Waist pillow structure of seat and seat with waist pillow structure

Abstract

The utility model discloses a waist pillow structure of a seat and the seat with the waist pillow structure. The waist pillow structure of the seat comprises a waist pillow support, a waist pillow body and a waist pillow body, the waist pillow main body is arranged on the waist pillow bracket in a turnover manner; the sliding seat is arranged on the waist pillow bracket in a front-back sliding manner; the lifting seat is connected with the sliding seat in a turnover manner; the lifting seat is arranged on the mounting block in an up-down sliding mode, a mounting groove is formed in the seat, the mounting block is suitable for being detachably arranged in the mounting groove of the seat in a matched mode, and the length of the mounting block in the left-right direction is larger than the size height of the mounting block in the up-down direction. The waist pillow structure of the seat has the advantages of being high in applicability, convenient to maintain, comfortable to use and the like.

Description

Technical Field

[0001] The utility model relates to the technical field of seats, in particular to a lumbar pillow structure of a seat and a seat with the lumbar pillow structure. Background Art

[0002] The lumbar pillow structure in the related art needs to have the ability to adjust with multiple degrees of freedom, such as lifting, rearward and backward adjustment, and flipping, in order to ensure the adaptation to the waist of users of different body shapes, so as to ensure the support effect on the waist. In addition, in order to avoid the lumbar pillow structure from shifting and rotating, the lumbar pillow structure needs to be fixed on the seat. The stronger the adjustment ability of the lumbar pillow structure, the better it needs to be fixed. On the one hand, the lumbar pillow structure can only correspond to the seat it is in, and it is difficult for users to choose a different seat structure after selecting the lumbar pillow structure. On the other hand, after the lumbar pillow structure ages, fails, or is accidentally damaged, the user can only replace it together with the seat. Utility Model Content

[0003] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model proposes a lumbar pillow structure for a seat, which has the advantages of strong applicability, convenient maintenance, and comfortable use.

[0004] The utility model also provides a seat with the lumbar pillow structure of the seat.

[0005] To achieve the above-mentioned purpose, according to an embodiment of the first aspect of the utility model, a lumbar pillow structure for a seat is proposed, and the lumbar pillow structure for the seat includes: a lumbar pillow bracket; a lumbar pillow body, which is flippably arranged on the lumbar pillow bracket; a sliding seat, which is slidable forward and backward on the lumbar pillow bracket; a lifting seat, which is flippably connected to the sliding seat; a mounting block, which is slidable up and down on the mounting block, and the seat is provided with a mounting groove, and the mounting block is suitable for being detachably fitted in the mounting groove of the seat, and the left-right length of the mounting block is greater than the height dimension in the up-down direction.

[0006] The lumbar pillow structure of the seat according to the embodiment of the utility model has the advantages of strong applicability, convenient maintenance, and comfortable use.

[0007] In addition, the lumbar pillow structure of the seat according to the above embodiment of the utility model may also have the following additional technical features:

[0008] According to an embodiment of the present invention, the length of the mounting block in the left-right direction is greater than 1.5 times the height of the dimension in the up-down direction.

[0009] According to an embodiment of the present invention, the length of the mounting block is 25-35 centimeters.

[0010] According to one embodiment of the utility model, the lumbar pillow structure of the seat also includes a shift member and an elastic member, the lumbar pillow bracket is provided with a plurality of shift teeth arranged in the front-to-back direction, a tooth groove is formed between two adjacent shift teeth, the shift member is rotatably provided on the sliding seat between an engaged position and a disengaged position, the shift member is suitable for fitting into one of the plurality of tooth grooves in the engaged position, the shift member is disengaged from the tooth groove in the disengaged position, and the elastic member is suitable for driving the shift member to rotate toward the engaged position.

[0011] According to one embodiment of the utility model, two sliding guides are provided on the sliding seat, each of the sliding guides is provided with a guide groove, and a guide rail plate is provided on the lumbar pillow bracket, and guide rails are provided on the two opposite edges of the guide rail plate, and the two guide rails can be slidably engaged in the two guide grooves respectively.

[0012] According to an embodiment of the utility model, a damping head is provided on one of the lifting seat and the sliding seat and a damping seat is provided on the other, damping teeth are provided on the end faces of the damping head and the damping seat, the damping teeth of the damping head and the damping teeth of the damping seat are detachably engaged, and an elastic column suitable for driving the damping seat and the damping head to engage with each other is provided on at least one of the lifting seat and the sliding seat.

