Seat headrest mounting structure

Abstract

The utility model belongs to the technical field of seats, and discloses a seat headrest installation structure which comprises a supporting column installed on a seat backrest and a headrest frame used for installing a headrest, the headrest frame is provided with a first arc face and a sliding groove consistent with the first arc face in the extending direction, and the supporting column is provided with a second arc face supporting the first arc face and matched with the first arc face. The first cambered surface slides relative to the second cambered surface when the pillow frame is pushed and pulled, and the supporting column is provided with a sliding block matched with the sliding groove for limiting; the headrest frame slides along the cambered surface through cambered surface matching between the headrest frame and the supporting column, the headrest moves along with the headrest frame and moves in the horizontal direction and the vertical direction at the same time, the front-back position of the headrest can be adjusted while the inclination angle of the headrest is adjusted, and adjustment of the inclination angle and the front-back position of the headrest is completed through two independent mechanisms. The structure is complicated, and the adjustment operation is inconvenient.

Description

Technical Field

[0001] The utility model belongs to the technical field of seats, and in particular relates to a seat headrest installation structure. Background Art

[0002] The Chinese utility model patent with announcement number CN219109055U discloses a device for adjusting the headrest of a chair forward and backward, wherein a headrest mounting plate is connected to the end of the connecting column of the adjusting column through a damping shaft, the adjusting column is slidably connected inside a fixed shell, a compression spring is arranged inside the fixed shell to abut against the adjusting column, a positioning slot is arranged on the surface of the adjusting column, a through hole is arranged on the surface of the fixed shell, and a positioning rod is installed through a reset spring, when the headrest is adjusted, the headrest is tilted forward or tilted backward to adjust the angle by rotating the damping shaft; by pulling the positioning rod out of the positioning slot, the adjusting column is extended forward under the elastic force of the compression spring, and the positioning rod is re-engaged in the positioning slot to position and fix the adjusting column, thereby realizing forward movement and adjustment of the headrest; and when moving the headrest backward, after pulling the positioning rod out of the positioning slot, a force is applied to make the adjusting column squeeze the compression spring backward, and the positioning rod is re-engaged in the positioning slot to position and fix the adjusting column, thereby realizing backward movement and adjustment of the headrest.

[0003] This headrest structure adjusts the tilt angle and front and rear movement of the headrest through two independent mechanisms. When the seat is in use, after the backrest angle is adjusted according to the sitting posture, the headrest flips over with the backrest. In order to readapt to the support for the head, the tilt angle and front and rear position of the headrest need to be adjusted again after the backrest posture is adjusted. However, in the above-mentioned existing headrest structure, the tilt angle and front and rear position of the headrest are adjusted separately, and the adjustment operation is not convenient enough. Utility Model Content

[0004] In view of the deficiencies in the prior art, the utility model aims to provide a seat headrest mounting structure which can simultaneously adjust the tilt angle and the front-rear position of the headrest.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A seat headrest mounting structure comprises a pillar mounted on a seat back and a pillow frame for mounting the headrest, the pillow frame being provided with a first curved surface and a slide groove extending in the same direction as the first curved surface, the pillar being provided with a second curved surface supporting the first curved surface and matching the first curved surface, the first curved surface sliding relative to the second curved surface when the pillow frame is pushed or pulled, and the pillar being provided with a slider matching the slide groove for limiting the position.

[0007] The utility model has the following beneficial effects:

[0008] The seat headrest mounting structure has a pillow frame and a support column that can slide relatively to each other through the cooperation of arc surfaces. When the headrest is pushed or pulled to move with the pillow frame, the headrest will move relatively in the horizontal and vertical directions at the same time, so that the headrest's inclination angle can be adjusted while the headrest's front and rear position can be adjusted. Compared with the existing structure in which two independent mechanisms are arranged to respectively adjust the headrest's inclination angle and front and rear position, the structure is simpler and more compact, and the adjustment operation is also more convenient.

