JPS6223847A - Car lock control device - Google Patents

Abstract

PURPOSE:To make it impossible to release a car lock even on the use of any third person's duplicated code generator by changing automatically an unlocking code upon his trial to unlock the car. CONSTITUTION:A microcomputer 32 is connected with a card reader CAR, and A/D converter 30, a key code receiver KCR, an interface 33, a dip switch DSW-2 for signal setting, and the like. The interface 33 is connected with another microcomputer 32 related to doors D1-D4, each at front and rear seats, and the like. The card reader CAR reads magnetically recorded informa tion (code), when a card for inputting a code is inserted therein. When the code is judged to agree to a stored code by the microcomputer 32, predetermined control processes are made by said computer 32. Concurrently, said computer 32 sends the revised information of code data to the card for the correction of a code to be transmitted next.

Description

[Detailed Description of the Invention] [Object of the Invention] (Industrial Application Field) The present invention relates to a lock control device for preventing a third party from intruding into a vehicle or using the vehicle, and is particularly intended to be limited thereto. However, it relates to a lock control device for a vehicle door and engine operating circuit.

(Prior Art) The most typical conventional lock devices are a key cylinder containing an engine key switch and a door lock mechanism.

However, there are problems such as the window glass being broken and the lock knob inside the car being operated, the locking mechanism being unlocked and the door being opened, or the engine being started due to a short circuit in the electrical lead outside the key cylinder. there were. So recently,
Encryption door locks have been proposed that transmit an unlock code and a lock code from a transmitter, receive them in the vehicle, and unlock the door lock mechanism only when the unlock code is received (for example, Kaisho 57-7737
(Japanese Patent Application Laid-Open No. 59-24075).

(Problems to be Solved by the Invention) In this type of vehicle lock control, when the driver (car owner) transmits radio waves from outside the vehicle to unlock the door,
A third party receives the unlock code nearby, analyzes the unlock code, and creates a transmitter that sends out the same -3= unlock code, in other words, creates a transmitter equivalent to a combination key. There is a risk of using it to break into the car or steal the car when the owner is not present.

Furthermore, since locking and unlocking operations using only a transmitter have low operability inside the car, it is necessary to leave a conventional lock knob on the inside of each door, or to install a lock knob for locking and unlocking instructions. A switch (either a lock switch or an unlock switch, the only difference in name is the name because when one switch is used, it instructs locking and unlocking) is similarly provided. Therefore, if the window is broken and the lock knob or lock switch (unlock switch) is operated, the same problem as before occurs.

The first purpose of the present invention is to prevent the theft of an unlock code in the unlock code input method, and the second purpose is to prevent other people from intruding into the vehicle and more reliably prevent the vehicle from being stolen by another person. The purpose of

14= [Structure of the invention] (Means for solving problems) In order to achieve the above object, the present invention.

A locking/unlocking setting device that sets the locking/unlocking of the on-vehicle electric locking device; a code generating device; and the code generated by the code generating device is compared with the held unlock code, and if it matches the unlock code, an unlocking instruction is issued. In the on-vehicle lock control device, the on-vehicle lock control device is provided with: a lock control device that provides a lock control device with a code that changes the code to be generated by the code generator when the unlock code matches the lock control device; A change information generation means for generating information for changing the code is provided.

(Operation) By taking such measures, according to the present invention,
When the vehicle is unlocked using the code generator, the unlock code is automatically changed. Therefore, even if a third party receives the unlock code, copies the transmitter, and uses it, the vehicle will not be unlocked because the unlock code is different for the vehicle.

In order to improve the operability of locking and unlocking inside the car, in a preferred embodiment of the present invention, in the car-1-locked state using a code generator, unlocking is not possible by operating the lock knob or lock switch inside the car, and the code is not activated. When a car using a generator is not locked, it is unlocked by operating the lock knob or lock switch. If there is a passenger in the car when the car is locked using a code generator, if the lock knob or lock switch does not work, the passenger will be forced into the car. When the vehicle is in a state indicating manned parking (for example, the switch is closed), it is possible to unlock the vehicle according to the lock knob or lock switch. When the driver leaves the passenger in the car and locks the door using the code input means, the driver closes the condition designation switch before exiting the vehicle.

When the driver exits the vehicle by setting the condition specifying switch to a specific state (for example, closed) and locks the door using the code input means, the door can be unlocked by operating the vehicle inside the vehicle. If the driver gets out of the vehicle with the condition designation switch in another state (for example, open) and locks the door using the code input means, the door cannot be locked by operating inside the vehicle. Therefore, even if someone breaks the window and operates the lock knob or lock switch inside the car, the door will not open.

If a person enters the car by breaking the window glass or inserting a tool into the door lock mechanism through the gap in the door and operating the lock rod connected to the lock lever to open the door, a person can enter the car and lose the key. A vehicle may be stolen by starting the engine with a tool or a short circuit in the electric lead in the engine key cylinder.

Therefore, in a preferred embodiment of the present invention, a switching means for ignition lock is incorporated into the engine ignition circuit (hereinafter referred to as ignition circuit), and the ignition circuit is configured to be unlocked only when a code is input, similar to the door lock, and further, The door lock mechanism is equipped with a latch release seat 71 actuator powered by an electric motor. According to this, even if someone were to enter the city and short-circuit the electric lead of the ignition switch, the engine would not start. Crime prevention becomes extremely effective.

Other objects and features of the present invention will become apparent from the following description of embodiments with reference to the drawings.

(Embodiment) FIG. 1 shows components on a vehicle according to an embodiment of the present invention.

An ignition port 14 IGC is connected to a battery 1, which is the main power source of the vehicle, via an engine start switch 2 attached to an ignition switch. Ignition port MIGC
Usually, the ignition coil 3. Pickup coil 7, coil 7 for obtaining a signal synchronized with the movement of the engine piston
It is equipped with an amplifier 6 that amplifies and waveforms the generated voltage, and a switching transistor 5 that energizes the primary coil of the ignition coil 3 in synchronization with the generated voltage.
A relay 4 is installed on the primary coil side of this ignition circuit IOC by inserting a relay contact piece. When the relay 4 is non-energized, its contact piece is open, so the ignition coil 3 is not energized, so the engine does not start (ignition lock).

A constant voltage circuit 11 is connected to the battery 1 via a relay 10 for applying voltage to electrical elements such as a motor and a buzzer that consume relatively large amounts of power.

Further, a constant voltage circuit 12 is always connected to the battery l. This constant voltage circuit 12 always applies a constant voltage to an electrical element such as a microprocessor that requires constant energization and has low power consumption (even when the engine start switch 2 is open). A relay driver 8 that closes the relay 4 receives the output of the constant voltage circuit 11 , and a relay driver 9 that closes the relay 10 receives the output of the constant voltage circuit 12 . Control input terminals of the two drivers 8 and 9 are connected to an output port of a microprocessor (hereinafter abbreviated as microcomputer) 32.

The microcomputer 32 has a card reader CAR.

A/D converter 30. Key code receiver KCR.

Interface (transmission/reception signal amplification/shaping circuit) 33
, DIP switch DSW-2 for encryption setting, and
In addition, two equipment circuits (not shown because they are not related to the present invention) are connected. The interface 33 includes a driver seat door DI, a passenger seat door D2. Microcomputers (34, etc.) installed in each of the driver's seat rear door n3, the passenger seat rear door D4, and the luggage storage door (luggage door) LD at the rear of the vehicle are connected. That is, a microcomputer is installed in each door, and these are connected to a host microcomputer 32 via an interface 33.

When a permanent magnet gear 26 connected to a vehicle speed meter cable (not shown) rotates, a reed switch 27 opens and closes, and an amplifier 28 opens and closes to generate an electric pulse at a predetermined level. This electric pulse is the F/V converter 29
is converted into an analog voltage with a level proportional to the pulse frequency. The analog voltage is converted into digital data by an A/D converter 30 and provided to a microcomputer 32. This digital data indicates vehicle speed V.

