JPH0633691B2 - Wireless vehicle security device - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a wireless vehicle security device capable of locking a door or the like provided on a vehicle from a remote location.

(Prior Art) Generally, a lock device is provided on an opening / closing body such as a door or a trunk lid of a vehicle, and when the vehicle is alighted, the device is locked to prevent the vehicle or luggage in the vehicle from being stolen. However, it is not uncommon for the above-mentioned theft to occur when neglecting to lock the vehicle when getting off. On the other hand, even after getting off the vehicle and leaving the vehicle, it is possible to lock it by checking whether it is locked wirelessly or not and returning to the vehicle installation location if neglected. It is possible to do so. By doing so, it is possible to prevent forgetting to lock the vehicle and prevent the vehicle or the goods in the vehicle from being stolen.

On the other hand, according to Japanese Patent Application Laid-Open No. 58-138875, as a door locking device, the receiver unlocks the automatic lock when it receives a radio wave transmitted from the transmitter on which a predetermined secret code is superimposed. A composition is disclosed. According to this locking device, it is possible to prevent unlocking by a person who does not carry the transmitter, and it is possible to unlock even from a place away from the door by using a predetermined transmitter. It is convenient. Therefore, if such a locking device is applied to an opening / closing body of a vehicle, for example, a driver who is away from the vehicle unlocks the vehicle for another occupant and gets on the other occupant first. In addition, when loading and unloading luggage, it is possible to lock or unlock from a place away from the vehicle, which is a hassle such as having to release the luggage once for locking or unlocking near the vehicle. Thus, the convenience of locking and unlocking the opening / closing body can be improved.

Therefore, with respect to an opening / closing body such as a door in a vehicle, a lock device for the opening / closing body can be locked and unlocked from a place remote from the vehicle by using a portable transmitter carried by a driver or the like. It is conceivable to prevent such problems and improve convenience, but when adopting such a wireless locking system, reliability of the system becomes a problem. That is, when the transmitter is locked from a location remote from the vehicle, the transmission signal is not reliably received by the vehicle-side receiver due to radio wave interference or the like, or even if it is received, the lock device or the drive of the device is driven. There may be a case where the locking device does not properly perform the locking operation due to a malfunction of the mechanism or the like. In such a case, the sender is far from the vehicle and cannot confirm the locking error. If he believes that the sender has locked the transmission operation, the risk of theft is rather increased.

(Object of the Invention) The present invention addresses the reliability problem described above in the case where the lock device for the opening / closing body provided in the vehicle can be locked wirelessly. When the lock operation is performed from a place using the portable device, the sender side can confirm that the lock device on the vehicle side is locked. This prevents the sender from erroneously recognizing that the transmitter is locked when a locking error occurs due to poor communication between the transmitter and receiver, malfunction of the lock mechanism, etc.
It is an object of the present invention to eliminate the risk of theft based on such misidentification and improve the reliability of this type of locking system.

(Structure of the Invention) A wireless vehicle security device according to the present invention is characterized by having the following structure in order to achieve the above object.

That is, lock means for locking an opening / closing body such as a door provided in a vehicle, a portable device for transmitting a lock signal for locking the opening / closing body from a location remote from the vehicle, and the portable device provided in the vehicle And a vehicle-mounted device that sends a lock actuation signal to the lock means when the lock signal from the vehicle is received, and the lock means is actuated by the lock actuation signal to lock the opening / closing body. When the lock confirmation signal from the vehicle-mounted device cannot be received after transmitting the lock signal, the transmission of the lock signal is extended. It is characterized in that it is configured in.

This configuration will be described in more detail with reference to FIG. 1. In the portable device 1, the control unit 2 serves as a center, and a lock command lock switch 3 and a changeover switch 4 when the switch 3 is turned on are used. The transmission circuit 6 for transmitting the lock signal A from the antenna 5, and the changeover switch 4 from the antenna 5
There is provided a receiving circuit 7 for receiving the lock confirmation signal B via the display and a display unit 9 for displaying that the signal B has been received via the driver 8 when the lock confirmation signal B is received.
On the other hand, the vehicle-mounted device 11 has a reception circuit 15 which receives the lock signal A from the portable device 1 via the antenna 13 and the changeover switch 14 centering on the control unit 12, and a driver 16 when the lock signal A is received. An actuator 17 driven by means of a switch to operate a locking means (not shown) for the opening / closing body, a lock detection switch 18 for detecting that the opening / closing body is locked by the actuator 17, and the opening / closing body by the switch 18. A transmission circuit 19 is provided for transmitting a lock confirmation signal B via the changeover switch 14 and the antenna 13 when the lock is detected.