[0009] Preferably, a guide groove portion is provided inside the pillow frame corresponding to the slide groove, and the sliding block is provided with a guide matching portion, and the guide matching portion and the guide groove portion are slidably matched.

[0010] Preferably, a plurality of positioning slots are arranged on the side walls of the guide slot portion, and the guide matching portion is assembled with a connecting block via a return spring, and the block is stuck in the positioning slot under the tension of the return spring, and the block compresses the return spring and disengages from the positioning slot when being squeezed and pushed.

[0011] Preferably, the positioning slot is arranged on the slot side wall on one side of the guide slot portion, and the guide matching portion is provided with an assembly slot cavity, in which the block is assembled and connected via the return spring.

[0012] Preferably, a first slot hole is arranged in the assembly slot cavity, the clamping block is provided with a first guide shaft and is guidingly connected to the first slot hole, a second slot hole is arranged in the assembly slot cavity, and the clamping block is provided with a second guide shaft corresponding to the second slot hole; the clamping block is squeezed and pushed to compress the return spring, and retracts into the assembly slot cavity under the guidance of the first slot hole and the second slot hole.

[0013] Preferably, the block is provided with a first locking hole, and the assembly slot is provided with a second locking hole aligned with the first locking hole when the block is snapped into the positioning slot, and plug-in locking rods are inserted into the first locking hole and the second locking hole.

[0014] Preferably, the positioning slots are symmetrically arranged on the slot side walls on both sides, the guide matching portion is provided with a sliding slot, the sliding slot corresponds to the positioning slots on both sides, two clamping blocks are symmetrically slidably arranged in the sliding slot, the return spring is connected and arranged between the two clamping blocks, the clamping block has a positioning clamping foot that is inserted into the positioning slot, and an unlocking block used to squeeze and compress the return spring.

[0015] Preferably, worm gear teeth are provided on the bottom wall of the guide groove, a worm shaft is pivotally provided on the guide matching portion, the transmission teeth of the worm shaft are matched with the worm gear teeth, and the end of the worm shaft is exposed and extends to the tail end of the pillow frame to connect the adjustment handle.

[0016] Preferably, the back of the headrest is hinged to the pillow frame.

[0017] Preferably, an adjustment box is arranged on the front side of the pillow frame, and an adjustment column extending into the adjustment box is arranged on the back side of the headrest, and a locking groove is provided on the surface of the adjustment column; a positioning rod is arranged on the adjustment box, and the positioning rod is clamped in any of the locking grooves to position the adjustment column in the adjustment box.

[0018] Preferably, a compression spring abutting against the adjustment column is arranged in the adjustment box.

[0019] Preferably, the support column has an outer column shell, and an inner column body is arranged inside the outer column shell and can move up and down relative to the outer column shell and be positioned and fixed.

[0020] Preferably, the shell wall of the outer column shell is provided with a plurality of positioning holes in the height direction, the inner column body is provided with spring holes facing the positioning holes, and positioning beads which are positioned and matched with the positioning holes are provided in the spring holes through spring connection.

[0021] Preferably, the inner cylinder has external threads, and the top end of the outer cylinder shell is equipped with a screw drive sleeve that cooperates with the threads of the inner cylinder and rotates independently. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a side view of a first embodiment of the seat headrest mounting structure of the utility model;

[0023] Figure 2 for Figure 1 Assembly diagram of pillow frame and pillars in the embodiment;

[0024] Figure 3 for Figure 2 Schematic diagram of the slider in ;

[0025] Figure 4 for Figure 1 The headrest of the embodiment is moved forward and flipped downward to adjust the support angle;

[0026] Figure 5 for Figure 1 The headrest of the embodiment is moved backward and flipped upward to adjust the support angle;

[0027] Figure 6 This is a structural diagram of the pillow frame locking and fixing according to the second embodiment of the utility model;

[0028] Figure 7 This is the third embodiment of the seat headrest installation structure of the utility model;

[0029] Figure 8 for Figure 7 A side view of an embodiment;

[0030] Fig. 9 It is a side view of a fourth embodiment of the seat headrest mounting structure of the utility model;

[0031] Fig.10 This is one of the connection diagrams of the headrest and pillow frame of the seat headrest installation structure of the utility model;

[0032] Fig.11 This is a structural diagram of an implementation of the column lifting of the seat headrest installation structure of the utility model;

[0033] Fig.12 Another structural diagram of the column lifting of the seat headrest mounting structure of the utility model.

