JP3279518B2 - Remote control device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a remote controller useful for adjusting an adjustable variable circuit element in a receiving section. More specifically, when a locator signal in which a code signal is superimposed on a carrier signal in a remote control device is transmitted from a main body of an electric device by radio waves, sound,
The present invention relates to a remote control device which is effective when used as a receiving unit in a remote control unit having a remote control locator function of notifying the position of a remote control unit by vibrating or emitting light.

[0002]

2. Description of the Related Art Conventionally, in household electric appliances such as televisions, VCRs, air conditioners and the like, remote control operations are performed because frequent operation of channel selection and volume or temperature adjustment is required. ing.

[0003] Conventionally, for example, Japanese Utility Model 7-1525
In No. 2, a service mode for teletext in a television receiver can be performed by key operation of a remote control unit, and a special mode setting key for reading a special mode setting program for teletext is operated by a normal key operation of the remote control unit. There is disclosed a technique in which the device is provided at a position distant from the unit, for example, inside a battery storage case, and is arranged so as not to be touched by a normal key operation at all.

After operating the remote controller, the user may forget the place where the remote controller unit is placed and search around. To solve this inconvenience, when the power supply of the product body, for example, the power supply of the television is turned on, a locator signal is transmitted as a radio wave from the television for, for example, 5 seconds, and when the radio wave is received by the remote control unit, a sound is emitted. There is a technique called a remote control locator function for notifying the location of a remote control unit, and has recently been used frequently. Here, the locator signal transmitted from the device body is a signal in which a dedicated code for the locator is superimposed on a 390 MHz carrier (carrier) by AM modulation, and its transmission time is set to 5 seconds according to the FCC standard.

[0005] When a remote-control-operation-type electric device having a remote-control locator function is produced in a factory, adjustment and testing of the remote-control locator function are performed on a production line basis. And conventionally, it was performed as follows. That is, a test jig is connected to the main body of the electric device in order to continuously output the carrier signal, and the variable capacitor or the like of the transmission circuit in the main body of the electric device is connected while the carrier signal is continuously output. The adjustment adjusts the frequency of the carrier signal, that is, the transmission frequency. After the adjustment, a locator signal on which the locator code is superimposed is output, and after confirming the response state on the remote control unit side, the test jig is removed from the electric device body.

In addition, the receiving section of the remote control unit also needs to tune to the carrier frequency of the radio wave from the device body. Conventionally, when tuning the receiving section, a clip is mechanically inserted between the transistor circuits. The connection is short-circuited to adjust the tuning, and the tuning etc. is mechanically connected to each clip at the time of tuning adjustment, and the clip etc. must be attached and detached, which takes time and labor It takes.

[0007]

SUMMARY OF THE INVENTION The present invention has been made to solve such a conventional problem. When adjusting a variable circuit element of a receiving section in a remote control unit, a mechanical jig is required. An object of the present invention is to provide a remote control device capable of adjusting a variable circuit element without attaching or detaching.

[0008]

According to a first aspect of the present invention, there is provided a remote control device for remotely controlling an electric device main body, wherein a remote controller transmits a carrier signal transmitted from the electric device main body. A receiving unit for receiving a signal on which a locator signal is superimposed; and a notifying unit for notifying a location when the receiving unit receives the signal, the electric device body includes a transmitter, and the transmitter includes a locator. The locator signal is transmitted when the operation confirmation mode is set, and the carrier signal is continuously transmitted when the adjustment mode is set.When the adjustment mode is set on the remote control device side, the transmitter adjusts. A remote circuit device in a mode, wherein a variable circuit element for varying a tuning frequency of a tuning circuit in the receiving unit; and the receiving unit connected between the receiving unit and a DC drive power supply circuit. A switching circuit that supplies or cuts off driving power, and a control circuit that controls the switching circuit, and controls the switching circuit by the control circuit when adjusting the variable circuit element to supply driving power to the receiving unit. By adjusting the variable circuit element by causing the receiving unit to operate, the control circuit starts operation by inputting a predetermined secret number to a key to make the switching circuit conductive, and The switching circuit is interrupted by inputting another password.

