape playback, when the power switch 2 is operated, a cassette half is loaded in a predetermined playback position, and the tape switch 3 is operated, the control circuit 10 causes the tape deck section 7 to start the playback operation and output from the tape deck section 7. The output audio signal is sent to the amplifier 1 via the output switching circuit 11.
2. In addition, in the case of AM broadcast reception, when the AM switch 4 is operated after operating the power switch 2, the AM tuner section 8 starts receiving operation by the control circuit "10, and the audio signal output from the AM tuner section 8 is output switched. The signal is supplied to an amplifier 12 via a circuit 11. FM broadcast reception is performed in the same manner as AM broadcast reception.

However, in such conventional function switching equipment, the function selection operation cannot be performed until the power supply voltage is supplied to the tape deck section, tuner section, etc. by operating the power switch. The problem was that it was not good.

1 rim An object of the present invention is to provide a function switching device with improved operability.

The function switching device of the present invention generates a first operation command signal when instructing the first signal generating means to start operating, and generates a first stop command signal when instructing the first signal light generating means to stop operating. a second command means that generates a second operation command signal when commanding the second signal generating means to start operating, and generates a second stop command signal when commanding the second signal generating means to stop operating; , @11 to the signal generating means in order to avoid operating the first signal generating means in response to the first operation command signal! a second signal generating means for supplying the source voltage, stopping supplying the 'rim voltage to the first signal generating means in response to the first stop command signal, and operating the second signal generating means in response to the second operation command signal;
power supply means for supplying the ffi source voltage to the signal generation means and stopping the supply of power supply voltage to the second signal generation means in response to the second stop command signal, the cough power supply means to the first signal generation means; The power supply voltage supply to the first signal generating means is stopped in response to the second operation command signal while the power supply voltage is being supplied to the second signal generating means, and the power supply voltage is stopped in response to the first operation command signal while the power supply voltage is being supplied to the second signal generating means. The present invention is characterized in that the supply of power supply voltage to the second signal generating means is stopped.

Embodiments Hereinafter, embodiments of the present invention will be described with reference to FIGS. 2 to 7.

In FIG. 2, the same parts as in FIG. 1 are indicated by the same reference numerals.
A loading detection switch 21 that detects that a cassette half is loaded and turns on when loading is detected, and an ejector that turns on in conjunction with an eject key (not shown) for ejecting the cassette half from a predetermined position in the storage chamber to the outside. A detection switch 22 is provided. Also, AM tuner section 8 or F
A tuner switch 23 that instructs the M tuner section 9 to supply and stop power supply is provided on the keyboard 1 along with the tape switch 3, AM switch 4, and FM switch 5.

8 filling detection switch 21 and eject detection switch 22
A tape power supply section 24 is connected to the tape deck section 7 , and the tape power supply section 24 is connected to the tape deck section 7 when the loading detection switch 21 is turned on.
When the eject detection switch 22 is turned on, the supply of power voltage to the tape deck section 7 is stopped. The tape power supply section 24 is also connected to the control circuit 10,
The N11i voltage supply operation state of the tape power supply section 24 is transmitted to the control circuit 10 through a first operation state signal, and the control circuit 10 also controls the power supply voltage supply operation of the tape power supply section 24. on the other hand,.

A tuner power supply section 25 is connected to the tuner switch 23, and the chip power supply section 25 supplies power to either the AM tuner section 8 or the FM tuner section 9 according to the power supply command output from the tuner switch 23. supply the power supply voltage,
The supply of power supply voltage to the AM tuner section 8 or the FM tape deck section 9 is stopped in response to the power supply stop command. The tuner power supply section 25 is also connected to the control circuit 10, and the power supply voltage supply operation state of the tuner power supply section 25 is transmitted to the control circuit 10 as a second operation state signal, and the control circuit 10 is also connected to the control circuit 10.
The power supply voltage supply operating state of the tuner power supply section 25 is also controlled by the following. Further, each output end of the tape deck section 7, AM tuner section 8, and FM tuner section 9 is commonly connected to an amplifier 12. In addition, in the power supply command by operating the tuner switch 23, the power supply voltage is preferentially supplied to either the AM tuner section 8 or the FM tuner section 9, and here, it is assumed that the FM tuner section 9 is given priority.

