JP2009083724A - Anti-theft device for vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To certainly perform steering lock for preventing theft when a roof is in the opened state while uncomfortable feeling of an occupant by operation sound or the like is reduced by preventing unnecessary operation of an electric motor when an anti-theft device for the vehicle for switching the locked/unlocked state of steering by the electric motor is mounted on a convertible or the like in which the roof is openable/closable. <P>SOLUTION: When the roof is in the closed state (NO in step S2), the steering is locked by driving the electric motor (executing step S7) when the opening/closing state of a door is varied after an ignition switch 22 becomes in the off state (YES in step S4). Whereas, when the roof is in the opened state (YES in step S2), steering is locked by driving the electric motor regardless of variation of the opening/closing state of the door after that when the ignition switch 22 becomes in the off state (executing step S7). <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention belongs to a technical field related to a vehicle antitheft device in which a steering lock actuator is driven and controlled to selectively switch a steering between a locked state and an unlocked state.

  In recent years, it has been proposed to install a smart keyless entry system in a vehicle such as an automobile for the purpose of improving operability. In this smart keyless entry system, the passenger can lock / unlock the door by operating the outer door handle of the door or a switch provided in the vicinity thereof while holding the portable device. When the vehicle is present in the vehicle interior, the engine can be started and stopped by operating a push-type or rotary ignition switch provided in the vehicle interior.

On the other hand, in order to ensure the anti-theft property of the vehicle, the vehicle is provided with a steering lock mechanism. This steering lock mechanism is a mechanism that improves theft prevention by restricting the rotation of the steering in the parking state of the vehicle. In the steering lock mechanism of the vehicle having the smart keyless entry system as described above, the steering shaft The lock member that can be engaged and disengaged is driven by a steering lock actuator, and the drive of the actuator is controlled by a control device, so that the lock / unlock state of the steering is switched (for example, Patent Document 1 and Patent Document). 2).
Japanese Patent Laid-Open No. 2001-1865 JP 2003-293923 A

  By the way, from the standpoint of preventing theft of the vehicle, the case where the occupant goes out of the vehicle and parks the vehicle may be considered as a case where the steering lock is particularly required. In this case, the occupant usually switches on the ignition switch. After the vehicle is turned off (that is, after being turned off), the door is opened and closed to exit the vehicle. Therefore, in the anti-theft device that switches the steering lock / unlock state by driving the steering lock actuator as described above, the timing for locking the steering wheel is opened and closed after the ignition switch is turned off. It is conceivable that a change in state is detected. By doing so, the steering actuator can be reliably operated and the steering can be locked in a situation where theft is highly likely, and the actuator operates unnecessarily, and the operating sound makes the passenger feel uncomfortable. Can be prevented.

  However, when the anti-theft device is installed in an open car that can be opened and closed, for example, the occupant operates the ignition switch from outside the vehicle even if the door is closed if the roof is open. For this reason, for example, if the passenger notices that the ignition switch has been forgotten to be turned off and the door is closed and the ignition switch is turned off from outside the vehicle, the locked state as described above At the timing of switching to, the steering cannot be switched to the locked state even though the ignition is turned off and the door is closed and no occupant remains in the passenger compartment, resulting in an increased risk of vehicle theft Problem arises. In addition, in this case, there is a high need for improvement even considering that the roof is open and the risk of vehicle theft is particularly high.

  The present invention has been made in view of such points, and an object of the present invention is to provide a configuration and control method for an anti-theft device mounted on a vehicle capable of opening and closing a roof such as an open car. When the roof is in the open state (when the possibility of theft is particularly high) while preventing unnecessary operation of the steering lock actuator and reducing passenger discomfort due to its operating noise, etc. This is to reliably perform steering lock for theft prevention.

  In order to achieve the above object, according to the present invention, when the vehicle roof is in a closed state, the steering actuator is operated when the opening / closing state of the door changes after the ignition switch is turned off. When the vehicle roof is in the open state, the steering actuator is activated to lock the steering when the ignition switch is turned off regardless of the change in the door open / close state. I made it.

