Lifting headrest

Abstract

The invention discloses a lifting headrest which comprises a U-shaped connecting piece and a head supporting piece capable of moving up and down relative to the U-shaped connecting piece. The connecting piece comprises a front part, a rear part and a joining part, the front part and the rear part are spaced front and back and are approximately vertical, and the same ends of the front part and the rear part are connected with the approximately horizontal joining part; an avoiding groove extending up and down is formed in the rear surface of the head supporting piece, the front portion penetrates into the groove, and the rear portion is located outside and connected with the seat through a connecting point; the head supporting piece ascends and descends through a front movement matching point, and height differences exist between the connecting point and the linkage part and between the movement matching point and the linkage part. When the head supporting piece moves to the end point end and is located between the front portion and the rear portion, the connecting point and the movement matching point are both located in the reverse movement direction of the end point end. According to the scheme, the height position of the headrest is optimized through the height difference, ergonomics is met, meanwhile, the available space in the head supporting piece is increased, large-stroke lifting is achieved, and the supporting height requirements of different users are met.

Description

Technical Field

[0001] This invention relates to the field of furniture, and in particular to a height-adjustable headrest. Background Technology

[0002] A conventional headrest includes a head support and a lifting base. The back of the head support has two vertical slots. The lifting base enters the head support through the slots and moves up and down with the head support. The front of the conventional lifting base serves as the motion reference for the head support, and the rear of the lifting base serves as the installation reference for the headrest. The motion reference and the installation reference are connected by a connecting part, and the three are basically on the same straight line. This means that the height of the connecting part determines both the basic installation position and the movement stroke of the headrest. This makes it impossible to reasonably configure the highest and lowest points of the headrest, and the movement stroke is hindered by the connecting part.

[0003] When the highest point of the headrest is too high or the lowest point is too low, the utilization rate of the headrest's lifting travel will be worse. Although the travel seems large, the actual usable travel is greatly reduced, making it unable to meet the needs of more people and not conforming to ergonomics. The total travel can only be determined by the length of the groove. Assuming that the thickness of the connecting part is reduced to meet the minimum strength standard, only the longer the groove is, the greater the lifting travel of the headrest will be. However, at the same time, it will also greatly reduce the strength of the head support component itself, making it prone to breakage and other problems. Therefore, the groove length is limited by strength requirements, which also limits the lifting travel of the headrest and makes it difficult to meet the different needs of more users.

[0004] Therefore, there is an urgent need for a more ergonomic adjustable headrest that can overcome travel limitations. Summary of the Invention

[0005] To address the aforementioned technical problems, this invention provides a height-adjustable headrest, comprising a U-shaped connector and a head support that can move vertically relative to it. The connector includes a front part, a rear part, and a connecting part. The front and rear parts are spaced apart and are generally vertical, and both are connected to the generally horizontal connecting part at the same end. The rear surface of the head support has a vertically extending clearance groove, with the front part inserted into the groove and the rear part located on the outside and connected to the seat through a connection point. The head support achieves height adjustment through a movement engagement point at the front part, and there is a height difference between the connection point, the movement engagement point, and the connecting part. When the head support moves to its final position between the front and rear parts, both the connection point and the movement engagement point are in the opposite direction of the final position. This solution optimizes the height of the headrest through height difference, conforms to ergonomics, increases the usable space inside the head support, achieves a large range of height adjustment, and adapts to the support height needs of different users.

[0006] The technical solution of this invention is implemented as follows:

[0007] A height-adjustable headrest includes a U-shaped connector, comprising a front portion, a rear portion, and a connecting portion linking the front and rear portions. In the vertical direction, the front and rear portions are connected to the connecting portion at the same end. The front portion has a head support member that moves vertically relative to the connector. The rear surface of the head support member has a vertically extending clearance groove. The front portion enters the head support member through the clearance groove, while the rear portion is located outside the head support member. The clearance groove is configured to avoid the connector when the head support member moves. One end of the clearance groove is an end point, and the head support member has opposite orientations. In the first and second movement directions, when the head support moves in the first movement direction, the connecting part approaches the end point; the rear part has a connection point, which is configured to connect with the seat at the connection point, and there is a height difference between the connection point and the connecting part; the front part has a movement engagement point, which moves up and down with the head support at the movement engagement point, and there is a height difference between the movement engagement point and the connecting part; when the head support moves in the first movement direction until the end point is between the front and the rear, both the connection point and the movement engagement point are in the second movement direction of the end point.

