JPH07184283A - Remote controller for vehicle load - Google Patents

Abstract

PURPOSE:To surely prevent illicit act caused by intercept of a radio wave signal from a remote key from being performed through the reception synchronous with a transmission signal from the remote key with simple configuration. CONSTITUTION:When an operation switch 4 of a remote key is operated, a transmission circuit 5 sends a transmission time count value T1 and a transmission unit time count value N1 counted by a transmission code shift register 17 and an ID code C1 corresponding to them as a radio wave signal. A receiver uses a count output circuit 30 to generate a reception time count value T1 and a reception unit time count value N2 at a point of time of the reception and rads a corresponding IC code C2 from a vehicle side memory, and a collation circuit collates the unit time counts and the ID codes respectively and provides a matching detection signal only when the both are matched. Thus, the preventive effect against an illicit act is improved.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle load remote control device for remotely controlling a vehicle load such as a door lock mechanism.

[0002]

2. Description of the Related Art Some vehicles such as automobiles are equipped with a so-called wireless door lock device. The transmitter circuit is installed inside the key grip of the remote key that can be inserted into the ignition key cylinder and the door key cylinder, and the radio circuit is transmitted by operating the transmitter circuit when the driver turns on the operation switch. Then, the receiving device provided on the vehicle body side receives and decodes the radio wave signal, and when the radio wave signal is the signal of the identification code specified for the car, the door lock mechanism is operated to open the door. It is configured to automatically lock or unlock automatically.

Such a wireless door lock device is
The user can automatically lock the door or automatically unlock the door by simply operating the operation switch to cause the transmission circuit to perform the transmission operation, which is very convenient in use.

[0004]

However, recently,
A remote controller with a learning function that receives a radio signal, copies the identification code, and can transmit the identification code again as a radio signal is considered,
When such a remote controller is abused and the radio signal from the remote key is intercepted, it becomes possible to illegally unlock the door of the vehicle by the radio signal from the remote controller regardless of the regular remote key, There was a security problem.

In the above case, when the user is absent from the vicinity of the automobile, there is a case where the illegal act can be executed without being restricted by time, and the identification code is decoded to make a trial and error. As a result, there is a possibility that the lock of the door of the automobile may be illegally released.

Therefore, conventionally, a plurality of types of identification codes are stored in both the transmitter circuit on the remote key side and the receiver on the vehicle body side, and a radio signal (identification code) is transmitted and received between the transmitter circuit and the receiver. A so-called rolling code type wireless door lock device has been developed in which both identification codes are cyclically changed in a predetermined order each time.

However, in this case, it is necessary to maintain a synchronous relationship between the transmission order of the identification code from the transmission circuit side and the collation order of the identification code on the reception device side. If the operating switch is operated inadvertently to cause the radio signal to be transmitted, or if the transmitted radio signal is not received by the receiving device on the vehicle body side, this radio signal is transmitted to the vehicle body side. Even though the receiving device does not receive, only the transmission order of the identification code on the remote key side is changed, and there is a problem that the remote control cannot be performed because the synchronization relationship is deviated.

Therefore, the operation switch is repeatedly operated until the identification code transmitted from the transmission circuit on the remote key side coincides with the identification code waiting for verification in the receiving device on the vehicle side, or the synchronization relationship is restored. Alternatively, when the receiving code from the receiving device on the vehicle body matches the identification code waiting for verification, a response signal may be transmitted to the remote key side in order to change the identification code. There is a problem in that the operation of the remote key for taking the operation becomes extremely troublesome, or both the remote key and the vehicle body side need to have a transmitting / receiving function, which complicates the configuration.

The present invention has been made in view of the above circumstances, and an object thereof is a vehicle capable of reliably preventing an illegal act due to interception of an airborne signal from a remote key while having a simple and inexpensive structure. It is to provide a remote control device of a load for use.

