JP2012228928A - Vehicular lock device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vehicular lock device including a control part capable of causing a key cylinder lock mechanism to perform lock operation as quickly as possible according to a key rotating operation.SOLUTION: This vehicular lock device includes a key cylinder lock mechanism 12 for blocking rotation of an ignition key up to a LOCK position at a position other than a parking position of a shift lever; and a control part 200 for controlling the key cylinder lock mechanism 12 by determining an IG/SW switch signal by the rotation of the ignition key. In the vehicular lock device, the control part 200 is configured to return to a start mode in response to the IG/SW switch signal input in a standby state, successively set a predetermined ACC interim signal of an ACC position signal of the ignition key, begin the start based on the ACC interim signal to read the IG/SW switch signal and move to output control operation when the switch signal corresponds to the ACC position of the ignition key.

Description

  The present invention relates to a vehicular lock device including a control unit that controls a key cylinder lock mechanism as soon as possible without being affected by chattering of an ignition switch.

  By operating the shift lever to the parking position, the key cylinder is unlocked and the ignition key is moved from a position other than the LOCK position, for example, from the ACC position (accessory position) or ON position (driving position) to the LOCK position ( The ignition key can be rotated to the position where the ignition key can be removed), the ignition key can be pulled out, and the rotation from the ACC position to the LOCK position is not allowed during operation. A key cylinder lock mechanism is known that prevents it from coming off.

  Such a key cylinder lock mechanism is controlled by a control unit, and receives a switch signal of an ignition switch by turning of an ignition key inserted into the key cylinder by the control unit, and locks or unlocks the vehicle to lock the vehicle. The device is equipped.

FIG. 5 shows a conventional example of the vehicle locking device 11.
The invention of the vehicle locking device is an invention filed by the present applicant as Japanese Patent Application No. 2010-128672.
The lock device 11 is provided with a key cylinder lock mechanism 12.
The key cylinder lock mechanism 12 includes a key lock solenoid 13, a pulse output circuit 14, and a voltage detection circuit 15, and is connected via an IG / SW (ignition switch) 16 and an ACC / SW (accessory switch) 17. The power supply is operated by the on-vehicle battery 18.

  The key lock solenoid 13 regulates the rotation of the key cylinder to a position where the ignition key can be pulled out. The key lock solenoid 13 is a pulse output circuit 14 that is powered by the battery 18 via the IG / SW 16 or ACC / SW 17 and operates. Power is supplied with the output pulse.

Specifically, since the voltage detection circuit 15 detects the power supply voltage of the battery 18 and inputs the detected voltage signal to the control unit (microcomputer) 100, the control unit 100 has a duty corresponding to the power supply voltage of the battery 18. A ratio control signal is sent to the pulse output circuit 14 via the circuit line 19, and the pulse output circuit 14 outputs a pulse having a duty ratio corresponding to the voltage fluctuation of the battery 18 to supply power to the key lock solenoid 13.
Therefore, the key lock solenoid 13 is fed with a constant pulse average voltage regardless of voltage fluctuations using the battery 18 as a power source.

In addition, the shift lock solenoid 21 fed by the shift lock output circuit 20 is unlocked by depressing the brake pedal when the shift lever is in the parking position, and the shift lever can be moved to a position other than the parking position. This is a solenoid provided in the shift lock mechanism.
In addition, 22 is a brake pedal switch, 23 is a parking detection switch (parking position detection switch 23a, non-parking position detection switch 23b), and 24-28 are input circuits for causing the control unit 100 to input operation signals of the switches. .

Further, the control unit 100 is powered by the battery 18 via the battery input circuit 29 and the constant voltage circuit 30.
The constant voltage circuit 30 is provided with a current capacity switching circuit 31.
In addition, the control unit 100 includes a write connector 32, a reset circuit 33, a model determination circuit 34, and the like.

  In the above-described vehicle locking device 11, when the shift lever is operated to the parking position, the detection signal of the parking position detection switch 23a is input to the control unit 100, and the control unit 100 that has recognized this detection signal outputs a power supply stop signal. This is sent to the pulse output circuit 14.

Therefore, since the pulse output circuit 14 stops the pulse output and the key lock solenoid 13 becomes non-powered, the plunger is retracted by the spring force from the restriction groove of the key cylinder, and is switched from the locked state to the unlocked state.
As a result, the key cylinder can be rotated to the key pullable position (LOCK position), and in this state, the ignition key can be pulled out.