Next, the function according to the present invention having such a configuration>'J
J! ! k HIII+7)IIJ '/r ”iJ
R31! l 'J &'I-'l', 68 Q)
70-1 Explain according to figure 70-1.

First, when a cassette half is loaded into a predetermined position in the cassette half storage chamber of the tape deck section 7, the loading detection switch 21 is turned on, and this on is supplied to the tape power supply section 24 as a first operation command signal. The tape power supply section 24 supplies a power supply voltage to the tape deck section 7 in response to the first operation command signal.

The operating state of the tape power supply unit 24 is transmitted to the control circuit 10 by a first operating state signal, and the control circuit 10 stores a tape-on signal indicating that a cassette half is loaded in an internal memory based on the content of the first operating state signal. Record 4Xn-yru. When the tape deck section 7 is supplied with the power supply voltage, it enters a tape playback state and supplies a playback audio A signal to the amplifier 12.

If you operate the eject key in such a tape playback state,
The cassette half is ejected from the storage chamber to the outside at the same time that the adjustment detection circuit 22 is turned on. When the eject detection tuner 22 is turned on, a first stop command signal is supplied to the tape power supply section 24, and the tape power supply section 24 stops supplying the power supply voltage to the tape deck section 7. At this time, the control circuit 10 detects that the cassette half has been ejected in accordance with the first operating state, and the storage of the tape-on signal in the internal memory is erased.

Next, when the tuner switch 23 is operated, a power supply command is supplied from the tuner switch 23 to the tuner power supply unit 25, so that the tuner power supply unit 25 outputs a power supply command to the FM tuner unit 9.
The power supply voltage is supplied to the FM11t, and the FM11t enters the transmitting/receiving state.

The operating state of the tuner power supply unit 25 is transmitted to the control circuit 10 by a second operating state signal. Based on the content of the second operating state signal, the control circuit 10 stores a tuner-on signal in the internal memory, indicating that the tuner power supply section 25 has activated the power supply by operating the tuner switch 23.

When the AM switch 4 is operated to enter the FM broadcast reception state, an AM reception command signal is supplied from the control circuit 10 to the tuner power supply section 25. The tuner power supply section 25 stops supplying power supply voltage to the FM tuner section 9 and supplies power supply voltage to the AM chicope section 8 in response to the AM reception command signal. Therefore, F.M.
Broadcast reception stops and AM broadcast reception status is established.

Also, if you operate the FM switch 5 to receive AM broadcasting,
An FM reception command signal is sent from the control circuit 10 to the tuner power supply unit 2.
5. The tuner power supply unit 25 stops supplying power supply voltage to the AM tuner unit 8 and supplies power supply voltage to the FM tuner unit 9 in response to the FM reception command signal. Therefore,
AM broadcast reception is stopped and FM broadcast reception status is entered.

Tuner switch 2 to receive AM or FM broadcast.
3, a first stop command signal is supplied from the tuner switch 23 to the tuner power supply unit 25, the tuner power supply unit 25 stops supplying the power supply voltage to the tuner unit 8 or 9, and the content of the second operating state signal is is reversed. Therefore, the broadcast reception state stops and the memory of the tuner-on signal disappears from the internal memory of the control circuit 10.

Furthermore, when a cassette half is loaded into a predetermined position in the cassette half storage chamber of the tape deck section 7 while an AM broadcast or FM broadcast is being received, the loading detection switch 21 is turned on and the first stop command signal is generated. A power supply voltage is supplied from the power supply section 24 to the tape deck section 7. When the control circuit 10 detects the start of power supply to the tape power supply unit 2/1 from the content of the first operating state signal, it stores the tape-on signal in the internal memory. Furthermore, since the tuner-on signal has already been stored, a second stop command signal is supplied to the power supply unit 25. The tuner power supply section 25 stops supplying power to the AM tuner section 8 or the FM tuner section 9 in response to the second stop command signal. Therefore, FM broadcast reception is stopped and the tape is played back. Further, the internal memory of the control circuit 10 stores a tape-on signal and a tuner-on signal.

