JPH046572B2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a vehicle theft prevention device.
In particular, it relates to an anti-theft device that makes it difficult to move a vehicle.

[Prior Art] Various techniques have become known as conventional anti-theft devices for vehicles. For example, it was featured in the January issue of the American magazine "MOTOR TREND'84".

For example, a method of installing a switch to cut off power to an ignition switch, a method of installing a pin switch on a door, hood, trunk, etc. and setting off an alarm when these are opened, and a method of detecting broken glass are introduced. has been done.

On the other hand, the tools used for theft are also introduced, and if these tools are used, they can be used to make modern vehicles.
It states that 90% of the locks can be unlocked.

[Problems to be Solved by the Invention] As can be seen from the above-mentioned documents, the anti-theft sensor itself is prevented from becoming public knowledge as much as possible, and the information for producing tools that disable the anti-theft sensor is not disclosed. It is preferable not to give it to any third party. However, as long as vehicles become common vehicles for the general public,
Even if it is not publicly known in the literature, anyone can obtain the actual product, and it can be used as an anti-theft device for vehicles.
It's not a deciding factor.

Further, conventional anti-theft devices for vehicles generally sound an alarm and display a message to that effect if the anti-theft sensor is activated without being released. and,
Since the audible alarm and display to notify theft were activated only at the location where the theft occurred, the thief would be able to quickly shut off the audible alarm and display to notify the theft. You can escape by riding the target vehicle.

Therefore, in order to solve the above-mentioned problems, the present invention increases the reliability of the anti-theft set, allows third parties such as thieves to visually see that it is difficult to get into the vehicle, and prevents the driver from driving when the vehicle is illegally boarded. The object of the present invention is to provide a vehicle anti-theft device which prevents theft and also stops the engine when an unauthorized person is forcibly boarded the vehicle.

[Means for Solving the Problems] The vehicle anti-theft device according to the present invention includes: theft detection setting means for outputting a signal for setting the inside of the vehicle to a theft monitoring state by the theft detection means provided in the vehicle; a theft monitoring condition determining means for obtaining an output of the theft detecting means, using the theft detecting means to obtain a detection output indicating that an occupant is missing from the vehicle, and determining a condition for starting theft detection; The steering restraint means narrows the distance between the seat and the steering wheel to make it difficult to sit, and the theft detection is performed based on the output of the theft monitoring condition determining means. a restoring means for restoring the distance between the seat and the steering wheel to the set position by a release output of the setting means; and a restoring means that stops the fuel supply when the vehicle is moved in a state where the release output of the theft detection setting means is not output. and a means for stopping.

[Function] The vehicle anti-theft device of the present invention is provided in a vehicle, obtains the output of the theft detection means for detecting the presence of a person in the vehicle, and uses the theft detection means to detect when the occupant is missing from the vehicle. Obtaining a detection output, starting the theft detection, moving the seat forward, tilting the seat back forward, lowering the tilt function of the steering wheel, and increasing the telescopic function by any one or a combination of the following: To make it difficult to sit down by narrowing the distance between a seat and a steering wheel, and to prevent normal driving even if a third party gets in the car illegally. Further, when the vehicle is moved in a state where the release output of the theft detection setting means is not output, the fuel supply is stopped. Then, when the owner of the vehicle properly cancels the theft detection setting means, the distance between the seat and the steering wheel is restored to the set position.

[Embodiment] FIG. 1 is an explanatory diagram showing a basic circuit of a vehicle anti-theft device according to an embodiment of the present invention.

In the figure, a microcomputer MPU1 constitutes a vehicle theft prevention control circuit.
The microcomputer MPU1 may be a one-chip microcomputer dedicated to the vehicle anti-theft device, or it may be a one-chip microcomputer used for other control purposes. Microcomputer in this example
MPU1 has a backup power supply BE, so even if the power necessary for controlling microcomputer MPU1 is cut off, microcomputer MPU1
The built-in memory maintains its storage state without being cleared. Further, power is always supplied to the microcomputer MPU1 from the battery BT regardless of the state of the ignition switch IG. The microcomputer MPU1 of this embodiment is dedicated to a vehicle anti-theft device.

Door unlock switch rear right side Dr and rear left side D1, passenger side Dp and driver side
Dd is connected to the input ports P1 to P4 of the microcomputer MPU1, and its contact closes when the door lock is in the unlocked state. Therefore, when the door lock is unlocked, the input ports P1 to P4 are "L" (low level), and when the door lock is locked, the pull-up resistors R1 to R4 are low.
As a result, the input ports P1 to P4 become "H" (high level).

This type of door unlock switch is known from Japanese Utility Model Application Laid-open No. 60-125436.

Here, the possible states of the door unlock switch will be briefly explained.

The door unlock switch has a lock position where the door lock device is locked, an unlock position where the door lock device is unlocked, and a neutral position where the key is inserted into and removed from the key cylinder. Alternatively, when the force applied to the key is released after turning to the unlocked position, the key cylinder returns to the neutral position by the biasing force of the built-in spring. These are used by the theft monitoring condition determining means of this embodiment to determine whether all doors are in the locked state.

The unlatched state from the inside open handle, the unlatched state from the outside open handle, the locked/unlocked state from the inside locking knob, and the locked/unlocked state from the outside locking knob can be operated. At this time, the unlatched state is
A latched state in which the door is closed and cannot be opened is a state in which the door is opened by operation. The locked/unlocked states are a state in which the door is locked and a state in which the door is unlocked.

The rear right side Cr, rear left side Cl, passenger side Cp, and driver side Cd of the courtesy switches are switches that are turned on when the door is opened, and when the aforementioned courtesy switches Cr and Cl and Cp and Cd are turned on, the room lamp is turned on. lights up. At this time, the car access switch is activated only when the driver's door is open.
Cd is closed and the input port P7 of the microcomputer MPU1 is set to "L". Further, the courtesy switch Cp is closed only when the passenger door is open, and the input port P6 of the microcomputer MPU1 is set to "L".

