JPS60159271A - Locking control apparatus for vehicle - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a vehicle lock control device that locks and unlocks a vehicle using a wireless system instead of a mechanical key.

<Background of the Invention> Conventionally, when attempting to open or close the gate of a building, research institute, or other residence, the gate is automatically locked and unlocked by a predetermined signal transmitted from a portable transmitter carried by the user. A device has been proposed.

For example, there is an "electronic identification door lock device" disclosed in Japanese Patent Application Laid-Open No. 50-8699.

The device disclosed in the above publication is related to locking and unlocking doors of houses, apartments, etc., and is composed of a door lock device on the door side and a portable transmitter carried by the user. The door lock device has a generator that generates staining force when the user rotates the door handle, and the electromotive force of the generator is used to send a predetermined frequency signal (request signal) to a portable transmitter. Send. When the portable transmitter receives the request signal, it transmits a response signal (specific signal) having a frequency different from that of the request signal to the door lock device.

The door lock device unlocks the door upon receiving the unique signal.

However, if the device in the above publication has a structure in which the request signal is transmitted using the electromotive force of a generator that generates electric power in response to an external mechanical operation, the user must , the door handle must be rotated with some force, making it difficult to lock and unlock the door. Furthermore, the signal strength of the request signal may be unstable and fluctuate depending on the operating force or the generating capacity of the generator. In such cases, if the user carries a portable transmitter in a bag, etc., the request signal may not be received reliably and the unique signal may not be sent to the door lock device, making it impossible to lock/unlock the door reliably. There are drawbacks such as not being able to do it.

On the other hand, when controlling the locks of vehicle doors, etc., the user can place the portable transmitter anywhere (such as in a breast pocket).

Even if you carry it in your pants pocket, bag, etc.
It can be locked and unlocked without having to take out the portable transmitter or perform any operations such as turning on a switch to activate the portable transmitter, and it can always be locked and unlocked reliably. Furthermore, since portable transmitters operate with limited power sources such as batteries, it is desirable to have a device that can be used for a long period of time without replacing the power source.

<Object of the Invention> The present invention has been made in view of the above background, and its purpose is to provide good operability when the user locks and unlocks the lock, and to ensure that the lock is always locked and unlocked. It is an object of the present invention to provide a vehicle locking control device that can be used for a long period of time without having to change the power supply.

<Structure of the invention> Hereinafter, the configuration of the present invention will be explained using FIG. 1.

201 is a switch provided on the vehicle body side that outputs a signal in response to an external operation.

202 is a request signal transmitting means provided on the vehicle body side, which transmits a request signal 203 for prompting transmission for a predetermined period when the switch 201 is operated.

Reference numeral 100 denotes a portable transmitter, which includes a power supply battery 101, a request signal receiving means 102 having an amplifier that is intermittently activated, and the request signal receiving means 102 comprising:
When the request signal 203 is received, the predetermined unique signal 1
04.

204 is a unique signal receiving means provided on the vehicle body side, which receives the unique signal 1041 for a predetermined period after the request signal transmitting means 202 transmits the request signal 203.

205 is provided on the vehicle body side and is connected to the unique signal receiving means 2.
This is a unique signal discriminating means that determines whether the unique signal 104 received at 04 matches a preset unique signal and outputs the result.

A lock actuator 207 is provided on the vehicle body side and locks/unlocks the vehicle.

206 is provided on the vehicle body side, and the unique signal discriminating means 2
This is a lock actuator driving means for driving the lock actuator 207 based on the output from the lock actuator 207.

Below, switch 201, request signal transmitting means 202
, unique signal receiving means 204, unique signal determining means 205,
The lock actuator driving means 206 and the lock actuator 2θγ will be described as the vehicle body side control device 200.

According to the configuration of the present invention, the request signal receiving means 102 of the portable transmitter 100 is configured to include an amplifier that operates intermittently.
The request signal 203 can always be reliably received without any operation, the unique signal 104 can be transmitted to the vehicle body control device 200, and the power consumption can be kept low. Further, the request signal receiving means 102 receives the request signal 2.
Due to the configuration in which the unique signal generating means 103 transmits the unique signal 104 only when the signal 03 is received, the battery 101 can be used for a long period of time by limiting the transmission operation that consumes a large amount of stain power to only when necessary. Then, in the vehicle body side control device 200, when the user operates the switch 201, the request signal transmitting means 2
02 transmits the request signal 203 for a predetermined period of time, power consumption due to the transmission operation can be reduced as much as possible, and a signal with relatively large output can be transmitted.

