JP2007009625A - Door lock device and door lock method for vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To restrain electric power consumption of a standby power source when a main power source causes failure. <P>SOLUTION: This door lock device has first electronic equipment 21 participating in a lock release of a vehicle door, second electronic equipment 22 without participating the lock release, a first electric power supply means 31 supplying electronic power to the first electronic equipment 21 and the second electronic equipment 22, and a second electric power supply means 32 supplying the electric power only to the first electronic equipment 21 when the first electric power supply means 31 causes failure. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a vehicle door lock device and a door lock method capable of releasing a door lock even when a main power supply fails.

  Conventionally, in order to unlock the door lock without having a cylinder lock on the door, a magnetic field is generated around the vehicle by electric power from a power source provided in the vehicle, and the user carries it using the electric power generated by the magnetic field. A technique is known in which an ID is transmitted from a key, and the door lock is unlocked when the ID matches the ID of the vehicle (see, for example, Patent Document 1). In the above prior art, in order to allow the door to be unlocked even when the main power supply fails, a dedicated standby power supply is used to generate a magnetic field.

JP 2003-262054 A

  However, since the device described in the above publication always uses the power of the standby power supply to monitor whether a user having a key exists around the vehicle, the power consumption is large.

  The vehicle door lock device and the door lock method according to the present invention supply power to the first electronic device involved in unlocking the vehicle door and the second electronic device not involved in unlocking by the first power supply means. When the first power supply means fails, the second power supply means supplies power only to the first electronic device.

  According to the present invention, since the power is supplied from the second power supply means only to the electronic equipment involved in unlocking the vehicle door when the first power supply means fails, the second power supply means Power consumption can be reduced.

  FIG. 1 is a block diagram illustrating a configuration example of a vehicle door lock device according to an embodiment of the present invention. The lock control device 100 is provided in a vehicle, and is configured by connecting an emergency switch 21, a normal control switch 22, a power supply unit 30, and a locking / unlocking mechanism 40 to the controller 10. As described in detail below, in the vehicle door lock device according to the present embodiment, power is supplied from the standby power supply 32 when the main power supply 31 fails, and energization of the normal control switch 22 is prohibited. Only the emergency switch 21 can be energized.

  The power supply unit 30 includes a main power supply 31 and a standby power supply 32, and the standby power supply 32 is connected between the main power supply 31 and the controller 10. When the main power supply 31 is in a normal state, power is supplied from the main power supply 31 to the controller 10, and the power of the main power supply 31 is charged in the battery 33 as the standby power supply 32. When the main power supply 31 fails, the power stored in the battery 33 is supplied to the controller 10. The battery 33 is small, and the battery 33 stores a minimum amount of power in preparation for a failure of the main power supply 31. Therefore, it is necessary to minimize the power consumption of the battery 33 when the main power supply 31 fails.

  The emergency switch 21 is a switch that is operated to release the door lock when the main power supply 31 fails. The emergency switch 21 is operated by a switch button (not shown) provided on the outer surface of the vehicle door. Enter the release command. The normal control switch 22 is a switch unrelated to unlocking, and is a switch that detects a gear position (such as a P range detection switch) or a switch that detects on / off of a parking brake.

  The controller 10 is formed with a transmission circuit 11 that requests the remote controller 50 carried by the user to transmit a signal. The transmission circuit 11 activates the antenna 12 by operating the emergency switch 21 when the main power supply 31 fails. That is, when the emergency switch 21 is operated, the control unit 13 controls the power supplied from the standby power supply 32 to the transmission circuit 11, and a current is passed through the coil to generate a magnetic field from the antenna 12. When the main power supply 31 is normal, the control unit 13 activates the antenna 12 every predetermined time regardless of the operation of the emergency switch 21.

  When the magnetic field generated from the antenna 12 reaches the remote controller 50 outside the vehicle, a current flows through the receiving circuit 51 of the remote controller 50, and the radio signal of the key ID stored in the ROM 52 is transmitted from the remote controller 50 to the controller 10 via an antenna (not shown). Send. The controller 13 of the controller 10 collates the key ID received from the remote controller 50 with the ID stored in the ROM 14, and outputs a locking / unlocking signal when the two match.

