Headrest assembly and vehicle

Abstract

The present invention discloses a headrest assembly and a vehicle, wherein the headrest assembly includes: a fixed bracket; a rotating shaft; a headrest; an unlocking mechanism; a locking hook; and a driving mechanism. The unlocking mechanism has a first position, a second position, and a third position. The second position is located between the first position and the third position. In the first position, the locking hook is in a mating state, and the headrest is in an upright state. During the process of the unlocking mechanism rotating from the first position to the second position, the unlocking mechanism rotates relative to the rotating shaft, and the locking hook switches from the mating state to the disengaged state. In the second position, the locking hook is in a disengaged state, and the headrest is in an upright state. During the process of the unlocking mechanism rotating from the second position to the third position, the unlocking mechanism and the rotating shaft rotate synchronously, and the locking hook is in a disengaged state. In the third position, the headrest is in a lying state, and the locking hook is in a disengaged state. According to the headrest assembly of the present invention, the headrest can be transformed from a vertical state to a lying state to meet the different needs of users for headrests.

Description

Technical Field

[0001] The present invention belongs to the technical field of vehicles, and in particular relates to a headrest assembly and a vehicle. Background Art

[0002] Usually, the headrests of vehicle seats cannot be adjusted. Since the headrests of the seats are positioned higher, the headrests of the rear seat and the front passenger seat will affect the driver's field of vision, and the front passenger seat headrest will affect the field of vision of the rear passengers, thereby affecting the driving safety and riding experience of the driver and passengers. Summary of the Invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention provides a headrest assembly, wherein the headrest of the headrest assembly can be transformed from an upright state to a lying state to meet the different needs of users for headrests.

[0004] The present invention also provides a vehicle, comprising the above-mentioned headrest assembly.

[0005] The headrest assembly according to an embodiment of the present invention includes: a fixed bracket; a rotating shaft, wherein the rotating shaft is rotatably provided on the fixed bracket; a headrest, wherein the headrest is connected to the rotating shaft and rotates synchronously with the rotating shaft; an unlocking mechanism, wherein the unlocking mechanism is sleeved on the rotating shaft; a lock hook, wherein the lock hook is rotatably provided on the fixed bracket, and one end of the lock hook away from the rotation axis of the lock hook stops against the unlocking mechanism, wherein the lock hook has a mating state with the rotating shaft and a disengaged state with the rotating shaft, in which the rotating shaft is fixed relative to the fixed bracket in the mating state, and in the disengaged state, the rotating shaft is rotatable relative to the fixed bracket; a driving mechanism, wherein the driving mechanism is connected to the fixed bracket and is used to drive the unlocking mechanism to rotate, and the unlocking mechanism has A first position, a second position and a third position, the second position is located between the first position and the third position, in the first position the lock hook is in the engaged state, and the headrest is in the upright state, in the process of the unlocking mechanism rotating from the first position to the second position, the unlocking mechanism rotates relative to the rotating shaft, and the lock hook switches from the engaged state to the disengaged state, in the second position, the lock hook is in the disengaged state, and the headrest is in the upright state, in the process of the unlocking mechanism rotating from the second position to the third position, the unlocking mechanism and the rotating shaft rotate synchronously, the lock hook is in the disengaged state, and in the third position, the headrest is in the lying state, and the lock hook is in the disengaged state.

[0006] According to the headrest assembly of the embodiment of the present invention, the rotating shaft is rotatably provided on the fixed bracket, the headrest is connected to the rotating shaft and rotates synchronously with the rotating shaft, the unlocking mechanism is sleeved on the rotating shaft, the lock hook is rotatably provided on the fixed bracket, and one end of the lock hook away from the rotating axis of the lock hook stops at the unlocking mechanism, and the lock hook has a mating state with the rotating shaft and a disengaged state with the rotating shaft. In the mating state, the rotating shaft is fixed relative to the fixed bracket, and in the disengaged state, the rotating shaft is rotatable relative to the fixed bracket, and the driving mechanism is connected to the fixed bracket for driving the unlocking mechanism to rotate, and the unlocking mechanism has a first position, a second position and a third position, and the second position is between the first position and the third position. Between the three positions, in the first position the lock hook is in a mating state and the headrest is in an upright state. During the process of the unlocking mechanism rotating from the first position to the second position, the unlocking mechanism rotates relative to the rotating shaft, and the lock hook switches from the mating state to the disengaged state. In the second position, the lock hook is in a disengaged state and the headrest is in an upright state. During the process of the unlocking mechanism rotating from the second position to the third position, the unlocking mechanism and the rotating shaft rotate synchronously, and the lock hook is in a disengaged state. In the third position, the headrest is in a lying state and the lock hook is in a disengaged state, thereby realizing the transformation of the headrest from a vertical state to a lying state, and then realizing the folding of the headrest to meet the different needs of users for the headrest.

[0007] In some embodiments of the present invention, the unlocking mechanism also has a fourth position, which is located between the first position and the third position. During the process of the unlocking mechanism rotating from the third position to the fourth position, the unlocking mechanism rotates relative to the rotating shaft, and the lock hook is in the disengaged state. In the fourth position, the lock hook is in the disengaged state, and the headrest is in the lying state. During the process of the unlocking mechanism rotating from the fourth position to the first position, the unlocking mechanism and the rotating shaft rotate synchronously, and the lock hook is converted from the disengaged state to the engaged state.

[0008] In some embodiments of the present invention, the unlocking mechanism includes an unlocking wheel and a driving wheel, and the unlocking wheel and the driving wheel are arranged along the axial direction of the rotating shaft. The unlocking wheel and the driving wheel are both mounted on the rotating shaft and rotate synchronously. The driving wheel is connected to the driving mechanism, and an unlocking protrusion is provided on the unlocking wheel, and the lock hook abuts against the unlocking protrusion.

