Tailgate opening and closing device

Abstract

The present invention relates to a tailgate opening and closing device having a simplified tailgate opening and closing structure, reduced manufacturing cost, reduced weight, and improved quality. The device includes: a release gear configured to rotate forward and reversely by a rotational force from a motor; a tightening gear meshing with the release gear; a link mechanism configured to receive a force from the tightening gear to rotate toward a claw; a claw that is caught by the link mechanism and rotates together with the link mechanism to engage with a striker; and a ratchet unit configured to be caught by the claw to restrict the claw from rotating in a state where the claw is engaged with the striker, and configured to allow the claw to rotate in the release operation direction only when the release gear rotates in the release operation direction.

Description

Technical Field

[0001] The present disclosure relates to a tailgate opening and closing device having a simplified tailgate opening and closing structure, reduced manufacturing cost, reduced weight, and improved quality. Background Art

[0002] Generally, a sport utility vehicle (SUV) or a multi-purpose vehicle (MPV) has an opening formed at the rear thereof for a user to easily load items into the vehicle, and a tailgate for opening and closing the opening.

[0003] For example, a claw is mounted to the tailgate, and a striker is mounted to the vehicle body. When the tailgate is closed, the claw engages with the striker, so that the tailgate is locked. When the release lever is operated, the claw disengages from the striker, so that the tailgate is unlocked.

[0004] Particularly, in case of an electric tailgate apparatus that is locked and unlocked by an electrically driven claw and striker, a cinching motor that performs a locking operation and a releasing motor that performs an unlocking operation are additionally installed to perform corresponding functions.

[0005] For example, the tightening motor is connected to the claw device by a separate cable, and the releasing motor is mounted to the claw device.

[0006] In a state in which the claw is semi-engaged with the striker, when the take-up motor is operated to completely close the tailgate, the cable is pulled by the take-up motor, and the claw is fully engaged with the striker.

[0007] In this state, when the release motor is operated to open the tailgate, the claw is released from the striker by the release motor and moves to a position where the claw allows the tailgate to be fully opened, thereby opening the tailgate.

[0008] However, in this electric tailgate device, the tightening motor and the releasing motor are installed separately from each other, thus resulting in an increase in the manufacturing cost and weight of the device. In addition, due to the large number of components, the defect rate of the device increases.

[0009] The information disclosed in this Background section is only for enhancement of understanding of the general background of the disclosure and should not be regarded as an admission or any form of suggestion that this information forms the prior art already known to a person skilled in the art. Summary of the invention

[0010] Therefore, the present disclosure has been made in view of the above problems, and an object of the present disclosure is to provide a tailgate opening and closing device having a simplified tailgate opening and closing structure, reduced manufacturing cost, reduced weight, and improved quality.

[0011] According to the present disclosure, the above and other purposes can be achieved by a tailgate opening and closing device. The device includes: a release gear, which is configured to rotate forward and reversely by a rotational force transmitted from a motor to the release gear to perform a tightening operation and a releasing operation; a tightening gear, which is configured to rotate in mesh with the release gear; a link mechanism, which is configured to receive a force from the tightening gear to rotate toward a claw-shaped member when the tightening gear rotates to perform a tightening operation; a claw-shaped member, which is caught by the link mechanism that rotates to perform a tightening operation and rotates together with the link mechanism to engage with a striker; and a ratchet unit, which is configured to be caught by the claw-shaped member in a state where the claw-shaped member is engaged with the striker to limit the claw-shaped member from rotating in a releasing operation direction, and is configured to rotate together with the release gear only when the release gear rotates in the releasing operation direction to allow the claw-shaped member to rotate in the releasing operation direction.

[0012] The hook recess may be formed on an outer surface of the claw facing the striker. When the striker enters the hook recess, the claw may rotate about the rotation axis of the claw so that the claw is half-locked to the striker.

[0013] The device may further include: a semi-lock sensing sensor configured to sense a semi-lock position of the claw; and a controller configured to control the motor to rotate in a tightening operation direction when the semi-lock position is sensed.

[0014] A semi-lock sensing protrusion may be formed on a circumference of a rotation shaft of the claw, and the semi-lock sensing sensor may sense a semi-lock state according to whether the semi-lock sensing protrusion is sensed.

[0015] The first limiting protrusion may be formed on the outer surface of the claw and protrude toward the pawl unit, and the locking protrusion may be formed on the outer surface of the pawl unit and protrude toward the claw. In the semi-locked state of the claw, the locking protrusion may be caught by the first limiting protrusion, thereby limiting the rotation of the claw in the release operation direction.

[0016] The tightening protrusion may be formed on a portion of the tightening gear in a circumferential direction. A portion of the link mechanism may be located in a rotation path of the tightening protrusion, so that the tightening protrusion applies a pressing force to the link mechanism while rotating.

[0017] The connecting rod mechanism may include: a crank rod, one end of which is coupled to the first fixed hinge shaft, and the other end of which is coupled to the first rotating hinge shaft; a connector rod, one end of which is coupled to the first rotating hinge shaft, and the other end of which is coupled to the second rotating hinge shaft; and a driven rod, one end of which is coupled to the second fixed hinge shaft, and the other end of which is coupled to the second rotating hinge shaft. When the outer surface of the crank rod is pressed by the tightening protrusion, the plurality of rods may rotate, and the first rotating hinge shaft and the second rotating hinge shaft rotate around the first fixed hinge shaft and the second fixed hinge shaft.

[0018] The device may further include: a tightening rod, one end of which is coupled to the second rotating hinge shaft, and the other end of which is fixed to the tightening shaft; and a tightening spring configured to apply elastic force to the tightening rod so that the tightening shaft rotates around the second rotating hinge shaft toward the claw-shaped member. The latch protrusion may be formed on a portion of the outer surface of the claw-shaped member. During the rotation of the tightening rod toward the claw-shaped member, the tightening shaft may be caught by the latch protrusion, and the claw-shaped member may rotate to engage with the striker.

[0019] The release protrusion may be formed on a portion of the release gear in a circumferential direction. The ratchet unit may include: a ratchet, which is arranged opposite to the claw-shaped member and is configured to rotate around a rotation axis of the ratchet; and a ratchet lever, one end of which is located in a rotation path of the release protrusion to interfere with the release protrusion, and the other end of the ratchet lever is arranged at an end of the ratchet to rotate alone when the release gear rotates in a tightening operation direction, and rotate together with the ratchet when the release gear rotates in a releasing operation direction.

[0020] The device may further include: a pawl lever spring configured to apply an elastic force to the pawl lever in a direction in which the pawl lever rotates relative to the pawl alone.

[0021] A stopper may be formed between the pawl and the pawl lever. The stopper may be located in a rotation path of the pawl lever that rotates together with the pawl.

