JP6940038B2 - Door latch system - Google Patents

Description

The present invention relates to a door latch system that controls the opening and closing of a door, and more particularly to a door latch system configured so that the striker can move between a closed position and a pop-up position.

As a door latch system provided between the vehicle body and the door, for example, there is one described in Patent Document 1. In this door latch system, the striker is provided so as to be movable with respect to the vehicle body, and an actuator for moving the striker is provided. The door is provided with a latch unit having a latch that can engage the striker when closed. According to this door latch system, when the latch engages with the striker while the striker is placed in the pop-up position, the striker closes and the striker is placed from the pop-up position to the closed position, and the door is placed with respect to the vehicle body. Is closed.

Japanese Unexamined Patent Publication No. 2004-100225

By the way, the door through which a driver, a passenger, or the like can enter and exit must be configured so that the latch can engage with the striker at the so-called half-latch position. Some latch units that can select the half-latch position usually have a built-in closing actuator that can rotate the latch to the full-latch position when the half-latch position is reached. Therefore, in the above-mentioned door latch system in which the striker moves, when a latch unit with a built-in closing actuator is applied, two different actuators operate when the latch is placed in the half-latch position. Therefore, the control when closing the door becomes complicated.

In view of the above circumstances, it is an object of the present invention to provide a door latch system capable of facilitating control when closing a door.

In order to achieve the above object, the door latch system according to the present invention includes a latch unit provided on either a vehicle body or a door that is openable and closable to the vehicle body, or any of the vehicle body and the door. A door latch system including a striker unit provided on the other side and controlling the opening and closing of the door by engaging the latch unit and the striker unit. The striker unit can be moved to a closed position and a pop-up position, and can be moved to a closed position and a pop-up position. When the latch unit is engaged and the door is closed toward the closed position, the door is moved toward the vehicle body in the closing direction, while when the door is popped toward the pop-up position, the vehicle body is moved. The latch unit is provided with a striker that moves the door in the opening direction, and the latch unit can move between the half-latch position and the full-latch position, and at each of the half-latch position and the full-latch position. A latch that limits the opening of the door to the vehicle body by maintaining the state of being engaged with the striker and a latch detection sensor that detects the position of the latch are provided, and the striker unit is the striker. Is arranged at the pop-up position, the closing operation is started only when the latch detection sensor detects that the latch is arranged at the full latch position.

Further, in the above-described door latch system, the present invention is a courtesy switch that detects whether or not the latch is in the full latch position, and the latch is arranged in the full latch position by the latch detection sensor. It is characterized by including a control unit that notifies when it has not been detected.

Further, the present invention is characterized in that, in the door latch system described above, the control unit lights an indicator lamp to perform notification. According to these inventions, it becomes possible to recognize that the latch unit is in the half latch position.

Further, the present invention is characterized in that, in the door latch system described above, the latch unit starts a release operation when a request signal for opening the door is given while the latch is arranged at the full latch position. And. According to the present invention, the door can be opened by operating, for example, an open switch provided on the vehicle or an open switch provided on the wireless remote controller.

Further, according to the present invention, in the door latch system described above, the striker unit is supported by the mounting base that movably supports the striker and the mounting base that moves in a direction intersecting the moving direction of the striker. A movable member and a cam mechanism provided between the movable member and the striker and converting the movement of the movable member into the movement of the striker are provided, and either the vehicle body or the door is provided via the mounting base. It is provided on the other side, and the striker moves between the closed position and the pop-up position due to the movement of the movable member. According to the present invention, since it is essential to move the movable member in order to move the striker, there is no possibility that the striker will malfunction even when vibration or impact is applied.

Further, in the above-described door latch system, the striker unit links a driving member that reciprocates by the operation of a drive source with the driving member and the movable member, and moves the reciprocating movement of the driving member reciprocatingly. It is characterized by having a link member that transmits to the member. According to the present invention, the striker can be moved between the closed position and the pop-up position by the operation of a single drive source.

Further, the present invention is characterized in that, in the door latch system described above, the driving member rotates and reciprocates by the operation of the driving source. According to the present invention, the striker can be moved without changing the position of the driving member, which is advantageous in terms of installation space.