[0009] In some embodiments of the present invention, the unlocking protrusion extends along the circumferential direction of the unlocking wheel. Along the circumferential direction of the unlocking wheel, the unlocking protrusion includes a first section. Along the direction from the second position to the first position, the distance between the outer peripheral wall of the first section and the rotating shaft gradually increases. When the unlocking mechanism moves from the first position to the second position, the locking hook stops at the first section.

[0010] In some embodiments of the present invention, the end of the lock hook that faces away from the rotation axis of the lock hook has a locking protrusion, and the rotating shaft has a locking groove that cooperates with the locking protrusion. When the lock hook is in the engaged state, the locking protrusion is located in the locking groove, and when the lock hook is in the disengaged state, the locking protrusion is separated from the locking groove.

[0011] In some embodiments of the present invention, the rotating shaft is provided with a limiting wheel, the limiting wheel is connected to the rotating shaft and rotates synchronously, and the locking groove is provided on the limiting wheel.

[0012] In some embodiments of the present invention, along the circumferential direction of the unlocking wheel, the unlocking protrusion also includes a second section and a third section, and along the direction from the first position to the second position, the third section, the second section and the first section are arranged in sequence, and along the circumferential direction of the unlocking wheel, the distance between the outer peripheral wall of the second section and the axis of the rotating shaft remains unchanged, and the distance between the outer peripheral wall of the third section and the axis of the rotating shaft is smaller than the distance between the outer peripheral wall of the second section and the axis of the rotating shaft and smaller than the distance between the outer peripheral wall of the limiting wheel and the axis of the rotating shaft. In the process of the unlocking mechanism moving from the second position to the third position, the locking hook first stops with the second section and then stops with the limiting wheel.

[0013] In some embodiments of the present invention, a driving groove extending along the circumferential direction of the driving wheel is provided on the driving wheel, a fastener is provided on the outer peripheral wall of the rotating shaft, the fastener is located in the driving groove, the length of the driving groove along the circumferential direction of the rotating shaft is greater than the fastener, and during the process of the unlocking mechanism rotating from the first position to the second position, the fastener moves from the front end to the rear end of the driving groove along the rotation direction.

[0014] In some embodiments of the present invention, the driving wheel includes a first wheel, a second wheel and a third wheel arranged along the axial direction of the rotating shaft, the driving mechanism drives the second wheel to rotate, the first wheel and the third wheel are respectively located on both sides of the axial direction of the second wheel and are connected to the second wheel, the unlocking wheel is connected to the first wheel, and the first wheel and the third wheel are both provided with the driving groove, and there are two fasteners, and the two fasteners are respectively located in the two driving grooves.

[0015] In some embodiments of the present invention, the rotating shaft has a limiting protrusion, and in the third position, the locking hook abuts against the limiting protrusion to limit the rotation of the rotating shaft.

[0016] In some embodiments of the present invention, the invention further includes: a first torsion spring, which is arranged between the lock hook and the fixed bracket and is used to drive the end of the lock hook away from the lock hook rotation axis to rotate toward the rotation axis of the rotating shaft.

[0017] In some embodiments of the present invention, the lock hook has a fixing groove, one end of the first torsion spring is disposed in the fixing groove, and the fixing groove is located between the two ends of the lock hook in the length direction.

[0018] In some embodiments of the present invention, a leaf spring and a damping block are further included, wherein the leaf spring is connected to the fixed bracket, and opposite ends of the damping block are respectively abutted against the leaf spring and the rotating shaft, and the leaf spring is used to drive the damping block to move toward the rotating shaft.

[0019] In some embodiments of the present invention, the driving mechanism includes: a driving motor, which is arranged on the fixed bracket; a gear assembly, which is connected to the fixed bracket, and the driving motor drives the gear assembly to rotate, and the gear assembly drives the unlocking mechanism to rotate.

[0020] A vehicle according to an embodiment of the present invention includes the above-mentioned headrest assembly.

[0021] According to an embodiment of the present invention, a vehicle is provided with a headrest assembly, a rotating shaft is rotatably provided on a fixed bracket, the headrest is connected to the rotating shaft and rotates synchronously with the rotating shaft, an unlocking mechanism is sleeved on the rotating shaft, a lock hook is rotatably provided on the fixed bracket, one end of the lock hook away from the rotation axis of the lock hook is stopped by the unlocking mechanism, the lock hook has a mating state with the rotating shaft and a disengaged state with the rotating shaft, in the mating state, the rotating shaft is fixed relative to the fixed bracket, in the disengaged state, the rotating shaft is rotatable relative to the fixed bracket, a driving mechanism is connected to the fixed bracket, and is used to drive the unlocking mechanism to rotate, and the unlocking mechanism has a first position, a second position and a third position, and the second position is located at the first position. and the third position. In the first position, the lock hook is in a mating state and the headrest is in an upright state. During the process of the unlocking mechanism rotating from the first position to the second position, the unlocking mechanism rotates relative to the rotating shaft, and the lock hook is converted from the mating state to the disengaged state. In the second position, the lock hook is in a disengaged state and the headrest is in an upright state. During the process of the unlocking mechanism rotating from the second position to the third position, the unlocking mechanism and the rotating shaft rotate synchronously, and the lock hook is in a disengaged state. In the third position, the headrest is in a lying state and the lock hook is in a disengaged state, thereby realizing the transformation of the headrest from the upright state to the lying state, and then realizing the folding of the headrest to meet the different needs of users for the headrest.