DESCRIPTION OF EMBODIMENTS An embodiment of a vehicle locking control device according to the present invention will be described below.

FIG. 2 is a diagram showing the configuration of the portable retractor 100. 2
0 is a parallel resonant tuning circuit, which includes a receiving loop antenna 1 and a contin+ connected in parallel to the receiving loop antenna 1.
o4 composed of j3 is microcomputer 9
J ON according to the output signal d.

The analog switch 4 is an OFF-operated analog switch, and inputs the signal from the parallel resonance tuning circuit 20 to the detection circuit 5 at 08:00. B is an amplifier circuit that has a set current setting terminal S for setting power consumption inside the circuit, and normally operates by flowing a current (set current) of several μA to several / (7/JA) to the set current setting terminal S. state, but does not operate when the set current is set to 0. 7 is a switch circuit using transistors, etc., and switches according to the pulse signal output from the microcomputer 9, and its output is sent to the amplifier circuit 6. 8 is a negative power supply output circuit that sets the bias of the amplifier circuit 6 to the operating point Ov. The amplifier circuit 6 is controlled by the pulse signal C output from the microcomputer 9 and the positive pulse signal C, and the amplifier circuit 6 amplifies and receives the signal detected by the detection circuit 5. The signal is inputted to the microcomputer 9 as a signal a.The above configuration constitutes a request signal receiving means 102 including an amplifier that operates intermittently.

Next, the configuration of the unique signal generating means 103 will be explained.

10 is a unique code storage circuit that outputs 4-bit, 4-digit unique code data 1f-r to the microcomputer 9;

Note that this unique code storage circuit 1o may be constructed of a memory element such as a ROM, but in order to reduce costs, it may be constructed using, for example, a printed circuit board having a short-circuited circuit pattern for each bit. , it is also possible to form data of 1""o" depending on whether or not to cut the short circuit pattern. 15 is an oscillation circuit that has a buffer 16 and a crystal oscillator 12 inside the circuit, and is output from the microcomputer 9. A unique code signal e based on the data stored in the unique code storage circuit 10 is input, and a signal obtained by modulating the unique code signal e is sent from the transmitting loop antenna 2 via the buffer 14 and the high frequency transistor 13. It is something that makes you appear.

In addition, power is supplied to each circuit using a small, long-life lithium battery, similar to those used in electronic watches.

FIG. 3 is a flowchart showing the contents of the process executed by the microcomputer 9.

The operation of the portable transmitter 1oo will be described below with reference to FIGS. 2 and 3. Typically, a portable transmitter 1o.

As shown in step (1) in FIG. 3, the amplifier circuit 6 is in a waiting state for receiving a request signal. In this state, the amplifier circuit 6 operates intermittently depending on the output of the switch circuit 7. At 08 o'clock, it is in the operating state υ, and when it is OFF,
Inactive. The reception signal received by the parallel resonance tuning circuit 2o in this request signal reception standby state is
The signal is input to an amplifier circuit 6 via an analog switch 4 and a detection circuit 5.

Here, the amplifier circuit 6 operates intermittently as described above, but the duty of the pulse signal can be set to the operating time and non-operating time, and the duty of the pulse signal can be set. The settings should be made in consideration of the generation time of a request signal transmitted for a predetermined period from the vehicle body side splitting device 200 (described later), and when the received signal is a request signal, the received signal a (H microcomputer 9 I'm trying to type it in.

When the received signal a is input, the microcomputer 9 performs the process of step (1) in FIG. 3 so that the received signal a becomes
Only in the case of a request signal, the unique code data stored in advance in the unique code storage circuit 9 is read (step (2) in FIG. 3), and the unique code data is output as a unique code signal e of a serial pulse train. . (Step (3) in Figure 3) This unique code signal e is transmitted to the oscillation circuit 1
5 becomes a modulated pulse train signal containing a carrier wave component of a predetermined frequency, and is inputted to the transmitting loop antenna 2 via the buffer 14 and the high frequency transistor 13 for wireless transmission.

At this time, the signal d output from the microcomputer 9 causes the analog switch 4c to turn OFF, cutting off the signal from the rectangular resonance tuning circuit 20, and as a result, the received signal i is no longer input to the microcomputer 9.