Further, according to the present invention, in the door latch system described above, each of the link members has flexibility, and a first cord-like body that transmits the forward movement of the driving member to the movable member and a restoration of the driving member. It is characterized by including a second cord-like body that transmits motion to the movable member. According to the present invention, the positions of the movable member and the main driving member can be changed, the degree of freedom of installation is increased, and it is advantageous in terms of versatility.

According to the present invention, only the latch detection sensor that detects whether or not the latch is in the full latch position is applied, and the striker closes only when the latch is placed in the full latch position. Control can be facilitated. Further, an actuator for moving the latch from the half latch position to the full latch position is not required, which is advantageous in terms of manufacturing cost.

FIG. 1 conceptually shows the right rear end portion of a vehicle to which the door latch system according to the embodiment of the present invention is applied, and is a partially enlarged side view of a state in which the tailgate, which is a door, is fully closed. .. FIG. 2 is a partially enlarged side view of the vehicle shown in FIG. 1 in a state where the tailgate is arranged at the pop-up position. FIG. 3 is a side view of the vehicle shown in FIG. 1 in a state where the tailgate is open. FIG. 4 is an external perspective view of a latch unit applied to the door latch system shown in FIG. FIG. 5 is a perspective view showing the internal configuration of the latch unit shown in FIG. FIG. 6 is a perspective view of a main part showing the internal configuration of the latch unit shown in FIG. 4 from another angle. 7A and 7B show a portion of the latch unit shown in FIG. 4 that engages with the striker. FIG. 7A shows a state in which the latch is arranged in the full latch position, and FIG. 7B shows the latch arranged in the half latch position. The figure in the opened state, (c) is the figure in the state where the latch is arranged in the open position. FIG. 8 is an exploded perspective view of a main part of the striker unit applied to the door latch system shown in FIG. 9A and 9B show a striker unit applied to the door latch system shown in FIG. 1, where FIG. 9A is a bottom view of the striker in a closed position, and FIG. 9B is a plan view of the main part thereof. 10A and 10B show a striker unit applied to the door latch system shown in FIG. 1, where FIG. 10A is a bottom view of a striker arranged at a pop-up position, and FIG. 10B is a plan view of a main part thereof. FIG. 11 is a block diagram showing a control system of the door latch system shown in FIG.

Hereinafter, preferred embodiments of the door latch system according to the present invention will be described in detail with reference to the accompanying drawings.

1 to 3 show a main part of a vehicle to which the door latch system according to the embodiment of the present invention is applied. The vehicle illustrated here is a so-called minivan or one-box type having a vehicle body B having an opening A on the back surface and a tailgate (door) C for opening and closing the rear opening A of the vehicle body B. belongs to. The rear opening A of the vehicle body B communicates with the interior space and is provided so that almost the entire rear surface can be opened. The tailgate C has a hinge D between it and the upper edge of the back opening A, and extends along the left-right direction of the vehicle body B (direction perpendicular to the paper surface in FIGS. 1 to 3). ) Can be rotated to open and close the back opening A.

In this vehicle, the latch unit 10 is provided at the lower edge of the tailgate C, while the striker unit 20 is provided at the lower edge of the rear opening A in the vehicle body B. Hereinafter, the configurations of the latch unit 10 and the striker unit 20 will be described in detail, and the feature portions of the present invention will be described. In the following, for convenience, the directions of the respective components of the latch unit 10 and the striker unit 20 will be specified in the posture of being mounted on the vehicle. In this case, the portion located on the right side of the vehicle is defined as the right side, and the portion located on the left side is defined as the left side.

The latch unit 10 is for engaging and holding the striker 21 of the striker unit 20 described later, and is attached to the tailgate C via the case 11. As shown in FIGS. 4 to 6, the latch unit 10 includes a latch 12 and a ratchet 13 inside the case 11. The latch 12 is a plate-shaped member rotatably arranged on one side of the striker entry groove 11a provided in the case 11 via a latch shaft 12a extending above and below the vehicle body B. The latch 12 is provided with a hook portion 12b that limits the deviation of the striker 21 by engaging with the striker 21 that has entered the striker entry groove 11a. Although not explicitly shown in the figure, the latch 12 is provided with a return spring 12c that urges the latch 12 to rotate counterclockwise in FIG. 7 between the latch 12 and the case 11. The ratchet 13 is a plate-shaped member rotatably arranged via a ratchet shaft 13a extending up and down in a portion on the other side of the striker entry groove 11a. The ratchet 13 can limit the counterclockwise rotation of the latch 12 by engaging with the latch 12 rotated from the open position shown in FIG. 7 (c). More specifically, as shown in FIG. 7B, the ratchet 13 can engage with the latch 12 at the half latch position where the hook portion 12b is located at the open end of the striker entry groove 11a, and FIG. 7 As shown in (a), the hook portion 12b can engage with the latch 12 at the full latch position located at the rear end of the striker entry groove 11a. Although not explicitly shown in the figure, the ratchet 13 is provided with a ratchet spring 13b for urging the ratchet 13 to rotate clockwise in FIG. 7 between the ratchet spring 13 and the case 11. When the latch 12 is arranged in the open position as shown in FIG. 7C, the ratchet 13 does not engage with the latch 12.