When the tuner switch 23 is operated in such a tape playback state, a second stop command signal is supplied from the tuner switch 23 to the tuner power supply unit 25, and the supply of this stop command signal is transmitted to the control circuit 10 by the second operating state signal, and the tuner switch 23 is operated. The memory of the on signal is erased from internal memory. The tape playback state continues.

When the eject key is operated to enter the tape playback state in which the tape on signal and tuner on signal are stored, the eject detection switch 22 is turned on and the cassette half is ejected from the storage chamber to the outside, so that the tape deck section 7 is moved from the tape power supply section 24 to the tape deck section 7. The power voltage supply to the unit stops. At this time, the storage of the tape-on signal disappears from the internal memory of the control circuit 10 in accordance with the content of the first operating state signal, leaving only the tuner-on signal. Therefore, the control circuit 10 supplies the second operation command signal to the tuner power supply section 25, and the tuner power supply section 2
5 G; & Tuner section 8 or 9 immediately before the power supply voltage supply is stopped
Re-supply power to the unit. Therefore, the state becomes an AM or FM broadcast reception state.

On the other hand, when the tuner switch 23 is operated to enter a tape playback state in which only the tape-on signal is stored in the internal memory of the control circuit 10, the power supply voltage is transferred from the tuner power supply section 25 to the FM tuner section 9 in response to the second operation command signal. is supplied. When the control circuit 10 detects from the content of the second operating state signal that the tube power supply unit 25 has activated the power supply by operating the tuner switch 23, it stores the tuner-on signal in the internal memory and also stores the tape-on signal in the internal memory. Therefore, a first stop command signal is supplied to the tape power supply section 24. The tape power supply section 24 stops supplying the power supply voltage to the tape deck section 7 in response to the first stop command signal. Therefore, F
The M tuner section 9 is activated to enter the FM broadcast reception state, and tape playback is stopped. At this time, as shown in FIG. 7, the hub hole 31a of the cassette half 31 is connected to the hub shaft 32.
In other words, the cassette is loaded in the cassette storage chamber. Further, by stopping the power supply to the tape deck section 7, the hub shaft 32 and the pinch roller 33 stop rotating, and the pinch roller 33 and the magnetic head 34 move together with the support plate 35 from the cassette half 31 in the direction of the arrow A to the position of the broken line B. and separate it from the cassette tape. Such a deep playback stop j1- state is called a deep release state.

In the tape reproducing state, the pinch roller 33 and the magnetic head 34 are driven together with the support plate 35 by a plunger solenoid (not shown) and come into close contact with the tape in the cassette half 31.

Next, when the AM switch 4 is operated to enter the FM broadcast reception state when the tape deck unit 7 is in the tape release state, FMM transmission and reception is stopped by the same operation as when the tape deck unit 7 is not in the tape release state, and the AM fault transmission and reception state is established.
The deep release state continues. Also, when the FM switch 5 is operated in the AMM transmission/reception state when the tape deck section 7 is in the tape release state, the FM broadcast reception state is entered by the same operation as when the tape deck section 7 is in the tape release state.

Further, when the tuner switch 23 is operated while the tape deck section 7 is in the tape release state, a second stop command signal is generated, so that the supply of power supply voltage from the tuner power supply section 25 to the AM or FM tuner section 8.9 is stopped. Zuru. The internal memory of the control circuit 10 erases the memory of the tuner-on signal in accordance with the content of the second operating state signal, and only the tape-on signal remains, so the M1 operation command signal is supplied to the tape power supply unit 24. Therefore, the tape power supply section 24 supplies the power supply voltage to the tape deck section, so that the tape deck section 7 returns from the tape release state to the tape playback state.