[0022] Additional aspects and advantages of the present invention will be set forth in part in the description which follows and, in part, will be obvious from the description which follows, or may be learned by practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the following description of the embodiments with reference to the accompanying drawings, in which:

[0024] Figure 1 is a perspective view of a headrest assembly according to an embodiment of the present invention;

[0025] Figure 2 is a perspective view of a headrest assembly according to an embodiment of the present invention, wherein the fixing bracket is not shown;

[0026] Figure 3 is a partial perspective view of a headrest assembly according to an embodiment of the present invention, wherein the unlocking mechanism is located in a first position;

[0027] Figure 4 is a partial perspective view of a headrest assembly according to an embodiment of the present invention, wherein the unlocking mechanism is located in a second position;

[0028] Figure 5 yes Figure 4 Enlarged view of point A in the middle;

[0029] Figure 6 3D is a partial perspective view of a headrest assembly according to an embodiment of the present invention, wherein the unlocking mechanism is located in the third position.

[0030] Reference numerals:

[0031] 100. Headrest assembly;

[0032] 1. Fix the bracket;

[0033] 2. Rotating shaft; 21. Limiting wheel; 211. Locking groove; 212. Limiting protrusion; 22. Fastener;

[0034] 3. Headrest; 31. Headrest bracket;

[0035] 4. Unlocking mechanism; 41. Unlocking wheel; 411. Unlocking protrusion; 4111. First section; 4112. Second section; 4113. Third section; 42. Driving wheel; 421. First wheel; 4211. Driving slot; 422. Second wheel; 423. Third wheel;

[0036] 5. Lock hook; 51. Locking protrusion; 52. Fixing slot;

[0037] 6. Driving mechanism; 61. Driving motor; 62. Gear assembly; 63. Worm;

[0038] 7. First torsion spring;

[0039] 81. Leaf spring; 82. Damping block;

[0040] 9. Second torsion spring. DETAILED DESCRIPTION

[0041] The following describes embodiments of the present invention in detail. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention and are not to be construed as limiting the present invention.

[0042] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, features defined as "first" or "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0043] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0044] The headrest assembly 100 according to an embodiment of the present invention will be described below with reference to the accompanying drawings.

[0045] like Figures 1-6 As shown, a headrest assembly 100 according to one embodiment of the present invention includes a fixing bracket 1 , a rotating shaft 2 , a headrest 3 , an unlocking mechanism 4 , a locking hook 5 and a driving mechanism 6 .

[0046] Among them, the rotating shaft 2 is rotatably provided on the fixed bracket 1, the headrest 3 is connected to the rotating shaft 2 and rotates synchronously with the rotating shaft 2, the unlocking mechanism 4 is sleeved on the rotating shaft 2, the lock hook 5 is rotatably provided on the fixed bracket 1, and one end of the lock hook 5 away from the rotating axis of the lock hook 5 stops against the unlocking mechanism 4, and the lock hook 5 has a mating state with the rotating shaft 2 and a disengaged state disengaged from the rotating shaft 2. In the mating state, the rotating shaft 2 is fixed relative to the fixed bracket 1, and in the disengaged state, the rotating shaft 2 is rotatable relative to the fixed bracket 1. The driving mechanism 6 is connected to the fixed bracket 1 for driving the unlocking mechanism 4 to rotate. The unlocking mechanism 4 has a first position and a second position. The first position is located between the first and third positions. In the first position, the lock hook 5 is in a mating state and the headrest 3 is in an upright state. During the process of the unlocking mechanism 4 rotating from the first position to the second position, the unlocking mechanism 4 rotates relative to the rotating shaft 2, and the lock hook 5 is converted from the mating state to the disengaged state. In the second position, the lock hook 5 is in a disengaged state and the headrest 3 is in an upright state. During the process of the unlocking mechanism 4 rotating from the second position to the third position, the unlocking mechanism 4 and the rotating shaft 2 rotate synchronously, and the lock hook 5 is in a disengaged state. In the third position, the headrest 3 is in a lying state and the lock hook 5 is in a disengaged state.

[0047] It can be understood that when the headrest 3 is in a vertical state, the lock hook 5 is in a mating state with the rotating shaft 2, and the unlocking mechanism 4 is in the first position, the headrest 3 can support the passenger's head, provide a comfortable sitting feeling for the passenger, and reduce neck injuries caused to the passenger in the event of an accident while the vehicle is driving.

[0048] The unlocking mechanism 4 is driven to rotate by the driving mechanism 6 so as to rotate from the first position to the second position. During the rotation of the unlocking mechanism 4, the unlocking mechanism 4 rotates relative to the rotating shaft 2 and converts the engagement state of the lock hook 5 with the rotating shaft 2 to a disengaged state. When the unlocking mechanism 4 rotates to the second position, the lock hook 5 is disengaged from the rotating shaft 2. At this time, the headrest 3 is still in the upright state. The unlocking mechanism 4 is further driven to rotate by the driving mechanism 6 so as to rotate from the first position to the third position. During the rotation of the unlocking mechanism 4, the lock hook 5 continues to be disengaged. The unlocking mechanism 4 and the rotating shaft 2 rotate synchronously to drive the headrest 3 to convert from the upright state to the lying state. When the unlocking mechanism 4 rotates to the third position, the headrest 3 is in the lying state, thereby converting the headrest 3 from the upright state to the lying state, and further realizing the folding of the headrest 3 to meet the different needs of the user for the headrest 3.

[0049] At the same time, the rotating shaft 2 drives the headrest 3 to rotate synchronously, ensuring the stability of the headrest 3 during the process of the unlocking mechanism 4 driving the rotating shaft 2 to drive the headrest 3 to rotate, thereby improving the reliability of the headrest assembly 100. In addition, the end of the lock hook 5 that is away from the rotation axis of the lock hook 5 abuts against the unlocking mechanism 4, ensuring that the lock hook 5 and the rotating shaft 2 transition from the engaged state to the disengaged state during the process of the unlocking mechanism 4 rotating from the first position to the second position.

[0050] Furthermore, the headrest 3 includes two headrest brackets 31 , and the two headrest brackets 31 are rotatably connected to both ends of the rotating shaft 2 in the length direction, so that the rotating shaft 2 drives the headrest 3 to rotate synchronously.