[0013] According to one embodiment of the utility model, a damping head groove is provided on the lifting seat, a limiting groove is provided on the end face of the damping head groove, a limiting protrusion is provided on the end face of the damping head, the damping head is fitted in the damping head groove and the limiting protrusion is fitted in the limiting groove, a damping seat groove is provided on the sliding seat, a positioning groove is provided on the circumferential surface of the damping seat groove, a positioning protrusion is provided on the outer circumferential surface of the damping seat, and the positioning protrusion is fitted in the positioning groove.

[0014] According to one embodiment of the utility model, the lumbar pillow structure of the seat also includes a first pair of locking bolts and a second pair of locking bolts, there are two damping head slots, an axial hole is provided between the two damping head slots, there are two damping seat slots, there are two damping heads, two damping seats and two elastic columns, the first pair of locking bolts pass through the two damping heads, the two damping seats, the two elastic columns and the axial hole and are threadedly matched with the second pair of locking bolts.

[0015] According to one embodiment of the utility model, the lumbar pillow structure of the seat also includes a locking bolt and a locking knob, the lifting seat is provided with a through groove extending in the up and down directions and penetrating the thickness direction of the lifting seat, the mounting block is provided with a threaded hole, the locking bolt passes through the through groove, the threaded hole is connected to the locking knob and is threadedly matched with the threaded hole.

[0016] According to an embodiment of the second aspect of the utility model, a seat is provided, wherein the seat comprises the lumbar pillow structure of the seat according to the embodiment of the first aspect of the utility model.

[0017] The seat according to the embodiment of the utility model has the advantages of strong applicability, convenient maintenance, and comfortable use by utilizing the lumbar pillow structure of the seat according to the embodiment of the first aspect of the utility model.

[0018] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0020] Figure 1 It is a structural schematic diagram of a lumbar pillow structure of a seat according to an embodiment of the utility model.

[0021] Figure 2 It is a partial exploded view of the lumbar pillow structure of the seat according to the embodiment of the utility model.

[0022] Figure 3 It is a partial exploded view of the lumbar pillow structure of the seat according to the embodiment of the utility model.

[0023] Figure 4 It is a partial exploded view of the lumbar pillow structure of the seat according to the embodiment of the utility model.

[0024] Figure 5 It is a partial structural schematic diagram of the lumbar pillow structure of a seat according to an embodiment of the utility model.

[0025] Figure numerals: lumbar pillow structure 1 of the seat, lumbar pillow bracket 10, gear tooth 11, tooth groove 12, guide plate 13, guide rail 14, lumbar pillow body 20, sliding seat 30, sliding guide 31, damping head groove 32, limiting groove 33, lifting seat 40, damping seat groove 41, positioning groove 42, axial hole 43, through groove 44, mounting block 50, threaded hole 51, gear member 60, elastic member 70, damping head 80, limiting protrusion 81, damping seat 90, positioning protrusion 91, elastic column 100, first pair of locking bolts 110, second pair of locking bolts 120, gasket 130, locking bolt 140, locking knob 150, decorative cover 160. DETAILED DESCRIPTION

[0026] This application is based on the inventor's discovery and understanding of the following facts and problems:

[0027] The lumbar pillow structure in the related art needs to have the ability to adjust with multiple degrees of freedom, such as lifting and lowering, front and rear adjustment, and flipping, in order to ensure the adaptation to the waist of users of different body shapes, so as to ensure the support effect on the waist. In addition, in order to avoid the lumbar pillow structure from shifting and rotating, the lumbar pillow structure needs to be fixed on the seat. The stronger the adjustment ability of the lumbar pillow structure, the better it needs to be fixed. On the one hand, the lumbar pillow structure can only correspond to the seat it is in, and it is difficult for users to choose a different seat structure after selecting the lumbar pillow structure. On the other hand, after the lumbar pillow structure ages and fails, the user can only replace it together with the seat.

[0028] Specifically, some lumbar pillow structures in the related art can be removed from the seat, but they are simply plugged into the seat through connecting columns, which makes the lumbar pillow structure prone to swinging and tilting, especially swinging and tilting in the left and right directions, which can easily cause uneven force when the user leans on it, causing local muscle strain of the user and affecting the normal function of the cervical and lumbar vertebrae and other bones. For lumbar pillow structures with more degrees of adjustment freedom, it is even more necessary to avoid swinging and tilting at the connection.

