Headrest lifting device and seat

Abstract

This utility model discloses a headrest lifting device. A groove is provided on the backrest; a headrest bracket is slidably installed within the groove; a guide structure includes multiple teeth mounted on the inner wall of one side of the groove, each tooth having a supporting surface and a guiding surface; an adjusting block is rotatably mounted on the headrest bracket and has an abutting portion. When the adjusting block is in the extended position, the abutting portion abuts against the guide surface under the action of an elastic element, or the abutting portion presses downward against the supporting surface; when the adjusting block is in the compressed position, the abutting portion separates from the guide structure. The groove contains an upper reset member and a lower reset member. The upper reset member can push the adjusting block to the compressed position; the lower reset member can push the adjusting block to the extended position. Therefore, when adjusting the headrest height, it is only necessary to pull the headrest or headrest bracket to the appropriate height, making operation simple and convenient for users. Furthermore, this utility model also discloses a seat equipped with the above-mentioned headrest lifting device.

Description

Technical Field

[0001] This utility model relates to the field of seating technology, and in particular to a headrest lifting device and a seat. Background Technology

[0002] A headrest is a component installed at the upper part of a seat back to support the head and relieve neck pressure. Existing headrests are usually fixed to the seat and cannot be height-adjusted, failing to meet the needs of different users, resulting in poor usability and significantly reducing seat comfort. Some existing technologies incorporate a lifting mechanism between the headrest and the seat to adjust the headrest height. These mechanisms typically employ screw and nut mechanisms, rack and pinion mechanisms, or worm gear mechanisms. While these structures achieve headrest height adjustment, they are relatively complex and cumbersome to install. Furthermore, the lifting mechanism usually includes an adjustment knob, requiring multiple rotations to reach the desired height, making operation inconvenient for users. Utility Model Content

[0003] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes a headrest lifting device, which has a simple structure, is easy to operate, and is convenient for users.

[0004] A headrest lifting device according to an embodiment of the present invention includes: a backrest having a slide groove arranged in a vertical direction; a headrest bracket slidably installed in the slide groove and movable along the slide groove; a guide structure including a plurality of teeth installed in a vertical direction on the inner wall of one side of the slide groove, each tooth having a support surface and a guide surface, the guide surface being connected to the support surface and extending from top to bottom in a direction away from the slide groove; and an adjustment assembly including an adjustment block and an elastic element, the adjustment block being rotatably installed on the headrest bracket and having an abutment portion extending toward the guide structure, the elastic element being installed between the adjustment block and the headrest bracket, the adjustment block having a compressed position and an extended position, wherein the adjustment block is in the extended position. The abutting part can abut against the guide surface and move upward along the guide surface under the action of the elastic member, or the abutting part can press downward against the support surface. When the adjusting block is in the compressed position, the abutting part can compress the elastic member and separate from the guide structure. The slide groove is provided with an upper reset member and a lower reset member, which are respectively provided on the upper and lower sides of the guide structure. The upper reset member can push the adjusting block to rotate downward from the unfolded position to the compressed position, and make the headrest bracket move downward along the slide groove. The lower reset member can abut against the adjusting block and push the adjusting block to rotate upward from the compressed position to the unfolded position.

[0005] The headrest lifting device according to the embodiment of this utility model has at least the following beneficial effects:

[0006] By employing the headrest lifting device of this utility model embodiment, when it is necessary to adjust the headrest height, the headrest or headrest bracket can be pulled upwards directly. During this process, the adjusting block is in the unfolded position, and the abutting part of the adjusting block can move upwards along the guide surface of each tooth in the guide structure under the action of the elastic member. When the appropriate height is adjusted, the headrest or headrest bracket can be released directly. At this time, the abutting part of the adjusting block is located above the tooth at the corresponding height and can press downwards against the support surface of the tooth. That is, the support surface can support the abutting part to prevent the adjusting block from moving downwards, thereby maintaining the headrest and headrest bracket at that height. When the headrest bracket is pulled upwards, the abutting part of the adjusting block abuts against the upper reset member. The upper reset member pushes the abutting block to rotate and compresses the spring, causing the adjusting block to rotate downwards from the unfolded position to the compressed position. At this time, the adjusting block separates from the teeth of the guide structure, allowing the headrest bracket to move downwards and reset. When the adjusting block moves downwards to abut against the lower reset member, the lower reset member pushes the abutting block upwards to rotate and causes the elastic element to return to its original deformation, thus switching the adjusting block from the compressed position to the unfolded position. Therefore, the headrest bracket can be pulled upwards to adjust the headrest height. As can be seen, the headrest adjustment structure of this embodiment can achieve headrest height adjustment simply by using the guide structure and the adjusting block. Furthermore, adjustment can be performed by directly pulling the headrest or headrest bracket, making it very convenient and user-friendly.

