A headrest capable of lifting and tilting

Abstract

This invention relates to the field of automotive headrest technology, disclosing a height-adjustable and tiltable headrest, comprising: a mounting bracket; a headrest body equipped with gears; a transmission mechanism including a first sliding member, a second sliding member, and a clutch, wherein the second sliding member is equipped with a rack, which meshes with the gears and is configured to convert linear motion into gear rotation to drive the headrest body to tilt; the clutch is movably disposed between the first and second sliding members; a driving member provides driving force for the height-adjustment and tilting of the headrest body; when the driving member drives the headrest body to rise or fall, the clutch remains between the first and second sliding members, keeping them linked; the rack and gear remain meshed and move synchronously without relative movement; when the driving member drives the headrest body to tilt, the clutch disengages the first and second sliding members; the rack drives the gears to rotate, causing the headrest body to tilt. The advantages of this invention are that the headrest has good smoothness of movement, a large tilting angle, and a simple structure.

Description

Technical Field

[0001] This invention relates to the field of automotive headrest technology, and more particularly to a headrest that can be raised, lowered, and flipped. Background Technology

[0002] Car seat headrests provide effective head support for passengers, enhancing ride comfort. Adjustable headrests can accommodate passengers of different body types.

[0003] Car seats are becoming increasingly feature-rich, with some equipped with a one-touch bed-like mode. This involves folding down and flattening the backrests of the front seats, aligning them with the rear seat cushions to create a bed-like configuration. To achieve this, the headrests on the front seats typically need to be removed or flipped back to prevent them from interfering with the rear seats or affecting passenger comfort.

[0004] Height-adjustable and tiltable headrests can meet the needs of both scenarios. Existing height-adjustable and tiltable headrests either use two separate motors for each function, resulting in higher costs. Others use a single motor, but these have a smaller tilt angle, poorer smoothness of movement, and require more interior space. Summary of the Invention

[0005] In view of the above-mentioned shortcomings of the existing technology, the technical problem to be solved by the present invention is to provide a headrest that is adjustable and flip-up with good smooth movement, large flip angle and simple structure.

[0006] The technical solution adopted by this invention to solve its technical problem is to propose a height-adjustable and flip-up headrest, comprising: Mounting rack; The headrest body is movably mounted on the mounting bracket and is equipped with gears; The transmission mechanism, movably mounted on the mounting frame, includes a first sliding member, a second sliding member, and a clutch. The first sliding member is slidably mounted on the mounting frame, and the second sliding member is slidably mounted on the first sliding member and is equipped with a rack. The rack meshes with a gear and is configured to convert linear motion into gear rotation to drive the headrest body to rotate. The clutch is movably mounted between the first and second sliding members. The driving component, connected to the second sliding component, provides driving force for the lifting, lowering, and flipping of the headrest body; When the drive unit drives the headrest body to rise and fall, the clutch unit remains between the first sliding member and the second sliding member, so that the two are linked; the rack and the gear remain engaged, and their synchronous displacement does not involve relative movement. When the drive unit drives the headrest body to flip, the clutch unit disengages the first and second sliding members from their linkage; the rack drives the gear to rotate, thereby causing the headrest body to flip.

[0007] Furthermore, the rack is positioned in the same direction as the lifting and lowering motion of the headrest body.

[0008] Furthermore, the headrest body is provided with a pivot, which is slidably mounted on the mounting frame and can rotate relative to the mounting frame; The gear is mounted on the rotating shaft, and the rotating shaft rotates synchronously with the gear.

[0009] Furthermore, the mounting bracket includes a left side plate and a right side plate arranged opposite to each other, and both the left side plate and the right side plate are provided with a first sliding groove; One end of the rotating shaft passes through the first sliding groove on the left side plate and is fixed to the left side of the headrest body; the other end of the rotating shaft passes through the first sliding groove on the right side plate and is fixed to the right side of the headrest body. When the headrest body moves up and down relative to the mounting frame, the two ends of the rotating shaft slide synchronously along the two first sliding grooves; when the headrest body flips relative to the mounting frame, the two ends of the rotating shaft rotate synchronously in the two first sliding grooves.

[0010] Furthermore, both the left and right side plates are provided with a second sliding groove, which includes a connected elongated groove segment and an arc-shaped groove segment; the elongated groove segment is arranged parallel to the first sliding groove. The headrest body is provided with a guide pin, which is slidably disposed in the second slide groove; When the headrest body moves up and down relative to the mounting frame, the guide pin slides along the long groove; when the headrest body flips relative to the mounting frame, the guide pin slides along the arc-shaped groove.

