JPH0639858B2 - Wireless unlocking control device - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a wireless unlocking control device applied to a vehicle door or the like.

<< Prior Art and Problems Therewith >> As a conventional vehicular wireless unlocking control device, for example, the one disclosed in JP-A-59-24075 is known.

With this device, as long as you have a portable device unique to the user in your chest pocket, bag, etc., you can lightly press the switch provided near the door handle with your fingertips to lock the door. The motor can be automatically unlocked by a motor, and the unlocking operation can be significantly simplified as compared with the conventional method in which a key is inserted into a key hole and rotated.

On the other hand, in this device, as long as the owner of the portable device for the vehicle is inside and outside the door, anyone can easily unlock it by operating the switch. There was a risk that someone would intrude into the car unexpectedly.

Therefore, the applicant of the present application has previously described in Japanese Patent Application No. 58-177484 that when the key is inserted into the key hole of the ignition switch, even if the door handle switch is operated, the portable device can be operated. Has applied for a device (unpublished) that prohibits automatic unlocking by prohibiting sending of the transmission request command.

However, if such a structure is used to prevent entry into the vehicle while driving, if the key is accidentally inserted into the key hole of the ignition key and the driver's door is closed by the so-called keyless lock operation, no matter how much the mobile Even if he carried the machine and operated the door handle switch, it was thought that the lock could not be unlocked.

<Object of the Invention> An object of the present invention is to unlock a door by a keyless lock operation while a key is accidentally inserted into a key hole of an ignition switch while preventing an inadvertent entry into a vehicle interior while driving. It is an object of the present invention to provide a wireless unlocking control device that can be unlocked by a signal from a portable device even in the case of accident.

<< Structure of the Invention >> In order to achieve the above object, the wireless unlocking control device according to the present invention is configured as shown in FIG. 1, and includes a portable transmitter A and an in-vehicle control device B. Transmitter A is a code storage means a for storing the same unique code as the vehicle-mounted side.
And a unique code returning means b for wirelessly returning a signal including the unique code stored in the code storage means a in response to a transmission request command sent from the in-vehicle side. , Request transmission switch c mounted on the outer surface of the vehicle in place
Command generating means d for generating a transmission request command in response to the operation of the transmission request switch c, and transmitting means e for wirelessly transmitting the transmission request command.
A detecting means f for detecting a state where a key is inserted in a key hole of an ignition switch, and a portable transmitter A in response to the transmission request command.
A unique code collating means g for discriminating whether or not the unique code wirelessly returned from the vehicle is matched with a unique code preset on the vehicle side, and the unique code of the portable transmitter A received by the unique code collating means g. The unlocking means h for automatically unlocking the lock mechanism on condition that the code and the unique code set on the vehicle side match, and the receiving sensitivity of the unique code returned from the portable transmitter A to the portable transmitter. The first receiving means i is set so that A can be received even if A is separated by a predetermined distance or more, and the receiving sensitivity of the unique code returned from the portable transmitter A is set so that the portable transmitter A can be in a close range. Second receiving means j that is set so that it cannot be received, and when the unique code returned from the portable transmitter A is received,
When the detection means f detects that the key is inserted in the key hole of the ignition switch, the first reception means i is switched to the second reception means j, and the switching means k is included. To do.

<< Description of Embodiments >> FIG. 2 is a perspective view showing the relationship between an in-vehicle device and a portable device, FIG. 3 is a diagram showing a hardware configuration of the portable device, and FIG. 4 is a diagram showing a hardware configuration of the in-vehicle device. FIG. 5 is a flowchart showing a system program executed by the vehicle-mounted device and the portable device.

The device of the present invention comprises an in-vehicle device mounted on the vehicle side and a portable device that the vehicle user should carry.

As shown in FIG. 2, the vehicle 1 is a component of the vehicle-mounted device.
Main body device 2 stored under the driver's seat, a pair of loop antennas 6a, 6b or 6c, 6d provided corresponding to the driver's door 3 and the trunk lid 4, and a transmission request switch 5, respectively. .