The key code receiver KCR is connected to the antenna A T 2 and demodulates code data from the received signal and provides it to the microcomputer 32 . When receiving code data, if an electrical signal of a predetermined frequency is not received, the demodulator RR2
The output of is I- (However, when an electric signal of a predetermined frequency is received and code data is demodulated from it, the output of at least one point demodulator RR2 becomes 1.The first 4)
At this time, an interrupt occurs to the microcomputer 32, and the microcomputer 32 reads the code data. As will be described later, when the vehicle is parked and the doors are locked, a code code is transmitted from the outside to release the door lock memory (unlock memory). Therefore, the key code receiver KCR and the microcomputer 32 must always be on standby even when the engine start switch 2 is open. Therefore, a constant voltage is applied to the demodulator RR, 2 of the key code transmitter KCR and the microcomputer 32 (as well as the door microcomputer 34, etc., which will be described later) from the constant voltage circuit 12 which always has an output.

Further, the microcomputer 32 normally connects the key code receiver to 11-CR and its demodulator RR2 to the antennas A and T2, and gives an instruction signal to the microcomputer 32 to obtain the output of the demodulator RR2.

The key code receiver KCR is further equipped with a modulator TR,2, to which the output voltage of the constant voltage circuit 11 is applied. When giving unlock code change information to the card CAD, which will be described later, the microcomputer 32 gives an instruction signal to the key code receiver KCH to connect the output end of the modulator TR,2 to the antenna AT2 and to separate the demodulator RR2. Then, the modified data is transmitted to the modulator TR2.

Figure 2 shows an overview of the card reader CAR. The card reader CAR is installed inside the instrument panel in front of the driver's seat, and a card insertion slot 19 is open toward the driver's seat. A CAD card (details will be described later) for entering the code is inserted here. slot 1
A card detection switch 13 is arranged inside the card detection switch 13, and card feeding rollers 20, 2+, a magnetic reading head 16. A motor Mc that drives the rollers 20 and 21 via a speed reducer and a switch 14 for detecting a cart are provided. Switches 13 and 14 are controlled by the microcomputer 32
The motor driver 15 (Fig. 1) that energizes the motor Mc is also connected to the microcomputer 32.
The magnetic read head 16 is connected to an amplifier 17. Amplifier 17 provides a signal indicative of the signal level read by head 16 to comparator 18. The signal is detected by the comparator 18 [or]
-() and is given to the microcomputer 32. When the card CAD is inserted into the slot 19 and detected by the switch 13, the motor Mc is energized to rotate normally and the roller 20
Rotate ゜21 clockwise. This allows the card CAD
is drawn into the interior, and at this time the magnetically recorded information on the card CAD is read. The tip of the card CAD is switch 14
When detected, the motor Mc is stopped and the card CAD remains inside the throwers 1-19. As will be described later, when the engine start switch 2 returns to open (engine stop), the motor Mc is reversely energized, and when the card CA D is inserted into the slot 19 and detected by the switch I3, The motor Mc is energized to rotate normally and rotates the rollers 20° 21 clockwise.This pulls the card CAD into the interior, and at this time the magnetically recorded information on the card CAD is read. When detected, the motor Mc is stopped, and the card CAT') remains inside the slot j9.As will be described later, when the engine start switch 2 returns to open (engine stop), the motor Mc is stopped.
c is reversely energized, the card CAD is driven toward the outside of the slot 19, and when the switch 13 no longer detects the cart CA I), the motor Mc is stopped.

The front side of the card CAr) is shown in FIG. 3a, the back side is shown in FIG. 3b, and the internal electric circuit is shown in FIG. 3c.

A magnetic film 24 is formed on the surface of the card 24, and the surface is covered with a protective film. Slightly recessed from the surface is the all door unlock transmission instruction switch 221. Driver seat door unlock transmission instruction switch 222. The operation surface of the luggage door unlock transmission instruction switch 223 and the all door lock transmission instruction switch 231. Fully closed transmission instruction switch 232 for all doors. The operation surface of the luggage door lock transmission instruction switch 233 is exposed.

On the back side of the cart CAD is an antenna AT+ composed of printed electrodes, which is covered with a protective film.

When the card CAD is drawn into the slot 19 by the roller 2o, the magnetic film 24 moves under the reading head 16, and the magnetically recorded information on the magnetic film 24 is read by the head 16.

Inside the card CAD, there is a dip switch DSW-1 for setting the encryption code (base point code). When the unlock transmission instruction switches 221 to 223 or the lock transmission instruction switches 231 to 233 are closed,
~223 + Opening and closing of 231~233 and switch D
A coded data word consisting of coded code data sequentially changed using the change information described later based on the open/closed combination (base point code) of SW-] is 15 consecutive words with several bits of L added to the beginning. The signal is applied multiple times to the modulator TRI by the microprocessor (hereinafter referred to as microcomputer) TM, modulated, and transmitted from the antenna AT'l.

Therefore, when the key code receiver KCR receives this transmission, an interrupt is generated to the microcomputer 32 in the section (■) of the transmitted data, and the microcomputer 32 reads a predetermined number of bits of data sandwiched between the sections (■). . The last 6 bits of the read data are lock/unlock instruction data determined by the opening/closing of the switches 221-223 and 231-233, and the plurality of bits before these are the encryption code.

Note that tip switches DSW-1 and DSW-2 (first
(Figure) are the same, and when the car is delivered to the user, the open/closed chambers of DSW-1 and the open/closed chambers of DSW-2 are the same.

The details will be described later, but when the received encryption code matches the held encryption code, the microcomputer 32 transmits encryption data change information to the card CAD, and the 6-bit work designation data (221 to 22a) following the received encryption code. +2
3+ to 23a (opening/closing state data) is executed. The card CAD receives the change information and modifies the previously sent code based on the change information to create the code to be sent next time.

Next, the elements installed on the driver's door DI are number 1a.
This will be explained with reference to FIG. 1 and FIG. 1b.

There is a lock knob switch 36 on the door Dl that can be operated inside the car.
．． Inside handle switch 361. Outside sundor switch 36o, nut rod position detection switch MS inside the door, door ajar detection switch 37. Door fully closed detection switch 38. Rotsu・Ri/Unlock Motor Ml
, motor driver 35 degree buzzer 40 and buzzer driver 39. It is also equipped with a microcomputer 34. The microcomputer 34 receives a constant voltage from the standby constant voltage circuit 12 and is always powered on (even when the switch 2 is open), but the other components are only turned on when the engine key switch 2 is closed (normally when the engine is running). A constant voltage is received from a constant voltage circuit 12.

The other doors D2 to D4 are also equipped with exactly the same electrical elements.

FIG. 4 shows a door lock device for the driver's seat door D1.

A cutout portion of a substantially disk-shaped latch member 42 engages with the slides 1 to 41 that are fixed to the vehicle body, thereby maintaining the door in a closed state. Circular groove 4 formed in base 48
A pin 42P integrated with the latch member 42 has entered the 8S, and this pin 42P is pushed by a spring 488P. Therefore, the latch member 42 has a spring 48
5P constantly applies counterclockwise rotational force.

The pole 43 that engages with the notch of the latch member 42 is connected to the shaft 44.
The pole 43 is pivotally connected to the pole 43 with a spring (not shown).
is biased clockwise around the shaft 44. As shown in the figure, the notch of the latch member 42 engages with the striker 41,
When the pawl 43 is engaged with the notch (latched position), the latch member 42 can rotate and the door will not open. The pawl 43 is connected to a lock lever 45. When the lock lever 45 is rotated counterclockwise to disengage the pawl 43 from the notch (unlatch position),
can open the door. In order to enable such counterclockwise rotation (unlock drive) of the lock lever 45, a bent protrusion 45a is formed on the lock lever 45, and a nut rod 46 is placed against this protrusion 45a. has been done. The nut rod 46 has a female threaded hole in the center, and the outer surface is cylindrical at the tip, but prismatic at the middle and rear ends, and the prismatic portion can move forward and backward through the square opening of the lock actuator case. Supported. A screw holder 47 is screwed into a nut holder 46 inside the case. There is a flange at the end of the threaded rod, which abuts against a protrusion raised from the base plate of the door lock device. This restricts movement of the threaded rod 47 to the right. Screw offering 4
A rotating shaft of a motor Ml is connected to 7. The illustrated state is a state in which the motor M1 is rotated in the normal direction and the pear l-rod 46 is moved to the lock position. The nut position detection switch MS is arranged so that the switch is open in this state.