  Specifically, in the invention of claim 1, a lock member that is engaged with and disengaged from the movable member that is interlocked with the steering operation and selectively switches the steering between the locked state and the unlocked state, and the lock member, A vehicle anti-theft device capable of opening and closing a roof, comprising: a steering lock actuator for driving the steering lock / unlock state; and a drive control means for controlling the drive of the actuator. .

  When the steering is unlocked and the roof open / close state detecting means detects the closed state of the roof, the drive control means opens and closes the door after the ignition switch is turned off. When the state detecting means detects a change in the open / closed state of the door, the steering lock actuator is driven to switch the steering to the locked state, while the steering is unlocked and the roof open / closed state is detected. When the open state of the roof is detected by the means, whether or not a change in the open / close state of the door is subsequently detected by the door open / close state detecting means when the ignition switch is turned off. Regardless of the above, the steering lock actuator is driven to It is assumed to be configured to switch the tearing locked.

  With the above configuration, when the steering is unlocked and the roof open / close state detecting means detects the roof closed state, the door open / close state detecting means opens / closes the door after the ignition switch is turned off. When a change in state is detected, the drive control means activates a steering lock actuator to lock the steering.

  As a result, if the occupant performs the normal operation of opening and closing the door with the ignition switch turned off in order to park the vehicle and go out of the vehicle, the steering actuator is activated and the steering is locked. It becomes. On the other hand, if the occupant stays in the passenger compartment for rest etc., the door will not be opened or closed unless the ignition switch is turned off and then the door is closed again by a half door etc. The change in the open / closed state of the door is not detected by the detection means, and therefore, the drive control means does not operate the steering actuator to switch the steering to the locked state.

  Accordingly, it is possible to prevent the steering actuator from operating and the passenger from feeling uncomfortable due to the operation sound even when the possibility of theft is relatively low, such as when the passenger is in the vehicle cabin. In a situation where the occupant is out of the vehicle and is relatively likely to be stolen, the steering actuator can be actuated to securely lock the steering, and the vehicle can be reliably prevented from being stolen. Become.

  On the other hand, when the roof open / closed state detecting means detects the open state of the roof, whether or not the door open / closed state detecting means subsequently detects a change in the door open / closed state when the ignition switch is turned off. Regardless, the drive control means actuates the steering actuator to lock the steering.

  As a result, when the occupant parks the vehicle and goes out of the vehicle in a situation where the risk of theft of the vehicle is further increased because the roof is open and the vehicle can easily enter the passenger compartment. The steering can be locked by reliably operating the steering actuator. In other words, the occupant can operate the ignition switch from the outside of the vehicle even when the door is closed if the roof is open. For example, when the passenger gets off the vehicle and closes the door, and then turns off the ignition switch (ie, when the vehicle is turned off), the steering actuator does not operate. Although the occupant is out of the vehicle, the steering is not locked, and the risk of vehicle theft increases. However, according to the present invention, when the ignition switch is turned off, the steering actuator is operated and the steering is locked even if the door is not opened or closed thereafter. Therefore, the steering lock when the roof is in the open state can be performed more reliably than in the case where the roof is in the closed state, and vehicle theft can be reliably prevented.

  According to a second aspect of the present invention, in the vehicle antitheft device according to the first aspect of the present invention, the vehicle antitheft device further comprises occupant detection means for detecting the presence of an occupant in the passenger compartment of the vehicle. When the steering is unlocked and the roof open / close state detecting means detects the roof open state, the ignition switch is turned off and the passenger detecting means It is assumed that the steering lock actuator is driven to switch the steering to the locked state when no occupant is detected.

  With this configuration, when the roof open / closed state detecting means detects the roof open state, the drive control means is turned on when the ignition switch is turned off and the occupant detecting means detects the occupant. The actuator is driven to switch the steering to the locked state. Therefore, even when the ignition switch is off, when the occupant detection means detects an occupant in the vehicle compartment, the drive control means does not drive the steering actuator, and therefore the steering is locked. There is no switching. For this reason, the steering actuator operates unnecessarily despite the presence of an occupant in the passenger compartment, that is, although the possibility of vehicle theft is relatively low, and the occupant feels uncomfortable due to the operating noise, etc. This can be prevented more reliably.