[0007] According to some embodiments of this utility model, one of the adjusting block and the headrest bracket is equipped with a rotating shaft, and the other has a strip-shaped groove arranged in the vertical direction and adapted to the rotating shaft. The rotating shaft is movably inserted into the strip-shaped groove, and the adjusting block can rotate around the rotating shaft and move along the strip-shaped groove. One of the adjusting block and the headrest bracket is provided with a positioning post, and the other has a positioning groove. The positioning groove includes a transverse groove and a longitudinal groove that are interconnected. When the positioning post is embedded in the transverse groove, the adjusting block is in the unfolded position, and the upper reset member can press against the abutment part and push the adjusting block to rotate downward to compress the elastic member. The positioning post can move along the transverse groove and be embedded in the longitudinal groove under the elastic action of the elastic member. When the positioning post is embedded in the longitudinal groove, the adjusting block is in the compressed position, and the lower reset member can press against the abutment part and push the adjusting block to rotate upward. The positioning post can move along the longitudinal groove and be embedded in the transverse groove under the elastic action of the elastic member.

[0008] According to some embodiments of this utility model, the positioning groove is formed in the headrest bracket, the longitudinal groove is located at the end of the transverse groove away from the guide structure and extends downward, the positioning post is installed on the adjusting block and embedded in the positioning groove, when the positioning post is embedded in the transverse groove, the adjusting block is in the unfolded position, the upper reset member can press against the abutment part and drive the positioning post to move along the transverse groove, when the positioning post moves to the end of the transverse groove away from the guide structure, the positioning post can be embedded downward into the longitudinal groove under the elastic action of the elastic member, and drive the adjusting block to move to the compressed position; when the positioning post is embedded in the longitudinal groove, the lower reset member can press upward against the positioning post and push the positioning post to move upward along the longitudinal groove, when the positioning post moves to the upper end of the longitudinal groove, the positioning post can be embedded in the transverse groove under the elastic action of the elastic member and drive the adjusting block to move to the unfolded position.

[0009] According to some embodiments of this utility model, the lower reset member is disposed in the sliding groove and is aligned with the longitudinal groove in the vertical direction; when the positioning post passes through the longitudinal groove, the positioning post part protrudes outside the longitudinal groove and can abut against the lower reset member; or a guide groove is provided on one side wall of the headrest bracket, which is arranged in the vertical direction and communicates with the lower end of the longitudinal groove, and the lower reset member is movably embedded in the guide groove and can move upward relative to the guide groove into the longitudinal groove.

[0010] According to some embodiments of the present invention, the headrest bracket has an opening facing the guide structure in a mounting groove, and the adjusting block is embedded in the mounting groove; when the adjusting block is in the unfolded position, the abutting part passes through the opening and extends to the outside of the mounting groove, and the abutting part can move into the inside of the mounting groove to the compressed position under the pressing action of the upper reset member.

[0011] According to some embodiments of this utility model, the elastic element is a compression spring, the end of the adjusting block away from the guide structure is provided with a limiting post, the inner wall of the mounting groove facing the opening is provided with a limiting groove, one end of the elastic element is sleeved on the outer periphery of the limiting post and abuts against the adjusting block, and the other end of the elastic element is embedded in the limiting groove and abuts against the inner wall of the limiting groove.

[0012] According to some embodiments of the present invention, a groove is formed on one side wall of the slide groove, and the guide structure is arranged in the groove along the vertical direction. In each tooth, the guide surface is connected to the inner wall of the groove and extends from bottom to top along the direction close to the slide groove. The support surface is connected between the upper end of the guide surface and the inner wall of the groove. The support surface is arranged in the horizontal direction, or the support surface extends from top to bottom along the direction away from the slide groove. The upper end of the guide surface is located in the groove. The upper reset member is the upper periphery of the groove, or the upper reset member is provided on one side wall of the slide groove close to the groove and located above the groove.

[0013] According to some embodiments of the present invention, the abutting portion has a guide portion extending from top to bottom toward the guide structure, the guide portion being able to abut against any of the guide surfaces and move upward along the guide surface.

[0014] According to some embodiments of this utility model, the sliding groove is formed on the front surface of the backrest, and a cover plate is installed on the front surface of the backrest to cover the sliding groove. The upper end of the backrest is provided with an insertion port communicating with the sliding groove, and the headrest bracket is movably installed in the sliding groove through the insertion port. A slot is formed at the lower end of the headrest bracket, and an elastic locking block protruding forward relative to the headrest bracket is provided in the slot. The cover plate is provided with a relief groove corresponding to the elastic locking block. The elastic locking block passes through the relief groove and can move up and down along the relief groove. When the elastic locking block moves to the upper end of the relief groove, the elastic locking block can abut against the upper inner wall of the relief groove; or the elastic locking block can be pressed into the slot, so that the headrest bracket can drive the elastic locking block to continue moving upward to the outside of the sliding groove.