The reed switch LS detects the rotation speed of the wheel, and the on/off signal of the reed switch LS is input to the input port P19 of the microcomputer MPU1.

Sr on the rear light side of the seat switch as the theft detection means of this embodiment for detecting the presence of a person in the vehicle
and rear left side SL, passenger side SP and driver side
Sd closes its contacts when an occupant is seated, and opens the contacts to input "H" to the input ports P10 to P13 of the microcomputer MPU1 when no occupant is present.

The key position switch has a contact that closes when the key is inserted into the ignition switch IG, and at this time, "L" is input to the input port P14 of the microcomputer MPU1.

The keyless entry device consists of a keyless entry transmitter KT and a key female entry receiver KR. When a locking operation is performed from the keyless entry transmitter KT, the LOCK signal of the input port P16 of the microcomputer MPU1 goes to "H" and unlocks. When the lock is operated, input port P15 UNLOCK is activated.
The signal becomes "H". At this time, the LOCK signal and
The UNLOCK signals never become "H" at the same time. When no locking or unlocking operation is performed from the keyless entry transmitter KT, the LOCK signal and UNLOCK signal become "L" at the same time.

The key cylinder switch KSP on the passenger side is a switch that is linked to the key cylinder attached to the outside of the car door, and is not linked to the door lock knob inside the car. When the locking operation is performed, the input port P16 of the microcomputer MPU1
When the LOCK signal goes "L" and an unlocking operation is performed, the UNLOCK signal of input port P15 goes "L"
become. In addition, in the control described later, input port P1
Although only the UNLOCK signal of input port P16 is used, if the LOCK signal of input port P16 is used, the above
This is a negative signal for the UNLOCK signal. Either one may be used in this embodiment.

The key cylinder switch KSD on the driver's side is a switch that is linked to the key cylinder attached to the outside of the vehicle door, and is not linked to the door lock knob inside the car. When the lock operation is performed, input port P18 of microcomputer MPU1
When the LOCK signal goes "L" and an unlocking operation is performed, the UNLOCK signal of input port P17 goes "L"
become.

A keyless entry device consisting of a keyless entry transmitter KT and a keyless entry receiver KR, a key cylinder switch passenger side KSP,
The KSD on the driver's seat side of the key cylinder switch constitutes theft detection setting means that outputs a signal to put the inside of the vehicle in the theft monitoring state in this embodiment.

When the "H" SET signal is output from the output port P20 of the microcomputer MPU1 that constitutes the control circuit for driving the electric seat, the seat control device advances the seat SE and brings the seat reclining SEB forward. When the seat clining SEB comes into contact with the steering wheel ST,
For advancing seat SE or seat climbing
Since the drive motor of SEB will be overloaded, the SEB for advancing the seat SE or for reclining the seat SEB will be overloaded.
The drive motor drives seat SE and seat recliner SEB until an overload condition is detected.
At this time, it memorizes how much the motors for advancing the seat SE and driving the seat reclining SEB have been rotated. The motors for advancing the seat SE and driving the seat reclining SEB have a magnet and a Hall element attached to their rotating shafts, and convert the rotational speed of the rotating shaft into a pulse number and store it.

In addition, when the RESET signal "H" is output from the output port P21 of the microcomputer MPU1, the seat SE and seat reclining SEB
Moves back, seat SE and seat recline
Return SEB to its original position. At this time, both motors are reversed by the number of revolutions of the motors for advancing the seat SE and driving the seat reclining SEB, which were stored when the SET signal was "H".

Regarding this type of seat control device, Japanese Patent Laid-Open Nos. 56-138024 and 57
It is publicly known from Publication No.-7737.

The tilt and telescopic steering control device is a control device for driving tilt and telescopic steering. When the output port P22 of the microcomputer MPU1 becomes "H" as the SET signal, the tilt is driven downward and the telescope is driven in the longitudinal direction.
As in the case of driving the seat reclining, one of the driving motors is driven until it becomes overloaded. At this time, the rotational speed of both drive motors is also stored. RESET of output port P23
When the signal becomes "H", the tilt and telescope return to their original positions. Then, when the SET signal of the output port P22 is "H", the two drive motors are reversely rotated by the number of revolutions of the two drive motors stored. Regarding this type of tilt and telescopic steering control device, there is Japanese Patent Application No. 60-215298, which is an earlier application filed by the present applicant.

When the SET signal of the output port P24 of the microcomputer MPU1 becomes "H", the fuel cutoff control device closes a valve disposed in the fuel supply system leading from the fuel tank to the engine, and stops the supply of fuel to the engine. When the RESET signal of the output port P25 of the microcomputer MPU1 becomes "H", a valve disposed in the fuel supply system is opened and fuel is supplied to the engine.

Output port P of microcomputer MPU1
The drive circuit for the buzzer BZ connected to 26 outputs an alarm at the same time as theft occurs.
When the SET signal becomes "H", the buzzer BZ is set to sound. When the RESET signal of the output port P27 becomes "H", the buzzer BZ is stopped. Note that the buzzer BZ may be an in-vehicle horn.

Furthermore, the tilt and telescopic steering control device will be described in detail.

Fig. 2 is a cross-sectional assembly view of the main parts of a power type tilt and telescopic steering mechanism, which is an example of the tilt and telescopic steering control device used in this embodiment, and Fig. 3 shows the steering shaft and steering wheel shown in Fig. 2. FIG.

In the figure, an under bracket 1 is firmly attached to the body of a vehicle (not shown). One side of the upper bracket 2 is pivotally supported by the under bracket 1 and a bolt/nut 3a, and the other side of the upper bracket 2 is supported by a bracket auxiliary member 4 fixed to the upper bracket 2 and the under bracket 1. It is pivotally supported by bolts and nuts 3b. That is, the upper bracket 2 has bolts and nuts 3a and 3 that are pivotally supported with respect to the body.
It can be rotated using b as a fulcrum. Bolts and nuts 3a and 3b of the upper bracket 2
A yoke 16 is attached via bearings 15a and 15b between mutually pivotally supported positions.
A universal joint 17 is provided at the end of the yoke 16 on the under bracket 1 side,
The support shaft portion 17a of the universal joint 17 is arranged so as to be on a straight line supported by the bolts and nuts 3a and 3b. And, on the opposite side of the under bracket 1 of the yoke 16,
A serration hole 16a is cut, and is joined to the serration shaft portion 20a of the steering shaft 20 such that it can freely slide in the axial direction and engage with the serration shaft portion 20a in the circumferential direction.

