Reclining device for a seat

Abstract

The present disclosure relates to a reclining device for a seat capable of adjusting a seat back to a plurality of angles by movement of a fork joint installed in a vehicle body. The reclining device for a seat includes a latch installed on one side of a seat back and configured to rotate with the seat back, and a fork joint module in which the latch is engaged with a fork joint installed in the vehicle body, wherein in a state in which the fork joint is engaged with the latch, the fork joint moves in a section overlapping a rotation locus of the latch and inclines the seat back together with the latch.

Description

Technical Field

[0001] This disclosure provides a tilting device for a seat that can adjust the seat back to multiple angles by moving a fork joint mounted in the vehicle body. Background Technology

[0002] A tilting device is a device that adjusts the angle of a seat back by lifting a manual lever. At the lower end of the device is a mechanism called a tilting core, and components such as leg supports are mounted on the device to support the tilting core.

[0003] The advantage of this tilting device is that it allows the seat back to be adjusted to multiple angles in 2° increments, and therefore it has been applied to many vehicle models.

[0004] However, because all the structures are supported by two tilting cores, this tilting device is weaker than other seat back adjustment mechanisms, and the cost and weight of the product are increased due to the use of many components.

[0005] To address these issues, a three-point fixed multi-stage latching structure is proposed, in which the vehicle body and seat are fixed by two positions of the bottom hinge and one position of the top fork joint.

[0006] In this configuration, the seat and body are secured in multiple locations, thus the advantage of the multi-stage latching structure is that, from a strength point of view, it is superior to the tilting mechanism.

[0007] However, in the case of a multi-stage latch structure, the seat back angle cannot be flexibly adjusted because multiple mounting slots are provided on a single latch to adjust the seat back angle.

[0008] Furthermore, since the multi-level latch also adjusts the seat back angle by directly and manually lifting the lever, just like in existing tilting devices, adjusting the seat back angle is uncomfortable.

[0009] The foregoing description in the background section is intended only to help understand the background of this disclosure and is not intended to imply that this disclosure falls within the scope of related technologies known to those skilled in the art. Summary of the Invention

[0010] This disclosure is made to address the aforementioned problems, and provides a tilting device for a seat that can adjust the seat back to multiple angles by moving a fork joint mounted in the vehicle body and engaged with a latch.

[0011] To achieve the above objectives, the tilting device for a seat according to this disclosure may include: a latch mounted on one side of the seat back and configured to rotate with the seat back; and a fork module, wherein the latch engages with a fork portion mounted in the vehicle body, wherein, with the fork portion engaged with the latch, the fork portion moves in a segment overlapping the rotational trajectory of the latch and tilts the seat back together with the latch. The fork module may include: a guide thread mounted on the vehicle body along a linear trajectory of movement of the fork portion; a moving block having a threaded structure for being passed through by the guide thread, and the moving block being configured to move linearly along the guide thread by converting rotational movement of the guide thread into linear movement; and a fork portion configured to move together with the moving block. The module mounting bracket can be combined with the vehicle body. The support part can be formed to be bent towards the fork joint at both ends of the module mounting bracket. The sub-bracket can be combined with the support part. The main support hole and the sub-support hole can be formed coaxially on the support part and the sub-bracket, respectively. The main support hole and the sub-support hole are formed to be spaced apart from each other. The guide thread can be inserted into the main support hole and the sub-support hole and supported by them.

[0012] The tilting device may include: a guide bracket coupled between the moving block and the fork joint; and a guide rod coupled to the vehicle body, the guide rod being disposed through the guide bracket in a direction parallel to the guide thread and configured to guide the linear movement of the moving block.

[0013] Extensions can be formed at both ends of the guide bracket in a direction orthogonal to the guide thread, and guide holes are formed on the extensions, with the guide rod passing through the guide holes.

[0014] The tilting device may also include a motor configured to provide rotational drive force to the guiding thread.

[0015] A tilt switch can be installed in the carriage, and the motor can rotate in the forward or reverse direction depending on the operation of the tilt switch.

[0016] The motor mounting bracket can be combined with the vehicle body and the motor can be mounted on the motor mounting bracket. The ends of the motor mounting bracket and the end of the module mounting bracket can be arranged to overlap each other, and the boundary and overlapping parts of the motor mounting bracket and the module mounting bracket can be bolted to the vehicle body.

