JPH0515873B2 - - Google Patents

Description

[Detailed description of the invention]

(Industrial Application Field) The present invention relates to a door locking operation determination device for a vehicle such as an automobile, and more specifically, when any door or trunk of the automobile is unlocked by an unauthorized means or method other than a key. The present invention relates to a door locking operation discriminating device used when an automobile anti-theft system that issues an alarm shifts to a standby state in which it can issue an alarm. (Prior Art) In recent years, anti-theft systems have been developed that issue an alarm when a locked car door or trunk is opened by an unauthorized means other than a key, and these systems are actually installed in cars. This type of anti-theft system for cars goes into a standby state when a switch installed in a hidden location of the car is operated, and if the car is stolen by unauthorized means other than the key. It was configured to issue an alarm immediately when a door or the like is opened. By the way, in a car equipped with such a car theft prevention system, a switch etc. must be installed in a hidden place outside the car cabin, and not only are there restrictions on the mounting position of these switches etc., but also the position where the car is parked is restricted. In some cases, there was a problem in that the user could not reach the switch and could not operate the switch to set the alarm to standby mode. (Object of the Invention) The present invention has been made in view of the above-mentioned problems in anti-theft systems for automobiles, etc., and includes a door switch, a door lock, and an unlocking system that responds to the opening and closing of the door to determine whether or not the door of the automobile is keyless locked. To provide a door locking operation discriminating device which makes the discrimination based on a signal from a lock link switch that responds to the door locking operation, shifts the vehicle to an alarm standby state based on this discrimination signal, and eliminates the need for installing a switch or the like outside the vehicle interior. It is an object. (Structure of the Invention) Therefore, as shown in FIG. 1, the present invention includes a door switch 1 that outputs a door open signal and a door close signal in response to opening and closing of a door of an automobile, and a door switch 1 that locks and unlocks the door. a lock link switch 2 which outputs a lock signal and an unlock signal, respectively, and a keyless lock which receives signals from the door switch 1 and lock link switch 2, opens the car door, and then sets the inner lock to the lock position and locks the door. A discriminating circuit 3 is provided for discriminating whether the door has been locked or whether the door has been locked by some other method. This discrimination circuit 3
is a predetermined period of time until a counter (not shown) counts up, which starts counting when a close signal is output from the door switch 1 while the lock link switch 2 is outputting a lock signal. If continues to output,
Outputs a keyless lock signal indicating that the door is locked without using a key. This keyless lock signal can be used as a signal for shifting the automobile anti-theft system to an alarm standby state. (Effects of the Invention) According to the present invention, it is determined whether or not the door of the automobile has been keylessly locked, based on signals from the lock link switch and the door switch, and when the door has been keylessly locked, a keyless lock signal is output. Therefore, the keyless lock signal can be used to shift the automobile anti-theft system to an alarm standby state, eliminating the need for a special switch or the like to be installed outside the vehicle interior. Note that if you close the door without performing a keyless lock operation with the inner lock in the lock position, the inner lock will return to the unlocked position, but the lock link switch will momentarily output a lock signal and the door switch will open again. outputs a door close signal, and if the door is closed insufficiently and then reopened, the door switch will output a door close signal while the lock link switch outputs the lock signal. However, unless the lock link switch continues to output a lock signal and the door switch continues to output a door close signal for a predetermined period of time until the counting means counts up, the keyless lock signal will not be output. There isn't. (Example) Hereinafter, an example in which the present invention is applied to an automobile theft prevention system will be described with reference to FIGS. 2 to 7 of the accompanying drawings. In FIG. 2 showing the overall configuration of the automobile anti-theft system, the control unit 11 is
It has the discrimination circuit 1 shown in the figure and other functions to be described later, and is composed of a one-chip microcomputer and associated parts. This control unit 11 includes input terminals 11a, _11b , .
11p ₅ , output terminals 11q, . An input terminal 11a of the control unit 11 is connected to an ignition terminal IG1 of an ignition switch 12. The ignition switch 12 is turned on from when a key (not shown) is inserted and turned beyond a predetermined position until it is turned back and the key is pulled out; A keyless switch 13 is provided which is turned off while the key is inserted and rotated to a predetermined position.