Furthermore, a serration hole 17b is cut on the opposite side of the universal joint 17 from the yoke 16 so that the rotational force is transmitted to a steering gear (not shown). The bolt
One end of a link member 5 is pivotally supported by a bolt/nut 6 on the substantially opposite side of the upper bracket 2 of the bracket auxiliary member 4 which is pivotally supported by a nut 3b. The other end of the link member 5 is fixed to the slider 8 by screwing with a bolt 7 and is pivotally supported. The slider 8 is screwed into a screw 9, and as the screw 9 is rotated by a motor 14, the slider 8 moves in the axial direction of the screw 9. That is, the housing of the motor 14 is attached to the under bracket 1, and the housing of the motor 14 is attached to the under bracket 1.
A worm is cut into the rotating shaft 13 of the rotary shaft 13, and meshes with a worm wheel 12 pivotally supported by the under bracket 1. The worm wheel 1
2 is fixed or formed integrally with the screw gear 11, and the rotation of the worm wheel 12 becomes the rotation of the screw gear 11. The screw gear 11 meshes with a screw gear 10 having a coupling shaft perpendicular to its axis. The shaft of the screw gear 10 is fixed or formed integrally with the screw 9, and both ends of the shaft are pivotally supported by the under bracket 1. The slider 8 is connected to the bracket auxiliary member 4 via a link member 5, and is moved in a non-rotatable state by the rotation of the screw 9.

Therefore, when the rotating shaft 13 of the motor 14 rotates, the worm wheel 1 meshing with the rotating shaft 13
Further, the rotation of the worm wheel 12 becomes the rotation of the screw gear 10 which meshes with the screw gear 11 via the screw gear 11. The rotation of the screw gear 10 is caused by the rotation of the coaxial screw 9 that is fixed or formed integrally with the screw gear 10, and the direction of movement of the slider 8 which is screwed together with the screw 9 is the direction of the screw gear 10 and the opposite direction thereof. The slider 8 is moved via the link member 5 by bolts and nuts 3a and 3b.
Upper bracket 2, which is pivotally supported by
It is rotated using nuts 3a and 3b as fulcrums.

That is, the motor 14 acts as a tilt drive source, and its rotating shaft 13, worm wheel 12, screw gear 11, screw gear 10, slider 8, and link member 5 control the installation position and rotation speed of the motor 14, which is the tilt drive source. , torque, etc., and has the functions of a deceleration mechanism and a link mechanism, and these mechanisms constitute a tilt drive mechanism. Then, an under bracket 1, an upper bracket 2, and a bracket auxiliary member 4,
Yoke 16 attached to upper bracket 2
A tilt mechanism is constituted by the universal joint 17 and the tilt drive mechanism.

Furthermore, a yoke 16 is rotatably inserted inside the protrusion 2a of the upper bracket 2 by means of bearings 15a and 15b arranged at two locations, and the yoke 16 is rotatably inserted inside the protrusion 2a of the upper bracket 2. A movable bracket 21 is fitted on the outside of the bracket. The movable bracket 21 is attached to the steering shaft 2.
0 with a bearing 22 interposed therebetween, the steering shaft 20 is moved in the axial direction together with the movable bracket 21, and the rotation of the steering shaft 20 is freely controlled by the bearing 22. A motor 23 is attached to the upper bracket 2, and a worm is cut into a rotating shaft 24 of the motor 23. The worm of the rotating shaft 24 meshes with a worm wheel 25. The worm wheel 25 has a screw 26 fixedly attached or formed on the same axis, and the rotation of the worm wheel 25 corresponds to the rotation of the screw 26. Note that both ends of the worm wheel 25 and the screw 26 fixed or formed integrally therewith are pivotally supported by the upper bracket 2. The screw 26
is a threaded portion 21a provided on the movable bracket 21.
is screwed together, and by the rotation of the screw 26,
The movable bracket 21 moves along the protrusion 2a of the upper bracket 2 depending on the direction of rotation.

Therefore, when the motor 23 rotates, it rotates the worm wheel 25 that meshes with the rotating shaft 24, and since the worm wheel 25 is integral with the screw 26, the screw 26 rotates. The rotation of the screw 26 is caused by the threaded portion 21a of the movable bracket 21 that is threadedly engaged with the screw 26, causing the movable bracket 21 to move along the protruding portion 2a of the upper bracket 2, thereby attaching the bearing 22 to the movable bracket 21. A steering shaft 20 attached thereto moves in the axial direction of the motor 23 in accordance with the rotational direction of the motor 23. At this time, yoke 1
6 and the steering shaft 20 are connected by a serration, the steering shaft 2
0 can be freely moved in the axial direction, but the rotation of the steering shaft 20 is transmitted to the yoke 16.

That is, the motor 23 acts as a telescopic drive source, and its rotating shaft 24 and worm wheel 2
5. The screw 26 and the threaded portion 21a of the movable bracket 21 are connected to the motor 2 which is the telescopic drive source.
The transmission means B is determined by the arrangement position, rotation speed, torque, etc. of 3, and has the functions of a deceleration mechanism and a reciprocating slider mechanism that makes rotation a reciprocating motion,
These constitute a telescopic drive mechanism. A movable bracket 21 fitted onto the upper bracket 2, a steering shaft 20 attached to the movable bracket 21, and a yoke 1 coupled to the steering shaft 20 by serrations.
6 and the telescopic drive mechanism constitute a telescopic mechanism.