[0034] In the figure: 1, headrest; 2, pillow frame; 3, pillar; 4, slider; 5, block; 6, reset spring; 7, rotating shaft; 11, adjustment column; 12, locking groove; 13, positioning lever; 14, tensioning spring; 20, movable seat; 21, first arc surface; 22, slide groove; 23, guide groove; 24, slide groove side wall; 25, positioning slot; 26, adjustment box; 27, compression spring; 28, worm gear; 29, worm shaft; 291, adjustment handle; 31, Pillow frame matching part; 32, second arc surface; 33, screw hole column; 34, inner column; 35, outer column shell; 36, spring; 37, positioning bead; 38, screw drive sleeve; 341, spring hole; 351, positioning hole; 41, guide matching part; 42, assembly groove cavity; 43, fastening hole; 44, first slot hole; 45, second slot hole; 46, second locking hole; 47, sliding groove; 51, first locking hole; 52, positioning foot; 53, unlocking block. DETAILED DESCRIPTION

[0035] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments, so as to more clearly understand the technical concept to be protected by the present invention.

[0036] like Figures 1 to 3The seat headrest mounting structure of the first embodiment shown comprises a headrest 1, the back of which is hinged to the front side of a pillow frame 2, specifically, the hinge is realized by a rotating shaft 7, and the headrest 1 can be rotated and adjusted to fine-tune and flip a certain angle relative to the pillow frame 2. The rear of the pillow frame 2 is mounted on a pillar 3, and the pillar 3 is fixedly connected to the seat back. A movable seat 20 is arranged at the rear of the pillow frame 2 to cooperate with the pillar 3, a pillow frame matching portion 31 is arranged at the top of the pillar 3, a first curved surface 21 which is recessed upward is arranged at the bottom of the movable seat 20, a second curved surface 32 which is protruding upward is arranged at the top of the pillow frame matching portion 31, the second curved surface 32 is adapted to the first curved surface 21, the first curved surface 21 is supported on the second curved surface 32, pushing and pulling the pillow frame 2 can make the first curved surface 21 slide along the second curved surface 32, the headrest 1 moves with the pillow frame 2, and the headrest 1 will move in the horizontal and vertical directions at the same time, thereby changing the setting angle of the headrest 1 relative to the pillar 3 and changing the front and rear position of the headrest 1 relative to the pillar 3, thereby realizing simultaneous adjustment of the inclination angle and the front and rear position of the headrest 1.

[0037] A slide groove 22 is also provided on the movable seat 20, and the extension direction of the slide groove 22 and the first arc surface 21 is consistent. A screw hole column 33 is provided on the pillow frame matching part 31. A slider 4 is provided in the slide groove 22, and a fastening hole 43 is provided on the slider 4. The fastening hole 43 and the screw hole column 33 are connected by bolts to fix the slider 4 to the pillow frame matching part 31. The movable seat 20 realizes limited movable adjustment through the cooperation of the slide groove 22 and the slider 4.

[0038] A guide groove portion 23 is arranged inside the movable seat 20 corresponding to the slide groove 22, and the slider 4 is provided with a guide matching portion 41 which is slidably matched with the guide groove portion 23. While the slider 4 is fixedly connected to the pillow frame matching portion 31, the movable seat 20 is stably matched with the pillow frame matching portion 31 through the guide matching portion 41, and the pillow frame 2 will not separate from the pillow frame matching portion 31, thereby ensuring the stable sliding of the pillow frame 2.