Further, the latch unit 10 includes a courtesy switch (latch detection sensor) 14, a release lever 15, and a release actuator 16. The courtesy switch 14 detects the rotational position of the latch 12 with respect to the case 11 via the detection protrusion 12d provided on the end surface of the latch 12. In the present embodiment, the courtesy switch 14 is provided so as to turn off when the latch 12 is arranged at the full latch position and output an ON signal when the latch 12 is arranged at a position other than the full latch position. The release lever 15 is rotatably arranged on the case 11 via the lever shaft 15a. The lever shaft 15a extends substantially along the front-rear direction of the vehicle at a position above the ratchet 13, and is released to the case 11 with the working end portion 15b of the release lever 15 extending downward. The lever 15 is rotatably supported. The release lever 15 abuts on the input end 13c of the ratchet 13 via the working end 15b when rotated clockwise in FIG. 5, and counterclockwise the ratchet 13 against the urging force of the ratchet spring 13b. It is possible to rotate to. Although not explicitly shown in the drawing, the release lever 15 is provided with a release spring 15c for urging the release lever 15 to rotate counterclockwise in FIG. 5 between the release lever 15 and the case 11. The release actuator 16 rotates the release lever 15 clockwise in FIG. 5 against the urging force of the release spring 15c when driven. In the present embodiment, the release actuator 16 includes a release motor 16a, a worm gear 16b, and a spiral cam 16c. The release motor 16a is an electric motor capable of rotating in the forward and reverse directions. The worm gear 16b is a speed reducer including a worm 16b1 attached to a drive shaft of a release motor 16a and a worm wheel 16b3 rotatably arranged on a case 11 via a worm shaft 16b2. The spiral cam 16c is integrally provided on the worm wheel 16b3, and is in contact with the input end portion 15d of the release lever 15 via the outer peripheral surface. In the illustrated example, the urging force of the release spring 15c keeps the input end 15d of the release lever 15 in contact with the outer peripheral surface of the spiral cam 16c at a portion below the center of rotation of the worm wheel 16b3. There is. The spiral cam 16c is formed so that the distance from the center of rotation to the outer peripheral surface gradually changes when the worm wheel 16b3 rotates.

Specifically, when the worm wheel 16b3 is in the initial position, as shown in FIG. 6, the portion of the outer peripheral surface of the spiral cam 16c where the release lever 15 abuts is closest to the center of rotation of the worm wheel 16b3. There is. Therefore, the release lever 15 is maintained in a state in which the working end portion 15b is separated from the input end portion on the left side of the input end portion 13c of the ratchet 13. From this state, when the worm wheel 16b3 rotates counterclockwise in FIG. 5, the outer peripheral surface of the spiral cam 16c gradually separates from the center of the worm wheel 16b3, and as a result, the release lever 15 is attached with the release spring 15c. It rotates clockwise in FIG. 5 against the force, and the working end 15b of the release lever 15 comes into contact with the input end 13c of the ratchet 13. After that, as the rotation of the worm wheel 16b3 progresses, the rotation of the release lever 15 progresses, and the ratchet 13 rotates counterclockwise in FIG. 5, so that the engagement state with the latch 12 is released (release operation). When the engagement state between the ratchet 13 and the latch 12 is released, the latch 12 is rotated counterclockwise by the urging force of the return spring 12c, and the engagement state of the strikers 21 and the like by the latch 12 is released. After that, when the worm wheel 16b3 rotates in the opposite direction, the release lever 15 rotates counterclockwise due to the urging force of the release spring 15c, and the working end portion 15b is separated from the input end portion 13c of the ratchet 13. Since it returns, the ratchet 13 can be engaged with the latch 12 again.