[0029] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0030] In the description of the present utility model, it is necessary to understand that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, features defined as "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, unless otherwise specified, "multiple" means two or more.

[0031] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0032] The lumbar pillow structure 1 of a seat according to an embodiment of the present utility model will be described below with reference to the accompanying drawings.

[0033] like Figure 1-Figure 5 As shown, the lumbar pillow structure 1 of the seat according to the embodiment of the utility model includes a lumbar pillow bracket 10, a lumbar pillow body 20, a sliding seat 30, a lifting seat 40 and a mounting block 50.

[0034] The lumbar pillow body 20 is reversibly arranged on the lumbar pillow bracket 10. The sliding seat 30 is slidably arranged on the lumbar pillow bracket 10 (up and down, left and right, and front and back directions are shown by arrows in the figure). The lifting seat 40 is reversibly connected to the sliding seat 30. The lifting seat 40 is slidably arranged on the mounting block 50, and the seat is provided with a mounting groove. The mounting block 50 is suitable for being detachably matched in the mounting groove of the seat, and the length of the mounting block 50 in the left and right direction is greater than the height of the dimension in the up and down direction.

[0035] Specifically, the lumbar pillow structure 1 of the seat can be installed and connected to the seat by installing the mounting block 50 in the mounting groove of the seat. The lumbar pillow body 20 can be turned up and down relative to the lumbar pillow bracket 10, the lumbar pillow bracket 10 can slide forward and backward relative to the sliding seat 30, the sliding seat 30 can rotate relative to the lifting seat 40, and the lifting seat 40 can slide up and down relative to the mounting block 50.

[0036] According to the lumbar pillow structure 1 of the seat in the embodiment of the utility model, the lumbar pillow main body 20 is flipably arranged on the lumbar pillow bracket 10, the sliding seat 30 is slidably arranged on the lumbar pillow bracket 10, the lifting seat 40 is flipably connected to the sliding seat 30, and the lifting seat 40 is slidably arranged on the mounting block 50. Compared with the lumbar pillow structure with only one or two degrees of freedom in the related art, the lumbar pillow main body 20 can be flipped up and down relative to the lumbar pillow bracket 10, the lumbar pillow bracket 10 can slide back and forth relative to the sliding seat 30, the sliding seat 30 can be rotated relative to the lifting seat 40, and the lifting seat 40 can slide up and down relative to the mounting block 50, so that the lumbar pillow main body 20 can have adjustment capabilities in four degrees of freedom, ensuring adaptation to the waist of users of different body shapes and ensuring the supporting effect on the waist of users of different body shapes.

[0037] Furthermore, by providing the mounting block 50, the mounting block 50 can be detachably engaged in the mounting groove of the seat. Compared with a fixedly connected lumbar pillow structure, it can be convenient for disassembly and assembly on the seat. On the one hand, the lumbar pillow structure 1 of the seat can be adapted to different seats, further facilitating adaptation to users of different body shapes. On the other hand, the lumbar pillow structure 1 of the seat can be replaced separately after aging, failure or accidental damage, thereby reducing the maintenance cost of the seat.

[0038] In addition, the length of the mounting block 50 in the left-right direction is greater than the height in the up-down direction, which can improve the stability of the connection between the mounting block 50 and the seat, especially improve the stability of the mounting block 50 in the left-right direction. Compared with the simple plug-in method of the connecting column used in the related art, the lumbar pillow structure 1 of the seat can be prevented from swinging and tilting, and local muscle strain caused by uneven force when the user leans can be prevented, thereby avoiding affecting the normal functions of bones such as the cervical and lumbar vertebrae.

[0039] Therefore, the lumbar pillow structure 1 of the seat can not only realize the adjustment of the lumbar pillow body 20 in multiple degrees of freedom, which is convenient for disassembly and assembly, but also ensure stability while ensuring multiple degrees of freedom adjustment and easy disassembly and assembly, avoiding uneven force when the user leans on it, and improving the comfort of the user when leaning on it.

[0040] Therefore, the lumbar pillow structure 1 of the seat according to the embodiment of the utility model has the advantages of strong applicability, convenient maintenance, and comfortable use.