[0011] Furthermore, one end of the first groove near the arc-shaped groove segment is located at the center of the arc of the arc-shaped groove segment; When the headrest body is flipped, the pivot abuts against one end of the first slide groove near the arc-shaped groove section, with this as the center of the flip.

[0012] Furthermore, the mounting frame also includes a top plate and a bottom plate, both of which are connected between the left side plate and the right side plate. The top plate, bottom plate, left side plate, and right side plate are integrally formed and enclose an installation space. The transmission mechanism is slidably and vertically disposed in the installation space; The base plate is provided with a third sliding groove, which includes a straight groove section and an inclined groove section that are connected to each other; the clutch is slidably disposed on the first sliding member, and the clutch has a protrusion that extends into the third sliding groove; When the headrest body moves up and down, the protruding post slides along the straight groove section; when the protruding post slides in the inclined groove section, the clutch disengages from the second sliding member, causing the second sliding member to disengage from the first sliding member.

[0013] Furthermore, the first sliding member is hollow and has an open inner cavity at the top and bottom, and the second sliding member is slidably disposed in the inner cavity; The rotating shaft passes through the first sliding member and can rotate relative to the first sliding member.

[0014] Furthermore, the headrest body is provided with two guide pins symmetrically arranged on the left and right sides. One guide pin is slidably inserted into the second groove on the left side plate, and the other guide pin is slidably inserted into the second groove on the right side plate.

[0015] Furthermore, the driving component is configured as a lead screw motor; The second sliding member is provided with a threaded hole corresponding to the output lead screw of the lead screw motor. The output lead screw of the lead screw motor passes through the threaded hole and forms a lead screw nut mechanism with the second sliding member.

[0016] Compared with the prior art, the present invention has at least the following beneficial effects:

[0017] In this invention, a gear is mounted on the headrest body, and a rack is mounted on the second sliding member of the transmission mechanism. The rack meshes with the gear to convert linear motion into gear rotation. During the headrest body's tilting adjustment, the rack and gear mesh, with the rack driving the gear to rotate, thus causing the headrest body to tilt. This direct drive, rather than compression, ensures smoother movement of the headrest body and reduces friction noise and vibration. During the headrest body's height adjustment, the gear and rack remain meshed, moving synchronously without relative movement, effectively ensuring the stability of the headrest body's height adjustment. The headrest's height and tilting adjustments are achieved through a single drive component, resulting in low cost and simple control. Its overall structure is simple and compact, allowing for large-angle tilting of the headrest body while requiring less X-axis space within the vehicle. Furthermore, the compact headrest structure reduces headrest width, improving the rear passenger's field of vision.

[0018] In this invention, a rotating shaft is provided on the headrest body. The two ends of the rotating shaft are slidably and rotatably disposed in the first sliding grooves of the left and right side plates of the mounting frame, respectively, to ensure the synchronicity of the movement of both sides when the headrest body is raised and lowered and flipped, and to further ensure the smoothness of the movement of the headrest body.

[0019] In this invention, two guide pins are symmetrically arranged on the headrest body. These two guide pins slide in engagement with second sliding grooves on the left and right side plates, respectively. When the headrest body rotates relative to the mounting frame, the guide pins slide along the arc-shaped section of the second sliding groove, ensuring reliable rotation of the headrest body. Furthermore, one end of the first sliding groove is located at the center of the arc-shaped section of the second sliding groove. When the headrest body rotates, the rotating shaft abuts against this end of the first sliding groove, using this as the rotation center to ensure that the rotation center of the headrest remains unchanged. This results in good structural stability and prevents jamming or jamming.

[0020] In this invention, the first slide groove, the second slide groove, and the third slide groove are all centrally located on the mounting frame, ensuring a simple structure, high strength, and small cumulative error. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the height-adjustable and flip-up headrest of the present invention; Figure 2 for Figure 1 A structural diagram from another perspective; Figure 3 for Figure 1 Floor plan; Figure 4 for Figure 1 Exploded view; Figure 5 for Figure 4 A structural diagram from another perspective; Figure 6 for Figure 3 A schematic diagram showing the headrest body raised to its highest point and flipped for adjustment. Figure 7 for Figure 6 The left view; Figure 8 This is a schematic diagram of the structure after removing the mounting bracket, the first sliding component, and the clutch component. Figure 9 This is a structural diagram of the mounting bracket.

