JPS6337742B2 - - Google Patents

Description

[Detailed Description of the Invention] <<Industrial Application Field>> The present invention relates to a vehicle theft prevention device that issues an alarm if a door, trunk, etc. are opened by unauthorized means while the device is set to an unauthorized intrusion standby state. In particular, the present invention provides an anti-theft device for a vehicle that prevents setting errors caused by unintentional rotational operation of a key cylinder.

≪Prior art and its problems≫ Conventional anti-theft devices for vehicles of this type include:
For example, Delco related to the April 1980 issue.
There is something described in the Auto Radio Service Bulletin of Electronics.

Based on this device, the applicant of this application previously filed a patent application.
Nos. 58-158037 to 158040 (unpublished) propose anti-theft devices for vehicles with improved usability, quality, and performance. First, we will introduce this proposed device into the first
This will be explained with reference to the circuit diagrams and flowcharts shown in FIGS.

In FIG. 1, a battery 1 is installed in a vehicle, and the battery 1 is used to operate the vehicle while driving.
The microcomputer 2 is made operable regardless of what happens after the vehicle is left parked.

The ignition switch 3 is a switch that is turned on when a key switch attached to the driver's seat of the vehicle is set to the ignition position.

The unlocking operation detection switch 4 is a switch that is turned on approximately at the same time as the lock mechanism is unlocked when a key is inserted into a key cylinder attached to a vehicle door or trunk and rotated toward the unlocking side.

Similarly, the locking operation detection switch 5 is a switch that turns on almost simultaneously with the locking of the locking mechanism when the key is inserted into the key cylinder and rotated toward the locking side.

The door switch 6 is a switch that is turned on when any of the vehicle doors is open and turned off when all the doors are completely closed.

The hood switch 7 is a switch that is turned on when the hood of the vehicle is open and turned off when it is completely closed.

The trunk switch 8 is a switch that is turned on when the trunk of the vehicle is open and turned off when it is completely closed.

The lock state detection switch 9 is a switch that is turned on when any of the lock mechanisms provided on each door of the vehicle is unlocked, and turned off when all of them are locked.

As will be described later, the indicator lamp 10 is used to warn the door ajar or to display the status of an anti-theft device when the device is set, and is attached to the instrument panel of the vehicle.

The relay 11 is driven by the output of the microcomputer 2 and energizes the alarm lamp 12 and alarm horn 13.

Alarm lamp 12 and alarm horn 13
This system issues a warning when a door, trunk, hood, or other outer shell opening/closing part of a parked vehicle is opened by unauthorized means.

Next, the basic operation of this anti-theft device for a vehicle will be schematically explained with reference to FIG.

In order for this type of anti-theft device for a vehicle to function normally, it is necessary to set the operation of the device to an unauthorized intrusion standby state, or to reset it from an unauthorized intrusion standby state.

This occurs when a vehicle occupant gets in or out of the vehicle, or when the vehicle owner returns to the parked vehicle, inserts the key into the key cylinder to release the lock mechanism, and opens the door or trunk. This is to prevent this from being emitted.

Furthermore, considering that people may forget to set or reset the settings, it is unreasonable to require the vehicle owner to operate a special switch when setting or resetting the settings. Preferably, the anti-theft device is automatically set or reset in response to normal vehicle operations performed by a vehicle owner or the like after returning to a parked vehicle.

Therefore, in this device, first, following the initial processing in step (10), it is checked in step (20) whether or not the above-mentioned parking operation has been performed.

In this parking operation confirmation process, for example, the vehicle driver turns off the engine, locks the locking mechanism of each door except the driver's door, gets out of the vehicle, closes the driver's door, and presses the key cylinder installed on the driver's door. Insert the key and turn it in the lock direction, or turn off the engine, lock the lock mechanism on each door except the driver's door, get out of the vehicle, push down the lock knob on the driver's door to lock it, and then close the door. This is done by sequentially confirming that a so-called keyless lock operation has been performed.

In the following step (30), in order to confirm that the vehicle has been left behind after being parked, it is confirmed that there are no occupants in the vehicle.

This confirmation process is performed by determining whether the engine has been started or the door has been opened by inserting the key into the key cylinder again within a certain period of time after confirming the parking operation in step (20). .

When the parking operation confirmation and the occupant absence confirmation are completed in this manner, the operation of the device is automatically set to an unauthorized intrusion standby state, that is, the theft prevention process in step (40) is started.