In FIG. 2, only the transmission request switch 5 corresponding to the driver's seat door and the pair of loop antennas 6a and 6b are shown as a representative.

In this case, the transmission request switch 5 is attached near the door handle 7 of the driver's door 3, one loop antenna 6a is on the back of the driver's seat, and the other loop antenna 6b is on the inner circumference of the door mirror 8. It is fitted along.

Further, the portable device 9 has a rectangular plastic thin case which is convenient for storage in a chest pocket or a bag, and the case includes a transmitting / receiving loop antenna and a circuit board.

That is, as shown in FIG. 3, the portable device 9 includes a loop antenna 91 for transmission / reception, a reception / demodulation circuit 92 for receiving / demodulating a transmission request command from the high frequency captured by the loop antenna 91, and a portable device. A unique code storage unit 93 that stores a unique code on the side, a modulation circuit 94 and a carrier oscillation circuit 95 for wirelessly returning the unique code read from the unique code storage unit 93 to the in-vehicle device side,
It is composed of a microcomputer 96 that controls the entire portable device.

On the other hand, as shown in FIG. 4, the main body device 2 on the side of the vehicle-mounted device mainly includes a CPU 201 having a microcomputer configuration, and the CPU 201 includes a microprocessor unit, an I / O interface circuit, and a memory (R).
OM, RAM, etc.) and tires and the like.

The antennas 6c and 6d are loop antennas installed near the trunk lock of the trunk of the vehicle body, and the two antennas are arranged at a predetermined interval.

The other pair of loop antennas 6a and 6b is arranged near the driver's seat side door. As described above, one loop antenna 6b is in the mirror frame of the driver's seat side door mirror, and the other loop antenna 6a is in operation. Seats are located in the seats.

Corresponding to the loop antennas 6a and 6b, push button switches (hereinafter referred to as transmission request switches) 5 and 10 are attached near the door handle of the driver side door and at predetermined positions on the outer surface of the trunk, respectively.

One antenna 6a of each of the two pairs of loop antennas,
90 ° phase shifters 202 and 203 are connected to 6c, whereby a transmission signal and a reception signal are shifted by 90 °.

The switching circuits 204 and 205 are responsive to the switching signal S ₁ output from the CPU 201 to respond to the antenna pair 6 on the trunk side.
This is an analog switch circuit that activates either one of the antenna pair c, 6d or the antenna pair 6a, 6b on the driver's seat side. The A / D converter 206 inputs the reception signal received by the antenna 6a attached to the driver's seat through the high frequency amplifier 207, converts the level of the input signal into digital data, and converts this digital data. CPU 20 as the received signal strength data Rf
1 is to be supplied. Further, this A / D conversion operation is executed with the arrival of the trigger signal S ₂ supplied from the CPU 201.

The door switch 11 is for detecting the open / closed state of the driver side door, and is ON when the door is open and OFF when the door is closed.
It will be.

Similarly, the door switch 12 is a switch for detecting the open / closed state of each of the passenger door and the rear two doors (in the case of a sedan), and is turned on when the door is opened and turned off when the door is closed. .

The key insertion detection switch 13 is a switch for detecting whether or not a key is inserted in the key cylinder of the ignition key switch in the driver's cab, and is turned on when the key is inserted in the key cylinder. is there.

The lock knob switch 14 is a switch that is turned on when the door lock knob provided on the inner surface of the door on the driver's side is pushed in and the lock operation is performed.

The lock state detection switch 15 is a switch that detects the state of the door lock mechanism, and is a switch that is turned off when the door lock mechanism is in the locked state and turned on when the door lock mechanism is in the unlocked state.