[0051] According to the headrest assembly 100 of the embodiment of the present invention, the rotating shaft 2 is rotatably provided on the fixed bracket 1, the headrest 3 is connected to the rotating shaft 2 and rotates synchronously with the rotating shaft 2, the unlocking mechanism 4 is sleeved on the rotating shaft 2, the lock hook 5 is rotatably provided on the fixed bracket 1, and the end of the lock hook 5 away from the rotating axis of the lock hook 5 is stopped by the unlocking mechanism 4, and the lock hook 5 has a mating state with the rotating shaft 2 and a disengaged state disengaged from the rotating shaft 2. In the mating state, the rotating shaft 2 is fixed relative to the fixed bracket 1, and in the disengaged state, the rotating shaft 2 is rotatable relative to the fixed bracket 1. The driving mechanism 6 is connected to the fixed bracket 1 for driving the unlocking mechanism 4 to rotate, and the unlocking mechanism 4 has a first position, a second position and a third position. The second position is located at the first position. Between the first position and the third position, in the first position the lock hook 5 is in a mating state, and the headrest 3 is in an upright state. During the process of the unlocking mechanism 4 rotating from the first position to the second position, the unlocking mechanism 4 rotates relative to the rotating shaft 2, and the lock hook 5 is converted from the mating state to the disengaged state. In the second position, the lock hook 5 is in a disengaged state, and the headrest 3 is in an upright state. During the process of the unlocking mechanism 4 rotating from the second position to the third position, the unlocking mechanism 4 and the rotating shaft 2 rotate synchronously, and the lock hook 5 is in a disengaged state. In the third position, the headrest 3 is in a lying state, and the lock hook 5 is in a disengaged state, thereby realizing the transformation of the headrest 3 from the vertical state to the lying state, and then realizing the folding of the headrest 3 to meet the different needs of users for the headrest 3.

[0052] In some embodiments of the present invention, the unlocking mechanism 4 also has a fourth position, which is located between the first position and the third position. During the process of the unlocking mechanism 4 rotating from the third position to the fourth position, the unlocking mechanism 4 rotates relative to the rotating shaft 2, and the lock hook 5 is in a disengaged state. In the fourth position, the lock hook 5 is in a disengaged state, and the headrest 3 is in a lying state. During the process of the unlocking mechanism 4 rotating from the fourth position to the first position, the unlocking mechanism 4 and the rotating shaft 2 rotate synchronously, and the lock hook 5 is converted from a disengaged state to a engaged state.

[0053] Thus, the unlocking mechanism 4 is driven by the driving mechanism 6 to rotate in the opposite direction, so that the unlocking mechanism 4 rotates from the third position to the fourth position. During the rotation of the unlocking mechanism 4, the lock hook 5 is in a disengaged state. The unlocking mechanism 4 drives the rotating shaft 2 to rotate to drive the headrest 3 to switch from the lying state to the vertical state. When the unlocking mechanism 4 rotates to the fourth position, the headrest 3 is in the vertical state. The driving mechanism 6 continues to drive the unlocking mechanism 4 to continue to rotate in the opposite direction, so that the unlocking mechanism 4 rotates from the fourth position to the first position. During the rotation of the unlocking mechanism 4, the headrest 3 is in the vertical state. The rotating shaft 2 rotates relative to the rotating shaft 2 and switches the disengaged state of the lock hook 5 and the rotating shaft 2 to the engaged state. When the unlocking mechanism 4 rotates to the first position, the lock hook 5 and the rotating shaft 2 are engaged, and the headrest 3 is in the vertical state, thereby achieving the transition of the headrest 3 from the lying state to the vertical state, and then achieving the reset of the headrest 3, further improving the reliability of the headrest assembly 100.

[0054] It should be noted that the fourth position of the unlocking mechanism 4 can be between the second position and the third position, or between the second position and the first position, or the fourth position of the unlocking mechanism 4 is the same as the second position, and there is no limitation here.

[0055] In some embodiments of the present invention, Figure 3-Figure 6 As shown, the unlocking mechanism 4 includes an unlocking wheel 41 and a driving wheel 42. The unlocking wheel 41 and the driving wheel 42 are arranged along the axial direction of the rotating shaft 2. The unlocking wheel 41 and the driving wheel 42 are both sleeved on the rotating shaft 2 and rotate synchronously. The driving wheel 42 is connected to the driving mechanism 6. The unlocking wheel 41 is provided with an unlocking protrusion 411, and the lock hook 5 abuts against the unlocking protrusion 411. Therefore, when the unlocking wheel 41 rotates from the first position to the second position, the driving wheel 42 is driven by the driving mechanism 6 to rotate, thereby driving the unlocking wheel 41 to rotate synchronously, so that the unlocking protrusion 411 can switch the lock hook 5 and the rotating shaft 2 from the engaged state to the disengaged state.

[0056] In some embodiments of the present invention, Figure 3-Figure 6 As shown, the unlocking protrusion 411 extends along the circumferential direction of the unlocking wheel 41. Along the circumferential direction of the unlocking wheel 41, the unlocking protrusion 411 includes a first section 4111. Along the direction from the second position to the first position, the distance between the outer peripheral wall of the first section 4111 and the rotating shaft 2 gradually increases. When the unlocking mechanism 4 moves from the first position to the second position, the locking hook 5 stops at the first section 4111.

[0057] Therefore, in the process of the unlocking wheel 41 rotating from the first position to the second position, the distance between the outer peripheral wall of the first section 4111 and the rotating shaft 2 is gradually increased in the direction from the second position to the first position, so that the part where the locking hook 5 and the locking protrusion 51 are stopped is rotated toward the axis of the rotating shaft 2 away from the rotating shaft 2, thereby realizing the rotation of the locking hook 5 and the rotating shaft 2 from the engaged state to the disengaged state, further improving the reliability of the headrest assembly 100.

