JPH08193443A - Remote control device of door lock mechanism for vehicle - Google Patents

Abstract

PURPOSE: To enhance convenience in use by preventing a synchronous difference in an ID code between the radio wave key side and the receiver side of an automobile in a rolling code system to the possible minimum level. CONSTITUTION: In a radio wave key, when operation switches 4 and 5 are operated, electric power is supplied to respective parts of a transmission circuit 6 from a battery 16, and a shift register 18 outputs an ID code and a switch code, and transmits them from an antenna 27. At this time, a switch code discriminating circuit 21 renews and stores an increment code when a last time switch code is an unlocked code and this time switch code is a lock code. Since the increment code is similarly renewed with every reception even on the receiver side, the occurrence of a synchronous difference can be prevented better to the possible minimum level than when it is renewed every time.

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 a vehicle door lock mechanism in which a drive device for a door lock mechanism provided in a vehicle is operated by remote control.

[0002]

2. Description of the Related Art Conventionally, as this type, there is one used as a radio wave key of an automobile. This is because the transmitter is built in the key grip part that holds the mechanical key, and when either the lock switch or unlock switch provided on the surface of the key grip is operated, the code corresponding to this is sent. The signal is configured to be transmitted as a radio signal.

Then, when the ID code included in the received radio wave signal corresponds to itself by the receiving device provided on the automobile side, that is, the received ID code corresponds to the ID code stored inside. When they match, the door lock mechanism is locked or unlocked in accordance with the operation code signal included in the radio signal. As a result, the user does not have to insert the key plate into the key cylinder of the door each time and perform a turning operation, which is excellent in usability.

In this case, in recent years, in order to enhance the concealment of signal transmission / reception between the radio wave key side and the automobile side and improve the safety, for example, a plurality of ID codes are set in both sides, and these are set. By changing the setting of the code signal cyclically on both the radio wave key side and the receiving device side every time the lock switch and the unlock switch are operated,
There is provided a device in which the unlocking operation cannot be performed even if the immediately preceding ID code is transmitted again.

[0005]

However, the conventional structure as described above has the following inconvenience in use. That is, in such a radio wave key, a one-way communication system is basically used in which only the code signal is transmitted and the receiving operation is not performed. Therefore, in the rolling code type ID code as described above, in the internal circuit on the radio wave key side, the ID code is sequentially changed and set irrespective of whether or not the receiving side receives the signal.

In the receiving device, the ID code is sequentially changed and set every time the transmission signal from the radio wave key is received, so that the reception device is synchronized with the radio wave key side.
When the transmission signal from the radio wave key cannot be received, the ID code on the receiving side is not changed and set, and only the ID code of the radio wave key is changed and set. As a result, when the radio wave key is used next time, the synchronization state is deviated between the radio wave key side and the receiving device side, so that the ID code included in the transmission signal from the radio wave key side does not match on the receiving device side. Therefore, the lock operation or the unlock operation cannot be performed. Then, it is necessary to repeatedly operate the lock switch or the unlock switch of the radio wave key until the ID code on the receiving device side matches, that is, until the registered ID code makes one round to the original ID code. As a result, there is a problem that usability deteriorates.

The present invention has been made in view of the above circumstances, and an object thereof is to improve usability by preventing the deviation of the synchronization state from occurring as much as possible in a configuration in which confidentiality is enhanced by a rolling code method in one-way communication. (EN) Provided is a remote control device for a vehicle door lock mechanism.

[0008]

