Linked unlocking mechanism for unlocking headrest

Abstract

A linked unlocking mechanism for unlocking a headrest, comprising: an unlocking handle (21), which is configured to rotate relative to the headrest (11) between a locking position in which the headrest (11) is locked and an unlocking position in which the headrest (11) is unlocked; and an unlocking member (22), which is configured to be movable relative to the headrest (11); when the unlocking member (22) moves in a first direction relative to the headrest (11), the unlocking member (22) is capable of pushing the unlocking handle (21) to rotate from the locking position to the unlocking position and passing over the unlocking handle (21), so that the unlocking handle (21) rotates back from the unlocking position to the locking position; and when the unlocking member (22) moves relative to the headrest (11) in a second direction opposite to the first direction to return to its original position, the unlocking handle (21) is maintained in the locking position. The present mechanism enables the headrest (11) to be automatically locked again after being unlocked, thereby avoiding the problem of the headrest (11) remaining in an active state after its position has been adjusted, which would otherwise result in a poor user experience.

Description

Linkage unlocking mechanism for unlocking the headrest Technical Field

[0001] This invention relates to the technical field of automobile seats, and specifically to a linkage unlocking mechanism for unlocking headrests. Background Technology

[0002] Car seats have many adjustable parts, such as the backrest, the armrest located in the middle of the rear seat, and the headrest, all of which can be rotated and adjusted. When the armrest is in the flat position, the headrest should ideally be folded to provide support for the armrest. However, current adjustment mechanisms can unlock the headrest but cannot lock it after folding. This means the headrest remains in an active position after being unlocked, thus failing to provide support for the armrest and resulting in a poor user experience. Summary of the Invention

[0003] The purpose of this invention is to overcome the shortcomings of the prior art and provide a linkage unlocking mechanism for unlocking headrests, thereby solving the problem that existing headrests cannot lock after unlocking, resulting in the headrests failing to support the armrests and causing a poor user experience.

[0004] The technical solution to achieve the above objectives is:

[0005] A linkage unlocking mechanism for unlocking a headrest is provided, comprising:

[0006] An unlocking handle is configured to rotate relative to the headrest between a locked position where the headrest is locked and an unlocked position where the headrest is unlocked;

[0007] An unlocking element, which is configured to be movable relative to the headrest;

[0008] When the unlocking component moves relative to the headrest in a first direction, it can push the unlocking handle to rotate from the locked position to the unlocked position and pass over the unlocking handle so that the unlocking handle rotates back from the unlocked position to the locked position; when the unlocking component moves relative to the headrest in a second direction opposite to the first direction, the unlocking handle remains in the locked position.

[0009] Furthermore, it also includes a stop portion installed on the headrest, the stop portion being configured to restrict the rotation of the unlocking member when the unlocking member moves relative to the headrest in a first direction, thereby allowing the unlocking handle to be pushed from the locked position to the unlocked position.

[0010] Furthermore, it also includes a first elastic element, one end of which is connected to the unlocking handle and the other end of which is connected to the headrest, for driving the unlocking handle to rotate from the unlocked position back to the locked position.

[0011] Furthermore, it also includes a cable, one end of which acts on the unlocking component and the other end of which is connected to the rotating object. As the rotating object rotates in a third direction, the cable is pulled, thereby pulling the unlocking component to move relative to the headrest in a first direction to unlock the headrest.

[0012] Furthermore, the rotating object is the armrest in the middle of the rear seat of the car or the backrest of the car seat, and the headrest is disposed on the rotating object.

[0013] Furthermore, the other end of the cable is eccentrically positioned relative to the rotation center of the rotating object, so that the cable can be pulled or released during the rotation of the rotating object.

[0014] Furthermore, it also includes a sliding member slidably mounted on the headrest; the unlocking member is rotatably mounted on the sliding member, one end of the cable is connected to the sliding member, and the unlocking member is moved relative to the headrest in a first direction by pulling the sliding member.

[0015] Furthermore, it also includes a second elastic element, one end of which is connected to the unlocking element and the other end of which is connected to the sliding element. The second elastic element generates a restoring force when the unlocking element rotates in a third direction, thereby applying a restoring force to the unlocking element after it disengages from the unlocking handle, so that the unlocking element rotates and resets in a fourth direction opposite to the third direction.

[0016] Furthermore, the unlocking component includes an unlocking part and a limiting part fixedly connected to the unlocking part;

[0017] When the unlocking member moves relative to the headrest in the first direction, the unlocking part can push the unlocking handle to rotate from the locked position to the unlocked position so that the unlocking member passes over the unlocking handle; at the same time, the limiting part contacts the sliding member to restrict the rotation of the unlocking part.

[0018] Furthermore, it also includes a third elastic element, one end of which is connected to the headrest and the other end of which is connected to the slider. The third elastic element generates a restoring force when the slider is pulled by the cable, thereby applying a restoring force to the slider when the cable is released so that the slider moves in the second direction.

[0019] Furthermore, during the rotation of the rotating object toward the third direction, the restoring force generated by the third elastic element is applied to the sliding element when the cable is released, so that the sliding element moves toward the second direction so that the unlocking element does not cross the unlocking handle. Thus, during the rotation of the rotating object toward the fourth direction opposite to the third direction, when the sliding element is pulled by the cable and moves toward the first direction, the unlocking element will not push the unlocking handle to rotate from the locked position to the unlocked position.