[0022] In the picture: 1. Mounting bracket; 10. Base plate; 100. Installation space; 101. Third slide rail; 101A. Straight slide rail section; 101B. Inclined slide rail section; 11. Left side plate; 110. First slide rail; 12. Right side plate; 120. Second slide rail; 120A. Long slide rail section; 120B. Arc-shaped slide rail section; 13. Top plate; 2. Headrest body; 20. Gear; 21. Rotating shaft; 22. Guide pin; 3. Transmission mechanism; 31. First sliding member; 310. Inner cavity; 32. Second sliding member; 320. Rack; 321. Threaded hole; 33. Clutch; 330. Protruding post; 4. Drive components. Detailed Implementation

[0023] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0024] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly.

[0025] Furthermore, in this invention, descriptions involving terms such as "first," "second," and "a" are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0026] In this invention, unless otherwise explicitly specified and limited, the terms "connection," "fixed," etc., should be interpreted broadly. For example, "fixed" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0027] Furthermore, the technical solutions of the various embodiments of the present invention can be combined with each other, but only if they are feasible for those skilled in the art. If the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by the present invention.

[0028] like Figures 1-9As shown, the headrest in this embodiment is height-adjustable and flip-up. It can be height-adjusted to suit passengers of different heights and body types, and can also be flipped up. When the bed is formed with one click, the headrest can be flipped up to ensure that it does not interfere with the seat cushion of the rear car seat, thus ensuring that the backrest can be flush with the seat cushion of the rear car seat. It does not require the headrest to be pulled out, and the operation is simple. Moreover, the height-adjustment and flip-up functions of the headrest can be realized through a single drive component 4, which is low in cost and simple to control.

[0029] Specifically, the height-adjustable and flip-up headrest of this embodiment mainly includes: Mounting bracket 1, as a supporting component of the entire structure, needs to have sufficient strength, and its specific structure will be described in detail later. The headrest body 2 is movably mounted on the mounting frame 1 and is equipped with a gear 20; the rotation of the gear 20 drives the headrest body 2 to rotate relative to the mounting frame 1, thereby realizing the rotation adjustment of the headrest. The transmission mechanism 3 is movably mounted on the mounting frame 1 and includes a first sliding member 31, a second sliding member 32, and a clutch member 33. The first sliding member 31 is slidably mounted on the mounting frame 1, and the second sliding member 32 is slidably mounted on the first sliding member 31. The second sliding member 32 is equipped with a rack 320, which can be integrated with the rack or separated from it, but is fixedly connected. The rack 320 meshes with the gear 20 and is configured to convert linear motion into gear 20 rotation to drive the headrest body 2 to flip. The clutch member 33 is movably mounted between the first sliding member 31 and the second sliding member 32. When the clutch member 33 is in the "engaged" state, the second sliding member 32 and the first sliding member 31 are coupled together and move up and down in coordination. When the clutch member 33 is in the "disengaged" state, the second sliding member 32 is disengaged from the first sliding member 31 and can slide relative to the first sliding member 31. The driving component 4 is connected to the second sliding component 32 and provides driving force for the lifting and flipping of the headrest body 2. In this embodiment, the lifting and flipping of the headrest are both driven by the driving component 4, which ensures low cost and simple control. In actual use, when the driving component 4 drives the headrest body 2 to rise and fall, the clutch component 33 remains between the first sliding component 31 and the second sliding component 32, so that the two are linked, that is, the first sliding component 31 and the second sliding component 32 move up and down together, and there is no relative movement between the first sliding component 31 and the second sliding component 32; the rack 320 is engaged with the gear 20, and the synchronous displacement does not move relative to each other, that is, the rack 320 and the gear 20 remain relatively stationary at this time, so the gear 20 will not rotate, and the headrest body 2 will not flip. In actual use, when the driving component 4 drives the headrest body 2 to flip, the clutch component 33 disengages the first sliding component 31 and the second sliding component 32 from each other. Specifically, the clutch component 33 retracts from the second sliding component 32 and is no longer connected to the second sliding component 32, so that the second sliding component 32 can slide relative to the first sliding component 31; the rack 320 drives the gear 20 to rotate, so that the headrest body 2 flips.

