Seat back locking device

Abstract

The embodiment of the invention provides a seat back locking device. The seat back locking device includes: a locking housing coupled to a seat back and defining a first internal space with one side open; a rotary cover inserted into the first internal space, and connected with the lock housing and rotated; a stopper moving along a guide portion defined in the lock housing to lock or unlock with a hook bracket provided on a vehicle body; and a cable connected to one end of the stopper and rotating the stopper, the stopper rotating with both ends of the stopper as a reference by operation of the cable or rotation of the rotary cover so as to be in contact with the hook bracket or the rotary cover.

Description

Technical Field

[0001] The present invention relates to a seat back locking device for combining a seat back and a vehicle body. Background Art

[0002] The seat installed on the vehicle can perform the functions of sliding the seat cushion forward and / or folding or unfolding the seat back. When the seat back is not folded, the seat back can remain in a state of being combined with the vehicle body. The user operates a lever to release the lock between the seat back and the vehicle body, and through the operation of the lever, the latch connecting the seat back and the vehicle body can be released. When the lock between the seat back and the vehicle body is released, the user can perform folding of the seat back, that is, when the lock between the seat back and the vehicle body is not released, the seat back cannot be folded.

[0003] However, the deployment is performed in a state where the seat back is folded and can be connected to the vehicle body after the seat back is deployed, but at this time, the seat back and the vehicle body can be locked only after the seat cushion slides to the rearmost position.

[0004] In addition, in the case where there is no separate space behind the second row of seats, for the convenience of passengers, the seat back can be reclined by sliding the seat cushion forward.

[0005] In addition, the latch for connecting the seat back and the vehicle body is provided on the back side of the seat back, which causes a problem that foreign matter enters the interior of the seat back through the latch. Summary of the invention

[0006] 1. Technical issues to be resolved

[0007] The technical problem of the present invention is to provide a seat back locking device which can perform the coupling between the seat back and the vehicle body regardless of the position of the seat cushion.

[0008] The technical problem of the present invention is to provide a seat back locking device which can perform the combination between the seat back and the vehicle body regardless of whether the seat cushion slides or not.

[0009] The technical problem of the present invention is to provide a seat back locking device which can prevent foreign matter from entering the interior of the seat back.

[0010] (II) Technical solution

[0011] An embodiment of the present invention provides a seat back locking device. The seat back locking device includes: a locking shell coupled to a seat back and defining a first internal space with one side open; a rotating cover inserted into the first internal space and connected to and rotating with the locking shell; a stopper moving along a guide defined in the locking shell to lock or unlock with a hook bracket provided on a vehicle body; a cable connected to one end of the stopper and rotating the stopper, and through the operation of the cable or the rotation of the rotating cover, the stopper rotates with both ends of the stopper as a reference to contact with the hook bracket or the rotating cover.

[0012] According to one example, both ends of the stopper are hingedly coupled to the locking housing or a main bracket disposed on the locking housing.

[0013] According to one example, the stopper has a bent shape, and the stopper is divided into a first area inserted into the guide portion and a second area located outside the guide portion.

[0014] According to one example, when the seat back is fixed to a vehicle body, the hook bracket is coupled to the stopper in a state of being inserted into a second inner space of the rotation cover defined by a shape protruding toward the locking housing.

[0015] According to one example, the rotating cover is located between the locking housing and the stopper located in the guide portion, and the rotating cover is disposed at a position spaced apart from the stopper.

[0016] According to one example, the stopper rotates when the cable is pulled, and the stopper is unlocked from the hook bracket. During the folding of the seat back, the hook bracket moves away from the rotating cover, and the rotating cover rotates and moves to a closed position without interfering with the stopper. The closed position of the rotating cover refers to a position that blocks the first internal space of the locking shell.

[0017] According to one example, when the cable is released from the pulled state, the stopper is located on the rotating cover in the closed position.

[0018] According to one example, when the seat back is in the folded state, a portion of the stopper located in the guide portion is located on the rotating cover.

[0019] According to one example, when the hook bracket is inserted into the second inner space of the rotation cover defined by the shape protruding toward the locking housing by the unfolding of the seat back, the rotation cover is rotated by the hook bracket to rotate the stopper.