On the other hand, as shown in FIGS. 8 to 10, the striker unit 20 includes a reference mounting base 22, a striker 21 arranged on the upper surface side of the mounting base 22, and a cam arranged on the lower surface side of the mounting base 22. It is configured to include a plate (movable member) 23 and a wedge switch 24.

The mounting base 22 is a plate-shaped member having a larger dimension in the left-right direction than the dimension in the front-rear direction, and is attached to the vehicle body B via a fixing bolt E. The mounting base 22 is provided with a cam through hole (cam mechanism) 22a and two plate guide holes 22b. The cam through hole 22a is an elongated through hole formed on the center line that bisects the mounting base 22 to the left and right, and is formed along the front and rear of the vehicle body B. The plate guide holes 22b are groove-shaped notches provided on both sides of the cam through hole 22a, and are formed along the left-right direction of the vehicle.

The striker 21 includes a base plate 21a and an engaging rod 21b held by the base plate 21a. The base plate 21a has a substantially pentagonal shape with a straight trailing edge and a protruding front edge, and has slide guide holes 21c at both left and right ends and a pin mounting hole 21d at the front protruding portion. ing. The slide guide holes 21c form an elongated hole extending along the front-rear direction, and are formed so as to be parallel to each other. The pin mounting hole 21d is a circular hole that penetrates the base plate 21a. The engaging rod 21b has a substantially U-shape, and is fixed to the central portion of the base plate 21a via both ends in a posture in which both ends are arranged in the front-rear direction. The outer diameter of the engaging rod 21b is smaller than the width of the striker entry groove 11a so that the engagement rod 21b can enter the striker entry groove 11a provided in the case 11 of the latch unit 10. By mounting the slide guide pin 25 on the mounting base 22 via the slide guide hole 21c, the striker 21 is placed in the center of the upper surface of the mounting base 22 in a state where the pin mounting hole 21d is located inside the cam through hole 22a. It is arranged. As is clear from the figure, the slide guide pin 25 has a shaft portion 25a having a diameter smaller than that of the slide guide hole 21c and a head portion 25b having a diameter larger than that of the slide guide hole 21c. As a result, the striker 21 can move along the front-rear direction of the vehicle body B in a state where the striker 21 is prevented from moving in the direction away from the mounting base 22. The mounting position of the mounting base 22 and the moving range of the striker 21 with respect to the mounting base 22 are such that the striker 21 is most forward with respect to the mounting base 22 in a state where the latch 12 of the latch unit 10 described above is engaged with the engaging rod 21b. The tailgate C is set to be fully closed with respect to the vehicle body B when it is moved. Hereinafter, the position where the striker 21 moves most forward with respect to the mounting base 22 is referred to as a closed position, and the position where the striker 21 moves most backward is referred to as a pop-up position. Further, the operation in which the striker 21 moves toward the closing position with respect to the mounting base 22 is referred to as a closing operation, and the operation in which the striker 21 moves toward the pop-up position is referred to as a pop-up operation.

The cam plate 23 is a plate-shaped member having a dimension along the front-rear direction of about 1/2 with respect to the mounting base 22 and a dimension smaller than 1/2 along the left-right direction. The cam plate 23 is arranged at a portion located on the front side on the back surface of the mounting base 22 by a mounting pin 26 mounted via the plate guide hole 22b. The mounting pin 26 has a shaft portion 26a having a diameter smaller than that of the plate guide hole 22b and a head portion 26b having a diameter larger than that of the plate guide hole 22b. As a result, the cam plate 23 can move along the left-right direction of the vehicle body B in a state where the cam plate 23 is prevented from moving in the direction away from the mounting base 22. The cam plate 23 is provided with a cam hole (cam mechanism) 23a, two cable hooks 23b, and two switch drive units 23c.