Therefore, when the lock switch 3 of the portable device 1 is turned on, the lock signal A is sent from the portable device 1 to the in-vehicle device 11 and the actuator 17 of the lock means is actuated to lock the opening / closing body. Is detected by the lock detection switch 18 and a lock confirmation signal B indicating that the lock is applied is sent from the vehicle-mounted device 11 to the portable device 1, thereby displaying that the display unit 9 of the portable device 1 is locked. Will be done. When the lock signal A is not received by the vehicle-mounted device 11 for some reason, or when the opening / closing body is not locked even though the lock signal A is received, the lock detection switch 18 does not operate, and the lock signal A is carried from the vehicle-mounted device 11. Machine 1
Since the lock confirmation signal B is not sent to the device, the display unit 9 of the portable device 1 does not indicate that the device is locked or displays a locking error.

In this way, it is possible to confirm whether or not the opening / closing body has been locked correctly when the locking operation is performed by the portable device 1 from a place away from the vehicle.

In the wireless locking system as described above, even if the lock signal A is transmitted from the portable device 1 for a certain period of time, a temporary communication failure occurs due to radio wave interference, a transmission direction defect, or the like, or the vehicle side There is a case where a temporary malfunction of the lock mechanism occurs in 1. However, even in such a case, if the lock signal A is sent again, it may operate normally. Therefore, in the present invention, as described above, when the lock confirmation signal B from the vehicle-mounted device 11 is not received after the transmission of the lock signal A from the portable device 1, the transmission of the lock signal A is automatically extended. Is composed of. This extension of transmission is performed when the transmission is continuously performed for a predetermined time without interruption,
There is a case where transmission for a predetermined time is repeated a plurality of times.

(Effect of the invention) As described above, according to the present invention, in the wireless vehicle security device capable of locking the opening / closing body of the vehicle from a location remote from the vehicle by the portable device carried by the driving vehicle or the like, It is possible to confirm on the portable device side away from the vehicle whether or not the opening / closing body of the vehicle is locked correctly when the opening / closing body of the vehicle is locked by the machine. Thus, when a locking error occurs due to poor communication due to radio interference or malfunction of the lock device or its drive mechanism on the vehicle side, the risk of the sender misidentifying that the device is locked is prevented. Theft of the vehicle or luggage in the vehicle due to such misidentification is prevented in advance. In addition, after the lock signal is transmitted from the portable device, if the lock confirmation signal from the in-vehicle device side is not received, the transmission of the lock signal is extended, so a locking error due to temporary communication failure or malfunction etc. Is prevented, and the reliability of this type of wireless locking system is further improved.

(Example) Hereinafter, an example of the present invention shown in the drawings will be described.

2 and 3 show configurations of a portable device and an in-vehicle device, respectively. First, the portable device 21 of FIG. 2 will be described.
The portable device 21 is provided with an operation unit 23, a lock signal transmission unit 24, a lock confirmation signal reception unit 25, and a display unit 26 around the microcomputer 22, and the lock signal transmission unit 24. Alternatively, a changeover switch 28 for connecting either one of the lock confirmation signal receiving section 25 to the antenna 27 is provided.

The operation unit 23 includes a lock switch 29 for a lock command.
And the coil 3 that is energized when the switch 29 is turned on.
0 and the light emitting diode 31. Then, when the coil 30 is energized, the changeover switch 28 switches from a state in which the lock confirmation signal receiving section 25 and the antenna 27 are connected to a state in which the lock signal transmitting section 24 and the antenna 27 are connected. Further, the lock command signal a by the ON operation of the lock switch 29 is input to the microcomputer 22.

In addition, the lock signal transmitter 24 includes a local oscillator circuit 32.
And a modulation circuit 33 that superimposes a high-frequency signal b ₁ output from the circuit 32 and a code signal b ₂ output from the microcomputer 22 indicating a predetermined code number, and an output signal b ₃ of the modulation circuit 33 is amplified. High frequency amplifier circuit 3
4 and the signal amplified by the amplifier circuit 34 is outputted as the lock signal A from the lock signal transmitting section 24.