According to a second aspect of the present invention, in the first aspect of the present invention, a through hole for adjustment is provided at a position corresponding to the variable circuit element in a casing of the remote controller. According to a third aspect of the present invention, in the first aspect, the variable circuit element is a variable inductance or a variable capacitor.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a block diagram of a remote control device according to the present invention, showing an electric device main body operated by remote control operation and a circuit block built in the remote control unit. FIG. 2 is a specific circuit diagram of the inside of the remote control unit. Here, a television receiver is described as an example. In FIG. 1, a CPU 4 and a ROM constituting a microcomputer (control circuit) 3 are provided inside a chassis or cabinet (housing) 2 of the electric device main body 1.
5. RAM 6 is incorporated.

Now, when the power of the main body of the television receiver is turned on, the carrier signal (390 MHz) as shown in FIG.
A locator signal in which a locator code is superimposed on z) by AM modulation is transmitted from the transmitter 7 for 5 seconds. On the other hand, the chassis or cabinet (housing) of the remote control unit 20
A microcomputer (control circuit) 23 is provided inside 22.
, A CPU 24, a ROM 25, and a RAM 26. Then, as shown in FIG. 3B, in order to suppress the consumption of the battery, a pulse that repeats at an interval shorter than 5 seconds and continues for a period that can detect the presence or absence of radio wave input from the transmitter 7 is used. Drive DC power is supplied to the high-frequency amplifiers Q1 and Q2 in FIG. 2 described later (FIG. 3B shows a voltage waveform supplied to the base side of Q3). Therefore, when a locator signal is transmitted each time the power is turned on from the receiver main body 1, the locator signal is received by the receiving unit 27 built in the remote control unit 20,
As soon as the detection of the locator signal is detected by the detection operational amplifier Q4, the driving DC power thereafter is supplied to Q1, Q2 and other circuits continuously for several seconds, not in a pulse form. . The output of Q4 is subjected to waveform shaping by an operational amplifier Q5 for waveform shaping, and then supplied to an audio signal generation circuit (not shown). Announce. In addition, the remote-control-operated electric device has a carrier frequency mode and a locator operation confirmation mode as one of so-called factory modes for adjusting and testing the remote control locator function.

The carrier frequency mode of the transmitter 7 is a mode for continuously outputting the carrier signal of the transmitter 7 of the electric device main body 1 in order to easily adjust the frequency of the signal. The locator confirmation mode is a mode in which a locator signal is transmitted to confirm the operation of the remote control locator function.

The electric equipment main body 1 is provided with a microcomputer 3 for controlling the entire electric equipment main body.
The microcomputer 3 includes a light receiving unit 8 (which also serves as a unit for receiving a mode transmitted from the remote control unit 20) for receiving data or the like transmitted as infrared rays from the remote control unit 20, and a locator signal. A transmitter 7 and the like for transmitting the data are connected. The microcomputer 3 uses the software to function to continuously output the carrier signal from the transmitter 7 when the mode received by the light receiving unit 8 is the carrier frequency adjustment mode, and to set the mode received by the light receiving unit 8 A function of transmitting a locator signal from the transmitter 7 when in the locator operation confirmation mode is exhibited.

The remote control unit 20 is provided with a microcomputer 23 for controlling the entire remote control unit. The microcomputer 23 is connected to a key 29 for remotely controlling the main body 1 of the electric equipment. Sets the carrier frequency mode and the locator operation confirmation mode. Further microcomputer 2
A light emitting unit 30 (also serving as a means for transmitting a carrier frequency adjustment mode and a locator operation confirmation mode) for transmitting data and the like set and input through the key 29 as infrared rays is displayed on the display unit 3. Display unit 31
(Which also functions as a display unit for displaying a locator code), a receiving unit 27 that receives a locator signal transmitted as a radio wave from the electric device body 1, a speaker 28 that emits a sound when the locator signal is received, and the like. It is connected.