The illustrated state is the door closed state.

When motor M1 is energized in the illustrated state (door closed),
When the screw stud 47 rotates and the nut rod 46 moves to the left (release operation) switch MS is closed, the nut rod 46 pushes the protrusion 45a. This pushing movement causes the lock lever 45 to
will now be rotated counterclockwise. This is the door open state. In this state, the latch member 42 rotates,
The striker 41 is released from the notch in the latch. The other doors D2 to D4 are also equipped with locking devices having the same structure. Note that the motor M1 is automatically urged to rotate normally and returns to the door closed position.

Nut position detection switch MS is closed (unlocked)
Now, the lock knob switch 36 that is opened and closed by the lock knob.
(unlock when closed, lock when open) is closed (unlocked), and when the inside handle switch 36i or the outside handle switch 360 is closed (instructed to unlock) by operating the inside handle or outside handle, the motor Ml rotates forward, the nut rod 46 pushes the bending protrusion 45a, and rotates the pole 43 counterclockwise.
The pawl 43 and the latch member 42 are disengaged, allowing the door to be opened (latch release). When the naso 1-rod position detection switch MS is open (locked), the motor M1 will not start even if the inside handle and the outside handle are operated under specific conditions of the vehicle, so the motor M1 will not be unlocked (latch released).

Referring again to FIG. 1a. 31 is a manned parking switch (condition specification switch), and it is set to close this switch (manned parking) when leaving someone in the car, and leave it open (empty parking: unmanned parking) when everyone exits the car. ing. The state of this 1 inch space (closed: manned parking, open: empty parking) is read by the microcomputer 32. The microcomputer 32 also reads whether the engine start switch 2 is open or closed.

Next, referring to the flowchart, microcontrollers 32 and 3
The control operation of the fourth grade will be explained.

To facilitate understanding, first, driver operations and vehicle equipment operations in response will be explained.

Note that the vehicle equipment operations described later are performed by the microcomputers 32 and 34.
etc.

(1) Empty parking (unmanned parking) state Close the manned parking switch 31: Manned parking, state A where all doors are locked by pressing the switch 231 of the cart CAD outside the vehicle, and open the manned parking switch 31: Unmanned parking,
State B is when all doors are locked by pressing the switch 231 on the card CAD outside the car, and inside the car, after setting the lock knob switch 36 on all the doors to "lock", get out of the car, close the door while operating the outside handle, and the cart CAD is There are three people in state C1 who did not use it. In either case, all doors are locked and the nut rod 46 is in the position shown in FIG.

In state A, unlock the lock knob switch 36 (
When the inside handle switch 36i or the outside handle switch 36° is unlocked (closed), the door opens. However, the Lage Soji Door LD does not have a lock knob switch.

Note that the luggage door is unlocked only when an unlock instruction is received from the host microcomputer 32. At this time, the outside handle is operated to close the switch and the lock is released.

For all doors, when in state B, lock knob switch 3
6 is unlocked (closed) and the inside handle switch 36i or the outside handle 36o is closed (unlocked), the door is unlocked and the door does not open.

In state C, the lock knob switch 36 is unlocked and the inside handle switch 36i or the outside handle 36. When closed, the door is unlocked and doors D1 to D4 are opened.

(2) When the switch 221 of the unlock card CAD from the outside is pressed, doors D1 to D
4 is unlocked. When the switch 222 is pressed, only the driver's seat door Di is unlocked. Open the door and get in. Press the switch 223 to open the luggage door LI).

(3) Engine starting car+: Insert CA D into slot 19. In response to this, the card CAD is pulled into the slot 19, and when the information on the magnetic film 24 matches the setting code of the DSW-2, the relay 4 is closed. When the engine start switch 2 is operated to the engine start position (closed), the starter motor is started and the engine starts. The card CAD is pulled into the slot 19 and remains there. DSW-2
If the head 16 does not read a code that matches the configuration code of the will not start.

(4) If the door is opened or left ajar at a vehicle starting speed v1 or higher, the door buzzer will sound continuously.

Doors are automatically locked at higher vehicle speeds of 72 or higher (4th
state).

(5) Engine Stop When the engine is stopped by opening the engine start switch 2, the cart CAD comes out of the slot 19 and the buzzer on the driver's door D1 sounds intermittently. When the card CAD is removed from the slot 19, the buzzer stops ringing.

(6) Close the manned parking switch: Get out of the car as manned parking, and press the switch 231 of cards CA and D outside the car (Δ).

In this case, the lock is released by operating (closing) the lock knob switch 36 of the interior door D1 to r')4 and closing the inside handle switch 36i or the outside handle switch 36o.

Open the manned parking switch: Get out of the car as unmanned and press the switch 231 on the card CAD outside the car (B). In this case, unless the card CAD switch 221 or 222 is operated from outside the vehicle, the door will not be unlocked and the door will not open even if the lock knob switch 36, inside handle switch 36i, or outside handle switch 360 is operated.

Alternatively, set all door lock switches to "lock" and exit the vehicle (C). In this case, operate (close) the lock knob switches 36 of the doors D1 to D4 inside the vehicle, and use the inside handle switch 36i or the outside handle switch 36i.
When o is closed, the door is unlocked and the doors D1 to D4 are opened.

The state after completing (6) is the above-mentioned (1).

Next, the operation of the host microcomputer 32 will be described first with reference to flowchart i. -) Since the second microcomputer 32 always receives voltage from the constant voltage circuit 12 that always generates a constant voltage, it is normally in an interrupt enabled state after initialization. First, the interrupt control operation of the microcomputer 32 will be explained with reference to FIG. 5a.

When the key code receiver KCR is not receiving radio waves from the card CAr), it gives the output (1) to the interrupt port 1-TNT of the microcomputer 32, and does not enter interrupt control in this state. When the code code is transmitted from the card CAD, the key code receiver KCR adds 9. When the multi-pips 1-minute (2) is received, the process proceeds to interrupt control. In this interrupt control, the microcomputer 32 first proceeds to code decoding (step 1: hereinafter, the word "step" will be omitted in parentheses).

Details of this coat decoding (1) are shown in FIG. 5b.

When the code is decoded, the microcomputer 32 generates data for a predetermined number of bits next to L for multiple bits of the received data (encryption word: more precisely, encrypted data + switches 221 to 22a).
23+ to 233 open and close data) is read (14+).

Here, the microcomputer 32 refers to the contents of the encryption register that stores the encryption code for comparison (+42).
. If the content is O, this is the first reception of encrypted data after the power is turned on (connecting the circuit 12 to the battery 1), so the base coat (dip switch r) SW
-1 open and close data) in the encryption register]
43) Proceed to step 144. Furthermore, as will be described later, the card CAr'') uses the dip switch DSW- for the first code word transmission after the power is turned on (battery sent).
] Transmits encrypted data consisting of the base point code, which is the open and closed state data.

If the microcomputer 32 determines in step 142 that the contents of the encryption register are not 0, it means that the encryption data has already been received once, so the process directly proceeds to step 144.

Now, proceeding to step 144, the microcomputer 32 compares the encrypted data of the received data with the contents of the encrypted register. If the two match, the contents of the reception count register j are updated to the value at that time plus 1 (+45),
The contents of the encryption register are updated to the value obtained by adding the contents of the number of times register i to the current value (146). and card C
The contents of the number of times register l are transmitted to the AD (147: Transmission of change information). As a result, the encrypted data held on the microcomputer 32 side becomes different from the one held immediately before. As will be described later, the card CAD receives the change information (the contents of the number of times register i) and uses the change information added to the encrypted data held at that time as the next transmitted encrypted data.