Further, the lock confirmation signal receiving unit 25 receives the lock confirmation signal B input from the antenna 27 via the changeover switch 28.
A high-frequency amplifier circuit 35 for amplifying the output signal, and the output signal c _{1 of} the high-frequency amplifier circuit 35 by mixing the output signal c _{1 of the} amplifier circuit 35 and the low-frequency signal c ₂ output from the local oscillator circuit 36.
Circuit 37 for lowering the frequency of the signal, an intermediate frequency amplification circuit 38 for amplifying the output signal c ₃ of the mixing circuit 37, and a detection circuit 39 for extracting a required code signal c ₅ from the output signal c _{4 of the} amplification circuit 38. And a waveform shaping circuit 40 for shaping the waveform of the code signal c ₅ , and the output signal c _{6 of} the waveform shaping circuit 40 is the microcomputer 22.
It is designed to be input to.

Further, the display unit 26 has a first and a second which are sequentially turned on by the display signal d output from the microcomputer 22.
It is composed of transistors 41 and 42, and a light emitting diode 43 which is energized to emit light when the second transistor 42 is conductive. Here, the display signal d is output as a confirmation display signal when the lock confirmation signal B is input to the microcomputer 22 via the lock confirmation signal receiving section 25, and when the lock confirmation signal B is not input, It is also output as an error display signal when a predetermined process is performed. Therefore, the display unit 26 performs the lock confirmation display and the error display in different display formats. Note that another display unit having the same configuration as the display unit 26 may be provided so that the lock confirmation display and the error display are separately performed by both the display units.

Next, the configuration of the vehicle-mounted device 51 shown in FIG. 3 will be described. In the vehicle-mounted device 51, a lock signal receiving section 53 and a lock confirmation signal transmitting section 54 are mainly provided in the microcomputer 52.
From the output of the microcomputer 52 or the manual switch 58, a changeover switch 56 for connecting one of the receiving section 53 and the transmitting section 54 to the antenna 55, a switch drive section 57 for changing over the changeover switch 56. Is provided with a motor drive unit 60 for driving the lock motor 59, and a lock detection switch 61 for detecting whether or not a lock device (not shown) is locked is connected to the microcomputer 52.

The lock confirmation signal transmission unit 54 is similar to the lock signal transmission unit 24 in the portable device 21 described above, and the local oscillation circuit 6
2, a modulation circuit 63 and a high frequency amplification circuit 64,
Code signal e output from the microcomputer 52
₁ and the high-frequency signal e ₂ output from the local oscillation circuit 62 are superimposed, the superimposed signal e ₃ is amplified, and then the lock confirmation signal B is output. Further, the lock signal receiving unit 53 is also the lock confirmation signal receiving unit 25 in the portable device 21.
A high frequency amplifier circuit 65 for amplifying the lock signal A, and a mixing circuit for mixing the output signal f _{1 of the} amplifier circuit 65 and the output signal (low frequency signal) f _{2 of the} local oscillator circuit 66. 67 and an intermediate frequency amplifier circuit 68 for amplifying the signal f ₃ whose frequency is lowered by the mixing circuit 67.
A detection circuit 69 for extracting a desired code signal f ₅ from the output signal f ₄ of the amplifier circuit 68, and a waveform shaping circuit 70 for shaping the waveform of the code signal f ₅ . The output signal f ₆ is the microcomputer 52
It is designed to be input to.

The switch driving section 57 has first and second transistors 71 and 72 which are sequentially turned on by a switching signal g output from the microcomputer 52, and a coil 73 which is turned on when the second transistor 72 is turned on. When the coil 73 is energized, the changeover switch 56 is switched from the state in which the lock signal receiving section 53 and the antenna 55 are connected to the state in which the lock confirmation signal transmitting section 54 and the antenna 55 are connected.

