JPH0444067B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a device for preventing forgetting to remove a key in a door lock device equipped with a keyless lock mechanism for a vehicle.

Generally, a door lock device equipped with a keyless lock mechanism has the advantage that the door can be automatically locked without using a key due to the operation of the keyless lock mechanism. If you leave the door open, you may accidentally lock the door.

[Conventional technology]

A conventional example of a key removal prevention device for solving this type of problem will be explained based on FIG. 3. The illustrated device includes a key switch 1 that closes when a key is inserted into the ignition key cylinder of a car, a door switch 2 that closes when the door is opened, a handle switch 3 that closes when the outside handle is pulled, and a power switch 3. 4 and a solenoid 5 for releasing the inside lock knob, that is, driving the inside lock knob in the unlocking direction, are electrically connected in series. Therefore, when you open the door without removing the key and pull the outside handle to perform the keyless door lock operation, the key switch 1, door switch 2, and handle switch 3 are closed, so the solenoid 5 is activated and this This electrically interferes with the lock, and the keyless lock mechanism automatically locks the door only when the key is removed.

[Problem that the invention seeks to solve]

However, door lock devices equipped with keyless lock mechanisms currently installed in automobiles generally allow the inside knob to be operated from the unlocked position to the locked position when the outside handle of the door is pulled; Actuation from the unlocked position to the unlocked position is structurally impossible. For this reason, if the above-mentioned conventional key removal prevention device is simply applied to a current door lock device, the solenoid attempts to operate in the unlock direction, but the door lock device cannot actually operate in the unlock direction.

Therefore, it is possible to detect the state of the solenoid and set a timer for a certain period of time when the door lock device cannot operate in the unlock direction, and output an unlock signal after a certain period of time. In addition, it must be equipped with a switch and a timer to detect the state of the solenoid, and even if an unlock signal is output after a certain period of time, if the outside handle is still pulled, the lock will not be unlocked, and if the driver If the key does not work and you leave without realizing that you forgot to remove the key, the key will remain unlocked after a certain period of time, resulting in a lack of theft protection.

Of course, it is also possible to prevent forgetting to remove the key by using the conventional device circuit described above as is.
For this purpose, it is necessary to provide a door lock device with a function different from that of the existing door lock device, and therefore, there are many problems in actually equipping an automobile with this device.

Therefore, the present invention solves the above-mentioned problems, enables keyless locking when the door is closed with the inside lock knob in the lock position and the outside handle of the vehicle door pulled. When the inside lock knob is pulled, the inside lock knob can be moved from the unlocked position to the locked position, but cannot be moved from the locked position to the unlocked position.Without making any changes to the function of door locking devices equipped with current keyless locking mechanisms. Moreover, it is an object of the present invention to provide a key removal prevention device that can prevent the user from forgetting to remove the key without impairing theft prevention properties.

[Means for solving problems]

In order to solve the above object, the device for preventing forgetting to remove a key according to the present invention includes a first detection means for detecting that a key is inserted into an ignition key cylinder, and a first detection means for detecting that a door is closed. a second detection means, a third detection means for detecting that the outside handle of the door has been pulled, and a first determination means for calculating the logical product of the detection results by the first to third detection means; a storage means for storing the determination result by the first determination means; a second determination means for outputting the stored content of the storage means when the third detection means no longer detects; and the second determination means. an unlock actuator that drives the inside lock knob in the unlocking direction by the output of the lock knob; a fourth detection means that detects that the inside lock knob is in the unlocked state; and means for prohibiting driving of the unlock actuator when unlocking of the unlock actuator is detected.

[Effect]

In the above configuration, the key insertion detection by the first detection means, the door closing detection by the second detection means, and the detection of pull-up or pulling of the outside handle by the third detection means are performed. detects the presence or absence of a keyless lock using the keyless lock, and stores this detection result in a storage means, thereby interfering with the pull-up unlocking of the outside handle by the third detection means after the keyless lock, that is, driving the inside knob in the unlocking direction. The operation of the unlock actuator that drives the inside lock knob in the unlocking direction is controlled based on the contents of the storage means outputted by the second determining means in response to the detection of the absence of the lock.

Therefore, when the logical product is 1, that is, when key insertion detection, door closing detection, and pull-up detection of the outside handle are performed, and the memory means stores that the key has been forgotten to be locked, the unlock actuator is activated. can be operated to drive the inside lock knob in the unlocking direction.

Moreover, the unlocking of the inside lock knob is detected by the fourth detection means, and driving of the unlocking actuator is prohibited to prevent unnecessary operation of the unlocking actuator.

〔Example〕

Embodiments of the present invention will be described in detail below with reference to the drawings.