After transmitting the contents of the number of times register i, the microcomputer 32 proceeds to step 3 in FIG. 5a.

In step 144, as a result of comparing the received encrypted data with the contents of the encrypted register, if the two do not match, the microcomputer 32
49) Clear the number register j that holds the number of reception errors and send a code retransmission request to the card CAr) (150). (153), and in step 141 data from the card CAD is received again. If the next received data matches the contents of the encryption register, the process proceeds to step 145 described above. If they do not match again, the process proceeds to step 148, and since the error flag is set this time, the content of the number of times register j is referred to, and j
Check whether the value is 2 (received three times but all were errors), and if it is not 2, increment the contents of register j by 1 and send a code resend request to cards CA and D. send. When the content of register j becomes 2, it refers to the presence or absence of the base point code flag (154), and if it does not exist, sends a base point code transmission request to the card CAD and sets the base point code flag (156). When the card CAD transmits data (base code = DSW-1 open/close data) in response to this base point code transmission request, the process proceeds from step 154 to 157 and the encrypted part of the received data is sent to the base point code of the microcomputer 32. = Compare with the open and close data of DSW-2 (157). If the two match, the error flag and base point code flag are cleared (158), the base code is stored in the register (159), and the process proceeds to step 145. If the two do not match in step 157,
Clear the error flag and base code flag (1
60) Returning to the main routine (FIGS. 5d and 5e), the flag for starting door lock/unlock control is not set.

Now, in step 147, when the change information (contents of the number of times register i) is sent to the car +: CA n, the microcomputer 32
Proceed to step 3 of FIG. 5a and switch 22. ~2
If data indicating that any of the switches 231 to 233 are closed is after the encrypted data, the unlock flag is set. 4) When there is data indicating that any of the switches 231 to 233 are closed, the lock flag is set. (6) Return to the main routine (Figures 5d and 5e). If these flags are present in the main routine, the next 6 bits of the encrypted data (221~223, 23°~23
The designated lock/unlock control is performed by referring to the open/close data (No. 3). This will be explained later.

By the interrupt control operation explained above, the constant voltage circuit 12 is connected to the battery 1 on the car, and the car 1 is connected to the CAD.
When the battery is set and one of the switches 221 to 223. The data is sent to the microcomputer 32, and the microcomputer 32 checks this against the base point code, which is the open/close data of the dip switch DSW-1, and if they match, the process proceeds to step 145. Then, the microcomputer 32 updates the contents of the encryption register to the base point code plus the contents of the number register 1, and transmits the change information (the contents of the number register i) to the card CAD.

The details will be described later, but the card CAI receives and holds the change information, and the next time it sends the encrypted data, it sends the previously sent encrypted data plus the held change information as encrypted data.

Next, the control operation of the microcomputer TM of the card CAD is controlled by the fifth
This will be explained with reference to figure c. Power is turned on (16):
(The battery is set in the card CAD), and the microcomputer TM initializes (162). In this initialization, the microcomputer TM clears the internal register and switches 25t.
Then, switch 25p is turned on and switch 25r is turned off.

Then, the states of the input ports connected to the switches 221 to 223 and 231 to 233 are read. While any of these switches are open, we are waiting for one of them to close (163, 173).

Switches 221-22. ．． When one of 231 to 233 is closed, the microcomputer MT refers to the contents of its own cryptographic register (internal register). If its content is 0,
After the power is turned on (battery set), the first call is instructed, so enter the base point code (DSW-1) in the encryption register.
(open/close data) is stored in memory (165). If the contents of the cipher register are not 0 (164), or if the base 32 one-point code is stored in the cipher register as described above (1, 65),
The contents of the encryption register include the number of times register i (microcomputer 32
Update the encryption register with the sum of the contents of the register that stores the changed information received from the memory (the register that stores the changed information received last time). Opening of switches 221 to 228, 231 to 233 to register contents,
Store the codeword with closed data added (166)
.

Then, the contents of the transmission register are transmitted (167).

In this transmission, first, the switches 15p and 25t are turned on, a plurality of bits of 4 are added to the end of the encrypted word, and the encrypted word is transmitted, and this is repeated several times. Next, the microcomputer TM turns off switch 25t and switches 25t to OFF.
Turn on 5r and wait for reception from the microcomputer 32. Switches 221-22a.

This reception waiting continues while any one of 231 to 23a is on (173-168-169-170-173
).

When a code retransmission request is received while waiting for reception (168
), go back to step 167, add multiple bits of L to the end of the encryption word, and send the encryption word +67
), also waiting for reception (+73-168-16ri-170-
Return to 173). When a transmission request is received to base point code 1 (
169), update memory of the base point code in the encryption register,
221 to 223 to the contents of the encryption register in the transmission register,
23. The encrypted password with .about.233 added thereto is updated in memory (172) and transmitted in step 167. When the change information (number of times data i) is received (170), the microcomputer TM updates and stores the change information in the number of times register i, which is its internal register (1.7). Then, when all of the switches 221 to 223, 23+ to 238 are returned to open (173, 163), the switch 25p is turned off (+73).

Interrupt control of the microcomputer 32 (card CAD) explained above
operation (receiving from and sending to card CAD) (5a)
and FIG. 5b), and the transmission and reception control operations of the microcomputer TM to the microcomputer 32 (FIG. 5c), the card CAD switches 221 to 22a + 231-23
．． If you operate 3, as long as the cipher transmission and reception match, the cipher data will be changed for each transmission, and the base code will not be sent from the card, and the cipher that was sent last time will be changed. The vehicle door will not be unlocked with the encrypted data after the data is stolen. Card C
When the transmitted data (encryption from outside the vehicle) with change information added from the AD does not match the encrypted data held in the microcomputer 32, the microcomputer 32 requests the card CA D to transmit the base point code, but the microcomputer 32 Since the base code itself is not transmitted, even if a signal is transmitted by a fake transmitter that transmits stolen encrypted data, the base code will not be stolen. Authenticity When card CAD transmits base point data, there is a risk of it being stolen, but as mentioned above, base point data is only transmitted in extremely limited places or situations, so the probability of base point data being stolen is extremely low. low.

Next, referring to FIG. 5d and FIG. 5e, the microcomputer 3
The second main control operation (main routine) will be explained. To explain this, when the battery 1 is connected to the constant voltage circuit 12 in a production factory, etc., voltage is applied to the microcomputer 32 (7), and the microcomputer 32 internal registers and input/output board are initialized (8). ). The initialized state is a standby state, in which relay 4 is off, relay 10 is off, motor Mc is off, and interrupts are possible. In addition, at the end of initialization, microcontroller 3
2 transmits the initial state set to the microcomputers 34 and the like of the doors D1 to D4 and LD, and the microcomputers 34 and the like set the unlocked state and turn off the buzzer 40.

After completing the initialization, the microcomputer 32 performs the control from step 9 onwards until the power is turned off.

That is, first, an interrupt is used to check whether the unlock flag or lock flag is set (encryption password received from the card CAD).(9.15) Unlock data is sent from the card CAD and this If there is an unlock flag as a result of receiving the lock, refer to the vehicle speed V = 36- and check whether it is equal to or higher than the low speed value 71 in order to unlock (unlock).
10). If the value is v1 or higher, it means that the card CAD was operated while the car was already running, so it is either abnormal (misoperation) or dangerous even if it is normal, so proceed to step 9-10. surrounding. And the vehicle speed is 7
Wait until it becomes less than 1.