[0039] A plurality of positioning slots 25 are distributed on the side wall 24 of the guide slot portion 23, and more than three positioning slots 25 are provided. The guide matching portion 41 is provided with an assembly slot cavity 42, and a block 5 is assembled and connected in the assembly slot cavity 42 through a return spring 6. Figure 3As shown, a first slot 44 is provided in the assembly slot 42, a first guide shaft is provided on the block 5 and is connected with the first slot 44 for guiding, a second slot 45 is provided in the assembly slot 42, a second guide shaft is provided on the block 5 corresponding to the second slot 45, the block 5 is clamped in the positioning slot 25 under the tension of the reset spring 6, in the process of pushing and pulling the pillow frame 2, the block 5 is squeezed and pushed to compress the reset spring 6, the block 5 is retracted into the assembly slot 42 and disengaged from the positioning slot 25 under the guidance of the first slot 44 and the second slot 45; a first locking hole 51 is provided on the block 5, and a second locking hole 46 is provided on the assembly slot 42, the block 5 is clamped and matched in the positioning slot 25, the first locking hole 51 and the second locking hole 46 are aligned, and a plug-in locking rod (not shown in the figure) is inserted into the first locking hole 51 and the second locking hole 46, so that the block 5 can be fixed in the assembly slot 42, and the block 5 can be firmly clamped in the positioning slot 25 without disengaging.

[0040] When the pillow frame 2 needs to be adjusted, first pull out the plug-in locking rod from the first locking hole 51 and the second locking hole 46 to release the locking fixation of the block 5, push and pull the pillow frame 2 to apply a force on the block 5 through the positioning slot 25, so that the block 5 can be laterally retracted into the assembly slot 42 along the first slot hole 44 and the second slot hole 45, and the block 5 is disengaged from the positioning slot 25 so that the pillow frame 2 can be slidably adjusted.

[0041] like Figure 1 As shown, the pillow frame 2 is initially set in a horizontal position, and the block 5 is stuck in the middle positioning slot 25. When in use, the person leans forward, as shown in FIG. Figure 4 As shown, the plug-in lock rod is pulled out, and the pillow frame 2 is pulled forward to make the movable seat 20 move on the pillow frame matching part 31, the card block 5 is disengaged from the middle positioning card slot 25, and then is locked in the next positioning card slot 25, and the plug-in lock rod is reinserted to adjust the pillow frame 2 and reposition it. The headrest 1 moves forward in the horizontal direction relative to the support column 3 and moves downward in the vertical direction. In accordance with the change in the position of the person's head leaning forward, the headrest 1 moves forward relative to the initial state and flips downward to adjust the support angle; or when the person leans back in use, as shown in FIG. Figure 5 Shown in Figure 1 In the initial state, the plug-in lock rod is pulled out, and the pillow frame 2 is pushed backward to make the movable seat 20 move on the pillow frame matching part 31. The card block 5 is disengaged from the middle positioning card slot 25 and then stuck in the previous positioning card slot 25. The plug-in lock rod is reinserted to adjust the pillow frame 2 and reposition it. The headrest 1 moves backward in the horizontal direction and upward in the vertical direction relative to the pillar 3. In conjunction with the change in the position of the person's head leaning back, the headrest 1 moves backward relative to the initial state and flips upward to adjust the support angle. Figures 1 to 3 The seat headrest of the first embodiment shown in the figure is more in line with the human-computer interaction usage habits in terms of the tilt angle and the front-rear position adjustment operation of the headrest 1 .