The cam hole 23a is a groove-shaped notch having substantially the same width as the cam through hole 22a of the mounting base 22, and is an opening position with respect to the cam through hole 22a when the cam plate 23 moves left and right with respect to the mounting base 22. Is formed so as to change. More specifically, the cam hole 23a is a cam when the cam plate 23 moves to one moving end in the left-right direction with respect to the mounting base 22, for example, to the right moving end as shown in FIG. It is located at the rear end of the through hole 22a and at the front end of the cam through hole 22a when it moves to the other moving end in the left-right direction, for example, the moving end on the left side as shown in FIG. It is inclined to. A cam roller (cam mechanism) 27 is arranged in the cam hole 23a. The cam roller 27 is a cylindrical member having an outer diameter that fits into the cam hole 23a, and is a cam pin (cam mechanism) that penetrates the central portion of the cam hole 23a and the mounting base 22 in a state of penetrating the cam through hole 22a. It is attached to the base plate 21a via 28. The cam pin 28 has a disc-shaped head 28b having a diameter larger than that of the cam roller 27 at the tip of the cylindrical shaft portion 28a, and the base end portion of the shaft portion 28a is mounted in the pin mounting hole 21d. Therefore, the base plate 21a is mounted so as to project downward from the lower surface facing the mounting base 22.

The cable hook 23b is a hook-shaped portion provided at both left and right ends of the cam plate 23. One ends of cables (cord-like bodies) 30A and 30B are individually engaged with the cable hooks 23b, respectively. The cables 30A and 30B are movably arranged inside the tubular outer tube 31, and the other end thereof is engaged with a common drive pulley (driving member) 32. Although not explicitly shown in the drawing, one end of the outer tube 31 is fixed to the end of the mounting base 22, and the other end is fixed to the support 33 of the drive pulley 32. The drive pulley 32 has a disk shape having boss portions 32a on both end surfaces of the central portion, and the cable 30A engaged with one cable hook 23b engages with one boss portion 32a and the other cable. The cable 30B engaged with the hook 23b is engaged with the other boss portion 32a. When one of the two cables 30A and 30B is pulled out from the boss portion 32a, the other is wound around the boss portion 32a, and when the other is pulled out from the boss portion 32a, one is wound around the boss portion 32a. It is engaged with each boss portion 32a so as to be turned. The winding length of the other cable 30B when one cable 30A is pulled out from the boss portion 32a is set to be substantially equal to the extending length of the plate guide hole 22b formed in the mounting base 22. That is, when the drive pulley 32 rotates in one direction, one cable 30A is pulled out from the boss portion 32a and the other cable 30B is wound around the boss portion 32a, and the wound cable 30B is engaged. The cam plate 23 moves to one side via the cable hook 23b. Similarly, when the drive pulley 32 rotates in the other direction, the other cable 30B is pulled out from the boss portion 32a and one cable 30A is wound around the boss portion 32a, and the wound cable 30A is engaged. The cam plate 23 moves to the other side via the cable hook 23b.

The drive pulley 32 described above can rotate about the axis by driving the slide motor (drive source) 34. Like the release motor 16a, the slide motor 34 is an electric motor capable of rotating in the forward and reverse directions. That is, the drive pulley 32 driven by the slide motor 34 can rotate and reciprocate in the forward and reverse directions about the axis. A worm gear 35 composed of a worm 35a and a worm wheel 35b is interposed between the drive shaft of the slide motor 34 and the drive pulley 32. In the present embodiment, the axial center of the drive pulley 32 and the drive shaft of the slide motor 34 are arranged so as to be in twisted positions.

The switch drive unit 23c is a protruding portion protruding rearward from both ends of an edge portion located on the rear side of the cam plate 23. The two switch drive units 23c are provided on the cam plate 23 so that when the cam plate 23 moves in the left-right direction with respect to the mounting base 22, one of the switch drive units 23c is located at the center of the mounting base 22. be.

The wedge switch 24 is provided with a contactor 24b tiltable with respect to the switch body 24a, and outputs a detection signal according to the tilting direction of the contactor 24b. The wedge switch 24 is attached via the switch body 24a in a state where the contact 24b faces the trailing edge of the cam plate 23 and the switch drive unit 23c can selectively contact the contact 24b. It is attached to the base 22.

FIG. 11 is a block diagram showing a control system of the door latch system. The control unit 100 shown in FIG. 11 controls the lighting control of the indicator lamp 102 and the drive of the release motor 16a and the slide motor 34 based on the detection result of the open switch 101, the detection result of the wedge switch 24, and the detection result of the courtesy switch 14. It is something to do. The open switch 101 is provided in the interior of the vehicle body B or in a wireless remote controller owned by the driver. By operating the open switch 101, a request signal for opening the tailgate C is given to the control unit 100. The indicator lamp 102 is a tail lamp provided at the rear of the vehicle body B or an interior lamp provided in the room.

