Door lock system

Abstract

This prevents unintended inconsistencies in the state of the double-lock mechanism for each door. [Solution] The door lock system comprises a plurality of door lock devices provided on a plurality of doors of a vehicle, and a control device. Each of the plurality of door lock devices includes a latch mechanism, a lock mechanism, a double lock mechanism, a motor, and a detector. The double lock mechanism alternately switches between a double lock set state and a double lock unset state by driving the motor in one direction. When a switch to the double lock unset state is requested, the control device controls the motor of the door lock device whose double lock mechanism is detected by the detector as being in the double lock set state to drive in one direction, while not controlling the motor of the door lock device whose double lock mechanism is detected by the detector as being in the double lock unset state to drive in one direction.

Description

[Technical Field]

[0001] This specification discloses a door lock system. [Background Art]

[0002] Conventionally, door lock systems of this type have been proposed that include a double lock mechanism driven by a motor (see, for example, Patent Document 1). [Prior Art Documents] [Patent Documents]

[0003] [Patent Document 1] Japanese Unexamined Patent Application Publication No. 2000-45592 [Summary of the Invention] [Problem to be Solved by the Invention]

[0004] Consider a door lock system in which each of a plurality of doors of a vehicle is equipped with a door lock device including a double lock mechanism, and the double lock mechanism is configured to alternately switch between setting and releasing the double lock each time the motor is driven in one direction. In such a system, normally, when setting of the double lock is requested, the double lock is set for the door lock devices of all doors, and when release of the double lock is requested, the double lock is released for the door lock devices of all doors. However, in this system, there may occur cases where the double lock state does not match among individual doors. This can occur, for example, in a door lock system in which a door lock device mounted on a partial door of the vehicle (a driver's seat side door) has a function of emergency releasing the double lock by operation of a key cylinder, when an operator emergency releases the double lock of the partial door. In this case, even if the motors of the door lock devices of all doors are simultaneously driven in one direction in response to a normal double lock setting or release request, the double lock states cannot be matched between the partially door that has been emergency released and the other doors.

[0005] The primary purpose of this disclosure is to prevent unintended inconsistencies in the state of the double lock mechanism for each door in a door lock system in which a door lock device including a double lock mechanism is installed on multiple doors of a vehicle. [Means for solving the problem]

[0006] This disclosure employs the following means to achieve the primary objectives described above.

[0007] The first door lock system of this disclosure is a door lock system comprising: a plurality of door lock devices provided on a plurality of doors of a vehicle; and a control device for controlling the plurality of door lock devices, wherein the plurality of door lock devices include: a latch mechanism that selectively forms a latch state that holds a corresponding door in a closed state and an unlatch state that allows the corresponding door to be opened; a lock mechanism that selectively forms a lock state that prohibits the latch mechanism from switching to the unlatch state and an unlock state that allows the latch mechanism to switch to the unlatch state; and a double lock set state that prohibits the lock mechanism from switching to the unlock state and a double lock unset state that allows the lock mechanism to switch to the unlock state The gist of the invention is that it includes a double lock mechanism, a motor that drives the double lock mechanism, and a detector that detects the state of the double lock mechanism, wherein the double lock mechanism alternately switches between the double lock set state and the double lock unset state by driving the motor in one direction, and when a switch to the double lock unset state is requested, the control device drives the motor of the door lock device among the plurality of door lock devices in the one direction if the state of the double lock mechanism detected by the detector is the double lock set state, and does not drive the motor of the door lock device in the one direction if the state of the double lock mechanism detected by the detector is the double lock unset state.

[0008] In the first door lock system of this disclosure, even if a switch to the double lock unset state is required when the double lock state differs between some doors and others, the state of the double lock mechanism can be made consistent with the double lock unset state for all doors. As a result, unintended discrepancies in the state of the double lock mechanism for each door can be prevented.

[0009] A second door lock system of this disclosure comprises a plurality of door lock devices provided on a plurality of doors of a vehicle, and a control device for controlling the plurality of door lock devices, wherein the plurality of door lock devices include: a latch mechanism that selectively forms a latch state that holds a corresponding door closed and an unlatch state that allows the corresponding door to be opened; a lock mechanism that selectively forms a lock state that prohibits the latch mechanism from switching to the unlatch state and an unlock state that allows the latch mechanism to switch to the unlatch state; and a double lock set state that prohibits the lock mechanism from switching to the unlock state and a double lock unset state that allows the lock mechanism to switch to the unlock state. The gist of the invention is that the device includes a double lock mechanism formed in a door lock, a motor that drives the double lock mechanism, and a detector that detects the state of the double lock mechanism, wherein the double lock mechanism alternately switches between the double lock set state and the double lock unset state by driving the motor in one direction, and when a switch to the double lock set state is requested, the control device controls the motor of the door lock device among the plurality of door lock devices whose double lock mechanism is detected by the detector as being in the double lock unset state to drive in the one direction, and does not control the motor of the door lock device whose double lock mechanism is detected by the detector as being in the double lock set state to drive in the one direction.

[0010] In the second door lock system of this disclosure, even when a switch to the double lock set state is required when the double lock state differs between some doors and others, the state of the double lock mechanism can be made consistent with the double lock set state on all doors. As a result, unintended discrepancies in the state of the double lock mechanism on each door can be prevented. [Brief explanation of the drawing]

[0011] [Figure 1] This is a schematic diagram showing a vehicle equipped with the door lock system of this disclosure. [Figure 2] This is a schematic diagram of the door locking device when the door is unlocked. [Figure 3] This is a schematic diagram of the door locking device when the door is unlocked. [Figure 4] This is a schematic diagram of the door locking device when it is locked and double-locked and unset. [Figure 5] This is a schematic diagram of the door locking device when it is locked and double-locked and unset. [Figure 6] This is a schematic diagram of the door locking device when the double lock is set. [Figure 7] This is a schematic diagram of the door locking device when the double lock is set. [Figure 8] This is a schematic diagram of the door locking device when the inside door handle is operated from the unlocked state. [Figure 9] This is a schematic diagram of the door locking device when the inside door handle is operated from the unlocked state. [Figure 10] This is a schematic diagram of the door lock device when the knock-type cam mechanism is in operation. [Figure 11] This is a schematic diagram of the door lock device when the knock-type cam mechanism is in operation. [Figure 12] This is a schematic diagram of the door locking device when it is switched from a double-lock set state to an unlatched state by the drive of a motor. [Figure 13]It is a schematic configuration diagram of the door lock device when changing from the double lock set state to the unlatched state by driving of the motor. [Figure 14] It is a control block diagram of the door lock device. [Figure 15] It is a flowchart showing an example of a double lock locking control routine. [Figure 16] It is a flowchart showing an example of a double lock unlocking control routine. [Figure 17] It is a flowchart showing an example of a double lock unlocking control routine. [Figure 18] It is a control block diagram of a door lock device according to another embodiment. [Figure 19] It is a control block diagram of a door lock device according to another embodiment. [Figure 20] It is a control block diagram of a door lock device according to another embodiment.