[0017] It can be formed with a hook portion in which the fork engages with the latch. The hook portion can be formed as a hole extending in a direction perpendicular to the rotation trajectory of the latch. The maximum angle range of the seat back can be determined by configuring an offset range in which the fork can move along the hook portion while simultaneously satisfying the movement trajectory of the fork and the rotation trajectory of the latch.

[0018] The maximum angle range of the seat back can be from 10° to 50°.

[0019] According to this disclosure, since the fork joint moves according to the operation of the motor and the latch is pulled to move in the moving direction of the fork joint, the seat backrest engaged with the latch moves together, so the seat backrest can be adjusted steplessly. Attached Figure Description

[0020] The above and other objects, features and advantages of this disclosure will become clearer from the following detailed description taken in conjunction with the accompanying drawings, in which:

[0021] Figure 1 This is a view illustrating the installation position of the tilting device according to this disclosure;

[0022] Figure 2 This is a view showing the state in which the fork joint is engaged with the latch according to this disclosure;

[0023] Figure 3 This is a view showing the structure and shape of the tilting device according to the present disclosure;

[0024] Figure 4 This is a view showing the sections where the rotational trajectory of the latch and the movement trajectory of the fork module overlap with each other according to this disclosure;

[0025] Figure 5 This is an exploded perspective view of the main components constituting the tilting device according to the present disclosure;

[0026] Figure 6 This is an exploded perspective view of the fork-connector module according to this disclosure;

[0027] Figure 7 This is an exploded perspective view of the module mounting bracket and motor mounting bracket according to this disclosure; and

[0028] Figure 8A , Figure 8B and Figure 8C This is an example view illustrating the adjustment of the seat back angle based on the movement of the fork-mounted module according to this disclosure. Detailed Implementation

[0029] In the following, embodiments of the present disclosure will be described in detail with reference to the accompanying drawings.

[0030] Figure 1 This is a view illustrating the installation position of the tilting device according to this disclosure. Figure 2 This is a view showing the state in which the fork 30 is engaged with the latch 3 according to this disclosure.

[0031] Referring to the accompanying drawings, this disclosure can be applied to the seat back 1 of a rear seat. A latch 3, which is engaged with one side of the seat back frame 1a, rotates together with the seat back 1, and a striker 30 is disposed on the rotational trajectory of the rotating latch 3. The striker 30 is mounted inside the side panel of the vehicle body 7, and the latch 3 engages with the striker 30.

[0032] For reference, the seat has a structure in which the seat back 1 can be folded based on a hinge axis located at the lower end of the seat back 1, and during the folding and unfolding of the seat back 1, the latch 3 can engage with the fork joint 30.

[0033] Specifically, according to this disclosure, the fork joint 30 is movable and capable of rotating the seat back 1 together with the latch 3, and the tilting device according to this disclosure is configured to include only the latch 3 and the fork joint module 5.

[0034] refer to Figure 3 The tilting device is configured to include a latch 3 and a fork module 5, wherein the latch is mounted on one side of the seat back 1 and rotates together with the seat back 1, the latch 3 engages with a fork portion 30 mounted in the vehicle body 7 in the fork module, and in the state where the fork portion 30 is engaged with the latch 3, the movement trajectory of the fork portion overlaps with the rotation trajectory of the latch 3 in a certain section, and together with the latch 3, tilts the seat back 1.

[0035] For example, the fork joint 30 is installed in the part of the rotation trajectory of the latch 3 where the angle of the seat back 1 needs to be fixed, and the latch 3 engages with the fork joint 30 during the rotation of the latch 3 and the seat back 1.

[0036] Furthermore, when the fork module 5, including the fork joint 30, moves linearly in the rotational trajectory section where the tilting operation of the seat back 1 is required, the latch 3, which is engaged with the fork joint 30, moves together with the fork joint 30, thereby tilting the seat back 1.

[0037] This will be through Figure 4 Detailed description. A hook portion 3a is formed, in which a fork portion 30 engages with a latch 3, and the hook portion 3a is formed in the shape of a hole extending in a direction perpendicular to the rotation trajectory of the latch 3.

[0038] Therefore, when the fork joint 30 moves, the maximum angle range of the seat back can be determined by configuring the offset range OS, within which the fork joint 30 can move along the hook portion 3a while simultaneously satisfying the movement trajectory of the fork joint 30 and the rotation trajectory of the latch 3.