[0010]

A remote control device for a vehicle load according to the present invention has an operating means, a key side storing means for storing a plurality of identification codes, and a clock function, and the operating means is operated. Then, a transmission count value output means for outputting a transmission time count value corresponding to the operation time, and the transmission time meter output from the transmission count value output means from a plurality of identification codes stored in the key side storage means. An identification code output means for reading and outputting an identification code corresponding to a numerical value, and an identification code output from the identification code output means is added with the time count value output from the transmission count value output means to generate a code signal. A remote key having a transmitting means for generating and outputting this as an aerial propagation signal is provided, and a receiving means provided on the vehicle body side for receiving the aerial propagation signal; and the vehicle. And a vehicle body side storage means that is provided on the side and stores the same plurality of identification codes as the key side storage means, and a clock function that operates to indicate the same time as the clock function of the transmission count value output means. Receiving count value output means for outputting a reception time count value corresponding to the reception time when the code signal received by the reception means is input, and the code signal received by the reception means. Corresponding to the time count value collating means for collating the transmission time count value included and the reception time count value output from the reception count value output means, and the reception time count value output from the reception count value output means. Identification code collating means for collating the identification code read from the vehicle body side storage means with the identification code included in the code signal received by the receiving means, Having a time count reference means and said characterized in that both the comparison result of the identification code collating means which is configured by providing a receiving apparatus and a judging means for outputting a coincidence detection signal when they match.

[0011]

According to the remote control device for a vehicle load of the present invention,
On the remote key side, when the operation means is operated,
The transmission count value output means outputs the transmission time count value corresponding to the operation time, the identification code output means reads out the identification code corresponding to the transmission time count value from the key side storage means, and outputs it, and the transmission means: A code signal is generated from the transmission time count value and the identification code and is output as an air propagation signal.

On the other hand, on the receiving device side, when the air propagation signal is received by the receiving means, the reception count value output means outputs the reception time count value corresponding to the reception time, and the time count value collating means, The transmission time count value included in the code signal received by the receiving means is collated with the reception time count value output from the reception count value output means, and the identification code collating means receives the reception count value output means from the reception count value output means. The identification code read from the vehicle body side storage means corresponding to the time count value is collated with the identification code included in the code signal received by the reception means, and when the collation results are coincident, the discrimination means coincides with each other. The detection signal is output and the vehicle load is driven.

As a result, the code signal and the time count value transmitted by the air propagation signal are momentarily changed between the remote key and the receiving device, and even if the wire is intercepted illegally, the legitimate code signal and the time count value can be changed. Even if the user tries to perform an illegal act with the intercepted code signal after the user is absent, the receiving device does not accept it because of the time limitation, and the safety is improved.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 3 shows an outline of the entire configuration. The remote key 1 is composed of a key plate 2 and a key grip 3 supporting the key plate 2. The key grip 3 is provided with an operation button 4 as an operation means, and the inside thereof is provided. A transmission circuit 5 is provided. Then, as will be described later, when the operation switch 4 is operated, the transmission circuit 5 transmits a code signal including an ID code which is an identification code as a radio wave signal which is an air propagation signal.

The receiving device 6 provided on the vehicle side is adapted to receive an aerial propagation signal via an antenna 7, and its input terminal is provided with an IG provided on an ignition key cylinder (not shown). The key position switch 8 and the IG key ACC switch 9 are connected so that a key insertion detection signal is input and an ignition ACC rotation position detection signal is input. Further, to the input terminal of the receiving device 6, a door courtesy switch 10 for detecting opening / closing of a door is connected, and a preset switch 11 is connected.

On the other hand, at the output terminal of the receiver 6, a door lock device 12 for electrically driving a door lock mechanism (not shown) and an alarm device 1 for performing a notification operation.
3 are connected, and each of them is operated according to a control signal given from the receiving device 6.