Further, in the motor drive unit 60, the low-level lock actuating signal h ₁ and the lock release signal h ₂ output from the microcomputer 52 are inverted to the high level and then input to one of the terminals, respectively. , Second OR circuits 74, 7
5, first and second transistors 76 and 77 which are made conductive by the outputs of these OR circuits 74 and 75, respectively, and first and second coils 78 and 79 which are made to be conductive when these transistors 76 and 77 are made conductive. Have and. Further, the manual lock operation signal i ₁ and the manual lock release signal i ₂ from the manual switch 58 are input to the other terminals of the first and second OR circuits 74 and 75, respectively. That is, if the manual switch 58 is operated to the first contact 58 ₁ side, the manual lock actuation signal i ₁ is input to the first OR circuit 74, and if the switch 58 is operated to the second contact 58 ₂ side, the manual lock release signal i ₁ is input. ₂ is input to the second OR circuit 75. Therefore, when the lock operation signal h ₁ from the microcomputer 52 or the manual lock operation signal i ₁ from the manual switch 58 is output, the first coil 78 is energized, and the lock release signal h ₂ from the microcomputer 52 or the manual switch 58 is supplied. The second coil 79 is energized when the manual unlock signal i ₂ is output. And
When the first coil 78 is energized, the first switch 81 in the power supply circuit 80 of the lock motor 59 is switched to the power supply side, so that the power supply switches the first switch 81, the first diode 83, the direction changeover switch 85, and the lock motor. 59
A current flows in the X direction via the second switch 82 and the second switch 82, whereby the lock motor 59 rotates in the direction for locking the lock device (not shown). Further, when the second coil 79 is energized, the second switch 82 in the power supply circuit 80 is switched to the power supply side, and the second switch 82, the lock motor 59, the direction changeover switch 85, and the second diode 8 are switched from the power supply.
When a current flows in the Y direction via the fourth switch 81 and the first switch 81, the lock motor 59 rotates in the direction to release the lock device. Here, the direction changeover switch 85
Prepares for the next locking operation by switching to the first diode 83 side when the motor 59 rotates to the unlocked position of the lock device, and the second diode 48 side when the motor 59 rotates from the unlocked position to the locked position. To prepare for the next unlocking operation.

The lock detection switch 61 is turned on when the lock device is in the locked state and sends the lock detection signal j to the microcomputer 52.

Next, the operation of the portable device 21 and the in-vehicle device 51 will be described with reference to the flowcharts shown in FIGS.

First, when the lock switch 29 of the portable device 21 is turned on, the microcomputer 22 of the portable device 21 operates and the flowchart of FIG. 4 is executed. That is, the microcomputer 22 determines the control variable N in step P _1.
After resetting to 0, the lock signal A is output via the lock signal transmitting section 24 shown in FIG. ₂ in step P ₂ .
At this time, the changeover switch 28 is operated by turning on the lock switch 29, and the lock signal transmitting unit 2 is operated via the coil 30.
Since it is switched to the 4 side, the lock signal A is transmitted from the antenna 27 via the changeover switch 28.
At the same time, in the portable device 21, step P
_{As 3} is displayed that the light emitting diode 31 of the operation unit 23 is energized and the lock signal A is transmitted,
In step P ₄ , the timer built in the microcomputer 22 starts operating.

In this way, when the lock signal A is transmitted from the portable device 21, the lock signal A is input to the microcomputer 52 via the lock signal receiving section 53 in the vehicle-mounted device 51, and the microcomputer 52 operates. . Then, in step Q ₁ of the flowchart of FIG. 5, the code number superimposed on the lock signal A is compared with the preset code number, and when both code numbers do not match, step Q ₂ is performed. Deactivate. On the other hand, when the above code numbers match, steps Q ₂ to Q ₃ are executed to reset the control variable M to 0, and step Q
_{In step 4} , it is determined whether or not the lock detection switch 61 is ON, that is, whether or not the lock device is locked. Since the lock device is not yet locked at this time, the microcomputer 52 next determines in step Q ₅ whether the control variable M is a predetermined number M ₀ (for example, 4). further since = 0 executes step Q _6, and outputs a locking operation signal h ₁ to the motor driving section 60. Therefore, the first coil 78 in the drive unit 60 is energized, and along with this, the first switch 81 in the power supply circuit 80 of the lock motor 59 is switched to the power supply side, and a current flows in the motor 59 in the X direction. , The motor 59 rotates in the direction to lock the lock device. At the same time, the switching signal g is output to the switch switching unit 57, and the changeover switch 56 is switched to the lock confirmation signal transmitting unit 54 side. At this time, the microcomputer 52 executes the step Q
_{At 7} , the control variable M is incremented by 1.

