JP2814541B2 - Remote control device - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a remote control device that performs various remote controls such as opening and closing a door of a vehicle and opening and closing a garage.

[Conventional technology]

Conventionally, a keyless entry device that opens and closes using a transmitter instead of a key when opening and closing a door of a vehicle has been put to practical use. In such a keyless entry device, when the driver operates the transmitter from outside the vehicle, a predetermined code signal is transmitted from the transmitter and received by the receiver on the vehicle body. When the code signal matches a predetermined code, the door of the vehicle is opened and closed. The code transmitted from the transmitter is always the same signal.

[Problems to be solved by the invention]

However, according to such a conventional keyless entry device, there is a possibility that such a code signal may be known to a third party for some reason such as loss of a transmitter. Then, once the code signal is stolen by a third party, the third party can always open and close the door with the transmitter, and there is a problem that the third party may be stolen.

The inventions of claims 1 to 4 of the present application have been made in view of such a problem of the conventional remote control device for transmitting a code signal. It is a technical task to prevent use.

[Means for Solving the Problems] The invention according to claim 1 of the present application is, as shown in FIG. 1, a transmitter 1 configured integrally with an engine key and transmitting a code signal.
And a receiver 2 that discriminates a code signal from the transmitter and outputs a control signal at the time of the coincidence, and the transmitter includes a plurality of ID code tables and a current ID code among the ID codes. A memory 3 for holding an ID code, and an ID code update for detecting a rise of power supplied when a key provided on the transmitter is mounted and updating a specific code among the ID codes held in the memory as a working ID code. Means, and a transmitting means 5 for transmitting the ID code updated by the ID code updating means. The receiver comprises: receiving means 6 for receiving a signal transmitted from the transmitter; A memory 7 for holding a plurality of ID code tables identical to the memory and an active ID code among the ID codes, and a transmitter among the ID codes held in the memory when power is supplied to the transmitter; ID code updating means 8 for updating one code as a working ID code; and determining means 9 for determining whether a received signal obtained from the receiving means matches the updated ID code. is there.

Further, as shown by the broken line in FIG. 1, the invention of claim 2 of the present application is characterized in that the transmitter of the invention of claim 1 has a charging circuit for charging an internal battery from a power supply supplied by mounting an engine key. It is assumed that.

According to a third aspect of the present invention, there is provided a remote control having a transmitter integrally formed with an engine key for transmitting a code signal, and a receiver for determining a code signal from the transmitter and outputting a control signal when the code signal coincides with the transmitter. A control device, wherein the transmitter has a memory for storing an ID code given when the key is mounted, and a transmitting means for transmitting the ID code held in the memory, and the receiver is provided by the transmitter Receiving means for receiving a signal to be transmitted, ID code generating means for generating an ID code each time power is supplied to a transmitter, and a data code output unit for sending an ID code after the ID code is generated by the ID code generating means. Determining means for determining a match between the received signal obtained by the receiving means and the updated ID code.

Further, in the invention of claim 4 of the present application, the transmitter receives the ID code superimposed on the power supplied by mounting the key, and the data code output section of the receiver is superimposed on the power when the key is mounted on the transmitter. In this case, the ID code is transmitted.

[Action]

According to the first aspect of the present invention having such a feature, the memory provided in the transmitter holds an ID code table including a plurality of ID codes and the current ID code. The rising of the power supplied when the vehicle is mounted on the vehicle is detected and updated from the ID code table in the memory to make the current ID code. According to the invention of claim 2 of the present application, in addition to this function, the battery in the transmitter is charged via a charging circuit using a power source obtained when the engine key is mounted on the vehicle.

Further, according to the third and fourth aspects of the present invention, the transmitter holds a code signal given from the vehicle by mounting the key as an ID code. The next time you use the transmitter to lock or unlock the door, the updated ID
The code is transmitted from the transmitting means.

In the first and second aspects of the present invention, the receiver has the same memory as the transmitter and updates the code simultaneously with the power supply to the transmitter. In the third and fourth aspects of the present invention, the power is supplied to the transmitter. The ID code is sent when it is done. When a code signal is transmitted from the transmitter, it is determined that the ID code matches the updated ID code and remote control is performed.

〔The invention's effect〕

Therefore, according to the first to fourth aspects of the present invention, even when the transmitter is stolen and its code signal is known to a third party, the ID code is automatically updated each time the correct transmitter is used. Therefore, it cannot be used with the transmitter of the stolen code signal. Therefore, it is possible to reliably perform remote control control with a relatively simple configuration and improve safety.