  The locking / unlocking mechanism 40 unlocks the vehicle door. The locking / unlocking mechanism 40 has an unlocking motor. When a locking / unlocking signal is output from the control unit 13, the unlocking motor is driven to release the door lock.

  In the present embodiment, in order to suppress the power consumption of the standby power supply 32 when the main power supply 31 fails, only the emergency switch 21 involved in the door lock release is allowed to be energized and the normal control switch not involved in the door lock release. 22 is prohibited. Hereinafter, this point will be described.

  FIG. 2 is a diagram illustrating an internal configuration of the controller 10 that detects the operation of the switches 21 and 22. The regulator 101 converts the predetermined voltage (12V) supplied from the standby power supply 32 into a predetermined voltage (5V). A voltage circuit 102 is connected to the regulator 101, and a voltage circuit 104 is connected in series to the voltage circuit 102 via a transistor 103. The voltage (5 V) of the voltage circuit 102 is distributed to the input circuit 105 of the emergency switch 21, and the voltage (5 V) of the voltage circuit 104 is distributed to the input circuit 106 of the normal control switch 22.

  A standby power supply 32 is connected to the control circuit 107 composed of a CPU or the like. When the main power supply 31 fails and power supply is started from the standby power supply 32, a standby power supply operation signal is input accordingly. The control circuit 107 controls the transistor 103 in response to the standby power supply activation signal. FIG. 3 is a flowchart showing processing in the control circuit 107. In step S <b> 1, it is determined whether or not a standby power supply activation signal is input from the standby power supply 32, that is, whether or not power supply is started from the standby power supply 32 due to a failure of the main power supply 31.

  When the main power supply 31 is not out of order, step S1 is denied and the process proceeds to step S2 to turn on the transistor 103. As a result, a voltage (5 V) is generated by the voltage circuit 104, and energization of the normal control switch 22 is permitted. On the other hand, when the main power supply 31 is out of order, step S1 is affirmed and the process proceeds to step S3 to turn off the transistor 103. As a result, no voltage is generated in the voltage circuit 104, and energization of the normal control switch 22 is prohibited.

The operation of the vehicle door lock device according to the present embodiment is summarized as follows.
(1) Normal state If the main power supply 31 is operating normally, the controller 10 is supplied with power from the main power supply 31, so that no reserve power supply operation signal is input to the control circuit 107 and the transistor 103 is turned on. (Step S2). For this reason, a voltage (5 V) is generated by the voltage circuit 104 and energization of the normal control switch 22 is permitted, and the vehicle can be controlled by the operation of the normal control switch 22. In this state, the antenna 12 is activated every predetermined time, and the key ID is received when the user carrying the remote controller 50 approaches the vehicle. After the ID verification, the door lock is released by the locking / unlocking mechanism 40.

(2) When a failure occurs When a failure occurs in the main power supply 31, a standby power supply activation signal is input to the control circuit 107, and the transistor 103 is turned off (step S3). Therefore, no voltage is generated by the voltage circuit 104, and only the emergency switch 21 can be energized. In this state, the antenna 12 is not activated until the user operates the emergency switch 21. When the antenna 12 is activated by the operation of the switch 21, the key ID is received. After the ID verification, the door lock is released by the locking / unlocking mechanism 40. As a result, the power consumption of the standby power supply 32 can be minimized.

According to the present embodiment, the following operational effects can be achieved.
(1) When the main power supply 31 is out of order, the power from the standby power supply 32 can be supplied only to the components (emergency switch 21, door lock unlocking mechanism 40) involved in the door lock release, and the door lock is released. Is not supplied to parts that are not involved in (such as the normal control switch 22). As a result, even when the main power supply 31 fails, the door lock can be released and the power consumption of the standby power supply 32 can be minimized.
(2) Since the antenna 12 is activated by operating the emergency switch 21 when the main power supply 31 fails, when a door is unlocked by generating a magnetic field around the vehicle and collating with the ID of the remote controller 50 Even power consumption can be minimized.
(3) When the main power supply 31 is normal, that is, when the power is supplied from the main power supply 31 to the controller 10, the antenna 12 is activated every predetermined time, so there is no need to operate the emergency switch 21, and the door Can be easily unlocked.
(4) Since the transistor 103 is controlled according to the standby power supply operation signal indicating the operation of the standby power supply 32, the configuration is easy.
(5) Since the standby power supply 32 is connected between the main power supply 31 and the controller 10 and the power from the main power supply 31 is charged to the standby power supply 32 when the main power supply 31 is normal, the standby power supply 32 is connected to the standby power supply 32 when the main power supply 31 fails. The door lock can be released using the stored electric power.

