JPH0332119Y2 - - Google Patents

Description

[Detailed Description of the Invention] (a) Field of Industrial Application The present invention relates to a multi-band radio receiver that can switch reception bands using a remote control device.

(b) Prior Art Most radio receivers are capable of receiving multiple broadcast bands (e.g. FM, MW, SW), as described in Japanese Utility Model Publication No. 10828/1982. This is a multi-band radio receiver, and the radio receiver usually switches the broadcast band to be received by switching a band switching switch. The band changeover switch is generally operated by operating a plurality of band changeover operation buttons provided on the operation panel of the radio receiver, corresponding to the respective broadcast bands. Therefore, the desired broadcast band can be received by operating any one of the operation buttons according to the broadcast band to be received, which has good operability.

(c) Problems that the invention aims to solve By the way, recent electronic devices are equipped with remote control devices (hereinafter referred to as remote control devices), and an increasing number of devices are designed to be remotely controlled using such remote control devices. Ta. Since electronic equipment has become multi-functional, the remote control device is also designed to be able to operate in various operating modes. As a result, the number of operation buttons has increased, and the remote control device has become larger. For example, in a synthesizer radio receiver that digitally creates a local oscillation frequency for reception,
Operations such as raising and lowering the receiving frequency, calling up preset broadcasts, and switching the receiving band can be performed using the remote control device. and,
The radio receiver can be preset to more than ten stations, and in addition to radio broadcasts such as FM, MW, and SW, there are also many that can recently receive the sound of television broadcasts. Since the remote control device is provided with a plurality of operation buttons corresponding to the number of presets and a plurality of operation buttons corresponding to the number of broadcast bands that can be selected, the remote control device has a large number of operation buttons. here,
From the viewpoint of ease of holding, it is preferable that the remote control device be large enough to fit in one hand.Also, in order to prevent erroneous operation, the remote control device is arranged so that it does not touch adjacent operation buttons when operating it, so the number of operation buttons is small. This increase directly leads to an increase in the size of the remote control device.
Therefore, it may be undesirable to increase the number of operation buttons on the remote control device. Particularly in stereo equipment, there has been an increase in the number of shared remote control devices in recent years, so that a single remote control device can be used to operate an amplifier, tuner (radio receiver), CD player, record player, tape deck, etc. Therefore, since there is a tendency for the number of operation buttons to increase in remote control devices, it is better not to increase the number of operation buttons unnecessarily.

The present invention aims to provide a multi-band radio receiver that is made in view of the above points.

(d) Means for solving the problem The multi-band radio receiver according to the present invention is provided with a plurality of radio receivers corresponding to each broadcast band on the operation panel of the radio receiver, and a plurality of channels for switching the reception band. A band switching operation button, a band switching control means for controlling band switching of a tuner section which is a reception function part that receives broadcasts according to the operated operation button, and a band switching control means that is provided on the remote control device and that controls the reception band. a single band switching remote control button for switching, and reception for sequentially selecting from the band switching control means when the remote control receiving circuit receives a band switching signal transmitted from the remote control device in response to the operation of the remote control button. and signal generating means for generating a sending signal for switching bands.

(E) Effect In this invention, when selecting a reception band on the radio receiver body, the user operates the button corresponding to the desired broadcast band among the band switching operation buttons, and selects the reception band using the remote control device. When switching bands, the user operates a remote control button for band switching a desired number of times.