[0039] In this case, the offset range OS can be the following distance: the distance that the fork joint 30 can move along the length direction of the hook part 3a based on the center portion of the fork joint 30, and the offset range OS can vary depending on the length of the hook part 3a and the value of the distance that the fork joint 30 can move in a straight line.

[0040] In other words, the distance between the hinge shaft 1b located at the lower end of the seat back 1 and the latch 3 is relatively long, and when the rotation trajectory of the latch 3 is magnified, although the latch 3 rotates, the latch 3 exhibits a rotation that is close to linear. Furthermore, the hook portion 3a of the latch 3 that engages with the fork 30 is formed into the shape of a hole that extends in a direction perpendicular to the rotation trajectory of the latch 3.

[0041] Therefore, if the fork joint 30 moves in the segment S that simultaneously satisfies the linear motion trajectory of the fork joint 30 and the rotational motion trajectory of the latch 3, the fork joint 30 is guided to move upward or downward within the offset range OS of the hooking portion 3a, and thus the latch 3 engaged with the fork joint 30 moves together.

[0042] Therefore, when the latch 3 is pulled and the latch moves together with the fork joint in the direction of movement of the fork joint 30, the seat back 1 engaged with the latch 3 moves together, and thus the seat back 1 can tilt steplessly within the maximum tilt angle of the seat back 1 when the linear motion trajectory of the fork joint 30 and the rotational motion trajectory of the latch 3 overlap with each other.

[0043] at the same time, Figure 5 This is an exploded perspective view of the main components constituting the tilting device according to this disclosure. Figure 6 This is an exploded perspective view of the fork-connecting module 5 according to the present disclosure. The fork-connecting module 5 according to the present disclosure is configured to include a guide thread 10, a moving block 20, and a fork-connecting portion 30.

[0044] The configuration of the fork joint module 5 is described with reference to the accompanying drawings. The fork joint module 5 is configured to include: a guide thread 10, mounted on the vehicle body 7 along a linear trajectory that moves along the fork joint portion 30; a movable block 20 having a threaded structure for being engaged through the guide thread 10, and the movable block being configured to move linearly along the guide thread 10 by converting the rotational motion of the guide thread 10 into linear motion; and the fork joint portion 30, configured to move together with the movable block 20.

[0045] For example, the guide thread 10 rotates in both directions based on its axis, and a hole with an inner circumference formed in a thread shape is formed inside the moving block 20, so that the moving block moves linearly along the guide thread 10 when the guide thread 10 rotates.

[0046] In other words, depending on the rotation direction of the guide thread 10, the moving block 20 moves linearly toward one end or the other end of the guide thread 10, and thus the fork joint 30 that is engaged with the moving block 20 moves together.

[0047] Furthermore, the tilting device according to this disclosure is configured to include a guide bracket 40 coupled between the moving block 20 and the fork joint 30 and a guide rod 50 coupled to the vehicle body 7. The guide rod is disposed through the guide bracket 40 in a direction parallel to the guide thread 10 and is configured to guide the linear movement of the moving block 20.

[0048] For example, bolting is performed with the fork joint 30 in contact with the front surface of the guide bracket 40 and the moving block 20 in contact with the rear surface of the guide bracket 40.

[0049] Furthermore, since the guide rod 50 passes through the guide bracket 40 and engages with the module mounting bracket 60 attached to the vehicle body 7, the fork module 5 cannot rotate, but the fork module can move in a straight line when the guide thread 10 rotates.

[0050] In addition, in a direction orthogonal to the guide thread 10, extensions 42 are formed at both ends of the guide bracket 40, and guide holes 44 are formed on the extensions 42, through which the guide rod 50 can be disposed.

[0051] In other words, since the upper and lower ends of the guide bracket 40 are formed to extend upward and downward, the area through which the guide rod 50 is fixed can be fixed.

[0052] Additionally, the tilting device according to this disclosure may also include a motor M configured to provide rotational driving force to the guiding thread 10.

[0053] For example, the end of the guide thread 10 can be engaged with the shaft of the motor M, and the guide thread 10 can rotate according to the rotation of the motor M.

[0054] Additionally, a tilt switch RS can be installed in the carriage, and the motor M can rotate forward or backward depending on the operation of the tilt switch RS.

[0055] For example, the tilt switch RS can be installed on the door or side panel, and passengers can operate the tilt switch RS to lie down or adjust the angle of the seat back 1.

[0056] In other words, since the fork-mounted module 5 moves by the driving force of the motor M, the angle of the seat back 1 can be adjusted simply by operating the tilt switch RS.