[0041] The lumbar pillow structure 1 of a seat according to a specific embodiment of the present utility model will be described below with reference to the accompanying drawings.

[0042] In some specific embodiments of the present invention, Figure 1-Figure 5 As shown, the lumbar pillow structure 1 of the seat according to the embodiment of the utility model includes a lumbar pillow bracket 10, a lumbar pillow body 20, a sliding seat 30, a lifting seat 40 and a mounting block 50.

[0043] Advantageously, the left-right length of the mounting block 50 is greater than 1.5 times the height of the vertical dimension, which can further improve the stability of the mounting block 50 in the left-right direction, prevent the lumbar pillow structure 1 of the seat from swinging and tilting in the left-right direction, and improve the uniformity of the force on the user's waist.

[0044] Optionally, the length of the mounting block 50 is 25-35 cm. This can further improve the stability of the mounting block 50 in the left-right direction, prevent the lumbar pillow structure 1 of the seat from swinging and tilting in the left-right direction, and improve the uniformity of the force on the user's waist.

[0045] Specifically, Figure 4 and Figure 5As shown, the lumbar pillow structure 1 of the seat also includes a shifting member 60 and an elastic member 70. The lumbar pillow support 10 is provided with a plurality of shifting teeth 11 arranged in the front-to-back direction, and a tooth groove 12 is formed between two adjacent shifting teeth 11. The shifting member 60 is rotatably arranged on the sliding seat 30 between the engaging position and the disengaging position. The shifting member 60 is suitable for fitting in one of the plurality of tooth grooves 12 at the engaging position, and the shifting member 60 is disengaged from the tooth groove 12 at the disengaging position, and the elastic member 70 is suitable for driving the shifting member 60 to rotate toward the engaging position. Specifically, the shifting member 60 is fitted in the tooth groove 12 under the elastic force of the elastic member 70 to limit the relative sliding of the sliding seat 30 and the lumbar pillow support 10, so that the lumbar pillow body 20 will not slide forward and backward at will when the user leans on it. When the user adjusts the lumbar pillow body 20 forward and backward, the shifting member 60 overcomes the elastic force of the elastic member 70 and disengages from the tooth groove 12, so that the sliding seat 30 and the lumbar pillow support 10 can slide relative to each other. In this way, the relative sliding of the sliding seat 30 and the lumbar pillow bracket 10 can be limited to different gears through the cooperation of the gear member 60 and the tooth groove 12, so that the user can adjust the front and rear position of the lumbar pillow body 20.

[0046] Specifically, the tooth groove 12 can be configured by an inclined angle so that the lumbar pillow body 20 is more suitable for moving forward than moving backward. The stopper 60 is rotatable and relatively slidably arranged on the sliding seat 30 in the length direction of the stopper 60. During the forward sliding process of the lumbar pillow body 20, the shape of the tooth groove 12 enables the stopper 60 to overcome the elastic force of the elastic member 70 and disengage from the tooth groove 12. When sliding to the frontmost position, the stopper 60 is pushed forward by the guide plate 13 to move to a position where rebound is limited. At this time, if the lumbar pillow body 20 is moved backward again, it can return to the rearmost position. The stopper 60 resumes rebound, and the front and rear position of the lumbar pillow body 20 can be adjusted forward again.

[0047] More specifically, Figure 4 and Figure 5 As shown, two sliding guides 31 are provided on the sliding seat 30, each of which is provided with a guide groove, and a guide rail plate 13 is provided on the lumbar pillow bracket 10, and two opposite edges of the guide rail plate 13 are provided with guide rails 14, and the two guide rails 14 are respectively slidably matched in the two guide grooves. In this way, the stability of the lumbar pillow bracket 10 and the sliding seat 30 in sliding forward and backward can be further improved.

[0048] Specifically, the gear teeth 11 and the tooth grooves 12 are formed on the guide rail plate 13. This makes it easier to arrange the gear teeth 11 and the tooth grooves 12.