[0020] According to one example, the stopper rotated by the rotating cover moves to the upper part of the guide portion, the stopper passes over the rotating cover and contacts the hook bracket, so that the seat back is fixed to the vehicle body, and the upper part of the guide portion points in a direction away from the point where the rotating cover and the locking housing are connected.

[0021] According to one example, when the stopper and the hook bracket are connected, the first spring connected to the stopper pulls the stopper toward the lower part of the guide portion, thereby maintaining the position of the stopper, and the lower part of the guide portion refers to a direction close to the point where the rotating cover and the locking housing are connected.

[0022] According to an example, the one end of the stopper is connected to the cable, and the other end opposite to the one end is connected to the first spring.

[0023] According to one example, the rotating cover and the locking shell are connected to each other via a rotating pin, and a second spring is installed on the periphery of the rotating pin to keep the rotating cover in a closed position, wherein the closed position of the rotating cover refers to a position blocking the first internal space of the locking shell.

[0024] According to one example, the lower end portion of the rotating cover is connected to the lower end portion of the locking shell, and when the cable is pulled, the stopper in the guide portion rotates to move away from the lower end portion of the rotating cover, and the lower end portion of the rotating cover and the lower end portion of the locking shell refer to portions adjacent to the seat cushion.

[0025] According to one example, in a state where the stopper and the hook bracket are locked, even if the seat cushion slides, the locking of the stopper and the hook bracket is maintained.

[0026] According to one example, the locking shell includes a first shell defining the first internal space and a second shell having a flat structure connected to the first shell and partially open to expose the first internal space, and when the stopper and the hook bracket are unlocked, the rotating cover blocks the first internal space exposed through the second shell.

[0027] (III) Beneficial effects

[0028] According to an embodiment of the present invention, the locking between the seat back locking device and the vehicle body can be released by rotating the stopper connected to the vehicle body through the user's lever operation. Therefore, the locking and unlocking between the seat back locking device and the vehicle body can be achieved by simplified components.

[0029] According to an embodiment of the present invention, the seat back locking device includes a first spring, which is used to fix the position of a stopper for locking or unlocking with the vehicle body to the lower part of the guide portion, so that when the seat back locking device and the vehicle body are combined, the locking between the seat back locking device and the vehicle body can be maintained regardless of how the angle of the seat back changes or whether the seat cushion slides.

[0030] According to an embodiment of the present invention, when the lock between the seat back and the hook bracket is released, the rotating cover can block the first inner space of the locking shell to prevent it from being exposed to the outside. The rotating cover can be matched with the second shell of the locking shell to prevent external foreign matter from entering the interior of the locking shell.

[0031] According to the embodiment of the present invention, regardless of the position of the seat cushion, when the seat back locking device mounted on the seat back and the hook bracket mounted on the vehicle body contact each other, the seat back locking device can perform locking between the seat back and the vehicle body. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 1 is a diagram showing a seat to which a seat back locking device according to an embodiment of the present invention is installed.

[0033] Figure 2 is a perspective view showing a seat back locking device according to an embodiment of the present invention.

[0034] Figure 3 is an exploded perspective view showing a seat back locking device according to an embodiment of the present invention.

[0035] Figure 4 : is a diagram showing a lever for operating the seat back locking device according to the embodiment of the present invention.

[0036] Figure 5 1 is a diagram showing a state in which a seat back locking device according to an embodiment of the present invention is connected to a hook bracket mounted on a vehicle body.

[0037] Figure 6 2 is a cross-sectional view for explaining that the seat back locking device according to the embodiment of the present invention is unlocked by the operation of the lever.

[0038] Figure 7 is a cross-sectional view for explaining that a rotary cover of a seat back locking device according to an embodiment of the present invention moves to a closed position by folding of a seat back.

[0039] Figure 8 It is a diagram for explaining the position of the rotation cover in a state where the lock of the seat back locking device according to the embodiment of the present invention is released.

[0040] Fig. 9 It is a view for explaining that the seat back locking device according to the embodiment of the present invention is connected to a hook bracket mounted on a vehicle body by unfolding the seat back.

[0041] Fig.10 1 is a diagram for explaining the combination of the stopper and the hook bracket when the seat back locking device according to the embodiment of the present invention comes into contact with the hook bracket.

