JP4468745B2 - Door lock system - Google Patents

Description

  The present invention relates to a door lock system for locking and unlocking a back door of a vehicle. More particularly, the present invention relates to a door lock system that includes a latch mechanism portion that restrains a back door of a vehicle in a closed state, and the restraint state is released by driving an unlatching motor.

  There is a conventionally known door lock system that locks and unlocks the back door and side door in conjunction with the locking and unlocking of the driver seat door under certain conditions when the driver door is unlocked and unlocked. It has been. In this type of door lock system, each door is provided with a latch mechanism portion for restraining each door to a closed state and an unlatching motor for releasing the restrained state by the latch mechanism portion. And the unlatch motor provided in the latch mechanism part of each door is connected to a common door lock control means (ECU), and the drive control by the door lock control means is made.

Each door is provided with an opening handle, and when the opening operation is performed by the opening handle, a signal indicating this is sent to the door lock control means. When the door lock control means receives this opening signal at the time of unlocking, it drives the unlatching motor to release the door restraint state by the latch mechanism (for example, see Patent Document 1).
JP 2001-31339 A (FIGS. 1 and 5)

  In the door lock system, a harness (wire harness) for sending a drive signal from the door lock control means to the unlatching motor, or a harness for sending a signal indicating an opening operation by the door opening handle to the door lock control means, Wiring is provided between the lock control means and the back door.

  Therefore, in the case of a back door, since the distance between the back door and the door lock control means is large, each harness becomes long. For this reason, there is a problem that the amount of harness used for the lock control of the back door increases, and the cost of the door lock system increases.

  The present invention has been made in view of the above problems, and an object thereof is to realize a door lock system capable of reducing the amount of harness used and reducing the cost.

The invention according to claim 1, which solves the above problem, is a latch mechanism portion for restraining the back door of the vehicle in a closed state, and the restrained state is released by driving of an unlatching motor. A first control means having a switch for detecting an opening operation of a door opening handle of the back door and controlling energization to the unlatching motor, and connected to the first control means via a harness, When the back door is unlocked, power is supplied to the first control means via the harness. Conversely, when the back door is locked, go to the first control means. comprising of a second control means for stopping the power supply, wherein the first control means, opening operation of the door opening handle when receiving the power supply from said second control means through the harness The switch If you detected by supplies drive current to the unlatching motor, it is characterized in that is configured to release the restraining state of the back door.

  According to a second aspect of the present invention, in the first aspect of the invention, the second control means may be configured such that when the driver's door is unlocked when the vehicle is stopped, the first control unit is connected via the harness. Power is supplied to the control means, and conversely, when the driver's seat door is locked when the vehicle is stopped, the power supply to the first control means is stopped.

The invention according to claim 3, in the invention of claim 1 or 2, wherein said first control means is arranged on the latching mechanism, when the switch is once detects the opening operation of the open handle, back The drive current is supplied to the unlatching motor for a time sufficient to release the restrained state of the door.

  According to the first to third aspects of the present invention, the first control means for controlling energization to the unlatching motor when the opening handle of the back door is opened, and the first control means via the harness. The second control means for supplying power to the door constitutes a door lock control means. Therefore, the first control means can be arranged in the latch mechanism portion of the back door. For this reason, the usage-amount of the harness used for the lock control of a back door can be reduced, and the cost of a door lock system can be reduced.

  In addition, according to the invention described in claim 2, when the locking and unlocking of the driver's seat door is performed when the vehicle is stopped, a door lock system in which the back door is locked and unlocked in conjunction with this can be realized. The operability of the back door is improved.

  According to the third aspect of the present invention, once the opening handle is opened, even if the operation is performed for a short time, the unlatched motor is released from the back door restrained state. The drive current is reliably supplied for a sufficient time.

  Hereinafter, the best mode for carrying out the present invention will be described with reference to FIGS. As shown in FIGS. 3 and 4, a vehicle such as an automobile to which the present embodiment is applied has a back door 10 at the rear portion of the vehicle body 1, and the back door 10 is opened from the outside of the vehicle. An opening handle 11 is provided. The back door 10 shown here opens rearward around the hinge 12 at the upper part of the panel as shown by a two-dot chain line in FIG. 4, and is fixed to the door receiving part of the vehicle body 1 at the lower part of the panel. A latch mechanism portion 20 is provided so as to be able to engage with and disengage from the striker 14.