In this way, in the portable transmitter 100 of this embodiment,
By providing the amplifying circuit 6 in the request signal receiving means 102, the degree of amplification can be increased and the request signal can be reliably output to the microcomputer 9 as the received signal a, and the amplifying circuit 6 can be used to reduce the duty of the pulse signal. Since the amplifier circuit 6 operates intermittently, the power consumption of the amplifier circuit 6 is reduced and the power supply lithium battery 11 can be used for a long period of time.

Further, since the unique code signal is transmitted only when the request signal is input to the microcomputer 9 as the received signal a, the lithium battery 11 for power supply can be used for a long period of time.

Here, the set current setting S is used to operate the amplifier circuit 6 intermittently, but a configuration may also be adopted in which the operating power is intermittently supplied to the amplifier circuit.

FIG. M4 is a diagram showing the vehicle body side control device 200.

This control device 200 is a microcomputer (hereinafter referred to as
53 (referred to as CPU), this CPU 53 is a micro-block unit, I10
Interface circuit, memory (ROM, RAM)
, and a timer.

The antennas 41a, 41bU are loop antennas installed near the trunk lock of the vehicle body, and the other pair of loop antennas 410, 41d is placed near the driver's door.

Furthermore, corresponding to the loop antennas 41a to 41d,
Push-button switches (hereinafter referred to as start switches) 62 and 63 are installed at predetermined positions on the outside of the driver's side door and trunk.

The switching circuits 46a and 46b are connected to the output port 0. of the CPU 53. This is an analog switch circuit that activates either the trunk side antenna pair 41a, 41b or the driver's seat side antenna pair 41e, 41d in response to a switching signal s1 output from the antenna pair s1.

The door switch 5T is for detecting the open/closed state of the driver's side door, and is turned on when the door is closed and turned off when the door is closed.
This is the result.

Similarly, the door switch 58 is a switch for detecting the open/closed state of the passenger door and the two rear doors (in the case of a sedan), and is turned on when the door is closed and turned off when the door is closed. Become.

The key switch 59 is a switch for detecting whether or not a key is inserted into the key cylinder of an ignition key switch in the driver's cab, and is turned on when a key is inserted into the key cylinder.

The lock knob switch 60 is a switch that is turned on when a door lock knob provided on the inner surface of the driver's seat side door is pushed in and a manual locking operation is performed.

The lock state detection switch 61 is a switch 6D 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 start detection circuit 54 also includes the switches 57 to 6.
If any one of 3 is turned ON (however, when switching between ON and OFF for switches 57 and 61)
The power supply 55 supplies power to each circuit. Also, the output port 0 of the CPU 53. When the supplied power supply holding signal S arrives, the power supply is maintained regardless of the operation of each of the switches, and the power supply is stopped when the CPU 53 enters the standby state. .

The relay 65 receives the trunk unlock signal S from the output port 08 of the CPU 53 and outputs the transistor Tr.
is activated by turning ON, and drives the trunk lock unlocking angle solenoid (path shown) to unlock the trunk lock.

The relay 66 and the relay 67 are respectively connected to the output port 0? of the CPU 53. , 0. Door lock signal S?
and transistor Tr by door unlock signal S6
, , Tr, are turned ON, and the relay 66 releases the door lock by rotating the motor (the path shown in the diagram) that automatically opens and closes the door lock, and the relay 66 releases the door lock.
is for locking the door by reversing the motor.

Output port 0 of CPU53. Alarm signal S output from
9 is a signal that drives the alarm drive circuit 68 and causes the horn to sound.

Furthermore, the input port 11 of the CPU 53. From there, a unique code is input via a multiplexer 69.

That is, the multiplexer 69 is provided with an input connector, and all terminals of this connector are open at the time of manufacture.

When this locking control device is sold and handed over to a user, the unique code plug γ0 that was stored together with the portable transmitter 100 is attached to 1. Plugging into the connector of the multiplexer 69 is performed.

The unique code plug 70 corresponds to the unique code stored in the circuitry of the portable transmitter 100 to form four-digit (each digit represented by four bits) code data. The structure is such that the bins are short-circuited.

Such a unique code plug 70 is connected to the multiplexer 69.
By being inserted into the connector of the multiplexer, unique code data is supplied to the CPU 53 from the multiplexer.