Mode for Carrying Out the Invention

[0012] Next, modes for carrying out the present disclosure will be described with reference to the drawings.

[0013] Figure 1 is a schematic configuration diagram showing a vehicle equipped with the door lock system 10 of the present disclosure. Figures 2 and 3 are schematic configuration diagrams of the door lock device 10A in an unlocked state. Figures 4 and 5 are schematic configuration diagrams of the door lock device 10A in a locked state and a double lock unset state. Figures 6 and 7 are schematic configuration diagrams of the door lock device 10A in a double lock set state. Figures 8 and 9 are schematic configuration diagrams of the door lock device 10A when the inside door handle 6 is operated from the unlocked state. Figures 10 and 11 are schematic configuration diagrams of the door lock device 10A when the knock-type cam mechanism is in an activated state. Figures 12 and 13 are schematic configuration diagrams of the door lock device 10A when changing from the double lock set state to the unlatched state by driving of the second motor 71. Figure 14 is a control block diagram of the door lock device 10A.

[0014] As shown in Figure 1, in this embodiment, the vehicle is equipped with doors 1A, 1B, 1C, and 1D on the left and right sides of the driver's seat, passenger seat, and rear seats. Door 1A is the driver's side door (FrRH), door 1B is the passenger side door (FrLH), door 1C is the right rear seat door (RrRH), and door 1D is the left rear seat door (RrLH). Note that the vehicle does not have to have doors for the rear seats, and may have a tailgate.

[0015] Each door 1A, 1B, 1C, and 1D, as shown in Figure 1, includes a door body 2 that forms the lower half of the door and a door sash 3 that forms the upper half of the door and guides the window glass. The door body 2 includes an outer panel 4, an inner panel (not shown) fixed to the inside (passenger compartment side) of the outer panel 4, and a resin trim (not shown) fixed to the passenger compartment side surface of the inner panel. Doors 1A, 1B, 1C, and 1D are rotatable from a fully closed position through a half-open position (half-door position) to a fully open position, with their front ends rotatably supported by a vehicle body (not shown) as a pivot point. The half-open position is a position slightly closer to the open position than the fully closed position.

[0016] Each door 1A, 1B, 1C, and 1D includes an outside door handle 5 that is pullable or rotatably mounted to the outer panel 4, and an inside door handle 6 that is pullable or rotatably mounted to the trim. The outside door handle 5 and the inside door handle 6 are biased to their initial positions by springs or the like (not shown). The vehicle user can open the doors 1A, 1B, 1C, and 1D by manually operating the outside door handle 5 and the inside door handle 6 to move them from their initial positions to the open position. In addition, the outer panel 4 of the driver's side door 1A is equipped with a key cylinder 9 that can be manually operated by the user.

[0017] As shown in Figure 1, the door lock system 10 includes door lock devices 11A, 11B, 11C, and 11D installed on each door 1A, 1B, 1C, and 1D, and a control device 80 (see Figure 14) that controls the entire system.

[0018] As shown in Figure 1, each door lock device 11A, 11B, 11C, and 11D is positioned in an internal space defined by the outer panel 4 and an inner panel (not shown) of the corresponding door 1A, 1B, 1C, and 1D. More specifically, the door lock devices 11A, 11B, 11C, and 11D are fixed to the inner panel, for example, so as to be positioned below the outside door handle 5 within the internal space. The door lock devices 11A, 11B, 11C, and 11D are connected to the outside door handle 5 via a flexible cable (inner cable) 7 and an outer casing member (outer casing) 8, respectively. The cable 7 is inserted into the outer casing member 8, and the two transmit the movement of the outside door handle 5 from its initial position to the open position to the door lock devices 11A, 11B, 11C, and 11D.

[0019] The door lock device 11A located on the driver's side door 1A comprises a latch mechanism 20, a lock mechanism 40, a double lock mechanism 50, a first motor 61, a second motor 71, and a rotating member 73, as shown in Figures 2 to 13. The door lock devices 11B located on the passenger side door 1B and the door lock devices 11C and 11D located on the rear passenger doors 1C and 1D are the same as the door lock device 11A, except that emergency release of the double lock by operating the key cylinder 9, which will be described later, is not possible, so their description is omitted.

[0020] The latch mechanism 20 is configured to selectively form a full latch state, which holds the door 1A in the fully closed position; a half latch state, which holds the door 1A in a half-open position, slightly open from the fully closed position; and an unrat state, which allows the door 1A to be opened. The full latch state and the half latch state may be referred to as the latch state. The latch mechanism 20 comprises a base plate 21, a latch 22, a lift lever 23, a release lever 31, an open link 32, an outside open lever 34, an inside lever 35, and an inside open lever 36.

[0021] The latch 22 has a notch (not shown) that can engage with a striker (not shown) fixed to the vehicle body. The latch 22 is rotatably supported on the base plate 21 and can move by rotation to a fully latched position, a half-latched position, and an unlatched position. In the fully latched position, the striker of the vehicle body is held by the notch of the latch 22, thereby holding the door 1A in the fully closed position. In the half-latched position, the striker of the vehicle body is held by the notch of the latch 22, while the door 1A is held in the half-open position. In the unlatched position, the striker is released from the notch of the latch 22, allowing the door 1A to open.

[0022] The latch 22 is biased by a latch spring (not shown) in the direction of releasing the striker. The latch 22 is then held in the fully latched or half-latched position by a lift lever 23 which restricts its rotation in the direction of releasing the striker.

[0023] The lift lever 23 is rotatably supported on the base plate 21 and can be selectively moved between an initial position and an operating position by rotation. When the lift lever 23 is in the initial position, it restricts rotation in the direction that releases the striker of the latch 22. On the other hand, when the lift lever 23 is moved to the operating position, it releases the restriction on rotation in the direction that releases the striker of the latch 22. As a result, the latch 22 moves to the unlatched position by the latch spring and releases the striker, allowing the door 1A to be opened.

[0024] The release lever 31 is rotatably supported by a housing (not shown) of the door lock device 11A and is selectively movable between an initial position and an operating position by rotation. When the release lever 31 is in the initial position, it positions the lift lever 23 in the initial position. When the release lever 31 is moved to the operating position, it presses against the lift lever 23, moving the lift lever 23 to the operating position. The release lever 31 includes a rotating member engaging portion 311 and a lift lever engaging portion 312.