[0042] like Figure 6In the second embodiment shown, positioning slots 25 are symmetrically arranged on the groove side walls 24 on both sides of the guide groove portion 23, and sliding grooves 47 corresponding to the positioning slots 25 on both sides are arranged on the guide matching portion 41. Two clamping blocks 5 are symmetrically slidably arranged in the sliding grooves 47, and a reset spring 6 is connected between the two clamping blocks 5. The clamping block 5 adopts an L-shaped structure, and has a positioning clamping foot 52 and an unlocking block 53. Under the elastic tension of the reset spring 6, the positioning clamping foot 52 is clamped into the positioning slot 25 to lock and fix the pillow frame 2. When pushing and pulling to adjust the pillow frame 2, the unlocking blocks 53 of the two clamping blocks 5 are clamped and pushed to compress the reset spring 6, so that the positioning pins 52 of the two clamping blocks 5 withdraw from the positioning slots 25, and the locking and fixation of the pillow frame 2 by the clamping blocks 5 are released, and the pillow frame 2 can be pushed and pulled to be adjusted; after the pillow frame 2 is adjusted to the right position, the clamping of the unlocking blocks 53 is released, and the two clamping blocks 5 are reset under the elastic force of the reset spring 6 so that the positioning pins 52 are re-engaged in the positioning slots 25, and the pillow frame 2 is locked and fixed.

[0043] Figures 2 to 3 The pillow frame locking and fixing implementation structure of the first embodiment shown in the figure is that the plug-in lock rod is manually pulled out before adjusting the pillow frame 2, and the plug-in lock rod is manually inserted after adjusting the pillow frame 2; Figure 6 The pillow frame locking and fixing implementation structure of the second embodiment shown is that the unlocking block 53 of the two clamping blocks 5 is clamped and squeezed before adjusting the pillow frame 2, and the clamping of the unlocking block 53 is released after adjusting the pillow frame 2. The adjustment operation, locking and fixing, and unlocking operations of the pillow frame 2 are separated and independent.

[0044] like Figure 7 and Figure 8 In the third embodiment shown, a worm gear 28 is provided on the bottom wall of the guide groove portion 23, and a worm shaft 29 is pivotally provided on the guide matching portion 41. The transmission teeth of the worm shaft 29 and the worm gear 28 are matched with each other in transmission. The end of the worm shaft 29 is exposed and extends to the tail end of the pillow frame 2 to be connected with an adjustment handle 291. When adjusting the pillow frame, the adjustment handle 291 is operated to rotate the worm shaft 29, and the pillow frame 2 is pushed and pulled to slide through the transmission of the worm gear 28 and the worm shaft 29. After the adjustment is in place, the worm shaft 29 stops rotating, and the pillow frame 2 is automatically locked and fixed through the meshing of the transmission teeth of the worm shaft 29 and the worm gear 28. The adjustment operation of the pillow frame 2 is more convenient.

[0045] like Fig. 9 In the fourth embodiment shown, the first curved surface 21 is configured to be convex downward, and the second curved surface 32 is configured to be concave downward. The pillow frame 2 is pulled forward to move on the pillow frame matching portion 31, and the headrest 1 moves forward relative to the initial state and flips upward to increase the support angle; the pillow frame 2 is pushed backward to move on the pillow frame matching portion 31, and the headrest 1 moves backward relative to the initial state and flips downward to lower the support angle, thereby realizing simultaneous adjustment of the inclination angle and front and rear position of the headrest 1.

[0046] The headrest 1 is arranged at the front end of the pillow frame 2 in addition to the hinged structure connection in the first embodiment, it can also be arranged as follows Fig.10 As shown, the headrest 1 is installed and connected to the front end of the pillow frame 2 through the front-back moving assembly. When the headrest angle is adjusted to a suitable position and the headrest movement distance is not adjusted accurately, the front-back moving assembly can assist in the front-back movement and adjustment of the headrest 1. The front-back moving assembly includes an adjustment box 26 fixedly arranged at the front end of the pillow frame 2 and an adjustment column 11 arranged at the back of the headrest 1. A compression spring 27 is installed in the adjustment box 26. The adjustment column 11 extends into the adjustment box 26 and abuts against the compression spring 27. Locking grooves 12 are arranged on the surface of the adjustment column 11. A through hole is provided on the surface of the adjustment box 26 and a positioning clamp rod 13 is installed through a tensioning spring 14. The positioning clamp rod 13 is clamped in one of the locking grooves 12 to position and fix the adjustment column 11 to the adjustment box 26.