[0030] In this embodiment, a gear 20 is arranged on the headrest body 2, and a rack 320 is arranged on the second sliding member 32 of the transmission mechanism 3. The rack 320 meshes with the gear 20 to convert linear motion into rotation of the gear 20. During the tilting adjustment of the headrest body 2, the rack 320 and the gear 20 mesh, and the rack 320 drives the gear 20 to rotate, thereby causing the headrest body 2 to tilt. The headrest body 2 is tilted by direct drive rather than compression, which ensures better smoothness of movement of the headrest body 2 and makes it less prone to friction noise and vibration.

[0031] Furthermore, during the height adjustment of the headrest body 2, the gear 20 and rack 320 remain meshed, moving synchronously up and down without relative movement, effectively ensuring the stability of the headrest body 2's height adjustment. The headrest's height and tilt adjustment are achieved through only one drive component 4, resulting in low cost and simple control. Its overall structure is simple and compact, allowing the headrest body 2 to tilt at large angles with low requirements for X-axis space within the vehicle. Simultaneously, the compact headrest structure reduces the headrest width, improving the rear passenger's field of vision.

[0032] The rack 320 is positioned in the same direction as the headrest body 2, which prevents the headrest body 2 from exerting force on the rack 320 during the lifting and lowering process, thus ensuring smooth lifting and lowering of the headrest body 2.

[0033] In this embodiment, the driving component 4 is configured as a lead screw motor, and the second sliding component 32 is provided with a threaded hole 321 corresponding to the output lead screw of the lead screw motor. The output lead screw of the lead screw motor passes through the threaded hole 321 and forms a lead screw nut mechanism with the second sliding component 32.

[0034] During use, the lead screw motor drives its output lead screw to rotate, and the output lead screw drives the second sliding member 32, which meshes with it, to extend and retract along the output lead screw. In turn, the extension and retraction of the second sliding member 32 drives the headrest body 2 to move.

[0035] Understandably, since the function of the driving component 4 in this embodiment can be regarded as driving the second sliding component 32 to extend and retract, the driving component 4 is preferably, but not limited to, a lead screw motor. For example, it can also be implemented by a gas spring, telescopic cylinder, or other driving components.

[0036] like Figures 8-9 and combined Figures 4-5 As shown, in this embodiment, the headrest body 2 is provided with a rotating shaft 21. The rotating shaft 21 can be regarded as part of the headrest body 2. The headrest body 2 moves accordingly. The rotating shaft 21 is slidably arranged on the mounting frame 1 to ensure that the headrest body 2 can move up and down. The rotating shaft 21 can rotate relative to the mounting frame 1 to ensure that the headrest body 2 can flip.

[0037] The gear 20 is sleeved on the rotating shaft 21, and the rotating shaft 21 rotates synchronously with the gear 20. That is, torque can be transmitted between the gear 20 and the rotating shaft 21. It can be regarded as the gear 20 being fixedly connected to the rotating shaft 21. For example, the gear 20 can be detachably fixedly installed on the rotating shaft 21 by means of a flat key or spline.

[0038] The mounting bracket 1 includes a left side plate 11 and a right side plate 12 arranged opposite to each other. Both the left side plate 11 and the right side plate 12 are provided with a first sliding groove 110. The first sliding grooves 110 on both the left side plate 11 and the right side plate 12 have the same structure. The first sliding grooves 110 are oriented in the same direction as the lifting and lowering movement of the headrest body 2, and are elongated grooves. One end (i.e., the left end) of the rotating shaft 21 passes through the first sliding groove 110 on the left side plate 11 and is fixed to the left side of the headrest body 2; the other end (i.e., the right end) of the rotating shaft 21 passes through the first sliding groove 110 on the right side plate 12 and is fixed to the right side of the headrest body 2.

[0039] In actual use, when the headrest body 2 moves up and down relative to the mounting frame 1, both ends of the rotating shaft 21 slide synchronously along the two first slide grooves 110. The first slide grooves 110 can stably guide the up and down movement of the rotating shaft 21, ensuring the stability of the headrest body 2 during adjustment and preventing deflection or shaking. When the headrest body 2 flips relative to the mounting frame 1, both ends of the rotating shaft 21 rotate synchronously in the two first slide grooves 110. The first slide grooves 110 do not restrict the rotation of the rotating shaft 21, ensuring the smooth flipping of the headrest body 2.