It is connected between the positive (plus) pole of a battery B whose negative pole is grounded and the input terminal 11b of the control unit 11 via fuses F ₁ and F ₂ . Furthermore, as shown in FIG. A door key cylinder switch 16L provided on the door 15L of the vehicle, a door key cylinder switch 16R provided on the driver's side door 15R, and a key cylinder switch 18 provided on the trunk (back door in the case of a 5-door car) 17 are connected to each other. ing. Input terminal 11 of the control unit 11 above
As shown in FIG. 3, there are a door 15R on the driver's side and a door 15L on the passenger side
Front lock link switches 19R and 19L provided respectively are connected. Input terminal 11 of the control unit 11 above
As shown in Fig. 3, there are a rear lock link switch 21L installed on the left door 20L of the rear seat and a rear lock link switch 21L installed on the right door 20R of the rear seat. 21R are connected to each other. Input terminal 11 of the control unit 11 above
As shown in Fig. 3, an inner lock switch 22R provided on the driver's side door 15R and an inner lock switch 22L provided on the passenger side door 15L are connected between h and ground. has been done. Similarly, between the input terminal 11i of the control unit 11 and the ground, as shown in FIG. It is connected to an inner lock switch 23R provided at 20R. By the way, the mechanism for locking and unlocking the door 15R of the automobile 14 is provided on the outer handle 24 provided on the outside of the door 15R and on the inside of the door 15R, as shown in FIG. 4 for the door 15R on the driver's seat side. The action of the inner handle 25 is transmitted to the door lock mechanism 27 via the lock mechanism 26, and when the door key cylinder 28 or the inner lock knob 29 is operated to the lock side, the lock mechanism 26 is activated. The actions of the outer handle 24 and inner handle 25 are cut off, and the door is locked. In Fig. 4 above, key cylinder switch 1
6R is turned on only during the key operation period of the door key cylinder 28, and turned off in other states. In addition, the inner lock switch 22R is the inner lock knob 2.
It turns on when the switch 9 is operated toward the unlock position. Furthermore, lock link switch 19R
turns on when the lock mechanism 26 is unlocked. The mechanism for locking and unlocking the door 15L on the passenger seat side also has the same structure as that shown in FIG. 4. Note that the door key cylinder 28 is not provided in the rear seat doors 20L and 20R. Referring again to Figure 2, control unit 1
A left door switch 32L and a right door switch 32R of the rear seat are connected between the input terminal 11j of No. 1 and the ground. Further, the input terminal 11j of the control unit 11 is connected to the cathode of a diode _D1 . A door switch 31 on the driver's seat side is connected between the input terminal 11k of the control unit 11 and the ground.
R and the passenger seat side door switch 31L are connected, and the input terminal 11k of the control unit 11 is connected to the cathode of a diode _D2 . The above four door switches 31L, 31
R, 32L and 32R are doors 15L and 15 respectively.
It turns on when R, 20L and 20R open, and turns off when it closes. Remaining input terminal 11 of control unit 11
A trunk switch 33, a bonnet switch 34, an inclination sensor 35, and an option switch 36 are connected between 1, 11m, 11n, and 11o and the ground, respectively. Here, the relationship between the on/off states of the switches described above and the states of the members to which these switches are attached is as shown in the following table.

【table】

[Table] On the other hand, the output terminals 11p ₁ , 11p ₂ , 11p ₃ , 11p ₄ , 11p ₅ of the control unit 11,
This automotive anti-theft system connects the power line lB connected to the positive terminal of battery B through fuse _F3 to the door 15R by means other than the key.
A mode lamp that lights up or blinks sequentially during the process of setting the standby state to issue an alarm when the system is opened to confirm the operating status of the system.
M ₁ , M ₂ , M ₃ , M ₄ , and M ₅ are connected, respectively. Output terminal 11 of the control unit 11
A drive coil X ₁ of the starter cut relay 38 is connected between q and the power line lB.
The starter cutoff relay 38 is a relay that cuts off the power supply to the starter solenoid 39 when the above-mentioned alarm occurs, so that the engine of the automobile 14 cannot be started. One end of the normally closed contact X ₁ -b of the starter cut relay 38 is connected to the starter terminal ST of the ignition switch 12. In addition, if the automobile 14 is equipped with an automatic transmission (not shown), an inhibitor switch 41 and a starter solenoid 39 are connected in series between the other end of this normally closed contact X ₁ -b and the ground. connected to. The above inhibitor switch 41
is turned on when the shift lever of the automobile 14 is in the N (neutral) or P (parking) range, and the engine can only be started in this N or P range. Output terminal 11 of the control unit 11
A horn switch 42 is connected between r and ground, while the output terminal 11r and the power line
Between lB and drive coil X ₂ of horn relay 43
and fuse _F4 are connected in series. One end of the normally open contact X ₂ -a of the horn relay 43 is connected to the power line lB through a fuse F ₄ , and the horns 44 and 45 are connected between the other end of the normally open contact X ₂ -a of the horn relay 43 and the ground. are connected in parallel. Output terminal 11 of the control unit 11
Turn signal lamp 5 is connected between s and ground.