FIG. 1 shows the electrical configuration of the transmission circuit 5 provided on the remote key 1 side. That is, in the switch circuit 14, the battery 15 is connected to the power supply input terminal thereof, and the operation switch 4 is connected to the input terminal thereof. When the operation switch 4 is turned on, the start control signal is output from the control output terminal. And the DC power supply voltage of the battery 15 is output from the power supply output terminal as the control power supply voltage for each circuit. The control output terminal of the switch circuit 14 is connected to each control input terminal of the clock circuit 16, the transmission code shift register 17, and the oscillation circuit 18.

The clock signal output terminal of the clock circuit 16 is connected to the clock signal input terminal of the transmission code shift register 17, and when the start control signal is given from the switch circuit 14, it outputs a clock signal of a predetermined frequency. It has become. In the key-side memory 19 as the key-side storage means, the ID code C as the identification code is stored as a different value in each storage area designated by the address value corresponding to the value of the unit time count value N1. As the ID code C, a value unique to each vehicle is stored as a 20-bit digital signal value, for example.

The transmission code shift register 17 comprises a time counting shift register 17a, a unit time counting shift register 17b and an ID code shift register 17c. Then, the time counting shift register 17a
Is internally provided with a clock function, and when a start control signal is given from the switch circuit 14, the transmission time count value T1 corresponding to the operation time is generated, and the unit time count shift register 17b outputs the transmission time count value T1. A transmission unit time count value N1 that is set by counting at unit time intervals (for example, in units of 1 minute) is generated.

In this case, the unit time counting shift register 1
The data output terminal 7b is connected to the address designation terminal of the key side memory 19 and designates an address value determined by the transmission unit time count value N1. The data output terminal of the key side memory 18 is connected to the data input terminal of the ID code shift register 17c so that the data of the ID code C of the address value input to the address designation terminal is output to the ID code register 17c. It has become.

Then, the transmission code shift register 17
Is a transmission time count value T, a transmission unit time count value N and I every time a clock signal is given from the clock circuit 16.
Each data of the D code C is made into one code signal CD, and the contents of each bit are sequentially shifted and output from the output terminal. The output terminal is connected to the modulation input terminal of the modulation circuit 20 as the transmitting means. It is connected.

The above transmission code shift register 1
7, the time count shift register 17a and the unit time count shift register 17b correspond to the transmission count value output means referred to in the present invention, and the ID code shift register 17c corresponds to the identification code output means referred to in the present invention. Is equivalent to.

The modulation circuit 20 has its carrier wave input terminal connected to the output terminal of the oscillation circuit 18, and its output terminal connected to the antenna 22 via the output circuit 21 so that the predetermined frequency from the oscillation circuit 18 is reached. Is modulated by the code signal CD from the transmission code shift register 17, and this is transmitted from the antenna 22 via the output circuit 21 as a radio wave signal as an air propagation signal. Note that the antenna 22 actually uses the key plate 2 of the remote key 1.

FIG. 2 shows an electrical configuration of the receiving device 6 provided on the vehicle body side of an automobile, which is a vehicle. That is, the receiving circuit 23 demodulates the code signal from the radio wave signal received by the antenna 7 and outputs it as a received code signal from the output terminal.
4 and each of the input terminals of the waveform shaping circuit 25.

The power supply control circuit 24 has its power supply input terminal connected to the battery 26 of the automobile, and has a receiving circuit 23.
When a reception code signal is given from the battery, the power is supplied from the battery 26 and the control power supply voltage for each circuit is output from the power supply output terminal. Also, the waveform shaping circuit 2
Reference numeral 5 outputs the code signal CD transmitted from the transmission circuit 5 on the remote key 1 side as a reception code signal CD1 by shaping the waveform of the reception code signal from the reception circuit 23, and the output terminal thereof receives the signal. It is connected to the code shift register 27 and the received code detection synchronization circuit 28.

The reception code shift register 27 comprises a time counting shift register 27a, a unit time counting shift register 27b and an ID code shift register 27c, and transmits each data of the reception code signal CD1 inputted from the waveform shaping circuit 25. The time count value T1, the transmission unit time count value N1 and the ID code C1 are input to the shift registers 27a, 27b and 27c.