Hereinafter, the control contents of the control unit 100 will be described. For convenience of explanation, it is assumed that in the current vehicle, the tailgate C is opened and the rear opening A of the vehicle body B is opened, as shown in FIG. At this time, in the latch unit 10, the latch 12 is arranged in the open position as shown in FIG. 7 (c), and in the striker unit 20, as shown in FIG. 10 (b), the cam roller 27 has the cam through hole 22a. It is located on the rear end side, and the striker 21 is arranged at the pop-up position with respect to the mounting base 22. In this case, as shown in FIG. 10A, the cam plate 23 is in a state of being arranged at the moving end on the right side with respect to the mounting base 22.

When the tailgate C is operated so as to close the back opening A of the vehicle body B from the above state, the striker 21 of the striker unit 20 eventually enters the striker entry groove 11a provided in the case 11 of the latch unit 10, and the striker 21 Will rotate the latch 12. As a result, the latch 12 reaches the full latch position shown in FIG. 7 (a) via the half latch position shown in FIG. 7 (b). However, immediately after the striker 21 is arranged at the full latch position, the striker 21 of the striker unit 20 is arranged at the pop-up position. Therefore, as shown in FIG. 2, the tailgate C is fully closed with respect to the vehicle body B. Instead, it will be in a pop-up state.

When the latch 12 moves to the full latch position, a detection signal is output from the courtesy switch 14, and this is detected by the control unit 100. The control unit 100, which has detected that the latch 12 is arranged at the full latch position, drives the slide motor 34 and moves the cam plate 23 to the left side with respect to the mounting base 22. As a result, the cam roller 27 arranged in the cam hole 23a of the cam plate 23 and the cam through hole 22a of the mounting base 22 moves forward due to the tilting action of the cam hole 23a, and the striker 21 closes accordingly. It works and reaches the closed position. As a result, the latch unit 10 engaged with the striker 21 moves together with the striker 21, and as shown in FIG. 1, the tailgate C is fully closed with respect to the vehicle body B. When the wedge switch 24 detects that the cam plate 23 has reached the moving end on the left side, the control unit 100 stops driving the slide motor 34.

On the other hand, when the open switch 101 is operated from the state where the tailgate C is fully closed, the control unit 100 first drives the release motor 16a and releases the ratchet 13 from engaging with the latch 12 via the release lever 15. As a result, the latch 12 is rotated toward the open position by the return spring 12c, and is pushed out in the direction in which the tailgate C is opened by the reaction force of the sealing material (not shown) interposed between the vehicle body B and the tailgate C. The control unit 100, which detects that the latch 12 is not arranged in the full latch position by the courtesy switch 14, drives the slide motor 34 in the opposite direction to the front and moves the cam plate 23 to the right with respect to the mounting base 22. .. As a result, the cam roller 27 moves to the rear side, and the striker 21 pops up accordingly, eventually reaching the pop-up position.

Hereinafter, by repeating the above operation, the tailgate C is opened and closed with respect to the vehicle body B. During these operations, when closing the tailgate C, only the slide motor 34 is rotated to close the striker 21, while when opening the tailgate C, the release lever 15 is operated. It only rotates the release motor 16a. Moreover, the slide motor 34 may be driven only when the latch 12 of the latch unit 10 is arranged at the full latch position. Therefore, it is not necessary for the control unit 100 of the door latch system to perform complicated control.

By the way, when the operating force when closing the tailgate C is small and the latch 12 stops at the half latch position, the control unit 100 cannot detect this, so that the latch 12 remains arranged at the half latch position. .. However, in this case, the indicator lamp 102 is kept lit by the control unit 100. Therefore, it is possible to make the driver and passengers recognize that the tailgate C is maintained in the half-latch position. As a result, for example, if the open switch 101 is operated to transmit a request signal for opening the tailgate C, the latch 12 is released and placed in the open position, so that the tailgate C returns to the open state. Then, the tailgate C can be closed again.