[0020] Furthermore, as the rotating object rotates in a fourth direction opposite to the third direction, the restoring force generated by the third elastic element is applied to the slider when the cable is released, causing the slider to move in the second direction so that the unlocking element passes the unlocking handle and returns to its initial position.

[0021] Furthermore, the headrest is provided with a groove corresponding to the sliding member, and the sliding member is slidably disposed in the groove.

[0022] Furthermore, the headrest is mounted on the rotating object via a headrest insert rod, and the cable portion passes through the headrest insert rod.

[0023] Furthermore, when the unlocking member moves relative to the headrest in the first direction, the unlocking part can push the unlocking handle to rotate from the locked position to the unlocked position so that the unlocking member passes over the unlocking handle; at the same time, the limiting part contacts the blocking part on the sliding member to restrict the rotation of the unlocking part, wherein the blocking part and the sliding member are separately formed and connected to each other, or are integrally formed.

[0024] Furthermore, the unlocking component includes an unlocking part and a limiting part fixedly connected to the unlocking part;

[0025] When the unlocking member moves relative to the headrest in the first direction, the unlocking part can push the unlocking handle to rotate from the locked position to the unlocked position so that the unlocking member passes over the unlocking handle; at the same time, the limiting part contacts the blocking part fixed on the headrest to restrict the rotation of the unlocking part.

[0026] Furthermore, the unlocking part and the limiting part of the unlocking member are respectively disposed on the pivot part of the unlocking member, and the pivot part is slidably engaged in the groove on the headrest.

[0027] The beneficial effects of the linkage unlocking mechanism for unlocking headrests in this invention are as follows:

[0028] The unlocking mechanism of this invention allows the unlocking component to push the unlocking handle to rotate from the locked position to the unlocked position, thereby unlocking the headrest. When pushing the unlocking handle to rotate, the unlocking component can pass over the handle, releasing the positional restriction and allowing the handle to rotate back to its original position, thus automatically locking the headrest. This allows the headrest to be locked after adjustment. When used with the armrest, the headrest provides reliable support, and when adjusting the armrest, simply moving the headrest back to its original position prevents movement, improving the user experience. When used with the backrest, the headrest can be unlocked and folded down when the backrest is rotated downwards to avoid collision with the seat in front. When adjusting the backrest, simply moving the headrest back to its original position prevents movement, further enhancing the user experience.

[0029] Furthermore, the movement adjustment of the unlocking component is carried out under the action of external force. When the unlocking component moves back to its original position, it can avoid the unlocking handle by rotating when it comes into contact with the unlocking handle, thus realizing the automatic return of the unlocking component without affecting the locking position of the unlocking handle. Attached Figure Description

[0030] Figure 1 is a three-dimensional structural diagram of the linkage unlocking mechanism of the present invention installed on a headrest.

[0031] Figure 2 is a partially enlarged schematic diagram of the linkage unlocking mechanism in Figure 1.

[0032] Figure 3 is a top view of the linkage unlocking mechanism in Figure 1.

[0033] Figure 4 is a side view of the linkage unlocking mechanism of the present invention installed on a headrest with one side baffle omitted.

[0034] Figure 5 is a schematic diagram of a part of the structure of a headrest used for driving the linkage unlocking mechanism of the present invention to unlock the headrest.

[0035] Figure 6 is a schematic diagram of the structure of another part of a headrest driven by the linkage unlocking mechanism of the present invention for unlocking the headrest.

[0036] Figure 7 is a schematic diagram of the exploded disassembly structure of the linkage unlocking mechanism for unlocking the headrest of the present invention installed on the core component shown in Figure 6.

[0037] Figures 8 to 10 are schematic diagrams illustrating the disassembled steps of the linkage unlocking mechanism for unlocking the headrest according to the present invention, which drives the unlocking handle to the unlocking position.

[0038] Figures 11 to 15 are schematic diagrams illustrating the disassembly steps of the linkage unlocking mechanism of the present invention for unlocking the headrest, in which the unlocking handle rotates from the unlocked position back to the locked position and the unlocking component automatically returns to its original position after the headrest is unlocked.

[0039] Figure 16 is a schematic diagram of the linkage unlocking mechanism of the present invention for unlocking the headrest, which is used for the armrest and the headrest.

[0040] Figure 17 is a magnified view of part A in Figure 16.

[0041] Figure 18 is a schematic diagram of the armrest structure of the linkage unlocking mechanism for unlocking the headrest according to the present invention.

[0042] Figure 19 is a schematic diagram of the handrail structure shown in Figure 18 in the flattened position.

[0043] Figures 20 to 23 are schematic diagrams illustrating the disassembly steps of adjusting the armrest from the starting position to the flat position in the linkage unlocking mechanism for unlocking the headrest according to the present invention.

[0044] Figures 24 and 25 are schematic diagrams showing the disassembled steps of the armrest returning to the starting position in the linkage unlocking mechanism for unlocking the headrest according to the present invention.

