JPH0630451B2 - Function switching device for audio equipment - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a function switching device for an audio device having a plurality of functions.

BACKGROUND ART FIG. 1 shows a conventional example of a function switching device of an audio device capable of obtaining a tape reproducing state and an AM and FM broadcast receiving state as a plurality of functions. In the figure, a keyboard 1 includes a power switch 2 for controlling power supply of an audio device, a tape switch 3 for instructing tape reproduction, and an AM switch 4 for instructing reception of AM broadcast.
And an FM switch 5 for instructing reception of FM broadcast. A power source unit 6 is connected to the power source switch 2, and in response to an operation of the power source switch 2, the cassette tape deck unit 7, the AM tuner unit 8 and the FM tuner unit 9 are connected to the power source unit 6.
To the power supply voltage or the supply of the power supply voltage is stopped. The tape switch 3, the AM switch 4 and the FM switch 5 form a function changeover switch and are connected to a control circuit 10 which controls the operations of the tape deck section 7, the AM tuner section 8 and the FM tuner 9. The control circuit 10 comprises, for example, a microcomputer. An output switching circuit 11 is connected to each audio signal output terminal of the tape deck unit 7, the AM tuner unit 8 and the FM tuner unit 9, and the output switching circuit 11 is in accordance with the contents of the switching signal of the control circuit 10. The audio output from any one of the AM tuner unit 8, the AM tuner unit 8 and the FM tuner unit 9 is supplied to the amplifier 12. It should be noted that the power supply unit 6 and the control circuit 10 have already been supplied with the power supply voltage before the power supply to the tape deck unit 7 or the like by the operation of the power supply switch 2, and in the case of the in-vehicle audio device, the ACC (accessory of the vehicle) The power supply voltage is supplied in response to the switch being turned on.

In the case of tape reproduction, if the cassette half is loaded at a predetermined reproduction position after the power switch 2 is operated and then the tape switch 3 is operated, the tape deck section 7 starts the reproduction operation by the control circuit 10 and the tape deck section 7 is started. The audio signal output from the amplifier 1 via the output switching circuit 11
2 is supplied. Further, in the case of AM broadcast reception, when the AM switch 4 is operated after the power switch 2 is operated, the AM tuner unit 8 starts the receiving operation by the control circuit 10
The audio signal output from the M tuner unit 8 is supplied to the amplifier 12 via the output switching circuit 11. The FM broadcast reception is performed in the same manner as the AM broadcast reception.

However, in such a conventional function switching device, the function selection operation cannot be performed until the power supply voltage is supplied to the tape deck portion, the tuner portion, etc., and the operability is particularly high in the in-vehicle audio device. There was a problem that was not good.

SUMMARY OF THE INVENTION An object of the present invention is to provide a function switching device with improved operability.

The function switching device of the present invention is at least a function switching device of an audio device for selectively operating the recording medium playing device and any one of the first and second tuners. Recording medium playing device command means for generating a first operation command signal, storing a recording medium ON signal in a memory, generating a first stop command signal in response to ejection of the recording medium, and erasing the recording medium ON signal from the memory And a second operation command signal is generated in response to the operation of the tuner switch and the tuner-on signal is stored in the memory, and the second switch is operated in response to the operation of the tuner switch when the tuner-on signal is stored in the memory.
A tuner command means for generating a stop command signal and erasing the tuner on signal from the memory, and a second operation command signal from the tuner command means in response to the operation of the tuner switch in a state where the recording medium on signal is stored in the memory. First stop command means for generating a first stop command signal when an error occurs, and the first operation from the recording medium playing device command means in response to the loading of the recording medium in a state where the tuner-on signal is stored in the memory. Second when the command signal is generated
The second stop command means for generating a stop command signal, the first tuner command means for generating a first reception command signal in response to the operation of the first switch in a state where the tuner on signal is stored, and the tuner on signal are In response to the operation of the second switch in the stored state, the second tuner command means for generating the second reception command signal, and in response to the operation of the recording medium switch in the state where the recording medium ON signal is stored in the memory. The first recording medium performance return signal generating means for generating the first actuation command signal and the second stop command signal, and the tuner command means in response to the operation of the tuner switch in the state where the recording medium ON signal is stored in the memory. The second recording medium performance return signal generating means for generating the first operation command signal when the second stop command signal is generated, and the tuner-on signal A tuner return signal generating means for generating a second operation command signal when the first stop command signal is generated from the recording medium playing device command means in response to the discharge of the recording medium in the state stored in the memory; A power supply voltage is supplied to the recording medium playing device to operate the recording medium playing device in response to the operation command signal, and a first stop command signal or a first reception command signal and a second reception while the power source voltage is being supplied to the recording medium playing device A power supply voltage for the performance device power supply means for stopping the power supply voltage supply to the recording medium performance device in response to any one of the command signals, and a power supply voltage for the first or second tuner in response to the second operation command signal. The power supply voltage is supplied to the first tuner in response to the first reception command signal, the power supply voltage is supplied to the second tuner in response to the second reception command signal, and the power is supplied to the tuner in response to the second stop command signal. It is characterized by comprising a tuner power supply means for stopping the voltage supply.