In this anti-theft process, if any of the vehicle doors, trunks, hoods, etc. are opened by unauthorized means, an alarm is immediately issued.

On the other hand, if an act other than the prescribed parking operation or an act indicating the presence of an occupant is performed during the parking operation confirmation process (20) or the occupant absence confirmation process (30), the device will be activated as shown by the dotted line in the figure. The operation returns to the parking operation confirmation process again.

In addition, if the vehicle owner performs a normal act such as inserting the key into the key cylinder and opening a door or trunk while the anti-theft process (40) is being performed, as shown in the dotted line, A return from the theft prevention process (40) to the parking operation confirmation process (20) is performed, and the operation of the device is reset from the unauthorized intrusion standby state.

Therefore, if the vehicle owner opens the door or trunk using normal means, a warning will not be issued inadvertently.

Next, details of the parking operation confirmation process will be specifically explained with reference to FIG.

This parking operation confirmation process is performed when the driver locks the driver's door by inserting the key into the key cylinder to park the vehicle, and when the driver locks the driver's door by inserting the key into the key cylinder to park the vehicle, and when the driver closes the door by pressing down on the lock knob without using a key. This is done in two different ways, corresponding to the two cases of locking.

Assuming that the vehicle is currently running, in this state the steps (100) → (101) →
(107) → (100) is executed repeatedly, and the indicator lamp is turned off.

From this state, for vehicle parking, (vehicle stop)
→ (engine stops) → (locks the lock mechanism of each door except the driver's seat using the lock knob) → (driver's door opens)
→ (Close the driver's door) → (Insert the key into the key cylinder to lock the lock mechanism of the driver's door) are performed in sequence, then step (100) → (107) → (108)
The process proceeds sequentially, and the transition to the occupant absence confirmation process is automatically performed.

On the other hand, in order to park the vehicle by keyless lock operation, (vehicle stop) → (engine stop) →
When (driver's door opens), steps (101) -> (102) -> (103) -> (109) -> (102) are repeatedly executed, and the indicator lamp flashes.

In this state, when the lock mechanism of each passenger seat door and the lock mechanism of the driver's door are locked with the lock knob, the steps (103) → (104) → (105) →
(106)→(103) are repeatedly executed, and the indicator lamp is in a continuous lighting state.

Next, when the driver's door is closed using a so-called keyless lock operation, the execution result of step (106) is
The result is YES, and the transition to the occupant absence confirmation process is automatically performed.

If the ignition switch is turned on or any door is unlocked using the key during the above operation, the execution result of step (105) becomes YES and the process returns to step (100). be returned.

Next, details of the occupant absence confirmation process will be explained with reference to FIG.

When the occupant absence confirmation process is started, the indicator lamp is maintained in a continuous lighting state through steps (201) and (202), and a lamp timer is started.

Here, if the confirmation result of the parking operation confirmation process is incorrect, for example, if the door is simply closed and the lock mechanism is locked in order to restart the vehicle, in such a case, the lamp timer The ignition switch is normally turned on before the timing is completed.

Then, the execution result of step (203) becomes YES, and the occupant absence confirmation process is reset and returned to the parking operation confirmation process, thereby preventing an erroneous transition to the unauthorized intrusion standby process.

Additionally, if the vehicle owner returns to the vehicle during the occupant absence confirmation process and releases the lock mechanism by inserting the key into the key cylinder, the occupant absence confirmation process will be reset in the same way.

On the other hand, if the confirmation result in the parking operation confirmation process is correct, step (205) is executed following step (204) at the end of the lamp timer, the indicator lamp is turned off, and the parking operation is started. After displaying to the person that the anti-theft device is set to standby for unauthorized intrusion,
The transition to anti-theft processing is automatically performed.

Next, details of the theft prevention process will be explained with reference to FIG. 5.

When anti-theft processing starts, steps (301) → (302) → (301) are repeatedly executed.
It will be in a waiting state for unauthorized intrusion.

In this state, the trunk, hood,
When a vehicle outer shell opening/closing part such as a door is opened by unauthorized means, step (303) is executed following execution of step (302), and relay 11 is activated to issue an alarm (audio and display). , the alarm timer is started in step (304), and steps (305) → (306) → (305) are repeatedly executed until the alarm timer finishes counting, and the alarm continues to be issued. .