1, 52, and 53 are connected, and a contact 55 of a hazard switch 54 and a flasher 56 are connected in series between the output terminal 11s and the power line IB. Output terminal 11 of the control unit 11
A turn signal lamp 5 is connected between t and ground.
7, 58 and 59 are connected. Output terminal 11 of the control unit 11
A normally closed contact _X3 -b of the relay 61 is connected between the output terminal 11t and the output terminal 11t.
s is connected to the left turn side fixed contact 62L of the direction indicating combination switch 62, and is also connected to the output terminal 11.
t is connected to the right-turn side fixed contact 62R of the combination switch 62. Combi switch 6 above
A normally open contact X ₄ -a of the relay 63 is connected between the second movable contact 62c and the flasher 56. Relay 63 drive coil X ₄ and relay 61
The driving coils X ₃ each have one end connected to the ignition terminal IG of the ignition switch 12.
1, and each other end is connected to ground through another contact 64 of the hazard switch 54. In addition, in FIG. 2, 65 and 66 are room lamps, 67 is a room lamp switch, and 6
8 is an alternator, control unit 11
The power terminal 11v of is connected to the power line lB through the fuse _F5 , and the ground terminal 11w is connected to the ground. Next, the operation of the automobile theft prevention system whose structure has been explained above will be explained based on the flowcharts shown in FIGS. 5, 6, and 7. The anti-theft system for an automobile shown in FIG. 2 starts from a state before the driver's side door 15R or the passenger's side door 15L of the automobile 14 is keylessly locked, and after a predetermined period of time, the door 15R or 15L is keylessly locked. It enters a standby state and performs the following operations (a) to (g) from mode zero to mode 6 until the alarm state or alarm state is cancelled. (a) Mode zero is the operation when the key is inserted into the ignition switch 12,
Steps from the start of step 1000 in Figure 5
After label initialization in 1001, step 1002,
This is done by executing steps 1003, 1004 and 1005. (b) In mode 1, the key is removed from the ignition switch 12, but the key is still on the driver's side door 15.
This is an operation when the R or passenger side door 15L is not opened, and in the mode 1 state, the mode lamp _M1 lights up for 30 seconds to indicate the mode 1 state. Mode 1 is the 5th
Steps 1002, 1003, 1006, 1007, 1008 in the diagram
This is done by executing steps 1009, 1010 and 1011. (c) In mode 2, the key is removed from the ignition switch 12, the driver's side door 15R or the passenger's side door 15L is opened, and the other doors 20R, 20L, bonnet 30 (see Figure 3) or This is an operation when any of the trunks 17 is opened, and in mode 2, the mode lamp _M2 lights up for 30 seconds. In mode 2, steps 1002, 1003, 1006 in FIG.
Execute steps 1012, 1013, steps 1014, 1015,
This is done by executing steps 901, 902 and 903 after executing either 1016 or 1017. (d) In mode 3, the key is removed from the ignition switch 12, either the driver's side door 15R or the passenger's side door 15L is open, and the other doors 15L, 20R, 20L, trunk 17 and bonnet are opened. 30 are all closed and
All doors 15R, 15L, 20R, 20L
Lock link switch 19R, 19L, 21
This is an operation when R and 21L are off, and in mode 3, the mode lamp _M3 lights up for 30 seconds. Mode 3 is step 1002 in FIG.
1003, 1006, 1012, 1013, 1014, 1015, 1016,
This is done by executing steps 1017, 1018, 1019 and 1020. (e) Mode 4 is the operation before either the driver's side door 15R or the passenger's side door 15L is keyless locked and the alarm standby state is entered.In mode 4, the mode lamp _M4 is 30 Lights up for a second. Mode 4 is step 1002 in FIG.
1003, steps 1006 to 1011, and steps 1021 to 1032. That is, in this mode 4, the door 1
A determination, which is a feature of the present invention, is made as to whether or not 5R or 15L is keyless locked. Furthermore, when the count-up is determined in step 1025, the bonnet 30, doors 15R, 15
If either L, 20R, 20L or the trunk 17 is opened, or if the option switch 36 is turned on, the process returns to subroutine 1002 and continues in mode 4. (f) Mode 5 is a standby operation, and the mode lamp
_M5 lights up for 30 seconds. Mode 5 includes steps 2001 to 2014, 2026, 2016, 2017 in Figure 6.
This is done by executing 2032. (g) Mode 6 is the operation when the alarm condition is activated and the alarm condition is canceled. Mode 6 is step 3001 in Figure 7.