The power supply start detection circuit 208 includes the switches 5, 1
When any one of 0 to 15 is turned on (however, when the switches 11 and 15 are turned on and off), it is driven for a predetermined time to supply power from the power supply 209 to each circuit. is there. In addition, the CPU 201
When the power supply holding signal S ₃ supplied from
The power supply is maintained regardless of the ON operation of each switch, and the power supply is stopped when the CPU 201 enters the standby state.

The relay 210 is driven when the trunk unlock signal S ₈ is output from the CPU 201 and the transistor Tr ₁ is turned on, and the relay unlocking solenoid (not shown) is driven to unlock the trunk lock. It is something that can be made.

The relay 211 and the relay 212 are respectively the CPU 201.
It is driven by turning on the transistors Tr ₂ and Tr ₃ by a door lock signal S ₇ and a door unlock signal S ₆ output from the relay 211. The relay 211 reverses a motor (not shown) for automatically opening and closing the door lock. The door lock is locked by the relay 212, and the relay 212 unlocks the door lock by rotating the motor in the normal direction.

The alarm signal S ₉ output from the CPU 201 is a signal for driving the alarm drive circuit 213 to blow the horn.

Further, a unique code is input to the CPU 201 via a multiplexer 214.

That is, the multiplexer 214 is provided with an input connector, and each terminal of this connector is open at the time of manufacturing.

When the lock control device is sold and handed to the user, the unique cord plug 16 stored together with the portable device 9 is inserted into the connector of the multiplexer 214.

This unique code plug 16 has four digits (each digit is four digits) so as to correspond to the unique code stored in the circuit of the portable device 9.
The corresponding pins are short-circuited so as to form code data (represented by bits).

Such a unique code plug 16 is a multiplexer 21.
The unique code data is supplied from the multiplexer to the CPU 201 by being inserted into the connector No. 4.

A modulator 215 modulates the carrier wave from the transmission circuit 216 with the signal S5 from the CPU 201, and the switching circuit 217.
The signals are output from the antennas 6a to 6d via a and via the amplifiers 220 and 221. Also, the antennas 6a to 6d
The signal received at 1 is amplified by the high frequency amplifier 218 via the switching circuit 217b, and detected and demodulated by the detection demodulator 219. The switching circuit 217 outputs the signal S ₄ from the CPU 201.
Therefore, only one of them is controlled to be turned on.

The attenuator 223 is activated by the signal S6 from the CPU 201 and attenuates the received signal to reduce the receiving sensitivity of the vehicle-mounted device.

Next, the operation of the device of the present invention will be described with reference to the flowchart of FIG.

The operation of this radio wave type key system will be described. When the transmission request switch 5 attached to the door of the vehicle 1 is operated, the microcomputer 201 of the vehicle-mounted device body 2 is interrupted, and the key is removed from the ignition switch of the vehicle. If it is output (Yes at step 100), the transmission request signal output from the microcomputer 201 is A by the operation of the modulation circuit 215 and the oscillator 216.
After being M-modulated, the vehicle side loop coil 6 as a CW wave
It is sent from a, 6b to the portable device 9 side using the induction electromagnetic field (steps 100, 101 in FIG. 5).

Then, on the portable device 9 side, the request signal is detected through the loop coil 91 and the reception demodulation circuit 92, and the microcomputer 96 operates in response to the request signal, and the unique code read from the unique code storage unit 93 is converted into the modulation circuit. 94, AM modulation is performed by the operation of the carrier transmission circuit 95, and it is returned from the loop coil 91 to the in-vehicle device side using the induction electromagnetic field (steps 201, 202, 203).

Next, on the in-vehicle device side, the loop coils 6a and 6b and the detector / demodulator 219 receive the unique code and collate this with the unique code read from the unique code plug 16 to determine whether the user is a pre-registered user. Is identified (steps 102, 103, 104 in FIG. 5).

If it is determined that the unique codes match, the actuator for door lock is driven via the relays 211 and 212 for driving the actuator to unlock or lock the door (steps 105 and 106 in FIG. 5). , 10
7).