(F) Embodiment Figure 1 shows an embodiment of the present invention.
2 is a band switching control circuit that controls band switching of the tuner section 1, and 3 is an unlocked momentary FM corresponding to each receivable broadcast band. Consisting of a band switch 4, a MW band switch 5, a SW band switch 6, and a TV band switch 7, a band switching operation switch 8 is used to switch the reception band.
to 11 are the FM band switch 4, respectively.
MW band switch 5, SW band switch 6,
and first to fourth transistors that are controlled according to the operation of the TV band switch 7; 12 is a remote control device for remote control; 13 is a unit provided in the remote control device 12 and for switching the reception band; One band switching remote control button 14 receives a remote control signal transmitted from the remote control device 12, and the band switching remote control button 13 receives a remote control signal transmitted from the remote control device 12.
The output terminal 14 receives a band switching signal generated from the remote control device 12 when the remote control device 12 is operated.
a remote control receiving circuit that generates an "L" level signal from a, a fifth transistor 15 that is controlled in response to reception of a band switching signal in the remote control receiving circuit 14, and 16 that generates pulses with different predetermined periods. First and second output terminals 17a and 1
7b and the first or second output terminal 17a or 1
It has first to fifth input terminals 18a to 18e into which the pulses output from 7b are input, and the first
A switch detection means 19 detects the operation switch 3 operated according to the pulse input to the fifth input terminals 18a to 18e and the terminal to which the pulse is input, and the operation switch 3 detected by the switch detection means 19. The switch detection means 19 generates a control signal for generating a switching signal for switching the receiving band of the tuner section 1 from the band switching control circuit 2 in accordance with the operating state.
When the pulse output from the first output terminal 17a is input to the first input terminal 18a and the pulse output from the second output terminal 17b is input to the second input terminal 18b at the same time, This microcomputer is equipped with a signal generating means 20 for generating a sending signal for generating a switching signal from the band switching control circuit 2 so that the broadcast bands received by the tuner section 1 are sequentially switched in a cyclic operation.

Also, Fig. 2 shows the operation panel of the radio receiver main body, where 21 is an up-down button for raising and lowering the reception frequency, 22 is a display for displaying the reception frequency, and 23 is for storing the desired broadcast frequency. and a preset button for calling up the stored broadcast frequency, 24 corresponds to the receiving band.
This is a band switching operation button for switching the reception band, which is composed of an FM band button 25, a MW band button 26, a SW band button 27, and a TV band button 28.

Next, the operation will be explained with reference to FIGS. 1 and 2.

First, when selecting a reception band using the radio receiver main body, a desired operation button is operated from among the band switching operation buttons 24 provided on the operation panel. Then, a predetermined operation switch in the band switching operation switch 3 is closed in accordance with the selected operation button. Therefore, depending on the closed operation switch, the first to fourth transistors 8 to 1
A predetermined transistor in 1 is turned on. When the transistor is turned on, a pulse of a predetermined period outputted from the second output terminal 17b of the microcomputer 16 is outputted from the second to fifth input terminals 18b to 18e of the microcomputer 16 according to the transistor that is turned on. Since the signal is input to the terminal, the switch detecting means 19 of the microcomputer 16 detects the closed band switching operation switch 3. When the closed band switching operation switch 3 is detected by the switch detection means 19, the signal generating means 20 of the microcomputer 16 generates a control signal in accordance with the closed band switching operation switch 3. do. Therefore, since the band switching control circuit 2 generates a switching signal for switching the reception band of the tuner section 1, the broadcast band corresponding to the band switching operation button 24 operated by the tuner section 1 is received. For example, when receiving an FM broadcast band, the FM band button 25 of the band switching operation buttons 24 is operated. Then, the FM band switch 4 of the band switching operation switch 3 is closed, but since the fifth transistor 15 remains off due to the backflow prevention diode 29, the first
Only transistor 8 is turned on. Therefore, a pulse of a predetermined period outputted from the second output terminal 17b of the microcomputer 16 is inputted to the second input terminal 18b of the microcomputer 16 via the emitter-collector of the first transistor 15. The switch detection means 19 detects that the FM band button 25 is closed, and the signal generation means 20 generates a corresponding control signal.
Therefore, the band switching control circuit 2 generates a switching signal for switching the reception band of the tuner section 1 to the FM broadcast band, and the tuner section 1 receives the FM broadcast band. Thereafter, the tuner section 1 receives the desired broadcast by operating the up-down button 21 to tune the frequency. Here, the tuner section 1 has an antenna input circuit, a high frequency amplification circuit, a local oscillator, a mixing circuit, an intermediate frequency amplification circuit, and a detection circuit, and transmits a signal received from the antenna 30 to the high frequency amplification circuit through the antenna input circuit. extracts and amplifies only the desired signal, converts it to an intermediate frequency in a mixing circuit using the oscillation frequency from a local oscillator, selectively amplifies the intermediate frequency in an intermediate frequency amplification circuit, detects it in a detection circuit, and outputs it as an audio signal. It is configured to be taken out from the terminal 31. The tuner section 1 switches the reception band by switching the elements used in the antenna input circuit, local oscillator, detection circuit, etc.