And the pair of loop antennas 41a.

41b, 41c, and 41d have the following mounting positions:
For example, as shown in FIG. 7, a pair of loop antennas 410 and 41d provided near the door lock are formed by a conductive printed pattern on the mirror periphery of the driver's side door mirror 86 and on the surface of the driver's side door window 87. ing.

Further, the pair of loop antennas 41a and 41b provided on the trunk lock side are formed by a conductive print pattern on the surface of the rear window glass 88, as shown in FIG. 8, for example.

In addition to the above, for example, as shown in FIG.
Alternatively, a pair of loop antennas 41c and 41d may be installed inside the backrest of the passenger seat 90.

Furthermore, the activation switches 62 and 63 are provided at a position close to a pair of loop antennas provided near the locks of the sole and at a position closest to the operating portion of each lock. The activation switch 62 is located on the driver's door handle 91 as shown in FIG. 7, and the trunk lock activation switch 63 is located on the driver's door handle 91 as shown in FIG.
It is installed on the rear end of the trunk bonnet.

Next, FIGS. 5 and 6 show the contents of the processing executed by the CPU 53. Hereinafter, the operation of the apparatus of this embodiment will be explained using the same figures.

In Figures 5 and 6, the part surrounded by broken lines is the CPU
5 is a flowchart showing the contents of processing executed in 53.

Assuming that all of the vehicle's door locks are locked, if a driver carrying the portable transmitter 1oofr gets into the vehicle and tries to lock the driver's side door. The operation will be explained as an example.

The only operation required by the driver is to manually operate the activation switch 62 provided near the door handle of the driver's seat side door.

As the starting switch 62 is turned on, the O
The R function 81 turns one of the start switches to O.
Detects that the
is executed. This startup operation (10) is a process of driving the power start detection circuit 54, canceling the standby state of the CPU 53, and starting the CPU.

The CPU 53 started by the above startup operation (10),
First, in step (11), a desired function is detected and stored.

Detection and storage processing (11) of this desired function involves detecting which of the start switches 62 and 63 has been turned on based on the input states of the input ports ■1 and III, and detecting which switch has been turned on. The input port on the other side (l5o in this case) t: Temporary storage processing is performed in the functional storage memory 86.

Next, the process (12) is executed and a loop antenna for transmitting the request signal is selected.

This is based on the contents of the function storage memory 86.
This is a process of activating the transmitting loop antenna provided near the N-operated activation switch, and in this case, the transmitting loop antenna 41c near the driver's seat side door is activated. That is, by outputting the switching signals 84 and 81 from the output ports hot and o, respectively,
The switching circuits 46a, 46b, and 4B are switched and set to supply the request signal outputted via the modulator 49 to the loop antenna 41C.

Then, the process (13) is continued, and the drive signal SS is supplied from the output port 01 to the modulator 49, and the carrier wave from the oscillator 50 is modulated into a request signal. This request signal will be transmitted as a wireless signal from the activated loop antenna 410.

At this time, the generation time of the request signal is determined by the timer 8γ in the CPU 53 for a certain period of time (for example, 100 m s
ec) is configured to be transmitted.

Note that the transmitting antenna selection section 82 and reception antenna selection section 83 in the figure are the switching circuit 46a.

46b, 48, etc. are shown.

When the request signal is transmitted in this way, the portable transmitter 100@ performs an operation of wirelessly transmitting a code signal in response to receiving the request signal as described above.

In the vehicle body side control device 200, after performing the operation of transmitting the request signal, processing (14) is executed, and the vehicle body side control device 200 enters a state of waiting to receive the unique code signal transmitted from the portable transmitter 100. There is.

The process (14) is performed based on the contents of the function storage memory 86, based on the receiving loop antenna (in this case, the loop antenna 41d) corresponding to the activation switch that has been turned ON.
) t-Processing to activate, output capo-) 0.
,0. The circuit is set such that the received signal is input to the detection/demodulator 52 by outputting the switching signals S+ and S+1 from the switching signals S+ and S+1.

Then, when the process (15) is executed next, a drive signal is supplied from the output boat 04 to the detection/demodulator 52, and the code signal received by the receiving loop antenna 44dK is detected and demodulated. The code signal component in the carrier wave is extracted and input to the CPU 53 along with the A/D converted input signal.

At this time, the CPU 53 executes process (16) to read and store the input unique code (hereinafter referred to as the received unique code).

Once the reception unique code is read and stored, the first and sixth
Process (17) in the figure is executed. This process is performed using unique code data set on the vehicle body (hereinafter referred to as vehicle body-specific code) sent as serial data from the unique code storage unit 84 (consisting of the multiplexer 69 and the unique code plug 10). ) is loaded, and
This is a process of comparing the received unique code data and determining whether the two match.

The vehicle body-specific code data supplied from the unique code storage section 84 is stored in a register within the CPU and processed as parallel data.

Next, process (18) is executed, and as a result of the above comparison, it is determined whether or not there is a 1 match between the two codes. If there is a 1 match, the next process (19) is executed. Ru.

This process (19) is a process of supplying a drive signal to the actuator drive section 85 comprised of transistors Tr, -Tr, and relays 65-67. In this case,
It is determined based on the contents of the function memory 86 that the activation switch 62 of the driver's side door has been turned on, and whether the lock state detection switch 62 is OFF (that is, the door is locked). Enter the boat 1. Determine from the condition. Then, when the door lock is in the locked state, a drive signal S is output from the output (indicator) Os to turn on the transistor Tr3 and relay 67.
By turning on + and causing the door lock motor to rotate forward, the door lock is unlocked.

After the door is unlocked in this manner, the CPU 53 enters a standby state until the next switch operation is performed.

On the other hand, if the determination result of the above process (18) is NO, the next process (20) is executed. This process is a process of counting the number of times that the determination result of the coincidence determination process (18) becomes NO while a certain period of time is being counted by the timer 88 that starts when the start switch is turned ON.

If the count exceeds the specified number of times within this certain period of time,
The determination result of the next process (21) becomes YES.

As a result, the process (22) is then executed to stop the operation of the CPU for a certain period of time. In addition,
At this time, @ alarm output S is generated and the alarm drive circuit 68t-
It is also possible to make the horn sound by driving it.

With this kind of processing, for example, if a child or the like plays a trick and repeatedly turns on the start switch 62, 63t with all the door locks locked, a request signal is sent each time and the battery power is turned off. It is possible to prevent situations that would result in the consumption of

Further, in the above description, the door lock unlocking operation has been described, but the unlocking operation of the trunk lock or the locking operation of the door lock is also performed in the same manner as the above-mentioned operation.

In this way, when the runner carries the portable transmitter 100 with a code that matches the unique code on the vehicle body,
The portable transmitter 1o is configured such that the door lock and trunk lock are unlocked and locked only when 62 and 63 are turned on.

Even if a person who does not have the lock tries to unlock the lock, the unlocking operation will not be performed. Further, even if a person who has a portable transmitter with a different unique code signal attempts to similarly unlock the door, the door will not be unlocked.

Furthermore, activation switches 62 and 63 are provided for each lock to give an opportunity to start unlocking and locking each lock. Alternatively, only the lock to be locked can be selected and activated.

For example, if the user wants to unlock only the trunk lock while all the door locks are locked, only the trunk lock can be unlocked by operating the trunk lock activation switch 63t.

Further, the activation switches 62 and 63 are provided near each lock, that is, a door lock and a trunk lock, so that the unlocking/locking operation of the lock can be performed close to the lock part to be unlocked/locked. can.

Furthermore, a pair of loop antennas 41a for each lock.

41b, 41c, and 41d are arranged near the starting switches 62, 63, so that the person holding the portable transmitter 100t can easily operate the starting switches 62, 63.
If the driver attempts to operate the switch, he or she will naturally enter the signal transmission range of the pair of loop antennas.If the driver turns on the start switch without being particularly conscious, the lock will be unlocked or locked. As the locking operation is performed, the driver feels that the locking operation is extremely smooth.

The signal transmission range of the loop antenna described above is based on the guided electromagnetic field as the radio signal transmission medium, so the signal strength is extremely high near the loop antenna, and the signal strength increases rapidly as the distance from the loop antenna increases. Intensity has the characteristic of attenuating. For this reason, for example, when attempting to unlock the trunk, a signal is transmitted not only to the loop antenna on the trunk lock side but also to the loop antenna on the door lock side.
It is possible to prevent a situation in which a third party turns on the door lock starting switch 62 and unlocks the door while the driver is unlocking the trunk.

In the fist embodiment described above, the functions of the loop antennas 41a to 41d of the vehicle body side control device 200 are separately provided for transmission and reception. A configuration may be adopted in which each loop antenna 41a and 41e is used to perform transmission and reception with one loop antenna.

In this way, it is possible to reduce the number of parts and reduce costs.

In addition, although the above-described embodiment shows a device that can lock and unlock the driver's side door lock and trunk lock, it is also possible to lock and unlock the steering wheel, for example. Furthermore, in addition to the existing lock mechanism, it can also be used as a configuration for turning on/off ignition switches, audio equipment, etc.
It is also possible that these devices can be turned on and off only by a person in possession of a portable transmitter.

When providing the locking/unlocking of the steering wheel lock and the ON/OFF function of the ignition switch, for example, as shown in FIG. 11, a rotary switch 96 is provided on the side of the steering column 95.
A configuration is conceivable in which the switch is used as a handle lock and an ignition switch start switch. In this case, it is preferable that the loop antenna for transmitting and receiving the request signal and the unique code signal be installed inside the seat backrest shown in FIG. 9 described above.

Furthermore, by configuring the startup switch with a touch switch, there is no need to press the switch.
Operability can be further improved.

In addition, transmission operations that require relatively large power consumption can be
The vehicle body side control device 200 is configured to operate only for a predetermined period when the user operates a switch, thereby reducing power consumption as described above and making it possible to generate a signal with a relatively large output, thereby improving signal transmission. It can be done reliably.

<Effects of the Invention> As explained in detail above, the vehicle locking control device according to the present invention can be used reliably without any operation on the portable transmitter, no matter where the user carries the portable transmitter. A unique signal can be sent to the vehicle body control device, and it can be used for a long period of time without replacing the power supply battery. Furthermore, power consumption can be reduced in the vehicle body control device, and a relatively large request signal can be transmitted only when the user operates a switch.

Therefore, the vehicle locking control device of the present invention can improve operability and reliability when a user locks and unlocks the lock, and can reduce power consumption.

[Brief explanation of drawings]

FIG. 1 is a diagram showing the configuration of the present invention, FIG. 2 is a diagram showing a portable transmitter in an embodiment of the vehicle locking control device according to the present invention, and FIG. 3 is a diagram showing the portable transmitter. FIG. 4 is a flowchart showing the contents of the process; FIG. 4 is a diagram showing the vehicle body side control device in the same embodiment; FIGS. 5 and 6 are operation flow charts showing the contents of the process executed in the vehicle body side control device; 7 to 9 are external views showing a mounting example of the loop antenna of the device according to the embodiment, FIG. 10 is a diagram showing a portion of another embodiment of the present invention, and FIG. 11 is a diagram showing still another embodiment of the present invention. FIG. 3 is an external view showing an example of implementation of the activation switch according to the embodiment. 100... Portable transmitter 101... Battery 102... Request signal receiving means 104... Unique signal 200... Vehicle body side control device 201... Suite 202... Request signal transmitting means 203... ...Request signal 204...Unique signal receiving means 205...Unique signal determining means 206...Lock actuator driving means 207...
・Lock actuator 5...Detection circuit 6...Amplification circuit 9...Microcomputer 10...Unique code storage circuit 11...Battery 15...Oscillation circuit 20...Parallel resonance tuning circuit 418~ 41d...Loop antenna 53...CPU 62.63...Start switch 65-67...Relay switch Fig. 1

Claims (1)

[Claims] A switch provided on the vehicle body and outputting a signal in response to an external operation; A switch provided on the vehicle body and transmitting a request signal for prompting transmission for a predetermined period when the switch is operated. request signal receiving means comprising a battery for power supply and an amplifier that is intermittently activated; and a request signal receiving means for transmitting a predetermined unique signal when the request signal receiving means receives the request signal. a portable transmitter comprising a signal generating means; a unique signal receiving means provided on the vehicle body side and receiving the unique signal for a predetermined period after the request signal transmitting means transmits the request signal; a unique signal determining means, provided on the vehicle body, for determining and outputting whether or not the unique signal received by the unique signal receiving means matches a preset unique signal; provided on the vehicle body side, for locking the vehicle; - A locking control for a vehicle, comprising: a lock actuator for unlocking; and a lock actuator drive means provided on the vehicle body side, and for driving the lock actuator in response to an output from the unique signal discriminating means. Device.