[0025] The open link 32 is rotatably supported relative to the outside open lever 34. Therefore, the open link 32 is rotatable relative to the outside open lever 34 and can move integrally with the outside open lever 34. By rotating relative to the outside open lever 34, the open link 32 can move between the unlocked position (see Figures 2 and 3) and the locked position (see Figures 4 and 5). Furthermore, in both the unlocked and locked positions, the open link 32 can move between the initial position and the operating position by moving together with the outside open lever 34.

[0026] The open link 32 includes a release lever engaging portion 321 and a spring engaging portion 322. When the open link 32 is in the unlocked position and is moved from the initial position to the operating position by the outside open lever 34, the release lever engaging portion 321 engages with the release lever 31 and presses the release lever 31, thereby moving the release lever 31 from the initial position to the operating position. As a result, the lift lever engaging portion 312 of the release lever 31 engages with the lift lever 23 and presses the lift lever 23, moving the lift lever 23 from the initial position to the operating position, thereby switching the latch mechanism 20 to the unlatched state. Furthermore, the open link 32 is configured so that the release lever engaging portion 321 does not engage (contact) with the release lever 31 even when the open link 32 is in the locked position and is moved from the initial position to the operating position. Therefore, when the open link 32 is in the locked position, the latch mechanism 20 cannot be switched to the unlatched state. The spring engagement portion 322 is a projection that protrudes in a direction parallel to the axial direction of the rotation axis of the open link 32 relative to the outside open lever 34. The open link biasing spring 33 is engaged with the spring engagement portion 322.

[0027] The outside open lever 34 is rotatably supported relative to the housing and can be selectively moved between an initial position and an operating position by rotation. The outside open lever 34 is biased to the initial position by an outside open lever biasing spring 343. The outside open lever 34 is linked to the outside door handle 5 of the door 1A, and when the outside door handle 5 is operated manually, it moves from the initial position to the operating position in conjunction with the outside door handle 5. The outside open lever 34 includes an inside lever engaging portion 341 and an open link support portion 342. The open link support portion 342 is the part that rotatably supports the open link 32.

[0028] The inside lever 35 is rotatably supported relative to the housing and can be selectively moved between an initial position and an operating position by rotation. The inside lever 35 includes an inside open lever engaging portion 351 and an outside open lever engaging portion 352. The outside open lever engaging portion 352 is configured to engage with and disengage from the inside lever engaging portion 341 of the outside open lever 34. When the inside lever 35 moves from the initial position to the operating position, the outside open lever engaging portion 352 engages with the inside lever engaging portion 341 of the outside open lever 34, pressing the outside open lever 34 and moving the outside open lever 34 from the initial position to the operating position.

[0029] The inside open lever 36 is rotatably supported relative to the housing and can be selectively moved between an initial position and an operating position by rotation. The inside open lever 36 is biased to the initial position by an inside open lever biasing spring. The inside open lever 36 is linked to the inside door handle 6 of the door 1A, and when the inside door handle 6 is operated manually, the inside open lever 36 moves from the initial position to the operating position in conjunction with the inside door handle 6. The inside open lever 36 is provided with an inside lever engaging portion 361. The inside lever engaging portion 361 is configured to engage with and disengage from the inside open lever engaging portion 351 of the inside lever 35. When the inside open lever 36 moves from the initial position to the operating position, the inside lever engaging portion 361 engages with the inside open lever engaging portion 351 of the inside lever 35, pressing the inside lever 35 and moving the inside lever 35 from the initial position to the operating position.

[0030] Thus, the outside open lever 34 moves from its initial position to the operating position by manual operation of the outside door handle 5, and also moves from its initial position to the operating position by manual operation of the inside door handle 6, which sequentially moves the inside open lever 36 and inside lever 35 from their initial positions to the operating positions. When the outside open lever 34 moves from its initial position to the operating position while the open link 32 is in the unlocked position, the open link 32, release lever 31, and lift lever 23 sequentially move from their initial positions to the operating positions (see Figures 8 and 9), switching the latch mechanism 20 to the unlatched state. As a result, the user can open the door 1A by manually operating the outside door handle 5 or the inside door handle 6 to switch the latch mechanism 20 from the latched state to the unlatched state. On the other hand, when the open link 32 is in the locked position, the open link 32 does not come into contact with (engage with) the release lever 31 even when it moves to the operating position. Therefore, even if the user manually operates the outside door handle 5 or the inside door handle 6, they cannot switch the latch mechanism 20 to the unlatched state and thus cannot open the door 1A.

[0031] The locking mechanism 40 can switch between a locked state (see Figures 4 and 5) and an unlocked state (see Figures 2 and 3). The locked state is a state in which switching the latch mechanism 20 to the unlatched state by manual operation of the outside door handle 5 or the inside door handle 6 is prohibited. The unlocked state is a state in which switching the latch mechanism 20 to the unlatched state by manual operation of the outside door handle 5 or the inside door handle 6 is permitted. The locking mechanism 40 comprises a locking lever 41, a locking link 42, an active lever 43, and a lock state detection switch 44.

[0032] The locking lever 41 is rotatably supported relative to the housing and can be selectively moved between an unlocked position and a locked position by rotation. The locking lever 41 comprises a gear portion 411 and a locking link engagement portion 412. The gear portion 411 is the part of a sector gear that meshes with a worm 62 attached to the rotating shaft of the first motor 61. The locking link engagement portion 412 is formed at a position radially outward from the rotation center of the locking lever 41. One end of the locking link 42 is rotatably connected to the locking link engagement portion 412.

[0033] The locking link 42 is an elongated member. A cam pin engagement portion 421 is formed in the middle of the locking link 42 in the longitudinal direction. The cam pin engagement portion 421 is formed to protrude in a direction perpendicular to the longitudinal direction of the locking link 42. In addition, the locking link engagement portion 412 of the locking lever 41 is rotatably connected to one end of the locking link 42 in the longitudinal direction, and the locking link engagement portion 431 of the active lever 43 is rotatably connected to the other end of the locking link 42 in the longitudinal direction. The locking link 42 is linked to the locking lever 41, moving to the unlocked position when the locking lever 41 moves to the unlocked position, and moving to the locked position when the locking lever 41 moves to the locked position.