[0040] In this embodiment, a rotating shaft 21 is provided on the headrest body 2. The two ends of the rotating shaft 21 are slidably and rotatably disposed in the first slide grooves 110 of the left side plate 11 and the right side plate 12 on the mounting frame 1, respectively, to ensure the synchronicity of the movement of the two sides when the headrest body 2 is raised and lowered and flipped, and to further ensure the smoothness of the movement of the headrest body 2.

[0041] The first groove 110 and the rotating shaft 21 cannot accurately guide the flipping motion of the headrest body 2.

[0042] Therefore, both the left side plate 11 and the right side plate 12 are provided with a second sliding groove 120. The second sliding groove 120 includes a connected elongated groove segment 120A and an arc-shaped groove segment 120B. The elongated groove segment 120A is arranged parallel to the first sliding groove 110, that is, the setting direction of the elongated groove segment 120A is also consistent with the lifting and lowering direction of the headrest body 2. The headrest body 2 is provided with a guide pin 22, which is slidably disposed in the second sliding groove 120.

[0043] In actual use, when the headrest body 2 moves up and down relative to the mounting frame 1, the guide pin 22 slides along the long groove 120A of the second slide groove 120; when the headrest body 2 flips relative to the mounting frame 1, the guide pin 22 slides along the arc-shaped groove 120B. The cooperation between the arc-shaped groove 120B and the guide pin 22 provides precise guidance for the flipping of the headrest body 2, ensuring that the flipping of the headrest body 2 is reliable.

[0044] Wherein, the end of the first slide groove 110 near the arc-shaped groove segment 120B is located at the center of the arc of the arc-shaped groove segment 120B; when the headrest body 2 flips, the rotating shaft 21 abuts against the end of the first slide groove 110 near the arc-shaped groove segment 120B, using this as the center of rotation. That is, when the headrest body 2 flips, the rotating shaft 21 abuts against this end of the first slide groove 110, using this as the center of rotation, ensuring that the center of rotation of the headrest remains unchanged, resulting in good structural stability and preventing jamming or jamming.

[0045] Furthermore, two guide pins 22 are symmetrically arranged on the left and right sides of the headrest body 2. One guide pin 22 is slidably inserted into the second slide groove 120 on the left side plate 11, and the other guide pin 22 is slidably inserted into the second slide groove 120 on the right side plate 12. The two guide pins 22 cooperate with the second slide grooves 120 on both the left and right side plates 11 and 12 to ensure the synchronicity of the left and right side flipping movements of the headrest body 2 and ensure smooth flipping action.

[0046] Furthermore, the mounting frame 1 in this embodiment also includes a top plate 13 and a bottom plate 10. The top plate 13 and the bottom plate 10 are both connected between the left side plate 11 and the right side plate 12. The top plate 13, the bottom plate 10, the left side plate 11 and the right side plate 12 are integrally arranged and form an installation space 100. The transmission mechanism 3 is slidably and vertically arranged in the installation space 100. Regardless of the lifting or flipping movement of the headrest body 2, the transmission mechanism 3 moves vertically and vertically within the installation space 100 of the mounting frame 1, thus avoiding external interference to the movement of the transmission mechanism 3.

[0047] The base plate 10 of the mounting bracket 1 is provided with a third sliding groove 101, which includes a straight groove section 101A and an inclined groove section 101B that are connected to each other. In this embodiment, the first sliding groove 110, the second sliding groove 120, and the third sliding groove 101 are all centrally located on the mounting bracket 1, ensuring a simple structure, high strength, and small cumulative error. This improves the overall structural compactness and eliminates the need to place them on different components.

[0048] The clutch 33 is slidably mounted on the first sliding member 31, and the clutch 33 has a protrusion 330 that extends into the third sliding groove 101. The direction of the third sliding groove 101 is consistent with the direction of the lifting and lowering movement of the headrest body 2.

[0049] In actual use, when the headrest body 2 moves up and down, the protruding post 330 slides along the straight groove section 101A of the third sliding groove 101, and the clutch 33 will not disengage from the first sliding member 31 and the second sliding member 32, that is, the clutch 33 is in the "engaged" state, and the first sliding member 31 and the second sliding member 32 maintain synchronous up and down displacement. When the protruding post 330 is forced to slide on the inclined groove section 101B, the clutch 33 disengages from the second sliding member 32, causing the second sliding member 32 to disengage from the first sliding member 31.