[0045] Figure 26 is a schematic diagram of the structure of the blocking part of the linkage unlocking mechanism for unlocking the headrest of the present invention, which is fixed on the headrest.

[0046] Figure Descriptions: 11-Headrest; 111-Headrest insert rod; 1111-Insertion section; 1112-Horizontal section; 1113-Transition section; 1114-Notch; 112-Slide groove; 113-Core component; 114-Headrest frame; 12-Rotating object; 121-Rotating bracket; 13-First elastic element; 14-Elastic element; 21-Unlocking handle; 22-Unlocking component; 221-Unlocking part; 222-Limiting part; 23-Pull cable; 24-Second elastic element; 25-Third elastic element; 26-Sliding component; 261-Blocking part. Detailed Implementation

[0047] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0048] Referring to Figure 1, this invention provides a linkage unlocking mechanism for unlocking a headrest. During the rotation and folding of the armrest in the middle of the rear seat or the backrest of the car seat, the unlocking handle 21 is pushed to the unlocking position to unlock the headrest 11. At this time, the headrest 11 automatically folds under the action of elastic elements such as torsion springs. Then, the unlocking handle 21 rotates from the unlocking position back to the locking position to lock the headrest 21. Thus, the headrest can remain in the folded state, providing support for the armrest when it is folded up, and avoiding contact with the front seat during the folding of the backrest. When adjusting the armrest and backrest, the headrest can be moved back to its original position, thereby improving the user experience. The linkage unlocking mechanism for unlocking the headrest of this invention will be described below with reference to the accompanying drawings.

[0049] Referring to Figure 1, a perspective view of the linkage unlocking mechanism for unlocking the headrest of the present invention installed on a headrest 11 is shown. Referring to Figure 2, a partially enlarged view of the linkage unlocking mechanism in Figure 1 is shown. Referring to Figure 4, a side view of the linkage unlocking mechanism for unlocking the headrest of the present invention installed on a headrest with one side baffle omitted is shown. The linkage unlocking mechanism for unlocking the headrest 11 of the present invention will be described below with reference to Figures 1, 2, and 4.

[0050] As shown in Figures 1, 2, and 4, the linkage unlocking mechanism for unlocking the headrest of the present invention includes an unlocking handle 21 and an unlocking member 22. The unlocking handle 21 is configured to rotate relative to the headrest 11 between a locked position and an unlocked position. As shown in Figure 8, the unlocking handle 21 is in the locked position. As shown in Figure 10, the unlocking handle 21 rotates from the locked position to the unlocked position under the push of the unlocking member 22. The unlocking member 22 is movable relative to the headrest 11. As shown in Figures 8 to 10, when the unlocking member 22 moves relative to the headrest 11 in a first direction F1 (i.e., from the perspective of the internal arrangement space of the headrest, it is more advantageous to arrange the unlocking member to move in the first direction to unlock), it can push the unlocking handle 21 to rotate from the locked position to the unlocked position. Furthermore, as shown in Figure 11, the unlocking member 22 can also move past the unlocking handle 21, so that the unlocking handle 21 rotates back from the unlocked position to the locked position. As shown in Figures 12 and 13, when the unlocking member 22 moves back to its original position relative to the headrest 11 in a second direction F2 opposite to the first direction F1, the unlocking handle 21 remains in the locked position.

[0051] The linkage unlocking mechanism of the present invention uses the movement of the unlocking member 22 to push the unlocking handle 21 to rotate, thereby unlocking the headrest. When unlocking the headrest 11, the headrest can automatically fold under the action of elastic elements such as torsion springs installed on it. The continued movement of the unlocking member 22 can pass over the unlocking handle 21, and then the unlocking handle can rotate from the unlocked position back to the locked position, thereby locking the headrest and allowing the headrest to maintain its current state.

[0052] In one specific embodiment of the present invention, a first elastic member 13 is also included. One end of the first elastic member 13 is connected to the unlocking handle 21 and the other end is connected to the headrest 11, for driving the unlocking handle 21 to rotate from the unlocked position back to the locked position.

[0053] The first elastic element 13 allows the unlocking handle 21 to reset and also ensures that when the unlocking member 22 moves back relative to the headrest 11, the unlocking handle 21 remains in the locked position, thus allowing the unlocking member 22 to rotate past the unlocking handle 21. Preferably, the first elastic element 13 can be an elastic element such as a torsion spring or a tension spring.

[0054] In one specific embodiment of the present invention, as shown in Figures 3, 4, and 7, a pull cable 23 is further included, one end of which acts on the unlocking member 22. Referring to Figures 16 and 17, the other end of the pull cable 23 is connected to the rotating object 12. As the rotating object 12 rotates in a third direction, the pull cable 23 is pulled, thereby pulling the unlocking member 22 relative to the headrest 11 in a first direction to unlock the headrest 11.

[0055] By setting a cable 23 to connect the rotating object 12 and the unlocking component 22, the rotation adjustment of the rotating object 12 is used to pull the unlocking component 22 to move, thus realizing the linkage between the rotating object 12 and the unlocking component 22.