Embodiments Embodiments of the present invention will be described below with reference to FIGS. 2 to 7.

In FIG. 2, the same parts as those in FIG. 1 are designated by the same reference numerals, and it is detected that the cassette half is loaded in a predetermined position of the cassette half storage chamber (not shown) of the tape deck 7 in the audio device. Then, the loading detection switch 21 that is turned on when the loading is detected and the ejection detection switch 2 that is turned on in association with the ejection key (not shown) for ejecting the cassette half from the predetermined position of the storage chamber to the outside.
2 and are provided. Also AM tuner section 8 or FM
A tuner switch 23 for instructing the supply and stop of power supply to the tuner unit 9 is provided on the keyboard 1 together with the tape switch 3 which is a recording medium switch, the AM switch 4 and the FM switch 5 which are the first and second switches.

Loading detection switch 21 and eject detection switch 22
The tape power supply unit 24 is connected to the tape power supply unit 24, and the tape power supply unit 24 responds to the turning-on of the loading detection switch 21.
The power supply voltage is supplied to the tape deck section 7 and the supply of the power supply voltage to the tape deck section 7 is stopped in response to the ejection detection switch 22 being turned on. The tape power supply unit 24 is also connected to the control circuit 10,
The power supply voltage supply operation state of the tape power supply unit 24 is transmitted to the control circuit 10 as a first operation state signal, and the control circuit 10 also controls the power supply voltage supply operation of the tape power supply unit 24. On the other hand, a tuner power supply unit 25 is connected to the tuner switch 23, and the tuner power supply unit 25 responds to a power supply command output from the tuner switch 23, and the AM tuner unit 8 and the FM tuner unit 9
The power supply voltage is supplied to either one of them, and the supply of the power supply voltage to the AM tuner unit 8 or the FM tape deck unit 9 is stopped in response to the power supply stop command. The tuner power supply unit 25 is also connected to the control circuit 10, and the power supply voltage supply operation state of the tuner power supply unit 25 is used as the second operation state signal in the control circuit 10.
And the control circuit 10 controls the power supply voltage supply operation state of the tuner power supply section 25. Also, tape deck section 7, AM tuner section 8
Output terminals of the FM tuner unit 9 are commonly connected to the amplifier 12. Note that the power supply command by operating the tuner switch 23 preferentially supplies the power supply voltage to either the AM tuner unit 8 or the FM tuner unit 9, and here, the FM tuner unit 9 has priority.

Next, the operation of the function switching device having such a structure according to the present invention will be described with reference to the flow charts of FIGS.

First, when the cassette half is loaded in 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 source section 24 as a first operation command signal. The tape power supply unit 24 supplies a power supply voltage to the tape deck unit 7 according to the first operation command signal. The operation state of the tape power supply unit 24 is transmitted to the control circuit 10 by the first operation state signal, and the control circuit 10 sends a tape-on signal indicating that the cassette half is loaded to the internal memory based on the content of the first operation state signal. Remember. When the power supply voltage is supplied to the tape deck section 7, the tape deck section 7 enters a tape reproducing state and supplies a reproduced audio signal to the amplifier 12.