[0058] In some embodiments of the present invention, Figure 3-Figure 6 As shown, the end of the lock hook 5 that is away from the rotation axis of the lock hook 5 has a locking protrusion 51, and the rotating shaft 2 has a locking groove 211 that cooperates with the locking protrusion 51. When the lock hook 5 is in the engaged state, the locking protrusion 51 is located in the locking groove 211, and when the lock hook 5 is in the disengaged state, the locking protrusion 51 is separated from the locking groove 211.

[0059] It can be understood that when the unlocking mechanism 4 is in the first position, the locking protrusion 51 is located in the locking groove 211 so that the lock hook 5 has a mating state with the rotating shaft 2. In the process of the unlocking mechanism 4 rotating from the first position to the second position, the first section 4111 of the unlocking protrusion 411 pushes the lock hook 5 and the part where the locking protrusion 51 stops to rotate toward the axis of the rotating shaft 2 away from the rotating shaft 2, so that when the unlocking mechanism 4 is in the second position, the locking protrusion 51 is separated from the locking groove 211 so that the lock hook 5 has a disengaged state from the rotating shaft 2.

[0060] In some embodiments of the present invention, Figure 3-Figure 6 As shown, the rotating shaft 2 has a limiting wheel 21, which is connected to the rotating shaft 2 and rotates synchronously, and a locking groove 211 is provided on the limiting wheel 21. Therefore, this arrangement facilitates the engagement of the locking protrusion 51 with the locking groove 211 provided on the limiting wheel 21, further improving the reliability of the headrest assembly 100.

[0061] In some embodiments of the present invention, Figure 3-Figure 6 As shown, along the circumferential direction of the unlocking wheel 41, the unlocking protrusion 411 also includes a second section 4112 and a third section 4113. Along the direction from the first position to the second position, the third section 4113, the second section 4112 and the first section 4111 are arranged in sequence. Along the circumferential direction of the unlocking wheel 41, the distance between the outer peripheral wall of the second section 4112 and the axis of the rotating shaft 2 remains unchanged, and the distance between the outer peripheral wall of the third section 4113 and the axis of the rotating shaft 2 is smaller than the distance between the outer peripheral wall of the second section 4112 and the axis of the rotating shaft 2 and smaller than the distance between the outer peripheral wall of the limiting wheel 21 and the axis of the rotating shaft 2. In the process of the unlocking mechanism 4 moving from the second position to the third position, the locking hook 5 first stops with the second section 4112 and then stops with the limiting wheel 21.

[0062] Thus, the arrangement of the first section 4111 allows the lock hook 5 to switch from the engaged state to the disengaged state during the rotation of the unlocking mechanism 4 from the first position to the second position. During the rotation of the unlocking mechanism 4 from the second position to the third position, the distance between the outer circumferential wall of the second section 4112 and the axis of the rotating shaft 2 remains unchanged, and the lock hook 5 abuts against the second section 4112 to ensure that the lock hook 5 is in the disengaged state. The distance between the outer circumferential wall of the third section 4113 and the axis of the rotating shaft 2 is smaller than the distance between the outer circumferential wall of the second section 4112 and the axis of the rotating shaft 2 and smaller than the distance between the outer circumferential wall of the limiting wheel 21 and the axis of the rotating shaft 2, so that the lock hook 5 abuts against the limiting wheel 21 after abutting against the second section 4112, further ensuring that the lock hook 5 is in the disengaged state.

[0063] During the rotation of the unlocking mechanism 4 from the third position to the fourth position, the distance between the outer circumferential wall of the third section 4113 and the axis of the rotating shaft 2 is smaller than the distance between the outer circumferential wall of the second section 4112 and the axis of the rotating shaft 2, and smaller than the distance between the outer circumferential wall of the limiting wheel 21 and the axis of the rotating shaft 2. This allows the locking hook 5 to first abut against the limiting wheel 21, then against the third section 4113, and finally against the second section 4112, thereby ensuring that the locking hook 5 is in a disengaged state. During the rotation of the unlocking mechanism 4 from the fourth position to the first position, the distance between the outer circumferential wall of the first section 4111 and the rotating shaft 2 gradually increases from the second position to the first position, causing the locking protrusion 51 to move toward the axis of the rotating shaft 2 closer to the rotating shaft 2 until the locking protrusion 51 is located within the locking groove 211. This ensures that the locking hook 5 is in a mating state with the rotating shaft 2 when the unlocking mechanism 4 is in the first position.

[0064] At the same time, the headrest assembly 100 of the present invention has a simple structure and occupies less space in the vehicle while achieving folding of the headrest 3 .

[0065] In some embodiments of the present invention, Figure 3-Figure 6 As shown, a driving groove 4211 extending along the circumferential direction of the driving wheel 42 is provided on the driving wheel 42, and a fastener 22 is provided on the outer peripheral wall of the rotating shaft 2. The fastener 22 is located in the driving groove 4211. The length of the driving groove 4211 along the circumferential direction of the rotating shaft is greater than the fastener 22. When the unlocking mechanism 4 rotates from the first position to the second position, the fastener 22 moves from the front end of the driving groove 4211 to the rear end along the rotation direction.

[0066] Therefore, during the process of the unlocking mechanism 4 rotating from the first position to the second position, the fastener 22 moves from the front end to the rear end along the rotation direction of the driving groove 4211, so that during the process of the unlocking mechanism 4 rotating from the second position to the third position, the fastener 22 is pushed to rotate by the unlocking mechanism 4, thereby realizing the synchronous rotation of the rotating shaft 2 with the unlocking mechanism 4, and then realizing the rotation of the headrest 3 from the vertical state to the lying state.