  The latch mechanism portion 20 restrains the back door 10 to the closed state, and the restrained state can be released by driving the unlatching motor. As shown in FIGS. 4 and 5, the striker 14 is generally a round bar bent into a substantially U shape, and both ends are fixed to the vehicle body 1 side.

  An entrance groove 21a for the striker 14 is formed in the base plate 21 of the latch mechanism 20 by a notch. In the vicinity of the striker entry groove 21a, as shown in FIG. 5, there are a hook 22 and a ratchet 23 for restricting the rotation of the hook 22 in the unlocking direction so as to face each other with the striker entry groove 21a interposed therebetween. The shafts 22a and 23a are rotatably supported. Further, the hook 22 and the ratchet 23 are urged in a direction in which the hook 22 and the ratchet 23 are pressed against each other by torsion springs 22d and 23d having one end locked to the base plate 21 side and the other end locked to the hook 22 and the ratchet 23, respectively. Yes.

  For this reason, when the striker 14 enters the striker entry groove 21a, the hook 22 receives the striker 14 in the gripping groove 22b and rotates around the shaft 22a. The ratchet 23 has a claw portion 23b that engages with the locking surface 22c of the rotated hook 22, and the hook 22 is brought into the locked position by engaging the claw portion 23b with the locking surface 22c. Retained.

  An intermediate lever 24 is pivotally attached to the base plate 21 by a shaft 24a. One arm 24 b of the intermediate lever 24 is engaged with the ratchet 23. A pin 24 d is implanted in the other arm 24 c of the intermediate lever 24, and this pin 24 d is engaged with the actuator arm 31 of the actuator 30. The intermediate lever 24 is urged to rotate in a direction in which the arm 24b is separated from the ratchet 23 by a torsion spring 24f, and the rotation range is restricted by a stopper 24g.

  In a state where the hook 22 is gripping the striker 14 (a state where the claw portion 23b of the ratchet 23 is engaged with the engaging surface 22c of the hook 22), the intermediate lever 24 is resisted against the urging force of the torsion spring 24f. When the ratchet 23 is rotated clockwise in FIG. 5, the ratchet 23 is rotated counterclockwise, and the engagement between the claw portion 23b and the locking surface 22c is released. As a result, the hook 22 rotates in a direction to release the striker 14 by the urging force of the torsion spring 22d, and the restrained state of the back door 10 is released.

  An actuator 30 is attached to the base plate 21 as a drive source for the latch mechanism 20. The actuator arm 31 of the actuator 30 pushes the pin 24d of the intermediate lever 24 against the biasing force of the torsion spring 24f, and rotates the intermediate lever 24 in the clockwise direction in FIG. Arranged outside.

  On the other hand, as shown in FIG. 6, an unlatching motor 33, a gear 34 fixed to the output shaft of the unlatching motor 33, and a sector gear 35 meshing with the gear 34 are provided in the housing 32. The sector gear 35 is provided with a shaft 35a that rotates integrally therewith. The shaft 35a is rotatably supported by the housing 32 or the like. An actuator arm 31 is fixed to an end portion of the shaft 35 a protruding from the housing 32, and the actuator arm 31 rotates together with the sector gear 35.

  The unlatching motor 33 is a direct current motor, and by the rotation of the unlatching motor 33, the sector gear 35 and the actuator arm 31 rotate counterclockwise in FIGS. The sector gear 35 is provided with a torsion spring 35b that urges the sector gear 35 (actuator arm 31) to rotate clockwise in FIGS. For this reason, when energization to the unlatching motor 33 is stopped, the unlatching motor 33 rotates in the direction opposite to that during energization by the urging force of the torsion spring 35b (and the urging force of the torsion spring 24f).

  As a result of the reverse rotation, the sector gear 35 and the actuator arm 31 return to the positions (initial positions) shown in FIGS. Naturally, the spring constants of the torsion spring 35b and the torsion spring 24f are set so that the reverse rotation is possible.

  Further, as shown in FIG. 6, an open lever 37 is pivotally mounted in the housing 32 with a shaft 37a. One end of the open lever 37 is connected to the opening handle 11 by a cable (or rod) 38. When the opening handle 11 is opened, the open lever 37 rotates counterclockwise in FIG. The switch SW of the control means 40 is closed.