  In the above embodiment, the control circuit 107 turns off the transistor 103 in response to the standby power supply activation signal, so that the power of the standby power supply 32 is supplied only to the emergency switch 21 without generating a voltage in the voltage circuit 104. However, as long as the power from the standby power supply 32 is supplied only to the electronic equipment involved in the door lock release when the main power supply 31 fails, the configuration of the second power supply means may be any. That is, the second power supply unit is not configured by the standby power source 32 as the power source unit, the control circuit 107 as the detection unit that detects the standby power source activation signal, and the control circuit 107 as the control unit that controls the standby power source 32. May be.

  Although the emergency switch 21 is used as an electronic device involved in unlocking and the normal control switch 22 is used as an electronic device not involved in unlocking, the first electronic device and the second electronic device are not limited thereto. Although the standby power supply 32 is connected between the main power supply 31 and the controller 10 constituting the first power supply means, the circuit configuration is not limited to this. When the emergency switch 21 serving as a lock release detecting means is operated when the main power supply 31 is broken, power is supplied to the remote controller 50 via the antenna 12 serving as a communication circuit, and an ID from the remote controller 50 is received. Although the control unit 13 as the determination circuit collates and releases the door lock, the configuration related to the lock release is not limited to that shown in FIG. For example, the remote control itself may have a power source.

  That is, the present invention is not limited to the vehicle door lock device of the embodiment as long as the features and functions of the present invention can be realized. The above description is merely an example, and when interpreting the invention, there is no limitation or restriction on the correspondence between the items described in the embodiment and the items described in the claims.

It is a block diagram which shows the structural example of the door lock apparatus for vehicles by embodiment of this invention. It is a figure which shows the internal structure of the controller of FIG. 3 is a flowchart illustrating a processing operation in the control circuit of FIG.

Explanation of symbols

10 controller 21 antenna 22 opener switch 23 lock sensor 24 door opening switch 31 latch drive motor 32 lock drive motor 200 remote control

Claims (6)

A first electronic device involved in unlocking the vehicle door and a second electronic device not involved in unlocking;
First power supply means for supplying power to the first electronic device and the second electronic device;
A vehicle door lock device comprising: a second power supply unit that supplies power only to the first electronic device when the first power supply unit fails. The vehicle door lock device according to claim 1,
A communication circuit that communicates with a portable device carried by a user outside the vehicle compartment;
A determination circuit for determining permission / non-permission of unlocking based on a signal from the portable device;
An unlock detection means for detecting a door unlock command from the user,
The second power supply means does not communicate with the portable device until the door lock release command is detected when the first power supply means fails, and the door lock release command is detected. Then, power is supplied to the communication circuit so as to perform communication with the portable device, and power for door lock release is supplied when the determination circuit determines that unlocking is permitted. A vehicle door lock device. In the vehicle door lock device according to claim 1 or 2,
The vehicle door lock device characterized in that the second power supply means stores the power supplied from the first power supply means. In the vehicle door lock device according to any one of claims 1 to 3,
The vehicle door lock device according to claim 2, wherein the second power supply means performs charging when the first power supply means is normal. In the vehicle door lock device according to any one of claims 1 to 4,
The second power supply means includes a power supply unit, a detection unit that detects whether power is supplied from the power supply unit, and a control unit that controls the power supply unit.
The control unit controls the power supply unit so as to supply power only to the first electronic device when the detection unit detects power supply from the power supply unit. . Supplying power to the first electronic device involved in unlocking the vehicle door and the second electronic device not involved in unlocking by the first power supply means;
A vehicle door lock method, wherein power is supplied only to the first electronic device by a second power supply means when the first power supply means fails.

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