[0022] The device may further include: a fully locked sensing sensor configured to sense a fully locked position of the claw when the claw is fully locked to the striker according to a tightening operation of the motor; and a controller configured to control the motor to stop operating when the fully locked position of the claw is sensed.

[0023] A full lock sensing protrusion may be formed on a circumference of a rotation shaft of the take-up gear, and the full lock sensing sensor may sense a full lock state according to whether the full lock sensing protrusion is sensed.

[0024] The pinion gear may be fixed to the rotating shaft of the release gear. The pinion gear may be externally meshed with the tightening gear at a predetermined reduction gear ratio. When the motor rotates in the tightening operation direction and the full lock sensing sensor senses the full lock sensing protrusion that rotates according to the reduction gear ratio, it can be determined that the operation state is a full lock state.

[0025] The second limiting protrusion may be formed on the outer surface of the claw and protrude toward the pawl unit, and the locking protrusion may be formed on the outer surface of the pawl unit and protrude toward the claw. When the claw is in the fully locked position, the locking protrusion may be caught by the second limiting protrusion, thereby limiting the rotation of the claw in the release operation direction.

[0026] The locking protrusion may be formed at an upper end of the rotation axis of the pawl. The device may further include: a pawl spring configured to apply elastic force to the pawl to rotate the locking protrusion toward the claw; and a claw spring configured to apply elastic force to the claw in a direction in which the claw rotates to perform a release operation.

[0027] The device may further include an unlocking sensing sensor configured to sense an unlocking position of the pawl when the pawl lever and the pawl rotate together through the release protrusion according to the release operation of the motor and the claw-shaped piece is released from the striker. When the unlocking position is sensed, the controller may control the motor to stop operating.

[0028] The unlocking sensing protrusion may be formed on a circumference of a rotation shaft of the pawl, and the unlocking sensing sensor may sense an unlocking state according to whether the unlocking sensing protrusion is sensed.

[0029] The controller may stop the motor when the unlocking position of the pawl is sensed, and may control the motor to return to a state before the release operation when a predetermined period of time has passed after the motor is stopped.

[0030] The device may further include: a break lever, one end of which is pressed by the pawl during the release operation. The break lever can be rotated around the middle of the break lever so that the other end of the break lever pushes the tightening shaft upward to release the tightening shaft from the latch protrusion of the claw-shaped member.

[0031] When the release gear rotates in the release operation direction, the release protrusion can push the pawl lever and the pawl together, thereby pressing one end of the interruption lever.

[0032] The device may further include: an interrupting lever spring configured to apply elastic force to the interrupting lever so that one end of the interrupting lever rotates toward the pawl lever.

[0033] The device may further include: an emergency lever configured to rotate around a middle portion of the emergency lever, one end of the emergency lever being located outside the latch mechanism, and the other end of the emergency lever being located inside the pawl lever, so that the other end rotates the pawl lever in a release operation direction according to the rotation of one end. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] The above and other objects, features and other advantages of the present disclosure will be more clearly understood from the following detailed description taken in conjunction with the accompanying drawings, in which:

[0035] Figure 1 is a view showing the appearance of a latch mechanism according to the present disclosure coupled to a tailgate;

[0036] Figure 2 is a view showing the internal structure of a latch mechanism according to the present disclosure;

[0037] Figure 3is a view showing the shapes of internal components of the latch mechanism according to the present disclosure and the coupling relationship between the internal components;

[0038] Figure 4A and Figure 4B is a view for explaining a process of operating the claw according to the present disclosure to change from an unlocked state to a semi-locked state;

[0039] Figure 5A , Figure 5B and Figure 5C is a view for explaining a process of performing a tightening operation by a motor in a semi-locked state of a claw according to the present disclosure;

[0040] Fig. 6A , Figure 6B and Figure 6C It is shown FIG. 5A to FIG. 5C A view of the operation of the linkage mechanism shown;

[0041] Figure 7 is a view showing a completely locked state of the claw according to the present disclosure;

[0042] Fig. 8A and Figure 8B is a view for explaining a process of performing a release operation by a motor in a fully locked state according to the present disclosure;

[0043] Fig.9A and Fig. 9B is a view for explaining a process of performing a releasing operation by a motor during a tightening operation according to the present disclosure;

[0044] Fig.10 is a view showing a configuration in which an emergency lever according to the present disclosure is coupled to a latch mechanism;

[0045] Fig.11A and Fig. 11B is a view for explaining a process of performing a releasing operation by an emergency lever according to the present disclosure; and

[0046] Fig.12 is a block diagram schematically illustrating a configuration for sensing a locking state of a pawl and a striker according to the present disclosure. DETAILED DESCRIPTION

[0047] Hereinafter, exemplary embodiments of the present disclosure will be described with reference to the accompanying drawings.

[0048] Figure 1 is a view showing the appearance of a latch mechanism 10 according to the present disclosure coupled to a tailgate, Figure 2 is a view showing the internal structure of the latch mechanism 10 according to the present disclosure, and Figure 31 is a view showing the shapes of internal components of the latch mechanism 10 according to the present disclosure and the coupling relationship between the internal components.

[0049] 1. The present invention relates to a clutch 200, wherein the clutch 200 is engaged with the motor 100 and the clutch 200 is engaged with the motor 100 to lock the clutch 200. The clutch 200 is engaged with the motor 100 and the clutch 200 is engaged with the motor 100 to lock the clutch 200. The clutch 200 is engaged with the motor 100 and the clutch 200 is engaged with the motor 100 to lock the clutch 200. The clutch 200 is engaged with the motor 100 and the clutch 200 is engaged with the motor 100 to lock the clutch 200.

[0050] Described in detail, the motor 100, the release gear 200, the tightening gear 300, the link mechanism 400, the claw 500 and the ratchet unit are installed inside the housing to constitute the latch mechanism 10. The mounting brackets are mounted to both sides of the latch mechanism 10. The mounting brackets are bolted to the tailgate. That is, the bolts are fastened to one mounting bracket and the other mounting bracket, thereby fixing the latch mechanism 10 to the tailgate.

[0051] The motor 100 may be an actuator that performs a tightening operation and a releasing operation, and may be installed in a housing and disposed at an uppermost portion of the latch mechanism 10 .

[0052] The worm gear 110 is fixed to the shaft of the motor 100. The worm gear 110 is meshed with the release gear 200. The tightening gear 300 is meshed with the release gear 200, so that the release gear 200 and the tightening gear 300 can rotate simultaneously. These gears rotate in a forward direction or a reverse direction according to the rotation direction of the motor 100, thereby realizing the tightening operation and the releasing operation.