When the reception code signal CD1 is given from the waveform shaping circuit 25, the reception code detection synchronization circuit 28 outputs a control signal from the control output terminal.
The control output terminal is connected to the control input terminal of the clock circuit 29. The clock circuit 29 outputs the clock signal from the output terminal when the control signal is given from the reception code detection synchronization circuit 28, and the output terminal serves as the reception code shift register 27 and the reception count value output means. It is connected to each clock input terminal of the count value output circuit 30.

The reception code shift register 27 receives the clock signal from the clock circuit 28, and each time the clock signal is applied, the transmission time count value T1, T1 is sent from the time count shift register 27a, the unit time count shift register 27b, and the ID code shift register 27c. Transmission unit time count value N1
The contents of each bit of each data of the ID code C1 are sequentially shifted and output from the output terminal.

The count value output circuit 30 is composed of a time counting circuit 30a and a unit time counting circuit 30b, and is connected to the preset switch 11 described above. The data input terminal of the time counting circuit 30a is the time counting shift register 2 of the reception code shift register 27.
It is connected to the data output terminal of 7a, and the data of the transmission time count value T1 is input. Also,
This time counting circuit 30a has a clock function configured to indicate the same time as the clock function of the transmission code shift register 17 on the remote key 1 side, and when the clock signal is given from the clock circuit 29, its reception is performed. The reception time count value T2 corresponding to the time is generated and output to the unit time counting circuit 30b.

The preset switch 11 described above is
When the remote key 1 is operated while the code signal CD is being transmitted, the count value output circuit 3 is operated as described later.
0 time counting circuit 30a and unit time counting circuit 30b
In each of the above, the transmission time count value T1 and the reception time count value T2 of the received code signal CD1 are synchronized, and the transmission unit time count value N1 and the reception unit time count value N2
The preset operation is performed so as to match with.

The unit time counting circuit 30b generates a reception unit time counting value N2 set by counting the reception time counting value T2 given from the time counting circuit 30a at unit time intervals (for example, in units of 1 minute). , Its data output terminal is connected to one of the data input terminals of the unit time matching circuit 31 as the time counting and matching means, and is also connected to the address input terminal of the vehicle body side memory 32 as the vehicle body side storage means for receiving unit time. The data of the count value N2 is output.

In the vehicle body side memory 32, the ID code C2 as an identification code is stored as a different value in each storage area designated by the address value corresponding to the value of the reception unit time count value N2. The ID code C2 is the same data as the ID code C1 stored in the key side memory 19, and therefore the transmission unit time count value N
If the address value of the reception unit time count value N2 equal to 1 is designated, the same ID code C2 as the transmitted ID code C1
Is read.

The unit time matching circuit 31 has the other data input terminal connected to the data output terminal of the unit time count shift register 27b, and has a transmission unit time count value N1.
Data will be input. Then, the unit time matching circuit 31 uses the unit time counting shift register 27.
When the unit time count value N1 given by b and the received unit time count value N2 given by the unit time counting circuit 30b are collated and coincident with each other, a unit time coincidence signal is output, and its output terminal is an identification code. ID as verification means
It is connected to the control input terminal of the code matching circuit 33.

One of the data input terminals of the ID code collating circuit 33 is connected to the data output terminal of the vehicle body side memory 32 and the address value (reception unit time counting value N2) designated by the unit time counting circuit 30b is obtained. Corresponding ID
The data of the code C2 is input, and the other data input terminal is the ID code shift register 2
Received code CD connected to the data output terminal of 7c
The ID code C1 included in 1 is input.

When the unit time matching circuit 31 gives the unit time matching signal, the ID code matching circuit 33 matches the ID code C1 from the ID code shift register 27c with the ID code C2 from the vehicle body side memory 32. However, when they match, a match detection signal is output, and the output terminal is the door lock control circuit 3
4 is connected.