According to the second aspect of the present invention, the internal battery can be charged by the charging circuit in the transmitter when the engine key is mounted. According to the invention of claim 3 of the present application, the ID code data is transmitted from the receiver to the transmitter, so that the transmitter can transmit the ID code data without using an ID code table memory for holding a large number of ID codes in the transmitter. Power can be supplied and data can be transmitted.

Further, in the invention of claim 4 of the present application, the code signal is superimposed on the power supply, so that the internal battery of the transmitter is charged using the two-terminal transmitter, and the code signal is transmitted from the receiver side. Can be.

[Explanation of Example]

FIG. 2 is a top view showing the structure of the transmitter 20 of the first embodiment according to the first and second aspects of the present invention, and FIG. 3 is a block diagram thereof. In these figures, an engine key 22 of a vehicle is integrally fixed to the tip of a case 21. And case 21
A secondary battery 23, for example, a nickel cadmium battery or the like is inserted therein. As shown in FIG. 2, electrodes 25 are formed on both surfaces of the engine key 22 via an insulating plate 24, and electrodes 26 (not shown) are formed on the rear surface. A rubber surface 28 for operating the push button switch 27 is provided on the upper surface of the case.

Now, the transmitter 20 is provided with a bridge circuit 31 for rectifying the voltage obtained at both ends using the electrodes 25 and 26 on both surfaces of the engine key as a pair of input terminals. The voltage obtained from the bridge circuit 31 is rectified by the voltage converter 32 and the diode 33
To the charging circuit 34 via The charging circuit 34 is a transmitter
The secondary battery 23 in the battery 20 is charged, and the positive terminal of the secondary battery 23 is connected to the power supply terminal of the arithmetic circuit 35. The output of the voltage converter 32 is given to the arithmetic circuit 35 as a trigger signal. The arithmetic circuit 35 is realized by a microcomputer including an internal memory and an input / output interface, and supplies an ID code held in the memory to the infrared output circuit 36 as a serial signal. The switch 27 that is pressed during transmission is connected to the arithmetic circuit 35.

As shown in FIG. 4, the memory 37 in the arithmetic circuit 35 has an ID code table 37a for storing a plurality of ID codes and an area 37b for storing a current ID code selected from the table. As shown in FIG. 4, a plurality of ID codes are selected by sequentially incrementing the code change counter 37c. Here, the current ID code 37b is also formed from a fixed code and a copy protection code, and the copy protection code is selected from a table and used as the current ID code. The arithmetic circuit 35 supplies the ID code to the infrared output circuit 36 when the push button switch 27 is pressed, and also copies the copy protection code in the memory 37 based on a trigger signal from the voltage converter 32 into an ID code table. Update from 37a.

On the other hand, as shown in FIG. 5, the receiver 40 provided in the vehicle includes a power supply circuit 41 that supplies the voltage of the vehicle battery as a predetermined stabilized voltage to each block of the receiver, and an accessory key switch 42. It has an input circuit 43 connected to the output terminal. The input circuit 43 supplies a signal to the arithmetic circuit 44 when the engine key is turned on at the accessory (Acc) position. Further, it has an infrared sensor 45 for receiving an infrared signal from the transmitter 20 and converting it into an electric signal, and an amplifier 46 for amplifying its output and shaping its waveform. The arithmetic circuit 44 is the transmitter 20
An internal memory 47 including an ID code table similar to the arithmetic circuit 35, and a microcomputer including an input / output interface (not shown), and a copy protection code added to the fixed code for each trigger signal given from the input circuit 43. Is updated and held as a new ID code.If a code signal is obtained from the infrared sensor 45 via the amplifier 46, it is determined whether or not this signal matches the updated ID code. To a lock / unlock control unit 48 for locking / unlocking the door. Lock / unlock controller 48
Determines whether the door of the vehicle is locked or unlocked, and drives the door lock motor 49 in the unlock direction in the locked state and in the locked direction when unlocked.

Next, the operation of this embodiment will be described. In the flowchart of FIG. 6, the arithmetic circuit 44 in the vehicle determines whether the accessory switch 42 is turned on from the input circuit 43 (step 51). When the engine key 22 of the transmitter 20 is inserted into the key cylinder and the accessory switch 42 is turned on, the process proceeds from step 51 to 52, where the code change counter is incremented. Then, in step 53, the copy protection code is changed. At the same time, power is supplied to the transmitter 20 from the accessory switch 42 via the terminals 25 and 26 of the transmitter 20. At this time, the transmitter 20
Regardless of the mounting direction of 22, the DC voltage is converted into a DC voltage in a predetermined direction via the diode bridge 31, and the secondary battery 23 is charged via the voltage converter 32 and the charging circuit. Then, when this voltage is applied, a trigger signal is given to the arithmetic circuit 35,
6, the code change counter 37c of the memory 37 is incremented by the trigger signal. Then, a new ID code is held by the selected copy protection code and the fixed code.
In this state, the working ID of the memory 37, 47 in the transceiver of the vehicle is used.
Codes match.