As a result, the vehicle user can conveniently lock or unlock the door by carrying the portable device 9 in, for example, a chest pocket or a bag without performing any special key operation. .

On the other hand, when it is determined that the key is inserted in the key hole of the ignition key at the time of operating the transmission request switch (No at step 100), the CPU 20
The command S6 from 1 activates the attenuator 223,
The receiving sensitivity on the side of the vehicle-mounted device is switched and set to such a low sensitivity that the portable device 9 can only be received at a state where the portable device 9 is close to or close to the door mirror 8 (step 108).

As a result, even if the transmission request switch is operated from the outside while the vehicle is stopped at an intersection or the like, the communication between the in-vehicle device and the portable device owned by the driver is disabled and the driver's door 3 is opened. In addition, it is possible to prevent inadvertent intrusion into the vehicle interior.

On the other hand, if the driver's door 3 is locked by the keyless lock operation with the key still inserted into the ignition key switch by mistake, the portable unit 9 is brought into close proximity or close contact with the door mirror 8, By operating the transmission request switch 5, communication between the vehicle-mounted device and the portable device 9 can be performed as usual, and the driver's door can be unlocked without any trouble.

<Effects of the Invention> As is apparent from the above description of the embodiments, according to the present invention, the ignition key switch is erroneously operated while preventing the fear of being intruded by a thug during driving. Even when the door is locked with the keyless lock while the key is inserted, the door can be unlocked without any trouble by using the portable device and the transmission request switch. And reliability can be improved.

[Brief description of drawings]

FIG. 1 is a diagram corresponding to the claims of the present invention, FIG. 2 is a perspective view showing the relationship between an in-vehicle device and a portable device, FIG. 3 is a block diagram showing the electrical configuration of the portable device, and FIG. 4 is an in-vehicle device. FIG. 5 is a block diagram showing the electrical configuration of FIG. A: Portable transmitter B: In-vehicle control device a: Code storage means b: Unique code return means c: Transmission request switch d: Command generation means e: Transmission means f: Detection means g ...... Unique code collating means h ...... Unlocking means i ...... First receiving means j ...... Second receiving means k ...... Switching means

Front Page Continuation (72) Inventor Takahisa Tomoda 2 Takaracho, Kanagawa-ku, Yokohama, Kanagawa Nissan Motor Co., Ltd. (56) Reference JP-A-60-70284 (JP, A)

Claims (1)

[Claims] 1. A portable transmitter and an in-vehicle control device, wherein the portable transmitter has a code storage means for storing the same unique code as the in-vehicle side, and a transmission request command sent from the in-vehicle side. In response, a unique code returning means for wirelessly returning a signal including the unique code stored in the code storing means, wherein the vehicle-mounted control device includes a transmission request switch attached to a proper place on the outer surface of the vehicle body, and the transmission Command generation means for generating a transmission request command in response to operation of the request switch, transmission means for wirelessly transmitting the transmission request command, and detection for detecting a state where a key is inserted in the key hole of the ignition switch Means and a unique code wirelessly returned from the portable transmitter in response to the transmission request command are set in advance on the vehicle side. The unique code collating means for judging whether or not it matches the specified unique code, and the unique code of the portable transmitter received by the unique code collating means and the unique code set on the vehicle side are matched. The unlocking means for automatically unlocking the lock mechanism, and the receiving sensitivity of the unique code returned from the portable transmitter are set so that they can be received even if the portable transmitter is separated by a predetermined distance or more. Receiving means, second receiving means for setting the receiving sensitivity of the unique code returned from the portable transmitter to such a degree that the portable transmitter cannot receive unless the portable transmitter is within a short distance, and returning from the portable transmitter When the unique code is received, when the state in which the key is inserted into the key hole of the ignition switch is detected by the detecting means, the first receiving means is switched to the second receiving means. A wireless unlocking control device comprising: switching means.