This is done by executing 3013 from Next, the operation of the automobile theft prevention system shown in FIG. 2 will be explained in order from mode 0 to mode 6. (a) Mode zero When the engine of the automobile 14 (see Figure 3) is running or the key is inserted into the ignition switch 12, the control unit 11 (see Figure 2) operates as shown in Figure 5. After executing steps 1000 and 1001, a subroutine for checking the status of each related switch is executed at step 1002, and it is determined whether the keyless switch 13 is on at step 1003. If the key is inserted into the ignition switch 12, in step 1004, the keyless switch 13 is turned off and the door switch 31 on the driver's side is turned off.
The R and passenger side door switch 31L are set to have never been turned on (TJCNT←φ), and the mode is set to zero in step 1005 (MODE←φ). Then step
Repeat steps 1002, 1003, 1004 and 1005. (b) Mode 1 When the key is removed from the ignition switch 12 in the state of mode 0, the control unit 11 executes step 1006, and the door switch 31R of the driver's side door 15R and the door switch 31R of the passenger's side door 15L are turned on. Determine whether door switch 31L is on or off (whether doors 15R and 15L are open or closed), and if doors 15R and 15L are closed, step 1007
Then, it is determined whether the mode is currently 4 or not. At this point, the mode is zero, so the control unit 11 executes step 1008 and further determines whether the current mode is one. Since the mode is zero at this point, the control unit 11 returns to step 1009.
Execute and set the mode to 1 (MODE←1)
After that, turn on the mode lamp _M1 for 30 seconds (SET3φ). In step 1011, the control unit 11 determines whether the keyless switch 13 is off and the door switch 31R or 31L is on (TJCNT=1). At this time, since TJCNT=φ,
The control unit 11 returns to the subroutine
Steps 1003, 1006, 1007, and 1008 are executed from 1002, but since the mode is set to 1, step 1011 is executed next. After that, from subroutine 1002 to steps 1003, 1006,
Repeat steps 1007, 1008 and 1011. (c) Mode 2 In mode 1, driver's side door 1
When door 5R or passenger side door 15L is opened and door switch 31R or 31L is turned on, control unit 11 goes to step 1006.
Step 1012 is executed, and the keyless switch 13 is turned off and the door switch 31R of the driver's side door 15R or the door switch 31L of the passenger side door 15L is turned on (TJCNT←
After executing the set 1), step 1013
, turn the above door switch 31R or 31L.
is off and a 4-second judgment of lock link switch 19R or 19L is required (FKCNT←φ). The control unit 11 then executes the determinations in steps 1014 to 1017,
Door switches 31R and 32L for seats other than the front seats are turned on and off, trunk switch 33 is turned on and off, bonnet switch 34 is turned on and off, and rear lock link switches 21R and 21L are turned on and off.
Determine whether the is on or off. When at least one of these switches is on, the control unit 11 in step 901
Determine whether it is mode 2 or not. At this point, the mode is 1, so the control unit 11 executes step 902, sets the mode to 2 (MODE←2), and then lights the mode lamp _M2 for 30 seconds in step 903. The control unit executes steps 1003, 1006, 1012, etc. from subroutine 1002 at the next timing.
After executing step 1013 and executing steps 1004 to 1007, step 901 is executed and the process returns to subroutine 1002, after which this loop is repeatedly executed. (d) Mode 3 In the above state, the door switches 32L and 32R for seats other than the front seats are off, and the trunk switch 33 is turned off.
is off, bonnet switch 34 is off, and all lock link switches 19R, 19L,
21R and 21L are both off, that is, all of the doors 20R and 20L other than the front seats, the trunk 17, and the bonnet 30 are closed, and all lock link switches 19 are turned off.
When R, 19L, 21R, and 21L are turned off, the control unit 11 sets the mode to 3 (MODE←3) in step 1019, and
At 1020, turn on mode lamp _M3 for 30 seconds. Next, subroutine 1002, steps 1003, 1006
Then, steps 1012 to 1018 are executed, but at this point the mode is 3, and the process returns from step 1018 to subroutine 1002. After that, subroutine 1002, step 1003,
1006 and steps 1012 to 1018 are executed repeatedly. (e) Mode 4 Next, in the state of mode 3, the driver's side door 15R or the passenger's side door 15L
one of them is closed and the other is keyless locked (even if one is opened and the other is keyless locked, it remains in mode 3),
That is, when the keyless switch 13 is off, the door switch 31R and the door switch 3
When 1L is turned off, control unit 11
In step 1007, it is determined whether the current mode is 4 or not. Since the mode is 3 at this point, the control unit 11 determines whether the mode is 1 in step 1008, temporarily sets the mode to 1 in step 1009, and executes step 1010 again. do. Thereafter, in step 1011, the control unit 11 determines that the keyless switch 13 is off and the door switch 31R or 31L is on (TJCNT=1), that is,
It is determined whether the key has been removed from the ignition switch 12 and the driver's seat side door 15R or the passenger's seat side door 15L has been opened. At this point, the ignition switch 1
The key was pulled out from 2 and the driver's side door 15
R or passenger side door 15L has been opened, the control unit 11 executes step 1021 and switches the front lock link switch 19R of the driver side door 15R and the front lock link switch 19R of the passenger side door 15L. 19L is off. At this time, either the driver's side door 15R or the passenger's side door 15L is locked and the other is keyless locked, so the front lock link switches 19R and 19L are off and the control unit 11 is turned off. At step 1022, it is determined whether the mode is currently 4, but since the mode is set to 1 at this point, at step 1023, the door 15R on the driver's side or the door 15L on the passenger's side
After starting a standby grace count that defines the time from keyless lock to entering the standby state, the mode is set to 4 in step 1024, and the process returns to subroutine 1002, although specific illustrations and explanations are not provided. Return to subroutine 1002
When this is executed, the mode lamp _M4 lights up for 30 seconds. The control unit 11 performs step 1025.