A steering wheel ST is fixed to the other end of the steering shaft 20 by serrations. Spoke part 27 of steering wheel ST
A switch SW1 and a switch SW2 are arranged at a.

Bolt/nut 3b constituting the tilt mechanism
A strain sensor 30 is connected nearby. A movable bracket 21 constituting the telescopic mechanism
A strain sensor 40 is connected near the bearing 22 to which the steering shaft 20 is attached. Then, the signals are taken out from each strain sensor 30 and strain sensor 40 through the lead wire 31 or the lead wire 41.

As mentioned above, the tilt and telescopic steering control device of this example uses the steering wheel ST as a fulcrum at a specific position in the direction of the steering shaft 20, rotates around that fulcrum, and stops at any rotation state. Possible under bracket 1,
The upper bracket 2 and the bracket auxiliary member 4, the yoke 16 and the universal joint 17 attached to the upper bracket 2, and
A tilt mechanism constituted by a tilt drive mechanism consisting of a motor 14, its rotating shaft 13, a worm wheel 12, a screw gear 11, a screw gear 10, a slider 8, and a link member 5; the tilt mechanism is powered by the motor 14, etc. a tilt drive source that moves the steering wheel ST in the axial direction of the steering shaft 20, and a telescopic mechanism that can move the steering wheel ST in the axial direction of the steering shaft 20 and stop it at any desired position; a drive source, a load applied above and below the steering wheel or a load applied in the axial direction of the steering shaft 20 of the steering wheel ST, or a strain sensor 30 or 40 for detecting the load; and a strain sensor 30 or 40 for detecting the load; a control means for operating the motor 14 of the tilt drive source or the motor 23 of the telescopic drive source based on the detection output of the means; and switches SW1 and SW2 for setting the control means in an active state.
It is equipped with the following.

Therefore, by controlling switches SW1 and SW2,
The steering wheel ST can be set at a predetermined position by operating the tilt drive source motor 14 or the telescopic drive source motor 23.

The motor 14 of the tilt drive source and the motor 23 of the telescopic drive source are connected to the steering wheel because the worm of the rotation shaft of the motor 14 is engaged with the worm wheel 12 and the worm of the rotation shaft 24 of the motor 23 is engaged with the worm wheel 25.
Applying an external force to the ST side, the steering wheel ST
cannot change its position.

Further, magnets (not shown) are disposed in the rotary shafts 13 and 24 in the motor 14 of the tilt drive source and the motor 23 of the telescopic drive source, and a Hall element is provided on the housing side of the motor 14 and the motor 23. is installed and converts the rotation speed of the rotating shaft into a pulse number and outputs it.

Further, the seat control device is configured as follows.

FIG. 4 shows an external perspective view of the seat used in this embodiment in a normal use state, and FIG. 5 shows an external perspective view of the seat used in this embodiment in the theft monitoring mode. Furthermore, Fig. 6 shows an overview of the posture setting mechanism installed in the seat SE and the seat reclining SEB.

In the figure, the seat consists of a seat SE and a reclining seat SEB that is rotatable relative to the seat SE. Therefore, when the seat is in normal use, it is as shown in Fig. 4, and when the seat is in the theft monitoring mode, which will be explained later, as shown in Fig. 5, the seat is brought close to or in contact with the steering wheel ST, and the distance between the two is narrowed. It is difficult to sit down.

That is, the posture setting mechanism installed in the seat SE and the seat reclining SEB is a seat forward and backward drive mechanism that slides the seat SE back and forth with respect to the base frame 114 (see FIG. 7) fixed to the floor of the vehicle. 100, seat front height adjustment mechanism 20 that drives the front part of the seat base up and down
0, Seat rear height adjustment mechanism 300, Seat reclining tilting mechanism 40 that adjusts the inclination of the seat reclining SEB to which the seat base is pivoted.
0, and a seat reclining cushion changing mechanism 500 that adjusts the spring cushion of the seat reclining SEB, and among these,
The inclination of the seat SE is set by both the seat front height adjustment mechanism 200 and the seat rear height adjustment mechanism 300. That is, the seat front height adjustment mechanism 200 and the seat rear height adjustment mechanism 300 constitute a seat base tilting mechanism.

FIG. 7 shows a mechanism at the bottom of the seat base that supports the seat SE.

In FIG. 7, lower rails 115 are each fixed to a pair of base frames 114 fixed to the floor. An upper rail 116 is attached to each of the lower rails 115 so as to be slidable thereto. Two arms 117 are fixed to each side of the upper rail 116, and a threaded rod 118 is fixedly held on the arms 117. A nut unit 110 and a nut unit 120, each of which is fixed to the base frame 114, are screwed onto the threaded rod 118. Said nut unit 1
10 and the nut unit 120 constitute a seat forward/backward movement drive mechanism 100, each of which has a threaded rod 118.
It has nuts 111 and 121 with teeth cut on the outer periphery and worm gears that are screwed into the nuts 111 and 121, respectively, and these worm gears are connected by a flexible shaft 130. There is. In the nut unit 110, a bevel gear is fixed to the shaft of the worm gear, and a bevel gear fixed to the shaft of the motor M1 meshes therewith. Since these nut units 110 and 120 are each fixed to the base frame 114, the motor M1
When the flexible shaft 130 is rotated and energized, the flexible shaft 130
rotates, the worm gear rotates, the nuts 111 and 121 that mesh with them rotate, and the threaded rod 118 is fed out from the nut units 110 and 120. Since the threaded rod 118 is fixed to the upper rail 116 via the arm 117, the upper rail 116 moves. That is, when the motor M1 is energized in the forward or reverse direction, the upper rail 116 slides relative to the lower rail 115 and moves forward or backward.

The seat front height adjustment mechanism 200 includes a nut unit 210 having the same configuration as the nut unit 120,
Motor M2, swing arm 220, swing arm 22
Rod 230, Rod 230 integrally fixed to 0
a link arm 240 that is integrally fixed to the link arm 240, and a base arm 250 that is pivotally connected to the link arm 240 and to which a seat base (not shown) of the seat SE is fixed.
It consists of When the motor M2 is driven in the forward and reverse directions, the nut unit 210 moves forward or backward along the threaded rod 118, thereby causing the rod 230 to move forward or backward.
The link arm 240 rotates clockwise and counterclockwise, and the base arm 250 moves up and down.

