Waist pillow structure and seat

Abstract

The invention discloses a waist pillow structure and a seat. The waist pillow structure comprises a waist pillow assembly and a seat cushion assembly, the first adjusting assembly adjusts the waist pillow assembly to move in the front-back direction, a first adjusting groove and a first locking part are formed in the first adjusting assembly, a first clamping groove is formed in one side wall, in the width direction, of the first adjusting groove, and the first locking part is located in the first clamping groove to lock the first adjusting assembly; the second adjusting assembly adjusts the waist pillow assembly to move in the vertical direction, and the second locking part is located in the second clamping groove to lock the second adjusting assembly. According to the waist pillow structure, the first adjusting groove and the first locking part which can relatively move in the front-back direction and the second adjusting groove and the second locking part which can relatively move in the up-down direction are arranged, so that the adjusting flexibility in the two directions is improved, and the front-back position and the up-down position of the waist pillow can be easily adjusted without leaving a seat; and the use experience is excellent.

Description

Technical Field

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

[0002] Relevant technologies point out that traditional seat lumbar support adjustment requires leaving the seat and adjusting the height before sitting back, which results in a poor user experience during use. In addition, most seats only have up and down adjustment to accommodate people of different heights and weights. People of different heights and weights have different requirements for the degree of lumbar support protrusion. Existing technologies cannot meet the needs of different groups of people and have low comfort. Summary of the invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention is to provide a lumbar pillow structure, which can be easily adjusted in front and back positions and up and down positions without leaving the seat, and has an excellent user experience.

[0004] The present invention also provides a seat with the lumbar pillow structure.

[0005] According to the first aspect of the present invention, the lumbar pillow structure includes: a lumbar pillow assembly; a first adjustment assembly, the first adjustment assembly is connected to the lumbar pillow assembly to adjust the lumbar pillow assembly to move in the front-to-back direction, the first adjustment assembly is formed with a first adjustment slot and a first locking portion, the first locking portion can be relatively movably arranged in the first adjustment slot, the first adjustment slot extends in the front-to-back direction, a side wall of the first adjustment slot in the width direction is formed with a first clamping slot, the first locking portion is located in the first clamping slot to lock the first adjustment assembly; a second adjustment assembly, the second adjustment assembly is connected to the first adjustment assembly to adjust the lumbar pillow assembly to move in the up-and-down direction, the second adjustment assembly is formed with a second adjustment slot and a second locking portion, the second locking portion can be relatively movably arranged in the second adjustment slot, the second adjustment slot extends in the up-and-down direction, a side wall of the first adjustment slot in the width direction is formed with a second clamping slot, and the second locking portion is located in the second clamping slot to lock the second adjustment assembly.

[0006] According to the lumbar pillow structure of the present invention, by providing a first adjustment slot and a first locking portion that can move relatively in the front-to-back direction and a second adjustment slot and a second locking portion that can move relatively in the up-down direction, the adjustment flexibility in two directions is improved, which helps to better match the user's body shape and sitting posture. The front-to-back position and the up-and-down position of the lumbar pillow can be easily adjusted without leaving the seat, and the user experience is excellent. At the same time, the support effect is optimized by combining the principles of ergonomics, the comfort is improved, and the physical discomfort caused by sitting for a long time is reduced.

[0007] In some embodiments, the first adjustment component includes: a first connecting seat, the first connecting seat is connected to the lumbar pillow assembly, the first adjustment groove is formed on the first connecting seat; a second connecting seat, the second connecting seat is slidably matched with the first connecting seat to enable the lumbar pillow assembly to move in the front-to-back direction, the second connecting seat is formed with a first accommodating portion on one side facing the first connecting seat, the second connecting seat is formed with a first guide groove connected to the first accommodating portion, the first guide groove is formed with a first end, a second end and a first bending section connected between the first end and the second end; a first locking member, the first locking member is arranged in the first accommodating portion, the first locking member is formed with a first locking column, one end of the first locking column is arranged in the first adjustment groove, the first locking portion is formed at the one end of the first locking column, and the other end of the first locking column is arranged in the first guide groove, when the first locking member swings left and right relative to the first connecting seat, the first locking column slides between the first end and the first bending section, and when the first locking member moves forward and backward relative to the first connecting seat, the first locking column slides between the second end and the first bending section.

[0008] In some embodiments, the first accommodating portion is formed with a first connecting column, and the first locking member is formed with a first through groove extending along the length direction of the first locking member, the first connecting column is arranged in the first through groove, and when the first locking column slides between the first end and the first bending section, the first locking member rotates around the first connecting column, and when the first locking column slides between the second end and the first bending section, the first connecting column slides in the first through groove.

[0009] In some embodiments, a first switching portion and a second switching portion are respectively formed at both ends of the first adjustment slot, the first switching portion is located at the rear side of the second switching portion, the first locking member contacts the first switching portion to switch the first locking column from the first end to the second end, and the first locking member contacts the second switching portion to switch the first locking column from the second end to the first end.

[0010] In some embodiments, the first locking member is formed with a first sleeve column, and the first sleeve column is formed on one side of the radial direction of the first locking column. The first adjustment assembly also includes: a first elastic member, one end of the first elastic member is sleeved on the first sleeve column, and the other end of the first elastic member abuts against the side wall of the first accommodating portion.

[0011] In some embodiments, the second adjustment assembly includes: a third connection seat, the third connection seat is rotatably connected to the second connection seat, the second adjustment groove is formed on the third connection seat; a fourth connection seat, the fourth connection seat is slidably matched with the third connection seat to enable the lumbar pillow assembly to move in the up and down direction, the fourth connection seat is formed with a second accommodating portion on one side facing the third connection seat, the fourth connection seat is formed with a second guide groove connected to the second accommodating portion, the second guide groove is formed with a third end, a fourth end and a second bending section connected between the third end and the fourth end; a second locking member, the second locking member is arranged in the second accommodating portion, the second locking member is formed with a second locking column, one end of the second locking column is arranged in the second adjustment groove, the second locking portion is formed at the one end of the second locking column, and the other end of the second locking column is arranged in the second guide groove, when the second locking member swings left and right relative to the third connection seat, the second locking column slides between the third end and the second bending section, and when the second locking member moves up and down relative to the third connection seat, the second locking column slides between the fourth end and the second bending section.