[0034] The active lever 43 is supported in the housing coaxially with the inside lever 35 and rotatably independently of the inside lever 35. The active lever 43 is selectively movable between a locked position and an unlocked position by interlocking with the locking lever 41 via a locking link 42. The active lever 43 moves to the locked position when the locking lever 41 moves to the locked position, and moves to the unlocked position when the locking lever 41 moves to the unlocked position. The locked position is at one end of the range of motion of the active lever 43, and the unlocked position is at the other end of the range of motion of the active lever 43. The active lever 43 is selectively biased to the locked position and the unlocked position by a stopper spring (not shown). Specifically, when the active lever 43 is located on the side of the range of motion closer to the locked position, it is biased to the locked position, and when it is located on the side of the range of motion closer to the unlocked position, it is biased to the unlocked position.

[0035] The active lever 43 comprises a locking link engagement portion 431 and a spring mounting portion 432. The locking link engagement portion 431 is the portion to which the locking link 42 is rotatably connected. The spring mounting portion 432 is the portion to which the open link biasing spring 33 is attached. The open link biasing spring 33 holds the open link 32 in the locked position when the active lever 43 is in the locked position, and holds the open link 32 in the unlocked position when the active lever 43 is in the unlocked position. However, even when the active lever 43 is in the unlocked position, the open link biasing spring 33 allows the open link 32 to be in the locked position by elastic deformation. For example, as shown in Figures 3 and 5, the open link biasing spring 33 is a torsion coil spring having two parallel arms, and the two arms are elastically deformable so that they spread apart from each other. The spring engagement portion 322 of the open link 32 is located between the two arms of the open link biasing spring 33 and protrudes in a direction parallel to the axial direction of the rotation axis of the open link 32.

[0036] The lock state detection switch 44 detects the state of the lock mechanism 40 (locked state, unlocked state). The lock state detection switch 44 is pressed by the locking lever 41 when the locking lever 41 is in the unlock-compatible position (unlocked state) (see Figures 4 and 5), and the locking lever 41 is separated when the locking lever 41 is in the lock-compatible position (locked state) (see Figures 6 and 7).

[0037] The first motor 61 is a drive source that drives the locking mechanism 40. A worm 62 is attached to the rotating shaft of the first motor 61. The gear portion 411 of the locking lever 41 meshes with the worm 62. When the locking lever 41 moves to the lock-compatible position due to the driving force of the first motor 61, the active lever 43, which is linked to the locking lever 41 via the locking link 42, moves to the lock-compatible position, thereby moving the open link 32 to the lock position. Also, when the locking lever 41 moves to the unlock-compatible position due to the driving force of the first motor 61, the active lever 43, which is linked to the locking lever 41 via the locking link 42, moves to the unlock-compatible position, thereby moving the open link 32 to the unlock position. In this way, the door lock device 11A can be switched between a locked state and an unlocked state by the driving force of the first motor 61. Then, when the lock mechanism 40 is in the unlocked state, the door lock device 11A switches the latch mechanism 20 from the latched state to the unlatched state by manually operating the outside door handle 5 or the inside door handle 6, thereby allowing the door 1A to be opened.

[0038] The double lock mechanism 50 can be switched between a double lock set state (see Figures 6 and 7) and a double lock unset state (see Figures 4 and 5) when the lock mechanism 40 is in the locked state. The double lock set state is a state in which switching the lock mechanism 40 to the unlocked state is prohibited. The double lock unset state is a state in which switching the lock mechanism 40 to the unlocked state is permitted. The double lock mechanism 50 is composed of a knock-type cam mechanism that alternately switches between the double lock set state and the double lock unset state by a knock operation in the same direction.

[0039] The double lock mechanism 50 (knock-type cam mechanism) comprises a pin 51, an outer cylinder 52, an inner cylinder 53, and a pin biasing spring (not shown). The pin 51 is a long, rod-shaped member. A pin cam portion (not shown) is formed on the outer circumferential surface of the pin 51. The pin cam portion is a projection extending in the axial direction. The pin 51 has its intermediate portion inserted into the outer cylinder 52 and inner cylinder 53 so that its front and rear ends are exposed, and is rotatable relative to the outer cylinder 52 and inner cylinder 53, as well as movable in the axial direction. By moving in the axial direction, the pin 51 can be selectively moved between a protruding position and a retracted position. The protruding position is when the pin 51 is moved forward (from the rear end towards the front end). The retracted position is when the pin 51 is moved backward (from the front end towards the rear end). Furthermore, the pin 51 is biased forward in the axial direction relative to the outer cylinder 52 by a pin biasing spring. An outer cylinder cam portion (not shown) is formed on the inner circumferential surface of the outer cylinder 52. The outer cylinder cam portion has a plurality of cam teeth and cam grooves formed alternately in the circumferential direction. The pin 51 is held in a protruding position by the engagement of the pin cam portion with the cam groove of the outer cylinder cam portion, and is held in a retracted position by the engagement of the pin cam portion with the cam teeth of the outer cylinder cam portion. The inner cylinder 53 is a knock member inserted into the outer cylinder 52 and is movable in the axial direction relative to the outer cylinder 52. By moving in the axial direction, the inner cylinder 53 can move between a non-switching position and a switching position. An inner cylinder cam portion (not shown) is formed on the end face of the inner cylinder 53 facing the pin cam portion. The inner cylinder cam portion is a cam surface having a plurality of peaks and valleys formed alternately in the circumferential direction. When the inner cylinder 53 moves from the non-switching position to the switching position, the inner cylinder cam portion presses the pin cam portion of the pin 51 against the biasing force of the pin biasing spring with its cam surface, causing the pin 51 to rotate while being pushed backward. Furthermore, a cam arm 531 is formed on the outer circumferential surface of the inner cylinder 53. The cam arm 531 is a tongue-shaped portion that protrudes in a direction perpendicular to the axial direction of the inner cylinder 53.

[0040] In the double lock mechanism 50, as shown in Figure 11, the rotating member 73 is rotated clockwise in the figure, and the cam arm 531 is pressed to move the inner cylinder 53 from the non-switching position to the switching position. This causes the cam surface of the inner cylinder cam to engage with the pin cam, rotating the pin 51 while pressing it backward. Then, the pressure on the cam arm 531 is released, returning the inner cylinder 53 from the switching position to the non-switching position. The biasing force of the pin biasing spring causes the pin 51 to move forward, so that the pin cam engages with the cam teeth or cam groove of the outer cylinder cam of the outer cylinder 52. As a result, each time the cam arm 531 is operated and released, the pin cam engages alternately with the cam teeth and cam groove, allowing the pin 51 to be alternately switched between the protruding position and the retracted position.

[0041] The double lock mechanism 50, when the locking link 42 of the lock mechanism 40 is in the locked position and the pin 51 moves to the protruding position, engages with the cam pin engaging portion 421 of the locking link 42, restricting the movement of the locking link 42 from the locked position to the unlocked position (see Figures 6 and 7). This prevents the lock mechanism 40 from switching to the unlocked state (double lock set state). On the other hand, when the pin 51 of the double lock mechanism 50 moves to the retracted position, it disengages from the cam pin engaging portion 421 of the pin 51, allowing the locking link 42 to move from the locked position to the unlocked position (see Figures 4 and 5). This allows the lock mechanism 40 to switch to the unlocked state (double lock unset state).