When the alarm time ends, the execution result of step (306) becomes YES, and then step (307) is executed and the alarm is temporarily stopped.
Thereafter, the operations from step (301) are repeated.

On the other hand, when waiting for unauthorized access or during alarm,
When the vehicle owner returns to the vehicle and inserts the key into the key cylinder to unlock the lock mechanism, the unlock operation detection switch 4 is turned on and the execution result of step (301) or (305) becomes YES. ,
A reset from the unauthorized intrusion standby state or a reset from the unauthorized intrusion standby state and an alarm stop are performed.

By the way, in such a vehicle anti-theft device, the key cylinder attached to the door and the door lock mechanism are generally installed at a considerable distance from each other, and there is a transmission mechanism between the two using a lever or a link. connected.

For this reason, when considering the mass production of vehicles, it is difficult to obtain uniform precision in the movement play of the transmission system from the key cylinder to the lock mechanism for each product. If the key cylinder is turned too far in the unlocking direction when the key is removed from the key cylinder after the lock is removed, the release operation detection switch is accidentally turned on and the occupant absence confirmation process is reset. may occur rarely.

In such cases, the lock mechanism is not unlocked, so it is difficult for the operator to notice that the anti-theft device has not been set, and if the vehicle is left unattended, the anti-theft device will no longer be able to function properly. .

If an attempt is made to solve the above-mentioned setting error caused by operating the key cylinder without intending to unlock the lock by mechanical improvement, mass productivity and durability must also be taken into account, which can be a factor in increasing costs.

≪Object of the Invention≫ The object of the present invention is to prevent a device setting error caused by turning the key cylinder too far in the unlocking direction when pulling out the key from the key cylinder after a parking operation in this type of anti-theft device for a vehicle. The objective is to achieve this with an inexpensive configuration without mechanical modification.

<<Configuration of the Invention>> The configuration of the present invention will be described with reference to the claim correspondence diagram of FIG.

In the figure, the set operation control means A corresponds to, for example, a parking operation confirmation process and an occupant absence confirmation process, and determines that the conditions for setting the unauthorized intrusion standby state have been met.

The anti-theft control section B is set to the unauthorized intrusion standby state by the set operation control means A, and is reset from the unauthorized intrusion standby state by the reset operation control means C. Only in the unauthorized intrusion standby state, unauthorized intrusion is detected and an alarm is issued based on the opening/closing signal from the opening/closing state detection means D, which detects the opening/closing state of opening/closing parts of the outer shell of the vehicle body such as doors, trunks, hoods, etc. .

In particular, in this invention, the set operation control means A includes a lock operation detection means A ₁ for detecting a lock operation of a key cylinder attached to the outer shell opening/closing portion of the vehicle body, and a lock operation detection means A ₁ that detects a lock operation of a key cylinder attached to the outer shell opening/closing portion of the vehicle body. It includes timer means _A2 that measures a certain period of time from the time when an operation is detected. Then, the theft prevention control section B provides a prohibition means for prohibiting the reset operation detection means C from resetting while the timer means _A2 is counting time.
It is configured to include B ₁ .

<<Description of Embodiments>> FIGS. 7 to 9 are flowcharts showing the control procedure of the vehicle anti-theft device according to the present invention. In FIGS. 7 to 9, the same components as those of the conventional example shown in FIGS. 3 to 5 are given the same reference numerals, and the explanation will be simplified.

Further, since the hardware configuration of the apparatus of the present invention is the same as that shown in FIG. 1, a description thereof will be omitted.

The feature of this embodiment device is that after inserting the key into the key cylinder and locking the lock mechanism, when the key is pulled out from the key cylinder, the key cylinder is turned too far in the unlocking direction, and based on this, the unlocking operation detection switch is activated. The purpose of this is to prevent the occupant absence confirmation process from being canceled even if the driver is turned on by mistake.Hereinafter, the operation of the device of this embodiment will be explained focusing on this point.

To leave the vehicle alone after parking (stop the engine)
→ (Lock the lock mechanism of each door except the driver's door) → (Driver's door opens) → (Driver's door closes) →
When (inserting the key into the key cylinder and rotating the key cylinder in the locking direction) is performed in sequence, in the flowchart of Fig. 7, step (100) →
(101) → (107) → (1070) are executed in sequence, and a timer is started.

The setting time of this timer is determined in accordance with the maximum time required for locking a door with a normal key after the key is inserted and the locking operation is performed until the key is pulled out.