[0012] In some embodiments, the second accommodating portion is formed with a second connecting column, and the second locking member is formed with a second through groove extending along the length direction of the second locking member, the second connecting column is arranged in the second through groove, and when the second locking column slides between the third end and the second bending section, the second locking member rotates around the second connecting column, and when the second locking column slides between the fourth end and the second bending section, the second connecting column slides in the second through groove.

[0013] In some embodiments, a third switching portion and a fourth switching portion are respectively formed at both ends of the second adjustment groove, the third switching portion is located at the lower side of the fourth switching portion, the second locking member contacts the third switching portion to switch the second locking column from the third end to the fourth end, and the second locking member contacts the fourth switching portion to switch the second locking column from the fourth end to the third end.

[0014] In some embodiments, the second locking member is formed with a second sleeve column, and the second sleeve column is formed on one side of the radial direction of the second locking column. The second adjustment assembly also includes: a second elastic member, one end of the second elastic member is sleeved on the second sleeve column, and the other end of the second elastic member abuts against the side wall of the second accommodating portion.

[0015] In some embodiments, a first rotating hole is formed on the second connecting seat, a second rotating hole is formed on the third connecting seat, and the second connecting seat and the third connecting seat are rotatably connected by a rotating shaft passing through the first rotating hole and the second rotating hole.

[0016] In some embodiments, a first sliding groove is formed on one of the first connecting seat and the second connecting seat, a first sliding block is formed on the other of the first connecting seat and the second connecting seat, and the first sliding block is slidably disposed in the first sliding groove.

[0017] In some embodiments, the lumbar pillow structure also includes: a fixed plate, a second sliding block is formed on at least one of the fixed plate and the fourth connecting seat, the fixed plate and the fourth connecting seat are connected through the second sliding block, and a second sliding groove is formed on the third connecting seat, and the second sliding block can be slidably disposed in the second sliding groove.

[0018] In some embodiments, the lumbar pillow assembly includes: a limiting assembly, a lumbar pillow body and a lumbar pillow bracket, the lumbar pillow body and the lumbar pillow bracket are rotatably connected via the limiting assembly, the first connecting seat is connected to the lumbar pillow bracket, and the limiting assembly is used to limit the relative position between the lumbar pillow body and the lumbar pillow bracket.

[0019] In some embodiments, a first connecting block is formed on the lumbar pillow body, and the limiting assembly includes: a limiting member, a first limiting portion and a third sleeve column are formed on the limiting member, a second limiting portion is formed on the outer peripheral wall of the first limiting block, and the first limiting portion cooperates with the second limiting portion; a third elastic member, the third elastic member is sleeved on the third sleeve column, one end of the third elastic member abuts against the limiting member, and the other end of the third elastic member abuts against the lumbar pillow support, and the third elastic member always has a force to move the limiting member toward the lumbar pillow body.

[0020] In some embodiments, the first limiting portion is formed as a limiting groove, and the second limiting portion is formed as a plurality of limiting teeth, each of the limiting teeth being suitable for extending into the limiting groove.

[0021] In some embodiments, the first connecting block is formed with a first connecting hole, the first connecting hole protrudes from the first connecting block in the left-right direction, a second connecting hole is formed on the lumbar pillow bracket, the first connecting hole and the second connecting hole are coaxially arranged, and the limiting member also includes a sleeve, which is sleeved in the first connecting hole and the second connecting hole.

[0022] In some embodiments, the lumbar pillow body is provided with the first connecting blocks at both ends in the left and right directions, each of the first connecting blocks is formed with a first connecting hole, and the lumbar pillow bracket is provided with the second connecting holes at both ends in the left and right directions, and the first connecting holes are arranged in a one-to-one correspondence with the second connecting holes.

[0023] In some embodiments, the limiting assembly further includes: a cover body, which extends along the left-right direction and covers the second connecting hole.

[0024] The seat according to the second aspect of the present invention comprises a backrest structure and a lumbar pillow structure according to the first aspect of the present invention, wherein the lumbar pillow structure is connected to the backrest structure via a fixing plate, and the lumbar pillow structure and the backrest structure are relatively movable.

[0025] The seat according to the present invention improves the overall comfort of the seat by providing the lumbar pillow structure of the first aspect, and can better adapt to the needs of different body shapes and sitting postures. The front and rear position and the up and down position of the lumbar pillow can be easily adjusted without leaving the seat, and the user experience is excellent.

[0026] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 is a schematic diagram of a lumbar pillow structure according to an embodiment of the present invention;

[0028] Figure 2 yes Figure 1 An assembly diagram of the first adjustment component of the lumbar pillow structure shown in ;

[0029] Figure 3 yes Figure 2 A schematic diagram of a first connecting seat of a first adjusting assembly shown in ;

[0030] Figure 4 yes Figure 3 A front view schematic diagram of the first connecting socket shown in ;

[0031] Figure 5 yes Figure 2 A schematic diagram of a second connecting seat of the first adjusting assembly shown in ;

[0032] Figure 6 yes Figure 5 A front view schematic diagram of the second connecting socket shown in ;

[0033] Figure 7 yes Figure 2 A schematic diagram of a first stopper of a first adjustment assembly shown in ;

[0034] Figure 8 yes Figure 7 A front view schematic diagram of the first limiting member shown in ;

[0035] Fig. 9 yes Figure 1 An assembly diagram of the second adjustment component of the lumbar pillow structure shown in ;

[0036] Fig.10 yes Fig. 9 A schematic diagram of a third connecting seat of the second adjustment assembly shown in ;

[0037] Fig.11 yes Fig.10 A front view schematic diagram of the third connecting socket shown in ;

[0038] Fig.12 yes Fig. 9 A schematic diagram of a fourth connecting seat of the second adjustment assembly shown in ;

[0039] Fig.13 yes Fig.12 A front view schematic diagram of the fourth connecting socket shown in ;

[0040] Fig.14 yes Fig. 9 A schematic diagram of a second stopper of a second adjustment assembly shown in ;

[0041] Fig.15 yes Fig.14 A front view schematic diagram of the second limiting member shown in ;

[0042] Fig.16 yes Fig. 9 A schematic diagram of a lumbar pillow assembly shown in ;

[0043] Fig.17 yes Fig.16 Schematic diagram of the limiter shown in FIG.