If the vehicle speed is less than 71, or becomes less than 71,
The presence or absence of the relay 10 off flag (a flag indicating that the relay 10 is off) is checked, and if it is present (the relay 10 is off), the relay 10 is turned on and the relay 1 is turned on.
Clear the 0 off flag (12). The switches 221 to 223, 23 . ~23
With reference to the open and closed state data of the switches 221 to 223 in the open and closed state data (hereinafter simply referred to as state data) of No. 3, the door DI indicates that the switch 222 is closed.
The data indicating "unlock" is sent to the microcomputer 34 of the door D, and if the switch 22+ indicates the closed position, the door D
Data is sent to each of the microcomputers 1 to D4 to instruct them to "unlock".

If the switch 223 indicates closed, the door 1. Send data instructing "unlock" to the microcomputer in I) (13). In response to this, the door that received the "unlock" instruction is unlocked. And the microcomputer 32 is
Clear the unlock flag set by interrupt (
I4: This means that the unlocking instructed by the card CAD has been completed). By turning on the multiple relay 10, the constant voltage circuit 11 is connected to the battery 1, and the door D is turned on.
1-D4, 1. D motor driver, buzzer driver,
Card reader CAR motor driver and amplifier 17. etc., electrical elements with relatively large power consumption are turned on. Next, the process returns to step 9, passes through step 15, and proceeds to step 21.

When the driver gets on board, the engine key cylinder (not shown)
Insert the key (not shown) into the engine key switch 2.
When closed, the microcomputer 32 performs steps 21 to 22.
, and wait for the cart CAD to be inserted into slot 19. When the card CAD is inserted and the switch 13 detects this, the microcomputer 32 proceeds from step 22 to step 23, turns on the relay 10, clears the relay 10 off flag, and the constant voltage circuit 11 stably generates a constant voltage. Wait for the time T to elapse (23), and then read the card (
24).

In this card reading, the microcomputer 32 controls the motor M
e is energized to rotate normally at a constant speed, and the output of the comparator 18 is read.

When the switch 14 detects the card CAD, the motor Mc is stopped there. As a result, the cryptographic information on the magnetic film 24 on the card CAD has been read into the microcomputer 32. The card CAD remains inside the slot 19.

Next, the microcomputer 32 compares the data read from the magnetic film 24 of the cart CAD with the open/close data (held encrypted data) of the DSW-2 (25). If both match, relay 4 is turned on to unlock the ignition circuit IOC and clear the remote lock flag (29: Since the lock was released normally, remove cards CA and D from outside the vehicle.
to release the locked flag (this means entering normal operation).

The data read from the magnetic film 24 of the card CAD is
If it does not match the opening/closing data of SW-2, the card is ejected in step 26 (the motor Me is reversely energized until the switch 13 no longer detects the card), and the card CAD is immediately retracted. In order to prevent this, please set a timer to count the time T327).
Wait for the time to elapse and return to step 9. Then, card reading (24) is executed again. If the read information does not match the encrypted data, the card CAD is scanned at T3 intervals.
Repeat the retraction and ejection.

Now, when the information obtained by reading the card (24) matches the encrypted data set by the DSW-2 and the relay 4 is turned on (unlocking the ignition circuit TGC) (29), the vehicle speed (2) is read. This is done by instructing the A/D converter 30 to convert, giving a data bit synchronization pulse, and serially reading each bit of digital data indicating vehicle speed V data (3
0).

Next, the vehicle speed V is compared with the low speed value ■1 and the high speed value v2 (
31.37).

If the vehicle speed ■ is less than 71, the vehicle is stopped or at an extremely low speed, so the process proceeds to step 32 in FIG. (indicating that 2 or more is 1-) is cleared, and the data indicating stop is sent to each door D1 to D4. The data is transmitted to the microcomputer 34 of the LD (34).

When Vl<V≦v2, the process proceeds to step 38, and if there is no low speed flag (the current speed has become low), the low speed is transmitted to the microcomputer 34, etc., the low speed flag is set, and the high speed flag is cleared.

When v2≦V, the process proceeds to step 43, and if there is no high speed flag (high speed has been achieved this time), the high speed is transmitted to the microcomputer 34, etc. (44), and the process proceeds to step 45 in FIG. 5c, where the high speed flag is set. (45).

In these cases, for example, when a low speed is detected with the low speed flag present (vl x v≦V2), the low speed has already been transmitted to the microcomputer 34, etc., so there is no need to transmit it again. However, when the same state continues for T2 or more,
As a precaution, data indicating the same low speed is transmitted at intervals of T2 (steps 41 and 42). The same applies to the case of high speed, and the same applies to the case of stop (47.48°35.36).

While the driver closes engine key switch 2 (
Normally, when the engine is running (while the vehicle is running or stopped), such vehicle speed V reading and vehicle speed range information, doors D1 to D4.
Transmission is performed to each microcomputer of T and l.

When the engine key switch 2 is opened (step 49 in Figure 5c), cards CA and D are ejected (49). In this case, the motor Mc is first reversely energized and driven until the switch 13 no longer detects the card CAD, and when the switch 13 no longer detects the cart, the motor M
Temporarily stop C, then energize forward rotation again and turn switch 1.
3 detects the card CAD and stops the motor Mc.

As a result, the car +: CA n stops about half way from the slot i 19, and the switch 13 switches the card CA I.
] has been detected.

Next, the microcomputer 32 instructs the microcomputer 34 of the driver's seat door D1 to intermittently energize the buzzer 40 of the driver's seat D1 (transmits instruction data) (51). This causes the buzzer 40 to sound intermittently. When the driver on the vehicle removes the card CAT) from the slot I9, the switch 13 becomes non-detecting the card. When this is detected, the microcomputer 32 proceeds from step 52 to step 53 and instructs the microcomputer 1] 1 to stop the buzzer (53). This causes the buzzer 4° to stop. Next, the microcomputer 32 turns off the relay 4 (ignition circuit IOC lock 54), sequentially transmits command data requesting status data to the microcomputer of each door, and the microcomputer of each door turns off the switches MS and 36 to 38. The microcomputer 32 receives status data indicating the open/closed status (55).

Read the open/closed state of the manned parking switch 56 (56), and if it is closed (manned parking), all doors are closed (56).
It is determined from the received status data whether the switch MS is open or not, and if all doors are locked, the process returns to step 9 at the beginning of the main flow. When any one door is unlocked (switch 36 is closed), the relay 10 is turned on so that the constant voltage circuit 1.1 can be utilized for locking.

Clear the relay 10 off flag (65). In these steps 64 and 65, when all the doors are locked and the manned parking switch is closed (there is someone inside the vehicle), the lock knob switch (36) is closed and the inside handle switch 36i or outside handle switch 35o is closed. (door opening operation is performed), the microcomputer (
34) performs unlock control (energizing the motor M1 in the reverse direction), and this is to turn on the power to the motor driver 35 at this time. If all doors are locked in step 64,
Check whether the knob switch 36 is closed or the inside handle switch 36i and the outside handle switch 35. Since both are open, relay 10
There is no need to turn it on.

When the manned parking switch 31 is open (the vehicle is unoccupied), the process proceeds from step 56 to step 57, and it is determined from the received status data whether all doors are locked (the nut bar position detection switches MS of all doors are open) or not. It is necessary to determine whether even one of the switches D1 to D4 is closed (closed indicating unlocking)57),
If all doors D1-D4 are locked, all doors D1-D4.
Similarly, determine whether the LD is fully open based on the status data5.
8), all doors D1-D4. When the LD is fully open (switch 38 closed), there is a relay 10 off flag (relay IO
59), and if the flag is present, the process returns to step 9.

If the flag is not present, the relay 10 is on, so the relay 10 is turned off and the relay 10 off flag is set (6
0) Return to step 9. All doors D1-D4. When the LD is not fully closed, at least one door is open or ajar, and the driver is just about to get off the vehicle, is getting off the vehicle, or is just after getting off the vehicle, so
Return to step 9 to wait for the door to be fully opened. When the process returns to step 9, the process returns from step 21 to step 55 to obtain status data for each door again. Unlocked in this state (
Open the door by closing the lock knob switch 36 and closing the inside handle switch 36] or close the side handle switch 35o, then issue a lock command (switch 36 open) in the open state, and when you get out of the vehicle and fully open 1-a, the door opens. is automatically locked. Also, after closing (unlocking) or opening (locking) the lock knob switches 36 of D1 to F) 4, get off the vehicle, and fully close the door, switch 23 of the card CAD from outside the vehicle. When is operated, all doors D are locked by the remote lock control described below regardless of the state of the switch 36.
1-D4. I and D become locked and the remote lock flag is set.