According to the present invention, there is provided a transmitter for transmitting a lock or unlock airborne signal in response to an operation of an operation switch, and an airborne signal provided in a vehicle for receiving the airborne signal from the transmitter. The present invention is directed to a remote control device for a vehicle door lock mechanism including a receiving device that locks or unlocks a door lock mechanism in accordance with this, and the transmitter is unique to the vehicle. A unique code storing means for transmitting, which stores a plurality of unique codes set to, a transmitting operation code storing means for storing a locking or unlocking operation code when the operation switch is operated, When the switch is operated, the designated unique code of the plurality of unique codes of the transmitting side unique code storage means is read out and A transmitting means for outputting the operation code of the operation as an operation signal; and when the operation switch is operated, the operation code stored at the time of the last operation of the operation switch is read from the transmitting side operation code storing means and the operation code is read. And a transmitting side code designating means for changing and setting a unique code to be designated in the transmitting side unique code storage means when the operation code is different from the current operation code, and the receiving device is configured to store the unique code on the transmitting device side. Receiving side unique code storage means storing a plurality of unique codes similar to the means, and collating means for collating the received unique code of the air propagation signal with the unique code specified in the receiving side unique code storage means. And when the matching signal is output from the matching means, the door lock mechanism is driven and controlled according to the operation code received at that time. And control means for,
Receiving side operation code storage means for storing the received operation code, and the receiving side unique code when the operation code at the previous reception stored in the receiving side operation code storage means differs from the received operation code The present invention is characterized in that it is configured by including receiving side code designating means for changing and setting a unique code to be designated in the storage means (the invention of claim 1).

Further, when the operation code of this time corresponds to the unlock operation and the operation code of the previous time corresponds to the lock operation, the change setting operation of the unique code is performed by the transmitting side and the receiving side code designating means. It can also be configured to do so (the invention of claim 2).

A plurality of unique codes stored in the transmitting side unique code storage means and the receiving side unique code storage means are added to one identification code set corresponding to the vehicle. It is preferable that the specific code is composed of a predetermined number of increment codes to be changed, and the change setting of the unique code is performed by cyclically changing and designating the increment code (the invention of claim 3).

Further, the sending side unique code storage means and the receiving side unique code storage means can be constituted by a non-volatile memory (the invention of claim 4).

In addition, the operation code storage means on the transmission side and the operation code storage means on the reception side can be constituted by a non-volatile memory (the invention of claim 5).

[0013]

According to the remote control device for a vehicle door lock mechanism of the present invention, in the transmitting device, when the operation switch of the transmitting device is operated, the transmitting means is designated from the transmitting side unique code storing means. The unique code is read out and a lock or unlock operation code corresponding to the operation of the operation switch at that time is transmitted as an operation signal by an air propagation signal.

At the same time, when the operation switch is operated, the operation code is stored in the transmission side operation code storage means, and the transmission side code designating means reads the previous operation code from the transmission side operation code storage means. If the operation code differs from the current operation code, that is, if the operation code of the previous time and the operation code of this time are a combination of lock and unlock, the unique code to be specified in the sender unique code storage means is changed and set. Become. Therefore,
The designation of the unique code is changed and set only when the operation code alternately performs the lock and unlock operations.

On the other hand, in the receiving device, when the receiving means receives the aerial propagation signal, the matching means matches the unique code included in the signal with the unique code specified in the receiving unique code storage means. When the coincidence signal is output, the control means drives and controls the door lock mechanism so as to perform the lock operation or the unlock operation according to the operation code at that time. At the same time, the receiving side code designating means reads the previously received operation code from the receiving side operation code storage means and determines whether or not it is different from the operation code received this time. The unique code to be specified in will be changed and set.

As a result, the unique code designation changing operation is performed only when the operation switches on the transmitter side are alternately operated. Therefore, when the same operation by the operation switches is inadvertently repeated, the unique code is designated. Since the change operation is not performed, it is possible to prevent the synchronization state with the receiving device on the vehicle side from being broken as much as possible, and it is possible to improve the usability while improving the reliability. Like

According to another aspect of the remote control device for a vehicle door lock mechanism of the present invention, both of the transmitting side code designating means and the receiving side code designating means are set as the conditions for performing the unique code designation changing operation. Since it is assumed that the received operation code corresponds to the unlock operation and the operation code of the times corresponds to the lock operation, it is necessary to minimize the number of unique code specification change operations to break the synchronization state. It can be prevented as much as possible.

In this case, when the vehicle door lock mechanism is unlocked, the unique code used when the vehicle door lock mechanism is locked is always changed, and the new changed unique code is not received. In that case, unlocking cannot be performed.On the other hand, when locking, it is possible to use the unique code used before unlocking on the safe side because it can be operated on the safe side. Will not be invited.