[0044] Reference numerals:

[0045] 100. Lumbar pillow structure;

[0046] 1. A first adjustment component;

[0047] 11. first connecting seat; 111. first adjusting slot; 1111. first switching part; 1112. second switching part;

[0048] 112. First card slot;

[0049] 12. second connecting seat; 121. first accommodating portion; 1211. first connecting column;

[0050] 122, first guide groove; 1221, first end; 1222, second end; 1223, first bending section;

[0051] 123. a first rotating hole; 124. a first abutting groove;

[0052] 13. First locking member; 131. First locking column; 1311. First locking portion;

[0053] 132. a first through groove; 133. a first set of columns;

[0054] 14. a first elastic member;

[0055] 2. A second adjustment component;

[0056] 21, third connecting seat; 211, second adjusting slot; 2111, third switching part; 2112, fourth switching part;

[0057] 212, second card slot; 213, second rotating hole;

[0058] 22, fourth connecting seat; 221, second accommodating portion; 2211, second connecting column;

[0059] 222, second guide groove; 2221, third end; 2222, fourth end; 2223, second bending section;

[0060] 223, second abutment groove;

[0061] 23. second locking member; 231. second locking column; 2311. second locking portion;

[0062] 232, second through groove; 233, second set of columns; 24, second elastic member;

[0063] 3. Lumbar pillow assembly;

[0064] 31. lumbar pillow body; 311. first connecting hole; 312. limiting tooth;

[0065] 32. Lumbar pillow support; 322. Second connecting hole;

[0066] 33. Limiting assembly; 331. Limiting member; 3311. Limiting groove; 3312. Third set of columns;

[0067] 332, third elastic member; 333, shaft sleeve; 334, cover body;

[0068] 4. Rotating shaft; 5. Fixed plate;

[0069] 6. First sliding groove; 7. First sliding block;

[0070] 8. The second sliding groove; 9. The second sliding block. DETAILED DESCRIPTION

[0071] Embodiments of the present invention are described in detail below, examples of which 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 intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0072] First, a sitting tool according to an embodiment of the second aspect of the present invention is briefly described. The sitting tool includes a lumbar pillow structure 100 according to an embodiment of the first aspect of the present invention.

[0073] The seat according to the embodiment of the present invention comprises: a backrest structure and a lumbar pillow structure 100 according to the first embodiment of the present invention.

[0074] like Figure 1 , Figure 2 and Fig. 9 As shown, the lumbar pillow structure 100 has a fixing plate 5, and the lumbar pillow structure 100 is connected to the backrest structure through the fixing plate 5, and the lumbar pillow structure 100 and the backrest structure can move relatively. That is, the lumbar pillow structure 100 and the backrest structure can rotate relatively, or the lumbar pillow structure 100 and the backrest structure can move relatively in the front-to-back direction, or the lumbar pillow structure 100 and the backrest structure can move relatively in the up-down direction, or the lumbar pillow structure 100 and the backrest structure can move relatively in the front-to-back direction or in the up-down direction on the basis of relative rotation, or the lumbar pillow structure 100 and the backrest structure can move relatively in the front-to-back direction and in the up-down direction on the basis of relative rotation.

[0075] Reference below Figure 1-Figure 15 A lumbar pillow structure 100 according to an embodiment of a first aspect of the present invention is described.

[0076] like Figure 1-Figure 15 As shown, the lumbar pillow structure 100 according to the first embodiment of the present invention includes: a lumbar pillow component 3, a first adjustment component 1 and a second adjustment component 2.

[0077] Specifically, the first adjustment component 1 is connected to the lumbar pillow component 3 to adjust the lumbar pillow component 3 to move in the front-to-back direction. The first adjustment component 1 is formed with a first adjustment slot 111 and a first locking portion 1311. The first locking portion 1311 can be relatively movably arranged in the first adjustment slot 111. The first adjustment slot 111 extends in the front-to-back direction. A side wall in the width direction of the first adjustment slot 111 is formed with a plurality of first card slots 112. The plurality of first card slots 112 are adjacently arranged in the front-to-back direction. The first locking portion 1311 is located in one of the first card slots 112 to lock the first adjustment component 1. The second adjustment component 2 is connected to the first adjustment component 1 to adjust the lumbar pillow component 3 to move in the up and down directions. The second adjustment component 2 is formed with a second adjustment groove 211 and a second locking portion 2311. The second locking portion 2311 can be relatively movably arranged in the second adjustment groove 211. The second adjustment groove 211 extends in the up and down directions. A side wall in the width direction of the first adjustment groove 111 is formed with a plurality of second card slots 212. The plurality of second card slots 212 are arranged adjacent to each other in the up and down directions. The second locking portion 2311 is located in one of the second card slots 212 to lock the second adjustment component 2.

[0078] It can be understood that the lumbar pillow assembly 3 contacts the user's waist to provide support for the user's waist, the first adjustment slot 111 extends in the front-to-back direction, the first locking portion 1311 is slidable in the first adjustment slot 111, and the current position is locked or unlocked by entering or exiting the first card slot 112, the first card slot 112 is adjacently arranged in the front-to-back direction to form a plurality of adjustment gears of the lumbar pillow structure 100, when the first locking portion 1311 is located in the first card slot 112, the lumbar pillow assembly 3 is fixed in the current position to prevent it from continuing to move forward and backward, the second adjustment slot 211 extends in the up-down direction, the second locking portion 2311 is slidable in the second adjustment slot 211, and the position is locked or released by entering or exiting the second card slot 212, the second card slot 212 is adjacently arranged in the up-to-down direction to form a plurality of adjustment gears of the lumbar pillow structure 100, when the second locking portion 2311 is located in the second card slot 212, the lumbar pillow assembly 3 is locked at the current height position. This allows the user to precisely adjust the position of the lumbar pillow according to their needs without leaving their seat.

[0079] In short, through a simple mechanical limit mechanism, it can be ensured that the lumbar pillow will not move easily once the position is set, thereby maintaining stability and comfort for long-term use. Moreover, the front and back position and up and down position of the lumbar pillow can be easily adjusted without leaving the seat, providing an excellent user experience.