[0047] During use, the angle of the headrest 1 is adjusted to the right position through the sliding movement of the pillow frame 2. When the moving distance of the headrest 1 does not meet the use requirements, the positioning card rod 13 can be lifted to disengage the positioning card rod 13 from the locking groove 12, and the head can be pushed backward to allow the adjusting column 11 to squeeze the compression spring 27, and then the positioning card rod 13 is released to allow the tensioning spring 14 to reset the positioning card rod 13 so that it is stuck in the corresponding locking groove 12, and the front and rear moving components can assist in the adjustment to move the headrest 1 backward; or the positioning card rod 13 can be lifted to disengage the positioning card rod 13 from the locking groove 12, and the head can be separated from the headrest 1, and the adjusting column 11 can be pushed forward under the tension of the compression spring 27, and then the positioning card rod 13 can be released to allow the tensioning spring 14 to reset the positioning card rod 13 so that it is stuck in the corresponding locking groove 12, and the front and rear moving components can assist in the adjustment to move the headrest 1 forward.

[0048] According to actual needs, the pillar 3 can be set to a lifting structure to facilitate the independent adjustment of the overall height of the headrest 1 and the pillow frame 2. Fig.11 In the lifting and pulling type shown in the figure, an inner column 34 is arranged at the lower part of the pillow frame matching part 31, an outer column shell 35 is arranged outside the inner column 34, a plurality of positioning holes 351 are arranged on the shell wall of the outer column shell 35 in the height direction, a spring hole 341 is arranged on the inner column 34 towards the positioning hole 351, a positioning bead 37 is arranged in the spring hole 341 through a spring 36, and the shape of the positioning bead 37 can be spherical or conical, and the inner column 34 is pulled up and down to position the positioning bead 37 in the positioning hole 351 at different height positions, so as to adjust the lifting and lowering of the pillar 3; or the lifting structure adopts the following method Fig.12 As shown in the rotary lifting, the inner cylinder 34 at the lower part of the pillow frame matching part 31 is provided with an external screw thread, and the top of the outer cylinder shell 35 is provided with an independently rotating screw drive sleeve 38 through a bearing assembly, and the inner wall of the screw drive sleeve 38 is provided with an internal screw thread. The screw threads of the inner cylinder 34 and the screw drive sleeve 38 match and extend into the outer cylinder shell 35. The inner cylinder 34 is raised and lowered by rotating the screw drive sleeve 38 to adjust the overall height of the headrest 1 and the pillow frame 2.

[0049] For those skilled in the art, various other corresponding changes and modifications can be made according to the technical solutions and concepts described above, and all of these changes and modifications should fall within the protection scope of the claims of the utility model.

Claims

1. A seat headrest mounting structure, comprising a support column (3) mounted on a seat back and a headrest frame (2) for mounting a headrest (1), characterized in that: The pillow frame (2) is provided with a first curved surface (21) and a slide groove (22) extending in the same direction as the first curved surface (21); the pillar (3) is provided with a second curved surface (32) supporting the first curved surface (21) and matching the first curved surface (21); the first curved surface (21) slides relative to the second curved surface (32) when the pillow frame (2) is pushed or pulled; and the pillar (3) is provided with a sliding block (4) that cooperates with the slide groove (22) to limit the position.

2. The seat headrest mounting structure according to claim 1, characterized in that: A guide groove portion (23) is provided inside the pillow frame (2) corresponding to the slide groove (22), and the slide block (4) is provided with a guide matching portion (41), and the guide matching portion (41) and the guide groove portion (23) are slidably matched.

3. The seat headrest mounting structure according to claim 2, characterized in that: The groove side wall (24) of the guide groove portion (23) is provided with a plurality of positioning grooves (25); the guide matching portion (41) is assembled with a connecting block (5) via a return spring (6); the block (5) is engaged with the positioning groove (25) under the tension of the return spring (6); the block (5) compresses the return spring (6) and disengages from the positioning groove (25) when being pushed.