According to another aspect of the remote control device for a vehicle door lock mechanism of the present invention, a plurality of unique codes include one unique identification code set corresponding to the vehicle and a predetermined number of increment codes. Since it is configured by combining, it is not necessary to set multiple unique codes for each vehicle, so it is possible to save the memory capacity for storing it, and the increment code can be set to any number within an appropriate range. Since it can be set, it is also highly confidential.

According to the vehicle door lock mechanism remote control device of the fourth aspect, since the unique code is stored in the non-volatile memory, the stored state can be retained even after the power is cut off. Therefore, the safety can be further improved.

According to the remote control device for a vehicle door lock mechanism of the present invention, since the operation code is stored in the non-volatile memory, the stored state can be maintained even after the power is cut off. Therefore, the safety can be further improved.

[0022]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment in which the present invention is applied to a radio wave key of an automobile will be described below with reference to the drawings.
FIG. 2 shows a schematic electrical configuration. A radio wave key 1 as a transmitter comprises a key plate 2 and a key grip 3 supporting the key plate 2, and the key grip 3 has a lock switch 4 and an operation switch. An unlock switch 5 is provided, and a transmission circuit 6 is provided inside. Then, as will be described later, when the lock switch 4 or the unlock switch 5 is operated, the transmission circuit 6
Transmits a code signal including an ID code, which is an identification code, as a radio wave signal that is an air propagation signal.

An antenna 9 is connected to a receiving device 7 provided on the vehicle body side of an automobile through a receiving circuit 8.
When receiving an aerial radio signal, it is converted into an electric signal and input to the receiving device 7. Receiver 7
Has a collating means, a control means, and a receiving side code designating means, and is composed of a microcomputer and the like, and is adapted to perform a control operation described later according to a reception control program. An IG key position switch 10 and an IG key AC provided on an ignition key cylinder (not shown) are connected to input terminals of the receiving device 7.
The C switch 11 is connected so that a signal for detecting the insertion of a key into the ignition key cylinder is input and a signal for detecting the ACC rotation position of the ignition is also input. A door courtesy switch 12 that detects opening and closing of the door is connected to an input terminal of the receiving device 7.

The receiving device 7 is connected to a drive circuit 13a so as to control the locking operation or the unlocking operation of the door lock mechanism 13 based on a signal received from the outside. The EEPROM 14, which is an electrically rewritable non-volatile memory, has a function as a receiving side unique code storage means and a function as a receiving side operation code storage means. It is stored as an ID code and an increment code, which are the identification code of.

When the lock signal or the unlock signal transmitted from the radio wave key 1 is input through the antenna 9 and the receiving circuit 8, the receiving device 7 receives the EEP, as will be described later.
The ID code and the increment code stored in the ROM 14 are collated with each other, and if they match with each other, an operation corresponding to the operation code at that time is performed on the door lock mechanism 13.

In FIG. 1, which shows the electrical configuration of the transmission circuit 6 of the radio wave key 1, the switch circuit 15 has a battery 16 connected to the power input terminal thereof, and the lock switch 4 and the unlock circuit described above connected to the input terminal thereof. When the switch 5 is connected and the switches 4 or 5 are operated, a start control signal is output from the control output terminal and the DC power supply voltage of the battery 16 is output from the power supply output terminal as the control power supply voltage of each circuit. It is supposed to do. The control output terminal of the switch circuit 15 has a clock circuit 17, a transmission code shift register 18, an oscillation circuit 19, a switch discrimination circuit 20, a switch code discrimination circuit 21 and an EE.
It is connected to each input terminal of PROM22 and ROM23. It should be noted that the EEPROM 22 and the ROM 23 also have functions as a transmission side unique code storage means and a transmission side operation code storage means.

In the clock circuit 17, its clock signal output terminal is connected to the clock signal input terminal of the transmission code shift register 18, and when the start control signal is given from the switch circuit 15, it outputs a clock signal of a predetermined frequency. It has become. The transmission code shift register 18 is the increment code shift register 18
a, ID code shift register 18b and switch code shift register 18c, and shifts each digital code signal input as will be described later in accordance with a clock signal provided from the clock circuit 17. Then, the switch code shift register 18c is the increment code shift register 18c.
a, the digital code signal sequentially shifted from the ID code shift register 18b and given to the code conversion circuit 2
It is designed to output to 4.