[0057] Therefore, it provides a more luxurious and comfortable user experience when adjusting the angle of the seat back 1, and the cost and weight of the tilting device can be reduced by simplifying the structure compared to existing tilting mechanisms.

[0058] at the same time, Figure 7 This is an exploded perspective view of the module mounting bracket 60 and the motor mounting bracket 70 according to this disclosure.

[0059] Referring to the accompanying drawings, the module mounting bracket 60 is combined with the vehicle body 7. The support portion 62 is formed to bend towards the fork portion 30 at both ends of the module mounting bracket 60. The sub-bracket 64 is combined with the support portion 62. The main support hole 62a and the sub-support hole 64a are coaxially formed on the support portion 62 and the sub-bracket 64, respectively. The main support hole 62a and the sub-support hole 64a are spaced apart from each other, and the guide thread 10 can be inserted into the main support hole 62a and the sub-support hole 64a and supported by these holes.

[0060] For example, the middle portion of the module mounting bracket 60 installed on the vehicle body 7 is formed into the shape of a rectangular plate, and the support portion 62 is formed to extend vertically from the middle portion of the module mounting bracket 60.

[0061] Furthermore, the upper and lower ends of the sub-support 64 are installed inside the support portion 62, the main support hole 62a is formed at the middle of the support portion 62, and the sub-support hole 64a is formed at the middle of the sub-support 64.

[0062] In this case, since the cross-section of the middle portion of the sub-support 64 is formed in a "U" shape, a structure is provided in which the main support hole 62a and the sub-support hole 64a are formed to be spaced apart from each other.

[0063] Therefore, since the guide thread 10 is inserted into the main support hole 62a and the secondary support hole 64a respectively and is supported by these holes, the number of support points of the guide thread 10 increases, thus the guide thread 10 can be supported more stably and the straightness of the guide thread 10 can be improved.

[0064] For reference, both ends of the guide rod 50 are also mounted through the sub-bracket 64 and the support 62.

[0065] Next, as Figure 7 As shown, according to this disclosure, the bracket equipped with the fork-joint module 5 and the motor M can be configured separately.

[0066] Referring to the attached drawings, the motor mounting bracket 70 is combined with the vehicle body 7, and the motor M is mounted on the motor mounting bracket. The ends of the motor mounting bracket 70 and the module mounting bracket 60 are arranged to overlap each other, and the boundary and overlapping portions of the motor mounting bracket 70 and the module mounting bracket 60 can be bolted to the vehicle body 7.

[0067] For example, not only the module mounting bracket 60, but also the motor mounting bracket 70 is formed into a rectangular plate shape, and the module mounting bracket 60 and the motor mounting bracket 70 are formed to have equal vertical lengths.

[0068] Furthermore, with a portion of the motor mounting bracket 70 overlapping the rear side of the module mounting bracket 60, the bracket is assembled to the vehicle body 7 via a 6-point bolt connection.

[0069] In other words, since the motor mounting bracket 70 and the module mounting bracket 60 are mounted on the vehicle body 7 in a state of overlapping each other, the combined stiffness of the mounting brackets is increased, thereby increasing the combined stiffness of the motor M and the fork module 5 mounted on the motor mounting bracket 70 and the module mounting bracket 60.

[0070] at the same time, Figures 8A to 8C This is a view illustrating the adjustment of the angle of the seat back 1 by moving the fork module 5 according to this disclosure.

[0071] For example, the maximum angle range of the seat back can be set from 10° to 50°.

[0072] Referring to the accompanying drawings, the fork joint 30 is moved back and forth along the guide thread 10 by the operation of the motor M, thereby moving the latch 3 engaged with the fork joint 30 together, thus allowing the angle of the seat back 1 to be adjusted.

[0073] In other words, Figure 8A The diagram shows the fork joint 30 moved to the foremost position of the guide thread member 10 by the operation of the motor M. In this state, the seat back 1 is maximally upright within its tilting range, and the angle of the seat back 1 is at a level of 15°.

[0074] also, Figure 8B The diagram shows the fork joint 30 moved to the middle position of the guide thread member 10 by the operation of the motor M. In this state, the seat back 1 is positioned at the middle angle within the tilt operation range of the seat back 1, and in this case, the angle of the seat back 1 is at a level of 26°.

[0075] also, Figure 8CThe diagram shows the fork joint 30 moving to the final position of the guide thread 10 via the operation of the motor M. In this state, the seat back 1 tilts to its maximum extent within its tilting range, and the angle of the seat back 1 is at a level of 40°.