Next, when selecting a reception band using the remote control device 12, a band switching remote control button 13 provided on the remote control device 12 is operated. Then,
A remote control signal corresponding to the operation of the remote control button 13 is transmitted from the remote control device 12, and the remote control signal is received by the remote control receiving circuit 14 included in the radio receiver body by the remote control signal receiving section 32 provided on the operation panel surface. Ru. When the remote control signal is received by the remote control receiving circuit 14, the output terminal 14a becomes "L" level.
The fifth transistor 15 is turned on. At the same time, the "L" level of the output terminal 14a of the remote control receiving circuit 14 causes the FM band switch 4 of the band switching operation switch 3 to be closed, and the first transistor 8 is turned on. Therefore, pulses of different predetermined cycles outputted from the first and second output terminals 17a and 17b of the microcomputer 16 are inputted to the first and second input terminals 18a and 18b of the microcomputer 16, respectively. Switch detection means 1
9 detects the operation of the band switching remote control button 13 of the remote control device 12, and the signal generating means 20
generates a sending signal in response, and the band switching control circuit 2 generates a switching signal so that the broadcast bands received by the tuner section 1 are sequentially switched. Therefore, according to the operation of the band switching remote control button 13 of the remote control device 12, the tuner section 1
Since the broadcast bands to be received are sequentially switched, a desired broadcast band can be received by operating the remote control button 13 a predetermined number of times. The band switching control circuit 2 outputs the signal from FM to MW by the sending signal generated from the signal generating means 20.
A switching signal is generated that performs a cyclic operation to select the reception band in the order of →SW→TV→FM, so if the tuner section 1 is currently receiving the SW band and attempts to receive the FM band, , it is sufficient to operate the remote control button 13 twice. That is, the first operation of the remote control button 13 switches the reception band to the TV band, and the second operation switches the reception band to the FM band.

(g) Effects of the invention As described above, the present invention allows the user to select a reception band using the radio receiver body by operating the desired band switching operation button provided corresponding to each broadcast band. When selecting a reception band using the remote control device, the user operates a single band switching remote control button the desired number of times, thus maintaining the ease of reception band selection on the radio receiver itself. However, it is a practical device that can reduce the number of operation buttons on the remote control device.

In particular, the present invention uses two types of signals by simultaneously driving a predetermined transistor for the remote control and a predetermined transistor for the operation button when sequentially switching the reception band in response to the operation of a remote control button. Since this is different from selecting a receiving band by the radio receiver body, it has the advantage that the receiving band switching method can be selected without malfunction, and the receiving band can be switched reliably by the remote control device.

[Brief explanation of the drawing]

Figure 1 is a circuit diagram showing one embodiment of the present invention;
The figure is a front view showing the operation panel surface of the radio receiver main body. Explanation of main drawing numbers, 1...Tuner section, 2...Band switching control circuit, 3...Band switching operation switch, 12...Remote control device, 13...Remote control button for band switching, 14...Remote control reception Circuit, 16...Microcomputer, 19...Switch detection means, 20...Signal generation means, 24...
...Operation button for band switching.

Claims (1)

[Scope of utility model registration request] In a multi-band radio receiver capable of receiving a plurality of broadcast bands, a tuner section serving as a receiving function section for receiving broadcasts, a band switching control means for controlling band switching of the tuner section,
a remote control receiving circuit for receiving a remote control signal from a remote control device for remote control; a single band switching remote control button provided on the remote control device for switching a reception band; and operation of the remote control button. A remote control device that is controlled on and off in accordance with a band switching signal output from the remote control receiving circuit when the remote control signal for band switching transmitted from the remote control device in conjunction with the above is received by the remote control receiving circuit. Transistors, multiple band switching operation buttons are provided on the operation panel of the radio receiver body corresponding to each broadcast band, and are used to switch the reception band. - A plurality of operation button transistors that are turned off and at least one of which is turned on and off in response to a band switching signal output from the remote control circuit, and the operation button transistors and the remote control transistor are turned on and off. switch detection means for monitoring the OFF state and detecting the operation states of the operation button and the remote control button; and a signal for generating a switching signal for switching the reception band of the tuner section in accordance with the detection output of the switch detection means. generating means, when the operation button is operated, the control signal for switching to the reception band corresponding to the operated operation button by driving the operation button transistor alone without driving the remote control transistor is generated. A sending signal is generated from the signal generating means, and also causes the signal generating means to sequentially switch reception bands by simultaneously driving predetermined ones of the remote control transistor and the operation button transistor when the remote control button is operated. A multi-band radio receiver characterized by: