JPH09130864A - Remote controller - Google Patents

Abstract

PROBLEM TO BE SOLVED: To execute the charging of the secondary battery of a portable device in short time by driving an LED by the output of a charging circuit during the charging of the secondary battery based on electromagnetic waves. SOLUTION: A main body device 3 is provided with an electromagnetic wave generation part 1. A key unit 2 as a portable device is provided with a secondary battery 1 7 and an LED 40. The electromagnetic wave from the generation part 1 is received, a charging circuit 19 generates DC power based on this reception and a secondary battery 17 is charged. During the charging of this secondary battery 17, the LED 40 is driven by the output of the charging circuit 19. Therefore, the on/off control of the LED 40 is capable of performing charging in short time without consuming the secondary battery 17 at the time of charging the secondary battery 17.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a remote control device for wirelessly transmitting a personal identification code signal to a main body device by operating a portable device and controlling a controlled part provided in the main body device, and more particularly to a portable device. The present invention relates to a remote control device equipped with a secondary battery.

[0002]

2. Description of the Related Art Conventionally, remote control devices for locking and unlocking by transmitting and receiving signals using radio waves such as electromagnetic waves have been used in doors of automobiles and houses, and in the field and industry of home electric appliances such as televisions. Various remote control devices are also used in the field of industrial equipment. In such a remote control device, the portable device wirelessly sends a personal identification code signal in response to a user operation. When the received personal identification code signal is a proper signal, the main body unit performs a control operation according to the controlled unit, such as locking and unlocking or switching the channel of the television. In such a remote control device,
When a primary battery is used as a power source of a portable device, the replacement work is required due to exhaustion of the battery, which is time-consuming, and therefore a secondary battery has been proposed.

[0003]

In a conventional remote control device using a secondary battery, when a portable device is operated during a charging period or a light emitting diode (LE) incorporated in the portable device is used.
When a portable device needs to consume power during charging, such as when displaying that charging is being performed by D) or the like, power is supplied from the secondary battery being charged.
Therefore, there is a problem that the electric power of the secondary battery is consumed even during charging and it takes a long time to charge.
The present invention has been made in view of the above problems, and an object of the present invention is to provide a remote control device capable of charging a secondary battery incorporated in a portable device in a short time.

[0004]

SUMMARY OF THE INVENTION A remote control device of the present invention is an electromagnetic wave generation part for generating an electromagnetic wave in a remote control device for wirelessly controlling a controlled part provided in a main body by operating a portable device. And a secondary battery charged by the DC power generation unit, and an auxiliary circuit unit, the DC power generation unit configured to receive the electromagnetic wave and generate DC power based on the electromagnetic wave, and the auxiliary circuit unit. The auxiliary circuit means is driven by the electric power from the DC power generating means while the secondary battery is charged by the DC power generating means. The DC power generation means of the portable device receives the electromagnetic wave from the electromagnetic wave generation unit provided in the main body and generates DC power. The secondary battery is charged by the DC power generating means. On the other hand, the auxiliary circuit means is driven by the electric power from the DC power generating means. That is, since the auxiliary circuit means is driven by the electric power from the DC power generating means and is not driven by the electric power from the secondary battery, the secondary battery is not exhausted even when controlling the auxiliary circuit means at the time of charging, which is short. Can be charged in time.

[0005]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described with reference to FIGS. In the drawings, the same parts are denoted by the same reference numerals. FIG. 1 is a schematic block diagram showing the present embodiment. In FIG. 1, a power transmission circuit 1 as an electromagnetic wave generation unit mounted on a vehicle (not shown) that is a main body, a receiver 3, and a vehicle battery 4, and a key unit 2 that is a portable device are provided. Power transmission circuit 1
And the receiver 3 is powered by the battery 4.

The power transmission circuit 1 is composed of a power transmission coil 8, an oscillation circuit 9 and a power feed switch 10 which are embedded and wound around a key insertion hole 6 of a cylinder lock 5 shown in FIG. The cylinder lock 5 generally has a built-in ignition switch having four contacts. This 4
Two contact positions are, as shown in FIG. 2, an OFF position where a key can be inserted and removed, an ACC position where power is supplied to accessories such as a radio, an ON position where power is supplied to all electric systems including an engine control block, and a starter motor. There are four types of ST positions that are driven to start the engine.

Further, the oscillator circuit 9 includes a battery 4 on the vehicle side.
A circuit for driving the power transmission coil 8 at a high frequency by being supplied with power from a power supply switch 10. The power supply switch 10 is a structure for turning on and off high frequency driving of the power transmission coil 8. The power supply switch 10 is on / off controlled by a microcomputer (MPU) provided in a receiver 3 described later and recognizing the position of an ignition switch. As will be described later, when the MPU turns off the power supply switch 10, the ignition switch turns off.
It is also performed except when it is rotated to the FF or ACC position.