  According to a third aspect of the present invention, in the first or second aspect of the present invention, the vehicle further includes vehicle stop state detection means for detecting the stop state of the vehicle, and the drive control means is configured to stop the vehicle by the vehicle stop state detection means. Unless steering is detected, it is assumed that drive control of the steering actuator for switching the steering from the unlocked state to the locked state is not performed.

  According to this configuration, the steering is not switched from the unlocked state to the locked state unless the vehicle stop state is detected by the vehicle stop state detecting means. Therefore, the steering is locked even though the vehicle is in the traveling state. Can be prevented. Specifically, for example, when an occupant parks the vehicle on a slope or the like with the ignition switch turned off, and the vehicle starts moving due to its own weight while resting, the steering actuator is caused by a malfunction of the door opening / closing detection means. The steering is switched from the unlocked state to the locked state, that is, it is possible to prevent the steering operation of the vehicle from becoming impossible. Therefore, by mounting the antitheft device on the vehicle, it is possible to prevent the safety of the vehicle from being lost due to the steering being locked despite the situation where the steering operation is necessary.

  As described above, according to the antitheft device for a vehicle capable of opening and closing the roof according to the present invention, when the vehicle roof is in a closed state, the open / close state of the door is changed after the ignition switch is turned off. In some cases, the steering actuator is activated to lock the steering, while the vehicle roof is open, the steering switch is turned off when the ignition switch is turned off regardless of the door open / closed state. Actuating the actuator to lock the steering prevents unnecessary operation of the steering actuator and reduces occupant discomfort due to its operating noise, etc., while the roof is open, causing theft Secure the steering lock to prevent theft in situations where there is a high probability of Door can be.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

  FIG. 1 shows a configuration of a vehicle antitheft device 1 according to an embodiment of the present invention. This anti-theft device 1 is mounted on an open car or the like that can open and close a roof, and is a keyless entry device capable of locking / unlocking a door and starting an engine 5 without using a mechanical key. 2 and a steering lock device 3 that disables the steering operation by disabling the steering shaft 7 that is a movable member interlocked with the steering operation. Here, the engine 5 is controlled by an engine control unit (ECU) 6. The switching of the open / close state of the roof is performed by operating a roof open / close device (not shown) by a passenger operating a roof open / close switch (not shown) provided on the instrument panel of the vehicle.

The keyless entry device 2 includes a first control unit 10 and a first driver 11. The first control unit 10 includes a CPU 10a that performs information processing, a ROM 10b that stores programs and data, a RAM 10c that functions as a main storage device of the CPU 10a and provides a work area to the CPU 10a, and an EEPROM (electrically erasable).
programable ROM) 10d. The EEPROM 10d stores the current locked / unlocked state of the steering shaft 7 and stores a predetermined identification code in advance.

The first control unit 10 includes a first driver 11, a push-type or rotary-type ignition switch 22, a roof sensor 23 as a roof open / close state detection means for detecting the open / close state of the roof, and the interior of the seat of the driver's seat And is electrically connected to the seat sensor 24 serving as an occupant detection means for detecting the presence of an occupant in the driver's seat, the ECU 6, the door lock control unit 41, and a second control unit 30 described below, and It is configured to be able to wirelessly communicate with the portable device 21 that wirelessly transmits the same identification code as that stored in the EEPROM 10 d of the first control unit 10. Then, the power (electric power) of the battery 20 is supplied to the first control unit 10 and the first driver 11, and the first driver 11 is controlled by the first control unit 10, and the power supply is steered from the first driver 11. It is supplied to a second control unit 30 and a second driver 31 (to be described later) in the apparatus 3 so that supply can be stopped. The power is supplied from the first control unit 10 to the ECU 6 and the anti-lock brake system (ABS) 51 so that supply can be stopped. Further, the power is supplied from the first control unit 10 to the door lock control unit 41 and switches 43 to 45 described later, and can be stopped from the door lock control unit 41 to the door lock actuator 42 described later. Supplied.