FIG. 8 shows an enlarged sectional view of the main part of the nut unit 210 taken along a plane including the rod 230, and FIG. 9 shows its XX sectional view.

In FIGS. 8 and 9, nut 211 is engaged with worm 212. In FIGS. Worm shaft 21
3 is freely connected to the motor shaft 214.

Since the seat rear height adjustment mechanism 300 has exactly the same configuration as the seat front height adjustment mechanism 200,
A detailed explanation thereof will be omitted. Further, the seat reclining tilting mechanism 400 is generally similar to the seat forward/backward movement drive mechanism 100.

Note that the motor M2 and the nut unit 210
FIG. 10 shows an exploded perspective view of the connecting portion.

A wheel element 216a is fixed to the end plate 216 of the motor M2, and the motor shaft 21
The rotating disk 217 fixed to the magnet 2
17a is provided. A magnet 217a is disposed at a position facing the rotary disk 217 with a gap therebetween. Similarly, a Hall element (not shown) is also fixed to the fixed tube 215. Therefore, when the motor M2 is fixed to the nut unit 210, a rectangular wave output is obtained from the Hall element in response to forward and reverse rotation of the motor M2. This rectangular wave output is used to detect the rotational direction and posture position of the motor M2. The aforementioned Hall elements and magnets are assembled into all of the aforementioned motors M1 and M2 and the motor M3 of the seat rear height adjustment mechanism 300, so that rectangular wave outputs can be obtained from each Hall element. There is.

Therefore, motor M1 and motor M2 and motor M
The amount of movement can be controlled by determining the drive state of No. 3 from its rectangular output.

In addition, in the seat forward/backward drive mechanism 100, the seat front height adjustment mechanism 200, and the seat rear height adjustment mechanism 300, the threaded rod 118 and the nut 211 are screwed together, and the nut 211 is connected to the worm 21.
2, the seat SE and the seat reclining SEB cannot be moved by any external force other than the motor M1, the motor M2, and the motor M3.

The vehicle anti-theft device of this embodiment configured as described above can be controlled as follows.

11 to 13 show the main program for controlling the vehicle anti-theft device of this embodiment.

First, processing of this main program is started at the same time as the power is turned on. At step S1, a counter N that detects the number of pulses of the reed switch LS is cleared. In step S2, it is determined whether the theft detection flag FLAGA is set (“H”).

Since the theft detection flag FLAGA is not set in the normal state, the system enters the "theft monitoring system suspension mode" in steps S3 to S19. First, in step S3, it is confirmed that the theft detection flag FLAGA is lowered (“L”), and the initial setting output in step S4 indicates the fuel supply status of the fuel cutoff control device, the stop status of the alarm sound, the seat and Tilt &
Set the telescopic steering control to its normal position. Theft alarm setting flag in step S5
FLAGA and theft alarm setting flag FLAGD are lowered, and in step S6, a signal is output to put the inside of the vehicle in the theft monitoring state. It is determined whether the lock is based on an instruction from the keyless entry transmitter KT of the keyless entry device as theft detection setting means. However, in the case of locking due to the instruction from the keyless entry transmitter KT, the courtesy switches Cr, Cl,
Determine whether Cp and Cd are all off, that is, all doors are closed. When all doors are not closed, it is not determined that the theft alarm setting conditions are satisfied. step
When all the doors are in the closed state in S17, it is determined in step S18 whether the door unlock switches Dr, Dl, Dp, and Dd are all in the locked state. Door unlock switch Dr.
When Dl, Dp, and Dd are not fully locked, it is not determined that the theft alarm setting conditions are satisfied. At step S18, the door unlock switch Dr, Dl, Dp,
When Dd is determined to be fully locked, step
At S19, the status of all seating switches Sr, Sl, Sp, and Sd is determined to determine whether there are any occupants in the vehicle. When it is determined that there is a passenger in the vehicle, it is not determined that the theft alarm setting conditions are met, and steps S5 to STEP
Start routine processing of S19. When it is determined in step S19 that there are no occupants in the vehicle based on the states of all seating switches Sr, Sl, Sp, and Sd, step S20
~Enter "theft monitoring mode" in step S26.

That is, the lock state, courtesy switch C, .
When Cl, Cp, and Cd are all off, door unlock switches Dr, Dl, Dp, and Dd are all locked, and all seating switches Sr, Sl, Sp, and Sd are in the vehicle, and there are no occupants inside the vehicle, the vehicle is stolen. Enter "monitoring mode".
This routine obtains the output of the theft detection setting means of this embodiment, and obtains a detection output indicating that all doors are locked and that there is no occupant in the vehicle using the theft detection means. , constitutes a theft monitoring condition determining means for determining a condition for starting theft detection.

In the case of locking by instructions from the keyless entry transmitter KT of the keyless entry device, it is assumed that the vehicle is locked from outside the vehicle, so it is assumed that the setting is based on theft monitoring. Entry transmitter KT
If no lock is established, the step
The judgment of the "theft monitoring setting mode" in steps S6 to S14 begins.

In step S7, it is determined whether the passenger seat Dp of the door unlock switch is in the locked state, and if it is not in the locked state, the theft alarm setting flag is set in step S10.
After confirming that FLAGP is lowered, it is determined in step S12 whether the door unlock switch Dd on the driver's seat side is in the locked state, and if it is not in the locked state, in step S15 it is determined that the theft alarm setting flag FLAGD is lowered. Confirm and return to step S6.
Keyless entry transmitter at step S6, step S7, step S10, step S12, step S15
Wait for the door to be locked by KT or for the door unlock switch Dp on the passenger side or Dd on the driver's side to become locked.