[0056] Furthermore, the rotating object 12 is either the armrest in the middle of the rear seat of a car or the backrest of a car seat, and the headrest 11 is mounted on the rotating object 12. As shown in Figures 18 and 19, the headrest 11 is mounted on the rotating object 12. In this embodiment, the rotating object 12 is an armrest that can be rotated downwards to a flattened state. During rotation, the headrest can be unlocked by the linkage unlocking mechanism of the present invention, causing the headrest to fold over, and then locked again, allowing the headrest 11 to support the armrest in the flattened state. In addition, when adjusting the armrest to its original position, since the headrest is locked, it can be moved, i.e., manually moved, to return the armrest to its original position, improving the user experience.

[0057] When rotating object 12 is the seat back (not shown), the backrest can rotate forward to a flattened state to achieve backrest folding. During the backrest folding process, if the headrest 11 is not folded up, the headrest 11 may collide with the front seat back, hindering the backrest folding. The linkage unlocking mechanism for unlocking the headrest of the present invention is applied to the headrest, which can unlock the headrest during the backrest rotation and folding process, causing the headrest to fold (for example, the headrest on the backrest is basically vertically oriented before unlocking and folding down, and is closer to the backrest after unlocking, which can avoid interference with the front seat), and then lock the headrest 11 to prevent the headrest from being in a flexible state after folding. In addition, when adjusting the backrest return position, since the headrest is locked, it can be moved, that is, manually moved, to return the backrest to its original position, improving the user experience.

[0058] Furthermore, as shown in Figure 17, the other end of the cable 23 is eccentrically positioned relative to the rotation center of the rotating object 12, so that the cable 23 can be pulled or released during the rotation of the rotating object 12.

[0059] By using an eccentric setting, the armrest or backrest pulls a cable to unlock the headrest during adjustment as it rotates towards the front of the vehicle. If the other end of the cable is positioned at the center of rotation of the rotating object, the rotation of the object will not pull the cable. Specifically, the exact position of the eccentric setting can be set according to the required travel distance of the unlocking component 22.

[0060] A rotating bracket 121 is provided at the rotation center of the rotating object 12, and the other end of the cable 23 is provided on the rotating bracket 121.

[0061] Furthermore, as shown in Figures 2, 4, and 7, the device also includes a sliding member 26 slidably mounted on the headrest 11, and an unlocking member 22 rotatably mounted on the sliding member 26. One end of a cable 23 is connected to the sliding member 26, and pulling the sliding member 26 pulls the unlocking member 22 relative to the headrest 11 in a first direction.

[0062] The unlocking member 22 is installed by setting a slider 26. The slider 26 allows the unlocking member 22 to move and facilitates the setting of an elastic member for the unlocking member 22, thereby simultaneously enabling the unlocking member 22 to move and rotate relative to the headrest 11.

[0063] In one specific embodiment of the present invention, as shown in FIG4, a stop portion 261 is further included. The stop portion is mounted on the headrest. The stop portion 261 is configured to restrict the rotation of the unlocking member 22 when the unlocking member 22 moves relative to the headrest 11 in a first direction, thereby allowing the unlocking handle 21 to be pushed from the locked position to the unlocked position.

[0064] In some embodiments, the abutment 261 is fixed to the headrest (such as the headrest frame). The abutment 261 is supported by the limiting portion 222 of the unlocking member 22 to restrict the unlocking member 22 from rotating in a fourth direction opposite to the third direction. In this case, the slider 26 is omitted, and the cable 23 can be directly connected to the pivot portion 223 of the unlocking member 22. The pivot portion 223 of the unlocking member 22 is slidably (directly) engaged in a groove 112 on the headrest, for example, by having its two ends extend into elongated holes (not shown) on two baffles 120 (see FIG. 3, which define the groove 112), so that the unlocking member 22 can be pulled in a first direction F1 by the cable 23 or pushed in a second direction F2 by the third elastic member 112 with the aid of the groove. A torsion spring can be provided on the pivot portion 223 of the unlocking member 22 instead of the second elastic member 24 for resetting the unlocking member 22 to rotate in the fourth direction. The blocking part 261 is fixed to the unlocking handle 21 and supports the limiting part 222 below the limiting part 222 to prevent the unlocking member 22 from rotating in the fourth direction. This allows the unlocking member 22 to push the unlocking handle 21 into the unlocking position by its unlocking part 221 when it is pulled past the unlocking handle 21 in the first direction by the cable 23. The blocking part 261 can be designed to extend along the travel of the unlocking member 22 so as to always support the limiting part 222 during the movement of the unlocking member 22; or, the blocking part 261 can be designed to extend only substantially directly below the unlocking handle 21 (refer to the relative positional relationship between the blocking part 261 and the unlocking handle 21 shown in FIG9) so as to support the limiting part 222 only when the unlocking member 22 moves past the unlocking handle 21 in the first direction, thereby pushing the unlocking handle 21 into the unlocking position. For example, in this case, the torsion spring on the pivot part 223 can be designed to be in an unpre-tightened initial state and only tensioned when the unlocking member 22 rotates in the third direction. Referring to the embodiment shown in FIG26, the unlocking part 221 and the limiting part 222 of the unlocking member 22 can be respectively provided on both sides of the pivot part 223 of the unlocking member 22 in the lateral direction of the headrest, or they can be provided on the same side of the pivot part 223.