Further, after the ignition key inserted into the key cylinder is rotated from the LOCK position and then the shift lever is moved to a position other than the parking position, the detection signal of the detection switch 23b other than the parking position is input to the control unit 100.
Therefore, the control unit 100 responds to the input of the detection signal and sends a duty ratio control signal to the pulse output circuit 14 via the circuit line 19 so that the pulse output circuit 14 outputs an output pulse.

As a result, the key lock solenoid 13 is supplied with power, and the plunger protrudes toward the restriction groove of the key cylinder due to the excitation of the solenoid 13, so that the key cylinder is prevented from rotating to the LOCK position, and the ignition key is locked. Pulling out becomes impossible.
That is, if the ignition key is prevented from being pulled out during driving of the vehicle, the vehicle is stopped, the shift lever is moved to the parking position, and then the key cylinder is rotated to the LOCK position by the ignition key, the ignition key is Can be pulled out.

Patent application for Japanese Patent Application No. 2010-128672

The control unit 100 of the vehicle locking device 11 described above has to provide unnecessary time before shifting to load control.
That is, there is a problem that even if the ignition key is rotated to a position other than the LOCK position, the lock operation of the key cylinder lock mechanism 12 is delayed because the control unit 100 does not immediately control the load.

This problem will be described in detail with reference to the operation explanatory diagram of FIG. 6 and the flowchart shown in FIG.
As can be seen from FIGS. 6A, 6B, and 6C, when the ignition key inserted in the key cylinder is rotated from the LOCK position to the ACC position, the switch signal input through the IG / SW 16 including chattering is obtained. The control unit 100 is input to the control unit 100, and the control unit 100 which has been in the standby mode (a) moves to the standby mode return step (b) and is initialized. (Refer to ST701 to ST703 in FIG. 7)

After that, the control unit 100 sets the LOCK temporary signal corresponding to the LOCK position signal in advance as a signal indicating the position of the ignition key, that is, set to the safe side, regardless of whether the ignition key is rotated to the ACC position. Then, the process proceeds to the above-described LOCK provisional signal setting step (c), and based on the setting of the LOCK provisional signal (corresponding to the LOCK position signal), the process proceeds to the input signal stabilization waiting step (d).
During this input signal stabilization waiting timer time, it waits for the disappearance of chattering included in the switch signal of the IG / SW 16. (Refer to ST705 to ST706 in FIG. 7)

  After the time of the input signal stabilization waiting step (d) has elapsed, an input state reading step (e) for reading state signals of current operations of peripheral devices such as the IG / SW 16, ACC / SW 17, brake pedal switch 22, and parking detection switch 23 Move on. (Refer to ST707 in FIG. 7)

Further, the control unit 100 includes determination means, and in this input state reading step (e), the chattering state is determined from the read switch signal of the IG / SW 16.
For example, the switch signal of the read IG / SW 16 is sampled, and when the signal level of the sampling pulse is in a state of continuously detecting the high level for a predetermined number of times (for example, 5 times), it is detected that it is the ACC position signal level, and chattering It is determined that there is no occurrence.
Then, the control unit 100 detects the LOCK corresponding to the LOCK position signal in the signal setting step (c).
Although the provisional signal is set, in this case, the setting is changed to the setting of the ACC position signal. (Refer to ST708 and ST710 in FIG. 7)

Further, when the signal level of the sampling pulse is in a state where the Low level is continuously detected a predetermined number of times (for example, 5 times), it is detected that the level is the LOCK position signal level, and it is determined that there is no influence of chattering.
And since the control part 100 has set the LOCK temporary signal corresponding to the LOCK position signal in the signal setting step (c), in this case, the setting is continued to the LOCK position signal. (Refer to ST708 to ST709 in FIG. 7)

As described above, the control unit 100 proceeds to the output control step (f) with the ACC position signal or the LOCK position signal recognized.
That is, when the control unit 100 recognizes the ACC position signal and the shift lever is operated to a position other than parking, the key cylinder lock mechanism 12 is locked. (Refer to ST711 to ST712 in FIG. 7)
Specifically, in the output control step (f), the pulse output circuit 14 outputs an output pulse in accordance with the duty ratio control signal sent from the control unit 100.
Therefore, the key cylinder is locked by the power supply of the key lock solenoid 13, and the rotation of the ignition key to the LOCK position is prevented.