The power transmission coil 8, the oscillation circuit 9 and the receiver 3 are an immobilizer (a key unit which has circuits such as a memory device storing a secret code, a transmission / reception coil and a transmission circuit and which is not equipped with a power source, and the key unit. And a main body for supplying power to the key unit by electromagnetically coupling to the key unit, and comparing the personal identification code transmitted from the key unit electrically supplied by electromagnetic coupling with the personal identification code stored in the storage device of the main body. However, it also serves as a device used for starting the engine when the two personal identification codes have a predetermined relationship. This reduces the number of circuits newly required for the charging function and simplifies the configuration. In the present embodiment, the circuits and mechanisms peculiar to the immobilizer are omitted.

The receiver 3 is connected between the battery 4 and the oscillation circuit 9 and is intermittently supplied with electric power from the vehicle-side battery 4, receives the personal identification code signal transmitted and output from the transmitter 15 as a radio wave, and receives the electric power. It has a structure in which it is determined whether or not it matches the stored secret code, and an operation control signal is output on condition that both secret codes match. In response to the operation control signal, a lock mechanism section (not shown) performs a door locking or unlocking operation. The receiver 3 also has a function as a power supply stopping unit. The power supply stopping means is
When the receiver 3 receives the secret code signal from the key unit 2 while the oscillation circuit 9 drives the power transmission coil 8 at a high frequency, the power supply switch 10 in the oscillation circuit 8 is turned off,
It is a means for stopping the high frequency driving of the power transmission coil 8. In this state, even if the receiver 3 receives the personal identification code signal, the operation control signal is not output to the lock mechanism section.

On the other hand, in the key unit 2, the power receiving coil 20 is connected to a charging circuit 19 as a DC power generating means. The secondary battery 17 and the transmitter 15 are connected to the first output terminal of the charging circuit 19, and the display circuit 40 is connected to the second output terminal of the charging circuit 19. Further, as shown in FIG. 2, the key unit 2 has two key-side LEDs 2 as additional circuit means on the grip portion 16.
6 and a push switch 18 as an operating means are provided. These key-side LEDs 26 emit red light and blue light, respectively.

FIG. 3 is a detailed circuit diagram of the key unit 2 shown in FIG. In FIG. 3, the power receiving coil 20 is connected to the capacitor C1 and forms a current generating circuit 21 by an LC resonance circuit. The current generating circuit 21 is connected to a rectifying / smoothing circuit 22 including a diode D1 and a capacitor C2. The rectifying / smoothing circuit 22 includes a constant voltage circuit 23 including a Zener diode ZD and a backflow prevention diode 24.
Also, it is connected to the secondary battery 17 via the protection resistor 25.

That is, when the key 7 is inserted into the key insertion opening 6 of the cylinder lock 5 and the power transmitting coil 8 is driven at a high frequency to generate a magnetic field, the power receiving coil 20 is transferred to the power transmitting coil 8.
Is magnetically coupled to. The current generation circuit 21 resonates at a predetermined frequency and generates a high frequency AC voltage. Rectifying and smoothing circuit 22
Is the diode D1 that supplies the AC voltage from the current generation circuit 21.
Is rectified, smoothed by the capacitor C2, and a DC voltage is output. The constant voltage circuit 23 maintains the voltage supplied to the secondary battery 17 at a constant predetermined voltage by the voltage reference function of the Zener diode ZD.

The LED 26 on the key side is switched and operated by an LED drive circuit consisting of a resistor 27 and a capacitor 28 connected in parallel at the subsequent stage of the constant voltage circuit 23 of the charging circuit 19 and a built-in microcomputer (MPU) 37. It is connected to the LED switch 29. The key side LED 26 and the LED switch 29 form a display circuit 40.

The connection point between the resistor 27 and the diode 24 is connected to the first control input section of the microcomputer (MPU) 37 via the diode 31 and the resistor 32. The secondary battery 17 is connected to the second control input section of the MPU 37 via the switch 18 and the resistor 34, and is connected to the control output section of the MPU 37 via the voltage detection circuit 36. The diode 31 is grounded via the diode 30 and the voltage dividing resistor 35.
The output section of the MPU 37 is connected to the transmission circuit 39 via the modulation circuit 38.

On the other hand, a steering column of a vehicle (not shown) to which the power transmission circuit 1 is attached also has a steering column (not shown) 2
Two body side LEDs are provided. These body side L
The ED is driven and controlled by the MPU incorporated in the receiver 3 and emits red light and blue light, respectively.

In the remote controller constructed as described above, when the push switch 18 of the key unit 2 is pressed to turn on the push switch 18,
A high level signal is supplied from the secondary battery 17 to the first control input section of the MPU 37 via the push switch 18 and the resistor 34. In response to this, the MPU 37 enters the transmission mode, the secret code stored in the MPU 37 is modulated by the modulation circuit 38, and then transmitted and output as a radio wave through the transmission circuit 39 and the antenna.