When the timer is started, step (1071) is repeatedly executed to wait for the timer to complete timing, and upon completion of timing, a transition to the occupant absence confirmation process is automatically performed via step (108).

Thereafter, assuming that the key is pulled out normally from the key cylinder, in the occupant absence confirmation process, the steps are continued until the lamp timer completes timing, as explained in FIGS. (203) → (2030) → (205) → (203) are executed repeatedly, and unless the passenger performs an operation such as turning on the ignition switch during this time, the lamp timer completes timing and shifts to anti-theft processing. is done automatically.

Next, in the theft prevention process, steps (301) → (302) → (301) are repeatedly executed as shown in FIG. When opened, steps (303) → (304) are executed in sequence to generate an alarm, and thereafter steps (305) → (306) are repeatedly executed to keep the alarm sounding for a certain period of time. It turns out.

Furthermore, if the unlocking operation detection switch 4 is turned on in the unauthorized intrusion standby state, the execution result of step (301) becomes YES, the unauthorized intrusion waiting state is reset, and the process returns to the parking operation confirmation process. Become.

On the other hand, after inserting the key into the key cylinder for parking and performing the locking operation, when pulling the key out of the key cylinder, the key cylinder is turned too far in the unlocking direction, and based on this, the unlocking operation is performed. Assuming that the detection switch 4 is turned on by mistake, the time when the unlocking operation detection switch 4 is turned on corresponds to before the timer expires in step (1071).

Therefore, even if the unlocking operation detection switch 4 is turned on before the timer ends, the determination process in step (203) in FIG. 8 cannot detect that the unlocking operation detection switch 4 has been turned on. This prevents the occupant absence confirmation process from being reset erroneously.

Note that in steps (101), (109), and (106) in FIGS. 7 and 9, the states of the door switch 6, hood switch 7, and trunk switch 8 are detected during normal parking operations. Additionally, when the driver returns to the parked vehicle and opens or closes the door or hood, the parking operation confirmation process is restarted.

<<Effects of the Invention>> As is clear from the description of the embodiments above, according to the present invention, in this type of vehicle anti-theft device, after the key is inserted into the key cylinder and the lock mechanism is locked, the key is turned off. This prevents the occupant absence confirmation process from being canceled in the event that the key cylinder is turned too far in the unlocking direction when the key cylinder is pulled out, and the key cylinder unlock operation detection switch is turned on by mistake. Setting errors can be prevented, and since there is no need to add a new mechanism, there is no need to increase the cost of the device.

[Brief explanation of the drawing]

Fig. 1 is a block diagram showing the hardware configuration of a vehicle anti-theft device previously developed (unpublished) by the applicant, Fig. 2 is a general flowchart showing an outline of the control procedure of the device, and Fig. 3 is a flowchart showing details of the parking operation confirmation process in the same device, FIG. 4 is a flowchart showing details of the occupant absence confirmation process in the same device, and FIG. 5 is a flowchart showing details of the theft prevention process in the same device. FIG. 6 is a complaint response diagram of the present invention, FIG. 7 is a flowchart showing details of the parking operation confirmation process of the device of the present invention, FIG. 8 is a flowchart showing details of the occupant absence confirmation process of the device, and FIG. The figure is a flowchart showing details of the anti-theft processing in the device. A...Set operation control means, _A1 ...Lock operation detection means, _A2 ...Timer means, B...Theft prevention control section, C...Reset operation control means, D...Open/close state detection means.

Claims (1)

[Scope of Claims] 1. The door is set to the unauthorized intrusion standby state by the set operation control means, and the door is reset from the unauthorized intrusion standby state by the reset operation control means, and only in the unauthorized intrusion standby state. A theft prevention system for a vehicle equipped with an anti-theft control unit that detects unauthorized intrusion and issues an alarm based on an open/close signal from an open/close state detection means that detects the open/close state of opening/closing parts of the outer shell of the vehicle body such as the trunk, hood, etc. The set operation control means includes at least a lock operation detection means for detecting a lock operation of a key cylinder attached to the outer shell opening/closing portion of the vehicle body, and a lock operation detection means for detecting a lock operation from the time when the lock operation detection means detects a lock operation. a timer means for counting a certain period of time; and the antitheft control section includes a prohibition means for prohibiting the reset operation control means from resetting while the timer means is counting time. .