In Fig. 1, 1 is a first unit that detects that a key is inserted into the ignition key cylinder.
A key switch is a detection means for a vehicle and closes when a key is inserted into the ignition key cylinder of a vehicle. Reference numeral 2 denotes a door switch serving as a second detection means for detecting that the door of the automobile is closed, and is closed when the door is opened. 3 is a handle switch as a third detection means for detecting that the outside handle of the door is pulled;
Closes when the outside door handle is pulled. 4 is a battery-powered power source installed in a car. Reference numeral 5 designates an unlock switch as a fourth detection means for detecting that the door lock knob is in the unlocked state, and is opened when the door lock is in the unlocked state.

10 is the key switch 1, door switch 2,
Depending on the states of the handle switch 3 and unlock switch 5, the key switch 1 detects the insertion state of the key into the ignition cylinder, the door switch 2 detects door closing, and the handle switch 3 detects and unlocks the handle. This is a first discriminating circuit that calculates the logical product of door lock detection by switch 5.

Reference numeral 11 denotes a storage circuit that stores the AND output of the discrimination circuit 10. A second discrimination circuit 12 discriminates between the output of the memory circuit 11 and the detection state by the handle switch 3, and outputs the contents of the memory circuit 11 when the handle switch 3 does not detect the pull of the handle. 13, an unlock actuator 14 and a buzzer 15 are activated by the output of the second discrimination circuit 12;
This is a drive circuit that drives the.

In the above, with the key inserted in the ignition key cylinder, that is, with the key forgotten to be removed, the inside lock knob of the door is pressed down and the unlock switch 5 is opened, and the keyless lock is performed in this state. When I try to close the door with the outside handle pulled as far as possible, key switch 1 is closed, door switch 2 is closed, handle switch 3, and unlock switch 5 are open. The instant the door switch 2 changes from open to closed, the door switch 2 opens, and this simultaneously detects the insertion of the key into the key cylinder, the closing of the door, the pulling of the handle, and the locking of the door lock.Based on this, the discrimination circuit 10 outputs an output. Outputs a discrimination signal to the This discrimination signal is stored in the storage circuit 11. That is, if the keyless lock operation is performed while the user forgets to remove the key, the fact is stored in the memory circuit 11 at the moment the door is closed.

At the end of this keyless lock operation, when you release your hand from the handle, the handle switch 3 opens, and the memory circuit 1 opens.
The output of 1 is sent to the drive circuit 13 through the second discrimination circuit 12. The drive circuit 13 drives the unlock actuator 14 in response to the signal from the second discrimination circuit 12, thereby operating the lock knob which is in the locked state to the unlocked state. At the same time, the buzzer 15 is activated to warn that the door is in the unlocked state, and to prompt the user to perform the keyless lock operation again after removing the key.

On the other hand, the door lock knob was not locked.
Lock switch 5 when in unlocked state
is in the closed state and no discrimination signal is obtained at the output of the first discrimination circuit 10, and even if the other three conditions, namely key insertion detection, door closing detection, and handle pull-up detection are performed, the memory is not stored. No discrimination signal is stored in the circuit 11. This prevents the unlock actuator from being activated when the handle is pulled up and the door is closed without the lock knob being in the locked state, and prevents the unlock actuator from performing any extra movement. There is.

FIG. 2 is an electric circuit diagram showing a more specific example of the device shown in the block diagram in FIG.
a, and the first input of the AND circuit 10a is
One end is connected to the other end of the key switch 1, which is connected to the + power supply, and is grounded via a resistor _R1 , and the second input is connected to the other end of the door switch 2, whose one end is grounded, and is connected to the resistor R1. Connected to the + power supply via R ₂ and pulled up, the third
The input is connected to the other end of the handle switch 3, one end of which is grounded, via an inverter 10b, and the fourth input is connected to the other end of the unlock switch 5, one end of which is grounded, via an inverter 10c. ing. The other ends of the handle switch 3 and the unlocking switch 5 are connected to the + power supply via resistors _R3 and _R4, respectively, and are pulled up.

As a result of the above, if the key is not inserted into the ignition key cylinder, the key switch 1
is open, and the output of the AND circuit 10a is at L level regardless of the states of the door switch 2, handle switch 3, and unlock switch 5. On the other hand, when the key is inserted into the ignition key cylinder, the key switch 1 is closed. In this state, when the door is closed by pulling the handle and keeping the handle switch 3 closed in order to perform keyless locking, the door switch 2 changes from closed to open, and all inputs to the AND circuit 10a go to H level. Therefore, the output of the AND circuit 10a is L
Rising from level to H level. At this time, if the inside lock knob is unlocked,
The output of the AND circuit 10a remains at L level. That is, in this embodiment, the AND circuit 10a serves as a means for prohibiting the unlock actuator from being driven.