First, when the door unlock switch Dp on the passenger side is locked in step S7, step
It is determined in S8 whether the passenger seat side Cp of the courtesy switch is in the closed state, and if the passenger seat side Cp of the courtesy switch is not in the closed state, the theft alarm setting flag FLAGP is set in step S11. Then, by setting the theft alarm setting flag FLAGP in step S11,
Theft alarm setting flag FLAGP is determined in step S9.
If it is confirmed that the keyless entry transmitter KT of the keyless entry device is set, it is determined that this is one of the conditions for theft monitoring to be set. That is, if the door unlock switch Dp on the passenger side becomes locked and then the courtesy switch Cp on the passenger side becomes closed, it is determined that this is one of the conditions for theft monitoring to be set.

Similarly, on the driver's seat side, when the door unlock switch Dd on the driver's seat side is locked in step S12, it is determined in step S13 whether the driver's seat side Cd of the courtesy switch is in the closed state. When Cd is not in the closed state, the step
Set the theft alarm setting flag FLAGD on S16. Then, in step S16, set the theft alarm setting flag.
When it is confirmed in step S14 that the theft alarm setting flag FLAGD is set by setting FLAGD, after the door unlock switch Dp on the passenger side becomes locked, the passenger Similar to the case where the seat side Cp is in the closed state, this is determined to be one of the conditions for theft monitoring to be set. That is, the driver's side of the door unlock switch.
If Cd on the driver's seat side of the courtesy switch becomes closed after Dd becomes locked, it is determined that this is one of the conditions for theft monitoring to be set.

In other words, even if the door is not locked by the instruction from the keyless entry transmitter KT of the keyless entry device, the door unlock switch Dp on the passenger seat side of the theft detection setting means installed in the vehicle becomes locked, and then the door unlock switch on the passenger seat side of the courtesy switch is locked. When side Cp becomes closed, or when door unlock switch Dd on the driver's side becomes locked, and then when driver's side Cd of the courtesy switch becomes closed, the courtesy switch Cr, Cl, Cp, Cd are all off, door unlock switches Dr, Dl,
Dp, Dd are all locked, all seating switches Sr,
When there are no occupants in the vehicle from the Sl, Sp, or Sd states, the system enters "theft monitoring mode."

In this way, when the conditions of the theft detection setting means for establishing theft monitoring are satisfied, the seat control device is driven to an unusable state by the theft monitoring output in step S20. That is, microcomputer MPU
When the "H" SET signal is output from the output port P20 of No. 1, the seat SE is moved forward and the seat reclining SEB is moved forward. When the seat reclining SEB contacts the steering ST,
Seat SE forward movement or seat recline
Since the SEB driving motors M1, M2, and M3 are overloaded, the seat SE and the seat reclining SEB are driven until the driving motor for advancing the seat SE or the driving motor for the seat reclining SEB detects an overload state. At this time, the microcomputer MPU2 constituting the drive control circuit memorizes how much the motors M1, M2, and M3 for advancing the seat SE and driving the seat reclining SEB have been rotated.

At the same time, the tilt and telescopic steering control device is driven into a disabled state. That is,
Output port P2 of microcomputer MPU1
When the SET signal No. 2 becomes "H", the tilt is driven downward and the telescope is driven in the extending direction. As in the case of the seat reclining drive described above, the drive motors 14 and 23 are driven until they reach an overload state. At this time, the microcomputer MPU3 constituting the drive control circuit memorizes the rotational speeds of both drive motors 14 and 23.

In this way, in this embodiment, when the "theft monitoring mode" is entered, the seat SE is moved forward, the seat reclining SEB is moved forward, and the seat is tilted and
The tilt of the telescopic steering control device is moved downward, and the telescopic steering wheel is moved in the longitudinal direction, thereby narrowing the distance between the seat and the steering wheel, making it difficult to sit and creating an unusable condition. Therefore, the thief cannot get away with it.

In the "theft monitoring mode", the keyless entry transmitter KT of the keyless entry device is activated in step S21.
Determine whether it is unlocked by Also, step
In step S22, it is determined whether the door unlock switch Dp on the passenger side is unlocked, or in step S23 it is determined whether the door unlock switch Dd on the driver's seat side is unlocked. When unlocking using the keyless entry transmitter KT, unlocking the passenger side Dp of the door unlocking switch, or unlocking the driver's side Dd of the door unlocking switch, the theft detection setting means installed in the vehicle is activated. Assuming that the lock has been properly unlocked, the process returns to step S3 and enters the ``theft monitoring system hibernation mode'' of steps S3 to S19.

All door unlock switches are unlocked in step S24 without being unlocked by the keyless entry transmitter KT, without unlocking the door unlock switch Dp on the passenger side, or without unlocking the driver side Dd of the door unlock switch. Rear right side Dr, rear left side Dl, passenger side
When Dp and driver's side Dd are no longer in the locked state, or when all the rear right side Cr, rear left side Cl, passenger's side Cp, and driver's side Cd of all the courtesy switches are no longer in the off state in step S25, either If the door is opened or the step
When the presence of a passenger is detected in S26, the theft detection setting means is not canceled, and the vehicle enters the "theft detection mode" in steps S27 to S35, assuming that the vehicle is not legitimately boarded. When these conditions are not detected, the "theft monitoring mode" of steps S21 to S26 is continued.