Then, it is determined whether the count started above has counted up or not. Since the count has not increased at this point, the control unit 11 starts another count in step 1034, and then returns to subroutine 1002.
Return to and execute steps 1003, 1006, and 1007. At this point, the mode is set to 4, so
Next, after executing steps 1021 and 1022, the process returns to step 1002. Thereafter, the control unit 11 repeats the above operations until the count started at step 1023 counts up. When the standby grace period elapses and the above count increases, the control unit 11
executes steps 1026, 1027, 1028, and 1029 in sequence, and switches the bonnet switch 34, option switch 36, and door switch 3 other than the front seats.
It is determined whether or not 2R, 32L and trunk switch 33 are off. That is, door 1
For 5R or 15L, the keyless lock, which is a feature of the present invention, is determined. When at least one of the bonnet switch 34, option switch 36, door switches 32R, 32L, and trunk switch 33 is on, the control unit 11
At step 1034, another count is started again, and the process returns to subroutine 1002 to repeat the above operations. In addition, at this time, the trunk switch 33
is on, control unit 1
1 is set to UP after 30 seconds have elapsed in step 1033, and then starts another counting in step 1034. In this state, the bonnet switch 3
4, option switch 36, door switch 3
When 2R, 32L and the trunk switch 33 are all turned off, another count starts, and the control unit 11 checks in step 1030 whether or not this count has counted up. Determine. This count increases in about 1.5 seconds from the start of counting to the end of counting. Therefore, the bonnet 30 and the door 20
If any of L, 20R, trunk 17, etc. is closed but not completely closed and is opened again, the above-mentioned count is restarted and the count is not increased. That is,
Incomplete closing of the bonnet 30, doors 20L, 20R, trunk 17, etc. will prevent the vehicle from entering the standby state. When the above-mentioned one more count counts up, the control unit 11 starts the step.
1031 is executed, and in step 1035 it is determined whether or not the 30 second count (TKCNT=1) executed in steps 2025 and 2027, which will be described later, is in progress. At this point, TKCNT=1, so
The control unit 11 executes step 1032 and switches the door switches 31L, 31R, 32L,
32R is off, lock link switch 19
It is determined whether it is unnecessary to determine whether L, 19R, 21L, and 21R are in the off state for 4 seconds (FKCNT=1). Note that if TKCNT=1, the control unit 11 executes step 1035 and performs the above process.
Determine the 30 second count. (f) Mode 5 If FKCNT=1, a 3-minute count is started in step 2001, as shown in FIG. This is to prevent an alarm from occurring if a child or the like remains inside the vehicle 14 and the inner lock knob 29 is carelessly operated. When 30 seconds have elapsed when TKCNT=1 and when FKCTN=1, this 3-minute count is not started. After that, the control unit 11 sets the mode to 5 in step 2002 (MODE←5).
Turn on mode lamp _M5 for 30 seconds, and turn on door switches 31R, 31L, 32 in step 2003.
R, 32L off, lock link switch 19
It is set that it is necessary to judge the off state of R, 19L, 20R, and 20L for 4 seconds (FKCNT←φ), and in step 2004, the initial value of the tilt sensor 35 at the parking position of the car 14 is stored or the initial value of the tilt sensor 35 is set. Set the position (tilt sensor set). The control unit 11 has a subroutine
In 2005, door switch 31L of car 14,
31R, 32L, 32R, bonnet switch 33, etc. and the output of the tilt sensor 35, that is, read the output of each sensor, and then proceed to the following steps 2006 and 32.