[0015] The seat according to an embodiment of the present invention is provided with a headrest lifting device according to any of the above embodiments.

[0016] The seat according to the embodiment of this utility model has at least the following beneficial effects:

[0017] By setting up the headrest lifting device in any of the above embodiments, adjusting the headrest height simply requires pulling the headrest or headrest bracket to the appropriate height. This operation is simple and convenient, making it easy for users to use and improving the user experience.

[0018] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0019] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0020] Figure 1 This is a front view of the headrest lifting device according to an embodiment of the present utility model;

[0021] Figure 2 This is a rear view of the headrest lifting device according to an embodiment of the present utility model;

[0022] Figure 3 This is a front cross-sectional view of the adjusting block and the upper reset member abutting at the compression position according to an embodiment of the present invention;

[0023] Figure 4 This is a schematic diagram of the rear cross-section of the adjusting block and the upper reset member abutting at the compression position according to an embodiment of the present invention;

[0024] Figure 5 This is a front cross-sectional view of the adjusting block and the lower reset member abutting in the unfolded position according to an embodiment of the present invention;

[0025] Figure 6 This is a schematic diagram of the rear cross section of the adjusting block and the lower reset member abutting in the unfolded position according to an embodiment of the present invention.

[0026] Figure 7 This is a schematic diagram of the adjusting block according to an embodiment of the present utility model;

[0027] Figure 8 This is a schematic diagram of the adjusting block in the compressed position in the headrest support according to an embodiment of the present invention;

[0028] Figure 9 This is a schematic diagram of the headrest support in the unfolded position according to an embodiment of the present invention;

[0029] Figure 10 This is a cross-sectional schematic diagram of the backrest according to an embodiment of the present utility model;

[0030] Figure 11 This is a cross-sectional schematic diagram of the backrest according to an embodiment of the present utility model.

[0031] Figure label:

[0032] Backrest 100, slide 110, groove 111, inlet 112, tooth 120, guide surface 121, support surface 122, upper reset part 130, lower reset part 140, cover plate 150, clearance groove 151;

[0033] Headrest bracket 200, adjusting block 210, abutting part 211, strip groove 212, limiting post 213, guide part 214, elastic element 220, rotating shaft 230, positioning post 240, transverse groove 241, longitudinal groove 242, guide groove 250, mounting groove 260, limiting groove 261, slot 270, elastic locking block 271. Detailed Implementation

[0034] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0035] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0036] In the description of this utility model, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. If "first" or "second" is used in the description, it is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0037] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0038] Reference Figures 1 to 11This utility model provides a headrest lifting device, including a backrest 100, a headrest bracket 200, a guide structure, and an adjustment assembly. The backrest 100 has a vertically arranged groove 110; the headrest bracket 200 is used to mount a headrest, and is slidably mounted within the groove 110 and movable along the groove 110; the guide structure includes multiple teeth 120 mounted vertically on one side of the inner wall of the groove 110, each tooth 120 having a support surface 122 and a guide surface 121, the guide surface 121 being connected to the support surface 122 and extending downwards away from the groove 110; the adjustment assembly includes an adjustment block 210 and an elastic element 220, the adjustment block 210 being rotatably mounted on the headrest bracket 200 and having an abutment portion 211 extending toward the guide structure, the elastic element 220 being installed between the adjustment block 210 and the headrest bracket 200, the adjustment block 210 having a compressed position and an extended position, when the adjustment block 210... In the unfolded position, the abutment part 211 can abut against the guide surface 121 and move upward along the guide surface 121 under the action of the elastic member 220, or the abutment part 211 can press downward against the support surface 122. When the adjusting block 210 is in the compressed position, the abutment part 211 can compress the elastic member 220 and separate from the guide structure. The slide groove 110 is provided with an upper reset member 130 and a lower reset member 140, which are respectively provided on the upper and lower sides of the guide structure. The upper reset member 130 can push the adjusting block 210 to rotate downward from the unfolded position to the compressed position, and make the headrest bracket 200 move downward along the slide groove 110. The lower reset member 140 can abut against the adjusting block 210 and push the adjusting block 210 to rotate upward from the compressed position to the unfolded position.