When the eject key is operated in such a tape playback state,
When the eject detection switch 22 is turned on, the cassette half is ejected from the storage chamber to the outside. When the eject detection switch 22 is turned on, the first stop command signal is supplied to the tape power supply section 24, and the tape power supply section 24 stops the supply of the power supply voltage to the tape deck section 7. At this time, the first
The control circuit 10 detects that the cassette half is ejected according to the operating state, and the storage of the tape-on signal in the internal memory disappears.

Next, when the tuner switch 23 is operated, the tuner switch 23 supplies a power supply command, which is a second operation command signal, to the tuner power supply unit 25.
The power supply voltage is supplied from 5 to the FM tuner unit 9 to enter the FM broadcast receiving state. The operating state of the tuner power supply unit 25 is transmitted to the control circuit 10 by the second operating state signal. The control circuit 10 stores, in the internal memory, a tuner-on signal indicating that the tuner power supply 25 has been operated by the operation of the tuner switch 23 based on the content of the second operation state signal.

When the AM switch 4 is operated in the FM broadcast receiving state, the control circuit 10 supplies an AM reception command signal, which is a first reception command signal, to the tuner power supply unit 25. Tuner power supply 2
Reference numeral 5 stops the supply of the power supply voltage to the FM tuner unit 9 in response to the AM reception command signal and supplies the power supply voltage to the AM tuner unit 8. Therefore, the FM broadcast reception is stopped and the AM broadcast reception state is set.

When the FM switch 5 is operated in the AM broadcast receiving state,
The FM reception command signal which is the second reception command signal is supplied from the control circuit 10 to the tuner power supply unit 25. The tuner power supply unit 25 stops the supply of the power supply voltage to the AM tuner unit 8 and supplies the power supply voltage to the FM tuner unit 9 in response to the FM reception command signal. Therefore, the AM broadcast reception is stopped and the FM broadcast reception state is set.

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

Further, when the cassette half is loaded in a predetermined position in the cassette half storage chamber of the tape deck portion 7 in the reception state of the AM broadcast or the FM broadcast, the loading detection switch 21 is turned on and the first operation command signal is generated. A power supply voltage is supplied from 24 to the tape deck section 7. Control circuit 10
Stores the tape-on signal in the content memory when it detects the start of power supply to the tape power supply unit 24 from the content of the first operation state signal. Since the tuner-on signal is already stored, the second stop command signal is supplied to the tuner power supply unit 25. The tuner power supply unit 25 responds to the second stop command signal A
The power supply to the M tuner unit 8 or the FM tuner unit 9 is stopped. Therefore, the reception of the FM broadcast is stopped and the tape reproduction state is set. A tape-on signal and a tuner-on signal are stored in the internal memory of the control circuit 10.

When the tuner switch 23 is operated in such a tape reproduction 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 operation state signal and the tuner is supplied. The memory of the ON signal disappears from the internal memory. The tape playback state continues.

When the eject key is operated in the tape reproducing state in which the tape-on signal and the 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. The power supply voltage to 7 is stopped. At this time, the storage of the tape-on signal disappears from the internal memory of the control circuit 10 according to the content of the first operation state signal, and only the tuner-on signal is generated. Therefore, the control circuit 10 supplies the second operation command signal to the tuner power supply unit 25 and the tuner power supply unit 2
5 again supplies the power supply voltage to the tuner unit 8 or 9 immediately before the supply of the power supply voltage is stopped. Therefore, the AM or FM broadcast reception state is set.