[0050] Specifically, the second sliding member 32 is provided with a locking groove that matches the clutch member 33. The clutch member 33 locks into the locking groove, i.e., it is in the "engaged" state. When the inclined groove section 101B forces the clutch member 33 to disengage from the locking groove on the second sliding member 32, i.e., the clutch member 33 is in the "disengaged" state, the second sliding member 32 can slide relative to the first sliding member 31, which also ensures that the rack 320 can smoothly drive the gear 20 to rotate. Understandably, a spring (illustrated in the figure) can also be provided on the clutch member 33. The elastic force of the spring makes the clutch member 33 tend to lock into the locking groove of the second sliding member 32, which will not be elaborated here.

[0051] In this embodiment, the first sliding member 31 is hollow and has an open inner cavity 310. The second sliding member 32 is slidably disposed in the inner cavity 310, that is, the first sliding member 31 is an outer slider and the second sliding member 32 is an inner slider, and the two sliders are nested and slidably engaged. The rotating shaft 21 passes through the first sliding member 31 and can rotate relative to the first sliding member 31.

[0052] The working principle of the height-adjustable and flip-up headrest in this embodiment is as follows: In the initial state, the lifting mechanism and the headrest body 2 are both at the lower limit position relative to the mounting bracket 1. At this time, the rotating shaft 21 is at the lower end of the first slide groove 110, the guide pin 22 is at the lower end of the long groove section 120A of the second slide groove 120, and the clutch 33 is held between the first sliding member 31 and the second sliding member 32 to ensure that the two are linked. The protrusion 330 on the clutch 33 is at the lower end of the straight groove section 101A of the third slide groove 101.

[0053] When it is necessary to raise the height of the headrest body 2, the lead screw motor drives its output lead screw to rotate, causing the second sliding member 32 to slide upward. The first sliding member 31 and the headrest body 2 also slide upward with the second sliding member 32, realizing the height adjustment of the headrest body 2. During this process, the rotating shaft 21 slides along the first sliding groove 110 to its upper end, the guide pin 22 slides along the long groove section 120A of the second sliding groove 120 to its upper end, and the protruding post 330 slides along the straight groove section 101A of the third sliding groove 101 to its upper end.

[0054] When the headrest body 2 needs to be flipped and adjusted, the headrest body 2 is adjusted upward to the upper limit position. As the protrusion 330 slides into the inclined groove section 101B of the third slide groove 101, the clutch 33 disengages from the second sliding member 32, and the first sliding member 31 and the second sliding member 32 can move relative to each other. The rotating shaft 21 also reaches the upper end of the first slide groove 110, and the guide pin 22 reaches the arc-shaped groove section 120B of the second slide groove 120. The screw motor continues to drive the second sliding member 32 to slide upward, and the first sliding member 31 no longer slides upward. The rack 320 on the second sliding member 32 drives the gear 20 to rotate, thereby causing the headrest body 2 to flip. At this time, the guide pin 22 moves along one end of the arc-shaped groove section 120B to the other end until the headrest body 2 is flipped. The headrest body 2 can achieve a flip of more than 150 degrees.

[0055] In this design, the headrest is height-adjustable and flip-up, offering smooth movement, a large flip angle, and a simple structure.

Claims

1. A height-adjustable and flip-up headrest, characterized in that, include: Mounting bracket (1); The headrest body (2) is movably mounted on the mounting bracket (1) and is equipped with gears (20); The transmission mechanism (3) is movably mounted on the mounting frame (1) and includes a first sliding member (31), a second sliding member (32), and a clutch member (33). The first sliding member (31) is slidably mounted on the mounting frame (1), and the second sliding member (32) is slidably mounted on the first sliding member (31). The second sliding member (32) is equipped with a rack (320), which meshes with the gear (20) and is configured to convert linear motion into gear (20) rotation to drive the headrest body (2) to flip. The clutch member (33) is movably mounted between the first sliding member (31) and the second sliding member (32). The driving component (4) is connected to the second sliding component (32) to provide driving force for the lifting and flipping of the headrest body (2); When the drive member (4) drives the headrest body (2) to rise and fall, the clutch member (33) remains between the first sliding member (31) and the second sliding member (32), so that the two are linked; the rack (320) and the gear (20) remain engaged, and the synchronous displacement does not move relative to each other; When the drive member (4) drives the headrest body (2) to flip, the clutch member (33) disengages the first sliding member (31) and the second sliding member (32) from their linkage; the rack (320) drives the gear (20) to rotate so that the headrest body (2) flips.