Next, the operation of the microcomputer 23 of the remote control unit 20 will be described. When a volume adjustment up / down key or the like included in the key 29 is pressed, the software shifts from the normal processing of the remote control unit 20 to the carrier frequency adjustment mode. That is, a code of the carrier frequency adjustment mode is created, output from the light emitting unit 30, and transmitted. Pressing the volume adjustment up / down key again cancels the carrier frequency mode.

Now, the mode shifts to the locator mode operation check mode as described later. That is, a code for the locator operation confirmation mode is created and output to the light emitting unit 30, and the code is transmitted. Thereafter, the locator signal is transmitted as a radio wave from the electric device main body 1 and is transmitted to the receiving unit 27.
And a code included in the locator signal is extracted. If the code matches the locator code, the speaker 28 beeps and the code content is displayed on the display 31. When the locator code is displayed on the display 31 in the locator operation check mode, it is confirmed that the remote control locator function in the remote control unit 20 and the electric device body 1 is operating reliably.

FIG. 2 shows the receiving section 27 of the remote control unit 20.
FIG. In FIG. 2, Q1 is a high-frequency amplifier. After a signal in which a locator signal is superimposed on a carrier signal from the transmitter 7 is received by an antenna, the signal is supplied as an emitter input of a transistor Q1. The signal is supplied to the base, further supplied to the operational amplifier Q4 for detection at the subsequent stage, and further supplied to the operational amplifier Q5 for waveform shaping. Q6 is a buffer transistor amplifier, the output of which is input to the CPU 24, and the microcomputer 23 determines whether or not a signal from the electric device body 1 has been received. An audio signal generation circuit (not shown) is instructed to generate audio.

The transistor Q3 forms a switching circuit. When a low voltage (L) is supplied to the base electrode, the transistor Q3 is turned on, drive power is supplied to the transistors Q1 and Q2, and Q1 and Q2 are in the operating state. Becomes Conversely, when a high voltage (H) is supplied to the base electrode, Q3 is turned off, that is, cut off, and the operations of Q1 and Q2 stop.

Next, the operation of the microcomputer 3 of the electric device body 1 will be described. Remote control unit 20
When the light receiving section 8 of the electric device main body 1 receives the code of the carrier frequency adjustment mode transmitted from the
Shifts to the carrier frequency adjustment mode from the normal processing.
That is, a predetermined signal is generated and output to the transmitter 7, and the carrier signal in the transmitter 7 is continuously output.

Further, in this state, a signal in which a locator signal is superimposed on a carrier frequency signal is supplied from the antenna to the emitter of Q1 in the receiving section 27 of the remote control unit 20.
When a password, for example, "1", "4", "8", "6" for causing the receiving unit 27 to be in the locator operation check mode is input to the key 29 of
"L" is continuously supplied to the base electrode, and Q3 is turned on (ON), and Q1 and Q2 are also turned on. In this state, the inductance of the variable inductance element L1 of the tuning circuit including the variable inductance element L1 and the capacitor C1 connected to the collector side of Q2 is adjusted, and the inductance value is adjusted so that the output of the locator signal is maximized. . Then again, for example, "
When 1 "" 4 "" 8 "" 6 "is pressed, the locator operation confirmation mode is canceled by the software of the microcomputer 23. The capacitor C1 may be a variable capacitor. This eliminates the need for mechanically shorting the emitter and collector of Q3 with a clip as shown by the broken line in Fig. 2. In addition, the chassis and / or cabinet just above the variable inductance L1 is unnecessary. Since a through hole for adjustment is provided on the 22, there is no need to remove the cabinet or chassis every time the frequency is adjusted.