[0039] By employing the headrest lifting device of this utility model embodiment, when it is necessary to adjust the headrest height, the headrest or headrest support 200 can be pulled upwards directly. During this process, the adjusting block 210 is in the unfolded position, and the abutting part 211 of the adjusting block 210 can move upwards along the guide surface 121 of each tooth 120 in the guide structure under the action of the elastic member 220. When the appropriate height is adjusted, the headrest or headrest support 200 is released directly. At this time, the abutting part 211 of the adjusting block 210 is located above the tooth 120 at the corresponding height and can press downwards against the support surface 122 of the tooth 120. That is, the support surface 122 can support the abutting part 211 to prevent the adjusting block 210 from moving downwards, thereby maintaining the headrest and headrest support 200 at this height. When the headrest support 200 is pulled upwards, the abutment portion 211 of the adjusting block 210 abuts against the upper reset member 130. The upper reset member 130 pushes the abutment block to rotate and compresses the spring, causing the adjusting block 210 to rotate downwards from the unfolded position to the compressed position. At this time, the adjusting block 210 separates from the toothed portion 120 of the guide structure, so the headrest support 200 can move downwards to reset. When the adjusting block 210 moves downwards to abut against the lower reset member 140, the lower reset member 140 pushes the abutment block upwards to rotate and causes the elastic member 220 to return to its original deformation, thereby causing the adjusting block 210 to switch from the compressed position to the unfolded position. Thus, the headrest support 200 can be pulled upwards to adjust the headrest height. Therefore, the headrest adjustment structure of this embodiment can achieve headrest height adjustment simply by using the guide structure and the adjusting block 210. Furthermore, adjustment can be performed by directly pulling the headrest or headrest support 200, making operation very convenient and user-friendly.

[0040] It is understood that both the upper reset member 130 and the lower reset member 140 are located within the slide groove 110. Specifically, in the horizontal direction, both the upper reset member 130 and the lower reset member 140 are located on the side of the guide structure closer to the interior of the slide groove 110. This allows them to abut against the abutment portion 211 and enable the adjusting block 210 to switch between the compressed and extended positions. Specifically, the upper reset member 130 is located on the side of the guide structure closer to the interior of the slide groove 110, such that when the upper reset member 130 pushes the abutment block downwards, the compression of the elastic member 220 is greater than when the guide surface 121 of the toothed portion 120 pushes the abutment block to rotate. That is, when the adjusting block 210 is in the compressed position, the compression of the spring is greater than when the adjusting block 210 moves upwards along the guide structure. This avoids the headrest bracket 200 from directly switching to the compressed state due to the abutment of the toothed portion 120 during upward movement, thus preventing the headrest height from being unable to be adjusted further upwards. Similarly, since the adjusting block 210 is separated from the guide structure when it is in the compressed position, the lower reset member 140 is located on the side of the guide structure near the inside of the slide groove 110, thereby enabling the lower reset member 140 to accurately abut against the abutment part 211 and push the adjusting block 210 to rotate upward to the unfolded position.

[0041] Reference Figures 1 to 11 In some embodiments, one of the adjusting block 210 and the headrest bracket 200 is equipped with a rotating shaft 230, and the other has a strip groove 212 arranged in the vertical direction and adapted to the rotating shaft 230. The rotating shaft 230 is movably inserted into the strip groove 212, and the adjusting block 210 can rotate around the rotating shaft 230 and move along the strip groove 212. One of the adjusting block 210 and the headrest bracket 200 is provided with a positioning post 240, and the other has a positioning groove. The positioning groove includes a transverse groove 241 and a longitudinal groove 242 that are interconnected. When the positioning post 240 is embedded in the transverse groove 241, the adjusting block 210 can move. When block 210 is in the unfolded position, the upper reset member 130 can press against the abutment part 211 and push the adjusting block 210 to rotate downwards to compress the elastic member 220. The positioning post 240 can move along the transverse groove 241 and be embedded in the longitudinal groove 242 under the elastic action of the elastic member 220. When the positioning post 240 is embedded in the longitudinal groove 242, the adjusting block 210 is in the compressed position. The lower reset member 140 can press against the abutment part 211 and push the adjusting block 210 to rotate upwards. The positioning post 240 can move along the longitudinal groove 242 and be embedded in the transverse groove 241 under the elastic action of the elastic member 220.

[0042] By adopting the above structure, when the adjusting block 210 is in the unfolded position, the positioning post 240 is embedded in the transverse groove 241. When the headrest bracket 200 is pulled upward so that the abutment part 211 abuts against the upper reset member 130, the upper reset member 130 can squeeze the abutment part 211 and push the positioning post 240 to move along the transverse groove 241 and approach the longitudinal groove 242. During this process, the elastic member 220 is compressed under the squeezing action, and the rotating shaft 230 can move along the strip groove 212. When the positioning post 240 moves to the connection between the transverse groove 241 and the longitudinal groove 242, the positioning post 240 can move into the longitudinal groove 242 under the elastic action of the elastic member 220. Thus, the positioning post 240 can be confined in the longitudinal groove 242, thereby allowing the adjusting block 210 to switch from the unfolded position to the compressed position. At this time, the adjusting block 210 separates from the toothed part 120 of the guide structure, so the headrest bracket 200 can move downward to reset. When the adjusting block 210 moves downward to abut against the lower reset member 140, the lower reset member 140 can push the abutting block upward along the longitudinal groove 242. During this process, the elastic member 220 is compressed under the squeezing action, and the rotating shaft 230 can move along the strip groove 212. When the positioning post 240 moves to the connection between the transverse groove 241 and the longitudinal groove 242, the positioning post 240 can move into the transverse groove 241 under the elastic action of the elastic member 220. This can limit the positioning post 240 in the transverse groove 241, thereby allowing the adjusting block 210 to switch from the compressed position to the unfolded position. Subsequently, the headrest bracket 200 can be pulled upward to adjust the headrest height.