As will be described later, the door lock control circuit 34 gives a lock signal or an unlock signal to the door lock device 12 when a coincidence detection signal as a control signal is given from the ID code collating circuit 33, so that the vehicle is not shown. By operating the door lock mechanism of the automobile as a service load, the door of the automobile is locked or unlocked.

Next, the operation of this embodiment will be described.
First, in use, when the operation switch 4 of the remote key 1 is turned on, the preset switch 11 of the receiving device 6 is operated to perform a preset operation to synchronize the two, that is, the time count value. T
1 and T2 are in a matched state, and the unit time count values N1 and N2 are set to the same count value.

In this case, the time count values T1 and T2 are set, for example, as count value data corresponding to the date and time corresponding to the calendar, and the unit time count values N1 and N2 are set.
Is set as count value data when the time count values T1 and T2 are counted in units of 1 minute from the preset time. Further, the ID codes C1 and C2 designated by the values of the unit time count values N1 and N2 are unique values set corresponding to the automobile, and are, for example, a finite number of different numbers such as 10 and 100. The values are set in correspondence with the unit time count values N1 and N2 in a predetermined relationship.

Now, when the operation switch 4 of the remote key 1 is turned on while the synchronization relationship between the remote key 1 and the receiving device 6 is established in this way, the switch in the transmission circuit 5 is switched. The circuit 14 supplies the DC power supply voltage supplied from the battery 15 to each circuit as a control power supply voltage, and also supplies a start control signal to the clock circuit 16, the transmission code shift register 17 and the oscillation circuit 18.

As a result, the transmission code shift register 1
7, the time counting shift register 17a generates the transmission time counting value T1, and the unit time counting shift register 17
b corresponds to the transmission time count value T1 and generates a transmission unit time count value N1 counted in units of, for example, 1 minute, and the ID code shift register 17c is an address designated from the key side memory 19 by the transmission unit time count value N1. Each time the ID code C1 stored in the value is read out and the clock signal is given from the clock circuit 16, each data of the transmission time count value T1, the transmission unit time count value N1 and the ID code C1 is treated as one code signal CD1. The contents of each bit are sequentially shifted and output to the modulation circuit 20.

Then, the modulation circuit 20 outputs the code signal CD
At 1, the carrier wave given from the oscillation circuit 18 is modulated, and this is transmitted as a radio wave signal from the antenna 22 via the output circuit 21.

On the other hand, in the receiving device 6, the code signal CD1 is transmitted via the antenna 7 and the receiving circuit 23.
When the output signal is received and the output signal is given to the power supply control circuit 24, the power supply control circuit 24 outputs the control power supply voltage, so that each circuit on the vehicle body side starts to operate.

That is, in the receiving device 6 on the vehicle body side, the code signal C input via the waveform shaping circuit 25.
D1 is input to the reception code shift register 27, the transmission time count value T1 of the code signal CD1 is given to the time count shift register 27a, and the transmission unit time count value N
1 is given to the unit time counting shift register 27b, and I
The D code C1 is given to the ID code shift register 27c and stored.

On the other hand, the code signal CD1 output from the waveform shaping circuit 25 is given to the clock circuit 29 via the reception code detection synchronizing circuit 28, whereby the time counting circuit 30a in the count value output circuit 30 is operated. The reception time count value T2 at that time is generated, and the unit time count circuit 30b generates the reception unit time count value N2 counted in units of 1 minute corresponding to the reception time count value T2. Then, the unit time counting circuit 30b outputs the data of the received unit time count value N2 and outputs it to the address input terminal of the vehicle body side memory 32 to specify the address value while outputting the unit time matching circuit 31.

In this case, the time counting circuit 30a includes the time counting shift register 2 of the reception code shift register 27.
When the transmission time count value T1 is given from 7a and the transmission time count value T1 and the reception time count value T2 at that time are within a predetermined error range, the internal clock function corresponds to the transmission time count value T1. It is equipped with a time adjustment function to match the time of day.