If all the doors D1 to D4 are not locked [the switch SM of at least one door is closed (unlocked)], the process proceeds from step 57 to step 61a, where the presence or absence of a remote lock flag is referred to, and if there is a remote lock flag, ,
When the vehicle is unattended and the vehicle is parked unattended, an instruction is made to lock all doors using the card CAD from outside the vehicle, but since the door locking is not completed, an instruction is given to the microcomputer of the door that is not yet locked (61b).

When there is no remote lock flag (when no lock instruction is given outside the vehicle), refer to the relay off flag,
Since it is seen in the previous step 57 that one of the doors is unlocked, the door is locked in response to a subsequent locking instruction.

Refer to relay 10 off flag and if it is, relay 1
0 is turned on and relay 10 off flag is cleared (6
3) Return to step 9.

With the above control operation, when the engine start switch 2 is off (stopped) and the card CAD is pulled out from the slot 19, and when all the doors are fully open and the manned parking switch 31 is closed (the car is manned), the door When the lock knob switches 36 of D1 to D4 are closed (unlock instruction) and the inside handle switch 36i or the outside handle switch 35o is closed, the power source (11) that enables unlocking is utilized.

Engine start switch 2 is off (stopped) and card CA
I) is pulled out from the slot 19, and if all the doors are fully open and the manned parking switch 31 is open (the vehicle is unmanned), the power supply (11) is turned off and the doors D1 to D4 are unlocked by operating the switches. I can't.

However, when key switch 2 is off (stopped), the card CAr
) is pulled out from the slot 19, all doors are fully open, the manned parking switch 31 is open (the vehicle is unmanned), and there is a remote lock flag (the vehicle is locked in response to a lock instruction from outside the vehicle). Even if the lock knob switch 36 is closed (instruction to unlock) and the inside handle switch 36i or the outside handle switch 350 is closed in the state of It will not be unlocked until then. The vehicle will be unlocked only if an unlock command is given from outside the vehicle using the CAD card.

The explanation will be complicated, but next we will explain remote lock control. As can be seen from the above explanation, in a steady state (state where there is no input change), the microcomputer 32 performs steps 9, 15, 2]
It returns periodically. Moreover, when a signal from the card CAD is received, the unlock flag or lock flag is set to 1 through interrupt. The control operation when the unlock flag is set is as described above.

When any of the switches 231 to 233 of the cart CAD is operated and the lock flag is set to 1 to 1, remote lock control from steps 15 to 16 is started.

First, the microcomputer 32 refers to the presence or absence of the relay 10 off flag, and if so, turns on the relay 10 and clears the relay 10 off flag (17). If there is no relay 10 off flag, the relay 10 is already in the on state, so the process directly proceeds to step 18.

Next, referring to the status data of the switches 231 to 233, if 231 is closed, the microcomputer 32
is door DI-D4,1. data instructing to lock is sequentially transmitted to each of the microcomputers in r). Then, within a predetermined period of time, the door microcomputer (34 etc.) will issue an "abnormal" message.
If data indicating this is not sent, it is assumed that the lock has been completed (19), the relay 10 is turned off, the relay 10 off flag is set, the remote lock flag is set, and the lock flag is cleared (20). When the status data indicates that switch 232 is closed,
A side window fully open instruction is sequentially given to D1 to D4. Although not shown, each of the doors D1 to D4 is equipped with an electric mechanism for driving the side window up and down, and its motor driver and sensor are connected to the microcomputer 34 and the like.

When the status data is data indicating 238 closed,
“Lock” instruction data is sent only to doors I and D.

When 232 or 233 is closed, the remote lock flag is not set even if this transmission is completed.

Next, locking and unlocking control operations of the microcomputer 34 of the driver door D1 will be explained with reference to FIGS. 6a to 6d. Note that the control operations of the microcomputers of the other doors D2 to D4 are exactly the same as the operation of the microcomputer 34, and the power supply (12)
The connection with the microcomputer 32 is also exactly the same. The door LD's microcomputer also performs similar control operations, but the lock switch (
36) close (unlock instruction), inside handle switch 36i and outside handle switch 36
It is designed not to respond to 0.

Since the output voltage of the constant voltage circuit 12 is applied to the microcomputer 34, the power is always on after the circuit 2 is connected to the battery 1. The microcomputer 32 interrupts the microcomputer 34 and transmits instruction data to the microcomputer 34. First, the interrupt control of the microcomputer 34 will be explained with reference to FIG. 6a.

When the microcomputer 32 sets the interrupt hold TNT of the microcomputer 34 to L, the microcomputer 34 proceeds to the interrupt control shown in FIG. 6a, and reads the serial data sent by the microcomputer 32 to port Ip (66).

Next, the read data is decoded, and if it is un[1-tsuku instruction data, the process proceeds to unlock control from step 68 onward, and if it is lock instruction data, it proceeds to lock control from Stellar Ruff 9 and below. If so, proceed to step 85 and subsequent steps.

First, step 68 assumes that it is unlock instruction data.
To explain the unlock control below, refer to whether the switch MS is open (locked state) or not (68), and if it is open (locked state), motor M1 is set to normal rotation bias, and the T4 timer (nut dedicated) is set. 46 from the locked position to the unlocked position shown in FIG. 4), and wait for T4 to elapse. When T4 has elapsed (7
3) Stop the motor M1, set the unlock flag (indicating that the nut rod 46 has been driven to the unlock position) (74), and return to the main routine (FIGS. 6c and 6d) to be described later.

If the switch MS is closed (the nut rod 46 is not in the locked position) when the unlock instruction is issued (67), (68)
), the presence or absence of an unlock flag (indicating that the nut shaft 46 has been driven to the unlock position) is referred to (69). If there is an unlock flag, the nut rod 46 is already in the unlock position, so the process returns to the main routine. If there is no unlock flag, either the nut rod 46 is between the lock position and the unlock position, or the switch MS is abnormal.
One of the possible causes is that the data held by the microcomputer itself (unlock flag) is abnormal. Therefore, in order to once return the NAND stick 46 to the lock position, which is the base point, the motor M1 is set to forward rotation, the timer T4 is set, and a change in the state of the switch MS (from closed to open) is waited for. When the switch MS is opened at a time lower than T4 (71), it means that the nut rod 46 has reached the lock position, so the process proceeds to the above-mentioned unlock drive control from step 72 onwards. If T4 elapses without switch MS opening (75), motor M1
and sends data indicating "abnormality" to the microcomputer 32. The microcomputer 32 executes abnormality processing. Although the hardware and control operations related to this abnormality processing are not shown, when the microcomputer 32 receives data indicating an abnormality,
The door that sent it turns on an indicator light indicating that there is an abnormality.

Next, to explain the lock control from step 79 onwards, assuming that the microcomputer 34 receives the lock instruction data from the microcomputer 32, check whether the switch MS is open (locked state) or not (79), and if it is open (locked state). Return to main routine. If it is not open (locked state), the motor M1 is set to normal rotation bias, the timer T4 is set (80), and waits for the switch MS to open. When opened, motor M1
is stopped, the unlock flag is cleared (83), and the process returns to the main routine. If switch MS is not opened within time T4 (82), motor Ml is stopped and microcomputer 32
Sends data indicating "abnormality" to. The microcomputer 32 is
In response to this abnormality, an indicator light indicating the abnormality of the door D1 is turned on.

Next, when the microcomputer 32 sends the speed range data to the microcomputer 34, if the speed range data indicates "high speed" (85), it sets the high speed flag and clears the stop flag and the low speed flag. (86) and returns to the main routine. If the speed range data indicates "low speed" (87), the low speed flag is set, the stop flag and the high speed flag are cleared (88), and the process returns to the main routine.