[0065] Preferably, the abutment 261 can be moved and adjusted relative to the headrest 11 together with the unlocking member 22. The abutment 261 can be provided on the sliding member 26 (for example, the two are separately constructed and connected to each other), and can cooperate with the corresponding structure on the headrest 11 to restrict the unlocking member 22 from rotating in the fourth direction. For example, a groove 112 is provided on the headrest 11 corresponding to the sliding member 26. The unlocking member 22 and the abutment 261 are installed on the sliding member 26 together. The sliding member 26 slides in the groove 112, and the abutment 261 can contact the bottom of the groove to restrict the unlocking member 22 from rotating in the fourth direction.

[0066] Preferably, the abutment 261 can be moved and adjusted relative to the headrest 11 together with the unlocking member 22. The abutment 261 can be integrally formed on the slider 26 to restrict the unlocking member 22 from rotating in the fourth direction. For example, a groove 112 is provided on the headrest 11 corresponding to the slider 26, and the slider 26 slides in the groove. The unlocking member 22 is rotatably mounted on the slider 26 and abuts against the abutment 261 to restrict the unlocking member 22 from rotating in the fourth direction.

[0067] Furthermore, it also includes a second elastic element 24, one end of which is connected to the unlocking member 22, and the other end is connected to the sliding member 26. As shown in Figures 11 to 15, the second elastic element 24 generates a restoring force when the unlocking member 22 rotates in a third direction, thereby applying a restoring force to the unlocking member 22 after it disengages from the unlocking handle 21, so that the unlocking member 22 rotates back to its original position in a fourth direction opposite to the third direction. In the embodiments shown in Figures 11 to 15, the second elastic element 24 is a tension spring. Of course, the second elastic element 24 is not limited to the structure of a tension spring; it can also be other elastic elements such as a torsion spring. For example, the torsion spring can be installed on the rotation shaft of the unlocking member 22. The function of the second elastic element 24 is to enable the rotation of the unlocking member 22 to automatically reset.

[0068] The second elastic element 24 is a helical spring. Referring to the state of the helical spring shown in Figure 8, when the helical spring is in a compressed state, it has a certain stiffness. At this time, the helical spring is supported by the limiting part, and thus it has the function of a blocking part. The blocking part does not need to be provided separately.

[0069] Furthermore, as shown in Figure 8, the unlocking member 22 includes an unlocking part 221 and a limiting part 222 fixedly connected to the unlocking part 221, for example, integrally formed. When the unlocking member 22 moves relative to the headrest 11 in the first direction, the unlocking part 221 can push the unlocking handle 21 to rotate from the locked position to the unlocked position, so that the unlocking member 22 passes over the unlocking handle 21; at the same time, the limiting part 222 contacts the sliding member 26, or the blocking part 261, to restrict the rotation of the unlocking part 221.

[0070] The unlocking part 221 is provided corresponding to the unlocking handle 21, and the limiting part 222 is provided corresponding to the sliding member 26 or the blocking part 261. The limiting part 222 is provided to restrict the rotation of the unlocking part 221 when the unlocking part 221 pushes the unlocking handle, but the limiting part 222 does not restrict the rotation adjustment of the unlocking part 221 during the return process.

[0071] Preferably, the unlocking part 221 and the limiting part 222 extend in opposite directions. A blocking part 261 is provided on the slider 26 corresponding to the limiting part 222. The blocking part 261 protrudes upward and its top can contact the limiting part 222, thereby restricting the unlocking part 22 from rotating in the fourth direction.

[0072] Furthermore, as shown in Figures 7 and 8, a third elastic element 25 is also included. One end of the third elastic element 25 abuts against the headrest 11, and the other end is connected to the sliding element 26. The third elastic element generates a restoring force when the sliding element 26 is pulled by the cable 23, thereby applying a restoring force to the sliding element 26 when the cable 23 is released, causing the sliding element 26 to move back to its original position in the second direction. The third elastic element 25 is preferably a spring, which is preferably sleeved on the corresponding portion of the cable 23. By providing the third elastic element 25, the movement of the sliding element can be automatically reset.

[0073] During the rotation of the rotating object 12 in a third direction, the restoring force generated by the third elastic element 25 is applied to the slider 26 when the cable 23 is released, so that the slider 26 moves in the second direction so that the unlocking element 22 does not cross the unlocking handle 21. Thus, during the rotation of the rotating object 12 in a fourth direction opposite to the third direction, when the slider 26 is pulled by the cable 23 and moves in the first direction (for example, during the transition from the state shown in FIG13 to the state shown in FIG14), the unlocking element 22 will not push the unlocking handle 21 from the locked position to the unlocked position.

[0074] As the rotating object 12 rotates in a fourth direction opposite to the third direction, the restoring force generated by the third elastic element 25 is applied to the slider 26 when the cable 23 is released, so that the slider 26 moves in the second direction, causing the unlocking element 22 to pass over the unlocking handle 21 and return to the initial position (e.g., during the transition from the state shown in FIG14 to the state shown in FIG15).