The code conversion circuit 24 is adapted to convert the digital code signals sequentially applied from the transmission code shift register 18 into transmission signals and output them to the modulation circuit 25. The modulation circuit 25 modulates a carrier wave of a predetermined frequency given from the oscillation circuit 19 with a transmission signal given from the code conversion circuit 24, and outputs it as a radio wave signal as an air propagation signal from an antenna 27 via an output circuit 26.

The switch discriminating circuit 20 is connected to the lock switch 4 and the unlock switch 5, and discriminates when any one of them is operated and discriminates a discrimination signal to the switch code discriminating circuit 21 and the ROM 23. It is designed to give. The switch code discriminating circuit 21 as the transmission code designating means is the switch discriminating circuit 2
The switch code given from 0 is stored in the EEPROM 22, and the previously stored switch code is read out to judge whether or not the designation change operation of the increment code stored in the EEPROM 22 is performed based on the both codes. Has become.

When the EEPROM 22 receives the control signal from the switch circuit 15, it outputs the increment code stored therein to the increment code shift register 18a. The ROM 23 has a switch circuit 15
When a control signal is given from the
The D code is output to the ID code shift register 18b, and the corresponding lock code or unlock code is output to the switch code shift register 18c based on the signal from the switch discrimination circuit 20.

In the receiving device 7, the radio wave key 1
A circuit having a configuration similar to that of the transmission circuit 6 is provided, and the received code signal is determined as described later.

Next, the operation of this embodiment will be described with reference to the flowchart of FIG. The radio wave key 1 executes the transmission control program of the flowchart shown in FIG. 3 in the internal transmission circuit 6 to determine whether the lock switch 4 or the unlock switch 5 has been operated.

First, the case where the lock switch 4 is operated will be described. That is, in the transmission circuit 6,
In step S1, it is determined to be "YES" and step S2.
The switch code discrimination circuit 21 advances to EEPR.
The ID code, the increment code, and the previous switch code are read from the OM 22 and the ROM 23. On the other hand, in the transmission code shift register 18, when the increment code, the ID code and the current switch code are given from the EEPROM 22 and the ROM 23 (step S3), the digital signal is sequentially shifted based on this and given to the code conversion circuit 24. Then, the modulation circuit 25 modulates a carrier wave of a predetermined frequency provided from the oscillation circuit 19 to generate a transmission signal.
The signal 6 is transmitted and output as a radio signal from the antenna 6 through the antenna 27 (step S4).

Next, the switch code determining circuit 21 determines whether or not the previous switch code was the unlock code (step S5), and if the result is "NO",
That is, when the previous switch code is the lock code, the transmission control program is terminated as it is, and the process returns to step S1. When it is determined "YES", the process proceeds to step S6. In step S6, the switch code determining circuit 21 performs a writing process to the EEPROM 22 as a value obtained by adding the increment code by “1”, and performs an increment code designation changing operation. After this, the switch code discrimination circuit 21
Writes the lock switch code corresponding to the lock switch 4 operated this time to the EEPROM 22 (step S7), ends the program, and ends the program in step S7.
I will come back to 1. The switch code written in the EEPROM 22 will be read as the previous switch code in step S2 when the program is executed next time.

As a result, the transmission signal corresponding to the lock switch code is transmitted from the radio wave key 1 as a radio wave signal together with the ID code and the increment code. In the receiving device 7, when the radio signal is received from the antenna 27 through the receiving circuit 25, the ID code and the increment code are collated, and when the collation result is coincident, it is driven according to the lock switch code included therein. The door lock mechanism 13 is caused to perform a locking operation via the circuit 13a. Further, at this time, the receiving device 7 sets the previous switch code to the EEPROM 14
If the switch code is an unlock switch code, the increment code stored in the EEPROM 14 is incremented by "1" to change the designation.

Next, the unlock switch 5 of the radio wave key 1
If is operated, it is determined to be “YES” in step S8, and the process proceeds to step S9. In step S9, the switch code discrimination circuit 21 is used to read data from the EEPROM 22 and the ROM 23 in the same manner as described above.
The D code, the increment code, and the previous switch code are read out, and subsequently, in step S10, the transmission code shift register 18 sets the increment code, the ID code, and the current switch code to EEPR.
The data is read from the OM 22 and the ROM 23, generated as an operation code signal, and transmitted from the antenna 27 as a radio wave signal via the code conversion circuit 24, the modulation circuit 25, etc. (step S11).