[0043] It is understood that the positioning groove includes a transverse groove 241 and a longitudinal groove 242 that are interconnected. Specifically, the positioning groove can be a right-angled groove composed of the transverse groove 241 and the longitudinal groove 242, or an arc-shaped groove can be connected between the transverse groove 241 and the longitudinal groove 242, thereby enabling the positioning post 240 to move more smoothly in the positioning groove.

[0044] Understandably, referring to Figures 1 to 11In some embodiments, the rotating shaft 230 is mounted on the headrest bracket 200, and the strip groove 212 is formed in the adjusting block 210. At this time, when the upper reset member 130 pushes the adjusting block 210 to rotate downward and switch from the unfolded position to the compressed position, the positioning post 240 moves from the transverse groove 241 to the longitudinal groove 242. That is, the adjusting block 210 first moves laterally away from the guide structure, and then moves downward longitudinally. During this process, the adjusting block 210 can rotate downward around the rotating shaft 230, and at the same time, the adjusting block 210 can also move relative to the rotating shaft 230, so that the rotating shaft 230 moves relative to the adjusting block 210 along the strip groove 212, thereby facilitating the smooth switching of the position of the adjusting block 210. Similarly, when the current reset member 140 pushes the adjusting block 210 to rotate upward and switch from the compressed position to the unfolded position, the positioning post 240 moves from the longitudinal groove 242 to the transverse groove 241. That is, the adjusting block 210 first moves upward in the longitudinal direction and then moves laterally to approach the guide structure. During this process, the adjusting block 210 can rotate upward around the rotating shaft 230, and at the same time, the adjusting block 210 can also move relative to the rotating shaft 230, so that the rotating shaft 230 moves relative to the adjusting block 210 along the strip groove 212, thereby facilitating the smooth switching of the position of the adjusting block 210.

[0045] It is understood that, in addition to mounting the rotating shaft 230 on the headrest bracket 200 and opening the strip groove 212 on the adjusting block 210, in some embodiments the rotating shaft 230 can also be mounted on the adjusting block 210 and the strip groove 212 can be opened on the headrest bracket 200. This utility model does not specifically limit this.

[0046] Reference Figures 1 to 11 In some embodiments, a positioning groove is formed in the headrest bracket 200, and a longitudinal groove 242 is located at the end of the transverse groove 241 away from the guide structure and extends downward. A positioning post 240 is installed on the adjusting block 210 and embedded in the positioning groove. When the positioning post 240 is embedded in the transverse groove 241, the adjusting block 210 is in the unfolded position, and the upper reset member 130 can press against the abutment part 211 and drive the positioning post 240 to move along the transverse groove 241. When the positioning post 240 moves to the end of the transverse groove 241 away from the guide structure, the positioning post 240 can be embedded downward into the longitudinal groove 242 under the elastic action of the elastic member 220, thereby switching the adjusting block 210 from the unfolded position to the compressed position. When the positioning post 240 is embedded in the longitudinal groove 242, the lower reset member 140 can press against the positioning post 240 upward and push the positioning post 240 to move upward along the longitudinal groove 242. When the positioning post 240 moves to the upper end of the longitudinal groove 242, the positioning post 240 can be embedded in the transverse groove 241 under the elastic action of the elastic member 220, thereby switching the adjusting block 210 from the compressed position to the unfolded position.

[0047] It is understandable that, in addition to the positioning groove being made in the headrest bracket 200 and the positioning post 240 being installed in the adjusting block 210, in some embodiments, the positioning groove can also be made in the adjusting block 210 and the positioning post 240 can be installed in the headrest bracket 200. In this case, the longitudinal groove 242 is located at the end of the transverse groove 241 near the guide structure and extends upward.

[0048] In some embodiments, the lower reset member 140 is disposed in the slide groove 110 and aligned with the longitudinal groove 242 in the vertical direction; when the positioning post 240 passes through the longitudinal groove 242, the positioning post 240 protrudes out of the longitudinal groove 242 and can abut against the lower reset member 140, thereby the positioning post 240 can be pushed upward along the longitudinal groove 242 by the lower reset member 140, thereby facilitating the switching of the adjustment block 210 from the compressed position to the unfolded position.