The ABS 51 controls the braking force of the braking device so as to suppress the wheel lock at the time of braking of the vehicle, and has a vehicle speed detector 52 that detects the traveling speed of the vehicle. In this embodiment, the vehicle speed detection unit 52 constitutes a vehicle stop state detection unit that detects the stop state of the vehicle, and the vehicle speed is 0 (even if the vehicle speed is not exactly 0, the vehicle speed is substantially It is the maximum value that can be assumed to be 0, and may be, for example, 4 km / h or less), and it is detected that the vehicle is in a stopped state. The vehicle speed detection unit 52 may be configured by a general vehicle speed sensor, or may estimate the vehicle speed from the speed of each wheel detected by each wheel speed sensor that detects the speed of each wheel. .

  The door lock control unit 41 controls the drive of a door lock actuator 42 that locks / unlocks the door of the vehicle. The door lock control unit 41 controls the door lock actuator 42 based on a command from the first control unit 10. It is driven by supplying the power. The door lock control unit 41 includes a door open / close state detection switch 43 that detects the open / close state of the door, a door lock / unlock state detection switch 44 that detects the lock / unlock state of the door, and an outer door of the door. A door lock / unlock switch 45 provided at the handle or in the vicinity thereof is connected, and information from each of the switches 43 to 45 is input to the door lock control unit 41, and further from the door lock control unit 41 to the first Input to the control unit 10.

  The door lock / unlock state detection switch 44 is provided on the vehicle compartment side of the door of the vehicle and is operated by an occupant of the vehicle to lock / unlock the door or an interlocking member interlocked with the lock knob ( For example, the lock / unlock state of the door is detected by detecting the operating position of a link member that connects the lock knob and the lock mechanism), and when the vehicle occupant directly operates the lock knob. Even when the door-locking actuator 42 is driven, the lock knob and the interlocking member are operated to detect the locked / unlocked state of the door.

  The first control unit 10 constitutes an in-vehicle device that is mounted on a vehicle and receives an identification code from the portable device 21, and the identification code received by the first control unit 10 is stored in advance in the EEPROM 10d. The door can be locked / unlocked when it coincides with the identification code, and when the occupant operates the door lock / unlock switch 45 in this state, the door lock / unlock switch 45 switches to the first control unit 10. A lock instruction for locking the door or an unlock instruction for unlocking is transmitted, and the first control unit 10 receives this instruction, and the door lock actuator 42 via the door lock control unit 41 according to the instruction. To lock / unlock the door. Note that a lock instruction or an unlock instruction may be transmitted to the first control unit 10 by operating a passenger's operation switch from a portable device having an operation switch for locking / unlocking the door.

  Further, the first control unit 10 is configured to switch the ignition switch when the identification code received by the first control unit 10 matches the identification code stored in the EEPROM 10d in a state where the portable device 21 is present in the passenger compartment. 22 can be turned on. That is, the on-vehicle control device including the engine 5 can be operated. As described above, the first control unit 10 and the portable device 21 are mounted on the vehicle when the identification code received by the first control unit 10 matches the identification code stored in the first control unit 10 in advance. A so-called smart keyless entry system that enables operation of the control device is configured.

  In the smart keyless entry system, when the occupant of the vehicle operates the door lock / unlock switch 45 while holding the portable device 21 to get into the vehicle, the door is unlocked, the door is opened and the vehicle is opened. When entering the room, the ignition switch 22 can be turned on. Then, the engine 5 is started by operating the ignition switch 22 to turn it on.

  On the other hand, when the occupant turns off the ignition switch 22 after the vehicle stops, gets off the vehicle while holding the portable device 21, closes the door, and operates the door lock / unlock switch 45, the door is locked. .

  The door can be locked / unlocked by inserting and turning the mechanical key into the key slot provided on the outside of the door of the vehicle so that it can cope with a failure of the portable device 21 or a battery exhaustion. The engine 5 can be started by inserting the mechanical key into a key slot provided in the steering column and turning it.