Next, the switch code determining circuit 21 determines whether or not the previous switch code was the lock code (step S12), and if the result is "NO", that is, the previous switch code is the unlock code. If it is, the transmission control program is terminated as it is and the process returns to step S1. If it is determined to be "YES", the process proceeds to step S13. In step S13, the switch code determination circuit 21 writes the unlock switch code corresponding to the unlock switch 5 operated this time into the EEPROM 22, ends the program, and returns to step S1. In addition,
The switch code written in the EEPROM 22 will be read as the previous switch code in step S2 when the program is executed next time.

As a result, the transmission signal corresponding to the lock switch code is transmitted from the radio wave key 1 as a radio wave signal together with the ID code and the increment code. In the receiving device 7, when the radio signal is received from the antenna 27 via the receiving circuit 25, the ID code and the increment code are collated, and when the collation results match, the unlock switch code included in the collation result is received. Door lock mechanism 13 via drive circuit 13a
To unlock.

According to the present embodiment as described above, a code which is a combination of an ID code and an increment code is set as a plurality of unique codes, and the switch code discrimination circuit 21 unlocks the increment code from the previous switch code. Only when the code and the switch code this time are lock codes, the specification is changed by adding "1". Therefore, when unlocked, the increment code is always changed and set. In other cases, since it is held in the state where the increment code is set as it is, the lock switch 4 of the radio wave key 1 is kept while maintaining the high security when unlocking the door lock mechanism. Receiver 7 side that occurs when the unlock switch 5 is operated carelessly Utmost becomes possible to prevent the synchronization of the displacement of, thereby enhancing usability.

Further, according to this embodiment, since the ID code and the increment code are combined to generate a plurality of unique codes, it is not necessary to set and store a plurality of unique codes corresponding to the vehicle, and one unique code is used. ID
It can be configured by setting a code and an increment code within a predetermined range, and therefore the storage capacity for storing the unique code can be reduced.

According to this embodiment, the EEPROM 2 stores the increment code and the switch code.
Since the memory state is retained even when the power is cut off, the operation can be resumed in the same state as before the power was cut off, so that the safety can be improved. it can.

The present invention is not limited to the above embodiment, but can be modified or expanded as follows. As the plurality of unique codes, not only the combination with the increment code but also a plurality of ID codes corresponding to the vehicle may be set and stored.

[0043]

As is apparent from the above description, according to the remote control device for the vehicle door lock mechanism of the present invention, the following effects can be obtained. That is, according to the remote control device of the vehicle door lock mechanism of the first aspect, the operation for changing the designation of the unique code is performed only when the operation switch on the transmission device side is alternately operated. When the same operation by the switch is inadvertently repeated, the operation of changing the designation of the unique code is not performed, and it is possible to prevent the synchronization state with the vehicle side receiving device from being broken as much as possible. Therefore, it has an excellent effect that the usability can be improved while improving the reliability.

According to the remote control device for the vehicle door lock mechanism of the second aspect, both the transmitting side code designating means and the receiving side code designating means are set as conditions for performing the designation changing operation of the unique code. Since it is assumed that the received operation code corresponds to the unlock operation and the operation code of the times corresponds to the lock operation, it is necessary to minimize the number of unique code specification change operations to break the synchronization state. It has an excellent effect that it can be prevented as much as possible.

According to the remote control device of the vehicle door lock mechanism of the third aspect, a plurality of unique codes are provided, one unique identification code set corresponding to the vehicle and a predetermined number of increment codes. Since it is configured by combining, it is not necessary to set multiple unique codes for each vehicle, so it is possible to save the memory capacity for storing it, and the increment code can be set to any number within an appropriate range. This has an excellent effect that it can be set and the confidentiality can be improved.

According to the vehicle door lock mechanism remote control device of the fourth aspect, since the unique code is stored in the non-volatile memory, the stored state can be maintained even after the power is cut off. Therefore, the excellent effect that the safety can be further improved can be obtained.