[0049] Reference Figures 1 to 11 To facilitate the lower reset member 140 in pushing the positioning post 240 upward along the longitudinal groove 242, in some embodiments, besides allowing the positioning post 240 to partially protrude outside the longitudinal groove 242, the lower reset member 140 is disposed within the sliding groove 110 and aligned vertically with the longitudinal groove 242. A guide groove 250, arranged vertically and communicating with the lower end of the longitudinal groove 242, is provided on one side wall of the headrest support 200. The lower reset member 140 is movably embedded within the guide groove 250 and can move upward relative to the guide groove 250 into the longitudinal groove 242. Thus, the lower reset member 140 can move upward relative to the headrest support 200 into the longitudinal groove 242 via the guide groove 250 and push the positioning post 240 upward along the longitudinal groove 242, thereby facilitating the switching of the adjusting block 210 from the compressed position to the unfolded position. The lower reset member 140 can be movably embedded in the guide groove 250. Specifically, the lower reset member 140 can be directly disposed in the guide groove 250, or the guide groove 250 can be extended downward to penetrate the lower end of the headrest bracket 200. Thus, during the downward movement of the headrest bracket 200, the lower reset member 140 can be embedded into the guide groove 250 from the lower end of the headrest bracket 200. The present invention does not specifically limit the specific positional relationship between the guide groove 250 and the lower reset member 140.

[0050] Reference Figures 1 to 11In some embodiments, the headrest support 200 has a mounting groove 260 with an opening facing the guide structure, and the adjusting block 210 is embedded in the mounting groove 260. When the adjusting block 210 is in the unfolded position, the abutment portion 211 passes through the opening and extends to the outside of the mounting groove 260. The abutment portion 211 can move into the mounting groove 260 to the compressed position under the pressure of the upper reset member 130. This allows the adjusting block 210 to be hidden inside the headrest support 200, making the installation between the headrest support 200 and the adjusting block 210 more compact, and reducing external impact and damage to the adjusting block 210, thus protecting the adjusting block 210.

[0051] Reference Figures 1 to 11 In some embodiments, the elastic element 220 is a compression spring, the end of the adjusting block 210 away from the guide structure is provided with a limiting post 213, the inner wall of the mounting groove 260 facing the opening is provided with a limiting groove 261, one end of the elastic element 220 is sleeved on the outer periphery of the limiting post 213 and abuts against the adjusting block 210, and the other end of the elastic element 220 is embedded in the limiting groove 261 and abuts against the inner wall of the limiting groove 261.

[0052] In the above structure, the setting of the limiting post 213 and the limiting groove 261 can position and install the elastic element 220 and limit the elastic element 220 between the adjusting block 210 and the inner wall of the mounting groove 260, so as to prevent the elastic element 220 from detaching from the inner wall of the adjusting block 210 and the mounting groove 260 during the rotation or movement of the adjusting block 210, which would cause the adjusting component to fail.

[0053] It is understood that the elastic element 220 can be a compression spring or a torsion spring, and this utility model does not make a specific limitation on this.

[0054] Reference Figures 1 to 11In some embodiments, a groove 111 is provided on one side wall of the slide 110, and a guide structure is arranged in the groove 111 in the vertical direction. In each tooth 120, a guide surface 121 is connected to the inner wall of the groove 111 and extends from bottom to top along the direction close to the slide 110. A support surface 122 is connected between the upper end of the guide surface 121 and the inner wall of the groove 111. The support surface 122 is arranged in the horizontal direction, or the support surface 122 extends from top to bottom along the direction away from the slide 110, thereby enabling the support surface 122 to stably support the abutment 211 and fix the headrest in the set position. The upper end of the guide surface 121 is located inside the groove 111, and the upper reset member 130 is the upper periphery of the groove 111. Thus, the upper reset member 130 is located outside the groove 111, that is, on the side of the tooth 120 near the inside of the slide groove 110. After the headrest bracket 200 moves up until the adjusting block 210 abuts against the uppermost tooth 120, it can continue to move up and directly push the abutting block to rotate through the upper reset member 130, so that the adjusting block 210 switches from the unfolded position to the compressed position. The process is convenient and smooth, and easy for users to use.

[0055] It is understandable that, in addition to being set at the upper periphery of the groove 111, the upper reset member 130 can also be directly set on the side wall of the slide groove 110 near the groove 111 and located above the groove 111 in some embodiments, thereby realizing the contact of the abutment part 211 and completing the switching of the position of the adjustment block 210.

[0056] Reference Figures 1 to 11 In some embodiments, the abutment portion 211 has a guide portion 214 extending downward toward the guide structure. The guide portion 214 can abut against any guide surface 121 and move upward along the guide surface 121. Thus, during the upward movement of the headrest support 200, the guide portion 214 can abut against the guide surfaces 121 of each tooth 120 in the guide structure and move upward along each guide surface 121. This guides the upward movement of the adjustment block 210, making the headrest support 200 move more smoothly and stably, which is beneficial to improving the user experience.