Then, when the lock device is locked by the rotation of the lock motor 59, the lock detection switch 61 is turned on and the lock detection signal j is input to the microcomputer 52, so that the microcomputer 52 operates in the fifth state.
Perform step Q ₈ Step Q ₄ in the flowchart of FIG outputs a lock confirmation signal B via the lock confirmation signal transmission unit 54. At this time, the changeover switch 5
Since 6 is switched to the lock confirmation signal transmitting section 54 side,
The lock confirmation signal B is transmitted from the antenna 55. Here, when the microcomputer 52 outputs the lock operating signal h ₁ in step Q ₆ and the lock device is not locked due to malfunction of the drive mechanism between the lock motor 59 and the lock device, etc. , Steps Q ₄ to Q _{5 to} Q ₇ are executed again, and the lock operation signal h ₁ is repeatedly output. Then, the malfunction is eliminated locking device executes Step Q ₈ Step Q ₄ when it is locked, the lock confirmation signal B
Is output. However, even if the lock operation signal h ₁ is output M ₀ times in step Q _{6, the} lock device is not locked, and when M = M ₀ , the operation ends.

On the other hand, the microcomputer 22 of the portable device 21 is
After activating the timer in step P ₄ of the flowchart of FIG. ₄ , it is determined in steps P ₅ and P ₆ whether the lock confirmation signal B is received before the set time of the timer has elapsed. That is, when the lock device is locked by the operation of the vehicle-mounted device 51 side and the lock confirmation signal B is transmitted accordingly, the signal B is the lock confirmation signal receiving unit 25 of the portable device 21.
Is input to the microcomputer 22 via. Then code the lock confirmation signal B that has been set in advance as the code number that is superimposed on the locking confirmation signal B input by if it is entered before the lapse of the set time, then step P _7, P ₈ comparing the number, by performing the step P ₉ when I both code numbers match, and outputs a display signal d for causing the lock confirmation displayed on the display unit 26.
In this way, when the lock signal A is transmitted from the portable device 21, the vehicle-mounted device 51 is operated and the lock device is locked, and when the lock confirmation signal B is transmitted from the vehicle-mounted device 51 accordingly, the portable device At 21, the display unit 26 displays that the lock is applied. As a result, a person who has locked the door or the like using the portable device 21 from a place remote from the vehicle can confirm that the door or the like has been locked.

On the other hand, even though the locking signal A is transmitted from the portable device 21 due to a communication failure or a malfunction of the lock device or its drive mechanism on the vehicle side, the in-vehicle device 51 is set within the set time of the timer. If the lock confirmation signal B is not received from the microcomputer 22 of the portable device 21, the microcomputer 22 of the portable device 21 proceeds to step P ₅ of the flowchart of FIG.
To step P ₁₀ from the control variable N to the predetermined number N
It is determined whether it is ₀ (for example, 4). Since this control variable N is initially 0, the microcomputer 22 executes step P ₁₁ to add 1 to the variable N, and also executes step P ₂ and subsequent steps again, and then step P ₂
The transmission operation of the lock signal A by is repeated. Then, the communication incapable state or malfunction state is transient, and while the lock signal A is transmitted several times, the in-vehicle device 51 side normally operates and the lock device is locked and locked. When the confirmation signal B is transmitted, the lock confirmation display in step P ₉ is performed at that point. However, in the case where the communication failure or malfunction is not transient, the lock confirmation signal B cannot be received even if the lock signal A is transmitted in step P ₂ N ₀ times, and N =
When N ₀ is reached, the microcomputer 22 executes steps P ₁₀ to P ₁₂ and causes the display unit 26 to display an error. As a result, the sender can recognize a locking error when it occurs, and it is possible to prevent an increase in the risk of theft by confirming that the locking is performed despite the occurrence of the locking error. .

[Brief description of drawings]

FIG. 1 is an overall configuration diagram of a wireless vehicle security device according to the present invention, FIGS. 2 to 5 show an embodiment of the present invention, FIG. 2 is a configuration diagram of a portable device, and FIG. 4 is a flow chart showing the operation of the portable device, and FIG. 5 is a flow chart showing the operation of the vehicle-mounted device. 1,21 ... Portable device, 11,51 ... In-vehicle device, 17,5
9 ... Locking means (17 ... actuator, 59 ...
Lock motor), A ... Lock signal, B ... Lock confirmation signal.

Claims (1)

[Claims] 1. A lock means for locking an opening / closing body such as a door provided in a vehicle, a portable device for transmitting a lock signal for locking the opening / closing body from a location remote from the vehicle, and a portable device from the portable device. When a lock signal is received, a lock operation signal is sent to the lock means, and a vehicle-mounted device that transmits a lock confirmation signal for notifying that the opening / closing body is locked to the mobile device, and the mobile device, A wireless vehicle security device configured to extend the transmission of the lock signal when the lock confirmation signal from the vehicle-mounted device cannot be received after transmitting the lock signal.