  The steering lock device 3 includes a second control unit 30, a second driver 31, a drive mechanism 33 including an electric motor 32 as a steering lock actuator, and a lock member 34. The second control unit 30 includes a CPU 30a that performs information processing, a ROM 30b that stores programs and data, a RAM 30c that functions as a main storage device of the CPU 30a and provides a work area to the CPU 30a, and an EEPROM 30d. . The EEPROM 30d stores the current lock / unlock state of the steering shaft 7.

  The second control unit 30 is electrically connected to the first control unit 10, the first driver 11, and the second driver 31, and is in a locked / unlocked state stored in the EEPROM 30d to the first control unit 10. Send information. The first control unit 10 stores this information in the EEPROM 10d. The second driver 31 is controlled by the second control unit 30 so that the power is supplied from the second driver 31 to the electric motor 32 so that the supply can be stopped. The electric motor 32 is driven while the power is supplied to the electric motor 32.

  The lock member 34 is engaged with and disengaged from an engaged portion 7a (concave portion) provided on the steering shaft 7 to selectively switch the steering shaft 7 (that is, the steering) between a locked state and an unlocked state. The electric motor 32 drives the lock member 34 so that the lock / unlock state of the steering shaft 7 is switched. The drive mechanism 33 includes a gear that transmits the output of the electric motor 32 to the lock member 34.

  The power of the battery 20 is supplied to the first control unit 10, the first driver 11, the roof sensor 23, the seat sensor 24, the door lock control unit 41, and the switches 43 to 45 when the ignition switch 22 is in the OFF state. However, the second control unit 30, the second driver 31, and the ABS 51 are not basically supplied. However, when it is time to drive the electric motor 32 as described later, the power is supplied to the second control unit 30, the second driver 31, and the ABS 51, and the second driver 31 is controlled by the second control unit 30. When the electric power is supplied to the electric motor 32 and the driving of the electric motor 32 is completed, the first control unit 30 receives information indicating the completion (update information of the EEPROM 10d described later) from the second control unit 30. Then, the power supply to the second control unit 30, the second driver 31, and the ABS 51 is stopped. Note that when the ignition switch 22 is in the off state, the power is not always supplied to the ECU 6, but is supplied when the ignition switch 22 is in the on state. Further, when the ignition switch 22 is turned on, the power is supplied to the second control unit 30, the second driver 31, and the ABS 51.

The first control unit 10 outputs to the second control unit 30 a command to switch the steering shaft 7 from one of the locked state and the unlocked state to the other at a timing described later. In response, the electric motor 32 is driven via the second driver 31, and the lock member 34 is engaged with the engaged portion 7a and is unlocked from the engaged portion 7a. Move from one to the other. Thus, the first and second control units 10 and 30 constitute drive control means for controlling the drive of the electric motor 32 (steering lock actuator). Then, when the switching of the lock / unlock state of the steering shaft 7 is completed, the second control unit 30 stops the power supply to the electric motor 32 and stores the lock / unlock state information stored in the EEPROM 30d. And the update information is transmitted to the first control unit 10.

  The first and second control units 10 and 30 operate as follows when the steering shaft 7 is switched from the unlocked state to the locked state.

  That is, in the first control unit 10, when the steering shaft 7 is in the unlocked state and the roof closed state is detected by the roof sensor 23, the off state of the ignition switch 22 indicates that the control unit 10 And when the change of the door open / close state is detected by the door open / close state detection switch 43, a lock command for switching the steering shaft 7 to the lock state is output to the second control unit 30, The control unit 30 drives the electric motor 32 to switch the steering shaft 7 from the unlocked state to the locked state.

  On the other hand, when the roof sensor 23 detects the open state of the roof, the first control unit 10 detects that the ignition switch 22 is turned off by the control unit 10 and the seat sensor 24 detects the interior of the vehicle. A second lock command for switching the steering shaft 7 to the locked state regardless of whether the door open / close state detection switch 43 detects a change in the door open / close state after the detection. The second control unit 30 drives the electric motor 32 to switch the steering shaft 7 from the unlocked state to the locked state.