[0057] Reference Figures 1 to 11In some embodiments, a slide groove 110 is formed on the front surface of the backrest 100, and a cover plate 150 is installed on the front surface of the backrest 100 to cover the slide groove 110. The upper end of the backrest 100 has an insertion port 112 communicating with the slide groove 110, and the headrest bracket 200 is movably installed in the slide groove 110 through the insertion port 112. The lower end of the headrest bracket 200 has a slot 270, and a resilient locking block 271 protruding forward relative to the headrest bracket 200 is provided in the slot 270. The plate 150 has a relief groove 151 corresponding to the elastic block 271. The elastic block 271 passes through the relief groove 151 and can move up and down along the relief groove 151. When the elastic block 271 moves to the upper end of the relief groove 151, the elastic block 271 can abut against the upper inner wall of the relief groove 151; or the elastic block 271 can be pressed into the slot 270, so that the headrest bracket 200 can drive the elastic block 271 to continue to move upward to the outside of the slide groove 110.

[0058] In the above structure, the cover plate 150 confines the headrest bracket 200 and the adjustment component within the slide groove 110 of the backrest 100, thereby protecting the adjustment component. The elastic locking block 271 and the clearance groove 151 facilitate the limiting of the headrest bracket 200, preventing it from directly dislodging from the slide groove 110 when the headrest is pulled upwards. Furthermore, this structure also facilitates the installation and removal of the headrest bracket 200. Simply press the elastic locking block 271 to insert it into the locking groove 270, and the headrest bracket 200 can be installed into or removed from the slide groove 110. The structure is simple and easy to install and remove, making it convenient for the replacement or maintenance of the headrest bracket 200.

[0059] An embodiment of this utility model also proposes a seat, which is equipped with a headrest lifting device of any of the above embodiments. Thus, when adjusting the headrest height, it is only necessary to pull the headrest or headrest support 200 to a suitable height. The operation is simple and convenient, which is easy for users to use and helps to improve the user experience.

[0060] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model.

Claims

1. A headrest lifting device, characterized by include: The backrest (100) has a sliding groove (110) arranged in the vertical direction. The headrest bracket (200) is slidably installed in the slide groove (110) and is movable along the slide groove (110); The guide structure includes a plurality of teeth (120) installed on the inner wall of one side of the slide groove (110) in a vertical direction. The teeth (120) have a support surface (122) and a guide surface (121). The guide surface (121) is connected to the support surface (122) and extends from top to bottom in a direction away from the slide groove (110). An adjustment assembly includes an adjustment block (210) and an elastic element (220). The adjustment block (210) is rotatably mounted on the headrest support (200) and has an abutment portion (211) extending toward the guide structure. The elastic element (220) is installed between the adjustment block (210) and the headrest support (200). The adjustment block (210) has a compressed position and an extended position. When the adjustment block (210) is in the extended position, the abutment portion (211) can abut against the guide surface (121) and move upward along the guide surface (121) under the action of the elastic element (220), or the abutment portion (211) can press downward against the support surface (122). When the adjustment block (210) is in the compressed position, the abutment portion (211) can compress the elastic element (220) and separate from the guide structure. The slide groove (110) is provided with an upper reset member (130) and a lower reset member (140), which are respectively located on the upper and lower sides of the guide structure. The upper reset member (130) can push the adjusting block (210) to rotate downward from the unfolded position to the compressed position, and enable the headrest bracket (200) to move downward along the slide groove (110). The lower reset member (140) can abut against the adjusting block (210) and push the adjusting block (210) to rotate upward from the compressed position to the unfolded position. The slide groove (110) is formed on the front surface of the backrest (100), and a cover plate (150) covering the slide groove (110) is installed on the front surface of the backrest (100). The upper end of the backrest (100) is provided with an insertion port (112) that communicates with the slide groove (110). The headrest bracket (200) is movably installed in the slide groove (110) through the insertion port (112). The lower end of the headrest support (200) is provided with a slot (270), and an elastic block (271) protruding forward relative to the headrest support (200) is provided in the slot (270). The cover plate (150) is provided with a relief groove (151) corresponding to the elastic block (271). The elastic block (271) is inserted into the relief groove (151) and can move up and down along the relief groove (151); When the elastic block (271) moves to the upper end of the relief groove (151), the elastic block (271) can abut against the upper inner wall of the relief groove (151); or the elastic block (271) can be pressed into the slot (270), and the headrest bracket (200) can drive the elastic block (271) to continue moving upward to the outside of the slide groove (110).