  The first control means 40 disposed in the latch mechanism 20 detects that the opening operation of the door opening handle 11 has been performed once the switch SW is closed, and the restrained state of the back door 10 is released. The drive current is supplied to the unlatching motor 33 for a sufficient time.

  As shown in FIG. 1, the first control means 40 is connected to the second control means 60 via a harness 50. The second control unit 60 supplies power to the first control unit 40 via the harness 50 when the back door 10 is unlocked, and conversely, the back door 10 is locked. In this case, the power supply to the first control means 40 is stopped.

  In the present embodiment, the second control means 60 includes a driver door lock / unlock signal, a door lock / unlock signal from the remote controller, a vehicle state (whether the vehicle is in a running state or in a stopped state, etc. ) Indicating a vehicle speed signal or the like is input. The second control means 60 is constantly supplied with power from the battery 70.

  The second control means 60 determines that the back door 10 needs to be unlocked when the driver's door is unlocked when the vehicle is stopped. Power is supplied to the control means 40. Conversely, when the driver's door is locked when the vehicle is stopped, it is determined that the back door 10 needs to be locked, and the first control means 40 is reached. Stop the power supply. The second control means 60 uses a lock / unlock signal, which is an output of a sensor (switch) provided on the driver's seat door, or a door lock / unlock signal by a remote controller to lock / unlock the driver's seat door. I can know. The second control means 60 also stops the supply of power to the first control means 40 when the vehicle moves to a running state (when the vehicle speed exceeds a certain speed).

  The second control means 60 controls the locking / unlocking of the side doors other than the driver's seat (passenger seat door, rear seat right door, rear seat left door), and the back door 10 is locked. In accordance with / unlocking, the actuators of these side doors are driven to lock / unlock each door.

  FIG. 2 is a circuit diagram showing a specific configuration example of the first control unit 40 that receives power supply from the second control unit 60. In FIG. 2, parts corresponding to those in FIG. 1 and FIG. In FIG. 2, the switch SW having one end connected to the harness 50 is turned on / off by the door opening handle 11 as described above, and is closed when the door opening handle 11 is opened. The other end of the switch SW is grounded via a capacitor C1, and is connected to the base of the transistor T1 via a resistor R1.

  The connector of the transistor T1 is connected to one end (harness 50) of the switch SW via a relay RL (coil), and the connector of the transistor T2 is directly connected to one end (harness 50) of the switch SW. The emitter of the transistor T1 is grounded via a resistor R2, and is connected to the base of the transistor T2 via a capacitor C2 and a resistor R3.

  The relay RL has a self-resetting contact, and this contact is connected between the common terminal c and the terminal b only when a current flows through the relay RL (coil), and the relay RL (coil). When no current is flowing through, the connection is made between the common terminal c and the terminal a. Here, the terminal a is grounded and the terminal b is in a floating state. On the other hand, the common terminal c is connected to a connection point between the capacitor C2 and the resistor R3. The unlatching motor 33 is connected to the emitter of the transistor T2, and is configured to receive a drive current from there.

  In the first control means 40 configured as described above, when power is supplied from the second control means 60 and a battery voltage is applied to one end of the switch SW, the first control means 40 shifts to a standby state, and the back door 10 is unlocked. In this unlocked state, the opening handle 11 is opened, the open lever 37 rotates counterclockwise in FIG. 6, and the switch SW is closed. As a result, a voltage is applied to the base of the transistor T1 via the resistor R1, the transistor T1 is turned on, and the capacitor C1 is charged.

  When the transistor T1 is turned on, a current flows through the relay RL (coil), its contact is connected to the terminal b side, and a charging current to the capacitor C2 flows as a base current into the transistor T2 via the resistor R3. Turn on. Therefore, a drive current is supplied to the unlatching motor 33, and the unlatching motor 33 starts to rotate.

  When the opening operation of the door handle 11 continues and the charging of the capacitor C2 is completed, the base current is not supplied to the transistor T2, and the transistor T2 is turned off. Therefore, the unlatching motor 33 is rotated only for the time TM when the transistor T2 is turned on. This time TM is a time necessary and sufficient for releasing the restraint state of the back door 10 (restraint releasing). Time TN) or slightly longer (TM ≧ TN). The reason for this is to avoid the unlatching motor 33 being overloaded for a long time. With the above operation, the back door 10 is released from the restrained state, and the back door 10 can be opened.