  As described above, when the vehicle occupant operates the door lock / unlock switch 45 while holding the portable device 21 to get into the vehicle, the door is unlocked, but the first control unit 10 At the timing, or at the same time when the door is changed from the closed state to the open state, the power is supplied to the second control unit 30, the second driver 31, and the ABS 51, and the steering shaft 7 is unlocked from the locked state. An instruction to switch to the state is output to the second control unit 30. When the steering shaft 7 is in a locked state and the ignition switch 22 is turned on, the power is supplied to the second control unit 30, the second driver 31, and the ABS 51, and the steering shaft 7 is unlocked. An instruction to switch to the state is output to the second control unit 30 so that the steering shaft 7 is switched to the unlocked state.

  Further, the first control unit 10 is configured not to output the lock command for switching the steering shaft 7 to the locked state to the second control unit 30 unless the vehicle speed detection unit 52 detects the vehicle stop state. That is, the first control unit 10 determines the stop state of the vehicle based on the detection information from the vehicle speed detection unit 52, and determines the second control unit 30 unless it determines that the vehicle is in the stop state. The above lock command is not output.

  The first control unit 10 stops the power supply to the second control unit 30, the second driver 31, and the ABS 51 when the ignition switch 22 changes from the on state to the off state. When the door open / close state detection switch 43 detects that the door open / close state has been changed (the door has changed from the open state to the closed state) while the ignition switch 22 is kept off, The power of the battery 20 is supplied to the second control unit 30, the second driver 31 and the ABS 51. Then, the ABS 51 is activated, the vehicle speed detection unit 52 detects the vehicle speed, and the vehicle speed information from the ABS 51 is input to the first control unit 10. Therefore, for example, when the ignition switch 22 is off and the door is not opened and closed for a long time, the power supply to the ABS 51 and the like can be stopped, and the battery can be prevented from rising due to an increase in dark current. When the open / closed state of the door changes, power can be supplied to the ABS 51 to obtain vehicle speed information, and the vehicle stop state can be appropriately determined.

  The operation of switching the steering shaft 7 to the locked state in the first control unit 10 will be described with reference to the flowchart of FIG.

  In the first step S1, it is determined whether or not the ignition switch is in an OFF state. If the determination in step S1 is NO, the process in step S1 is repeated, while if the determination in step S1 is YES, step S2 is performed. Proceed to

  In step S2, it is determined whether or not the roof sensor 23 has detected the open state of the roof. If this determination is NO, the process proceeds to step S3, and if YES, the process proceeds to step S9.

  In step S3, power supply to the second control unit 30, the second driver 31, and the ABS 51 is stopped.

  In step S4, it is determined whether or not the door open / closed state detection switch 43 detects a change from the open state to the closed state. If this determination is YES, the process proceeds to step S5. If NO, the process proceeds to step S5. Return to step S1.

  In step S5, the power is supplied to the second control unit 30, the second driver 31, and the ABS 51.

  In step S6, it is determined whether or not the vehicle is in a stopped state. If this determination is YES, the process proceeds to step S7, and if this determination is NO, the process proceeds to step S10.

  In step S <b> 7, a command to switch the steering shaft 7 to the locked state is output to the second control unit 30.

  In step S8, power supply to the second control unit 30, the second driver 31, and the ABS 51 is stopped, and the switching process is terminated.

  In step S9 which advances to YES in step S2, it is determined whether or not there is no occupant remaining in the vehicle interior of the vehicle. If this determination is YES (when it is determined that no occupant remains in the vehicle interior). Advances to step S5, and if NO, returns to step S1.

  In step S10 which proceeds in the case of NO in step S6, a predetermined time from the start of power supply in step S5 (a maximum time considered to travel with the ignition switch 22 turned off or a time during which damage to the battery 20 can be suppressed, For example, about 30 minutes have elapsed. If this determination is NO, the process returns to step S6, whereas if YES, the process returns to step S3.