[0042] Fig.11 and Fig.12 1 is a diagram for explaining a state in which the seat back locking device according to the embodiment of the present invention maintains a locked state. DETAILED DESCRIPTION

[0043] The advantages and features of the present invention and the methods for achieving the advantages and features will become more clear with reference to the embodiments described in detail below in conjunction with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed herein, but can be implemented in various different forms. These embodiments are provided only to make the disclosure of the present invention complete and to enable those skilled in the art to which the present invention belongs to fully understand the present invention. The present invention is limited by the scope of the claims. Throughout the specification, the same reference numerals refer to the same components.

[0044] In addition, in this specification, components are classified as first, second, etc. in order to distinguish components having the same name, and the order is not necessarily limited in the following description.

[0045] The detailed description is an illustration of the present invention. In addition, the above content describes the preferred embodiments of the present invention, and the present invention can be used in various other combinations, modifications and environments. That is, it can be modified or changed within the scope of the inventive concept disclosed in this specification, within the scope equivalent to the disclosed content described, and / or within the scope of the technology or knowledge in the field. The described embodiments illustrate the best state for realizing the technical ideas of the present invention, and various modifications can be made according to the specific application fields and uses of the present invention. Therefore, the following detailed description of the present invention is not intended to limit the present invention to the disclosed implementation states. In addition, the attached claims should be interpreted as including other implementation states.

[0046] Figure 1 1 is a diagram showing a seat to which a seat back locking device according to an embodiment of the present invention is installed.

[0047] Reference Figure 1, the seat 1 installed in the vehicle may include a seat back 50 and a seat cushion 80. The seat back locking device 10 may be installed on the seat back 50. Specifically, the seat back locking device 10 may be installed on a seat back frame constituting the seat back 50. The seat back locking device 10 is configured to connect the vehicle body and the seat 1 to each other, and before performing the folding of the seat back 50, the connection between the seat back locking device 10 and the vehicle body must be released. The seat back locking device 10 may be provided inside the seat back 50, and a portion of the seat back locking device 10 may be exposed at the back of the seat back 50. Since only a portion of the seat back locking device 10 is exposed to the outside of the seat back 50, foreign objects may be prevented from entering the inside of the seat back locking device 10. In addition, since the seat back locking device 10 is configured so that when the seat back 50 is folded, the internal structural member of the seat back locking device 10 is not exposed to the outside, foreign objects may be prevented from entering the inside of the seat back locking device 10.

[0048] Figure 2 is a perspective view showing a seat back locking device according to an embodiment of the present invention, Figure 3 is an exploded perspective view showing a seat back locking device according to an embodiment of the present invention, Figure 4 : is a diagram showing a lever for operating the seat back locking device according to the embodiment of the present invention.

[0049] Reference Figures 1 to 4 The seat back locking device 10 includes a locking housing 100, a rotating cover 200, a stopper 300, a cable 400, a main bracket 500, and a first spring 600. The seat back locking device 10 can be activated by a user pulling a lever 90. When the user pulls the lever 90, the cable 400 connected to the lever 90 can be pulled downward based on the installation direction of the seat 1 by the rotation of the lever 90. When the cable 400 is pulled, the stopper 300 rotates, so that the locking between the stopper 300 and the vehicle body can be released.

[0050] The locking housing 100 may include a first housing 110 defining a first internal space opened on one side and a second housing 130 connected to the first housing 110. The first housing 110 may have a convex shape protruding with the second housing 130 as a reference. A portion of the second housing 130 is open to expose the first internal space and has a flat plate structure. A guide portion 150 may be defined in the locking housing 100, the guide portion 150 defining a space in which a portion of the stopper 300 is inserted and moves. The guide portion 150 is a slit and may refer to an open space defined in the first housing 110. The guide portion 150 may extend from the top surface of the first housing 110 to the side surface of the first housing 110. The guide portion 150 may extend from the upper portion of the first housing 110 to the lower portion of the first housing 110. In other words, the guide portion 150 may extend from the upper portion to the lower portion of the lock housing 100 , and the upper portion of the lock housing 100 or the guide portion 150 may refer to an upper portion based on a direction in which the seat back locking device 10 is mounted to the seat back 50 .