[0008] The front and rear sections are spaced apart and are generally vertical, while the connecting part is generally horizontal. When connected, the connector forms a U-shape in the left and right views, and all three sections can have curvature. The connector remains stationary, while the head support supports the user's head and moves up and down relative to the connector, thus achieving lifting and lowering. A clearance groove on the head support allows the front section to enter the head support, while the rear section, which connects to the seat, is located outside the head support. The connecting part crosses the clearance groove, connecting the inner and outer front and rear sections. The head support moves vertically, with its first and second movement directions being vertical. Taking the first movement direction as downward as an example, the second movement direction is upward. When the head support moves downward, the connecting part and the end point approach each other, with the end point being the upper end of the clearance groove. When the head support moves upward... During movement, the connecting part moves away from the end point, and the connecting piece forms an upward-opening U-shape. Furthermore, there is a height difference between the connecting point and the connecting part. When the end point is between the front and rear, the connecting point is further positioned above the end point, thus lowering the overall position of the head support relative to the connecting point. This prevents the head support from being too high when it reaches its lowest point, making it more ergonomic. Similarly, there is a height difference between the movement engagement point and the connecting part. When the end point is between the front and rear, the movement engagement point is further positioned above the end point, extending its position inside the head support. This increases the reachability of the movement engagement point within the head support, allowing for greater vertical space to be utilized during headrest lifting and lowering, thereby enabling a large-stroke lifting motion of the headrest.

[0009] Taking the first direction of movement as upward as an example, the second direction of movement is downward. When the head support moves upward, the connecting part and the end point are close together, and the end point is the lower end of the clearance groove. When the head support moves downward, the connecting part and the end point are far apart, and the connecting part forms a U-shape with the opening facing downward. On this basis, there is a height difference between the connecting point and the connecting part, and when the end point is between the front and the back, the connecting point is further located below the end point, which raises the overall position of the head support relative to the connecting point, so that the position of the head support is not too low when it moves to the top, which is more in line with ergonomics. There is a height difference between the movement engagement point and the connecting part, and when the end point is between the front and the back, the movement engagement point is further located below the end point, which extends the position of the movement engagement point inside the head support downward, thereby increasing the reachable distance of the movement engagement point inside the head support, making the usable vertical space inside the head support larger when it is raised and lowered, thus realizing the large stroke lifting movement of the headrest.

[0010] In conventional headrests, whether installed on a seat or for headrest height adjustment, the two ends of the connecting part are used as references. The outer end of the connecting part connects to the seat, and the inner end serves as the movement engagement point for the head support. Now, this design uses the connection point with a height difference at the rear as the installation reference for connecting to the seat, and the movement engagement point with a height difference at the front as the height adjustment reference for the head support. Therefore, in this solution, the height difference between the connection point and the connecting part determines the highest or lowest point of the headrest. This allows designers to optimize the headrest position according to actual needs, making its arrangement more ergonomic and preventing the highest point from being too low or the lowest point from being too high when the headrest is supporting the body. Furthermore, the height difference between the movement engagement point and the connecting part increases the reachability of the movement engagement point within the head support, thereby achieving a large-stroke height adjustment to meet the different support height needs of more users.

[0011] Connection points and motion coordination points are points, not just single points.

[0012] Preferably, the front end, away from the connecting part, is provided with a lifting seat, which is located inside the head support and moves in conjunction with the head support. The front part moves indirectly with the head support through the lifting seat, or the front part moves directly with the head support.

[0013] Preferably, the lifting base is equipped with rollers, and the head support has several grooves along the vertical direction inside, with the rollers located in the grooves. When the head support is raised or lowered, the rollers switch between different grooves. The movement engagement point is formed at the engagement position between the roller and the groove; the engagement between the roller and the groove helps to improve the smoothness of the raising and lowering of the head support.

[0014] Preferably, the head support has a forward-protruding seat inside, and a groove is formed on the protruding seat. In this design, there are two rollers, located at the left and right ends of the lifting seat, respectively, and both ends of the protruding seat have grooves.

[0015] Preferably, the length of the front portion is greater than the length of the lifting seat in the vertical direction. The lifting seat is also located in the second movement direction of the connecting portion, and there is a gap between the two to further ensure that there is a height difference between the movement mating point and the connecting portion; at the same time, the longer front portion can also be used to shield the clearance groove.