[0080] The lumbar pillow structure 100 according to the embodiment of the present invention improves the adjustment flexibility in two directions by providing a first adjustment slot 111 and a first locking portion 1311 which can be relatively moved in the front-to-back direction and a second adjustment slot 211 and a second locking portion 2311 which can be relatively moved in the up-down direction, which helps to better match the user's body shape and sitting posture. The front-to-back position and the up-and-down position of the lumbar pillow can be easily adjusted without leaving the seat, which provides an excellent user experience. At the same time, the ergonomic principles are combined to optimize the support effect, improve comfort, and reduce physical discomfort caused by sitting for a long time.

[0081] In some embodiments of the present invention, Figure 2-Figure 8 As shown, the first adjustment assembly 1 includes: a first connecting seat 11, a second connecting seat 12 and a first locking member 13. The first connecting seat 11 is connected to the lumbar pillow assembly 3. A first adjustment groove 111 is formed on the first connecting seat 11. The second connecting seat 12 is slidably matched with the first connecting seat 11 to enable the lumbar pillow assembly 3 to move in the front-to-back direction. A first accommodating portion 121 is formed on the side of the second connecting seat 12 facing the first connecting seat 11. The second connecting seat 12 is formed with a first guide groove 122 communicating with the first accommodating portion 121, as shown in FIG. Figure 6 As shown, the first guide groove 122 is formed with a first end 1221, a second end 1222 and a first bending section 1223 connected between the first end 1221 and the second end 1222, the first locking member 13 is arranged in the first accommodating portion 121, the first locking member 13 is formed with a first locking column 131, one end of the first locking column 131 is arranged in the first adjusting groove 111, the first locking portion 1311 is formed at one end of the first locking column 131, and the other end of the first locking column 131 is arranged in the first guide groove 122, when the first locking member 13 swings left and right relative to the first connecting seat 11, the first locking column 131 slides between the first end 1221 and the first bending section 1223, and when the first locking member 13 moves forward and backward relative to the first connecting seat 11, the first locking column 131 slides between the second end 1222 and the first bending section 1223.

[0082] It can be understood that the first connecting seat 11 is directly connected to the lumbar pillow assembly 3, and a first adjusting groove 111 is formed on the first connecting seat 11. The first card slot 112 extends obliquely toward the position where the lumbar pillow assembly 3 is located in the width direction of the first adjusting groove 111, and the multiple first card slots 112 are all arc transitions. The second connecting seat 12 and the first connecting seat 11 are slidably matched to enable the lumbar pillow assembly 3 to move in the front and rear directions. The first locking member 13 is arranged in the first accommodating portion 121, and the first guide groove 122 is connected to the first accommodating portion 121. One end of the first locking column 131 is located in the first adjusting groove 111 of the first connecting seat 11, and the other end of the first locking column 131 is located in the first guide groove 122 of the second connecting seat 12. The first locking portion 1311 is formed at one end of the first locking column 131 (such as Figure 2 When the upper end of the first locking column 131 is located in the first slot 112, the lumbar pillow assembly 3 is locked in the current position. When the first locking member 13 swings left and right relative to the first connecting seat 11, the first locking column 131 slides between the first end 1221 of the first guide groove 122 and the first bending section 1223. When the first locking member 13 moves forward and backward relative to the first connecting seat 11, the first locking column 131 slides between the second end 1222 of the first guide groove 122 and the first bending section 1223. In this way, the position of the lumbar pillow assembly 3 is finely adjusted and locked, the difficulty of adjustment is reduced, the lumbar pillow structure 100 is overall reliable and safe, and the user experience is improved.

[0083] Furthermore, if Figure 5 and Figure 6 As shown, the first accommodating portion 121 is formed with a first connecting column 1211, and the first locking member 13 is formed with a first through groove 132 extending along the length direction of the first locking member 13, and the first connecting column 1211 is arranged in the first through groove 132. When the first locking column 131 slides between the first end 1221 and the first bending section 1223, the first locking member 13 rotates around the first connecting column 1211, and when the first locking column 131 slides between the second end 1222 and the first bending section 1223, the first connecting column 1211 slides in the first through groove 132. It can be understood that when the first locking column 131 slides between the first end 1221 and the first bending section 1223, the first locking member 13 reciprocates around the first connecting column 1211. At this time, the first locking column 131 moves in and out of the first card slot 112 to lock or unlock the first adjustment component 1; when the first locking column 131 slides between the second end 1222 and the first bending section 1223, the first locking member 13 slides in the front-to-back direction relative to the first connecting column 1211. At this time, the first locking column 131 is always in the first adjustment slot 111 and cannot enter the first card slot 112. In this way, the stability and accuracy of the adjustment process are ensured, and the user can easily adjust and lock the position of the lumbar pillow according to personal needs.

[0084] Furthermore, if Figure 3 and Figure 4As shown, a first switching portion 1111 and a second switching portion 1112 are respectively formed at both ends of the first adjustment groove 111, the first switching portion 1111 is located at the rear side of the second switching portion 1112, the first locking member 13 contacts the first switching portion 1111 to switch the first locking column 131 from the first end 1221 to the second end 1222, and the first locking member 13 contacts the second switching portion 1112 to switch the first locking column 131 from the second end 1222 to the first end 1221. When the first locking member 13 contacts the first switching portion 1111, the first locking column 131 moves from the first end 1221 to the second end 1222 through the first bending section 1223. At this time, the first locking column 131 withdraws from the first card slot 112 at the front end and is always located in the first adjustment slot 111, unlocking the first adjustment component 1, and the first connecting seat 11 moves relative to the second connecting seat 12 in the front-to-back direction, from the front end to the rear end of the first connecting seat 11; when moving to the rear end of the first connecting seat 11, the first locking member 13 contacts the second switching portion 1112, and the first locking column 131 enters the first end 1221 from the second end 1222 through the first bending section 1223. At this time, the first locking column 131 enters from the first adjustment slot 111 into the first card slot 112 at the rear end, locking the first adjustment component 1 again. In this way, it is ensured that the user can easily adjust the position of the lumbar pillow without leaving the seat, and a reliable locking function is also provided to maintain the adjusted state.

[0085] It can be understood that the first switching portion 1111 is an end surface at the front end of the first adjustment slot 111 , and the second switching portion 1112 is an end surface at the rear end of the first adjustment slot 111 .