[0053] The link mechanism 400 is a four-link mechanism in which links (rods) are connected to each other via two rotating hinge axes and two fixed hinge axes. During the rotation of the tightening mechanism, the link (rod) connected to other links (rods) via the two rotating hinge axes contacts the tightening mechanism and is pressed by the tightening mechanism, whereby the link mechanism 400 performs reciprocating motion within a predetermined motion radius.

[0054] The claw 500 is mounted to the lower end of the link mechanism 400 and is rotatable about a rotation axis coupled to the middle of the claw 500. A hook recess 510 is formed in a portion of the outer surface of the lower end of the claw 500. The striker 20 is engaged in the hook recess 510.

[0055] In addition, a plurality of protrusion structures are formed on the outer surface of the claw 500. The protrusion structures are caught by the link mechanism 400 or the pawl unit according to the engagement state between the claw 500 and the striker 20, thereby allowing or restricting the claw 500 from rotating. The protrusion structures will be described in detail later.

[0056] The pawl unit is installed opposite to the claw 500. The pawl unit is elongated in the vertical direction. A rotating shaft is provided at the lower end of the pawl unit so that the upper part of the rotating shaft can rotate in the direction toward the claw 500. The pawl unit includes a pawl 600 and a pawl rod 700.

[0057] Therefore, when the latch mechanism 10 operates, the pawl unit is caught by or released from the claw 500 , thereby restricting or allowing the claw 500 to rotate.

[0058] The upper end of the ratchet unit is located within the rotation radius of the release gear 200, so when the release gear 200 rotates, the upper end of the ratchet unit is caught by the release gear 200. Specifically, when the release gear 200 rotates in the tightening operation direction, the upper end of the ratchet unit that interferes with the release gear 200 rotates alone, thereby maintaining the state in which the ratchet unit restricts the rotation of the claw 500.

[0059] In contrast, when the release gear 200 rotates in the release operation direction, the upper end of the pawl unit interferes with the release gear 200 and the entire remaining portion of the pawl unit rotates about the rotation axis, thereby switching to a state in which the pawl unit allows the claw 500 to rotate.

[0060] That is, in the tightening operation, the motor 100 rotates in one direction so that the release gear 200 rotates in the forward direction, and the tightening gear 300 rotates in the reverse direction, so that the tightening gear 300 presses the link mechanism 400. However, in this case, when the release gear 200 rotates in the forward direction, the upper end portion of the pawl unit rotates alone, and the lower end portion of the pawl unit does not change the rotation position.

[0061] Therefore, when the link mechanism 400 moves, the link mechanism 400 is caught by the claw 500 , and thus the claw 500 rotates so that the hook recess 510 in the claw 500 faces the striker 20 .

[0062] Therefore, the striker 20 is fully engaged in the hook recess 510 , and the protrusion structure of the claw 500 is caught by the pawl unit, so the claw 500 and the striker 20 are completely locked.

[0063] On the other hand, in the releasing operation, the motor 100 is rotated in the reverse direction so that the releasing gear 200 is rotated in the reverse direction.

[0064] When the release gear 200 rotates in the reverse direction, not only the upper end portion of the pawl unit but also the entire remaining portion of the pawl unit rotates, so that the pawl unit is separated from the claw 500 .

[0065] Therefore, the claw 500 rotates so that the hook recess 510 in the claw 500 is separated from the striker 20. Therefore, the striker 20 is released from the hook recess 510. Finally, the claw 500 and the striker 20 are unlocked.

[0066] As described above, according to the present disclosure, a single motor 100 can be used to perform tightening and releasing operations instead of separately installing a motor for tightening and a motor for releasing operations, thereby reducing the number of components, thereby reducing the manufacturing cost and weight of the device and improving the operability of the device.

[0067] Figure 4A and Figure 4B 1 is a view for explaining a process of operating the claw 500 according to the present disclosure to change from an unlocked state to a semi-locked state.

[0068] Referring to the drawings, a hook recess 510 is formed in an outer surface of the claw 500 facing the striker 20. When the striker 20 enters the hook recess 510, the claw 500 rotates about its rotation axis so that the striker 20 is half-locked to the hook recess 510.

[0069] To this end, the position of the rotation axis of the claw-shaped member 500 in the left-right direction needs to be spaced a predetermined distance from the position of the striker 20 in the left-right direction, and the position of the entrance of the hook recess 510 in the left-right direction needs to be consistent with the position of the striker 20 in the left-right direction in the unlocked state.

[0070] That is, when the tailgate is closed in an unlocked state in which the tailgate is opened, the tailgate moves downward, and an upper surface of an entrance of the hook recess 510 in the claw 500 is pressed by the striker 20 due to the weight of the tailgate.

[0071] Therefore, the claw 500 is rotated about the rotation axis of the claw 500 by the pressing force of the striker 20 , and the striker 20 enters the hook recess 510 and is half-locked to the hook recess 510 .

[0072] In the present disclosure, when the above-mentioned semi-locked state is sensed, a tightening operation is performed.

[0073] To this end, the present disclosure further includes: a semi-lock sensing sensor 520 ( Fig.10 and the controller CRL, when the semi-locked position is sensed, controls the motor 100 to rotate in the tightening operation direction.

[0074] Reference Fig.10 and Fig.12 , a semi-lock sensing protrusion 530 is formed on the circumference of the rotation axis of the claw 500 , and the semi-lock sensing sensor 520 senses the semi-lock state according to whether the semi-lock sensing protrusion 530 is sensed.

[0075] For example, a semi-lock sensing protrusion 530 having an arc shape is formed on the circumference of the rotation axis of the claw 500 , and the semi-lock sensing sensor 520 is disposed beside the semi-lock sensing protrusion 530 .

[0076] When the semi-lock sensing sensor 520 senses the semi-lock sensing protrusion 530 , the operation state is determined to be the semi-lock state, and when the semi-lock sensing sensor 520 does not sense the semi-lock sensing protrusion 530 , the operation state is determined to be a state other than the semi-lock state.

[0077] Of course, the structure for sensing the semi-locked state is not limited to the semi-locked sensing protrusion 530. Alternatively, the semi-locked state may be sensed by sensing the movement of a specific component other than the semi-locked sensing protrusion 530.

[0078] For reference, the controller CRL according to an exemplary embodiment of the present disclosure can be implemented by a processor (not shown) and a non-volatile memory (not shown), the processor being configured to perform the operations to be described below using data stored in the corresponding memory, and the non-volatile memory being configured to store data related to an algorithm for controlling the operation of various components of the vehicle or software commands for executing the algorithm. Here, the memory and the processor can be implemented as separate chips. Alternatively, the memory and the processor can be implemented as a single integrated chip. Alternatively, the processor can take the form of one or more processors.