[0051] The rotating cover 200 may be inserted into the first inner space of the locking housing 100, and may be connected to the locking housing 100 and rotate. Specifically, the rotating cover 200 may be inserted into the first inner space of the first housing 110, and may be connected to the lower end of the first housing 110. That is, the lower end of the rotating cover 200 may be connected to the lower end of the locking housing 100. The lower portion of the guide portion 150 may refer to a direction close to the point where the rotating cover 200 and the locking housing 100 are connected. The lower end of the rotating cover 200 may be provided with a connecting portion 230 for connecting to the locking housing 100, and the upper end of the rotating cover 200 may be provided with a curved surface 210 for contacting the stopper 300.

[0052] The connection portion 230 of the rotating cover 200 and the lower end portion of the locking housing 100 may be connected to each other by a rotating pin 250. The rotating pin 250 may be inserted into a hole defined in the connection portion 230 of the rotating cover 200 and a hole defined in the lower end portion of the locking housing 100. By means of the rotating pin 250, the rotating cover 200 may be rotated with the lower end portion of the locking housing 100 as a reference. A second spring 280 may be installed on the periphery of the rotating pin 250. The second spring 280 may apply an elastic force to the rotating cover 200 so that the rotating cover 200 moves to a closed position. The closed position of the rotating cover 200 may refer to a position where the rotating cover 200 blocks the first internal space of the locking housing 100.

[0053] The stopper 300 may be rotated by operation of the cable 400. The stopper 300 may include: a first region 310 inserted into the guide portion 150 defined in the first housing 110 of the locking housing 100; and second regions 330, 350 representing both ends with the first region 310 as a reference. The second regions 330, 350 may be located outside the guide portion 150. The first region 310 may be configured to be combined with a vehicle body and may be in the shape of an elongated straight bar. The second regions 330, 350 are regions bent with the first region 310 as a reference and may be connected to the main bracket 500. The stopper 300 may be rotated with the second regions 330, 350 connected to the main bracket 500 as a reference. By the rotation of the stopper 300, the first region 310 may be moved between the lower portion and the upper portion of the guide portion 150. When the first region 310 of the stopper 300 is located at the uppermost portion of the guide portion 150, the rotating cover 200 and the stopper 300 may not interfere with each other, and the rotating cover 200 may rotate without contacting the stopper 300. When the first region 310 of the stopper 300 is located at the lowermost portion of the guide portion 150, the stopper 300 may be in a state of being combined with the vehicle body.

[0054] The cable 400 may be connected to the stopper 300. Specifically, the cable 400 may be connected to one of the second regions 330, 350 of the stopper 300, and the first spring 600 may be connected to the other of the second regions 330, 350. For example, the cable 400 may be connected to the second region 330, and the first spring 600 may be connected to the second region 350. When the cable 400 is pulled downward with reference to the setting direction of the seat 1, the stopper 300 may move to the upper part of the guide portion 150. When the wire fence 400 is released from being pulled, the stopper 300 may move to the lower part of the guide portion 150.

[0055] By the operation of the cable 400 or the rotation of the rotating cover 200, the stopper 300 can be rotated with both ends of the stopper 300 as a reference to contact with a hook bracket (not shown) provided on the vehicle body or contact with the rotating cover 200. When the cable 400 is operated in a state where the coupling between the stopper 300 and the hook bracket (not shown) is maintained, the stopper 300 is rotated to release the coupling with the hook bracket (not shown), and the rotating stopper 300 can move onto the curved surface 210 of the rotating cover 200. When the seat back 50 is unfolded so that the stopper 300 and the hook bracket (not shown) are coupled, the hook bracket (not shown) can push the rotating cover 200 toward the locking housing 100, thereby rotating the stopper 300. The stopper 300 can move within the guide portion 150, connected with the hook bracket (not shown), so that the seat back locking device 10 and the vehicle body can be coupled to each other.

[0056] The main bracket 500 may be located on the locking housing 100. The locking housing 100 and the main bracket 500 may be combined with each other by bolts. The main bracket 500 may be connected to the stopper 300 by the sub-brackets 710 and 730. Both ends of the stopper 300 may be hingedly combined with the main bracket 500. However, both ends of the stopper 300 may not be combined with the main bracket 500, but may be combined with a part of the locking housing 100 and pivoted. The sub-brackets 710 and 730 may include a first sub-bracket 710 connected to the second region 330 of the stopper 300 and the cable 400 and a second sub-bracket 730 connected to the second region 350 of the stopper 300. The first hole 510 of the main bracket 500, the first sub-bracket 710, the second region 330 of the stopper 300, and the cable 400 may be connected to each other by bolts. The second hole 530 of the main bracket 500, the second sub-bracket 730, and the second region 350 of the stopper 300 may be connected to each other by bolts. The main bracket 500 may be provided with a protrusion 550 for confirming the position of the cable 400 , and the cable 400 may be inserted into a groove formed in the protrusion 550 and can only move up and down based on the installation direction of the seat 1 .