[0086] Furthermore, if Figure 7 and Figure 8 As shown, the first locking member 13 is formed with a first sleeve column 133, and the first sleeve column 133 is formed on one side of the radial direction of the first locking column 131. The first adjustment assembly 1 also includes: a first elastic member 14, one end of the first elastic member 14 is sleeved on the first sleeve column 133, and the other end of the first elastic member 14 abuts against the side wall of the first accommodating portion 121. The first elastic member 14 always has a force to move the first locking column 131 toward the first card slot 112. It can be understood that when the first locking column 131 withdraws from the first card slot 112, the first elastic member 14 is compressed and has a force to push the first locking column 131 into the first card slot 112. When the first locking column 131 enters the first card slot 112, the first elastic member 14 has a force to keep the first locking column 131 in the current position. Therefore, not only the user's operation process is simplified, but also the reliability and comfort of the lumbar pillow structure 100 are improved, ensuring that the lumbar pillow assembly 3 can be firmly maintained in the desired position in the non-operating state.

[0087] like Figure 5 and Figure 6 As shown, a first abutting groove 124 is formed on the peripheral wall of the first accommodation portion 121 , and the other end of the first elastic member 14 extends into the first abutting groove 124 and abuts against the side wall of the first abutting groove 124 .

[0088] In some embodiments of the present invention, Fig. 9 and Fig.15 As shown, the second adjustment component 2 includes: a third connecting seat 21, a fourth connecting seat 22 and a second locking member 23, the third connecting seat 21 is rotatably connected to the second connecting seat 12, a second adjustment groove 211 is formed on the third connecting seat 21, the fourth connecting seat 22 is slidably matched with the third connecting seat 21 to enable the lumbar pillow component 3 to move in the up and down directions, a second accommodating portion 221 is formed on the side of the fourth connecting seat 22 facing the third connecting seat 21, the fourth connecting seat 22 is formed with a second guide groove 222 connected to the second accommodating portion 221, the second guide groove 222 is formed with a third end 2221, a fourth end 2222 and a third end 2221 and a fourth end 2222 connected between the third end 2221 and the fourth end 2222 The second locking member 23 is arranged in the second accommodating portion 221, and the second locking member 23 is formed with a second locking column 231. One end of the second locking column 231 is arranged in the second adjusting groove 211. The second locking portion 2311 is formed at one end of the second locking column 231, and the other end of the second locking column 231 is arranged in the second guide groove 222. When the second locking member 23 swings left and right relative to the third connecting seat 21, the second locking column 231 slides between the third end 2221 and the second bending segment 2223. When the second locking member 23 moves up and down relative to the third connecting seat 21, the second locking column 231 slides between the fourth end 2222 and the second bending segment 2223.

[0089] It can be understood that the third connecting seat 21 is rotatably connected to the second connecting seat 12, and a second adjusting groove 211 is formed on the third connecting seat 21. The second card slot 212 extends obliquely toward the position where the first adjusting component 1 is located in the width direction of the first adjusting groove 111, and the plurality of second card slots 212 have arc transitions. The fourth connecting seat 22 and the third connecting seat 21 are slidably matched to enable the lumbar pillow assembly 3 to move in the up and down directions. The second locking member 23 is disposed in the second accommodating portion 221, and the second guide groove 222 is connected to the second accommodating portion 221. One end of the second locking column 231 is located in the second adjusting groove 211 of the third connecting seat 21, and the other end of the second locking column 231 is located in the second guide groove 222 of the fourth connecting seat 22. The second locking portion 2311 is formed at one end of the second locking column 231 (such as Fig. 9When the front end of the second locking column 231 is located in the second slot 212, the lumbar pillow assembly 3 is locked in the current position. When the second locking member 23 swings left and right relative to the third connecting seat 21, the second locking column 231 slides between the third end 2221 of the second guide slot 222 and the second bending section 2223. When the second locking member 23 moves up and down relative to the third connecting seat 21, the second locking column 231 slides between the fourth end 2222 of the second guide slot 222 and the second bending section 2223. In this way, the position of the lumbar pillow assembly 3 is finely adjusted and locked, the difficulty of adjustment is reduced, the lumbar pillow structure 100 is overall reliable and safe, and the user experience is improved.

[0090] Furthermore, if Fig.12 and Fig.13 As shown, the second accommodating portion 221 is formed with a second connecting column 2211, and the second locking member 23 is formed with a second through groove 232 extending along the length direction of the second locking member 23, and the second connecting column 2211 is arranged in the second through groove 232. When the second locking column 231 slides between the third end 2221 and the second bending section 2223, the second locking member 23 rotates around the second connecting column 2211, and when the second locking column 231 slides between the fourth end 2222 and the second bending section 2223, the second connecting column 2211 slides in the second through groove 232. It can be understood that when the second locking column 231 slides between the third end 2221 and the second bending section 2223, the second locking member 23 reciprocates around the second connecting column 2211. At this time, the second locking column 231 moves in and out of the second card slot 212 to lock or unlock the second adjustment component 2; when the second locking column 231 slides between the fourth end 2222 and the second bending section 2223, the second locking member 23 slides in the up and down direction relative to the second connecting column 2211. At this time, the second locking column 231 is always in the second adjustment slot 211 and cannot enter the second card slot 212. In this way, the stability and accuracy of the adjustment process are ensured, and the user can easily adjust and lock the position of the lumbar pillow according to personal needs.

[0091] Furthermore, if Fig.10 and Fig.11As shown, a third switching portion 2111 and a fourth switching portion 2112 are respectively formed at both ends of the second adjustment groove 211, the third switching portion 2111 is located at the lower side of the fourth switching portion 2112, the second locking member 23 contacts the third switching portion 2111 so that the second locking column 231 switches from the third end 2221 to the fourth end 2222, and the second locking member 23 contacts the fourth switching portion 2112 so that the second locking column 231 switches from the fourth end 2222 to the third end 2221. When the second locking member 23 contacts the third switching portion 2111, the second locking column 231 moves from the third end 2221 through the second bending section 2223 to the fourth end 2222. At this time, the second locking column 231 withdraws from the second card slot 212 at the top and is always located in the second adjustment slot 211, unlocking the second adjustment assembly 2, and the third connection seat 21 moves in the up-down direction relative to the fourth connection seat 22, from the upper end to the lower end of the third connection seat 21; when moving to the lower end of the third connection seat 21, the second locking member 23 contacts the fourth switching portion 2112, and the second locking column 231 enters the second end 1222 from the fourth end 2222 through the second bending section 2223. At this time, the second locking column 231 enters the second card slot 212 at the bottom from the second adjustment slot 211, and locks the second adjustment assembly 2 again. In this way, it is ensured that the user can easily adjust the position of the lumbar pillow without leaving the seat, and a reliable locking function is also provided to maintain the adjusted state.