[0079] In addition, the present disclosure may be configured to prevent the claw 500 from rotating in a direction in which the striker 20 is released from the claw 500 in the semi-locked state.

[0080] Reference Figure 4B, a first limiting protrusion 540 is formed on the outer surface of the claw 500 and protrudes toward the pawl unit, and a locking protrusion 610 is formed on the outer surface of the pawl unit and protrudes toward the claw 500. In the semi-locked state of the claw 500, the locking protrusion 610 is caught by the first limiting protrusion 540, thereby limiting the rotation of the claw 500 in the release operation direction.

[0081] For example, a first limiting protrusion 540 having a step-like shape is formed on the outer surface of the claw 500 at a position spaced apart from the hook recess 510 in the claw 500 in the direction in which the claw 500 rotates to perform the tightening operation.

[0082] The pawl unit includes a pawl 600 formed at a lower end of the pawl unit and a pawl lever 700 formed at an upper end of the pawl unit. A locking protrusion 610 is formed on one surface of the pawl 600 facing the claw 500 and protrudes toward the claw 500.

[0083] That is, in the semi-locked state, the locking protrusion 610 formed on the pawl 600 is caught by the first limiting protrusion 540 formed on the claw 500 , thereby preventing the claw 500 from rotating in the release operation direction.

[0084] FIG. 5A to FIG. 5C 1 is a view for explaining a process of performing a tightening operation by the motor 100 in a semi-locked state of the claw 500 according to the present disclosure.

[0085] Referring to the drawings, the tightening protrusion 310 is formed on a portion of the circumferential direction of the tightening gear 300. The link mechanism 400 ( Fig. 6A A portion of the rotatable projection 310 (as shown) is located in the rotation path of the tightening protrusion 310, so that the tightening protrusion 310 applies a pressing force to the link mechanism 400 while rotating.

[0086] For example, the tightening protrusion 310 having a circular shape may protrude from one surface of the tightening gear 300 to press the link mechanism 400 while the tightening gear 300 is rotated.

[0087] That is, when the release gear 200 rotates in the forward direction according to the operation of the motor 100, the tightening gear 300 rotates in the reverse direction, and the tightening protrusion 310 pushes the link mechanism 400 located in the rotation path of the tightening protrusion 310 toward the claw 500. Therefore, the link mechanism 400 moves while rotating within a predetermined movement radius thereof.

[0088] FIG. 6A to FIG. 6C It is shown FIG. 5A to FIG. 5C1 and 2. The operation of the link mechanism 400 is shown in FIG. 1. The structure of the link mechanism 400 is described in detail, and the link mechanism 400 includes: a crank rod 410, one end of which is coupled to the first fixed hinge shaft hf1, and the other end of which is coupled to the first rotating hinge shaft hr1; a connector rod 420, one end of which is coupled to the first rotating hinge shaft hr1, and the other end of which is coupled to the second rotating hinge shaft hr2; and a driven rod 430, one end of which is coupled to the second fixed hinge shaft hf2, and the other end of which is coupled to the second rotating hinge shaft hr2.

[0089] When the outer surface of the crank rod 410 is pressed by the tightening protrusion 310, the first and second rotating hinge axes hr1 and hr2 rotate around the first and second fixed hinge axes hf1 and hf2. In this way, the plurality of rods rotate.

[0090] For this purpose, when the link mechanism 400 operates, while the first and second fixed hinge axes hf1 and hf2 are fixed in place, the first and second rotating hinge axes hr1 and hr2 move and change positions in conjunction with the movement of the plurality of rods.

[0091] In particular, since the crank rod 410 is pressed in a state of being in contact with the tightening protrusion 310 , the crank rod 410 may be formed such that the total length of the crank rod 410 extends to the maximum radial position of the tightening protrusion 310 .

[0092] Furthermore, one surface of the crank rod 410 that contacts the tightening protrusion 310 is formed in a concave arc shape, whereby the tightening protrusion 310 can smoothly slide along the crank rod 410 .

[0093] In addition, refer to FIG. 5A to FIG. 5C The present disclosure further includes: a tightening rod 440, one end of which is connected to the second rotating hinge axis hr2, and the other end of the tightening rod 440 is fixed to the tightening shaft 442; and a tightening spring 450, which applies an elastic force to the tightening rod 440 so that the tightening shaft 442 rotates around the second rotating hinge axis hr2 toward the claw-shaped member 500.

[0094] The latch protrusion 550 is formed on a portion of the outer surface of the claw 500. In the process of the tightening lever 440 rotating toward the claw 500, the tightening shaft 442 is caught by the latch protrusion 550, whereby the claw 500 rotates to engage with the striker 20.

[0095] For example, a latch protrusion 550 having a step-like shape is formed on the outer surface of the claw 500 at a position opposite to the hook recess 510 in the claw 500 .

[0096] The tightening spring 450 may be a torsion spring and is arranged around the second fixed hinge axis hf2 as the rotation axis of the claw 500 so that one end of the tightening spring 450 is supported by the housing of the latch mechanism 10 and the other end of the tightening spring 450 is clamped by the tightening rod 440 adjacent to the tightening shaft 442.

[0097] When the claw 500 rotates in the tightening operation direction, the tightening shaft 442 moves toward the claw 500 by the elastic force of the tightening spring 450, and is then caught by the latch protrusion 550 formed on the claw 500. In this state, since the tightening gear 300 further rotates in the tightening operation direction, the tightening shaft 442 rotates the claw 500.

[0098] When the take-up shaft 442 is released from the latch protrusion 550 , the take-up spring 450 applies elastic force to the link mechanism 400 , so that the link mechanism 400 returns toward the take-up gear 300 .

[0099] Fig. 8A and Figure 8B 1 is a view for explaining a process of performing a releasing operation by the motor 100 in a fully locked state according to the present disclosure.

[0100] Referring to the drawings, a release protrusion 210 is formed on a portion of the release gear 200 in a circumferential direction.

[0101] The pawl unit includes: a pawl 600, which is arranged opposite to the claw-shaped member 500 and is configured to rotate around the rotation axis of the pawl 600; and a pawl rod 700, one end of which is located in the rotation path of the release protrusion 210 to interfere with the release protrusion 210, and the other end of the pawl rod 700 is arranged at the end of the pawl 600 to rotate independently when the release gear 200 rotates along the tightening operation direction and rotate together with the pawl 600 when the release gear 200 rotates along the releasing operation direction.

[0102] For example, the release protrusion 210 is formed on a portion of one surface of the release gear 200 and forms a predetermined rotation path when the release gear 200 rotates.