In step 2020, it is determined whether or not abnormal signals are output from these sensors. That is, if the control unit 11 determines that any one of the tilt sensor 35, the door switches 31R, 31L, 32R, 32L, or the bonnet switch 34 is on in steps 2006 to 2008 of the steps 2006 to 2020, Enter standby mode 3
Regardless of whether it is within minutes or not, an alarm state is entered, which will be described later. In addition, if the control unit 11 determines that the input terminal 11a is on in step 2009, if the keyless switch 13 is off and an attempt is made to start the engine without using a normal key, the control unit 11 enters an alarm state and the keyless switch 13 is turned off. switch 1
3 is on, i.e. when starting the engine using a normal key, the 5th
Return to diagram label initialization (subroutine 1001). Control unit 11 steps 2010
The alarm state is also entered when it is determined that the option switch 36 is on. The above steps 2009 and 2010 are also executed regardless of whether it has been within three minutes since entering the standby state. The control unit 11 performs the steps described above.
After running 2010, inner lock switch 21R,
Judgment of on/off of 21L, 23R, 23L,
That is, it is determined whether the inner lock knob 29 has been operated to the unlock position.
If the inner lock knob 29 is moved to the unlock position due to careless operation by a child left in the vehicle, etc., in step 2023 T ₃ seconds count is started, and then step 2024 is reached.
It is determined whether the 3-minute count that started counting in 2001 has counted up (whether 3 minutes have elapsed since entering the standby state). If it is within three minutes of entering the standby state, that is, if the inner lock knob 29 is inadvertently operated to the unlock position by a child or the like who remains inside the keyless locked automobile 14, within three minutes of entering the standby state. In this case, the control unit 11 sets FKCNT to 1 in step 2028 (FKCNT←1), sets the mode to 4 again in step 2029, and unsets the tilt sensor 35 in step 2030. Return to subroutine 1002. Thereafter, the control unit 11 will enter this subroutine 1002 within 3 minutes after entering the standby state.
From, steps 1003, 1006, 1007, 1021,
1022, 1025 to 1032, 2002 to 2011,
The loops 2023 and 2024 are repeatedly executed, but when the inner lock knob 29 is operated, the front lock link switches 19R, 19L or the rear lock link switches 21R, 21 are activated with a slight delay.
When one of L is turned on, the control unit 11 moves from subroutine 1002 to step 1003.
The loop of executing steps 1006, 1007, 1021, and 1036 and returning to subroutine 1002 is repeated. While this loop is running, the inner lock knob 29
is returned to the locked position and the front lock link switches 19R, 19L or the rear lock link switches 21R, 21L are turned off, the control unit 11 proceeds from subroutine 1002 to steps 1003, 1006, 1007, 1021, 1022,
1025 to 1032, 2002 to 2014,
Executes 2026, 2016, 2017, 2032 and returns to subroutine 2005. From now on, control unit 1
1 is subroutine 2005, step 2006 or
A loop is repeatedly executed from 2014, 2026, 2016, 2017, and 2032 to return to subroutine 2005, and the system enters a standby state. At step 2023 above, a count of T ₃ seconds is started, but if the operating time of the inner lock knob 29 is extremely short, the front lock link switch 1 is turned off after the inner lock switch 22R, 22L, 23R or 23L is turned off.
This is to prevent either the rear lock link switches 9R, 19L or the rear lock link switches 21R, 21L from turning on with a delay and immediately entering the alarm state. In other words, when the standby state is within 3 minutes, the inner lock switch 22R,
Even if 22L, 23R or 23L turns off
T During _{the 3} second count, control unit 11
executes 2012 to 2024, 2028 to 2030, returns to subroutine 1002, and steps 1003, 1006,
The loops 1007, 1021, 1022, 1025 to 1032, 2002 to 2012, 2024, 2028 to 2023 are executed repeatedly, and during that time either the front lock link switches 19R, 19L or the rear lock link switches 21R, 21L are turned on. I try to do that. When either the front lock link switches 19R, 19L or the rear lock link switches 21R, 21L are turned on, the control unit 11 moves from subroutine 1002 to steps 1003, 1006, 1007, and so on.
A loop of executing steps 1021 and 1036 and returning to subroutine 1002 is repeatedly executed. After 3 minutes of waiting, car 1
Unless the doors 15R, 15L, 20R, 20L of No. 4 or the trunk 17 are illegally opened, the control unit 11 executes subroutine 2005, steps 2006 to 2014, 2026,
From 2016, 2017, 2032, subroutine 2005 again
Repeats the loop returning to and enters a virtual standby state. During this waiting period, if any of the tilt sensor 35, door switches 31L, 31R, 32L, 32R, bonnet switch 34, or option switch 36 is turned on, or if the ignition switch 12 is turned on and the keyless switch 13 is turned off. In both cases, an alarm state will occur, which will be described later. Further, when the trunk key cylinder switch 18 of the trunk 17 is off and the trunk switch 33 is on, and the T1 _second count increases, an alarm state will also occur, which will be described later. This T ₁ second count is based on trunk key cylinder switch 18.