[0092] It can be understood that the third switching portion 2111 is an end surface of an upper end of the second adjusting groove 211 , and the fourth switching portion 2112 is an end surface of a lower end of the second adjusting groove 211 .

[0093] Furthermore, if Fig.14 and Fig.15 As shown, the second locking member 23 is formed with a second sleeve column 233, and the second sleeve column 233 is formed on one side of the second locking column 231 in the radial direction. The second adjustment assembly 2 also includes: a second elastic member 24, one end of the second elastic member 24 is sleeved on the second sleeve column 233, and the other end of the second elastic member 24 abuts against the side wall of the second accommodating portion 221, and the second elastic member 24 always has a force to move the second locking column 231 toward the second card slot 212. It can be understood that when the second locking column 231 withdraws from the second card slot 212, the second elastic member 24 is compressed and has a force to push the second locking column 231 into the second card slot 212. When the second locking column 231 enters the second card slot 212, the second elastic member 24 has a force to keep the second locking column 231 in the current position. As a result, not only the user's operation process is simplified, but also the reliability and comfort of the lumbar pillow structure 100 are improved, ensuring that the lumbar pillow assembly 3 can be firmly maintained in the desired position in the non-operating state.

[0094] like Fig.12 and Fig.13 As shown, a second abutting groove 223 is formed on the peripheral wall of the second accommodation portion 221 , and the other end of the second elastic member 24 extends into the second abutting groove 223 and abuts against the side wall of the second abutting groove 223 .

[0095] In some embodiments of the present invention, Figure 5 and Fig.10 As shown, a first rotating hole 123 is formed on the second connecting seat 12, and a second rotating hole 213 is formed on the third connecting seat 21. The second connecting seat 12 and the third connecting seat 21 are rotatably connected by the rotating shaft 4 penetrating the first rotating hole 123 and the second rotating hole 213. In other words, by penetrating the rotating shaft 4 into the first rotating hole 123 and the second rotating hole 213, the second connecting seat 12 and the third connecting seat 21 can rotate relative to each other, and the lumbar pillow assembly 3 can not only adjust the position in the front-back and up-down directions through the first adjusting assembly 1 and the second adjusting assembly 2, but also adjust the tilt angle to adapt to different sitting posture requirements, which not only provides multi-dimensional adjustment possibilities, but also ensures stability and accuracy during the adjustment process.

[0096] In some embodiments of the present invention, a first sliding groove 6 is formed on one of the first connecting seat 11 and the second connecting seat 12, and a first sliding block 7 is formed on the other of the first connecting seat 11 and the second connecting seat 12, and the first sliding block 7 is slidably disposed in the first sliding groove 6. Thus, by combining the mechanical structure of the sliding groove and the sliding block, the sliding stability between the first connecting seat 11 and the second connecting seat 12 is ensured, the user can easily adjust the position of the lumbar pillow without leaving the seat, and can provide the best support under different body shapes and sitting posture requirements.

[0097] In some embodiments of the present invention, the lumbar pillow structure 100 further includes: a fixing plate 5, a second sliding block 9 is formed on at least one of the fixing plate 5 and the fourth connecting seat 22, the fixing plate 5 and the fourth connecting seat 22 are connected through the second sliding block 9, a second sliding groove 8 is formed on the third connecting seat 21, and the second sliding block 9 is slidably disposed in the second sliding groove 8. Thus, the sliding stability between the third connecting seat 21 and the fourth connecting seat 22 is ensured, and the user can easily adjust the position of the lumbar pillow without leaving the seat.

[0098] In some embodiments of the present invention, Fig. 9 , Fig.16 and Fig.17As shown, the lumbar pillow assembly 3 includes: a limiting assembly 33, a lumbar pillow body 31 and a lumbar pillow bracket 32. The lumbar pillow body 31 and the lumbar pillow bracket 32 ​​are rotatably connected through the limiting assembly 33. The first connecting seat 11 is connected to the lumbar pillow bracket 32. The limiting assembly 33 is used to limit the relative position between the lumbar pillow body 31 and the lumbar pillow bracket 32. As a result, the flexibility of the lumbar pillow assembly 3 is further increased, so that it can better adapt to the user's waist curve and sitting posture changes, improve the comfort of the seat, and enhance the user experience.

[0099] In some embodiments of the present invention, a first connecting block is formed on the lumbar pillow body 31, and the limiting assembly 33 includes: a limiting member 331, a first limiting portion and a third sleeve column 3312 are formed on the limiting member 331, a second limiting portion is formed on the outer peripheral wall of the first limiting block, and the first limiting portion cooperates with the second limiting portion; a third elastic member 332, the third elastic member 332 is sleeved on the third sleeve column 3312, one end of the third elastic member 332 abuts against the limiting member 331, and the other end of the third elastic member 332 abuts against the lumbar pillow bracket 32, and the third elastic member 332 always has a force to move the limiting member 331 toward the lumbar pillow body 31. It can be understood that the third elastic member 332 provides a preload force to help maintain the stability of the two ends of the third elastic member 332 abutting against the limiting member 331 and the lumbar pillow bracket 32 ​​respectively. In this way, not only the comfort of the seat is improved, but also the needs of different body shapes and sitting postures can be better adapted.

[0100] In some embodiments of the present invention, Fig.16 and Fig.17 As shown, the first limiting portion is formed as a limiting groove 3311, and the second limiting portion is formed as a plurality of limiting teeth 312, and each limiting tooth 312 is adapted to extend into the limiting groove 3311. In other words, if the user needs to adjust the angle of the lumbar pillow body 31, a certain force can be applied to overcome the pre-tightening force of the third elastic member 332, so that the limiting teeth 312 can be disengaged from the limiting groove 3311. The limiting groove 3311 and the limiting teeth 312 ensure stable locking at multiple preset angles, avoid instability caused by excessive rotation, and realize multi-gear adjustment of the lumbar pillow assembly 3.