[0067] At the same time, in the process of the unlocking mechanism 4 rotating from the third position to the fourth position, the fastener 22 first moves from the rear end of the driving slot 4211 along the rotation direction to the front end. At this time, the headrest 3 is in a lying state. When the fastener 22 moves to the front end, the unlocking mechanism 4 pushes the fastener 22 to rotate, thereby realizing the synchronous rotation of the rotating shaft 2 with the unlocking mechanism 4, and then realizing the headrest 3 from the lying state to the vertical state.

[0068] In some embodiments of the present invention, Figure 3-Figure 6 As shown, the drive wheel 42 includes a first wheel 421, a second wheel 422, and a third wheel 423 arranged along the axial direction of the rotating shaft 2. The drive mechanism 6 drives the second wheel 422 to rotate. The first wheel 421 and the third wheel 423 are respectively located on either side of the second wheel 422 in the axial direction and are connected to the second wheel 422. The unlocking wheel 41 is connected to the first wheel 421. The first wheel 421 and the third wheel 423 are each provided with a drive groove 4211. There are two fasteners 22, and the two fasteners 22 are respectively located in the two drive grooves 4211. Thus, the second wheel 422 is driven to rotate by the drive mechanism 6, so that the first wheel 421 and the third wheel 423 rotate synchronously. The provision of two fasteners 22 respectively located in the two drive grooves 4211 further ensures the reliability of the unlocking mechanism 4 and the rotating shaft 2 in synchronous rotation, thereby improving the reliability of the headrest assembly 100.

[0069] In some embodiments of the present invention, Figure 3-Figure 6 As shown, the rotating shaft 2 has a limiting protrusion 212. In the third position, the locking hook 5 abuts against the limiting protrusion 212 to limit the rotation of the rotating shaft 2. It will be appreciated that when the unlocking mechanism 4 is in the third position, the headrest 3 is in a lying position. To ensure that the headrest 3 remains in the lying position, the limiting protrusion 212 is provided on the rotating shaft 2 to abut against the locking hook 5 to limit further rotation of the rotating shaft 2 with the unlocking mechanism 4, thereby improving the reliability of the headrest assembly 100.

[0070] Furthermore, the rotating shaft 2 is provided with a limiting wheel 21, which is connected to the rotating shaft 2 and rotates synchronously therewith. A locking groove 211 and a limiting protrusion 212 are provided on the limiting wheel 21 and are spaced apart along the circumference of the limiting wheel 21. Thus, this arrangement facilitates the engagement of the locking protrusion 51 with the locking groove 211 provided on the limiting wheel 21, and the abutment of the limiting protrusion 212 with the locking hook 5, thereby further improving the reliability of the headrest assembly 100.

[0071] In some embodiments of the present invention, Figure 2-Figure 6As shown, the headrest assembly 100 further includes a first torsion spring 7. The first torsion spring 7 is disposed between the lock hook 5 and the fixing bracket 1 and is configured to drive the end of the lock hook 5, which is away from the rotation axis of the lock hook 5, to rotate toward the rotation axis of the rotating shaft 2. Thus, during the rotation of the unlocking mechanism 4 from the fourth position to the first position, the first torsion spring 7 drives the end of the lock hook 5, which is away from the rotation axis of the lock hook 5, to rotate toward the rotation axis of the rotating shaft 2, thereby engaging the lock hook 5 with the rotating shaft 2.

[0072] Specifically, in the process of the unlocking mechanism 4 rotating from the fourth position to the first position, the distance between the outer peripheral wall of the first section 4111 and the rotating shaft 2 is gradually increased in the direction from the second position to the first position, and the first torsion spring 7 is set, so that the locking protrusion 51 moves toward the axial direction of the rotating shaft 2 close to the rotating shaft 2 until the locking protrusion 51 is located in the locking groove 211, thereby achieving that when the unlocking mechanism 4 is in the first position, the locking hook 5 and the rotating shaft 2 are in a mating state.

[0073] In some embodiments of the present invention, Figure 2-Figure 6 As shown, the lock hook 5 has a fixing slot 52, within which one end of the first torsion spring 7 is disposed. The fixing slot 52 is located between the two ends of the lengthwise direction of the lock hook 5. Thus, the provision of the fixing slot 52 facilitates the first torsion spring 7 to be positioned on the lock hook 5, thereby driving the end of the lock hook 5 away from the rotation axis of the lock hook 5 to rotate toward the rotation axis of the rotating shaft 2. Furthermore, the fixing slot 52 limits the first torsion spring 7 along the lengthwise direction of the lock hook 5, further improving its reliability.

[0074] In some embodiments of the present invention, Figure 1 and Figure 2 As shown, the headrest 3 further includes a leaf spring 81 and a damping block 82. The leaf spring 81 is connected to the fixed bracket 1, and the opposite ends of the damping block 82 are respectively abutted against the leaf spring 81 and the rotating shaft 2. The leaf spring 81 is used to drive the damping block 82 to move toward the rotating shaft 2. Thus, the leaf spring 81 drives the damping block 82 to move toward the rotating shaft 2. Friction is generated between the damping block 82 and the rotating shaft 2, so that the rotating shaft 2 drives the headrest 3 to switch between the upright state and the lying state, eliminating the problem of the headrest 3 shaking due to the fitting clearance caused by the manufacturing deviation, further improving the stability of the headrest 3 during the movement process, and enhancing the user experience.

[0075] In some embodiments of the present invention, Figure 1 and Figure 2As shown, the drive mechanism 6 includes a drive motor 61 and a gear assembly 62. The drive motor 61 is mounted on the fixed bracket 1, and the gear assembly 62 is connected to the fixed bracket 1. The drive motor 61 drives the gear assembly 62 to rotate, which in turn drives the unlocking mechanism 4 to rotate. Thus, the drive motor 61 drives the gear assembly 62 to rotate, which in turn drives the unlocking mechanism 4 to rotate, thereby enabling the drive mechanism 6 to drive the unlocking mechanism 4 to rotate.