This is to prevent an alarm from being erroneously issued when the trunk 17 is opened due to variations in the assembly of the trunk switch 33 and the trunk switch 33.
That is, the trunk key cylinder switch 18
If the trunk switch 33 is turned on even though the switch is turned off, the control unit 11 does not immediately put the
The status of the trunk key cylinder switch 18 and the trunk switch 33 after T ₁ second has passed is determined, and even after T ₁ second has passed, the trunk key cylinder switch 18 is off and the trunk switch 33 is off.
is on, unauthorized access to trunk 17
is assumed to have been opened, and an alarm state is set. On the other hand, even if the trunk switch 33 is turned on,
T Trunk key cylinder switch 1 within ₁ second
8 is turned on, the control unit 11 returns to the execution of the subroutine 1002 in FIG.
A loop is repeated in which steps 1021, 1022, 1025 to 1029, 1033, and 1034 are executed and the process returns to subroutine 1002 again, and the standby state is released. After that, when the trunk 17 is closed, the standby state is resumed. The reason why the 30 second count starts at step 2027 is that if there is luggage etc. on the trunk 17, the trunk 17
Even if the user tries to open the trunk 17, the trunk 17 opens only halfway and the trunk switch 33 remains in the off state. In this case, the trunk 17 must be opened manually, but since the trunk key cylinder switch 18 has already been turned off at this time, an alarm will occur, but this is to prevent this. The door key cylinder switches 16L and 16R are both switches that are turned on only while the key is being operated, but even when the door key cylinder switches 16L and 16R are turned on by normal key operation, they can be turned on as follows. , the standby state is released. For example, door key cylinder switch 16R
When the key cylinder is turned on by normal key operation, the control unit 11 starts counting the key cylinder timer in step 2031. By the way, door key cylinder switch 16R
The same situation exists between the trunk key cylinder switch 18 and the trunk switch 33 between the lock link switch 19R and the lock link switch 19R due to variations in the assembly of the two.
R may be turned on at a timing after the door key cylinder switch 16R is turned on, or may be turned on at a timing before the door key cylinder switch 16R is turned on. The operations in these two cases will be explained below. [When the door key cylinder switch is turned on first] If the lock link switch 19R is turned on after the door key cylinder switch 16R is turned on, the control unit 11 executes steps 2016 to 2031 and starts the key cylinder timer count. Thereafter, in step 2017, it is determined that the lock link switch 19R is off, and the process returns to execution of subroutine 2005 from step 2032. Thereafter, when the lock link switch 19R is turned on, the control unit 11, in step 2018, executes the determination of the key cylinder timer up which has started counting above. Normally, the lock link switch 19R is turned on when the door key cylinder switch 16R is turned on, but at least the lock link switch 19R is turned on after the door key cylinder switch 16R is turned off and before the timer comes up, so the control unit 11 assumes that the door lock has been normally released, and returns to the subroutine 1001 in FIG. 5 with the key cylinder timer up and the lock link timer up in step 2021, and the standby state is released. [When the lock link switch is turned on first] If the lock link switch 19R is turned on before the door key cylinder switch 16R is turned on, the control unit 11
After executing steps 2017 from 2016 and determining that the lock link switch 19R is on, it is determined in step 2018 whether or not the key cylinder timer is up. In this case, since the key cylinder timer count has not normally started, the control unit 11 determines that the key cylinder timer has timed up and starts the step.
After executing 2019 and 2033, return to subroutine 2005. Then subroutine 2005, step 2006 or
A loop that returns to subroutine 2005 from 2014, 2026 to 2019, and 2033 is repeatedly executed. When the lock link switch 19R is turned on by normal key operation, the door key cylinder switch 1 is turned on due to assembly variations between the door key cylinder switch 16R and the lock link switch 19R.
Even if there is a delay in turning on 6R, the door key cylinder switch 16R is turned on before the lock link timer is timed up, and the control unit 11 executes step 2021, returns to subroutine 1001 in FIG. 5, and cancels the standby state. be done. Further, if the door key cylinder switch 16R is not turned on before the lock link timer is up, it means that the key operation is not performed normally, and in this case, an alarm state occurs. Note that the standby state is canceled by the door key cylinder switch 16L in the same manner as described above. (g) Mode 6 When any of the situations in which an alarm should be issued as described above occurs from the state of Mode 5, the control unit 11 starts counting for 3 minutes, which is the alarm duration, in step 3001 of FIG. In step 3002, the mode is set to 6, and the mode lamps M ₁ , M ₂ , M ₃ , M ₄ , and M ₅ flash simultaneously for 30 seconds. Next, the control unit 11 outputs a "low" signal from its output terminal 11q in step 3003.