[0016] Preferably, the head support has a vertical baffle inside, located between the front and rear parts; the first direction of movement is downward, and the baffle is configured to cover the clearance groove when the head support moves in the second direction. When the head support moves in the first direction, the baffle is blocked by the connecting part; the baffle is mainly used to cover the clearance groove, so that the headrest will not affect the aesthetics due to gaps.

[0017] Preferably, the head support has a stop protruding inside, and the top of the baffle has a protrusion. When the head support moves in the second direction of movement until the stop and the protrusion abut, the head support can drive the baffle to move in the second direction of movement together. After the stop and the protrusion abut, the baffle and the head support remain relatively stationary. When the head support continues to move downward, the baffle can no longer block the lower clearance groove, but the part that the baffle cannot block will be covered by the connecting part. Moreover, in order to increase the lifting stroke, the length of the baffle cannot be too long. If it is too long, it will abut against the end of the head support and cause the stroke to be blocked. Therefore, the baffle must basically use the protrusion and the stop to prevent the shorter baffle from being located at a lower position and causing the upper part of the clearance groove to be exposed. Therefore, the baffle has two states: In the first state, the protrusion and the stop are not in contact. At this time, the baffle and the connector remain relatively stationary, while the baffle moves up and down relative to the head support, which can adaptively block the exposed clearance groove; In the second state, the protrusion and the stop are in contact. The baffle and the head support remain relatively stationary, while the baffle moves up and down relative to the connector, which prevents the shorter baffle from failing to cover the upper part of the clearance groove when the baffle is located in the lower position of the clearance groove along with the connector.

[0018] Preferably, the head support also has a notch that communicates with the clearance groove and is located in the first direction of movement of the clearance groove. The notch is configured so that when the head support moves in the second direction, the connector extends out of the clearance groove from the notch. The presence of the notch increases the reachability of the connector outside the head support, allowing it to extend out of the head support and giving the head support a greater stroke away from the connecting part, further increasing the lifting stroke.

[0019] Preferably, the head support includes a mating part that engages with the front movement. In the vertical direction, the end point of the clearance groove is located in the middle of the mating part. The mating part is configured such that the clearance groove extends along the first movement direction, and the mating part remains intact in the second movement direction of the clearance groove. The mating part is a plate with only the clearance groove formed on it, and the clearance groove occupies a small proportion of its surface, only starting from near the middle, thereby ensuring the integrity of other parts of the mating part. At least the mating part with the clearance groove facing upwards can remain intact, which can achieve large-stroke lifting and lowering while increasing the strength of the head support.

[0020] Preferably, a receiving groove is formed between the front, rear, and connecting parts. The receiving groove is configured such that when the head support moves, the connecting seat avoids the mating part in the second movement direction of the avoidance groove, and the opening direction of the receiving groove is in the same direction as the second movement direction. The receiving groove is naturally formed between the front, rear, and connecting parts, and also has the effect of avoiding interference, ensuring that the lifting and lowering of the head support is not interfered with.

[0021] Preferably, the head support also includes a support pad installed in front of the mating part, with the front part located between the mating part and the support pad.

[0022] Preferably, a mounting seat is provided on the rear part, and the length of the mounting seat is less than the length of the rear part in the vertical direction, and the mounting seat is located in the second movement direction of the connecting part.

[0023] Preferably, the opening of the connector is oriented in the same direction as the second movement direction.

[0024] The design starting point, concept, and beneficial effects of the present invention, which adopts the above technical solution, are as follows:

[0025] The front and rear sections are spaced apart and are generally vertical, while the connecting part is generally horizontal. When connected, the connector forms a U-shape in the left and right views, and all three sections can have curvature. The connector remains stationary, while the head support supports the user's head and moves up and down relative to the connector, thus achieving lifting and lowering. A clearance groove on the head support allows the front section to enter the head support, while the rear section, which connects to the seat, is located outside the head support. The connecting part crosses the clearance groove, connecting the inner and outer front and rear sections. The head support moves vertically, with its first and second movement directions being vertical. Taking the first movement direction as downward as an example, the second movement direction is upward. When the head support moves downward, the connecting part and the end point approach each other, with the end point being the upper end of the clearance groove. When the head support moves upward... During movement, the connecting part moves away from the end point, and the connecting piece forms an upward-opening U-shape. Furthermore, there is a height difference between the connecting point and the connecting part. When the end point is between the front and rear, the connecting point is further positioned above the end point, thus lowering the overall position of the head support relative to the connecting point. This prevents the head support from being too high when it reaches its lowest point, making it more ergonomic. Similarly, there is a height difference between the movement engagement point and the connecting part. When the end point is between the front and rear, the movement engagement point is further positioned above the end point, extending its position inside the head support. This increases the reachability of the movement engagement point within the head support, allowing for greater vertical space to be utilized during headrest lifting and lowering, thereby enabling a large-stroke lifting motion of the headrest.