Further, when the tailgate C is open, the latch 12 of the latch unit 10 may be arranged at the full latch position without closing the tailgate C due to mischief or the like. In this case, since the striker 21 is closed by the control unit 100 when the courtesy switch 14 detects the full latch position, the striker 21 is not in the pop-up position by the driver or the like who tried to close the tailgate C. You can make them recognize that. Therefore, if the open switch 101 is operated to transmit a request signal for opening the tailgate C, the striker 21 moves to the pop-up position and the latch 12 is arranged to the open position, so that the tailgate C is subsequently moved. It can be closed normally.

In the above-described embodiment, the door latch system for the tailgate C provided in the rear opening A of the vehicle body B leading to the interior space is illustrated, but the present invention is not limited to this, and for example, 3 It is also possible to target a trunk lid that opens and closes the trunk in a box-type vehicle. In this case, the door is not necessarily the one that opens and closes around the axis along the horizontal direction.

Further, in the above-described embodiment, the striker unit is provided in the vehicle body and the latch unit is provided in the door. However, the present invention is not limited to this, and the latch unit is arranged in the vehicle body to provide the striker unit. May be arranged on the door.

Further, in the above-described embodiment, the cam plate 23 having a plate shape is applied as a movable member, and further, the axis of the drive pulley 32 and the drive shaft of the slide motor 34 are twisted positions. Since it is arranged, the striker unit can be made thinner, which is advantageous in terms of installation space. However, the present invention is not limited to these.

Furthermore, in the above-described embodiment, when the latch 12 is not arranged at the full latch position, the indicator lamp 102 is lit to visually notify, but in addition to the visual notification, or visually. It is also possible to give an auditory notification such as a buzzer instead of the target notification. As the latch unit, a unit provided with a detection sensor for detecting the half latch position may be applied. In this case, it is also possible to drive the release actuator to control the latch to be placed in the open position when the tailgate is maintained in the half-latch state.

10 Latch unit 12 Latch 14 Courtesy switch 20 Striker unit 21 Striker 22 Mounting base 22a Cam through hole 23 Cam plate 23a Cam hole 27 Cam roller 28 Cam pin 30A Cable 30B Cable 32 Drive pulley 34 Slide motor 100 Control unit 102 Indicator lamp B Vehicle body C Tailgate

Claims (5)

A latch unit provided on either one of a vehicle body and a door openable and closable with respect to the vehicle body, and a striker unit provided on either the vehicle body or the door are provided, and the latch unit and the door are provided. A door latch system that controls the opening and closing of the door by engaging the striker unit.
The striker unit can be moved to the closed position and the pop-up position, and when the latch unit is engaged and the closing operation is performed toward the closed position, the striker unit is moved in the direction of closing the door with respect to the vehicle body. It is provided with a striker that moves the door in the direction of opening the door with respect to the vehicle body when the pop-up operation is performed toward the pop-up position.
The latch unit is movable between the half-latch position and the full-latch position, and is maintained in a state of being engaged with the striker at each of the half-latch position and the full-latch position. A latch that limits the opening of the door and a latch detection sensor that detects the position of the latch are provided.
The striker unit is
A mounting base that movably supports the striker,
A movable member supported by the mounting base so as to move in a direction intersecting the moving direction of the striker.
A cam mechanism provided between the movable member and the striker that converts the movement of the movable member into the movement of the striker.
A driving member that reciprocates according to the operation of the drive source,
A first cord-like body that links between the driving member and the movable member and transmits the forward movement of the driving member to the movable member.
With a second cord-like body that links between the driving member and the movable member and transmits the repulsion of the driving member to the movable member.
The striker is moved between the closed position and the pop-up position by the movement of the movable member, and the striker is the striker. A door latch system characterized in that the closing operation is started only when the latch detection sensor detects that the latch is arranged at the full latch position in the state of being arranged at the pop-up position. The latch detection sensor is a courtesy switch that detects whether or not the latch is in the full latch position.
The door latch system according to claim 1, further comprising a control unit that notifies when the latch detection sensor has not detected that the latch is arranged at the full latch position. The door latch system according to claim 2, wherein the control unit lights an indicator lamp to perform notification. The door latch system according to claim 1, wherein the latch unit starts a release operation when a request signal for opening the door is given while the latch is arranged at the full latch position. The door latch system according to claim 1 , wherein the driving member rotates and reciprocates by the operation of the drive source.

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