[0057] The first spring 600 may play a role in fixing the position of the stopper 300 when the stopper 300 is located at the lower part of the guide part 150 and combined with the vehicle body. The first spring 600 may be directly connected to the stopper 300 or may be connected to the second sub-bracket 730 connected to the stopper 300. The first spring 600 may pull the stopper 300 or the second sub-bracket 730 downward based on the setting direction of the seat 1, thereby limiting the rotation of the stopper 300 or the second sub-bracket 730. In other words, the rotation of the stopper 300 toward the upper part of the guide part 150 may be limited by the first spring 600. One end of the first spring 600 may be connected to the stopper 300 or the second sub-bracket 730 connected to the stopper 300, and the other end of the first spring 600 may be connected to the main bracket 500 or the frame of the seat back 50. The position of the first spring 600 may be fixed.

[0058] According to the embodiment of the present invention, the locking between the seat back locking device 10 and the vehicle body can be released by rotating the stopper 300 connected to the vehicle body through the operation of the lever 90 by the user. Therefore, the locking and unlocking between the seat back locking device 10 and the vehicle body can be achieved by simplified components.

[0059] According to an embodiment of the present invention, the seat back locking device 10 includes a first spring 600, which is used to fix the position of the stopper 300 for locking or unlocking with the vehicle body to the lower part of the guide portion 150, so that when the seat back locking device 10 and the vehicle body are combined, the locking between the seat back locking device 10 and the vehicle body can be maintained regardless of how the angle of the seat back 50 changes or whether the seat cushion 80 slides.

[0060] Figure 5 1 is a diagram showing a state in which a seat back locking device according to an embodiment of the present invention is connected to a hook bracket mounted on a vehicle body, Figure 6 2 is a cross-sectional view for explaining that the seat back locking device according to the embodiment of the present invention is unlocked by the operation of the lever.

[0061] Reference Figure 1 , Figure 5 and Figure 6 , in a state where the seat back locking device 10 and the hook bracket 5 mounted on the vehicle body are combined, the folding of the seat back 50 can be restricted. In a state where the seat back locking device 10 is locked, the hook bracket 5 can be combined with the stopper 300. Specifically, the hook bracket 5 can be combined with the first area of ​​the stopper 300 located in the guide portion 150. At this time, the rotating cover 200 can be a state of being rotated into the first internal space 105 of the locking housing 100, and the hook bracket 5 can be a state of being inserted into the second internal space 205 of the rotating cover 200 defined by the shape protruding toward the locking housing 100. The rotating cover 200 can be located between the locking housing 100 and the stopper 300 located in the guide portion 150. The rotating cover 200 can be disposed at a position spaced apart from the stopper 300 so that the rotating cover 200 and the stopper 300 do not contact each other.

[0062] When the cable 400 is pulled by the user's operation, the stopper 300 may rotate toward the upper portion of the guide portion 150, and the stopper 300 and the hook bracket 5 may be unlocked as the stopper 300 rotates. The upper portion of the guide portion 150 may refer to a direction away from the point where the rotating cover 200 and the locking housing 100 are connected, and the lower portion of the guide portion 150 may refer to a direction close to the point where the rotating cover 200 and the locking housing 100 are connected.

[0063] Figure 7 is a cross-sectional view for explaining that the rotary cover of the seat back locking device according to the embodiment of the present invention moves to the closed position by folding the seat back, Figure 8 It is a diagram for explaining the position of the rotation cover in a state where the lock of the seat back locking device according to the embodiment of the present invention is released.