  As described above, in the above-described embodiment, the first control unit 10 determines that the steering shaft 7 is in the unlocked state and the roof closed state is detected by the roof sensor 23 (when the determination in step S2 is NO). ) Is detected by the control unit 10 (determined as YES in step S1), and the door open / close state detection switch 43 detects a change in the open / close state of the door after the detection. (When the determination in step S4 is YES), a lock command for switching the steering shaft 7 to the locked state is output to the second control unit 30, and the second control unit 30 drives the electric motor 32 to drive the steering shaft. 7 is switched from the unlocked state to the locked state (the process of step S7 is executed).Accordingly, when the occupant performs a normal operation of opening and closing the door with the ignition switch 22 turned off in order to park the vehicle and go out of the vehicle, the second command received from the first control unit 10 is received. The electric motor 32 is driven by the control unit 30 and the steering shaft 7 is locked. On the other hand, when the occupant stays in the passenger compartment for rest or the like, the door open / close state detection switch 43 opens / closes the door unless the ignition switch 22 is turned off and then the door is closed again by a half door or the like. No change in state is detected (determined as NO in step S4), and therefore the steering shaft 7 is not locked (the electric motor 32 is not driven). Therefore, the electric motor 32 operates and the operation sound (the lock member 34 and the steering shaft 7 due to the operation of the electric motor 32) even when the possibility of theft is relatively low such as when the occupant is in the passenger compartment. In the situation where the passenger feels uncomfortable due to the contact noise, etc., and the passenger is out of the vehicle and is likely to be stolen, the electric motor 32 is operated reliably. The steering shaft 7 can be reliably locked, and the vehicle can be prevented from being stolen.

  Moreover, in the said embodiment, when the open state of a roof is detected by the roof sensor 23 (when determination of step S2 is YES), the 1st control unit 10 is the control unit 10 of ignition switch 22 of this. When an off-state is detected (YES in step S1) and no occupant in the vehicle compartment is detected by the seat sensor 24 (when the determination in step S9 is YES), the door is opened and closed after the detection. Regardless of whether or not a change in the door open / close state is detected by the state detection switch 43 (without executing the process of step S4), a lock command for switching the steering shaft 7 to the locked state is sent to the second control unit 30. The second control unit 30 drives the electric motor 32 to lock the steering shaft 7 from the unlocked state. It switched to the state (the process of step S7 to execute).

  Accordingly, in a situation where the risk of theft of the vehicle is further increased because the roof is open and the vehicle can easily enter the vehicle interior, the steering shaft 7 can be reliably locked to prevent theft of the vehicle. it can. That is, the occupant can operate the ignition switch 22 from the outside of the vehicle even when the door is closed if the roof is open. If the timing for outputting the lock command is the same as that when the roof is in the closed state, for example, the passenger notices that the ignition switch 22 is forgotten to turn off after the passenger gets off the vehicle, and the door is closed. When the ignition switch 22 is turned off from outside the vehicle (when the determination in step S1 is YES), the subsequent change in the door open / close state is not detected (because the determination in step S4 is not YES). The lock command is not output from the first control unit 10 to the second control unit 30, and as a result, the occupant It is not possible to lock the steering shaft 7 in spite of the fact that out on both outer, and that the risk of vehicle theft increases. However, in the above embodiment, when the ignition switch 22 is turned off, the lock command is output from the first control unit 10 to the second control unit 30 even if the door is not subsequently opened and closed, and the steering shaft 7 Can be locked. Therefore, the steering shaft 7 can be reliably locked when the roof is in the open state, and the vehicle can be more securely prevented from being stolen.

  In the above embodiment, the first control unit 10 issues a lock command for switching the steering shaft 7 to the locked state unless the vehicle speed detection unit 52 detects the vehicle stop state (unless the determination in step S6 is YES). It is not output to the second control unit 30 (the process of step S7 is not executed). In other words, the steering shaft 7 is not switched to the locked state unless the vehicle speed detection unit 52 detects the stop state of the vehicle.