[0042] The double-lock state detection switch 54 detects the state of the double-lock mechanism 50 (double-lock set state, double-lock unset state). The double-lock state detection switch 54 is installed such that when the pin 51 is in the retracted position (double-lock unset state), it is pressed by the pin 51 (see Figures 4 and 5), and when the pin 51 is in the protruding position (double-lock set state), the pin 51 separates (see Figures 6 and 7).

[0043] The second motor 71 is the drive source for the rotating member 73. A worm 72 is attached to the rotating shaft of the second motor 71. The rotating member 73, which is configured as a worm wheel, meshes with the worm 72. The second motor 71 can drive the rotating member 73 in both forward and reverse rotation directions.

[0044] The rotating member 73 is rotationally driven by the second motor 71, allowing it to move between a neutral position, an unlatched position, and a cam operating position. The neutral position is an intermediate position within the range of motion of the rotating member 73. The unlatched position is at one end of the range of motion of the rotating member 73. The cam operating position is at the other end of the range of motion of the rotating member 73. The rotating member 73 also includes a release lever engaging portion 731 and a cam engaging portion 732. The release lever engaging portion 731 is configured to engage with and disengage from the rotating member engaging portion 311 of the release lever 31. However, the rotating member engaging portion 311 of the release lever 31 contacts the release lever engaging portion 731 of the rotating member 73 when the rotating member 73 is in a rotational position between the neutral position and the unlatched position, and does not contact the release lever engaging portion 731 when the rotating member 73 is in a rotational position between the neutral position and the cam operating position. The cam engagement portion 732 is configured to engage with and disengage from the cam arm 531 of the double lock mechanism 50. However, the cam arm 531 contacts the cam engagement portion 732 of the rotating member 73 when the rotating member 73 is in a rotational position between the neutral position and the cam operating position, and does not contact the cam engagement portion 732 when the rotating member 73 is in a rotational position between the neutral position and the unlatching position.

[0045] Therefore, as shown in Figures 12 and 13, the second motor 71 rotates the rotating member 73 in one direction (clockwise in Figure 12) to move the rotating member 73 from the neutral position to the unlatching position. This causes the release lever engaging portion 731 of the rotating member 73 to engage with the rotating member engaging portion 311 of the release lever 31, pressing the release lever 31 and moving the release lever 31 to the operating position. When the release lever 31 moves to the operating position, the lift lever engaging portion 312 of the release lever 31 engages with the lift lever 23, pressing the lift lever 23 and moving the lift lever 23 to the operating position, switching the latch mechanism 20 to the unlatched state. Since the rotating member 73 directly presses the release lever 31 without the intermediary of the open link 32, the latch mechanism 20 can be switched to the unlatched state by the second motor 71 regardless of the state of the lock mechanism 40 and the double lock mechanism 50.

[0046] Furthermore, as shown in Figures 10 and 11, the second motor 71 rotates the rotating member 73 in the opposite direction to the first direction (clockwise in Figure 11), moving the rotating member 73 from the neutral position to the cam operation position. This causes the cam engagement portion 732 of the rotating member 73 to engage with the cam arm 531 of the double lock mechanism 50, pressing the cam arm 531 and moving the inner cylinder 53 (knock member) from the non-switching position to the switching position. Each time the rotating member 73 is moved from the neutral position to the cam operation position by the driving force of the second motor 71 in the opposite direction, and the rotating member 73 is returned to the neutral position by the biasing force of the rotating member biasing spring, the state of the double lock mechanism 50 can be alternately switched between the double lock set state and the double lock unset state.

[0047] The door lock device 11A also includes a key lever 45, a key switch lever 46, and a key crank 47. The key lever 45 is rotatable integrally with the inner cylinder (plug) of the key cylinder 9 by operation of the key cylinder 9. The key switch lever 46 is rotatable relative to the housing and can move in conjunction with the key lever 45 to a neutral position, an unlock position, and a lock position. As a result, the key switch lever 46 moves from the neutral position to the unlock position or the lock position in conjunction with operation of the key cylinder 9. The neutral position is the middle position in the range of motion of the key switch lever 46. The unlock position is the position rotated in one direction from the neutral position. The lock position is the position rotated in the opposite direction from the neutral position.

[0048] The key crank 47 is rotatably supported relative to the housing and can be selectively moved between an initial position and an operating position by rotation. When the key switch lever 46 moves from the neutral position to the unlock position, the key crank 47 is pressed by the key switch lever 46 and moves from the initial position to the operating position. When the key crank 47 moves to the operating position, it presses against the cam arm 531, moving the inner cylinder 53 from the non-switching position to the switching position. Therefore, when the double lock mechanism 50 is in the double lock set state, the key cylinder 9 can be operated to switch it to the double lock unset state. This makes it possible to manually release the double lock in an emergency, for example, if the vehicle battery runs out and the second motor 71 is unable to release the double lock. However, the key cylinder 9 is located only on the driver's side door 1A, and emergency release of the double lock can only be performed on the driver's side door 1A. As a result, the locking and unlocking states of the double locks on the driver's side door 1A and the other doors 1B, 1C, and 1D may not match.

[0049] As shown in Figure 14, the control device 80 is configured as a microprocessor centered around a CPU 81. In addition to the CPU 81, it includes a ROM 82 for storing processing programs, a RAM 83 for temporarily storing data, input / output ports, communication ports, etc. The control device 80 receives signals from various switches, such as a lock state detection switch 44 and a double lock state detection switch 54, for each of the door lock devices 11A, 11B, 11C, and 11D. The control device 80 also receives signals from the door open / close switch 91 and signals from a wireless remote control key 92, which is configured as a so-called smart key. The door open / close switch 91 is a switch for instructing the opening and closing of the door by user operation, and is installed near the outside door handle 5 of the driver's door 1A and the passenger's door 1B, or near the outside door handle 5 of the outer panel 4. The door open / close switch 91 may be a push-button type switch or a touch-type switch. The door open / close switch 91 may also be a sensor that detects the operation of the outside door handle 5. The remote control key 92 allows for the locking and unlocking of doors 1A, 1B, 1C, and 1D, as well as the double locking mechanism, via remote operation. The control device 80 also outputs drive signals to the first motor 61 and the second motor 71 for each of the door lock devices 11A, 11B, 11C, and 11D.