When the personal identification code signal transmitted and output is received by the receiver 3 through the antenna, the receiver 3 demodulates the personal identification code signal received and locks on the condition that the personal identification code stored in the receiver 3 coincides. An operation control signal is output to a section (not shown). In response to the operation control signal, the lock mechanism unit locks or unlocks the vehicle door. When the push switch 18 is turned off, the MPU3
Since the low level signal is supplied to the second control input unit 7 of 7, the transmission mode ends.

Next, the charging mode for charging the secondary battery 17 will be described. FIG. 4 and FIG.
4 is a flowchart for explaining the charging mode, FIG. 4 shows a flow of processing executed by the MPU of the receiver 3, and FIG. 5 shows a flow of processing executed by the MPU 37 of the transmitter 15. First, the key unit 2
When the key 7 is inserted into the key insertion hole 6 and the ignition switch is turned to the ON position (step S401),
The power supply switch 10 is turned on to supply power to the oscillation circuit 9 (step S402). Then, the main body side LED (not shown) provided in the steering column is driven and lights up in red (step S403).

On the other hand, the oscillating circuit 9 drives the power transmission coil 8 at a high frequency, whereby a magnetic field is generated around the power transmission coil 8. Then, since the power transmission coil 8 and the power reception coil 20 on the key unit 2 side are magnetically coupled, the power reception coil 2
An alternating current flows through 0 due to electromagnetic induction. This alternating current is converted into direct current by the rectifying / smoothing circuit 22 and converted into a constant voltage by the constant voltage circuit 23, and then the secondary battery 1 is passed through the backflow prevention diode 24 and the protection resistor 25.
7 is supplied. As a result, the secondary battery 17 is charged.

At the same time, since the high level signal is supplied to the second control input section of the MPU 37 via the diode 31 and the resistor 32, the MPU 37 is in the charging mode, the voltage detecting circuit 36 is supplied with power, and the voltage detecting circuit 36 is supplied. The circuit 36 starts to function (step S501). As a result, the voltage of the Zener diode ZD forming the constant voltage circuit 23 is detected (step S502), and it is recognized that the secondary battery 17 is being charged. When it is recognized that the secondary battery 17 is being charged, a secret code signal is transmitted (step S503).

Next, it is determined whether or not the voltage value of the secondary battery 17 has reached a predetermined voltage (for example, 3.1 V).
It is determined whether or not the secondary battery 17 is fully charged (step S504), and if it is not fully charged, the key-side LED 26 blinks in red (step S505). On the other hand, if the secondary battery 17 is fully charged, the secret code signal is again transmitted and output from the transmitter 15 (step S506), and the key side LED 26 blinks in blue (step S507). Then, a standby state for 5 seconds is entered (step S508).

Here, in order to blink the key side LED 26, the MPU 37 causes the key side LE of the color to be turned on.
The LED switch 29 corresponding to D26 is turned on. As a result, the corresponding key-side LED 26 is driven and emits light by using the charge stored in the capacitor 28 provided in the LED drive circuit for the key-side LED 26 as an electromotive force. At this time, the charging time of the capacitor 28 in the LED drive circuit is 1.2 seconds as an example, and the discharging time of the capacitor 28 due to lighting of the key side LED 26 is 0.1 seconds as an example. Therefore, in this case, the key side LED 26 is 1.
Flashes in a cycle of 0.1 seconds in 3 seconds.

On the one receiver 3 side, step S40
After 3, after receiving the personal identification code signal within the standby time of 3 seconds (steps S404 and S406), when the personal identification code signal is received again (step S405), the power supply switch 10 is turned off to supply power to the oscillation circuit 9. Is stopped (step S407), and the main body side LED is lit in blue (step S408). Then, the main body side LED is kept lit in blue until the ignition switch is turned to the ACC position or the OFF position (step S).
409). If it is determined in step S406 that the personal identification code signal has not been received within 3 seconds, or if the ignition switch is in the ACC position or OF in step S409.
If it is determined that the LE has been rotated to the F position, the LE on the main body side
D is turned off (step S410).

In the key unit 2, after waiting for 5 seconds in step S508, the voltage of the Zener diode ZD is detected again (step S509). That is, since the receiver 3 should have stopped supplying power to the oscillation circuit 9 after the secret code signal is transmitted (step S407),
In the normal operating state, the voltage of the Zener diode ZD should not be detected in step S509. Therefore, in this case, the key-side LED 26 is turned off (step S51
0), the charging process for the secondary battery 17 ends. At the same time, the power supply to the voltage detection circuit 36 is stopped (step S511), thereby reducing the power consumption of the secondary battery 17. On the other hand, if the voltage of the Zener diode ZD is detected in step S509, some kind of inconvenience should have occurred in operation, and therefore step S504 is performed again.
Then, the secret code signal is transmitted and output again.