  As a result, the steering shaft 7 can be prevented from being locked even when the vehicle is in a running state. Therefore, the steering shaft 7 can be locked to prevent theft of the vehicle while sufficiently ensuring the safety of the vehicle. / Unlock can be switched.

(Other embodiments)
The configuration of the present invention is not limited to the above embodiment, but includes various other configurations. That is, in the above embodiment, the seat sensor 24 for detecting an occupant in the passenger compartment of the vehicle is provided, but it is not always necessary to provide it. In this case, in the first control unit 10, the process of step 9 is abolished, and if it is determined YES in step S2 (that is, if it is determined that the roof is in the open state), the process proceeds to step S5. do it. By doing so, it is possible to reduce the control processing load in the first control unit 10, and it is possible to reduce the number of parts by eliminating the sheet sensor 24 and to reduce the cost.

  Further, in the above-described embodiment, the switching of the opening and closing of the roof is performed by the roof opening and closing device that operates in response to the operation of the roof opening and closing switch of the occupant. The occupant may be able to open and close the roof manually.

  Moreover, in the said embodiment, although the 1st control unit 10 comprises the vehicle equipment of a smart keyless entry system, it is not necessarily required to employ | adopt this system.

  The present invention is useful for a vehicle antitheft device in which the steering lock / unlock state is switched by a steering lock actuator, and particularly useful when the antitheft device is mounted on a vehicle whose roof can be opened and closed. is there.

It is a block diagram which shows the structure of the antitheft device of the vehicle which concerns on embodiment of this invention. It is a flowchart which shows the switching process operation | movement to the locked state of the steering shaft in a 1st control unit.

Explanation of symbols

1 Anti-theft device 7 Steering shaft (movable member linked to steering operation)
10 First control unit (drive control means)
22 Ignition switch 23 Seat sensor (occupant detection means)
24 Roof sensor (roof open / closed state detection means)
30 Second control unit (drive control means)
32 Electric motor (steering lock actuator)
34 Lock member 43 Door open / closed state detection switch (door open / closed state detection means)
52 Vehicle speed detector (vehicle stop state detection means)

Claims (3)

A lock member that engages / disengages with respect to a movable member that is interlocked with the steering operation to selectively switch the steering between a locked state and an unlocked state, and the lock member is switched between the locked / unlocked state of the steering. An antitheft device for a vehicle capable of opening and closing a roof, comprising a steering lock actuator for driving the actuator and a drive control means for controlling the drive of the actuator,
Door opening / closing state detecting means for detecting the opening / closing state of the vehicle door;
An ignition switch operated by a vehicle occupant,
A roof open / close state detecting means for detecting the open / close state of the roof of the vehicle,
The drive control means detects the door open / close state after the ignition switch is turned off when the steering is unlocked and the roof open / close state detection means detects the roof closed state. When a change in the opening / closing state of the door is detected by the means, the steering lock actuator is driven to switch the steering to the locked state, while the steering is in the unlocked state and the roof opening / closing state detecting means When the open state of the roof is detected, whether or not a change in the open / close state of the door is detected by the door open / close state detecting means when the ignition switch is turned off is determined. Without driving the steering lock actuator, Anti-theft device for a vehicle, characterized by being configured to switch the grayed locked. The vehicle antitheft device according to claim 1,
Further comprising occupant detection means for detecting the presence of an occupant in the interior of the vehicle,
When the steering is unlocked and the roof open / close state detecting means detects the roof open state, the drive control means turns off the ignition switch and the occupant detecting means An anti-theft device for a vehicle, characterized in that, when an occupant in a vehicle compartment is not detected, the steering lock actuator is driven to switch the steering to a locked state. The vehicle antitheft device according to claim 1 or 2,
The vehicle further includes a vehicle stop state detection means for detecting the vehicle stop state,
The drive control means is configured not to perform drive control of a steering actuator for switching the steering from the unlocked state to the locked state unless the vehicle stop state detecting means detects the stop of the vehicle. A vehicle antitheft device characterized by the above.

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