[0064] Reference Figure 5 , Figure 7 and Figure 8 , after the cable 400 is pulled by the user's operation, the seat back 50 can be folded, and in this process, the hook bracket 5 is away from the rotating cover 200, and the rotating cover 200 can be rotated without interfering with the stopper 300. That is, the rotating cover 200 can be moved to the closed position so that the first internal space 105 of the locking housing 100 is not exposed to the outside, and the rotating cover 200 can be moved to the closed position by the elastic force of the second spring 280. When the rotating cover 200 moves to the closed position and the user releases the operation of the lever, the stopper 300 can be rotated and moved to the curved surface 210 of the rotating cover 200. In the state where the lock between the seat back 50 and the hook bracket 5 is released, the rotating cover 200 can block the first internal space 105 of the locking housing 100 to prevent it from being exposed to the outside. The rotating cover 200 can be matched with the second housing 130 of the locking housing 100 to prevent external foreign matter from entering the interior of the locking housing 100.

[0065] According to an embodiment of the present invention, by the second spring 280 for moving the rotating cover 200 to the closed position, the first internal space 105 of the locking housing 100 can be blocked by the rotating cover 200 to prevent foreign matter from entering the interior of the seat back locking device 10 even when the seat back is folded.

[0066] Fig. 9 It is a view for explaining that the seat back locking device according to the embodiment of the present invention is connected to a hook bracket mounted on a vehicle body by unfolding the seat back.

[0067] Reference Figure 1 and Fig. 9 , in a state where the seat back 50 is folded, the seat back locking device 10 and the hook bracket 5 may not be coupled to each other. At this time, the stopper 300 may be located on the curved surface 210 of the rotating cover 200. When the user performs an unfolding operation of the seat back 50, the hook bracket 5 may be inserted into the second inner space 205 of the rotating cover 200 to push the rotating cover 200. The rotating cover 200 rotates toward the locking housing 100, so that the rotating cover 200 may push the stopper 300 toward the upper portion of the guide portion 150. In other words, the rotating cover 200 may rotate in contact with the hook bracket 5, and the stopper 300 may rotate as the rotating cover 200 rotates.

[0068] Fig.10 1 is a diagram for explaining the combination of the stopper and the hook bracket when the seat back locking device according to the embodiment of the present invention comes into contact with the hook bracket.

[0069] Reference Figure 1 , Fig. 9 and Fig.10, the stopper 300 can move to the upper part of the guide part 150 without interfering with the rotating cover 200, and when the rotating cover 200 rotates and passes through the stopper 300, the stopper 300 is not subjected to the pressure of the rotating cover 200 and can rotate toward the lower part of the guide part 150. As the stopper 300 moves toward the lower part of the guide part 150, the stopper 300 can contact the hook bracket 5. The combination of the stopper 300 and the hook bracket 5 can indicate that the seat back locking device 10 is locked to the vehicle body.

[0070] According to the embodiment of the present invention, the seat back locking device 10 can perform locking between the seat back 50 and the vehicle body when the seat back locking device 10 mounted on the seat back 50 and the hook bracket 5 mounted on the vehicle body contact each other regardless of the position of the seat cushion 80. That is, even in a state where the seat cushion 80 is moved forward, locking between the seat back 50 and the vehicle body can be achieved by unfolding the seat back 50.

[0071] Fig.11 and Fig.12 1 is a diagram for explaining a state in which the seat back locking device according to the embodiment of the present invention maintains a locked state.

[0072] Reference Fig.11 and Fig.12 , the seat cushion 80 can slide while the seat back 50 is fixed to the hook bracket 5. When the user operates the slide rod 85, the seat cushion 80 can move forward based on the setting position of the seat 1. When the seat cushion 80 slides, the seat back 50 fixed to the hook bracket 5 can be tilted in conjunction with the tilt hinge 30.

[0073] Even if the seat cushion 80 slides, if the user does not activate the seat back locking device 10, the locking between the seat back locking device 10 and the hook bracket 5 can be maintained. The first spring 600 can pull the second sub-bracket 730 downward based on the setting direction of the seat 1, and the second sub-bracket 730 does not rotate due to the first spring 600, and the position of the second sub-bracket 730 can be fixed. Since the position of the second sub-bracket 730 is fixed, the stopper 300 connected to the second sub-bracket 730 will not rotate either. Therefore, the combination between the stopper 300 and the hook bracket 5 can be maintained.

[0074] According to an embodiment of the present invention, the first spring 600 limits the rotation of the stopper 300 or the second sub-bracket 730 connected to the stopper 300, so that when the seat back locking device 10 is combined with the vehicle body, the locking between the seat back locking device 10 and the vehicle body can be maintained regardless of how the angle of the seat back 50 changes or whether the seat cushion 80 slides.