Further, when movement of the shift lever to the parking position is detected while the control unit 100 recognizes the ACC position signal, the key cylinder lock mechanism 12 is unlocked.
Therefore, when the ignition key is rotated to the LOCK position, the sampling signal level of the LOCK position signal becomes, for example, a low level continuously for seven times or more, so that the rotation of the ignition key to the LOCK position is confirmed. Return to standby mode. (Refer to ST712 to ST714 in FIG. 7)

Specifically, when the control unit 100 is in the output control mode (f), if the shift lever is returned to the parking position, the pulse output circuit 14 stops the pulse output by the stop control signal sent from the control unit 100. Therefore, the key lock solenoid 13 is unpowered, and the key cylinder is unlocked.
Therefore, the ignition key can be turned to the LOCK position, and the ignition key can be turned to the LOCK position.
In the LOCK position, the ignition key can be removed from the key cylinder

As described above, when the ignition key is rotated from the LOCK position to the ACC position, the control unit 100 includes an input signal stabilization waiting step (d ) Must be provided.
The control unit 100 recognizes the LOCK provisional signal corresponding to the LOCK position during the input signal stabilization waiting step (d) and until the ACC position of the ignition key is read in the input initial state reading step (e). The pulse output of the pulse output circuit 14 is stopped and the key lock solenoid 13 is not powered.

That is, since the key cylinder is not locked until the ACC position of the ignition key is read in the input state reading step (e), the ignition key can be turned back from the ACC position to the LOCK position and rotated. Become.
As a result, immediately after the ignition key is rotated from the LOCK position to the ACC position, the shift lever is moved from the parking position to another position, and when the operation of returning the ignition key to the LOCK position is performed, If the engine is started by operating the ignition key, the vehicle will start immediately, which is extremely dangerous.

  Therefore, in the present invention, in view of the above-described problems, when the ignition key is operated to the ACC position, the control unit 100 sets the ACC provisional signal corresponding to the ACC signal regardless of the state of the IG / SW 16 and The main object of the present invention is to propose a vehicle locking device in which the key cylinder lock mechanism is immediately operated immediately after the ACC position operation to prevent the ignition key from returning to the LOCK position.

  In order to achieve the above object, as a first invention in the present invention, a key cylinder lock mechanism that locks the key cylinder at a position other than the parking position of the shift lever and prevents the ignition key from rotating to the LOCK position; A control unit that controls the key cylinder lock mechanism by determining the rotation position of the ignition key from the switch signal of the ignition switch by the rotation of the ignition key, and has at least the key cylinder lock mechanism and the control unit In the locking device for a vehicle, the control unit returns to the start mode in response to the switch signal of the ignition switch input in the standby state, and then the ACC of the ACC position signal (accessory position signal) of the predetermined ignition key. Set a provisional signal and immediately start And reads the switch signal of an ignition switch, it proposes a vehicle locking apparatus which is characterized in that a structure to shift the output control operation.

  According to a second aspect of the invention, in the vehicle locking device according to the first aspect of the invention, the control unit performs processing without waiting for stabilization of the signal even when chattering occurs in the switch signal of the ignition switch. A vehicle locking device characterized by the above is proposed.

According to the vehicle locking device of the first aspect of the present invention, when the ignition key is rotated from the LOCK position to the ACC position, the key cylinder lock mechanism is immediately activated regardless of the input of the switch signal of the ignition switch including chattering. In order to control the operation, when the ignition key is rotated to the ACC position, the rotation of the cylinder to the LOCK position is prevented at substantially the same time.
For this reason, unless the shift lever is moved to the parking position, the ignition key cannot be returned to the LOCK position and cannot be turned. Therefore, there is no danger that the vehicle will inadvertently start even if the engine is started thereafter.

  When the ignition key is rotated from the LOCK position to the ACC position, the control unit immediately shifts to the input reading control. Therefore, the vehicle locking device according to the second aspect of the present invention reads the switch signal of the ignition switch including chattering. Chattering is determined, and the control unit proceeds to the subsequent operation according to the determination result.