Further, when the tape deck section 7 is in the tape release state and the tape switch 3 is operated, the control circuit 10 supplies a first stop command signal to the tape power supply section 24 and a second stop command signal to the tuner power supply section. 25. Therefore, the tape power supply section 24 supplies power supply voltage to the tape deck section 7, and the channel power supply section 25 stops supplying power supply voltage to the channel section 8 or 9, so that the function changes from the broadcast reception state to the tape playback state. Switch to .

When AM switch 4 is operated in such a tape playback state,
The control circuit 10 supplies the AM reception command signal accompanied by the second operation command signal to the tuner power supply section 25 and also supplies the first stop command signal to the tape power supply section 24, so that the tuner power supply section 25 supplies power to the AM tuner section 8. After supplying the voltage, the tape power supply section 24 stops supplying the power supply voltage to the tape deck section 7.

Therefore, the function is in the AMM transmission/reception state, and the mode of the tape deck section 7 is in the tape release state.

Further, when the FM switch 5 is operated instead of the AM switch 4, an FMM transmission command signal accompanied by a second operation command signal is generated, and an FM broadcast reception state is entered.

When the eject key is operated in the AM or FM broadcast reception state and in the tape release state, the cassette half is ejected and the eject detection switch 22 is turned on.
A first stop command signal is generated. The generation of the first stop command signal is transmitted to the control circuit 10 by a first operating state signal;
The memory of the tape-on signal is erased. Since only the tuner-on signal remains in memory, the broadcast reception state continues.

In the above-mentioned actual MPA of the present invention, the loading detection switch 21 and the ejecting detection switch 22 are connected to the tape power supply section 24, and the tuner switch 23 is connected to the tuner power supply section 25. power supply section 24. ．． Although the Ti power supply operation of No. 25 is directly controlled, the invention is not limited thereto. For example, as shown in FIG. 8, by connecting the loading detection switch 21, the ejecting detection switch 22, and the tuner switch 23 to the control circuit 10, the control circuit 1o can control the power supply of the power supply section 24, 25 according to the operating state of these switches. The supply operation may also be controlled.

Further, in the above embodiment, a case was explained in which a tape deck was used, but a digital audio disc player or the like may also be used.

Class 1" (Thus, according to the function switching device of the present invention, a desired function can be obtained with a single operation, and switching from one of at least two functions to the other function can also be performed with a single operation. can be done,
This significantly improves operability. Further, the function switching device of the present invention is extremely suitable for switching functions of an in-vehicle A-dio device.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing a conventional function switching '4A@, FIG. 2 is a block diagram showing an embodiment of the present invention, and FIGS. 3 to 6 are flow diagrams showing the operation of the device shown in FIG. FIG. 7 shows a tape release state, and FIG. 8 is a block diagram showing another embodiment of the present invention. Explanation of symbols of main parts 1... Keyboard 2... Power switch 3... Tape switch 4... AM switch 5... FM switch 7... Tape deck section 8... AM tuner section 9... FM tuner section 10... Control circuit 21... Loading detection switch 22. ...Eject detection switch 23...
...Tuner switch 24...Tape power supply section

Claims (1)

[Claims] A function switching device for an audio device for selectively operating at least one of first and second signal generating means, wherein when instructing the start of operation of the first signal generating means, a first operation command signal is sent. The first
a first command means that generates a first stop command signal when instructing the signal generating means to stop operating; and a second command means that generates a second operation command signal when commanding the second signal generating means to start operating; a second command means for generating a second stop command signal when instructing to stop the operation of the means; and a power supply voltage applied to the first signal generating means to operate the first signal generating means in response to the first operation command signal. the second signal to stop the power supply voltage supply to the first signal generating means in response to the first stop command signal and to operate the second signal generating means in response to the second operation command signal. power supply means for supplying power supply voltage to the generation means and stopping the supply of power supply voltage to the second signal generation means in response to the second stop command signal; Stopping the power supply voltage supply to the first signal generation means in response to the second operation command signal while the power supply voltage is being supplied, and in response to the first operation command signal while the power supply voltage is being supplied to the second signal generation means. A function switching device characterized in that the power supply voltage supply to the second signal generating means is stopped when the second signal generating means is stopped.