Therefore, when the engine key 22 of the transmitter 20 is extracted from the key cylinder and the push button switch 27 of the transmitter 20 is pressed to use the lock to unlock or unlock the door from outside the vehicle, the arithmetic circuit 35 is used when the push button 27 is pressed. More memory
The current ID code held in 37 is the infrared output circuit 36
Is transmitted as an infrared signal through On the other hand, when the receiver 40 receives this signal, it is converted into an electric signal by the infrared sensor 45 and the signal is sent to the arithmetic circuit 44 via the amplifier 46.
When the ID code matches the ID code at that time, the door of the vehicle is locked or unlocked.

As described above, in the inventions of claims 1 and 2 of the present application, the same ID code is automatically updated from the table held in the memory and set every time the engine key switch is mounted on the key cylinder and the accessory switch is turned on. After that, it is determined whether the transmission code signal matches or not based on the ID code.

Next, the invention of claim 3 of the present application will be described with reference to embodiments. FIG. 7 shows a second embodiment of the present invention.
FIG. 8 is a block diagram showing a transmitter according to the embodiment, and FIG. 8 is a side view thereof. The same parts as those in the first embodiment are denoted by the same reference numerals, and detailed description thereof will be omitted. In FIG. 8, the transmitter 60 is provided with two pairs of electrodes 61 to 64 on both sides of the engine key via insulating plates, respectively. An input terminal and a data code input terminal are provided to diode bridges 31 and 65, respectively. Then, the output of the diode bridge 31 is rectified by the voltage converter 32 as in the above-described embodiment, and the battery 23 in the transmitter is charged through the diode 33 and the charging circuit 34. The power supply terminal of the battery 23 is connected to the power supply terminal of the arithmetic circuit 66. The diode bridge 65 connected to the data code input terminal is for obtaining a signal in the same direction regardless of whether the engine key 22 is mounted in any direction.
Given to 66. The infrared output circuit 36 and the push button switch 27 are connected to the arithmetic circuit 66. The arithmetic circuit 66 changes the data code signal given from the input circuit every time a change trigger input is given and holds the changed data code signal in the memory 68.When the push button switch 27 is pressed, the held ID code is converted to the infrared code. This is sent to the output circuit 36. In this embodiment, the corresponding receiver is an arithmetic circuit 44.
It is not necessary to have an ID code table in the memory 47 inside,
It is necessary to have a code generating means 69 for generating a code changed by a random number or the like as shown by a broken line in FIG. Further, a data code output section 70 for providing the generated code signal from an output terminal is required.

Next, the operation of this embodiment will be described with reference to the flowcharts of FIGS. When the transmitter starts operation, it waits in step 71 whether or not the accessory switch 42 has been turned on from off, and if the accessory is turned on, in step 72 the data code input terminals 63 and 64 pass through the input circuit 67 via the input circuit 67. Check if a start mark has been sent. If the start mark has not been sent, it is checked whether or not the accessory switch 42 has been turned off (step 73). If the accessory switch 42 has been turned off, the operation is terminated.
If the start mark is given, the process proceeds to step 74, where the ID obtained from the data code terminal through the input circuit 67 is output.
Receive a copy protection code from the codes. Then, it waits for the completion of reception, transfers the received data to the copy protection code area of the ID code, stores the data, and ends the processing. When the push button switch 27 is pressed, the transmitter 60 outputs the stored ID code from the infrared output circuit 36.

When the receiver starts operation as shown in FIG. 10, first, in step 81, it is checked whether or not there is a switch input from the accessory switch. If there is a switch input, the process proceeds from step 81 to 82, where a random number is generated by a predetermined processing program, and the random number is transferred to the data transmission buffer. Then, it is checked whether or not the start mark has been transmitted, and if it has not been transmitted, the process proceeds to step 85, where the start mark is transmitted from the data code output section 70 and it is checked whether or not the accessory switch has been turned off. If it has not been turned off, the process proceeds from step 84 to 87, and it is checked whether data transmission has been completed.
If the data transmission has not been completed, the data is transmitted in step 88 to check whether the accessory switch 42 has been turned off. Accessory switch 42
Is turned off, the operation is terminated. If not turned off, the process returns to step 87 to continue data transmission. When the data transmission is completed, the process proceeds to step 90, where the transmission data is written in the copy protection code area and a new ID code is set. Then, when a signal is obtained from the infrared sensor 45, it is determined whether or not the ID code matches the obtained code signal.
48 is operated to control the locking or unlocking of the vehicle door.