[0026] Taking the first direction of movement as upward as an example, the second direction of movement is downward. When the head support moves upward, the connecting part and the end point are close together, and the end point is the lower end of the clearance groove. When the head support moves downward, the connecting part and the end point are far apart, and the connecting part forms a U-shape with the opening facing downward. On this basis, there is a height difference between the connecting point and the connecting part, and when the end point is between the front and the back, the connecting point is further located below the end point, which raises the overall position of the head support relative to the connecting point, so that the position of the head support is not too low when it moves to the top, which is more in line with ergonomics. There is a height difference between the movement engagement point and the connecting part, and when the end point is between the front and the back, the movement engagement point is further located below the end point, which extends the position of the movement engagement point inside the head support downward, thereby increasing the reachable distance of the movement engagement point inside the head support, making the usable vertical space inside the head support larger when it is raised and lowered, thus realizing the large stroke lifting movement of the headrest.

[0027] In conventional headrests, whether installed on a seat or for headrest height adjustment, the two ends of the connecting part are used as references. The outer end of the connecting part connects to the seat, and the inner end serves as the movement engagement point for the head support. Now, this design uses the connection point with a height difference at the rear as the installation reference for connecting to the seat, and the movement engagement point with a height difference at the front as the height adjustment reference for the head support. Therefore, in this solution, the height difference between the connection point and the connecting part determines the highest or lowest point of the headrest. This allows designers to optimize the headrest position according to actual needs, making its arrangement more ergonomic and preventing the highest point from being too low or the lowest point from being too high when the headrest is supporting the body. Furthermore, the height difference between the movement engagement point and the connecting part increases the reachability of the movement engagement point within the head support, thereby achieving a large-stroke height adjustment to meet the different support height needs of more users.

[0028] The presence of the notch increases the reachability of the connector outside the head support, allowing it to extend beyond the head support and giving the head support a greater range of motion away from the connector, thus further increasing the lifting range. Attached Figure Description

[0029] Figure 1 This is a three-dimensional structural diagram of the head support member when it moves to its lowest point in an embodiment of the present invention. Figure 1 ;

[0030] Figure 2 This is a three-dimensional structural diagram of the head support member when it moves to its lowest point in an embodiment of the present invention. Figure 2 ;

[0031] Figure 3 This is a three-dimensional structural diagram of the head support member when it reaches its highest point in an embodiment of the present invention. Figure 1 ;

[0032] Figure 4 This is a three-dimensional structural diagram of the head support member when it reaches its highest point in an embodiment of the present invention. Figure 2 ;

[0033] Figure 5 This is a schematic diagram of the three-dimensional structure of a conventional headrest in an embodiment of the present invention. Figure 1 ;

[0034] Figure 6 This is a schematic diagram of the three-dimensional structure of a conventional headrest in an embodiment of the present invention. Figure 2 ;

[0035] Figure 7 This is a three-dimensional structural diagram of the baffle in the second state in an embodiment of the present invention;

[0036] Figure 8 This is a three-dimensional structural diagram of the connector with a lifting seat and a mounting seat in an embodiment of the present invention;

[0037] Figure 9 This is a three-dimensional structural diagram of the connector in an embodiment of the present invention. Figure 1 ;

[0038] Figure 10 This is a three-dimensional structural diagram of the mating component in an embodiment of the present invention. Figure 1 ;

[0039] Figure 11 This is a three-dimensional structural diagram of the connector in an embodiment of the present invention. Figure 2 ;

[0040] Figure 12 This is a three-dimensional structural diagram of the mating component in an embodiment of the present invention. Figure 2 .