[0075] Furthermore, the travel of the cable 23 can be compensated by the energy storage travel of the third elastic element 25, thus eliminating the need for a compensation mechanism. Specifically, the cable 23 pulls the unlocking element 22 to rotate the unlocking handle 21 to the unlock position (unlocking the headrest). At this point, the cable 23 has not yet reached its limit position and can continue to move in the first direction, allowing the third elastic element 25 to continue storing energy (compressing or stretching). As long as the travel of the cable 23 does not exceed the limit of the third elastic element, the cable 23 will not break or bear a large tension. Due to the eccentric setting at the other end of the cable, the cable will not remain taut during the rotation of the object. For example, when the object rotates to the latter half of its travel, the cable will be relaxed.

[0076] In one preferred embodiment, when the cable 23 pulls the slider 26 to move, the slider 26 compresses the third elastic member 25 to generate a restoring force. When the cable 23 is released, the third elastic member 25 applies a restoring force to the slider 26 to return to its original state, causing the slider 26 to move back to its original position in the second direction, while simultaneously causing the cable 23 to return to its original position. In another preferred embodiment, the third elastic member 25 may be located on the other side of the slider 26. That is, when the cable 23 pulls the slider 26 to move, the slider 26 stretches the third elastic member 25 to generate a restoring force. When the cable 23 is released, the third elastic member 25 applies a restoring force to the slider 26 to return to its original state, causing the slider 26 to move back to its original position in the second direction, while simultaneously causing the cable 23 to return to its original position.

[0077] The cable can be reset from the moment the headrest is unlocked until the object is rotated and laid flat. During this process, the distance between the two ends of the cable will shorten, for example, by first lengthening and then shortening again.

[0078] Figures 8 to 15 illustrate the operation steps of the linkage unlocking mechanism for unlocking the headrest 11 of the present invention, which involves the rotating object being flipped downwards and flattened in a vertical position, and then similarly flipped back to the vertical position. The initial position of the unlocking member shown in Figure 8 corresponds to the initial state of the rotating object being vertically positioned. As shown in Figure 9, when the rotating object begins to flip downwards, the rotating bracket 121 drives the pull cable 23 to pull the sliding member 26, which slides in the first direction, causing the unlocking part 221 of the unlocking member 22 to abut against the unlocking handle 21. Figure 10 shows that when the pull cable 23 continues to pull the sliding member 26, the unlocking part 221 pushes the unlocking handle 21 to the unlocking position, at which point the headrest 11 is unlocked. The headrest flips after unlocking. Figure 11 shows that when the pull cable 23 continues to pull the sliding member 26, the unlocking part 221 passes over the unlocking handle 21, and the unlocking handle 21 returns to the locked position under the elastic action of the first elastic member 13, at which point the headrest is securely in the flipped-up state. Figure 12 shows the cable 23 continuing to pull the slider 26 forward, and the cable 23 reaching its limit position. Figure 13 shows the rotating object continuing to flip downwards to a flat state after the cable 23 reaches its limit position. At this time, the unlocking part 221 is on the side of the unlocking handle 21 away from the blocking part 261 in the locked position, or abutting against the side of the unlocking handle 21 away from the blocking part (Figure 13). Figure 14 shows the state when the rotating object flips upwards to reset, and the relative position of the unlocking part 221 and the unlocking handle 21 when the cable 23 reaches its limit position again. Referring to Figure 15, during the process of the rotating object flipping upwards and returning to the initial position, the unlocking part 221 rotates in a third direction and passes over the unlocking handle 21 to be positioned on the side of the unlocking handle 21 near the blocking part 261 (i.e., the initial state of the unlocking part 22). During the entire process of the rotating object flipping downwards to a flat state and then flipping upwards to the vertical initial state, the unlocking part 22 unlocks only once. After the headrest 11 is flipped over, during the process of rotating the object downwards or upwards, based on the locking mechanism of the headrest, the object can be flipped downwards or upwards accordingly by acting on the headrest 11 to obtain a better user experience.

[0079] Furthermore, as shown in Figures 1 and 2, the headrest 11 is provided with a groove 112 corresponding to the sliding member 26, and the sliding member 26 is slidably disposed in the groove 112. The groove cooperates with the sliding member to guide and limit the movement of the sliding member.

[0080] Preferably, the groove 112 can be formed on the headrest 11, for example, by recessing a corresponding portion of the headrest 11 inward to form the groove 112. Alternatively, the groove 112 can also be formed by providing a pair of baffles 120 on the headrest 11, i.e., the gap between the pair of baffles 120 forms the groove 112.

[0081] In one specific embodiment of the present invention, as shown in Figures 1, 2, 6, 7 and 14, the headrest 11 is mounted on the rotating object 12 via a headrest insert 111, and the cable 23 is partially inserted into the headrest insert 111.

[0082] Furthermore, the headrest insert 111 includes two vertically extending insert sections 1111, a horizontal section 1112 completely housed within the headrest 11, and a transition section 1113 connecting the horizontal section 1112 and the insert sections 1111. One end of the transition section 1113 connected to the horizontal section 1112 is provided with a notch 1114 for the cable 23 to pass through.