[0075] Although the embodiments of the present invention are described above with reference to the accompanying drawings, it will be understood by those skilled in the art that the present invention can be implemented in other specific forms without changing its technical ideas or essential features. Therefore, it should be understood that the above embodiments are exemplary in all aspects and not restrictive.

Claims

1. A seat back locking device, comprising: a locking housing coupled to the seat back and defining a first interior space open on one side; A rotating cover, inserted into the first inner space and connected to and rotating with the locking housing; a stopper that moves along a guide portion defined in the locking housing to lock or unlock with a hook bracket provided on the vehicle body; a cable connected to one end of the stopper and causing the stopper to rotate, Through the operation of the cable or the rotation of the rotating cover, the stopper rotates with both ends of the stopper as a reference to come into contact with the hook bracket or the rotating cover.

2. The seat back locking device according to claim 1, wherein: Both ends of the stopper are hingedly connected to the locking shell or a main bracket arranged on the locking shell.

3. The seat back locking device according to claim 2, wherein: The stopper has a curved shape, The stopper is divided into a first region inserted into the guide portion and a second region located outside the guide portion.

4. The seat back locking device according to claim 1, wherein: When the seat back is fixed to a vehicle body, the hook bracket is coupled to the stopper in a state of being inserted into a second inner space of the rotation cover defined by a shape protruding toward the lock housing.

5. The seat back locking device according to claim 4, wherein: The rotating cover is located between the locking housing and the stopper located in the guide portion, The rotating cover is disposed at a position spaced apart from the stopper.

6. The seat back locking device according to claim 1, wherein: When the cable is pulled, the stopper rotates and the stopper is unlocked from the hook bracket. During the folding of the seat back, the hook bracket moves away from the rotating cover, and the rotating cover rotates and moves to a closed position without interfering with the stopper. The closed position of the rotating cover refers to a position blocking the first inner space of the locking housing.

7. The seat back locking device according to claim 6, wherein: When the cable is released from the pulled state, the stopper is located on the rotating cover in the closed position.

8. The seat back locking device according to claim 1, wherein: When the seat back is in the folded state, a portion of the stopper located in the guide portion is located on the rotating cover.

9. The seat back locking device according to claim 8, wherein: When the hook bracket is inserted into the second inner space of the rotation cover defined by the shape protruding toward the locking housing by the unfolding of the seat back, the rotation cover is rotated by the hook bracket to rotate the stopper.

10. The seat back locking device according to claim 9, wherein: The stopper rotated by the rotating cover moves to the upper part of the guide part, The stopper goes over the rotating cover and contacts the hook bracket, so that the seat back is fixed to the vehicle body. An upper portion of the guide portion points in a direction away from a point where the rotating cover and the locking housing are connected.

11. The seat back locking device according to claim 1, wherein: When the stopper is connected to the hook bracket, a first spring connected to the stopper pulls the stopper toward the lower portion of the guide portion, thereby maintaining the position of the stopper. The lower portion of the guide portion points in a direction close to a point where the rotating cover and the locking housing are connected.

12. The seat back locking device according to claim 11, wherein: The one end of the stopper is connected to the cable, and the other end opposite to the one end is connected to the first spring.

13. The seat back locking device according to claim 1, wherein: The rotating cover and the locking housing are connected to each other via a rotating pin, A second spring is installed on the periphery of the rotating pin to keep the rotating cover in a closed position. The closed position of the rotating cover refers to a position blocking the first inner space of the locking housing.

14. The seat back locking device according to claim 1, wherein: The lower end of the rotating cover is connected to the lower end of the locking shell. When the cable is pulled, the stopper in the guide portion rotates to move away from the lower end of the rotating cover. The lower end portion of the rotating cover and the lower end portion of the locking housing refer to portions adjacent to the seat cushion.

15. The seat back locking device according to claim 1, wherein: In a state where the stopper and the hook bracket are locked, even if the seat cushion slides, the locking of the stopper and the hook bracket is maintained.

16. The seat back locking device according to claim 1, wherein: The locking housing includes a first housing defining the first internal space and a second housing having a flat plate structure connected to the first housing and partially opened to expose the first internal space. In a state where the stopper and the hook bracket are unlocked, the rotating cover blocks the first inner space exposed through the second housing.

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