[0041] The reference numerals in the attached drawings are as follows: connector 1; front part 11; rear part 12; connecting part 13; receiving groove 14; head support 2; clearance groove 21; end point 211; mating part 22; protruding seat 24; groove 241; notch 25; lifting seat 3; roller 31; mounting seat 4; baffle 5; protrusion 51; stop 6; connection point 7; moving mating point 8. Detailed Implementation

[0042] To better understand the above-mentioned objectives, features, and advantages of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0043] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and therefore the scope of protection of the invention is not limited to the specific embodiments disclosed below.

[0044] In the description of this invention, the terms "first," "second," "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0045] The specific embodiments of the present invention are as follows:

[0046] like Figure 1-4As shown, the present invention provides a height-adjustable headrest, including a U-shaped connector 1. The connector 1 includes a front part 11, a rear part 12, and a connecting part 13 connecting the front part 11 and the rear part 12. In the vertical direction, the front part 11 and the rear part 12 are connected to the connecting part 13 at the same end. A head support 2 that moves vertically relative to the connector 1 is provided on the front part 11. A vertically extending clearance groove 21 is provided on the rear surface of the head support 2. The front part 11 enters the interior of the head support 2 through the clearance groove 21, and the rear part 12 is located outside the head support 2. The clearance groove 21 is configured to avoid the connector 1 when the head support 2 moves. One end of the clearance groove 21 is an end point 211. Having opposite first and second movement directions, when the head support 2 moves in the first movement direction, the connecting part 13 approaches the end point 211; the rear part 12 has a connection point 7, which is configured to connect with the seat at the connection point 7, and there is a height difference between the connection point 7 and the connecting part 13; the front part 11 has a movement engagement point 8, which moves up and down with the head support 2 at the movement engagement point 8, and there is a height difference between the movement engagement point 8 and the connecting part 13; when the head support 2 moves in the first movement direction until the end point 211 is between the front part 11 and the rear part 12, both the connection point 7 and the movement engagement point 8 are in the second movement direction of the end point 211.

[0047] The front part 11 and the rear part 12 are arranged at intervals and are both roughly vertical. The connecting part 13 is roughly horizontal. After the three are connected, the connecting part 1 is U-shaped in the left and right views, and all three can have curvature. The connecting part 1 remains stationary. The head support 2 is used to support the human head and moves up and down relative to the connecting part 1, thereby realizing lifting and lowering. The clearance groove 21 opened on the head support 2 allows the front part 11 to enter the interior of the head support 2. The rear part 12 needs to be connected to the seat and is located outside the head support 2. The connecting part 13 crosses the clearance groove 21 to connect the inner and outer front part 11 and rear part 12. The head support 2 moves in the vertical direction. Its first movement direction and second movement direction are vertical and vertical respectively. Taking the first movement direction as downward as an example, the second movement direction is upward. When the head support 2 moves downward, the connecting part 13 and the end point 211 approach each other. The end point 211 is the upper end of the clearance groove 21. When the head support 2 moves upward, the connecting part 13 and the end point 211 approach each other. The end point 211 is the upper end of the clearance groove 21. At this time, the connecting part 13 is far away from the end point 211, and the connecting part 1 is U-shaped with the opening facing upward. On this basis, there is a height difference between the connecting point 7 and the connecting part 13. When the end point 211 is between the front part 11 and the rear part 12, the connecting point 7 is further located above the end point 211, which lowers the overall position of the head support 2 relative to the connecting point 7, so that the position of the head support 2 is not too high when it moves to the lowest point, which is more in line with ergonomics. There is a height difference between the movement coordination point 8 and the connecting part 13. When the end point 211 is between the front part 11 and the rear part 12, the movement coordination point 8 is further located above the end point 211, which extends the position of the movement coordination point 8 inside the head support 2 upward. This increases the reachable distance of the movement coordination point 8 inside the head support 2, making the vertical space available inside the head support 2 more when it is raised and lowered, thereby realizing the large stroke lifting and lowering movement of the headrest.