Now, in the unit time collation circuit 31,
The transmission unit time count value N1 input from the unit time count shift register 27b and the reception unit time count value N2 input from the unit time count circuit 30b are collated, and when they match, the unit time coincidence signal is ID code collated. Circuit 3
3 will be output.

In the ID code collating circuit 33, the ID code C1 included in the code signal CD1 already received from the ID code shift register 27c is input, and the address value of the reception unit time count value N2 is read from the vehicle body side memory 32. When the unit time collating circuit 31 gives a unit time coincidence signal, the ID code C1 and C2 are collated accordingly, and when they coincide, the door lock control circuit A coincidence detection signal is output to 34.

Then, the door lock control circuit 34 gives a lock signal or an unlock signal to the door lock device 12 to operate a door lock mechanism (not shown) to lock or unlock the door of the automobile. I will let you do it. In this case, when the door lock mechanism locks the door of the vehicle, the door lock control circuit 38 recognizes the coincidence detection signal as an unlock signal and outputs the door lock device 12 to unlock the door. In the state where the door lock mechanism unlocks the door, the coincidence detection signal is recognized as a lock signal and is output so that the door lock device 12 performs the lock operation.

Therefore, as described above, the remote key 1
The transmission unit time count value N1 of the code signal CD1 transmitted from the same matches the reception unit time count value N2, and the ID code C1 is an ID code read from the vehicle body side memory 32 in correspondence with the reception unit time count value N2. The coincidence detection signal is output to the door lock control circuit 34 only when C2 coincides, and the door lock mechanism is locked or unlocked. Therefore, if any of the values does not coincide, it is illegal. If the code signal is received, it will not be accepted.

Regarding the operation of the receiver 6 when the preset switch 11 is operated, the collating operation as described above is not performed, and the time counting circuit 30a and the unit time counting circuit 30b execute only the preset operation. It is like this.

Further, in this remote key system, the door lock device 12 is operated by performing the above collating operation.
When the lock operation is performed, the receiving device 6 sets the warning mode for theft prevention when it detects that all the doors are closed based on the detection signal from the door courtesy switch 10.

Although a detailed description is omitted, in the setting state of the warning mode, an alarm signal is output when the door courtesy switch 10 detects the opening operation of the door in order to prevent unauthorized intrusion from the outside. A notification operation is performed so as to abandon the illegal act by ringing a horn (not shown) or blinking a light.

In this remote key system,
The determination whether the key inserted in the ignition key cylinder is the regular remote key 1 is made based on the code signal CD1 transmitted from the transmission circuit 5, and the IG key position switch 8 is If the regular code signal CD1 is input during the period from the detection of the insertion of the key plate 2 of the remote key 1 to the detection of the turning operation of the IG key ACC switch 9 to the ACC position, the engine start is permitted. It is designed to do.

As described above, in this embodiment, when the operation switch 4 is operated on the remote key 1 side, the transmission time count value T1, the transmission unit time count value N1 and the ID code corresponding to the transmission time count value T1 When C1 is read from the key side memory 19, a code signal CD1 is generated and transmitted as a radio wave signal, and the receiving device 6 side receives the code signal CD1, the reception time count value T2 at the time of reception, the reception unit time counter The numerical value N2 is generated, the ID code C2 corresponding to the reception unit time count value N2 is read from the vehicle body side memory 32, and the unit time comparison circuit 31 compares the transmission unit time count value N1 with the reception unit time count value N2. Unit time match signal is output when
In response to this, the ID code collating circuit 33 collates the ID codes C1 and C2 and outputs a coincidence detection signal to the door lock control circuit 34 only when they coincide with each other.

As a result, the ID code C1 transmitted from the remote key 1 is changed every unit time (for example, every one minute), so that the radio signal including the ID code C1 is intercepted and the door is illegally locked. Even if it is attempted to be released, the intercepted ID code C1 will be changed after a lapse of a unit time, so that the illegal use cannot be easily performed and the safety is improved.