When a legitimate ride is not taking place, the vehicle enters "theft detection mode" and the theft detection flag is set in step S27.
Set up FLAGA. When theft is detected in step S28, the first output outputs an alarm sound for T1 seconds. After this,
In step S29, it is determined whether unlocking is performed by the keyless entry transmitter KT of the keyless entry device. Also, whether the door unlock switch Dp on the passenger side was unlocked in step S30, or
Step S to open the door unlock switch on the driver's side
Determine if Dd is unlocked. Therefore,
A legitimate driver etc. noticed that the theft monitoring device was activated,
When unlocking using the keyless entry transmitter KT, unlocking the passenger side Dp of the door unlock switch, or unlocking the driver's side Dd of the door unlock switch, the step is considered to have been legitimately unlocked. Return to S3,
Enter the "theft monitoring system suspension mode" from step S3 to step S19. When the lock is not properly unlocked in steps S29 to S31, the pulse of the on/off signal of the reed switch LS, which detects the rotational speed of the wheel, is activated in step S32.
Start counting up the counter N. Then, when the counter N reaches the set value "n" or more in step S33, that is, when the vehicle has moved by a predetermined distance, the second output when theft is detected in step S34 is used to supply fuel from the fuel tank to the engine. Close the valve installed in the system and stop the supply of fuel to the engine. At the same time, the buzzer BZ outputs a warning sound for T2 seconds. The buzzer BZ generates the alarm sound for T2 seconds due to power consumption. Then, the counter N is cleared in step S35, and the fuel supply to the engine continues to be stopped until the lock is properly unlocked in steps S29 to S31.

However, each time the vehicle is moved a predetermined distance, the counter N becomes equal to or greater than the set value "n" in step S33, and an alarm sound is output for T2 seconds.

At this time, even if the battery BE that drives the microcomputer MPU1 is removed, the state in which the theft detection flag FLAGA was set in the backup power supply BE is remembered, so the battery is removed again.
When the BE is connected, the "theft detection mode" in steps S27 to S35 can be entered.

In this case as well, steps S21 to S23 continue until the lock is properly unlocked. Unlock by keyless entry transmitter KT, or unlock by Dp on the passenger side of the door unlock switch, or unlock on the driver's side of the door unlock switch.
When the Dd is unlocked, a step is taken because the theft detection setting means installed in the vehicle has been legitimately unlocked.
Returning to S3, it is possible to enter the "theft monitoring system suspension mode" from step S3 to step S19.

As described above, in the vehicle anti-theft device of this embodiment, the microcomputer MPU1 has a backup power supply, and even if the power is once cut off, it remembers the operation of the theft detection setting means and can be used again when the power is turned off. It is possible to operate based on the memory even when inputting. However, when carrying out the present invention, even if the power is cut off, it is sufficient to continue to remember the state in which the theft detection setting means is activated. may also be used.

Further, the theft detection setting means provided in the vehicle of this embodiment determines the locked state of the keyless entry device, the state of the door unlock switch Dp on the passenger side and the state of the courtesy switch Cp on the passenger side, or
Status of door unlock switch driver side Dd and courtesy switch driver side Cd, status of courtesy switches Cr, Cl, Cp, Cd, status of door unlock switches Dr, Dl, Dp, Dd, seating switch
Although the states of Sr, Sl, Sp, and Sd are determined, an ignition switch or other known theft detector may be used as the theft detection setting means when implementing the present invention. In any case, when the theft detectors are set, the device enters the theft monitoring mode, and when the theft detectors are not properly released and enter the operating state, it may be determined that theft has occurred.

When it is determined that theft has occurred, the timed notification means for notifying the occurrence of theft is not limited to the generation of an audible alarm such as a buzzer or klaxon, but may also include a headlight or other indicator light. It may also be a visual display means. Alternatively, the fuel may be shut off using a solenoid valve. Alternatively, an electronically controlled fuel system may be used to minimize fuel delivery.

In the above embodiment of the present invention, the operation of the tilt and telescopic steering control device allows
Although the distance between the seat and the steering wheel is narrower, when implementing the present invention, only the seats that make up the seats can be moved forward, only the reclining seats that make up the seats can be moved forward and backward, or the tilt mechanism can be moved to the extremes. The telescopic mechanism may be moved to an extreme down side or an extreme up side, a telescopic mechanism moved to an extreme long side or an extreme short side, or a combination thereof.

As described above, the automobile theft prevention device according to the embodiment of the present invention includes a theft detection means, which is provided in a vehicle and includes a seat switch or the like that detects the presence of a person in the vehicle, and a theft detection means that detects the presence of a person in the vehicle. Theft detection setting means, which includes a keyless entry device, a door unlock switch, etc. installed in the vehicle, outputs a signal indicating that the interior of the vehicle is in the theft monitoring state, and the output of the theft detection setting means is obtained, and all the doors are in the locked state. and theft monitoring condition determining means for determining a condition for starting theft detection by obtaining a detection output indicating that an occupant is missing in the vehicle using the theft detecting means, and a distance between the seat and the steering wheel. a steering restraint means consisting of steps S17 to S19 for narrowing the distance between the seat and the steering wheel to make it difficult to sit; and a restoring means in step S for restoring the distance between the seat and the steering wheel to the limited position by the release output of the theft detection setting means. and fuel stop means in step S34 for stopping the fuel supply when the vehicle is moved in a state where the cancellation output of the theft detection setting means is not output.

Therefore, since the distance between the seat and the steering wheel is restored to the set position by legitimately canceling the theft detection setting means, it is possible for a thief to narrow the distance between the seat and the steering wheel from outside the vehicle. By looking through the window to see that the vehicle is equipped with an anti-theft device, you can not only confirm that the anti-theft device is set on the vehicle and make people give up on attempting to do so, but also prevent unauthorized people from using the anti-theft device from outside. Even if you release the lock, the distance between the steering wheel and the seat is narrow, so the vehicle is not ready to drive. In the above embodiment, since the operation of the seat switch is added to the requirements of the theft detection setting means provided in the vehicle, it is possible to prevent the vehicle anti-theft device from malfunctioning under normal driving conditions.

Further, as shown in FIG. 7, when the seat is moving forward, the bolts for threading the base frame to which the seat is attached are located under the seat, making it difficult to remove them.

In the automobile theft prevention device of the above embodiment, the theft monitoring output in step S20 enters the "theft monitoring mode," and at the same time, the set output of the theft detection setting means provided in the vehicle is obtained to detect the seat and steering wheel. However, in ``Theft Monitoring Mode,'' you can enter ``Theft Monitoring Mode'' without narrowing the distance between the seat and the steering wheel to make it difficult to sit. When the theft detection output is obtained, the second theft detection output in step S34 closes the valve installed in the fuel supply system leading from the fuel tank to the engine, stops the fuel supply to the engine, and at the same time turns on the buzzer. Outputs an alarm sound for T2 seconds in BZ.