It is a block diagram which shows the partial structural example of the locking device for vehicles provided with a key cylinder locking mechanism. It is operation | movement explanatory drawing of the control part with which an above-described vehicle locking device is provided. It is a flowchart which shows operation | movement of the said control part which starts operation | movement by the input of the switch signal of IG * SW. It is operation | movement explanatory drawing of the said control part when a noise signal is input. It is a block diagram which shows the structural example of the conventional vehicle locking device provided with a key cylinder lock mechanism. It is operation | movement explanatory drawing of the control part with which the conventional vehicle locking device is provided. It is a flowchart which shows operation | movement of the control part with which the conventional vehicle locking device is provided.

Next, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a block diagram showing a partial configuration example of a vehicle locking device shown as an embodiment. The vehicle locking device of this embodiment is characterized by a control unit 200, and other configurations are as follows. Since it is the same as the conventional vehicle locking device shown in FIG. 5, the same parts and components are denoted by the same reference numerals and description thereof is omitted.

  The control unit 200 provided in the vehicle locking device according to the present embodiment sets an ACC provisional signal corresponding to the ACC position signal of the ignition key regardless of the input of the switch signal of the IG / SW 16 including chattering. The input status reading process is performed according to the signal setting.

  In other words, after the chattering disappears, there is no input signal stabilization waiting step for reading the switch signal of the IG / SW 16, and the process proceeds based on the set ACC provisional signal (corresponding to the ACC position signal), and the ignition key is set to LOCK. When it is rotated to a position other than the position, the key cylinder locking mechanism 12 is operated as soon as possible to prevent the ignition key from returning to the LOCK position.

  With this configuration, when the ignition key is rotated to a position other than the LOCK position, the key cylinder lock mechanism 12 is not unlocked unless the shift lever is moved to the parking position, so that the ignition key can be returned to the LOCK position. Therefore, a dangerous problem such as inadvertent start of the vehicle due to re-operation of the ignition key returned to the LOCK position does not occur.

This will be described in more detail with reference to FIGS.
2 is an operation explanatory diagram of the control unit 200 shown in the same manner as FIG. 6, and FIG. 3 is a flowchart of the control unit 200 shown in the same manner as FIG.
As shown in FIGS. 2 (A), 2 (B), and 2 (C), the control unit 200 inputs the switch signal of the IG / SW 16 when the ignition key is rotated from the LOCK position to the ACC position, as in the conventional example. Then, the process proceeds from the standby mode (a) to the standby return step (b), and initialization processing is performed. (Refer to ST301 to ST303 in FIG. 3)

Subsequently, the control unit 200 proceeds to a signal setting step (c) for setting an ACC provisional signal corresponding to the ACC position signal of the ignition key regardless of the switch signal of the IG / SW 16. (Refer to ST304 in FIG. 3)
Here, a fixed ACC provisional signal (corresponding to an ACC position signal) is set regardless of whether or not chattering is included in the switch signal of the IG / SW 16.

  When the ACC provisional signal is set, the process proceeds to an input state reading step (e), and an input state for reading the operation signals of the current operation of peripheral devices such as the IG / SW 16, the ACC / SW 17, the brake pedal switch 22, and the parking detection switch 23. Move to reading step (e). (Refer to ST305 in FIG. 3)

Further, the control unit 200 includes determination means, and in this input state reading step (e), the chattering state is determined from the read switch signal of the IG / SW 16.
For example, the switch signal of the read IG / SW 16 is sampled, and when the signal level of the sampling pulse is in a state of continuously detecting the high level for a predetermined number of times (for example, 5 times), it is detected that it is the ACC position signal level, and chattering It is determined that there is no occurrence.
And since the control part 200 has set the ACC provisional signal equivalent to an ACC position signal in the signal setting step (c), the setting of the ACC position signal is continued without change. (See ST306 and ST308 in FIG. 3)

Further, when the signal level of the sampling pulse is in a state where the Low level is continuously detected a predetermined number of times (for example, 5 times), it is detected that the level is the LOCK position signal level, and it is determined that there is no influence of chattering.
The control unit 200 sets the ACC provisional signal corresponding to the ACC position signal in the signal setting step (c). In this case, the setting is changed to the LOCK position signal. (Refer to ST306 to ST307 in FIG. 3)

As described above, the control unit 200 proceeds to the output control step (f) in a state where the ACC position signal or the LOCK position signal is recognized.
That is, when the control unit 200 recognizes the ACC position signal and the shift lever is operated to a position other than parking, the key cylinder lock mechanism 12 is locked.
Specifically, the control unit 200 constantly monitors the shift lever moving position. For example, when the number of sampling pulses of the parking signal continuously exceeds a predetermined number, the parking position becomes the predetermined number or less. When it is, it is determined that it is in a position other than parking.