[0076] Furthermore, the drive mechanism 6 further includes a worm 63. The output end of the drive motor 61 is rotationally connected to the worm 63, and the worm 63 rotates with the drive gear assembly 62. Thus, the drive motor 61 drives the worm 63 to rotate, the worm 63 drives the gear assembly 62 to rotate, and the gear assembly 62 drives the unlocking mechanism 4 to rotate, thereby achieving the drive mechanism 6 driving the unlocking mechanism 4 to rotate.

[0077] Furthermore, the driving wheel 42 includes a first wheel 421, a second wheel 422, and a third wheel 423 arranged along the axial direction of the rotating shaft 2. The first wheel 421 and the third wheel 423 are respectively located on either side of the second wheel 422 in the axial direction and are connected to the second wheel 422. The gear assembly 62 drives the second wheel 422 to rotate. It should be noted that the gear assembly 62 can drive the second wheel 422 to rotate by either the output shaft of the gear assembly 62 being rotatably connected to the second wheel 422 or by the output gear of the gear assembly 62 being meshed with the second wheel 422.

[0078] In some embodiments of the present invention, Figure 2-Figure 3 As shown, the headrest assembly 100 also includes a second torsion spring 9, which is arranged between the rotating shaft 2 and the fixed bracket 1. Therefore, the second torsion spring 9 can eliminate the problem of the headrest 3 shaking due to the fitting gap caused by the manufacturing difference during the process of the rotating shaft 2 driving the headrest 3 to switch between the upright state and the lying state, thereby further improving the stability of the headrest 3 during the movement process and enhancing the user experience.

[0079] Next, a vehicle according to an embodiment of the present invention will be described.

[0080] A vehicle according to an embodiment of the present invention includes a headrest assembly 100 .

[0081] According to the vehicle of the embodiment of the present invention, a headrest assembly 100 is provided, the rotating shaft 2 is rotatably provided on the fixed bracket 1, the headrest 3 is connected to the rotating shaft 2 and rotates synchronously with the rotating shaft 2, the unlocking mechanism 4 is sleeved on the rotating shaft 2, the lock hook 5 is rotatably provided on the fixed bracket 1, and one end of the lock hook 5 away from the rotation axis of the lock hook 5 is stopped against the unlocking mechanism 4, and the lock hook 5 has a mating state with the rotating shaft 2 and a disengaged state disengaged from the rotating shaft 2. In the mating state, the rotating shaft 2 is fixed relative to the fixed bracket 1, and in the disengaged state, the rotating shaft 2 is rotatable relative to the fixed bracket 1. The driving mechanism 6 is connected to the fixed bracket 1 for driving the unlocking mechanism 4 to rotate, and the unlocking mechanism 4 has a first position, a second position and a third position. The second position is Between the first position and the third position, in the first position, the lock hook 5 is in a mating state and the headrest 3 is in an upright state. During the process of the unlocking mechanism 4 rotating from the first position to the second position, the unlocking mechanism 4 rotates relative to the rotating shaft 2, and the lock hook 5 switches from the mating state to the disengaged state. In the second position, the lock hook 5 is in a disengaged state and the headrest 3 is in an upright state. During the process of the unlocking mechanism 4 rotating from the second position to the third position, the unlocking mechanism 4 and the rotating shaft 2 rotate synchronously, and the lock hook 5 is in a disengaged state. In the third position, the headrest 3 is in a lying state and the lock hook 5 is in a disengaged state, thereby realizing the transformation of the headrest 3 from the upright state to the lying state, and then realizing the folding of the headrest 3 to meet the different needs of users for the headrest 3.

[0082] Throughout this specification, reference to terms such as "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples" means that a specific feature, structure, material, or characteristic described in conjunction with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, illustrative uses of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0083] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to the embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the claims and their equivalents.

Claims

1. A headrest assembly, characterized in that: include: Fixed bracket (1); A rotating shaft (2), the rotating shaft (2) being rotatably disposed on the fixed bracket (1); A headrest (3), the headrest (3) being connected to the rotating shaft (2) and rotating synchronously with the rotating shaft (2); An unlocking mechanism (4), wherein the unlocking mechanism (4) is sleeved on the rotating shaft (2); A lock hook (5), the lock hook (5) is rotatably provided on the fixed bracket (1), one end of the lock hook (5) that is away from the rotation axis of the lock hook (5) is abutted against the unlocking mechanism (4), the lock hook (5) has a mating state with the rotating shaft (2) and a disengaging state with the rotating shaft (2), in which the rotating shaft (2) is fixed relative to the fixed bracket (1), and in which the rotating shaft (2) is rotatable relative to the fixed bracket (1); a driving mechanism (6), the driving mechanism (6) being connected to the fixed bracket (1) and being used for driving the unlocking mechanism (4) to rotate, the unlocking mechanism (4) having a first position, a second position and a third position, the second position being between the first position and the third position, In the first position, the lock hook (5) is in the engaged state, and the headrest (3) is in the erected state. In the process of the unlocking mechanism (4) rotating from the first position to the second position, the unlocking mechanism (4) rotates relative to the rotating shaft (2), and the lock hook (5) is converted from the engaged state to the disengaged state. In the second position, the lock hook (5) is in the disengaged state, and the headrest (3) is in the erected state. In the process of the unlocking mechanism (4) rotating from the second position to the third position, the unlocking mechanism (4) and the rotating shaft (2) rotate synchronously, and the lock hook (5) is in the disengaged state. In the third position, the headrest (3) is in the lying state, and the lock hook (5) is in the disengaged state.