On the other hand, when the tuner switch 23 is operated in the tape reproducing state in which only the tape-on signal is stored in the internal memory of the control circuit 10, the tuner power supply unit 25 supplies the power supply voltage to the FM tuner unit 9 according to the second operation command signal. To be done. When the control circuit 10 detects from the content of the second operation state signal that the tuner power supply 25 has been operated by the operation of the tuner switch 23, the control circuit 10 stores the tuner-on signal in the internal memory and the tape-on signal is already stored. Therefore, the first stop command signal is supplied to the tape power supply unit 24. The tape power supply unit 24 stops the supply of the power supply voltage to the tape deck unit 7 in response to the first stop command signal. Therefore,
The FM tuner unit 9 operates to enter the FM broadcast receiving state,
Tape playback is stopped. At this time, as shown in FIG. 7, the hub half 31a of the cassette half 31 has the hub shaft 3
2 is engaged, that is, the cassette storage chamber is loaded. Further, the rotation of the hub shaft 32 and the pinch roller 33 is stopped by stopping the power supply to the tape deck portion 7, and the pinch roller 33 and the magnetic head 34 are moved together with the support plate 35 from the cassette half 31 to the position of the broken line B in the direction of arrow A. Move and separate from the cassette tape.
Such a tape reproduction stop state is called a tape release state. In the tape reproducing state, the pinch roller 33 and the magnetic head 34, together with the support plate 35, are driven 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 in the FM broadcast receiving state when the tape deck section 7 is in the tape release state, the FM broadcast reception is stopped and the AM broadcast receiving state is set by the same operation as in the case where the tape release state is not set. , The tape release state is continued. Also, when the FM switch 5 is operated in the AM broadcast receiving state when the tape deck section 7 is in the tape release state, the FM broadcast receiving state is set by the same operation as in the case where the tape release state is not set.

When the tuner switch 23 is operated while the tape deck unit 7 is in the tape release state, a second stop command signal is generated, so that the supply of the power supply voltage from the tuner power supply unit 25 to the AM or FM tuner units 8 and 9 is stopped. . The internal memory of the control circuit 10 erases the storage of the tuner-on signal according to the content of the second operation state signal and stores only the tape-on signal, so that the first operation command signal is supplied to the tape power supply unit 24. Therefore, the tape power supply unit 24 supplies the power supply voltage to the tape deck unit, and the tape deck unit 7 returns from the tape release state to the tape reproduction state.

Further, when the tape switch 3 is operated while the tape deck section 7 is in the tape release state, the control circuit 10 causes the first
A second operation command signal is supplied to the tape power supply unit 24.
The stop command signal is supplied to the tuner power supply unit 25. Therefore, the tape power supply unit 24 supplies the power supply voltage to the tape deck unit 7, and the tuner power supply unit 25 stops the supply of the power supply voltage to the tuner unit 8 or 9, so that the function is switched from the broadcast reception state to the tape reproduction state. .

When the AM switch 4 is operated in such a tape playback state,
The control circuit 10 supplies the AM power supply command signal with the second operation command signal to the tuner power supply unit 25 and the first stop command signal to the tape power supply unit 24, so that the tuner power supply unit 25 supplies the AM tuner unit 8 with the power supply voltage. Then, the tape power supply unit 24 stops the supply of the power supply voltage to the tape deck unit 7. Therefore, the function becomes the AM broadcast receiving state, and the mode of the tape deck section 7 becomes the tape releasing state. When the FM switch 5 is operated instead of the AM switch 4, an FM reception command signal accompanied by the second operation command signal is generated, and the FM broadcast reception state is set.

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

In the above-described embodiment of the present invention, the loading detection switch 21 and the ejection detection switch 22 are connected to the tape power supply section 24, the tuner switch 23 is connected to the tuner power supply section 25, and the operation states of these switches are changed. Although the power supply operation of the power supply units 24 and 25 is directly controlled by the power supply units 24 and 25, this is not restrictive. For example, by connecting the loading detection switch 21, the ejection detection switch 22 and the tuner switch 23 to the control circuit 10 as shown in FIG. 8, the control circuit 10 can be operated according to the operating states of these switches.
It is also possible to control the power supply operation of the power supply units 24 and 25.

In the above embodiment, the case where the tape deck is used as the recording medium playing device has been described, but a digital audio disc player or the like can also be used.