[0048] Taking the first direction of movement as upward as an example, the second direction of movement is downward. When the head support 2 moves upward, the connecting part 13 and the end point 211 approach each other, and the end point 211 is the lower end of the clearance groove 21. When the head support 2 moves downward, the connecting part 13 and the end point 211 move away from each other. At this time, the connecting part 1 is in a U-shape with the opening facing downward. On this basis, there is a height difference between the connection point 7 and the connecting part 13, and when the end point 211 is located between the front part 11 and the rear part 12, the connection point 7 is further located below the end point 211, that is, the overall height of the head support 2 is increased. Compared to the position of connection point 7, the head support 2 is positioned so that it is not too low when it moves to the top, which is more ergonomic. There is a height difference between the movement engagement point 8 and the connecting part 13. When the end point 211 is located between the front part 11 and the rear part 12, the movement engagement point 8 is further located below the end point 211, that is, the position of the movement engagement point 8 inside the head support 2 is extended downward. This increases the reachable distance of the movement engagement point 8 inside the head support 2, making the vertical space available inside the head support 2 more when it is raised and lowered, thereby realizing a large stroke lifting movement of the headrest.

[0049] In conventional headrests, such as Figure 5 , 6 As shown, the height adjustment of both the seat and the headrest is based on the two ends of the connecting part 13. That is, the outer end of the connecting part 13 is connected to the seat, and the inner end of the connecting part 13 is the movement engagement point 8 of the head support 2. Now, the connection point 7 with a height difference on the rear part 12 is used as the installation reference for connecting to the seat, and the movement engagement point 8 with a height difference on the front part 11 is used as the height adjustment reference for the head support 2. Therefore, in this solution, the height difference between the connection point 7 and the connecting part 13 determines the highest or lowest point of the headrest, which is beneficial for designers to optimize the headrest position according to actual needs, making its arrangement more ergonomic and preventing the highest point from being too low or the lowest point from being too high when the headrest is supported. The height difference between the movement engagement point 8 and the connecting part 13 increases the reachability of the movement engagement point 8 inside the head support 2, thereby achieving a large stroke height adjustment, which can meet the different support height needs of more users.

[0050] Connection point 7 and motion coordination point 8 are points, not just single points.

[0051] In this embodiment, the first direction of movement is downward and the second direction of movement is upward; however, for the opposite directions, the solution will not be substantially changed, only affecting the application of the baffle 5.

[0052] Specifically, such as Figure 9-12As shown, the head support 2 includes a mating part 22 and a support pad (not shown) disposed on the front side of the mating part 22. The mating part 22 is a plate to ensure strength. The connecting part 1 is in kinetic engagement with the mating part 22, and the front part 11 of the connecting part 1 is located in the space between the support pad and the mating part 22. The front part 11, the rear part 12, and the connecting part 13 of the connecting part 1 are all plate-shaped. The front part 11 and the rear part 12 are vertical, and the connecting part 13 is horizontally connected to the lower ends of the front part 11 and the rear part 12. The length of the front part 11 and the rear part 12 in the vertical direction is much greater than the length of the connecting part 13 in the front-back direction. A receiving groove 14 is naturally formed between the three. The opening of the receiving groove 14 faces upward, that is, the opening of the connecting part 1 faces upward.

[0053] like Figure 8 As shown, the upper part of the front part 11 is fixed with a lifting seat 3 by screws, and the rear part 12 is provided with a mounting seat 4. There is a height difference between the lifting seat 3 and the mounting seat 4 and the connecting part 13, that is, the lifting seat 3 and the mounting seat 4 are both located above the connecting part 13.

[0054] Furthermore, the lifting seat 3 is located inside the head support 2 and moves in coordination with the head support 2. In this embodiment, the front part 11 moves in coordination with the head support 2 indirectly through the lifting seat 3. Of course, the front part 11 can also move in coordination with the head support 2 directly, such as by integrally forming two left and right extending seats on the upper end of the front part 11 to move in coordination with the head support 2. The lifting seat 3 is provided with rollers 31. Inside the head support 2, specifically on the inner surface of the mating part 22, there is a forward-protruding protrusion seat 24. There are two rollers 31, located at the left and right ends of the lifting seat 3 and partially extending beyond the ends of the lifting seat 3. There are several grooves 241 on the left and right ends of the protrusion seat 24. The grooves 241 are distributed in the vertical direction. The two rollers 31 are located in the grooves 241 on both sides. When the head support 2 is raised and lowered, the rollers 31 switch between different grooves 241. The movement engagement point 8 is formed at the engagement position of the rollers 31 and the grooves 241. The engagement of the rollers 31 and the grooves 241 helps to improve the smoothness of the raising and lowering of the head support 2.

[0055] In addition, in the vertical direction, the length of the front part 11 is greater than the length of the lifting seat 3, so that the lifting seat 3 is located above the connecting part 13, and there is a gap between the two, which further ensures that there is a height difference between the motion mating point 8 and the connecting part 13; at the same time, the longer front part 11 can also be used to block the avoidance groove 21.