2. The headrest assembly according to claim 1, characterized in that: The unlocking mechanism (4) also has a fourth position, and the fourth position is located between the first position and the third position. During the process of the unlocking mechanism (4) rotating from the third position to the fourth position, the unlocking mechanism (4) rotates relative to the rotating shaft (2), and the lock hook (5) is in the disengaged state. In the fourth position, the lock hook (5) is in the disengaged state, and the headrest (3) is in the lying state. During the process of the unlocking mechanism (4) rotating from the fourth position to the first position, the unlocking mechanism (4) and the rotating shaft (2) rotate synchronously, and the lock hook (5) switches from the disengaged state to the engaged state.

3. The headrest assembly according to claim 1, characterized in that: The unlocking mechanism (4) comprises an unlocking wheel (41) and a driving wheel (42), the unlocking wheel (41) and the driving wheel (42) being arranged along the axial direction of the rotating shaft (2), the unlocking wheel (41) and the driving wheel (42) being sleeved on the rotating shaft (2) and rotating synchronously, the driving wheel (42) being connected to the driving mechanism (6), the unlocking wheel (41) being provided with an unlocking protrusion (411), and the locking hook (5) being in abutment with the unlocking protrusion (411).

4. The headrest assembly according to claim 3, characterized in that: The unlocking protrusion (411) extends along the circumferential direction of the unlocking wheel (41). Along the circumferential direction of the unlocking wheel (41), the unlocking protrusion (411) includes a first section (4111). Along the direction from the second position to the first position, the distance between the outer peripheral wall of the first section (4111) and the rotating shaft (2) gradually increases. When the unlocking mechanism (4) moves from the first position to the second position, the locking hook (5) stops at the first section (4111).

5. The headrest assembly according to claim 4, characterized in that: The end of the lock hook (5) facing away from the rotation axis of the lock hook (5) is provided with a locking protrusion (51), and the rotating shaft (2) is provided with a locking groove (211) that cooperates with the locking protrusion (51). When the lock hook (5) is in the engaged state, the locking protrusion (51) is located in the locking groove (211); when the lock hook (5) is in the disengaged state, the locking protrusion (51) is separated from the locking groove (211).

6. The headrest assembly according to claim 5, characterized in that: The rotating shaft (2) is provided with a limiting wheel (21), the limiting wheel (21) is connected to the rotating shaft (2) and rotates synchronously, and the locking groove (211) is provided on the limiting wheel (21).

7. The headrest assembly according to claim 6, characterized in that: Along the circumferential direction of the unlocking wheel (41), the unlocking protrusion (411) further includes a second section (4112) and a third section (4113). Along the direction from the first position to the second position, the third section (4113), the second section (4112) and the first section (4111) are arranged in sequence. Along the circumferential direction of the unlocking wheel (41), the distance between the outer peripheral wall of the second section (4112) and the axis of the rotating shaft (2) remains unchanged. The distance between the outer peripheral wall of the third section (4113) and the axis of the rotating shaft (2) is smaller than the distance between the outer peripheral wall of the second section (4112) and the axis of the rotating shaft (2) and smaller than the distance between the outer peripheral wall of the limiting wheel (21) and the axis of the rotating shaft (2). In the process of the unlocking mechanism (4) moving from the second position to the third position, the locking hook (5) first stops against the second section (4112) and then stops against the limiting wheel (21).

8. The headrest assembly according to claim 3, characterized in that: A driving groove (4211) extending along the circumferential direction of the driving wheel (42) is provided on the driving wheel (42); a fastener (22) is provided on the outer peripheral wall of the rotating shaft (2); the fastener (22) is located in the driving groove (4211); the length of the driving groove (4211) along the circumferential direction of the rotating shaft is greater than the fastener (22); and when the unlocking mechanism (4) rotates from the first position to the second position, the fastener (22) moves from the front end of the driving groove (4211) to the rear end along the rotation direction.

9. The headrest assembly according to claim 8, characterized in that: The driving wheel (42) comprises a first wheel (421), a second wheel (422) and a third wheel (423) arranged along the axial direction of the rotating shaft (2); the driving mechanism (6) drives the second wheel (422) to rotate; the first wheel (421) and the third wheel (423) are respectively located on both sides of the axial direction of the second wheel (422) and connected to the second wheel (422); the unlocking wheel (41) is connected to the first wheel (421); the first wheel (421) and the third wheel (423) are both provided with the driving groove (4211); there are two fasteners (22), and the two fasteners (22) are respectively located in the two driving grooves (4211).

10. The headrest assembly according to claim 1, characterized in that: The rotating shaft (2) has a limiting protrusion (212). In the third position, the locking hook (5) abuts against the limiting protrusion (212) to limit the rotation of the rotating shaft (2).

11. The headrest assembly according to claim 1, characterized in that: Also includes: A first torsion spring (7) is provided between the lock hook (5) and the fixed bracket (1) and is used to drive the end of the lock hook (5) away from the rotation axis of the lock hook (5) to rotate toward the rotation axis of the rotating shaft (2).

12. The headrest assembly according to claim 11, characterized in that: The lock hook (5) has a fixing groove (52), one end of the first torsion spring (7) is arranged in the fixing groove (52), and the fixing groove (52) is located between the two ends of the lock hook (5) in the length direction.

13. The headrest assembly according to claim 1, characterized in that: It also includes a leaf spring (81) and a damping block (82), wherein the leaf spring (81) is connected to the fixed bracket (1), and opposite ends of the damping block (82) are respectively abutted against the leaf spring (81) and the rotating shaft (2), and the leaf spring (81) is used to drive the damping block (82) to move toward the rotating shaft (2).

14. The headrest assembly according to claim 1, characterized in that: The driving mechanism (6) comprises: a driving motor (61), wherein the driving motor (61) is arranged on the fixing bracket (1); A gear assembly (62), the gear assembly (62) is connected to the fixed bracket (1), the driving motor (61) drives the gear assembly (62) to rotate, and the gear assembly (62) drives the unlocking mechanism (4) to rotate.

15. A vehicle, characterized in that: Comprising a headrest assembly according to any one of claims 1-14.

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