[0050] Next, the operation of the door lock system 10 of this embodiment, as configured in this way, will be described. In particular, the operation when double locking is requested and the operation when double locking is requested will be described. First, the operation when double locking is requested will be described, and then the operation when double locking is requested will be described. Figure 15 is a flowchart showing an example of a double locking control routine executed by the CPU 81 of the control device 80.

[0051] When the double lock control routine is executed, the CPU 81 of the control device 80 first determines whether or not it has received a double lock request from the higher-level system (step S100). A double lock request is made, for example, when a predetermined time has elapsed since there has been no response from the remote control key 92 carried by the user, or when a door lock is requested by operating the remote control key 92 or the door open / close switch 91, and the locking mechanisms 40 of the door lock devices 11A, 11B, 11C, and 11D are switched to the locked state. If the CPU 81 determines that it has not received a double lock request, it terminates this routine.

[0052] On the other hand, when the CPU 81 determines that it has received a double-lock locking request, it inputs a signal from the double-lock state detection switch 54 of the door lock device 11A located on the driver's side (FrRH) door 1A (step S102). Next, the CPU 81 determines, based on the input signal, whether the state of the double-lock mechanism 50 of FrRH is in the double-lock unset state or not (step S104). If the CPU 81 determines that the state of the double-lock mechanism 50 of FrRH is in the double-lock unset state, it drives and controls the corresponding second motor 71 so that the state of the double-lock mechanism 50 switches (step S106) and proceeds to step S108. On the other hand, if the CPU 81 determines that the state of the double-lock mechanism 50 of FrRH is not in the double-lock unset state but in the double-lock set state, it skips step S106 and proceeds to step S108.

[0053] Next, the CPU 81 receives a signal from the double lock state detection switch 54 of the passenger-side (FrLH) door lock device 11B (step S108). Subsequently, the CPU 81 determines, based on the input signal, whether the state of the double lock mechanism 50 of the FrLH is in the double lock unset state or not (step S110). If the CPU 81 determines that the state of the double lock mechanism 50 of the FrLH is in the double lock unset state, it drives and controls the corresponding second motor 71 so that the state of the double lock mechanism 50 switches (step S112), and proceeds to step S114. On the other hand, if the CPU 81 determines that the state of the double lock mechanism 50 of the FrLH is not in the double lock unset state but in the double lock set state, it skips step S112 and proceeds to step S114.

[0054] Next, the CPU 81 receives a signal from the double lock state detection switch 54 of the rear seat right (RrRH) door lock device 11C (step S114). Subsequently, the CPU 81 determines, based on the input signal, whether the state of the RrRH double lock mechanism 50 is in the double lock unset state or not (step S116). If the CPU 81 determines that the state of the RrRH double lock mechanism 50 is in the double lock unset state, it drives and controls the corresponding second motor 71 to switch the state of the double lock mechanism 50 (step S118) and proceeds to step S120. On the other hand, if the CPU 81 determines that the state of the RrRH double lock mechanism 50 is not in the double lock unset state but in the double lock set state, it skips step S118 and proceeds to step S120.

[0055] Next, the CPU 81 receives a signal from the double lock state detection switch 54 of the rear left (RrLH) door lock device 11D (step S120). Subsequently, the CPU 81 determines, based on the input signal, whether the state of the RrLH double lock mechanism 50 is in the double lock unset state or not (step S122). If the CPU 81 determines that the state of the RrLH double lock mechanism 50 is in the double lock unset state, it drives and controls the corresponding second motor 71 to switch the state of the double lock mechanism 50 (step S124) and terminates this routine. On the other hand, if the CPU 81 determines that the state of the RrLH double lock mechanism 50 is not in the double lock unset state but in the double lock set state, it skips step S124 and terminates this routine.

[0056] The second motor 71 is used for both switching the state of the latch mechanism 20 and switching the state of the double lock mechanism 50. The double lock mechanism 50 is configured to alternately switch between a double lock set state and a double lock unset state by being driven in the opposite direction to when the second motor 71 switches the state of the latch mechanism 20. As a result, for example, if the double lock of the driver's side door 1A is manually released in an emergency, the locked and unlocked states of the double lock may not match between the driver's side door 1A and the other doors 1B, 1C, and 1D. In this embodiment, when the CPU 81 receives a double lock lock request, it checks whether the state of the double lock mechanism 40 is in the double lock unset state for each door lock device 11A, 11B, 11C, and 11D of the vehicle's doors 1A, 1B, 1C, and 1D using the double lock state detection switch 54 for each device. The CPU 81 then drives and controls the corresponding second motor 71 so that the state of the double lock mechanism 40 switches for door lock devices that are in the double lock unset state, but does not drive and control the corresponding second motor 71 for door lock devices that are in the double lock set state. As a result, in response to a double lock locking request, the state of the double lock mechanism 40 for all doors 1A, 1B, 1C, and 1D can be made to match the double lock set state.

[0057] Next, we will describe the operation when a double lock release is requested. Figures 16 and 17 are flowcharts showing an example of a double lock release control routine executed by the CPU 81.

[0058] When the double lock release control routine is executed, the CPU 81 first determines whether or not it has received a double lock release request from the higher-level system (step S200). A double lock release request is made, for example, when the door lock is requested to be released by operating the remote control key 92 or the door open / close switch 91. After the double lock is released, the door lock is also released. If the CPU 81 determines that it has not received a double lock release request, it terminates this routine.

[0059] On the other hand, when the CPU 81 determines that it has received a double lock unset request, it inputs a signal from the double lock state detection switch 54 of the door lock device 11A located on the driver's side (FrRH) door 1A (step S202). Next, the CPU 81 determines, based on the input signal, whether the state of the double lock mechanism 50 of FrRH is in the double lock set state or not (step S204). If the CPU 81 determines that the state of the double lock mechanism 50 of FrRH is in the double lock set state, it drives and controls the corresponding second motor 71 so that the state of the double lock mechanism 50 switches (step S206). Next, the CPU 81 inputs a signal from the double lock state detection switch 54 of FrRH (step S208). Next, the CPU 81 determines, based on the input signal, whether the state of the double lock mechanism 50 of FrRH has switched to the double lock unset state or not (step S210). If the CPU 81 determines that the state of the FrRH double lock mechanism 50 has not switched to the double lock unset state, it increments the double lock anomaly detection counter for FrRH by 1 (step S212) and determines whether the double lock anomaly detection counter for FrRH is equal to or greater than a threshold (for example, value 2 or value 3) (step S214). If the CPU 81 determines that the double lock anomaly detection counter for FrRH is less than the threshold, it returns to step S208 and repeats the process.