[0101] In some embodiments of the present invention, Fig.16 As shown, the first connection block is formed with a first connection hole 311, the first connection hole 311 protrudes from the first connection block in the left-right direction, the lumbar pillow bracket 32 ​​is formed with a second connection hole 322, the first connection hole 311 and the second connection hole 322 are coaxially arranged, and the stopper 331 further includes a shaft sleeve 333, which is sleeved in the first connection hole 311 and the second connection hole 322. Thus, the shaft sleeve 333 ensures smooth rotation between the lumbar pillow body 31 and the lumbar pillow bracket 32, reduces friction, and improves the smoothness and reliability of relative rotation.

[0102] In some embodiments of the present invention, both ends of the lumbar pillow body 31 in the left-right direction are provided with first connection blocks, each of which is formed with a first connection hole 311, and both ends of the lumbar pillow bracket 32 ​​in the left-right direction are provided with second connection holes 322, and the first connection holes 311 are arranged in a one-to-one correspondence with the second connection holes 322. Thus, the stability and reliability of the connection are ensured, the instability and wear that may be caused by a single-point connection are avoided, and it is ensured that the lumbar pillow assembly 3 can be firmly maintained in the desired position in the non-operating state.

[0103] In some embodiments of the present invention, Fig.16 As shown, the limiting assembly 33 further includes a cover 334, which extends in the left-right direction and covers the second connection hole 322. Thus, the cover 334 can prevent dust, debris, etc. from entering the connection hole, prolonging the service life, and the cover 334 improves the aesthetics and safety of the overall structure.

[0104] Optionally, the first elastic member 14 and the second elastic member 24 are both springs, the wire diameter of the spring is 0.7 mm, the length of the spring is 15 mm, and the outer diameter of the spring is 5 mm.

[0105] Optionally, the first connecting seat 11 , the second connecting seat 12 , the third connecting seat 21 and the fourth connecting seat 22 are all plastic parts, and the first limiting member and the second limiting member are both aluminum alloy parts.

[0106] The sitting furniture according to the second embodiment of the present invention comprises the lumbar pillow structure 100 according to the first embodiment of the present invention.

[0107] Specifically, the lumbar pillow structure 100 has a fixing plate 5, and the lumbar pillow structure 100 is connected to the backrest structure through the fixing plate 5, and the lumbar pillow structure 100 and the backrest structure can move relatively. That is, the lumbar pillow structure 100 and the backrest structure can rotate relatively, or the lumbar pillow structure 100 and the backrest structure can move relatively in the front-to-back direction, or the lumbar pillow structure 100 and the backrest structure can move relatively in the up-down direction, or the lumbar pillow structure 100 and the backrest structure can move relatively in the front-to-back direction or in the up-down direction on the basis of relative rotation, or the lumbar pillow structure 100 and the backrest structure can move relatively in the front-to-back direction and in the up-down direction on the basis of relative rotation.

[0108] The seat according to the embodiment of the present invention is provided with the lumbar pillow structure 100 of the first embodiment, so that the overall comfort of the seat is improved, and the needs of different body shapes and sitting postures can be better adapted. The front and rear position and the up and down position of the lumbar pillow can be easily adjusted without leaving the seat, and the user experience is excellent.

[0109] In the description of the present invention, it is to be understood 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”, etc., indicating orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0110] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0111] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like 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, an electrical connection, or a communication; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0112] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. 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 present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0113] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art 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, characterized in that: include: Lumbar pillow assembly; A first adjustment component, the first adjustment component is connected to the lumbar pillow component to adjust the lumbar pillow component to move in the front-to-back direction, the first adjustment component is formed with a first adjustment slot and a first locking portion, the first locking portion is relatively movably arranged in the first adjustment slot, the first adjustment slot extends in the front-to-back direction, a side wall in the width direction of the first adjustment slot is formed with a plurality of first clamping slots, the plurality of first clamping slots are adjacently arranged in the front-to-back direction, and the first locking portion is located in one of the first clamping slots to lock the first adjustment component; A second adjustment component, the second adjustment component is connected to the first adjustment component to adjust the lumbar pillow component to move in the up and down direction, the second adjustment component is formed with a second adjustment slot and a second locking portion, the second locking portion can be relatively movably arranged in the second adjustment slot, the second adjustment slot extends in the up and down direction, a side wall in the width direction of the first adjustment slot is formed with a plurality of second card slots, the plurality of second card slots are adjacently arranged in the up and down direction, the second locking portion is located in one of the second card slots to lock the second adjustment component.

2. The lumbar pillow structure according to claim 1, characterized in that: The first adjustment component comprises: A first connecting seat, the first connecting seat is connected to the lumbar pillow assembly, and the first adjusting slot is formed on the first connecting seat; a second connecting seat, the second connecting seat slidably cooperates with the first connecting seat to enable the lumbar pillow assembly to move in the front-to-back direction, the second connecting seat is formed with a first accommodation portion on one side facing the first connecting seat, the second connecting seat is formed with a first guide groove communicating with the first accommodation portion, the first guide groove is formed with a first end, a second end and a first bending section connected between the first end and the second end; A first locking member, the first locking member is arranged in the first accommodating portion, the first locking member is formed with a first locking column, one end of the first locking column is arranged in the first adjusting groove, the first locking portion is formed at the one end of the first locking column, the other end of the first locking column is arranged in the first guide groove, when the first locking member swings left and right relative to the first connecting seat, the first locking column slides between the first end and the first bending section, and when the first locking member moves forward and backward relative to the first connecting seat, the first locking column slides between the second end and the first bending section.

3. The lumbar pillow structure according to claim 2, characterized in that: The first accommodating portion forms a first connecting column, and the first locking member forms a first through groove extending along the length direction of the first locking member. The first connecting column is arranged in the first through groove. When the first locking column slides between the first end and the first bending section, the first locking member rotates around the first connecting column. When the first locking column slides between the second end and the first bending section, the first connecting column slides in the first through groove.