[0103] The ratchet lever 700 is located within the rotation radius of the release gear 200. The ratchet lever 700 does not rotate in the release operation direction based on the upper end of the ratchet 600, but rotates only in the tightening operation direction.

[0104] That is, when the release gear 200 rotates in the release operation direction, the release protrusion 210 is caught by the pawl lever 700 , whereby the pawl 600 and the pawl lever 700 rotate together about the rotation axis of the pawl 600 .

[0105] Of course, when the release gear 200 is rotated in the tightening operation direction, the release protrusion 210 is caught by the ratchet lever 700. However, the ratchet lever 700 is rotated alone, and the ratchet 600 is not rotated.

[0106] Reference Fig.10 The present disclosure may further include: a pawl lever spring 710 , which applies elastic force to the pawl lever 700 along the direction in which the pawl lever 700 rotates independently relative to the pawl 600 .

[0107] For example, the pawl lever spring 710 may be a torsion spring. The pawl lever spring 710 is disposed around a rotation axis connecting the pawl lever 700 and the pawl 600, and always applies elastic force to the pawl lever 700 in a direction in which the pawl lever 700 rotates for a release operation.

[0108] Reference Fig. 8A and Figure 8B A stopper 620 is formed between the pawl 600 and the pawl lever 700. The stopper 620 may be located in a rotation path of the pawl lever 700 that rotates together with the pawl 600.

[0109] For example, a stopper 620 having a triangular shape is formed on one surface of a rotation shaft coupled to the upper end of the pawl 600. In the release rotation of the release protrusion 210, when the release protrusion 210 pushes the pawl lever 700, the pawl lever 700 is caught by the stopper 620 and thus cannot rotate alone. Therefore, the pawl 600 rotates together with the pawl lever 700.

[0110] According to the present disclosure, when the claw 500 is completely locked to the striker 20 , the operation of the motor 100 stops.

[0111] To this end, the present disclosure further includes: a fully locked sensing sensor 320, which senses the fully locked position of the claw 500 when the claw 500 is fully locked to the striker 20 according to the tightening operation of the motor 100; and a controller CRL, which controls the motor 100 to stop operating when the fully locked position of the claw 500 is sensed.

[0112] Reference Fig.10 and Fig.12 A fully locked sensing protrusion 330 is formed on the circumference of the rotation axis of the take-up gear 300. The fully locked sensing sensor 320 senses a fully locked state according to whether the fully locked sensing protrusion 330 is sensed.

[0113] For example, a full lock sensing protrusion 330 having a triangular shape is formed on a portion of the circumference of the rotation shaft of the take-up gear 300 , and the full lock sensing sensor 320 is disposed beside the full lock sensing protrusion 330 .

[0114] When the full lock sensing sensor 320 senses the full lock sensing protrusion 330 , the operation state is determined to be the full lock state, and when the full lock sensing sensor 320 does not sense the full lock sensing protrusion 330 , the operation state is determined to be a state other than the full lock state.

[0115] Of course, the structure for sensing the fully locked state is not limited to the fully locked sensing protrusion 330. Alternatively, the fully locked state may be sensed by sensing the movement of a specific component other than the fully locked sensing protrusion 330.

[0116] In addition, the pinion 220 ( Fig.11A The motor 100 is fixed to the rotating shaft of the release gear 200 (as shown). The pinion 220 is externally meshed with the tightening gear 300 at a predetermined reduction gear ratio. When the motor 100 rotates in the tightening operation direction and the full lock sensing sensor 320 senses the full lock sensing protrusion 330 rotating according to the reduction gear ratio, it is determined that the operation state is the full lock state.

[0117] For example, the gear ratio of the pinion gear 220 and the take-up gear 300 may be 3: 1. When the pinion gear 220 rotates three times, the take-up gear 300 rotates one time.

[0118] That is, only one fully locked sensing protrusion 330 for sensing the fully locked state is formed on the rotation axis of the tightening gear 300. To this end, the present disclosure is configured such that the tightening gear 300 rotates only one circle from the starting point corresponding to the semi-locked state to the end point corresponding to the fully locked state.

[0119] As described above, by appropriately setting the gear ratio between the pinion gear 220 and the take-up gear 300 , the fully locked state can be sensed using only one fully locked sensing protrusion 330 .

[0120] Figure 7 is a view showing a completely locked state of the claw 500 according to the present disclosure.

[0121] Referring to the drawings, the second limiting protrusion 560 ( Figure 5B The second locking protrusion 560 is formed on the outer surface of the claw 500 and protrudes toward the pawl unit, and the locking protrusion 610 is formed on the outer surface of the pawl unit and protrudes toward the claw 500. When the claw 500 is located at the fully locked position, the locking protrusion 610 is caught by the second limiting protrusion 560, thereby limiting the rotation of the claw 500 in the release operation direction.

[0122] For example, a second restricting protrusion 560 having a stepped shape is formed on the outer surface of the claw 500 at a position spaced apart from the hook recess 510 in the direction in which the claw 500 rotates to perform the tightening operation. The second restricting protrusion 560 is formed between the first restricting protrusion 540 and the hook recess 510.

[0123] The locking protrusion 610 is formed on one surface of the pawl 600 facing the claw 500 and protrudes toward the claw 500 .

[0124] That is, in the fully locked state, the locking protrusion 610 formed on the pawl 600 is caught by the second limiting protrusion 560 formed on the claw 500 , thereby preventing the claw 500 from rotating in the release operation direction in the state of being fully locked to the striker 20 .

[0125] The locking protrusion 610 is formed at the upper end of the rotation axis of the pawl 600. In addition, the present disclosure further includes: a pawl spring 630, which applies elastic force to the pawl 600 to rotate the locking protrusion 610 toward the claw 500; and a claw spring 570 ( Fig.10 As shown), an elastic force is applied to the claw-shaped member 500 in the direction in which the claw-shaped member 500 rotates to perform a releasing operation.

[0126] For example, Fig.10 As shown, the pawl spring 630 may be a torsion spring. The pawl spring 630 is arranged around the rotation axis of the pawl 600 so that one end of the pawl spring 630 is supported by the housing of the latch mechanism 10 and the other end of the pawl spring 630 is clamped by the upper end of the pawl 600.

[0127] Therefore, the pawl spring 630 always applies elastic force to the pawl 600 to rotate the upper end of the pawl 600 toward the claw 500. Therefore, the locking protrusion 610 remains in a state of being caught by the first and second limiting protrusions 540 and 560 of the claw 500, thereby limiting the rotation of the claw 500 in the release operation direction.

[0128] In addition, the claw spring 570 may be a torsion spring. The claw spring 570 is arranged around the second fixed hinge axis hf2 as the rotation axis of the claw 500 so that one end of the claw spring 570 is supported by the housing of the latch mechanism 10 and the other end of the claw spring 570 is caught by the claw 500.