Therefore, when the control unit 200 recognizes the ACC position signal and detects a position other than parking, the key cylinder is locked by the key cylinder lock mechanism 12 and rotation of the ignition key from the ACC position to the LOCK position is prevented. (Refer to ST308 to ST310 in FIG. 3)
As a result, since the key cylinder does not rotate to the LOCK position, the ignition key does not come out of the key cylinder.

When the control unit 200 recognizes the ACC position signal and the shift of the parking position of the shift lever is detected, the key cylinder lock mechanism 12 is unlocked.
Therefore, when the ignition key is rotated to the LOCK position, the sampling signal level of the LOCK position signal becomes, for example, a low level continuously for seven times or more, so that the rotation of the ignition key to the LOCK position is confirmed. Return to standby mode. (Refer to ST310 to ST312 in FIG. 3)

On the other hand, the control unit 200 recognizes the LOCK position signal when it is an erroneous signal or when the ignition key is turned back to the LOCK position.
In the case of an error signal, the operation returns to the ACC position signal promptly, so that the same operation as described above is performed.
Further, when the ignition key is rotated back to the LOCK position, the key cylinder lock mechanism 12 remains inactive, and the low level of the sampling signal of the LOCK position signal is continuously detected seven times or more. Return to mode. (Refer to ST307 and ST309 to ST312 in FIG. 3)

  In addition, if the shift lever is moved to the parking position while the ACC position signal is recognized, the key cylinder lock mechanism 12 is unlocked as in the conventional example, so that the ignition key can be returned to the LOCK position and rotated. In addition, the ignition key can be pulled out from the cylinder. (Refer to ST310 to ST312 in FIG. 3)

FIG. 4 shows the operation of the control unit 200 when a noise signal is input instead of the switch signal of the IG / SW 16.
Also in this case, an ACC provisional signal corresponding to the ACC position signal is set, the process proceeds to the input state reading step (e), and the noise signal is determined by the determination means.

However, when the switch signal of the IG / SW 16 is a noise signal, even if the level of the sampling pulse signal read by the control unit 200 detects the High level once, the Low level of the sampling pulse signal is immediately continued five times thereafter. After the controller 200 recognizes the ACC position signal, the LOCK
Since the state returns to the recognition state of the position signal, the LOC position signal is continuously 7 times or more and the standby mode is restored.
As a result, the key cylinder lock mechanism 12 also remains inactive.

As described above, by rotating the ignition key from the LOCK position, the control unit 200 sets the ACC provisional signal corresponding to the ACC position signal of the ignition key, and moves to the input state reading operation and output control steps. Compared to the control unit 100 of the conventional example, the input signal stabilization waiting step (d) becomes unnecessary.
As a result, the operation time of the control unit 200 is shortened according to the waiting time of the input signal stabilization. As a result, the time from the ignition key operation until the key cylinder lock mechanism 12 is locked is shortened. The vehicle locking device can reliably prevent the key from rotating back.

  The present invention is suitable for a vehicle locking device having a control unit (microcomputer) of a key cylinder lock mechanism that prevents the key from dropping off during operation of the vehicle.

11 Vehicle Locking Device 12 Key Cylinder Locking Mechanism 13 Key Cylinder Lock Solenoid 14 Pulse Output Circuit 15 Voltage Detection Circuit 16 IG · SW
17 ACC / SW
22 Brake pedal switch 23 Parking detection switch 200 Control unit

Claims (2)

The key cylinder lock mechanism that locks the key cylinder at a position other than the parking position of the shift lever and prevents the ignition key from rotating to the LOCK position, and the ignition key switch signal from the ignition switch by the ignition key rotation, A vehicular locking device including at least the key cylinder locking mechanism and the control unit.
The control unit returns to the start mode in response to the switch signal of the ignition switch input in the standby state, and then starts the start immediately after setting the predetermined ACC temporary signal of the ACC position signal of the ignition key. The vehicle locking device is characterized in that it reads the ignition switch signal and shifts to an output control operation. The vehicle locking device according to claim 1,
The vehicle lock device according to claim 1, wherein the control unit is configured to perform processing without waiting for stabilization of the signal even when chattering occurs in the switch signal of the ignition switch.

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