Output a level signal to energize solenoid X ₁ of starter cut relay 38 shown in FIG.
The normally closed contact X ₁ -b is turned off to prevent the engine from starting. Further, in step 3004, the control unit 11 outputs a "low" level signal from the optional output terminal 11u. Output terminal 11 of this option
If an alarm device (not shown) consisting of, for example, a voice synthesizer or the like is connected between u and the power line lB, it is possible to issue an alarm that the automobile 14 is stolen. Next, the control unit 11 determines whether or not the 3-minute count has increased in step 3005. If the 3-minute count has not increased, the control unit 11 determines whether or not the 3-minute count has increased, and in step 3006, the control unit 11 outputs the output terminal 11r.
The output of the is periodically set to "low" level and "high" level, and the drive coil X ₂ of the horn relay 43 shown in FIG. to occur. The control unit 11 simultaneously connects its output terminals 11s and 11t in step 3007.
The output of the turn signal lamp 5 in FIG.
1, 52, 53, 57, 58 and 59 flash. The control unit 11 has a subroutine
Door key cylinder switch 16L, 1 in 3008
6R, keyless switch 13 and input terminal 1
Execute the routine for reading the output of step 1a, and then turn on and off the door key cylinder switches 16R and 16L in step 3009.
In step 3010, it is determined whether the keyless switch 13 is on or off, and in step 3011, it is determined whether the input terminal 11a is on or off. That is, the door key cylinder switch 16
If R, 16L are off and the keyless switch 13 is off, or if the door key cylinder switch 16R, 16L is off, the keyless switch 13 is off.
When the input terminal 11a is turned on and the input terminal 11a is turned off, the alarm operation is performed until the 3-minute count increases. Even during the above alarm operation, if the door key cylinder switches 16R, 16L are turned on, or if the keyless switch 13 and the input terminal 11a are turned on, the control unit 11 returns to subroutine 1001 in FIG. The condition is canceled. Also, if the 3 minute count increases,
The control unit 11 stops energizing the drive coil X ₂ of the horn relay 43 in step 3012, then stops blinking the turn signal lamps 51, 52, 53, 57, 58 and 59 in step 3013, Stop alarm operation. Incidentally, the starter cut relay 38 continues to be turned on and a "low" level signal continues to be output from the optional output terminal 11a. According to the embodiment described above, the door 15R on the driver's seat side of the automobile 14 or the door 1 on the passenger's seat side
After the 5L is keyless locked, the system checks whether it is okay to go into standby mode within a predetermined period of time, and enters standby mode only if this is confirmed. Doors 20L and 20R other than the front seat side of the automobile 14,
If the bonnet 30, trunk 17, etc. are opened, they are not put into the standby state immediately, but when they are closed afterwards, they are put into the standby state, so there is no possibility that the alarm will go into the alarm state by mistake. do not have. Further, since it is detected that the doors 15R and 15L on the front seat side of the automobile are locked without a key, and the keys are shifted to the standby state by the keyless lock, there is no need to provide a switch or the like outside the cabin of the automobile.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram showing the outline of a door locking operation discriminating device according to the present invention, FIG. 2 is a specific circuit diagram of an embodiment of an automobile theft prevention system to which the present invention is applied, and FIG. An explanatory diagram of the sensor installation position,
Figure 4 is an explanatory diagram showing the relationship between the door key cylinder switch, inner lock switch, and lock link switch and the mechanisms for operating these switches. Figures 5, 6, and 7 are for the automobile shown in Figure 2. It is a flowchart for explaining the operation of the anti-theft system. 1... Standby position, 2... Abnormality detection device, 3...
Alarm device.

Claims (1)

[Claims] 1 After opening a car door, close the door with the inner lock in the lock position, and check whether a keyless lock was used to lock the door from outside the car without using a key, or whether the door was locked by some other method. In the door lock operation discriminating device, a door switch outputs a door open signal and a door close signal in response to opening and closing of the door, and a lock signal and an unlock signal in response to locking and unlocking of the door, respectively. a lock link switch; a counting means that starts counting when the door switch outputs a door close signal while the lock link switch outputs a lock signal; A door locking operation discriminating device comprising: a discriminating circuit that outputs a keyless lock signal indicating that the door is locked without using a key when a door switch continues outputting a door close signal.