[0129] Therefore, the claw spring 570 always applies elastic force to the claw 500 to rotate the claw 500 in the release operation direction. Therefore, in a state where the first limiting protrusion 540 and the second limiting protrusion 560 are caught by the locking protrusion 610 of the pawl 600, the claw spring 570 stably maintains the engaged state of the claw 500. In a state where the first limiting protrusion 540 and the second limiting protrusion 560 are released from the locking protrusion 610 of the pawl 600, the claw spring 570 rotates the claw 500 in the release operation direction, so that the claw 500 returns to the unlocked state.

[0130] Reference Fig. 8A , Figure 8B , Fig.10 and Fig.12 , the present disclosure further includes an unlocking sensing sensor 640, which senses an unlocking position of the pawl 600 when the pawl lever 700 and the pawl 600 rotate together through the release protrusion 210 according to the release operation of the motor 100 and the claw 500 is released from the striker 20. Therefore, when the unlocking position is sensed, the controller CRL can control the motor 100 to stop operating.

[0131] Specifically, the unlocking sensing protrusion 650 is formed on the circumference of the rotation axis of the pawl 600 , and the unlocking sensing sensor 640 senses the unlocking state according to whether the unlocking sensing protrusion 650 is sensed.

[0132] For example, an unlocking sensing protrusion 650 having an arc shape is formed on the circumference of the rotation axis of the pawl 600 , and the unlocking sensing sensor 640 is disposed beside the unlocking sensing protrusion 650 .

[0133] When the unlock sensing sensor 640 senses the unlock sensing protrusion 650 , it is determined that the operation state is the unlock state, and when the unlock sensing sensor 640 does not sense the unlock sensing protrusion 650 , it is determined that the operation state is a state other than the unlock state.

[0134] For reference, a state in which the unlock sensing sensor 640 senses the unlock state may be a state in which the release protrusion 210 rotates in the release operation direction so that the pawl lever 700 and the pawl 600 rotate together and the outer periphery of the release protrusion 210 contacts the pawl lever 700 .

[0135] Of course, the structure for sensing the unlocking state is not limited to the unlocking sensing protrusion 650. Alternatively, the unlocking state may be sensed by sensing the movement of a specific component other than the unlocking sensing protrusion 650.

[0136] The controller CRL may stop the motor 100 when sensing the unlock position of the pawl 600 , and may control the motor 100 to return to a state before the release operation when a predetermined period of time elapses after stopping the motor 100 .

[0137] That is, after stopping the motor 100, the controller CRL maintains the state in which the release protrusion 210 pushes the pawl lever 700 for a predetermined period of time, thereby generating a state in which the movement of the claw 500 is not restricted by the pawl 600. Therefore, even if the tailgate descends toward the striker 20 due to its own weight, the claw 500 does not engage with the striker 20 again, thereby preventing the claw 500 from being accidentally locked.

[0138] Fig.9A and Fig. 9B 1 is a view for explaining a process of performing a releasing operation by the motor 100 during a tightening operation according to the present disclosure.

[0139] Referring to the accompanying drawings, the present disclosure may further include: an interrupting rod 800, one end of which is pressed by the pawl 600 during the releasing operation, and the interrupting rod 800 is configured to rotate around the middle part of the interrupting rod 800, so that the other end of the interrupting rod 800 pushes the tightening shaft 442 upward to release the tightening shaft 442 from the latch protrusion 550 of the claw-shaped member 500.

[0140] For example, a rotation axis provided in the middle of the interrupting lever 800 is coupled to the first fixed hinge axis hf1, and one end of the interrupting lever 800 is bent upward to be located in a path where the upper end of the pawl 600 rotates in the release operation direction.

[0141] Therefore, when the release gear 200 is rotated in the release operation direction, the release protrusion 210 pushes the pawl lever 700 and the pawl 600 together, thereby pressing one end of the interruption lever 800 .

[0142] In the fully locked state of the claw 500 and the striker 20 , the other end of the interrupting lever 800 is located below the latching protrusion 550 .

[0143] That is, when a release signal is applied during the tightening operation performed by the motor 100 , the release protrusion 210 rotates in the release operation direction, thereby rotating the pawl lever 700 and the pawl 600 together.

[0144] Therefore, the upper end of the pawl 600 presses one end of the interruption lever 800, so that the other end of the interruption lever 800 is lifted upward around the middle of the interruption lever 800 and pushes the tightening shaft 442 upward, whereby the tightening shaft 442 is released from the latch protrusion 550 of the claw-shaped member 500.

[0145] Therefore, the claw 500 is rotated to be unlocked by the elastic force of the claw spring 570 , and is released from the striker 20 .

[0146] In addition, the present disclosure may further include: an interruption lever spring 810 , applying elastic force to the interruption lever 800 , so that one end of the interruption lever 800 rotates toward the pawl lever 700 .

[0147] That is, after the claw 500 is released from the striker 20 by the operation of the interrupting lever 800 pushing the take-up shaft 442 , the interrupting lever 800 is rotated to the original position of the interrupting lever 800 by the interrupting lever spring 810 .

[0148] Fig.10 is a view showing a configuration in which an emergency lever according to the present disclosure is coupled to a latch mechanism 10, and Fig.11A and Fig. 11B 1 is a view for explaining a process in which the emergency lever according to the present disclosure performs a releasing operation.

[0149] Referring to the accompanying drawings, the present disclosure further includes an emergency lever 900 configured to rotate around a middle portion of the emergency lever 900, one end of the emergency lever 900 being located outside the latch mechanism 10, and the other end of the emergency lever 900 being located inside the pawl lever 700, so that the other end rotates the pawl lever 700 in a release operation direction according to the rotation of one end.

[0150] That is, when a release operation is performed by manually operating the emergency lever 900 during a tightening operation by the motor 100 , the other end of the emergency lever 900 rotates the pawl lever 700 in a release operation direction, whereby the pawl 600 rotates together with the pawl lever 700 .

[0151] Therefore, the upper end of the ratchet 600 presses one end of the interruption lever 800, so that the other end of the interruption lever 800 is lifted up around the middle of the interruption lever 800 and pushes the tightening shaft 442 upward. Thereby, the tightening shaft 442 is released from the latch protrusion 550 of the claw 500.

[0152] Therefore, the claw 500 is rotated to be unlocked by the elastic force of the claw spring 570 , and is released from the striker 20 .

[0153] Electric tightening operation

[0154] Hereinafter, a process of performing an electric tightening operation using the motor 100 after changing from the unlocked state to the semi-locked state will be described.