When the microcomputer 32 sends the buzzer intermittent energization instruction data to the microcomputer 34, steps 91 to 9 in FIG. 6b are executed.
Proceed to step 2 to set the buzzer intermittent activation flag 92).
Return to main routine.

When the microcomputer 32 sends the buzzer stop instruction data to the microcomputer 34, the process advances to steps 93 to 94 in FIG. 6b to clear the blur intermittent activation flag (94), and return to the main routine.

When the microcomputer 32 sends status data request data to the microcomputer 34 (95), the microcomputer 34 sends data indicating the open and closed states of the switches MS and 36 to 38 to the microcomputer 32 (96), and returns to the main routine. Return. The microcomputer 3;2 interrupts the microcomputer 34 and executes data reception Ni6), but when the received data cannot be decoded, the microcomputer 34 sends a data retransmission request to the microcomputer 32.97) Returns to the main routine. do.

Next, the main routine of the control operation of the microcomputer 34 shown in FIGS. 6c and 6d will be explained.

Referring first to FIG. 6c. When the power is turned on (98:
When the output voltage of the constant voltage circuit 12 becomes a constant voltage), the microcomputer 34 executes initialization (99), and in this initialization, sets the internal registers and input/output ports to the initial state (motor stop, buzzer stop), Next, the state of the lock switch 36 is read, and if it is open (lock instruction), the nut bar 46 is driven to the lock position (Fig. 4), and if it is closed (unlock instruction), the nut bar 46 is unlocked. Drive to lock position.

Next, the microcomputer 34 checks the presence or absence of the buzzer intermittent energization flag (101), and if it does not have it, clears the energization start flag (this is cleared at initialization) and stops the buzzer 40 (this is also (stopped at initialization). If there is an intermittent buzzer energization flag (intermittent buzzer energization is instructed by the microcomputer 32 by an interrupt), refer to the presence or absence of the energization start flag (indicating that intermittent buzzer energization has already started). If there is no such flag, set the energization start flag (102, 103), set the timer that determines the energization period T5 of intermittent energization, set the T5 flag to indicate that this has been set, and energize the buzzer 40. is set (102). This causes the buzzer 40 to sound.

Then, the process goes around another control loop and returns to step 101-1.
02, but this time there is an energization start flag, so check whether there is a T5 flag (105), and since it is present, check whether the T5 timer is over. If the T5 timer has not exceeded, step 101-102-10 is executed again.
Go around the loop of 5-106. During this time, the buzzer 40 is sounding.

When the T5 timer expires, the T6 timer is set, the T5 flag is cleared, and the buzzer 40 is turned off (1
07). Then, in step 101, another control loop is passed.
-102-105-108 and wait for T6 to pass. During this time, the buzzer 4o is stopped. When T6 has elapsed, the process advances from step 108 to step 104 and the buzzer 4o is activated.
Set to ring energization. Buzzer 40 between T5 like this
on.

The buzzer 40 is off for the next T6, the buzzer 40 is on for the next 1''5, etc., and continues as long as the buzzer intermittent activation flag is present. When received, the buzzer intermittent energization flag is cleared, so
This intermittent energization of the buzzer continues after the microcomputer 32 instructs intermittent energization of the buzzer until it instructs the microcomputer 32 to stop the buzzer.

While the buzzer 40 is being energized intermittently in this manner, and also while the buzzer 40 is being stopped, the control in step Il+ and subsequent steps is executed.

That is, with reference to the signal levels of input ports P8 and P2, if the signal levels are L (lock knob switch 36 closed and inside handle switch 36i or outside handle switch 36o closed: lock instruction), the lock control from step 112 onwards is executed. , H (unlock instruction), the unlock control from step 123 onwards is executed.

First, unlock control will be explained. Input port P8 or P
The signal level of 2 is 1. (Lock knob switch 36 closed and inside handle switch 36i or outside handle switch 36. Closed: Unlock instruction), refer to the high speed flag 123). If this occurs, the car is running at high speed, so the The process proceeds to lock control in step 112 and subsequent steps. If there is no high-speed flag, refer to the low-speed flag (124); if not (extremely low speed or stopped), refer to the unlock flag; if present, the vehicle is already unlocked, and the process returns to step 101. If there is no unlock flag (locked state), step 132 in FIG.
-140 unlock operations are performed. This unlocking operation is exactly the same as the unlocking operation of steps 68 to 74 in FIG. 6a, which have already been explained, so the explanation here will be omitted.

When there is a low speed flag in step 124, the car is running, so the state of the door ajar switch 37 is checked, and if it is closed, the door is open, so 71-40 is set to the sound activation cellar 1. (121'l) Return to step 101. If the switch 37 is open, the door is half open or fully open, so the state of the fully open door switch 38 is also referred to (
127). When the switch 38 is open, the door is fully open and the buzzer 40 is turned off. However, if the buzzer is being energized intermittently as described above, it is necessary to keep the buzzer on, so the energization start flag (step 129) When there is no buzzer 40, the buzzer 40 is turned off (130). If the switch 38 is closed, the door is ajar, so the buzzer 40 is set to sound (1).
27-128).

Now, when the door is fully open, the unlocking operation in steps 132 to 140 is performed. Note that the door is unlocked when the speed is low, and when the door is about to be opened, the buzzer 40 continuously sounds when the door is left ajar. Naturally, it beeps continuously even when the door is opened.

Next, the lock control operation will be explained. When the lock switch 36 is open (lock instruction), or even if it is closed (unlock instruction) and the vehicle is running at high speed, the process proceeds to step 112 and subsequent lock control operations. In this case, first, the state of the door ajar switch 37 is referred to, and if it is closed, the door is open, so the buzzer 40 is set to sound (114). When the switch 37 is open, the state of the fully open switch 38 is referred to, and when it is closed, the door is ajar, so the buzzer 40 is also set to sound (114). If the switch 38 is open, the door is fully open, so if there is no energization start flag, the buzzer 40 is stopped (116) and step 117
-122 lock operations are performed. This locking operation is exactly the same as the locking control operation in steps 79 to 84 in FIG. 6a, so a description thereof will be omitted here.

In the embodiment described above, the microcomputers 34 and the like of the doors D1 to D4 operate in response to locking and unlocking instructions from the microcomputer 32, as well as the lock knob switch 36. Locking/unlocking is stored according to the open/closed states of the inside handle switch 361, outside handle switch 360, etc. Also, depending on the vehicle speed from the microcomputer 32,
Further, locking/unlocking control and buzzer energization control are performed depending on the open/closed states of the door open/close detection switches 37 and 38. Therefore, the security operation is not performed in the unlock control of the door microcomputer, but the host microcomputer 32 refers to the state in which the vehicle is placed and controls the relays 4 and 4.
In a state where the possibility of vehicle theft is high, the relays 4 and 10 are kept OFF to prevent the engine from starting and the doors from being unlocked. When the relay 10 is off, the constant voltage circuit 11 is cut off from the battery 1, and power is not turned on to the motor drivers 35, etc. of 1 to A, so even if the door microcomputer 34, etc. is activated, the door cannot be opened. . In this embodiment, the luggage door at the rear of the vehicle is also equipped with a door lock device similar to the door lock device shown in FIG. 4, and a door lock device similar to the door DI control unit shown in FIG. is the top microcontroller 3
Connected to 2. However, the luggage door is only equipped with an opening/closing instruction switch corresponding to the outside handle switch 36o, and the microcomputer of this luggage door control unit unlocks only when an unlock instruction is received from the microcomputer 32, and the outside handle switch Locks when closed.

Although not shown, the doors D1 to D4 are equipped with a window drive mechanism and a window opening/closing switch. It is connected to the door's microcomputer. The door microcomputer controls the window operation according to the window closing instruction from the host microcomputer 32 and the state of the window opening/closing switch.