The memory circuit 11 is set by the rise of the set input S from L to H level, and its Q output changes from L to H level, and is reset by the rise of the reset input R from L to H level in the set state, and its Q output changes from L to H level. R- where the output goes from H to L level
It consists of an S flip-flop 11a, whose set input S is connected to the output of the above-mentioned AND circuit 10a, and whose reset input R is connected to the above-mentioned unlock switch 5 and a resistor linked to a lock knob connected in series between the + power supply and ground. The connection point with R ₄ is connected. The unlock switch 5 is open when the lock knob is in the unlocked state and closed when it is in the locked state, and changes from closed to open when the actuator 14 drives the locked knob to the unlocked state.

As described above, when the keyless lock operation is performed without the key being removed and the door is closed, and in response, the output of the AND circuit 10a rises from L to H level, the R-S flip-flop 11a is activated. is set, and its Q output rises from L to H level. This state is maintained until the reset input R rises from the L level to the H level and the flip-flop 11a is reset.

The second discrimination circuit 12 consists of an AND circuit 12a, one input of which is a flip-flop 11a.
The Q output of the handle switch 3 is input to the other input.
and the connection points with resistor _R3 are connected respectively.
As described above, when the door is closed, the flip-flop 11a is set and its output changes from the L level to the H level, but at this time, the handle is still pulled and the handle switch 3 is in the closed state, so the The output of the circuit 12a is at L level. However, when the keyless lock operation is completed and the hand is released from the steering wheel, the handle switch 3 is opened and both inputs of the AND circuit 12a become H level, so the AND circuit 12a
The output rises from L to H level.

The drive circuit 13 has an NPN transistor 13a whose base is connected to the output of the AND circuit 12a,
The emitter of the transistor 13a is connected to the ground, and the collector is connected to the + power source via the coil of the relay 13b. A contact point of a relay 13b constituting a normally open switch connects the other end of a solenoid 14a constituting an unlock actuator 14, one end of which is grounded, to the + power source. A buzzer 15 is connected in parallel to the coil of the relay 13b. As described above, when the output of the AND circuit 12a rises from L to H level, the transistor 13a is turned on, current flows through the coil of the relay 13b and the buzzer 15, and the contacts of the relay 13b are closed. Unlock solenoid 1 which is the unlock actuator
4a is activated, and the buzzer 15 generates a warning sound. The unlock solenoid 14a drives the lock knob to the unlocked state by its operation,
Doors that were once locked when you forgot to remove the key will now unlock.

In the above-described embodiments, the device is configured only by hardware, but the functions of the discrimination circuit and the storage circuit may be performed by a microcomputer that operates according to a predetermined program. .

〔Effect of the invention〕

As described above, in the case where a keyless lock operation is performed while forgetting to remove the key, when the door is in the locked state, the logical product of the key inserted state, the handle pulled state, and the door closed state is established. By focusing on the This prevents keyless locking even when the key is inserted, and the unlock actuator is activated only after the hand is released from the handle, so it can be applied without making any changes to the current state of the door lock device. I can do it.

Further, when the door lock knob is in the unlocked state, even if the door is closed by pulling the handle with the key inserted, the unlock actuator will not be operated in vain and no extra noise will be generated.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing the configuration of a device according to the present invention, FIG. 2 is an electric circuit diagram showing an example of a specific configuration in the block in FIG. 1, and FIG. 3 is an electric circuit diagram showing an example of a conventional device. It is a circuit diagram. 1... key switch (first detection means), 2...
...Door switch (second detection means), 3...Handle switch (third detection means), 5...Unlock switch (fourth detection means), 10...First
judgment circuit (first judgment means), 11... memory circuit (memory means), 12... second judgment circuit (second judgment means),
(judgment means), 13...drive circuit, 14...unlock actuator.

Claims (1)

[Claims] 1. Keyless locking is achieved when the door is closed with the inside lock knob in the lock position and the outside handle of the vehicle door is pulled, and the inside lock knob is locked when the outside handle is pulled. In a door lock device having a keyless lock mechanism that can be operated from an unlocked position to a locked position and cannot be operated from a locked position to an unlocked position, a detection means; a second detection means for detecting that the door has been closed; a third detection means for detecting that the outside handle of the door has been pulled; and detection results by the first to third detection means. a first discriminating means that takes the logical product of the first discriminating means; a memory means that stores the judgment result of the first discriminating means; and a first discriminating means that outputs the stored contents of the memory means when the third detecting means no longer detects the results. an unlock actuator for driving the inside lock knob in the unlocking direction based on the output of the second determining means; and a fourth detecting means for detecting that the inside lock knob is in the unlocked state. and means for prohibiting driving of the unlock actuator when unlocking of the inside lock knob is detected by the fourth detecting means. A device for preventing forgetting to remove a key.