Effects As described above, according to the function switching device of the present invention, a desired function can be obtained by a single operation, and at least one of the functions of the recording medium performance and the first and second tuners can be changed to another function. 1
Switching to the function of can also be performed by a single operation, and the operability is significantly improved. For example, in the tape playback state, by operating the tuner switch, FM
If the tape switch is operated after switching to the broadcast receiving state, it immediately returns to the tape reproducing state. If the tuner switch or FM switch is operated in the returned tape reproduction state, the FM broadcast reception state at the reception frequency immediately before the switching to the tape reproduction state is restored. Further, if the AM switch is operated in the returned tape reproducing state, the mode is switched to the AM broadcast receiving state. Therefore, tape playback, AM and F
Each function of M broadcast reception can be easily selected. In addition, it is possible to obtain a function giving priority to an operation instruction and to return to a function prior to the giving priority to a function by a single operation. Further, the function switching device of the present invention is extremely suitable for function switching of an in-vehicle audio device.

[Brief description of drawings]

FIG. 1 is a block diagram showing a conventional function switching device, FIG. 2 is a block diagram showing an embodiment of the present invention, and FIGS. 3 to 6 are flow charts showing the operation of the device of FIG. FIG. 8 is a diagram showing 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 8 ... AM tuner 9 ... FM tuner 10 ... Control circuit 21 Loading detection switch 22 Eject detection switch 23 Tuner switch 24 Tape power supply section 25 Tuner power supply section

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Koichi Sugano No. 25 Nishimachi, Yamada character, Kawagoe City, Saitama Prefecture Pioneer Co., Ltd., Kawagoe Factory (72) Inventor Yasushi Yasuto, Toyota City, Aichi Prefecture, the first place in Toyota Town Toyota Auto Car Co., Ltd. (72) Inventor Nobunari Izu Nobunari Toyota Town Ichibanchi, Aichi Prefecture Toyota Motor Co., Ltd. (56) References Japanese Patent Laid-Open No. 59-110084 (JP, A) Actual Development Sho 58-141627 (JP, U) Actual public Sho 56-36198 (JP, Y2)

Claims (1)

[Claims] 1. A function switching device for an audio device for selectively activating at least a recording medium playing device and any one of the first and second tuners, the first switching device being adapted to load a recording medium. A recording medium playing device command for generating an operation command signal, storing a recording medium ON signal in a memory, generating a first stop command signal in response to ejection of the recording medium, and erasing the recording medium ON signal from the memory Means for generating a second operation command signal in response to operation of the tuner switch and storing the tuner-on signal in the memory, and operating the tuner switch in a state in which the tuner-on signal is stored in the memory Tuner command means for generating a second stop command signal and erasing the tuner on signal from the memory, and the recording medium on A first stop command means for generating the first stop command signal when the second operation command signal is generated from the tuner command means in response to an operation of the tuner switch in a state in which a signal is stored in the memory. When the tuner-on signal is stored in the memory, the second stop command signal is output when the first operation command signal is generated from the recording medium playing device command means in response to loading of the recording medium. Second stop command means for generating, a first tuner command means for generating a first reception command signal in response to an operation of the first switch in a state where the tuner-on signal is stored in the memory, and the tuner-on signal Second tuner command means for generating a second reception command signal in response to the operation of the second switch in a state where is stored in the memory, First recording medium performance return signal generating means for generating the first operation command signal and the second stop command signal in response to an operation of the recording medium switch in a state where the recording medium ON signal is stored in the memory. A first operation command signal is generated when the second stop command signal is generated from the tuner command means in response to an operation of the tuner switch while the recording medium ON signal is stored in the memory; 2 recording medium playing return signal generating means, and the first stop command signal is generated from the recording medium playing device commanding means in response to ejection of the recording medium in a state where the tuner-on signal is stored in the memory. Tuner return signal generating means for generating the second operation command signal, and the recording medium playing device according to the first operation command signal. Any one of the first reception command signal and the second reception command signal during power supply to the recording medium playing device by supplying a power supply voltage to the recording medium playing device to operate. A power source voltage supply means for stopping the power source voltage supply to the recording medium performance device in response to the signal of No. 1 and a power source voltage for the first or second tuner in response to the second operation command signal. A power supply voltage is supplied to the first tuner according to a first reception command signal, a power supply voltage is supplied to the second tuner according to the second reception command signal, and a power supply voltage is supplied to the tuner according to the second stop command signal. A function switching device for an audio device, comprising: a tuner power supply means for stopping power supply voltage supply.