[0076] As described above, according to this disclosure, since the fork joint 30 moves according to the operation of the motor M and the latch 3 is pulled to move in the moving direction of the fork joint 30, the seat back 1 engaged with the latch 3 moves together, thereby allowing the seat back 1 to be tilted at an infinitely variable angle.

[0077] While specific embodiments of this disclosure have been shown and described for illustrative purposes, those skilled in the art will understand that various modifications, additions, and substitutions may be made without departing from the scope and spirit of this disclosure as disclosed in the appended claims.

Claims

1. A tilting device for a seat, comprising: A latch is installed on one side of the seat back; as well as A fork-joint module in which the latch engages with a fork-joint portion mounted in the vehicle body; Wherein, in the state where the fork is engaged with the latch, the fork moves in a section that overlaps with the rotational trajectory of the latch, and wherein the fork, together with the latch, tilts the seat back. The fork module includes: A guide thread is mounted on the vehicle body along the trajectory of the fork joint; A movable block having a threaded structure for being passed through by the guide thread, and the movable block being configured to move linearly along the guide thread by converting the rotational motion of the guide thread into linear motion; and The fork joint is configured to move together with the moving block; The vehicle body is fixed with a module mounting bracket; The support portion bends toward the fork joint at both ends of the module mounting bracket; The support portion is fixed with a secondary bracket; A main support hole is formed on the support portion, and a secondary support hole is formed on the secondary bracket. The main support hole and the secondary support hole are coaxial and spaced apart from each other. The guide thread is inserted into the main support hole and the secondary support hole and is supported by the main support hole and the secondary support hole.

2. The tilting device according to claim 1, further comprising: A guide bracket is located between the movable block and the fork joint; as well as A guide rod, fixed to the vehicle body, passes through the guide bracket in a direction parallel to the guide thread and is configured to guide the linear movement of the moving block.

3. The tilting device according to claim 2, wherein extensions are formed at both ends of the guide bracket in a direction orthogonal to the guide thread, and A guide hole is formed on the extension, and the guide rod passes through the guide hole.

4. The tilting device according to claim 1, further comprising a motor configured to provide rotational driving force to the guide thread.

5. The tilting device according to claim 4, wherein a tilting switch is provided in the carriage; and When the tilt switch is operated, the motor rotates in either the forward or reverse direction.

6. The tilting device according to claim 1, wherein the vehicle body is fixed with a motor mounting bracket, and the motor is mounted on the motor mounting bracket; The ends of the motor mounting bracket and the module mounting bracket overlap each other; and The boundary and overlapping portions of the motor mounting bracket and the module mounting bracket are bolted to the vehicle body.

7. The tilting device according to claim 1, wherein a hook portion is formed, in which the fork portion is fixed to the latch; The hook portion is formed as a hole extending in a direction perpendicular to the rotation trajectory of the latch; and The maximum angle range of the seat back is determined by configuring the offset range, within which the fork joint can move along the hook portion while simultaneously satisfying the movement trajectory of the fork joint and the rotation trajectory of the latch.

8. The tilting device according to claim 7, wherein the maximum angle range of the seat back is 10° to 50°.

9. A tilting device for a seat, comprising: A latch is installed on one side of the seat back; as well as A fork-joint module in which the latch engages with a fork-joint portion mounted in the vehicle body; In the state where the fork is engaged with the latch, the fork moves in a segment that overlaps with the rotational trajectory of the latch, and wherein the fork, together with the latch, tilts the seat back. The fork-connecting module includes: A guide thread is mounted on the vehicle body along the trajectory of the fork joint; A movable block having a threaded structure for being passed through by the guide thread, and the movable block being configured to move linearly along the guide thread by converting the rotational motion of the guide thread into linear motion, wherein the fork portion is configured to move together with the movable block; and A guide rod, fixed to the vehicle body, is positioned in a direction parallel to the guide thread and configured to guide the linear movement of the moving block; The vehicle body is fixed with a module mounting bracket; The support portion bends toward the fork joint at both ends of the module mounting bracket; The support portion is fixed with a secondary bracket; A main support hole is formed on the support portion, and a secondary support hole is formed on the secondary bracket. The main support hole and the secondary support hole are coaxial and spaced apart from each other. The guide thread is inserted into the main support hole and the secondary support hole and is supported by the main support hole and the secondary support hole.

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