Next, a third embodiment of the present invention will be described with reference to FIG. In this embodiment, the ID code is transmitted to the transmitter while being superimposed on the power transmission. In this figure, the same parts as those of the above-described conventional example are denoted by the same reference numerals, and detailed description is omitted. In this embodiment, an output transistor 101 is connected to the arithmetic circuit 44 of the receiver as a data code output unit 70, and this output terminal and a ground terminal are connected via a pair of electrodes 102 and 103 provided on both sides of the engine key. Connected to the transmitter. The transistor 101 is a PNP transistor, the emitter of which is connected to the accessory switch terminal, supplies power to the transmitter when the accessory switch is turned on, and changes ID code data output from the arithmetic circuit 44 when the accessory switch is turned on. Is superimposed on the power signal. On the other hand, the receiver has a diode bridge 31 and a voltage converter 32, and the output of the voltage converter 32 is provided to the arithmetic circuit 104 as a data change input. The arithmetic circuit 104 holds the data of the copy protection code given after the start mark in its memory 105, and thereafter, when the push button switch 27 is pressed,
The ID code is transmitted to the receiver as an infrared signal. In this case, power can be supplied using the two terminals to charge the internal battery of the transmitter, and the ID code can be transmitted from the receiver for each use.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a functional configuration of the first and second aspects of the present invention, FIG. 2 is a perspective view of a transmitter according to a first embodiment of the present application, FIG. 3 is a block diagram showing the configuration, FIG. 4 is a diagram showing the memory and the ID code in the memory, FIG. 5 is a diagram showing the configuration of the receiver of this embodiment, FIG. 6 is a flowchart showing the operation of the transmitter and the receiver, FIG. FIG. 8 is a block diagram showing an example of a transmitter according to the second embodiment of the present application, FIG. 8 is a schematic diagram showing the structure of the transmitter according to the second embodiment of the present application, and FIG.
FIG. 10 and FIG. 10 are flowcharts showing the operation of the transmitter and the receiver of this embodiment, respectively, and FIG. 11 is a block diagram showing the entire configuration of the remote control device according to the third embodiment of the present invention. 1,20,60 ... transmitter, 2,40 ... receiver, 3,7,37,47 ... memory, 5 ... transmitting means, 6 ... receiving means, 9 ... determining means, 10 ... Charging circuit, 22 ... Engine key, 23 ... Battery, 25,26,61 to 64,102,103 ... Electrode, 27 ... Push button switch, 31,65 ... Diode bridge, 32 ... Voltage converter, 34 ... Charging circuit, 35, 44, 66, 104 ... Calculation circuit, 36
...... Infrared output circuit

Claims (4)

(57) [Claims] 1. A remote control device comprising: a transmitter integrally formed with an engine key for transmitting a code signal; and a receiver for judging a code signal from the transmitter and outputting a control signal when the code signal matches the code signal. The transmitter includes a plurality of ID code tables and a current ID among the ID codes.
A memory for holding a code, and an ID code update for detecting a rise of power supplied when a key provided on the transmitter is mounted and updating a specific code among the ID codes held in the memory as a working ID code. Means, and transmitting means for transmitting the ID code updated by the ID code updating means, wherein the receiver comprises: receiving means for receiving a signal transmitted from the transmitter; and the transmitter A plurality of the same ID code table as the memory and a memory holding the current ID code of the ID codes, and when supplying power to the transmitter, the transmitter among the ID codes held in the memory. ID code updating means for updating the same code as a working ID code, and determining means for determining whether a received signal obtained from the receiving means matches the updated ID code. A remote control device, characterized in that: 2. The remote control device according to claim 1, wherein said transmitter has a charging circuit for charging an internal battery from a power supply provided by mounting an engine key provided on said transmitter. 3. A remote control device comprising: a transmitter integrally formed with an engine key for transmitting a code signal; and a receiver for determining a code signal from the transmitter and outputting a control signal when the code signal matches the code signal. Wherein the transmitter has a memory for storing an ID code given when the key is mounted, and a transmitting means for transmitting the ID code held in the memory, and the receiver comprises the transmitter Receiving means for receiving a signal transmitted from the transmitter, ID code generating means for generating an ID code each time power is supplied to the transmitter, and a data code for sending an ID code after the ID code is generated by the ID code generating means. A remote control device comprising: an output unit; and a determination unit configured to determine a match between a received signal obtained by the reception unit and an updated ID code. 4. The transmitter according to claim 1, wherein the transmitter receives an ID code superimposed on a power supplied by mounting the key.
4. The remote control device according to claim 3, wherein the data code output section of the receiver transmits an ID code by superimposing the ID code on a power supply when a key of the transmitter is mounted.