  Even when the opening operation of the door opening handle 11 is completed in a short time and the switch SW is opened in a short time, the transistor T1 remains on for a while due to the charging voltage to the capacitor C1. For this reason, the transistor T2 is on until the charging of the capacitor C2 is completed, and the restrained state of the back door 10 can be released.

  When the opening operation of the door opening handle 11 is completed and the transistor T1 is turned off, no current flows through the relay RL (coil), the contact is connected to the terminal a side, and the charge accumulated in the capacitor C2 is resistance R2. The first control means 40 returns to the initial state.

  Thereafter, the back door 10 is closed, and when the power supply from the second control means 60 to the first control means 40 is stopped in a state where the back door 10 is closed, the back door 10 is locked. . In this locked state, even if the opening handle 11 is opened, the transistors T1 and T2 cannot be turned on, and the unlatching motor 33 does not rotate. Therefore, the back door 10 cannot be opened.

  According to the above embodiment, the first control means 40 that controls the energization of the unlatching motor 33 when the opening handle 11 of the back door 10 is opened, and the first control means via the harness 50. The second control means 60 that supplies power to 40 constitutes a door lock control means. Therefore, the first control means 40 can be disposed in the latch mechanism portion 20 of the back door 10. For this reason, the usage-amount of the harness 50 used for lock control of the back door 10 can be reduced, and the cost of a door lock system can be reduced.

  Furthermore, in this embodiment, when the driver's seat door is locked and unlocked when the vehicle is stopped, a door lock system in which the back door 10 is locked and unlocked in conjunction with this can be realized. Improves. Further, once the opening handle 11 is opened, even if the operation is performed for a short time, the unlatching motor 33 has a drive current for a time sufficient to release the restrained state of the back door 10. Is reliably supplied.

  In addition, this invention is not limited to the said embodiment, A various deformation | transformation is possible. For example, the first control unit 40 need not be limited to the circuit of FIG. 2. For example, when the door opening handle 11 is once opened, a timer is used to drive the unlatching motor 33 for a certain period of time. You may comprise so that it may supply.

  Further, in the above embodiment, the configuration is such that when the driver's door is locked and unlocked when the vehicle is stopped, the back door 10 is locked and unlocked in conjunction with this, but it is configured not to be interlocked. May be.

It is a block diagram which shows the example of embodiment of this invention. It is a circuit diagram which shows the specific structural example of a 1st control means. FIG. 2 is a rear perspective view of a vehicle to which the embodiment of FIG. 1 is applied. It is an internal block diagram of the back door part in FIG. It is a block diagram of a latch mechanism part. FIG. 6 is a detailed view of the actuator in FIG. 5.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1: Vehicle main body 10: Back door 11: Door opening handle 14: Striker 20: Latch mechanism part 22: Hook 23: Ratchet 30: Actuator 33: Unlatch motor 37: Open lever 40: First control means 50: Harness 60 : Second control means 70: battery

Claims (3)

A latch mechanism that restrains the back door of the vehicle in a closed state, the latch mechanism configured to be released by driving the unlatching motor; and
A first control unit having a switch for detecting an opening operation of a door opening handle of the back door and controlling energization to the unlatch motor;
When the back door is unlocked by being connected to the first control means via the harness, power is supplied to the first control means via the harness and, conversely, the back door is locked. A second control means for stopping the power supply to the first control means;
Equipped with a,
Said first control means, if you detected by the switch opening operation of the door opening handle when receiving the power supply from said second control means through the harness, drive current to the unlatching motor A door lock system configured to supply and release the restraint state of the back door.   The second control means supplies power to the first control means via the harness when the driver's door is unlocked when the vehicle is stopped, and conversely, the driver's door is locked. The door lock system according to claim 1, wherein when the vehicle is stopped, the power supply to the first control means is stopped. Said first control means, wherein disposed in the latch mechanism, when the switch is once detects the opening operation of the open handle, sufficient time for the constrained state of the back door is released, the unlatching motor The door lock system according to claim 1, wherein a driving current is supplied to the door.

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