4. The lumbar pillow structure according to claim 3, characterized in that: A first switching portion and a second switching portion are respectively formed at the two ends of the first adjustment slot, the first switching portion is located at the rear side of the second switching portion, the first locking piece contacts the first switching portion to switch the first locking column from the first end to the second end, and the first locking piece contacts the second switching portion to switch the first locking column from the second end to the first end.

5. The lumbar pillow structure according to claim 4, characterized in that: The first locking member is formed with a first sleeve column, and the first sleeve column is formed on one side of the radial direction of the first locking column. The first adjustment component also includes: a first elastic member, one end of the first elastic member is sleeved on the first sleeve column, and the other end of the first elastic member abuts against the side wall of the first accommodating portion, and the first elastic member always has a force to move the first locking column toward the first slot.

6. The lumbar pillow structure according to claim 2, characterized in that: The second adjustment component comprises: a third connecting seat, the third connecting seat being rotatably connected to the second connecting seat, and the second adjusting groove being formed on the third connecting seat; a fourth connecting seat, wherein the fourth connecting seat is slidably matched with the third connecting seat so that the lumbar pillow assembly moves in the up-down direction, a second accommodating portion is formed on a side of the fourth connecting seat facing the third connecting seat, a second guide groove communicating with the second accommodating portion is formed on the fourth connecting seat, and a third end, a fourth end and a second bending section connected between the third end and the fourth end are formed in the second guide groove; A second locking member, the second locking member is arranged in the second accommodating portion, the second locking member is formed with a second locking column, one end of the second locking column is arranged in the second adjusting groove, the second locking portion is formed at the one end of the second locking column, the other end of the second locking column is arranged in the second guide groove, when the second locking member swings left and right relative to the third connecting seat, the second locking column slides between the third end and the second bending section, when the second locking member moves up and down relative to the third connecting seat, the second locking column slides between the fourth end and the second bending section.

7. The lumbar pillow structure according to claim 6, characterized in that: The second accommodating portion is formed with a second connecting column, and the second locking member is formed with a second through groove extending along the length direction of the second locking member. The second connecting column is arranged in the second through groove. When the second locking column slides between the third end and the second bending section, the second locking member rotates around the second connecting column. When the second locking column slides between the fourth end and the second bending section, the second connecting column slides in the second through groove.

8. The lumbar pillow structure according to claim 7, characterized in that: A third switching portion and a fourth switching portion are respectively formed at both ends of the second adjustment groove, the third switching portion is located at the lower side of the fourth switching portion, the second locking piece contacts the third switching portion to switch the second locking column from the third end to the fourth end, and the second locking piece contacts the fourth switching portion to switch the second locking column from the fourth end to the third end.

9. The lumbar pillow structure according to claim 8, characterized in that: The second locking member is formed with a second sleeve column, and the second sleeve column is formed on one side of the radial direction of the second locking column. The second adjustment assembly also includes: a second elastic member, one end of the second elastic member is sleeved on the second sleeve column, and the other end of the second elastic member abuts against the side wall of the second accommodating portion.

10. The lumbar pillow structure according to any one of claims 6 to 9, characterized in that: A first rotating hole is formed on the second connecting seat, and a second rotating hole is formed on the third connecting seat. The second connecting seat and the third connecting seat are rotatably connected by a rotating shaft penetrating into the first rotating hole and the second rotating hole.

11. The lumbar pillow structure according to any one of claims 2 to 5, characterized in that: A first sliding groove is formed on one of the first connecting seat and the second connecting seat, and a first sliding block is formed on the other of the first connecting seat and the second connecting seat. The first sliding block is slidably disposed in the first sliding groove.

12. The lumbar pillow structure according to claim 10, characterized in that: Also includes: A fixed plate, a second sliding block is formed on at least one of the fixed plate and the fourth connecting seat, the fixed plate and the fourth connecting seat are connected through the second sliding block, a second sliding groove is formed on the third connecting seat, and the second sliding block can be slidably disposed in the second sliding groove.

13. The lumbar pillow structure according to any one of claims 2 to 9, characterized in that: The lumbar pillow assembly includes: a limiting assembly, a lumbar pillow body and a lumbar pillow bracket. The lumbar pillow body and the lumbar pillow bracket are rotatably connected through the limiting assembly. The first connecting seat is connected to the lumbar pillow bracket. The limiting assembly is used to limit the relative position between the lumbar pillow body and the lumbar pillow bracket.

14. The lumbar pillow structure according to claim 13, characterized in that: A first connecting block is formed on the lumbar pillow body, and the limiting assembly includes: A limiting member, wherein a first limiting portion and a third sleeve column are formed on the limiting member, a second limiting portion is formed on the outer peripheral wall of the first limiting block, and the first limiting portion cooperates with the second limiting portion; The third elastic member is sleeved on the third sleeve column, one end of the third elastic member abuts against the limiting member, and the other end of the third elastic member abuts against the lumbar pillow support, and the third elastic member always has the force to move the limiting member toward the lumbar pillow body.

15. The lumbar pillow structure according to claim 14, characterized in that: The first limiting portion is formed as a limiting groove, and the second limiting portion is formed as a plurality of limiting teeth, each of the limiting teeth being suitable for extending into the limiting groove.

16. The lumbar pillow structure according to claim 14, characterized in that: The first connecting block is formed with a first connecting hole, and the first connecting hole protrudes from the first connecting block in the left-right direction. The lumbar pillow bracket is formed with a second connecting hole, and the first connecting hole and the second connecting hole are coaxially arranged. The limiting member also includes a sleeve, and the sleeve is sleeved in the first connecting hole and the second connecting hole.

17. The lumbar pillow structure according to claim 16, characterized in that: The lumbar pillow body is provided with the first connecting blocks at both ends in the left and right directions, each of the first connecting blocks is formed with a first connecting hole, and the lumbar pillow bracket is provided with the second connecting holes at both ends in the left and right directions, and the first connecting holes are arranged in a one-to-one correspondence with the second connecting holes.

18. The lumbar pillow structure according to claim 17, characterized in that: The limiting assembly further includes a cover body, which extends in the left-right direction and covers the second connecting hole.

19. A seat, characterized in that: include: A backrest structure and a lumbar pillow structure as described in any one of claims 1 to 18, wherein the lumbar pillow structure is connected to the backrest structure via a fixing plate, and the lumbar pillow structure and the backrest structure are relatively movable.

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