That is, when the vehicle is moved without the release output of the theft detection setting means being output, the fuel supply is stopped, so even if the thief tries to force the vehicle to run, the fuel supply will be stopped. , you will not be able to drive. Therefore, it becomes difficult to move the vehicle.

Furthermore, at this time, the seat SE is moved forward, the seat reclining SEB is moved forward, and the tilt &
The tilt of the telescopic steering control device was moved downward, and the telescopic steering wheel was moved in the longitudinal direction, narrowing the distance between the seat and the steering wheel, making it difficult to sit, creating an unusable condition, and preventing a thief from getting on and escaping. Good too.

In this way, the distance between the seat and the steering wheel can be narrowed using the theft detection output to make it difficult to sit. In this case, the number of drive circuits between the seat and the steering wheel can be minimized. Furthermore, when getting into the vehicle by legitimately canceling the theft detection setting means, there is no need to wait for the seat and steering wheel to return to normal positions, so the user can get into the vehicle at the same time as the theft detection setting means is legitimately canceled.

[Effects of the Invention] As described above, the vehicle theft prevention device of the present invention has a theft detection setting that outputs a signal to put the inside of the vehicle into a theft monitoring state using the theft detection means that detects the presence of a person inside the vehicle. and an output from the theft detection setting means, and when all doors are locked, the theft detection means is used to obtain a detection output indicating that there is no occupant in the vehicle, and theft detection is started. The theft monitoring condition determining means for determining conditions confirms that there is no one in the vehicle and enters the theft monitoring state, making it possible to increase the reliability of the theft monitoring.

In addition, when the theft monitoring state is entered, the steering restraint means uses the output of the theft monitoring condition determination means to control the seatback tilting function, the steering tilting function, and so on.
The telescopic function narrows the gap between the seat and the steering wheel, making it difficult to sit down, making it easy to determine whether the vehicle is set to theft monitoring mode after the driver exits the vehicle. , and has the visual effect of notifying a third party that the device is in the theft monitoring state and preventing theft or mischief from occurring.

Even if a person breaks into the vehicle by breaking the glass window, the space between the seat and the steering wheel becomes narrower, making it difficult to sit down, and the theft detection setting means does not output a release output. This stops the fuel supply when the vehicle is moved. Therefore, when the driver, etc. gets out of the vehicle, the distance between the seat and the steering wheel is narrowed to make it difficult for the driver to sit down, and this is not canceled unless the vehicle's anti-theft detection setting means is properly canceled. Therefore, it is possible to prevent normal driving even if a third party rides the vehicle illegally. Moreover, since the fuel supply is stopped when the vehicle is moved while the release output of the theft detection setting means is not output, it is possible to prevent the vehicle from running on its own. Therefore, even if the thief tries to force the vehicle to run, the fuel supply will be cut off, making it difficult to move the vehicle.

Furthermore, when the owner of the vehicle sets or cancels the theft detection means, he/she obtains the set output of the theft detection setting means provided in the vehicle and the detection output that the occupant is missing from the vehicle. Since the distance between the seat and the steering wheel is determined by the movement of the person, there is no problem with the driver getting in and out of the vehicle. In other words, since the detection output of the absence of a passenger from the vehicle is added to the requirements of the theft detection setting means provided in the vehicle, it is possible to prevent the vehicle anti-theft device from malfunctioning under normal driving conditions. .

[Brief explanation of drawings]

FIG. 1 is an explanatory diagram showing the basic circuit of a vehicle theft prevention device according to an embodiment of the present invention, and FIG. 2 is an explanatory diagram showing a power type tilt and telescopic steering control device as an example of a tilt and telescopic steering control device used in this embodiment. A cross-sectional assembly diagram of the main parts of the steering mechanism, Figure 3 is the 2nd
FIG. 4 is an assembled perspective view showing the relationship between the steering shaft and the steering wheel; FIG. 4 is an external perspective view of the seat used in this embodiment in a normal use state;
The figure is an external perspective view of the seat used in this embodiment in the theft monitoring mode, Figure 6 is an explanatory diagram showing an overview of the posture setting mechanism installed in the seat, and Figure 7 is the lower part of the seat base that supports the seat. Fig. 8 is an enlarged cross-sectional view of the main part taken along the plane including the nut unit and rod in Fig. 7, Fig. 9 is a sectional view taken along line XX in Fig. 8, and Fig. 10 is a cross-sectional view of the motor. 11 to 13 are flowcharts of the main program for controlling the vehicle anti-theft device of this embodiment. In the figure, MPU1, MPU2, MPU3: microcomputer, IG: ignition switch, Dr, Dl, Dp, Dd: door unlock switch, Cr, Cl, Cp, Cd: courtesy switch, Sr,
Sl, Sp, Sd: Seating switch, SE: Seat,
SEB: Seat reclining, ST: Steering wheel. Note that in the drawings, the same reference numerals and symbols indicate the same or equivalent parts.

Claims (1)

[Scope of Claims] 1. Theft detection means provided in a vehicle to detect the presence of a person in the vehicle; and theft detection setting means for outputting a signal to set the inside of the vehicle to a theft monitoring state by the theft detection means. , obtains the output of the theft detection setting means, obtains a detection output indicating that all doors are in a locked state, and that there is no occupant in the vehicle using the theft detection means, and starts theft detection. a theft monitoring condition determining means for determining the condition; and an output from the theft monitoring condition determining means to narrow the distance between the seat and the steering wheel by a tilting function of the seat back, a tilting function of the steering wheel, and a telescopic function. a steering restraint means for making it difficult to sit; a restoring means for restoring the distance between the seat and the steering wheel to the set position by a release output from the theft detection setting means; and a state in which the release output from the theft detection setting means is not output. 1. A theft prevention device for a vehicle, comprising: fuel stop means for stopping fuel supply when the vehicle is moved.