[0083] As shown in Figure 1, when the cable 23 is arranged inside the headrest 11, it connects to the slider 26 and extends a distance in the direction of movement of the slider 26. Then it bends horizontally, extends to the corresponding end of the horizontal segment 1112, crosses the horizontal segment 1112, and bends horizontally again. When it reaches the other end of the horizontal segment 1112, it bends and extends into the notch 1114. It then runs along the corresponding transition segment 1113 and the insertion segment 1111 until it reaches the point of rotation of the rotating object 12 and is fixed therein. This arrangement of the cable inside the headrest avoids localized stress concentration, effectively protects the cable, reduces tension loss, and improves cable performance and durability.

[0084] As shown in Figures 1 and 5 to 7, the headrest 11 includes a core component 113 and a headrest frame 114. The core component 113 is sleeved on the horizontal section 1112 of the headrest insert 11, and is mounted on the headrest frame 114. Elastic elements such as torsion springs are provided on the core component 113 and the horizontal section 1112. These elastic elements apply a spring force to the core component 113, allowing it to rotate relative to the horizontal section 1112. Referring to Figure 22, the elastic elements allow the core component 113 and the headrest frame 114 to rotate and fold downwards together. A locking mechanism is provided within the core component 113, which locks the core component 113, restricting its downward rotation and folding. The linkage unlocking mechanism of this invention is provided on the headrest frame 114, wherein the unlocking handle 21 is connected to the locking mechanism. When the unlocking handle 21 is rotated to the unlock position, the locking mechanism is unlocked. When the locking mechanism releases the restriction on the core component 113, the core component 113 can rotate and fold downward under the action of the elastic element. When the unlocking handle 21 rotates from the unlocked position back to the locked position, the locking mechanism is locked again, thus locking the headrest position.

[0085] The working process of the linkage unlocking mechanism for unlocking the headrest of the present invention will be described below with reference to Figures 18 to 23.

[0086] As shown in Figure 18, when the rotating object 12 is vertically positioned, the headrest 11 is in its set position, providing support for the occupant's head. Referring to Figures 18, 19, 20, and 23, during the process of rotating the object 12 towards the front of the vehicle (or forward), when the object 12 rotates to a certain angle, it pulls the sliding member in the first direction by pulling the cable. The sliding member, along with the unlocking member, moves in the first direction, pushing the unlocking handle 21 to the unlock position, unlocking the headrest 11. Then, under the action of the elastic element 14 (such as a torsion spring), the headrest 11 rotates downwards to a folded state. After the unlocking member moves past the unlocking handle in the first direction, the unlocking handle rotates back from the unlock position to the locked position, locking the headrest and maintaining it in its current state. The headrest 11 is locked during the processes shown in Figures 20, 21, 22, and 23. When the rotating object 12 is being adjusted back to its original position, as shown in Figures 24 and 25, the headrest 11 is always in a locked state. The rotating object 12 can be rotated back to its original position by moving the headrest 11. In the state shown in Figure 25, if it is necessary to return the headrest 11 to the state shown in Figure 18, the headrest can be manually unlocked, and then the headrest 11 can be manually rotated from the folded position to the set position. Then, the unlocking handle 21 will be reset and locked under the action of the first elastic element 13.

[0087] The present invention has been described in detail above with reference to the accompanying drawings and embodiments. Those skilled in the art can make various modifications to the present invention based on the above description. Therefore, certain details in the embodiments should not be construed as limiting the present invention, and the scope of protection of the present invention shall be defined by the appended claims.

Claims

1. A linkage unlocking mechanism for unlocking a headrest, characterized by, include: The unlocking handle (21) is configured to rotate relative to the headrest (11) between a locked position that locks the headrest (11) and an unlocked position that unlocks the headrest (11); The unlocking element (22) is configured to be movable relative to the headrest (11); When the unlocking member (22) moves relative to the headrest (11) in the first direction, it can push the unlocking handle (21) to rotate from the locked position to the unlocked position and pass over the unlocking handle (21) so that the unlocking handle (21) rotates back from the unlocked position to the locked position; When the unlocking member (22) moves back to its original position relative to the headrest (11) in a second direction opposite to the first direction, the unlocking handle (21) remains in the locked position.

2. The linkage unlocking mechanism for unlocking the headrest as described in claim 1, characterized in that, It also includes a stop (261) installed on the headrest, the stop (261) being configured to restrict the rotation of the unlocking member (22) when the unlocking member (22) moves relative to the headrest (11) in the first direction, thereby allowing the unlocking handle (21) to be pushed from the locked position to the unlocked position.

3. The linkage unlocking mechanism for unlocking the headrest as described in claim 1, characterized in that, It also includes a first elastic element (13), one end of which is connected to the unlocking handle (21) and the other end is connected to the headrest (11), for driving the unlocking handle (21) to rotate from the unlocked position back to the locked position.

4. The linkage unlocking mechanism for unlocking the headrest as described in claim 1, characterized in that, It also includes a cable (23), one end of which acts on the unlocking member (22) and the other end is connected to the rotating object (12). As the rotating object (12) rotates in a third direction, the cable (23) is pulled, which in turn pulls the unlocking member (22) to move relative to the headrest (11) in the first direction to unlock the headrest (11).