[0056] Mounting seat 4 is used to connect the seat. Mounting seat 4 is also fixedly connected to the integrally formed protrusion on the rear part 12 by screws. In the vertical direction, the length of mounting seat 4 is also less than the length of the rear part 12, so that mounting seat 4 is located above the connecting part 13 and the connection point 7 has a height difference with the connecting part 13.

[0057] Furthermore, such as Figure 2 , 4 As shown in Figures 10 and 12, a notch 25 is also provided on the mating part 22 of the head support member 2. The notch 25 is connected to the clearance groove 21 and is located below the clearance groove 21. The notch 25 is configured so that when the head support member 2 moves upward, the connecting member 1 can extend out of the clearance groove 21 from the notch 25. The presence of the notch 25 can increase the reachability of the connecting member 1 outside the head support member 2, so that it can extend out of the head support member 2, allowing the head support member 2 to have a movement stroke further away from the connecting part 13, and further increasing the lifting stroke. Furthermore, in the vertical direction, the end point 211 of the clearance groove 21 is located in the middle of the mating part 22. The mating part 22 is configured such that the clearance groove 21 extends downwards, and the mating part 22 above the clearance groove 21 remains intact. The mating part 22 is a plate with only the clearance groove 21 cut on it, and the clearance groove 21 occupies a small proportion of its size, only cut from near the middle, thereby ensuring the integrity of other parts of the mating part 22, at least the mating part 22 above the clearance groove 21 remains intact, which can achieve large stroke lifting and increase the strength of the head support 2. The receiving groove 14 is configured such that when the head support 2 moves, the connecting seat avoids the mating part 22 above the clearance groove 21. The receiving groove 14 also has the effect of avoiding interference, ensuring that the lifting of the head support 2 is not interfered with.

[0058] In summary, the complete stroke of the head support 2 is the distance between the highest and lowest positions of the movement mating point 8, i.e., the distance between the uppermost groove 241 and the lowermost groove 241. When the roller 31 is in the uppermost groove 241, the head support 2 is at the lowest point of its stroke. The configuration of the connecting piece 1 ensures that the lowest point of the head support 2 is not too high, which is more ergonomic. At the same time, since the front part 11 extends upward inside the head support 2, the groove 241 can be opened to be close to the upper end of the mating piece 22, thereby increasing the reachable distance (i.e., the upper stroke) in this direction, and without having to... The clearance groove 21 extends to the upper end of the mating part 22 to ensure aesthetics and strength. When the roller 31 is in the lowermost groove 241, the head support 2 is at the highest point of its stroke. Since the connecting part 1 can extend from the notch 25, the lowermost groove 241 can be closer to the lower end of the mating part 22 without interfering with the connecting part 1 and the head support 2, thereby increasing the reachable distance of the connecting part 1 outside the head support 2 (i.e., the lower stroke). With the same clearance groove length, the headrest lifting stroke of this solution can be increased by 10%-50% or even more compared to conventional headrests.

[0059] Furthermore, when the first direction of movement is downward and the second direction of movement is upward, the head support 2 is provided with a vertical baffle 5, and the baffle 5 is located between the front part 11 and the rear part 12, that is, the baffle 5 is located in the receiving groove 14; the baffle 5 is configured such that when the head support 2 moves upward, the baffle 5 covers the clearance groove 21; when the head support 2 moves downward, the baffle 5 is blocked by the connecting part 13; the baffle 5 is mainly used to cover the clearance groove 21, so that the headrest will not affect the aesthetics due to gaps.