[0049] Figure 1-Figure 3 The lumbar pillow structure 1 of the seat according to some examples of the utility model is shown. Figure 2 and Figure 3As shown, one of the lifting seat 40 and the sliding seat 30 is provided with a damping head 80 and the other is provided with a damping seat 90, and damping teeth are provided on the end faces of the damping head 80 and the damping seat 90, and the damping teeth of the damping head 80 and the damping teeth of the damping seat 90 can be disengaged and meshed, and at least one of the lifting seat 40 and the sliding seat 30 is provided with an elastic column 100 suitable for driving the damping seat 90 and the damping head 80 to mesh with each other. Specifically, the elastic column 100 can be a thermoplastic polyurethane elastomer. Thus, the damping head 80 and the damping seat 90 are kept meshed under the elastic force of the elastic column 100, and the relative rotation of the damping head 80 and the damping seat 90 is limited, and the angle of the sliding seat 30 and the lifting seat 40 is limited. When adjusting, the elastic force of the elastic column 100 is overcome to disengage the damping teeth, so that the sliding seat 30 and the lifting seat 40 can rotate relative to each other. In this way, the relative rotation angle between the damping head 80 and the damping seat 90 can be limited by the meshing of the damping teeth, thereby facilitating the adjustment of the rotation between the lifting seat 40 and the sliding seat 30 to different angles.

[0050] Specifically, Figure 2 and Figure 3 As shown, the lifting seat 40 is provided with a damping head groove 32, the end surface of the damping head groove 32 is provided with a limiting groove 33, the end surface of the damping head 80 is provided with a limiting protrusion 81, the damping head 80 is matched in the damping head groove 32 and the limiting protrusion 81 is matched in the limiting groove 33, the sliding seat 30 is provided with a damping seat groove 41, the peripheral surface of the damping seat groove 41 is provided with a positioning groove 42, and the outer peripheral surface of the damping seat 90 is provided with a positioning protrusion 91, and the positioning protrusion 91 is matched in the positioning groove 42. In this way, the installation of the damping head 80 and the damping seat 90 can be facilitated, and the rotation of the damping head 80 and the damping seat 90 can also be limited.

[0051] More specifically, Figure 2 and Figure 3 As shown, the lumbar pillow structure 1 of the seat further includes a first pair of locking bolts 110 and a second pair of locking bolts 120, two damping head slots 32, an axial hole 43 is provided between the two damping head slots 32, two damping seat slots 41 are provided, and two damping heads 80, two damping seats 90 and two elastic columns 100 are provided. The first pair of locking bolts 110 pass through the two damping heads 80, two damping seats 90, two elastic columns 100 and the axial hole 43 and are threadedly matched with the second pair of locking bolts 120. Specifically, the two damping heads 80 are arranged opposite to each other, the two damping seats 90 are arranged opposite to each other, and the two elastic columns 100 are arranged opposite to each other. This can further facilitate the installation of the damping heads 80 and the damping seats 90, and the first pair of locking bolts 110 can be used as a rotating shaft to realize the rotation of the sliding seat 30 and the lifting seat 40.

[0052] Specifically, the end faces of the two elastic columns 100 that are away from each other are also provided with gaskets 130. This makes it easier for the first pair of locking bolts 110 and the second pair of locking bolts 120 to lock the damping head 80, the damping seat 90 and the elastic column 100, thereby ensuring the damping positioning effect of the damping head 80 and the damping seat 90.

[0053] Advantageously, if Figure 1 and Figure 2 As shown, the lumbar pillow structure 1 of the seat also includes a locking bolt 140 and a locking knob 150. The lifting seat 40 is provided with a through slot 44 extending in the up-down direction and penetrating the thickness direction of the lifting seat 40. The mounting block 50 is provided with a threaded hole 51. The locking bolt 140 passes through the through slot 44 and the threaded hole 51 and is connected to the locking knob 150 and is threadedly matched with the threaded hole 51. Specifically, a decorative cover 160 suitable for shielding the locking bolt 140 is installed on the locking knob 150. When adjusting the up-down position, the locking knob 150 is turned to loosen the locking bolt 140, so that the lifting seat 40 can move up-down relative to the mounting block 50. After adjustment, the locking knob 150 is tightened to limit the relative movement of the lifting seat 40 and the mounting block 50. In this way, the relative position between the lifting seat 40 and the mounting block 50 in the up-down direction can be adjusted by tightening or loosening the locking knob 150.

[0054] Specifically, the decorative cover 160 is a plastic part that is snap-fitted onto the locking knob 150. The locking knob 150 is a plastic part. The mounting block 50 is a plastic part. The damping head 80 and the damping seat 90 are powder metallurgy parts. The sliding seat 30 is a finely polished aluminum alloy part. The lumbar pillow bracket 10 and the guide plate 13 are plastic parts. The sliding guide 31 is a finely polished aluminum alloy part. The shift member 60 is a polyoxymethylene material part.