As is apparent from the charging operation for the secondary battery 17 described above, after the secondary battery 17 is fully charged, the power supply to the oscillation circuit 9 is stopped (step S407), and the battery on the vehicle side consumes unnecessary power. It will not be strong.
Therefore, battery exhaustion under adverse conditions is prevented. The constant voltage circuit 23 for constant voltage charging of the secondary battery 17 has a simple structure using a Zener diode ZD. Therefore, the structure is simplified and power consumption is low.

While the secondary battery 17 is being charged, the LED 26 is driven not by the electric power from the secondary battery 17 but by the electric power from the constant voltage circuit 23, so that the LED 26 is driven to blink. However, the power of the secondary battery 17 is not consumed, and the secondary battery 17 is charged even while the LED 26 is blinking, so that the secondary battery 17 is charged quickly. Further, after the charging is completed, the power supply to the voltage detection circuit 36, which is a circuit means that needs to be driven only during the charging, is stopped, so that the power consumption of the secondary battery 17 can be reduced.

Here, the key side LED 26 and the main body side LED
With, it is possible to display various states independently or by combining the lighting and blinking states. For example,
In a normal operation state, the key-side LED 26 blinks red to indicate that the secondary battery 17 is being charged, the blue LED blinks to indicate full charge, and the light-off LED 26 indicates that charging is complete. Further, when the LED on the main body side lights up in red, the power transmission coil 8 is being driven for oscillation, and when it is lighted in blue, it indicates that the secret code signal has been received and the oscillation driving of the power transmission coil 8 has been stopped.

Therefore, in a normal charging operation, the key side LED 26 blinks in red and the main body side LED lights in red for 3 seconds or more while the secondary battery 17 is being charged. After the charging is completed, the key side LED 26 blinks in blue for 5 seconds and then turns off, and the main body side LED keeps lighting in blue, and turns off when the ignition switch is turned to the ACC position or the OFF position. On the other hand, for example, when the main body side LED is lit in red and the key side LED 26 continues to blink in blue or is turned off, it can be seen that some failure has occurred.

As is clear from the above description, according to the present embodiment, the LED 26 is driven by the electric power from the secondary battery 17 while the secondary battery 17 is being charged. Since the electric power is supplied from the constant voltage circuit 23, the secondary battery 17 is not consumed even if the LED 26 is driven to blink, and the secondary battery 17 is charged even while the LED 26 blinks. Charging is performed. Further, since the voltage detection circuit 36 is supplied with drive power only in the charging mode, power is not supplied to the circuit that needs to be driven only in the charging mode in the transmission mode, so that the power consumption can be reduced. Is possible.

In the present embodiment, L is used as the additional circuit means.
Although the example of the ED is given, other circuits can be used as the additional circuit means as long as the circuits do not directly contribute to the charging operation. In the present embodiment, an example of the remote control device that unlocks or locks the vehicle door has been described, but the remote control device that remotely controls the start of the vehicle engine, the channel switching of the TV, and the video running control. The present invention can be applied to various remote control devices such as a remote control device for home electric appliances for remote control of the above, or an industrial remote control device for remotely controlling the vertical position of a backhoe. As described above, according to the present invention, since the auxiliary circuit means is supplied with power from the DC power generating means and is not supplied with power from the secondary battery, the secondary battery is consumed even when controlling the auxiliary circuit means during charging. It can be charged in a short time.

[Brief description of the drawings]

FIG. 1 is an overall block diagram showing an embodiment of the present invention.

FIG. 2 is a structural diagram for explaining the operation of the embodiment of the present invention.

FIG. 3 is a detailed circuit diagram of a key unit used in the embodiment of the present invention.

FIG. 4 is a flowchart for explaining the operation of the embodiment of the present invention.

FIG. 5 is a flowchart for explaining the operation of the embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Power transmission circuit which comprises an electromagnetic wave generation part 2 ... Key unit as a portable device 3 ... Receiver which comprises a main body device 17 ... Secondary battery 19 ... which constitutes a DC power generation means Charging circuit 26 ... LED constituting additional circuit means

Claims (1)

[Claims] 1. A remote control device for wirelessly controlling a controlled part provided in a main body by operating a portable device, wherein an electromagnetic wave generation part for generating an electromagnetic wave is provided in the main body to receive the electromagnetic wave. , A DC power generation means for generating DC power based on this, a secondary battery charged by the DC power generation means, and an auxiliary circuit means are provided in the portable device, and the secondary battery generates the DC power. The remote control device, wherein the auxiliary circuit means is driven by the electric power from the direct current power generating means while being charged by the means.