[0060] During the repetition of steps S208 to S214, if CPU 81 determines in step S214 that the state of the double lock mechanism 50 of FrRH has not switched to the double lock unset state, and that the double lock anomaly detection counter for FrRH has exceeded a threshold value, it outputs an error (step S264) and terminates this routine. On the other hand, if CPU 81 determines in step S210 that the state of the double lock mechanism 50 of FrRH has switched to the double lock unset state, it resets the double lock anomaly detection counter for FrRH to a value of 0 (step S216) and proceeds to step S218.

[0061] Next, the CPU 81 receives a signal from the double lock state detection switch 54 of the passenger side (FrLH) door lock device 11B (step S218). Subsequently, the CPU 81 determines, based on the input signal, whether the state of the double lock mechanism 50 of FrLH is in the double lock set state (step S220). If the CPU 81 determines that the state of the double lock mechanism 50 of FrLH is in the double lock set state, it drives and controls the corresponding second motor 71 so that the state of the double lock mechanism 50 switches (step S222). Next, the CPU 81 receives a signal from the double lock state detection switch 54 of FrLH (step S224). Subsequently, the CPU 81 determines, based on the input signal, whether the state of the double lock mechanism 50 of FrLH has switched to the double lock unset state (step S226). If the CPU 81 determines that the state of the double lock mechanism 50 of the FrLH has not switched to the double lock unset state, it increments the double lock anomaly detection counter for the FrLH by 1 (step S228) and determines whether the double lock anomaly detection counter for the FrLH is equal to or greater than a threshold (for example, value 2 or value 3) (step S230). If the CPU 81 determines that the double lock anomaly detection counter for the FrLH is less than the threshold, it returns to step S222 and repeats the process.

[0062] If the CPU 81 determines in step S230 that the double lock anomaly detection counter for FrLH has exceeded a threshold value without the state of the double lock mechanism 50 of FrLH switching to the double lock unset state during the repetition of the processing in steps S222 to S230, it outputs an error (step S264) and terminates this routine. On the other hand, if the CPU 81 determines in step S226 that the state of the double lock mechanism 50 of FrLH has switched to the double lock unset state, it resets the double lock anomaly detection counter for FrLH to a value of 0 (step S232) and proceeds to step S234.

[0063] Next, the CPU 81 receives a signal from the double lock state detection switch 54 of the rear right (RrRH) door lock device 11C (step S234). Subsequently, the CPU 81 determines, based on the input signal, whether the state of the RrRH double lock mechanism 50 is in the double lock set state (step S236). If the CPU 81 determines that the state of the RrRH double lock mechanism 50 is in the double lock set state, it drives and controls the corresponding second motor 71 so that the state of the double lock mechanism 50 switches (step S238). Next, the CPU 81 receives a signal from the RrRH double lock state detection switch 54 (step S240). Subsequently, the CPU 81 determines, based on the input signal, whether the state of the RrRH double lock mechanism 50 has switched to the double lock unset state (step S242). If the CPU 81 determines that the state of the RrRH double lock mechanism 50 has not switched to the double lock unset state, it increments the RrRH double lock anomaly detection counter by 1 (step S244) and determines whether the RrRH double lock anomaly detection counter is equal to or greater than a threshold (for example, value 2 or value 3) (step S246). If the CPU 81 determines that the RrRH double lock anomaly detection counter is less than the threshold, it returns to step S238 and repeats the process.

[0064] During the repetition of the processing in steps S238 to S246, if CPU 81 determines in step S246 that the double lock anomaly detection counter for RrRH has exceeded a threshold value without the state of the RrRH double lock mechanism 50 switching to the double lock unset state, it outputs an error (step S264) and terminates this routine. On the other hand, if CPU 81 determines in step S242 that the state of the RrRH double lock mechanism 50 has switched to the double lock unset state, it resets the double lock anomaly detection counter for RrRH to a value of 0 (step S248) and proceeds to step S250.

[0065] Next, the CPU 81 receives a signal from the double lock state detection switch 54 of the rear left (RrLH) door lock device 11D (step S250). Subsequently, the CPU 81 determines, based on the input signal, whether the state of the RrLH double lock mechanism 50 is in the double lock set state (step S252). If the CPU 81 determines that the state of the RrLH double lock mechanism 50 is in the double lock set state, it drives and controls the corresponding second motor 71 so that the state of the double lock mechanism 50 switches (step S254). Next, the CPU 81 receives a signal from the RrLH double lock state detection switch 54 (step S256). Subsequently, the CPU 81 determines, based on the input signal, whether the state of the RrLH double lock mechanism 50 has switched to the double lock unset state (step S258). If the CPU 81 determines that the state of the RrLH double lock mechanism 50 has not switched to the double lock unset state, it increments the RrLH double lock anomaly detection counter by 1 (step S260) and determines whether the RrLH double lock anomaly detection counter is equal to or greater than a threshold (for example, value 2 or value 3) (step S262). If the CPU 81 determines that the RrLH double lock anomaly detection counter is less than the threshold, it returns to step S254 and repeats the process.

[0066] During the repetition of the processing in steps S254 to S262, if the CPU 81 determines in step S262 that the state of the RrLH double lock mechanism 50 has not switched to the double lock unset state and that the double lock anomaly detection counter for RrLH has exceeded a threshold value, it outputs an error (step S264) and terminates this routine. On the other hand, if the CPU 81 determines in step S258 that the state of the RrLH double lock mechanism 50 has switched to the double lock unset state, it resets the double lock anomaly detection counter for RrLH to a value of 0 (step S266) and terminates this routine.

[0067] Thus, when the CPU 81 receives a double lock release request, it checks whether the state of the double lock mechanism 40 for each door lock device 11A, 11B, 11C, and 11D of the vehicle's doors 1A, 1B, 1C, and 1D is in the double lock set state using the double lock state detection switch 54 for each device. The CPU 81 then drives the corresponding second motor 71 to switch the state of the double lock mechanism 40 for door lock devices that are in the double lock set state, and does not drive the corresponding second motor 71 for door lock devices that are in the double lock unset state. In this way, the state of the double lock mechanism 40 for all doors 1A, 1B, 1C, and 1D can be made to match the double lock unset state in response to a double lock release request. Furthermore, if the CPU 81 controls the drive of the corresponding second motor 71 of the door lock device that is in the double lock set state but does not switch to the double lock unset state, it will repeat the drive control of the second motor 71 until the number of repetitions reaches a predetermined number (until the double lock abnormality detection counter exceeds a threshold), thereby ensuring that the double lock is released more reliably.

[0068] Furthermore, the double lock mechanism 50 is configured to alternately switch between a double lock set state and a double lock unset state by a knocking operation, and the switching to the double lock unset state and the switching to the unlatched state are performed by a single motor (second motor 71), thus reducing the number of parts and further lowering manufacturing costs.