[0055] The seat according to the embodiment of the present invention is described below. The seat according to the embodiment of the present invention comprises the lumbar pillow structure 1 of the seat according to the above embodiment of the present invention.

[0056] The seat according to the embodiment of the utility model has the advantages of strong applicability, convenient maintenance, and comfortable use by utilizing the lumbar pillow structure 1 of the seat according to the above embodiment of the utility model.

[0057] Other structures and operations of the seat according to the embodiment of the utility model are known to those skilled in the art and will not be described in detail here.

[0058] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0059] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A lumbar pillow structure for a seat, characterized in that: include: Lumbar pillow support; A lumbar pillow body, which is flippably arranged on the lumbar pillow bracket; A sliding seat, the sliding seat being slidably disposed on the lumbar pillow support; A lifting seat, the lifting seat is connected to the sliding seat in a flippable manner; The lifting seat is slidably mounted on the mounting block, the seat is provided with a mounting groove, the mounting block is adapted to be detachably fitted in the mounting groove of the seat, and the left-right length of the mounting block is greater than the height in the up-down direction.

2. The lumbar pillow structure of a seat according to claim 1, characterized in that: The length of the mounting block in the left-right direction is greater than 1.5 times the height of the vertical dimension.

3. The lumbar pillow structure of a seat according to claim 1, characterized in that: The length of the mounting block is 25-35 cm.

4. The lumbar pillow structure of a seat according to claim 1, characterized in that: It also includes a shift piece and an elastic piece. The lumbar pillow bracket is provided with a plurality of shift teeth arranged in the front-to-back direction, and a tooth groove is formed between two adjacent shift teeth. The shift piece is rotatably provided on the sliding seat between an engaged position and a disengaged position. The shift piece is suitable for fitting into one of the plurality of tooth grooves at the engaged position, and the shift piece is disengaged from the tooth groove at the disengaged position. The elastic piece is suitable for driving the shift piece to rotate toward the engaged position.

5. The lumbar pillow structure of a seat according to claim 1, characterized in that: The sliding seat is provided with two sliding guides, each of which is provided with a guide groove. The lumbar pillow bracket is provided with a guide rail plate, and the two opposite edges of the guide rail plate are provided with guide rails. The two guide rails can be slidably fitted in the two guide grooves respectively.

6. The lumbar pillow structure of a seat according to claim 1, characterized in that: A damping head is provided on one of the lifting seat and the sliding seat, and a damping seat is provided on the other, damping teeth are provided on the end faces of the damping head and the damping seat, the damping teeth of the damping head and the damping teeth of the damping seat are detachably engaged, and an elastic column suitable for driving the damping seat and the damping head to engage with each other is provided on at least one of the lifting seat and the sliding seat.

7. The lumbar pillow structure of a seat according to claim 6, characterized in that: The lifting seat is provided with a damping head groove, the end surface of the damping head groove is provided with a limiting groove, the end surface of the damping head is provided with a limiting protrusion, the damping head is matched in the damping head groove and the limiting protrusion is matched in the limiting groove, the sliding seat is provided with a damping seat groove, the circumferential surface of the damping seat groove is provided with a positioning groove, the outer circumferential surface of the damping seat is provided with a positioning protrusion, and the positioning protrusion is matched in the positioning groove.

8. The lumbar pillow structure of a seat according to claim 7, characterized in that: It also includes a first pair of locking bolts and a second pair of locking bolts, there are two damping head grooves, an axial hole is provided between the two damping head grooves, there are two damping seat grooves, there are two damping heads, two damping seats and two elastic columns, the first pair of locking bolts pass through the two damping heads, two damping seats, two elastic columns and the axial hole and are threadedly matched with the second pair of locking bolts.

9. The lumbar pillow structure of a seat according to claim 1, characterized in that: It also includes a locking bolt and a locking knob. The lifting seat is provided with a through groove extending in the up-down direction and penetrating the thickness direction of the lifting seat. The mounting block is provided with a threaded hole. The locking bolt passes through the through groove. The threaded hole is connected to the locking knob and is threadedly matched with the threaded hole.

10. A seat, characterized in that: A lumbar pillow structure comprising a seat according to any one of claims 1-9.

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