5. The linkage unlocking mechanism for unlocking the headrest as described in claim 4, characterized in that, The rotating object (12) is the armrest in the middle of the rear seat of the car or the backrest of the car seat, and the headrest (11) is disposed on the rotating object (12).

6. The linkage unlocking mechanism for unlocking the headrest as described in claim 4, characterized in that, The other end of the cable (23) is eccentrically positioned relative to the rotation center of the rotating object (12), so that the cable can be pulled or released during the rotation of the rotating object.

7. The linkage unlocking mechanism for unlocking the headrest as described in claim 4, characterized in that, It also includes a slider (26) slidably mounted on the headrest (11); the unlocking member (22) is rotatably mounted on the slider (26), one end of the cable (23) is connected to the slider (26), and the unlocking member (22) is pulled relative to the headrest (11) in the first direction by pulling the slider (26).

8. The linkage unlocking mechanism for unlocking the headrest as described in claim 7, characterized in that, It also includes a second elastic element (24), one end of which is connected to the unlocking element (22) and the other end is connected to the sliding element (26). The second elastic element (24) generates a restoring force when the unlocking element (22) rotates toward the third direction, thereby applying a restoring force to the unlocking element (22) after the unlocking element (22) is disengaged from the unlocking handle (21) so that the unlocking element (22) rotates and resets in a fourth direction opposite to the third direction.

9. The linkage unlocking mechanism for unlocking the headrest as described in claim 8, characterized in that, The unlocking component (22) includes an unlocking part (221) and a limiting part (222) fixedly connected to the unlocking part (221); When the unlocking member (22) moves relative to the headrest (11) in the first direction, the unlocking part (221) can push the unlocking handle (21) to rotate from the locked position to the unlocked position so that the unlocking member (22) passes over the unlocking handle (21); at the same time, the limiting part (222) contacts the sliding member (26) to restrict the rotation of the unlocking part (221).

10. The linkage unlocking mechanism for unlocking the headrest as described in claim 7, characterized in that, It also includes a third elastic element (25), one end of which is connected to the headrest (11) and the other end is connected to the slider (26). The third elastic element (25) generates a restoring force when the slider (26) is pulled by the cable (23), thereby applying a restoring force to the slider (26) when the cable (23) is relaxed, so that the slider (26) moves in the second direction.

11. The linkage unlocking mechanism for unlocking the headrest as described in claim 10, characterized in that, During the rotation of the rotating object (12) toward the third direction, the restoring force generated by the third elastic element (25) is applied to the sliding element (26) when the cable (23) is relaxed, so that the sliding element (26) moves toward the second direction so that the unlocking element (22) does not cross the unlocking handle (21). Thus, during the rotation of the rotating object (12) toward the fourth direction opposite to the third direction, when the sliding element (26) is pulled by the cable (23) and moves toward the first direction, the unlocking element (22) will not push the unlocking handle (21) to rotate from the locked position to the unlocked position.

12. The linkage unlocking mechanism for unlocking the headrest as described in claim 10, characterized in that, As the rotating object (12) rotates in a fourth direction opposite to the third direction, the restoring force generated by the third elastic element (25) is applied to the slider (26) when the cable (23) is released, so that the slider (26) moves in the second direction and the unlocking element (22) passes over the unlocking handle (21) to return to the initial position.

13. The linkage unlocking mechanism for unlocking the headrest as described in claim 7, characterized in that, The headrest (11) is provided with a groove (112) corresponding to the sliding member (26), and the sliding member (26) is slidably disposed in the groove (112).

14. The linkage unlocking mechanism for unlocking the headrest as described in claim 4, characterized in that, The headrest (11) is mounted on the rotating object (12) via a headrest insert (111), and the cable (23) is partially inserted into the headrest insert (111).

15. The linkage unlocking mechanism for unlocking the headrest as described in claim 9, characterized in that, When the unlocking member (22) moves relative to the headrest (11) in the first direction, the unlocking part (221) can push the unlocking handle (21) to rotate from the locked position to the unlocked position so that the unlocking member (22) passes over the unlocking handle (21); at the same time, the limiting part (222) contacts the blocking part (261) on the sliding member (26) to restrict the rotation of the unlocking part (221), wherein the blocking part (261) and the sliding member (26) are separately formed and connected to each other, or are integrally formed.

16. The linkage unlocking mechanism for unlocking the headrest as described in claim 4, characterized in that, The unlocking component (22) includes an unlocking part (221) and a limiting part (222) fixedly connected to the unlocking part (221); When the unlocking member (22) moves relative to the headrest (11) in the first direction, the unlocking part (221) can push the unlocking handle (21) to rotate from the locked position to the unlocked position so that the unlocking member (22) passes over the unlocking handle (21); at the same time, the limiting part (222) contacts the blocking part (261) fixed on the headrest (11) to restrict the rotation of the unlocking part (221).

17. The linkage unlocking mechanism for unlocking the headrest as described in claim 16, characterized in that, The unlocking part (221) and the limiting part (222) of the unlocking member (22) are respectively provided on the pivot part (223) of the unlocking member (22), and the pivot part (223) is slidably engaged in the groove on the headrest (11).

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