[0060] Specifically, such as Figure 1-4 As shown in Figure 7, the head support member 2 has a stop 6 protruding inside, and the top of the baffle 5 has a protrusion 51. When the head support member 2 moves upward until the stop 6 and the protrusion 51 abut, the head support member 2 can drive the baffle 5 to move upward together. After the stop 6 and the protrusion 51 abut, the baffle 5 and the head support member 2 remain relatively stationary. When the head support member 2 continues to move downward, the baffle 5 can no longer block the lower clearance groove 21. However, the part that the baffle 5 cannot block will be blocked by the connecting member 1. Moreover, in order to increase the lifting stroke, the length of the baffle 5 cannot be too long. If it is too long, it will abut against the end of the head support member 2 and cause the stroke to be blocked. Therefore, the baffle 5 basically has to use the protrusion 51 and the stop 6 to prevent the shorter baffle 5 from being located at a lower position and causing the clearance groove 21 to be exposed. Therefore, the baffle 5 has two states: In the first state, the protrusion 51 and the stop 6 do not abut. At this time, the baffle 5 remains relatively stationary with the connector 1 due to gravity, and moves up and down relative to the head support 2, which can adaptively block the exposed relief groove 21; In the second state, the protrusion 51 and the stop 6 abut. The baffle 5 remains relatively stationary with the head support 2, and moves up and down relative to the connector 1, which prevents the shorter baffle 5 from failing to cover the upper part of the relief groove 21 when the baffle 5 is located in the lower position of the relief groove 21 along with the connector 1.

Claims

1. A height-adjustable headrest, characterized in that: The device includes a U-shaped connector, comprising a front part, a rear part, and a connecting portion connecting the front and rear parts. In the vertical direction, the front and rear parts are connected to the connecting portion at the same end. The front part has a head support that moves vertically relative to the connector. The rear surface of the head support has a vertically extending clearance groove. The front part enters the head support through the clearance groove, while the rear part is located outside the head support. The clearance groove is configured to avoid the connector when the head support moves. One end of the clearance groove is a terminal end. The head support has two opposing movement directions: a first movement direction and a second movement direction. When the head support moves in the first movement direction, the connecting portion approaches the terminal end. The rear part has a connection point, configured to connect to the seat at the connection point, and there is a height difference between the connection point and the connecting portion. The front part has a movement engagement point, where it moves vertically with the head support. There is a height difference between the movement engagement point and the connecting portion. When the head support moves in the first movement direction until the terminal end is between the front and rear parts, both the connection point and the movement engagement point are in the second movement direction of the terminal end.

2. The adjustable headrest according to claim 1, characterized in that: A lifting seat is provided at the front end away from the connecting part. The lifting seat is located inside the head support and moves in coordination with the head support.

3. The adjustable headrest according to claim 2, characterized in that: The lifting platform is equipped with rollers, and the head support has several grooves along the vertical direction inside. The rollers are located in the grooves, and the rollers switch between different grooves when the head support is raised or lowered.

4. The adjustable headrest according to claim 3, characterized in that: The head support has a forward-protruding protrusion inside, and a groove is formed on the protrusion.

5. The adjustable headrest according to any one of claims 2, characterized in that: In the vertical direction, the length of the front part is greater than the length of the lifting seat.

6. The adjustable headrest according to claim 1, characterized in that: The head support has a vertical baffle inside, and the baffle is located between the front and the rear. The first direction of movement is downward, and the baffle is configured to block the clearance groove when the head support moves in the second direction.

7. The adjustable headrest according to claim 6, characterized in that: The head support has a stop protruding inside, and the top of the baffle has a protrusion. When the head support moves in the second movement direction until the stop and the protrusion come into contact, the head support can drive the baffle to move together in the second movement direction.

8. The adjustable headrest according to claim 1, characterized in that: The head support also has a notch, which is connected to the clearance groove and is located in the first movement direction of the clearance groove. The notch is configured so that when the head support moves in the second movement direction, the connecting member extends out of the clearance groove from the notch.

9. The adjustable headrest according to claim 1, characterized in that: The head support includes a mating member that moves with the front part. In the vertical direction, the end point of the clearance groove is located in the middle of the mating member. The mating member is configured such that the clearance groove extends along a first direction of movement, and the mating member remains intact in a second direction of movement of the clearance groove.

10. The adjustable headrest according to claim 9, characterized in that: A receiving groove is formed between the front, rear and connecting parts. The receiving groove is configured such that when the head support moves, the connecting seat avoids the mating part in the second movement direction of the avoidance groove. The opening direction of the receiving groove is the same as the second movement direction.

11. The adjustable headrest according to claim 9, characterized in that: The head support also includes a support pad installed in front of the mating part, with the front part located between the mating part and the support pad.

12. The adjustable headrest according to claim 1, characterized in that: A mounting base is provided at the rear, and in the vertical direction, the length of the mounting base is less than the length of the rear part. The mounting base is located in the second movement direction of the connecting part.

13. The adjustable headrest according to claim 1, characterized in that: The opening of the connector faces the same direction as the second movement direction.

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