[0155] exist Figure 4A In the unlocked state, when the tailgate moves downward in the closing direction, the upper surface of the entrance of the hook recess 510 in the claw 500 is pressed by the striker 20 due to the weight of the tailgate.

[0156] Then, if Figure 4BAs shown, the claw 500 rotates about the rotation axis by the pressing force applied to the claw 500 by the striker 20. Therefore, the striker 20 enters the hook recess 510, and the locking protrusion 610 is caught by the first limiting protrusion 540, thereby limiting the rotation of the claw 500. Thus, the striker 20 is half-locked to the hook recess 510.

[0157] In this semi-locked state, Figure 5A As shown, the motor 100 rotates to rotate the release protrusion 210 in a clockwise direction, thereby rotating the tightening gear 300 in a counterclockwise direction.

[0158] Therefore, the tightening protrusion 310 also rotates and presses the crank rod 410 downward, whereby the link mechanism 400 rotates.

[0159] In particular, during the process of the link mechanism 400 rotating and moving downward, the tightening rod 440 has a clockwise torque due to the elastic force of the tightening spring 450, so that the tightening shaft 442 connected to the tightening rod 440 is caught and restricted by the latch protrusion 550 formed on the claw 500.

[0160] In this state, if Figure 5B As shown, the take-up gear 300 further rotates and presses the crank rod 410, so that the take-up shaft 442 rotates the claw 500 in the counterclockwise direction.

[0161] At this time, the release protrusion 210 formed on the release gear 200 pushes the ratchet lever 700. However, since the release protrusion 210 rotates in the clockwise direction as the tightening operation direction, the ratchet 600 does not rotate, and only the ratchet lever 700 rotates.

[0162] like Figure 5C As shown, when the tightening gear 300 rotates one circle in the counterclockwise direction during the tightening operation, the claw 500 rotates beyond the fully locked point. At this time, the pawl 600 rotates by the elastic force of the pawl spring 630 to limit the movement of the claw 500.

[0163] Subsequently, when the tightening protrusion 310 is further rotated and no longer presses the crank rod 410, the connecting rod mechanism 400 and the claw member 500 are rotated to their original positions by the elastic force of the tightening spring 450 and the claw member spring 570. Figure 7 As shown, the locking protrusion 610 formed on the pawl 600 is caught by the second limiting protrusion 560 of the claw 500, thereby maintaining the fully locked state.

[0164] Upon sensing the fully locked state, the controller CRL stops the motor 100 , thereby completing the electric tightening operation.

[0165] Electric release operation

[0166] Next, a process of performing an electric release operation using the motor 100 in the fully locked state will be described.

[0167] When Figure 7 When a release signal is applied in the fully locked state, Fig. 8A As shown, the motor 100 rotates to rotate the release gear 200 in a counterclockwise direction.

[0168] Therefore, the release protrusion 210 rotates in the counterclockwise direction together with the release gear 200 and pushes the pawl lever 700. At this time, the pawl lever 700 rotates about the rotation axis together with the pawl 600 through the stopper 620.

[0169] Then, the locking protrusion 610 of the pawl 600 is released from the second restricting protrusion 560 of the claw 500 , and the claw 500 is released.

[0170] Therefore, the claw 500 is rotated in the clockwise direction as the unlocking direction by the elastic force of the claw spring 570, and the striker 20 is released from the claw 500. Therefore, the striker 20 is unlocked from the claw 500.

[0171] At this time, upon sensing the unlocked state, the controller CRL stops the motor 100 and maintains a state in which the release protrusion 210 pushes the pawl lever 700 for a predetermined period of time.

[0172] The reason for doing this is to prevent the claw 500 from being locked to the striker 20 again if the tailgate is lowered due to its own weight.

[0173] Then, after a predetermined period of time during which the tailgate can be moved to the open position, if Figure 8B As shown, the motor 100 is operated to rotate the release gear 200 in the clockwise direction to the initial position of the release gear 200. As a result, the release protrusion 210 is separated from the pawl lever 700, and the pawl 600 is rotated toward the claw 500 by the pawl spring 630 and returns.

[0174] At this time, upon sensing the return of the pawl 600 , the controller CRL stops the motor 100 , thereby completing the release operation.

[0175] Electric interruption release operation

[0176] Next, operations performed using the motor 100 when a release signal is applied to the controller CRL during an electric tightening operation will be described.

[0177] When Figure 5C When a release signal is sensed during the electric tightening operation shown, Fig.9AAs shown, the motor 100 is operated in reverse to rotate the release gear 200 in the counterclockwise direction.

[0178] Therefore, the release protrusion 210 rotates counterclockwise with the release gear 200 and pushes the pawl lever 700. At this time, the pawl lever 700 rotates about the rotation axis with the pawl 600 through the stopper 620. In particular, the pawl 600 rotating with the pawl lever 700 pushes the interruption lever 800 to rotate the interruption lever 800.

[0179] Then, the other end of the interruption lever 800 is rotated to lift up the take-up shaft 442. Thus, the take-up shaft 442 is released from the latch protrusion 550, and thus the claw 500 is released.

[0180] Therefore, the claw 500 is rotated in the clockwise direction as the unlocking direction by the elastic force of the claw spring 570, and the striker 20 is released from the claw 500. Therefore, the striker 20 is unlocked from the claw 500.

[0181] At this time, upon sensing the unlocked state, the controller CRL stops the motor 100 and maintains a state in which the release protrusion 210 pushes the pawl lever 700 for a predetermined period of time.

[0182] The reason for doing this is to prevent the claw 500 from being locked to the striker 20 again if the tailgate is lowered due to its own weight.

[0183] Then, after a predetermined period of time during which the tailgate can be moved to the open position, if Fig. 9B As shown, the motor 100 is operated to rotate the release gear 200 in the clockwise direction to the initial position of the release gear 200. As a result, the release protrusion 210 is separated from the pawl lever 700, and the pawl 600 is rotated toward the claw 500 by the pawl spring 630 and returns.

[0184] At this time, upon sensing the return of the pawl 600 , the controller CRL stops the motor 100 , thereby completing the release operation.

[0185] Manually interrupt the release operation

[0186] Next, a process of performing a manual releasing operation using the emergency lever 900 during an electric tightening operation using the motor 100 will be described.

[0187] When Figure 5C When the emergency lever 900 is operated during the electric tightening operation shown, as shown in FIG. Fig.11A As shown, the other end of the emergency lever 900 directly rotates the ratchet lever 700 in the clockwise direction.

[0188] At this time, the pawl lever 700 rotates around the rotation axis together with the pawl 600 through the stopper 620. In particular, the pawl 600 rotating together with the pawl lever 700 pushes the interruption lever 800 to rotate the interruption lever 800.