2. The headrest lifting device according to claim 1, characterized in that One of the adjusting block (210) and the headrest bracket (200) is equipped with a rotating shaft (230), and the other has a strip groove (212) arranged in the vertical direction and adapted to the rotating shaft (230). The rotating shaft (230) is movably inserted in the strip groove (212). The adjusting block (210) can rotate around the rotating shaft (230) and can move along the strip groove (212). The adjusting block (210) and the headrest bracket (200) are provided with a positioning post (240), and the other is provided with a positioning groove, which includes a transverse groove (241) and a longitudinal groove (242) that are interconnected. When the positioning post (240) is embedded in the transverse groove (241), the adjusting block (210) is in the unfolded position, the upper reset member (130) can press against the abutment part (211) and push the adjusting block (210) to rotate downward to compress the elastic member (220), and the positioning post (240) can move along the transverse groove (241) and be embedded in the longitudinal groove (242) under the elastic action of the elastic member (220); When the positioning post (240) is embedded in the longitudinal groove (242), the adjusting block (210) is located in the compressed position, the lower reset member (140) can press against the abutment part (211) and push the adjusting block (210) to rotate upward, the positioning post (240) can move along the longitudinal groove (242) and be embedded in the transverse groove (241) under the elastic action of the elastic member (220).

3. The headrest lifting device according to claim 2, characterized in that The positioning groove is formed in the headrest bracket (200), the longitudinal groove (242) is located at the end of the transverse groove (241) away from the guide structure and extends downward, and the positioning post (240) is installed on the adjusting block (210) and embedded in the positioning groove. When the positioning post (240) is embedded in the transverse groove (241), the adjusting block (210) is in the unfolded position, the upper reset member (130) can press against the abutment part (211) and drive the positioning post (240) to move along the transverse groove (241). When the positioning post (240) moves to the end of the transverse groove (241) away from the guide structure, the positioning post (240) can be embedded downward into the longitudinal groove (242) under the elastic action of the elastic member (220), and drive the adjusting block (210) to move to the compressed position. When the positioning post (240) is embedded in the longitudinal groove (242), the lower reset member (140) can press against the positioning post (240) upward and push the positioning post (240) to move upward along the longitudinal groove (242). When the positioning post (240) moves to the upper end of the longitudinal groove (242), the positioning post (240) can be embedded in the transverse groove (241) under the elastic action of the elastic member (220) and drive the adjusting block (210) to move to the unfolded position.

4. The headrest lifting device according to claim 3, characterized in that The lower reset member (140) is disposed in the slide groove (110) and is aligned with the longitudinal groove (242) in the vertical direction; When the positioning post (240) passes through the longitudinal groove (242), the positioning post (240) partially protrudes outside the longitudinal groove (242) and can abut against the lower reset member (140); Alternatively, a guide groove (250) is provided on one side wall of the headrest support (200) and is arranged in the vertical direction and communicates with the lower end of the longitudinal groove (242). The lower reset member (140) is movably embedded in the guide groove (250) and can move upward relative to the guide groove (250) into the longitudinal groove (242).

5. The headrest lifting device according to any one of claims 1 to 4, characterized in that The headrest bracket (200) has a mounting groove (260) with an opening facing the guide structure, and the adjusting block (210) is embedded in the mounting groove (260); When the adjusting block (210) is in the unfolded position, the abutting part (211) passes through the opening and extends to the outside of the mounting groove (260). The abutting part (211) can move into the inside of the mounting groove (260) to the compressed position under the pressing action of the upper reset member (130).

6. The headrest lifting device according to claim 5, characterized in that The elastic element (220) is a compression spring. The adjusting block (210) has a limiting post (213) at one end away from the guide structure. The mounting groove (260) has a limiting groove (261) on the inner wall facing the opening. One end of the elastic element (220) is sleeved on the outer periphery of the limiting post (213) and abuts against the adjusting block (210). The other end of the elastic element (220) is embedded in the limiting groove (261) and abuts against the inner wall of the limiting groove (261).

7. The headrest lifting device of claim 1, wherein A groove (111) is provided on one side wall of the slide (110). The guide structure is arranged in the groove (111) in the vertical direction. In each tooth (120), the guide surface (121) is connected to the inner wall of the groove (111) and extends from bottom to top along the direction close to the slide (110). The support surface (122) is connected between the upper end of the guide surface (121) and the inner wall of the groove (111). The support surface (122) is arranged horizontally, or the support surface (122) extends from top to bottom in a direction away from the slide groove (110). The upper end of the guide surface (121) is located in the groove (111), and the upper reset member (130) is the upper periphery of the groove (111), or the upper reset member (130) is located on one side wall of the slide (110) near the groove (111) and above the groove (111).

8. The headrest lifting device of claim 1, wherein The abutting portion (211) has a guide portion (214) extending from top to bottom toward the guide structure, the guide portion (214) being able to abut against any of the guide surfaces (121) and move upward along the guide surface (121).

9. A seat, characterized by The device is equipped with a headrest lifting device as described in any one of claims 1 to 8.

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