Therefore, the output of the constant voltage circuit 11 is given to the motor driver that energizes the window movement motor, and the door microcomputer fully opens the window when it receives an instruction from the host microcomputer 32 to fully open the window, and otherwise. Performs window opening/closing control according to instructions from the window opening/closing switch. When locking is instructed using card CAD when the manned parking switch is open (vehicle is unattended), the power to the motor driver of the window movement motor is cut off, so the door microcomputer will not operate the window. However, the window won't open.

As described above, in this embodiment, the code data is changed every time the code for unlocking the door is sent using the card CAD, so the effect of preventing =63-+l from intrusion into the car by a third party due to code theft is achieved. expensive. The code change is automatic and does not require any additional effort from the cardholder. In the above-mentioned embodiment, when the manned parking switch is open (the vehicle is unoccupied) and the remote lock state is in the remote lock state (the state is locked using the card CAD from outside the vehicle), the lock knob switch is unlocked (closed) and the inside handle switch 36i is
Alternatively, even if the outside handle switch 36o is closed, the door will not be unlocked, resulting in a high crime prevention effect. Furthermore, since the engine ignition circuit IOC will not operate unless the code on the card CAD matches the code held by the microcomputer 32, the effect of preventing car theft is even higher.

In another embodiment of the present invention, the door lock device (FIG. 4) is driven to release the lock lever 45 in conjunction with the operations of the inside and outside handles of the door. That is, the pole 43 is driven by a mechanical mechanism.

In the preferred embodiment of the present invention described above, this mechanical mechanism is omitted, and an inside open instruction switch that is closed when the inside handle is operated and an outside open instruction switch that is closed when the outside handle is operated are provided. Connect to the door's microcomputer and lock lever.
45 is connected only to the nut holder 46, and only the nut holder 46 directly drives the lock lever 45 to rotate (release operation).
It is configured to do this. The lock knob switch is left as is.

Then, when the lock knob switch is open (lock instruction) or when a lock instruction is received from the host microcomputer 32, the door microcomputer drives the nut rod 46 to the lock position, and the lock knob switch is closed (unlock instruction).
When the inside handle switch 36i or the outside handle switch 36o is closed, the nut rod 4
6 is driven to the unlocked position and held at that position, and when the inside handle switch 36i or the outside handle switch 360 returns to the open position, control is performed to return the nut rod 46 to the locked position.

Further, in the above embodiment, the door microcomputer is configured to operate according to instructions from the host microcomputer and the door switch. For example, the host microcomputer 32 sends a lock continuation instruction to the door microcomputer 34, etc. The microcomputer 34 or the like may continue to lock without responding to the door switch until the lock is continuously released.

Furthermore, in the above-mentioned embodiment, the host microcomputer 32 and the microcomputer 34 of each door are used to exchange data between them. In the system, control may be performed by the host microcomputer 32, the microcomputer 34 of each door, etc.

〔Effect of the invention〕

In any case, according to the present invention, since the code for unlocking is automatically changed, the code is not stolen, and the safety of the vehicle lock is increased, resulting in a high crime prevention effect. Code changes do not require human intervention.

[Brief explanation of drawings]

FIG. 1a is a block diagram showing the configuration of an embodiment of the present invention. FIG. 1b is a perspective view showing an outline of the appearance of the driver door. FIG. 2 is a side view showing an outline of the mechanism of the card reader CAR shown in FIG. 1. FIG. FIG. 3a is a plan view showing the surface of the card CAD that transmits encrypted data. FIG. 3b is a plan view showing the back side of the card CAD. FIG. 3c is a block diagram showing electrical elements equipped with the card CAD. FIG. 4 is a side view showing the door lock mechanism installed on the driver's door on the vehicle, with a part cut away. 5a and 5b are flowcharts showing an outline of the interrupt control operation of the microprocessor 32 shown in FIG. 1. FIG. FIG. 5c is a flowchart showing the control operation of the microb [1 processor TM] shown in FIG. 3c. 5d and 5e are flowcharts showing an outline of the control operation of the microprocessor 32. FIG. 6a and 6a are flowcharts showing an outline of the interrupt control operation of the microprocessor 34 installed in the driver's door D1. 6c and 6d are flowcharts showing an outline of the control operation of the microprocessor 34. FIG. 1: Onboard battery 2: Engine key switch 3: Ignition coil 4: Relay 5 switching transistor 7: Pink up coil 8.9: Relay driver 10: Relay 11.12:
Constant voltage circuit 13.14: Card detection switch 16: Magnetic reading head 18; Comparator CAD: Card (code generator) ATI, Ar1: Antenna DSW-1, 2: Dip switch FFI: Flip-flop 19 Nislot 20, 21: Roller 22: Unlock transmission instruction switch 23: Lock transmission instruction switch 24: Magnetic film 25: Power switch 26: Permanent magnet gear 27: Reed switch 31: Manned parking switch (condition specification switch) 32: Microprocessor (lock control means) Change information generation means) 33: Input/output interface 34: Microprocessor (lock control means) 35: Motor driver (lock driver) MS: Lock position detection switch 36: Lock switch (unlock instruction switch) 37
: Switch for ajar door detection 38: Switch for door fully open detection 39; Buzzer driver 40: Buzzer 41 Striker 42: Latch member 43: Pole 4
4: Shaft 45: Lock lever 46: Natsutoko 47: Screw-off procedure amendment (method) November 5, 1985 Michibe Uga, Commissioner of the Patent Office
. −. 1. Indication of the incident 1985 Patent Application No. 162349 2
, Title of the invention On-vehicle lock control device 3, Relationship with the person making the amendment Patent applicant address 2-1 Asahicho, Kariya City, Aichi Prefecture Name
(001) Aisin Seiki Co., Ltd. Representative Kiyoshi Ito 4, Agent Address: 103 Phone: 03-864-6052
Address: 2-27-6-5 Higashi Nihonbashi, Chuo-ku, Tokyo Date of amendment order: October 9, 1985 (Shipping date: October 29, 1985) 7.
[Figures 6a and 6a] on page 68, line 20 of the Specification of Contents of Amendment are corrected to ``Figures 6a and 6b.'' From then on

Claims (7)

[Claims] (1) Locking/unlocking setting device that sets the locking/unlocking of the on-board electric locking device; Code generator; Compares the code generated by the code generator with the unlock code held, and releases the lock if it matches the unlock code. Lock control means for giving an instruction to the lock/unlock setting device; and information for changing the code to be generated by the code generator when the unlock code is matched, and information for changing the unlock code held by the lock control means. An on-vehicle lock control device comprising: means for generating change information. (2) The change information generation means is a lock control means; the lock control means compares the generated code of the code generation device with the unlock code held, and if it matches the unlock code, issues an unlock instruction to the lock/unlock setting device. A lock control means that modifies the unlock code that is given to and held by the code generator and provides the change information to the code generator;
The on-vehicle lock control device according to claim 1, which is a code generation device that generates a new code based on change information. (3) The on-vehicle lock control device according to claim 1, wherein the on-vehicle electric lock device is an on-vehicle door lock device. (4) The on-board electric lock device is an on-board door lock device and an engine ignition circuit lock device; the lock/unlock setting device is a door lock/unlock setting device and an engine ignition circuit that lock and unlock the on-board door lock device. It consists of an ignition circuit lock/unlock setting device that energizes and de-energizes the locking device; the code generator includes a door code generator that generates a door unlock code, and an ignition circuit unlock code generator that generates an ignition circuit unlock code. An on-vehicle lock control device according to claim (1). (5) The change information is data indicating changes to be made to the unlock code immediately before it is created. 4
) On-vehicle lock control device described in item 2. (6) The on-vehicle lock control device according to claim 1, wherein the lock/unlock setting device is a lock/unlock storage device that stores an unlock state in response to a lock release instruction. (7) The on-vehicle door lock device is the on-vehicle lock control according to claim (6), wherein the release is operated in response to the operation of the inside handle or the outside handle when the locking/unlocking storage device stores the unlocking. Device.