[0189] Then, the other end of the interruption lever 800 is rotated to lift up the take-up shaft 442. Thus, the take-up shaft 442 is released from the latch protrusion 550, and thus the claw 500 is released.

[0190] Therefore, the claw 500 is rotated in the clockwise direction as the unlocking direction by the elastic force of the claw spring 570, and the striker 20 is released from the claw 500. Therefore, the striker 20 is unlocked from the claw 500, and the releasing operation is completed.

[0191] As is apparent from the above description, according to the present disclosure, a tightening operation and a releasing operation can be performed using one motor, instead of separately installing a motor for the tightening operation and a motor for the releasing operation, thereby reducing the number of components, thereby reducing the manufacturing cost and weight of the device and improving the operability of the device. Therefore, the defect rate of the device can be reduced, thereby reducing field claims.

[0192] Although exemplary embodiments of the present disclosure have been disclosed for illustrative purposes, those skilled in the art will appreciate that various modifications, additions and substitutions are possible, without departing from the scope and spirit of the present disclosure as disclosed in the accompanying claims.

Claims

1. A tailgate opening and closing device, comprising: A release gear is rotated forward and reverse by a motor to perform tightening and releasing operations; A tightening gear meshing with the release gear to rotate; a link mechanism that receives a force from the tightening gear to rotate toward the claw when the tightening gear rotates during the tightening operation; the claw member being caught by and rotating with the linkage mechanism rotating during the tightening operation so as to engage with the striker pin; a pawl unit, the pawl unit comprising a pawl, arranged opposite to the claw-shaped member and rotating about a rotation axis of the pawl, the pawl unit being caught by the claw-shaped member when the claw-shaped member is engaged with the striker to restrict the claw-shaped member from rotating in a release operation direction, and the pawl unit rotating together with the release gear to allow the claw-shaped member to rotate in the release operation direction only when the release gear rotates in the release operation direction, and A break lever, one end of which is pressed by the ratchet during the release operation, rotates about the middle of the break lever so that the other end of the break lever pushes the take-up shaft upward to release the take-up shaft from the latch protrusion of the claw-shaped member.

2. The device according to claim 1, wherein: A hook recess is formed on an outer surface of the claw member facing the striker, and When the striker enters the inside of the hook recess, the claw is rotated about the rotation axis of the claw so that the claw is half-locked to the striker.

3. The device according to claim 2, further comprising: a semi-locking sensing sensor for sensing a semi-locking position of the claw; as well as The controller controls the motor to rotate in a tightening operation direction when the semi-locking position is sensed.

4. The device according to claim 3, wherein: A semi-lock sensing protrusion is formed on the circumference of the rotation axis of the claw, and The semi-lock sensing sensor senses a semi-lock state according to whether the semi-lock sensing protrusion is sensed.

5. The device according to claim 1, wherein A tightening protrusion is formed on a portion of the tightening gear in the circumferential direction, and A portion of the link mechanism is located in a rotation path of the tightening protrusion, so that the tightening protrusion applies a pressing force to the link mechanism while rotating.

6. The device according to claim 5, wherein: The connecting rod mechanism comprises: a crank rod, one end of which is coupled to the first fixed hinge shaft, and the other end of which is coupled to the first rotating hinge shaft; a connector rod having one end coupled to the first rotary hinge shaft and another end coupled to the second rotary hinge shaft; and A driven rod, one end of which is connected to the second fixed hinge shaft, and the other end of which is connected to the second rotating hinge shaft, When the outer surface of the crank rod is pressed by the tightening protrusion, the plurality of rods rotate, and the first rotating hinge axis and the second rotating hinge axis rotate around the first fixed hinge axis and the second fixed hinge axis, respectively.

7. The device according to claim 6, further comprising: a tightening rod, one end of which is coupled to the second rotating hinge shaft, and the other end of which is fixed to the tightening shaft; as well as A tightening spring applies elastic force to the tightening rod, so that the tightening shaft rotates around the second rotating hinge shaft toward the claw-shaped member, wherein a latching protrusion is formed on a portion of an outer surface of the claw, and When the take-up lever is rotated toward the claw, the take-up shaft is caught by the latch protrusion, and the claw rotates to engage with the striker.

8. The device according to claim 6, wherein: A release protrusion is formed on a portion of the release gear in a circumferential direction, and The pawl unit includes: a pawl rod, one end of which is located in the rotation path of the release protrusion to interfere with the release protrusion, and the other end of the pawl rod is arranged at the end of the pawl to rotate independently when the release gear rotates along the tightening operation direction, and rotate together with the pawl when the release gear rotates along the release operation direction.

9. The device according to claim 8, wherein: A stopper is formed between the pawl and the pawl lever, and The stopper is located in a rotational path of the pawl lever that rotates together with the pawl.

10. The apparatus according to claim 8, further comprising: a fully locked sensing sensor that senses a fully locked position of the claw when the claw is fully locked to the striker in accordance with a tightening operation of the motor; as well as The controller controls the motor to stop operating when sensing the fully locked position of the claw.

11. The device according to claim 10, wherein: A full lock sensing protrusion is formed on the circumference of the rotation shaft of the tightening gear, and The full lock sensing sensor senses a full lock state according to whether the full lock sensing protrusion is sensed.

12. The device according to claim 11, wherein A pinion gear is fixed to the rotating shaft of the release gear. The pinion gear is externally meshed with the take-up gear at a predetermined reduction gear ratio, and When the motor rotates in the tightening operation direction and the full lock sensing sensor senses the full lock sensing protrusion rotating according to the reduction gear ratio, the device is in the full lock state.

13. The apparatus according to claim 8, further comprising: an unlock sensing sensor for sensing an unlock position of the pawl when the pawl lever and the pawl are rotated together by the release protrusion according to a release operation of the motor and the claw is released from the striker, When the unlocking position is sensed, the controller controls the motor to stop operating.

14. The device according to claim 13, wherein: An unlocking sensing protrusion is formed on the circumference of the rotation axis of the pawl, and The unlock sensing sensor senses an unlock state according to whether the unlock sensing protrusion is sensed.

15. The device according to claim 13, wherein: The controller stops the motor when the unlocking position of the pawl is sensed, and controls the motor to return to a state before the release operation when a predetermined period of time elapses after the motor is stopped.

16. The device according to claim 8, wherein When the release gear rotates in the release operation direction, the release protrusion pushes the pawl lever and the pawl together, thereby pressing one end of the interruption lever.

17. The apparatus according to claim 1, further comprising: An emergency lever rotates around the middle of the emergency lever, one end of the emergency lever is located outside the latch mechanism, and the other end of the emergency lever is located inside the pawl lever, so that the other end rotates the pawl lever along the release operation direction according to the rotation of the one end.

Images