4. The seat headrest mounting structure according to claim 3, characterized in that: The positioning slot (25) is arranged on the slot side wall (24) on one side of the guide slot portion (23), and the guide matching portion (41) is provided with an assembly slot cavity (42), in which the block (5) is assembled and connected via the return spring (6).

5. The seat headrest mounting structure according to claim 4, characterized in that: A first slot hole (44) is provided in the assembly slot cavity (42); a first guide shaft is provided on the clamping block (5) and is connected to the first slot hole (44) for guiding; a second slot hole (45) is provided in the assembly slot cavity (42); a second guide shaft is provided on the clamping block (5) corresponding to the second slot hole (45); the clamping block (5) is pushed to compress the return spring (6) and retracts into the assembly slot cavity (42) under the guidance of the first slot hole (44) and the second slot hole (45).

6. The seat headrest mounting structure according to claim 5, characterized in that: The clamping block (5) is provided with a first locking hole (51), and the assembly slot cavity (42) is provided with a second locking hole (46) aligned with the first locking hole (51) when the clamping block (5) is clamped into the positioning clamping slot (25), and plug-in locking rods are inserted into the first locking hole (51) and the second locking hole (46).

7. The seat headrest mounting structure according to claim 3, characterized in that: The positioning slots (25) are symmetrically arranged on the slot side walls (24) on both sides; the guide matching portion (41) is provided with a sliding slot (47); the sliding slot (47) corresponds to the positioning slots (25) on both sides; two clamping blocks (5) are symmetrically slidably arranged in the sliding slots (47); the return spring (6) is connected and arranged between the two clamping blocks (5); the clamping block (5) has a positioning clamping foot (52) that is inserted into the positioning slots (25) and an unlocking block (53) that is used to push and compress the return spring (6).

8. The seat headrest mounting structure according to claim 2, characterized in that: A worm gear tooth (28) is disposed on the bottom wall of the guide groove portion (23); a worm shaft (29) is pivotally disposed on the guide matching portion (41); a transmission tooth of the worm shaft (29) is transmission-matched with the worm gear tooth (28); and an end of the worm shaft (29) is exposed and extends to the rear end of the pillow frame (2) to connect with an adjustment handle (291).

9. The seat headrest mounting structure according to claim 1, characterized in that: The back of the headrest (1) is hinged to the pillow frame (2).

10. The seat headrest mounting structure according to claim 1, characterized in that: An adjustment box (26) is arranged on the front side of the pillow frame (2); an adjustment column (11) extending into the adjustment box (26) is arranged on the back side of the headrest (1); a locking groove (12) is provided on the surface of the adjustment column (11); a positioning lever (13) is arranged on the adjustment box (26); the positioning lever (13) is engaged with any one of the locking grooves (12) to position the adjustment column (11) in the adjustment box (26).

11. The seat headrest mounting structure according to claim 10, characterized in that: A compression spring (27) is arranged in the adjustment box (26) and is in contact with the adjustment column (11).

12. The seat headrest mounting structure according to claim 1, characterized in that: The support column (3) comprises an outer column shell (35), and an inner column body (34) is arranged inside the outer column shell (35) and is movable up and down relative to the outer column shell (35) and is fixed in position.

13. The seat headrest mounting structure according to claim 12, characterized in that: The shell wall of the outer column shell (35) is provided with a plurality of positioning holes (351) in the height direction, the inner column body (34) is provided with a spring hole (341) facing the positioning hole (351), and a positioning bead (37) is provided in the spring hole (341) through a spring (36) and is positioned to match the positioning hole (351).

14. The seat headrest mounting structure according to claim 12, characterized in that: The inner cylinder (34) has an external thread, and the top end of the outer cylinder shell (35) is provided with a screw drive sleeve (38) that cooperates with the thread of the inner cylinder (34) and rotates independently.

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