[0021]

As described above, the remote control device of the present invention is a remote control device for remotely controlling the main body of an electric equipment, and receives a signal in which a locator signal is superimposed on a carrier signal transmitted from the main body of the electric equipment. And a notifying unit for notifying the presence position when the receiving unit receives the signal, the electric device body includes a transmitter, and the transmitter transmits a locator signal when in the locator operation confirmation mode. Then, when in the adjustment mode, the carrier signal is continuously transmitted, and in the remote control device in which the transmitter is in the adjustment mode when the adjustment mode is set on the remote control device side, in the reception unit, A variable circuit element that varies a tuning frequency of a tuning circuit; and a switch that is connected between the receiving unit and the DC driving power supply circuit and that supplies or cuts off driving power to the receiving unit. Operating the receiving unit by controlling the switching circuit by the control circuit and supplying driving power to the receiving unit when the variable circuit element is adjusted. State, adjust the variable circuit element, and further, the control circuit starts operation by inputting a predetermined secret number to a key to turn on the switching circuit, and further inputs another secret number. Since the switching circuit is cut off by doing, it is not necessary to mechanically attach or remove a special jig to bring the amplifier circuit or the transmission circuit into an operating state at the time of adjustment,
You can save time and effort.

Further, all the preparations for the adjustment operation can be performed only by key input of the remote control unit, and further labor can be saved.

Further, as described in claim 2, the casing of the remote control device is provided with a through hole for adjustment at a corresponding position of the circuit element. There is no need to remove or attach, and the adjustment work can be performed efficiently.

[Brief description of the drawings]

FIG. 1 is a block diagram of a remote control device of the present invention.

FIG. 2 is a circuit block diagram incorporated in a remote control unit in the remote control device of the present invention.

FIG. 3A is a waveform diagram illustrating a waveform of a locator signal in which a locator code is superimposed on a carrier signal transmitted from an electric device main body. (b) is a waveform diagram showing a voltage waveform supplied to the base side of the switching circuit Q3.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Electric apparatus main body 2, 22 Case 3, 23 Microcomputer (control circuit) 4, 24 CPU 5, 25 ROM 6, 26 RAM 7 Transmitter 8 Light receiving part 20 Remote control unit 27 Receiving part 28 Speaker 29 Key 30 Light emitting part 31 Display C1 Capacitor L1 Variable inductance element Q1, Q2, Q3 Transistor Q4, Q5 Operational amplifier Q6 Buffer amplifier

──────────────────────────────────────────────────続 き Continued on the front page (58) Fields surveyed (Int. Cl. ⁷ , DB name) H04Q 9/00 301 H03J 9/02 H04B 1/06 H04N 5/00 H04N 5/44

Claims (3)

(57) [Claims] 1. A remote control device for remotely controlling an electric equipment main body, wherein a carrier signal transmitted from the electric equipment main body is provided.
Bei a reception unit, and a notifying means for the receiver to announce the location and receiving the signal, the electric apparatus unit transmitter that receives a superimposed signal of the locator signal to No.
When the transmitter is in the locator operation confirmation mode,
Sends the locator signal, and when in adjustment mode, carries
Signal is sent continuously, and the remote
When the adjustment mode is set on the control device side, the transmitter adjusts
A remote circuit device in a mode , wherein: a variable circuit element that varies a tuning frequency of a tuning circuit in the receiving unit; and a switching device that is connected between the receiving unit and the DC drive power supply circuit to supply or cut off driving power to the receiving unit. A control circuit for controlling the switching circuit, wherein the control circuit controls the switching circuit when the variable circuit element is adjusted to supply driving power to the reception unit, thereby causing the reception unit to operate. by the adjusting the variable circuit elements, previously constant further wherein the control circuit key
Start the operation by entering the password
Making the switching circuit conductive, and another secret code
To shut off the switching circuit.
Remote control device, characterized in that that. 2. The circuit device according to claim 2, wherein the circuit element is provided in a housing of the remote controller.
2. The adjustment through hole according to claim 1, wherein an adjustment through hole is provided at a corresponding position of.
Remote control device. 3. The variable circuit element has a variable inductance.
The remote control according to claim 1, wherein the remote control is a variable capacitor.
Device.