According to the remote control device for a vehicle door lock mechanism of the fifth aspect, since the operation code is stored in the non-volatile memory, the stored state can be maintained even after the power is cut off. Therefore, the excellent effect that the safety can be further improved can be obtained.

[Brief description of drawings]

FIG. 1 is an electrical configuration diagram of a radio wave key showing an embodiment of the present invention.

FIG. 2 is an electrical configuration diagram of a receiving device.

FIG. 3 is a flowchart illustrating an operation when a transmission code is output.

[Explanation of symbols]

1 is a radio wave key, 2 is a key plate, 3 is a key grip,
Reference numeral 4 is a lock switch (operation switch), 5 is an unlock switch operation switch, 6 is a transmission circuit, 7 is a receiving device (verifying means, control means, receiving side code designating means), 13
Is a door lock mechanism, 13a is a drive circuit, and 14 is EEPR
OM (reception side operation code storage means, non-volatile memory),
Reference numeral 15 is a switch circuit, 16 is a battery, 18 is a transmission code shift register, 19 is an oscillation circuit, 20 is a switch discrimination circuit, 21 is a switch code discrimination circuit, and 22 is EEPRO.
M (transmission side operation code storage means, non-volatile memory), 2
3 is a ROM (transmission side operation code storage means, non-volatile memory), 24 is a code conversion circuit, 25 is a modulation circuit, 26 is an output circuit, and 27 is an antenna.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Ryuji Mizuno Noda No. 1 in Toyota, Oguchi-machi, Niwa-gun, Aichi Prefecture Tokai Rika Electric Co., Ltd. (72) Inventor Shinichi Koga Oguchi-machi, Niwa-gun, Aichi Prefecture Noda, Toyota No. 1 Tokai Rika Electric Co., Ltd.

Claims (5)

[Claims] 1. A transmitter for transmitting a lock or unlock airborne signal in response to operation of an operation switch,
In a remote control device for a vehicle door lock mechanism, which is provided in a vehicle, and includes a receiving device that operates a door lock mechanism to perform a locking operation or an unlocking operation when receiving an aerial propagation signal from the transmitting device, The transmission device includes a transmission-side unique code storage unit that stores a plurality of unique codes uniquely set to the vehicle, and a transmission that stores a lock or unlock operation code when the operation switch is operated. Side operation code storage means, and when the operation switch is operated, the specified unique code of the plurality of unique codes of the transmission side unique code storage means is read out and the current operation code is output as an operation signal. And a previous operation switch from the transmission side operation code storage means when the operation switch is operated. And a sending side code designating means for changing and setting the unique code to be designated in the sending side unique code storage means when the operation code stored at the time of the operation is read and the operation code is different from the current operation code. The receiving device includes a receiving-side unique code storage unit that stores a plurality of unique codes similar to the transmitting-device-side unique code storage unit, a unique code of the received airborne signal, and the receiving-side unique code storage unit. Collating means for collating with the unique code specified in, and control means for driving and controlling the door lock mechanism according to the operation code received at that time when a coincidence signal is output from the collating means, Receiving side operation code storage means for storing the received operation code, and storage in the receiving side operation code storage means for the received operation code A receiving side code designating means for changing and setting a unique code to be designated in the receiving side unique code storage means when the operation code at the time of the last reception is different. Remote control device. 2. The transmitting side and receiving side code designating means, when the current operation code corresponds to the unlock operation and the previous operation code corresponds to the lock operation, performs the change setting operation of the unique code. The remote control device for a vehicle door lock mechanism according to claim 1, which is performed. 3. A plurality of unique codes stored in the transmitting side unique code storage means and the receiving side unique code storage means are one identification code set corresponding to the vehicle and added thereto. 3. The remote control of the vehicle door lock mechanism according to claim 1 or 2, wherein the specific code is changed and set by cyclically changing and designating the increment code. Operating device. 4. The remote control device for a vehicle door lock mechanism according to claim 1, wherein the transmitting-side unique code storage means and the receiving-side unique code storage means are non-volatile memories. 5. The remote operation of the vehicle door lock mechanism according to claim 1, wherein the transmission side operation code storage means and the reception side operation code storage means are non-volatile memories. apparatus.