Further, the clock function of the transmission code shift register 17 of the remote key 1 and the clock function of the count value output circuit 30 of the receiving device 6 are operated in a state where the times are matched, and the transmission corresponding to the time is performed. Since the unit time count value N1 and the reception unit time count value N2 are collated to establish synchronization between them, unlike the rolling code system, without using a special configuration for synchronization, The synchronization can be easily maintained and the safety can be improved.

On the receiving device 6 side, based on the transmission time count value T1 transmitted from the remote key 1 side,
Since the time adjustment function is provided so that the time counting circuit 30a adjusts and adjusts the time, even if there is a slight error in the clock function between the two, it is immediately corrected and always synchronized. Can hold a relationship.

In the above embodiment, the ID code C1, C2 is set to a finite number and the unit time count values N1, N2 are set.
Although it is configured to be used repeatedly by being associated with a predetermined relationship corresponding to 2, the present invention is not limited to this, and a configuration may be used in which a large number of ID codes are stored and set and used only once for each transmission. In this case, for example, about 100,000 different IDs
If you set the code in advance, even if you use the ID code about 20 times a day, it will take about 13 years until the entire ID code is used up. It is a possible level.

Further, in the above embodiment, the case where the value counted in the predetermined time unit according to the time count values T1 and T2 is used as a reference with respect to the preset time of the unit time count values N1 and N2 has been described. The count value may be cyclically used as a finite number, for example, the number corresponding to the number of ID codes C1 and C2.

Further, in the above-mentioned embodiment, the case where the count unit time of the unit time count values N1 and N2 is set to 1 minute has been described, but the present invention is not limited to this, for example, every 5 minutes or 10 minutes, 1 hour. The unit time of can be set.

In the above embodiment, the configuration in which both the time count value T and the unit time count value N are used as the data added to the ID code has been described, but the present invention is not limited to this, and only one of them is used. May be added for use. When only the time count value T is used, the same operational effect can be obtained by taking into account the time error of the clock function between the remote key 1 and the receiving device 6 within the allowable time error range. Obtainable.

In the above embodiment, the operation of the time adjusting function in the receiving device 6 is executed at the time when the code signal CD is received from the remote key 1, but not limited to this, for example, at the time of reception. It is also possible to store the transmission time count value T1 in step 1 and execute it at a timing such as when the remote key 1 is inserted in the ignition key cylinder.

Further, in the above embodiment, the clock function used between the remote key 1 and the receiving device 6 does not necessarily have to be set to the standard time, and a clock function for measuring the same time between them is used. If it does, it can operate sufficiently.

In the above-described embodiment, the operation of locking and unlocking the door lock mechanism is performed by one operation button 4 on the remote key side. Instead, however, the operation switch for locking and the unlock switch are used as the operation means. The lock operation switch may be separately provided.

Further, in the above-mentioned embodiment, the transmission circuit 5 of the remote key 1 is provided with a battery consumption signal code for notifying the consumption state of the battery 15 to the code signal when transmitting the code signal for the predetermined number of times, When the receiving device 6 receives this, the alarm device 13 may notify the user to prompt the user to replace the battery 15 of the remote key 1.

Further, although the door lock mechanism is provided as the vehicle load in the above embodiment, an engine starting device, a window opening / closing mechanism, etc. may be provided instead.

In addition, the present invention is not limited to the above-mentioned embodiments, and for example, the airborne signal may be an ultrasonic signal or an infrared signal, and may be appropriately modified without departing from the scope of the invention. Of course, it can be carried out.