2. The height-adjustable and flip-up headrest according to claim 1, characterized in that, The rack (320) is positioned in the same direction as the lifting and lowering motion of the headrest body (2).

3. The height-adjustable and flip-up headrest according to claim 1, characterized in that, The headrest body (2) is provided with a rotating shaft (21), which is slidably mounted on the mounting frame (1) and can rotate relative to the mounting frame (1); The gear (20) is sleeved on the rotating shaft (21), and the rotating shaft (21) rotates synchronously with the gear (20).

4. The height-adjustable and flip-up headrest according to claim 3, characterized in that, The mounting bracket (1) includes a left side plate (11) and a right side plate (12) arranged opposite to each other, and both the left side plate (11) and the right side plate (12) are provided with a first sliding groove (110); One end of the pivot (21) passes through the first groove (110) on the left side plate (11) and is fixed on the left side of the headrest body (2); the other end of the pivot (21) passes through the first groove (110) on the right side plate (12) and is fixed on the right side of the headrest body (2). When the headrest body (2) moves up and down relative to the mounting frame (1), the two ends of the rotating shaft (21) slide synchronously along the two first slide grooves (110); when the headrest body (2) flips relative to the mounting frame (1), the two ends of the rotating shaft (21) rotate synchronously in the two first slide grooves (110).

5. The height-adjustable and flip-up headrest according to claim 4, characterized in that, The left side plate (11) and the right side plate (12) are each provided with a second sliding groove (120). The second sliding groove (120) includes a connected elongated groove segment (120A) and an arc-shaped groove segment (120B). The elongated groove segment (120A) is arranged parallel to the first sliding groove (110). The headrest body (2) is provided with a guide pin (22), which is slidably disposed in the second slide groove (120); When the headrest body (2) moves up and down relative to the mounting frame (1), the guide pin (22) slides along the long groove section (120A); when the headrest body (2) flips relative to the mounting frame (1), the guide pin (22) slides along the arc-shaped groove section (120B).

6. The height-adjustable and flip-up headrest according to claim 5, characterized in that, The first groove (110) is located at the center of the arc of the arc-shaped groove segment (120B) at one end near the arc-shaped groove segment (120B); When the headrest body (2) is flipped, the rotating shaft (21) abuts against one end of the first slide groove (110) near the arc-shaped groove section (120B), with this as the center of the flip.

7. The height-adjustable and flip-up headrest according to claim 4 or 5, characterized in that, The mounting bracket (1) also includes a top plate (13) and a bottom plate (10). The top plate (13) and the bottom plate (10) are both connected between the left side plate (11) and the right side plate (12). The top plate (13), the bottom plate (10), the left side plate (11) and the right side plate (12) are integrated and form an installation space (100). The transmission mechanism (3) is slidably and vertically disposed in the installation space (100); The base plate (10) is provided with a third sliding groove (101), which includes a straight groove section (101A) and an inclined groove section (101B) that are connected to each other; the clutch (33) is slidably disposed on the first sliding member (31), and the clutch (33) has a protrusion (330) that extends into the third sliding groove (101); When the headrest body (2) moves up and down, the protruding post (330) slides along the straight groove section (101A); when the protruding post (330) slides on the inclined groove section (101B), the clutch (33) disengages from the second sliding member (32), so that the second sliding member (32) is disengaged from the first sliding member (31).

8. The height-adjustable and flip-up headrest according to claim 3, characterized in that, The first sliding member (31) is hollow and has an open inner cavity (310) at the top and bottom. The second sliding member (32) is slidably disposed in the inner cavity (310). The rotating shaft (21) passes through the first sliding member (31) and can rotate relative to the first sliding member (31).

9. The height-adjustable and flip-up headrest according to claim 5, characterized in that, The headrest body (2) is provided with two guide pins (22) symmetrically arranged on the left and right sides. One guide pin (22) is slidably inserted into the second slide groove (120) on the left side plate (11), and the other guide pin (22) is slidably inserted into the second slide groove (120) on the right side plate (12).

10. The height-adjustable and flip-up headrest according to claim 1, characterized in that, The driving component (4) is configured as a lead screw motor; The second sliding member (32) is provided with a threaded hole (321) corresponding to the output lead screw of the lead screw motor. The output lead screw of the lead screw motor passes through the threaded hole (321) and forms a lead screw nut mechanism with the second sliding member (32).

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