[0069] It goes without saying that this disclosure is not limited in any way to the embodiments described above, and can be implemented in various forms as long as they fall within the technical scope of this disclosure.

[0070] For example, in the embodiment described above, the first motor 61 was used to drive the locking mechanism 40, and the second motor 71 was used to drive both the latching mechanism 20 and the double locking mechanism 50. However, the first motor 61 may be used to drive both the locking mechanism 40 and the double locking mechanism 50, and the second motor 71 may be used to drive the latching mechanism 20. Alternatively, different motors may be used to drive the latching mechanism 20, the locking mechanism 40, and the double locking mechanism 50, respectively.

[0071] In the embodiment described above, the door lock system 10 is provided with a single control device 80 that controls multiple door lock devices 10A, 10B, 10C, and 10D. However, as illustrated in Figure 18, the door lock system 110 may also be provided with an equal number of door lock control devices 112A, 112B, 112C, and 112D, each controlling one of the multiple door lock devices 10A, 10B, 10C, and 10D, in addition to the control device 80. The control device 80 is configured to be able to communicate with each other and to receive signals from the remote control key 92. In this case, in the double locking control routine, for example, when the control device 80 receives a double locking request in step S100, it can instruct the door lock control device 112A to execute the processes in steps S102 to S106, the door lock control device 112B to execute the processes in steps S108 to S112, the door lock control device 112C to execute the processes in steps S114 to S118, and the door lock control device 112D to execute the processes in steps S120 to S124. Furthermore, in the double lock release control routine, for example, when the control device 80 receives a double lock release request in step S200, it can instruct the door lock control device 112A to execute the processes in steps S202 to S216 and S264, the door lock control device 112B to execute the processes in steps S218 to S232 and S264, the door lock control device 112C to execute the processes in steps S234 to S248 and S264, and the door lock control device 112D to execute the processes in steps S250 to S266. The door lock control devices 112A, 112B, 112C, and 112D control their respective door lock devices 10A, 10B, 10C, and 10D in parallel processing.

[0072] Furthermore, as illustrated in Figure 19, the door lock system may also include, in addition to the control device 80, a door lock control device 212A that controls some of the multiple door lock devices 10A, 10B, 10C, 10D (for example, door lock devices 10A, 10B) and a door lock device 212B that controls the other multiple (for example, door lock devices 10C, 10D). The control device 80 is configured to communicate with the door lock devices 212A and 212B and to receive signals from the remote control key 92. In this case, in the double lock locking control routine, for example, when the control device 80 receives a double lock locking request in step S100, it can instruct the door lock control device 212A to execute the processes in steps S102 to S112 and instruct the door lock control device 212B to execute the processes in steps S114 to S124. Furthermore, in the double lock release control routine, for example, when the control device 80 receives a double lock release request in step S200, it can instruct the door lock control device 212A to execute the processes in steps S202 to S232 and S264, and instruct the door lock control device 212B to execute the processes in steps S234 to S266. The door lock control devices 212A and 212B control the corresponding door lock devices 10A, 10B, 10C, and 10D respectively through parallel processing.

[0073] Furthermore, as illustrated in Figure 20, the door lock system 310 may include a single door lock control device 312 that controls multiple door lock devices 10A, 10B, 10C, and 10D, separate from the control device 80 that receives signals from the remote control key 92. [Industrial applicability]

[0074] This disclosure can be used in industries such as the manufacturing of door lock systems. [Explanation of symbols]

[0075] 10 Door lock device, 20 Latch mechanism, 40 Lock mechanism, 50 Double lock mechanism, 61 First motor, 72 Second motor, 80 Control device, 112A, 112B, 112C, 112D, 212A, 212B, 312 Door lock control device (control device).

Claims

1. A door lock system comprising: a plurality of door lock devices provided on a plurality of doors of a vehicle; and a control device for controlling the plurality of door lock devices, Each of the aforementioned multiple door locking devices includes: a latch mechanism that selectively forms a latch state that holds a corresponding door closed and an unlatch state that allows the corresponding door to be opened; a lock mechanism that selectively forms a lock state that prohibits the latch mechanism from switching to the unlatch state and an unlock state that allows the latch mechanism to switch to the unlatch state; a double lock mechanism that selectively forms a double lock set state that prohibits the lock mechanism from switching to the unlock state and a double lock unset state that allows the lock mechanism to switch to the unlock state; a motor that drives the double lock mechanism; and a detector that detects the state of the double lock mechanism. The double lock mechanism alternately switches between the double lock set state and the double lock unset state by driving the motor in one direction. When a switch to the double lock unset state is requested, the control device drives the motor of the door lock device whose double lock mechanism is in the double lock set state as detected by the detector in one direction, and does not drive the motor of the door lock device whose double lock mechanism is in the double lock unset state as detected by the detector in one direction. Door lock system.

2. A door lock system according to claim 1, If the state of the double lock mechanism detected by the corresponding detector remains in the double lock set state despite the corresponding motor being driven in the one direction, the control device repeats the one-way drive control of the corresponding motor until the state of the double lock mechanism detected by the corresponding detector changes to the double lock unset state or until a predetermined number of repetitions is reached. Door lock system.

3. A door lock system comprising: a plurality of door lock devices provided on a plurality of doors of a vehicle; and a control device for controlling the plurality of door lock devices, Each of the aforementioned multiple door locking devices includes: a latch mechanism that selectively forms a latch state that holds a corresponding door closed and an unlatch state that allows the corresponding door to be opened; a lock mechanism that selectively forms a lock state that prohibits the latch mechanism from switching to the unlatch state and an unlock state that allows the latch mechanism to switch to the unlatch state; a double lock mechanism that selectively forms a double lock set state that prohibits the lock mechanism from switching to the unlock state and a double lock unset state that allows the lock mechanism to switch to the unlock state; a motor that drives the double lock mechanism; and a detector that detects the state of the double lock mechanism. The double lock mechanism alternately switches between the double lock set state and the double lock unset state by driving the motor in one direction. When a switch to the double lock set state is requested, the control device drives the motor of the door lock device whose double lock mechanism is detected by the detector as being in the double lock unset state in one direction, and does not drive the motor of the door lock device whose double lock mechanism is detected by the detector as being in the double lock set state in one direction. Door lock system.

4. A door lock system according to any one of claims 1 to 3, A first motor that drives the locking mechanism, A second motor that drives the latch mechanism, Equipped with, The double lock mechanism alternately switches between the double lock set state and the double lock unset state by driving the second motor in the opposite direction to the direction in which the latch mechanism is driven. Door lock system.

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