[0068]

The remote control device for a vehicle load according to the present invention comprises:
As described above, on the remote key side, the transmission count value output means outputs the transmission time count value corresponding to the operation time according to the operation of the operation means, and the identification code output means outputs the transmission time count value. The identification code corresponding to is read out from the key side storage means and output, and the transmitting means generates a code signal from the transmission time count value and the identification code and outputs it as an aerial propagation signal. When the airborne signal is received by the reception means, the reception count value output means outputs the reception time count value corresponding to the reception time, and the time count value comparison means transmits the reception signal included in the code signal received by the reception means. The time count value is collated with the reception time count value output from the reception count value output means, and the reception count value output means is operated by the identification code collating means. Corresponding to the output reception time count value, the identification code read out from the vehicle body side storage means and the identification code included in the code signal received by the reception means are collated, and when the collation results match, The determination means outputs the coincidence detection signal to drive the vehicle load.

As a result, the code signal and the time count value transmitted by the airborne signal are momentarily changed between the remote key and the receiving device, and even if the wire is intercepted illegally, the legitimate code signal can be obtained. Even if the user tries to perform an illegal act with the intercepted code signal after the user is absent, the receiving device does not accept it because of the time limitation, and the excellent effect of improving the safety is achieved.

[Brief description of drawings]

FIG. 1 is an electrical block diagram of a receiving device according to an embodiment of the present invention.

FIG. 2 is an electrical block diagram of a transmitter circuit on the remote key side.

FIG. 3 is a block configuration diagram showing an outline of the overall configuration.

[Explanation of symbols]

1 is a remote key, 4 is an operation switch (operation means), 5
Is a transmitting circuit, 6 is a receiving device, 7 is an antenna, 11 is a preset switch, 12 is a door lock device (vehicle load), 13 is an alarm device, 14 is a switch circuit, 15
Is a battery, 16 is a clock circuit, 17 is a transmission code shift register, 17a is a time count shift register (transmission count value output means), 17b is a unit time count shift register (transmission count value output means), and 17c is an ID code shift register. (Identification code output means), 18 is an oscillation circuit, 19
Is a key side memory (key side storage means), 20 is a modulation circuit,
21 is an output circuit, 22 is an antenna, 23 is a receiving circuit, 2
4 is a power supply control circuit, 25 is a waveform shaping circuit, 26 is a battery, 27 is a received code shift register, 28 is a received code detection synchronization circuit, 29 is a clock circuit, 30 is a count value output circuit (reception count value output means), 30a is a time counting circuit, 30b is a unit time counting circuit, 31 is a unit time collating circuit (time counting collating means), 32 is a vehicle body side memory (vehicle body side storing means), and 33 is an ID code collating circuit (identification code collating means). , 34 are door lock control circuits.

Claims (1)

[Claims] 1. A remote control device for a vehicle load, comprising: a remote key of (a) below; and a receiving device of (b) below. (A) Operation means, key side storage means for storing a plurality of identification codes, and a clock function, and when the operation means is operated, a transmission count value that outputs a transmission time count value corresponding to the operation time Output means, and an identification code output means for reading out and outputting an identification code corresponding to the transmission time count value output from the transmission count value output means from a plurality of identification codes stored in the key side storage means, A remote key provided with a transmission means for generating a code signal by adding the time count value output from the transmission count value output means to the identification code output from the identification code output means and outputting the code signal as an airborne signal. . (B) Receiving means provided on the vehicle body side for receiving the aerial propagation signal, and vehicle body side storage means provided on the vehicle body side and storing the same plurality of identification codes as the key side storage means A clock function that operates to indicate the same time as the clock function of the transmission count value output means, and when the code signal received by the reception means is input, a reception time counter corresponding to the reception time Reception count value output means for outputting a numerical value, and a time counter for collating the transmission time count value included in the code signal received by the reception means with the reception time count value output from the reception count value output means. Numerical value collating means, an identification code read from the vehicle body side storage means corresponding to the reception time count value output from the reception count value output means, and the code received by the receiving means. An identification code collating means for collating the identification code included in the read signal, and a determining means for outputting a coincidence detection signal when the collation results of both the time count value collating means and the identification code collating means coincide. Equipped receiver.