A lumbar support structure with massage and adjustment functions and an office chair

Abstract

The utility model provides a kind of waist rest structure and office chair with massage and adjusting function, and the waist rest structure with massage and adjusting function includes: backrest;Waist rest, waist rest is set on backrest liftable, and massage assembly is set on waist rest, wherein, massage assembly includes multiple rotating massage head module, controller and battery module, rotating massage head module is set on waist rest, controller is set on waist rest, and is electrically connected with rotating massage head module, and battery module is detachably set on the rear side of waist rest, and is electrically connected with controller.Relative to prior art, the waist rest structure with massage and adjusting function of the utility model can realize massage function, thereby relieving the aching feeling of user's waist, improving the comfort of user, and control is convenient, and battery module is also detachable and convenient for different scenarios;Waist rest can be adjusted up and down, and realize adaptive adjustment before and after, can adapt to the body shape of different users.

Description

Technical Field

[0001] This utility model relates to the field of office chair technology, specifically to a lumbar support structure and office chair with massage and adjustment functions. Background Technology

[0002] Office chairs refer to various types of chairs provided for convenience during daily work and social activities. Since sitting in office chairs for extended periods can easily lead to many adverse health effects, and significantly increases the risk of cervical spondylosis, headrests are typically included in these chairs to facilitate rest and relaxation for office workers.

[0003] Office chairs typically include a base, backrest, backrest, lumbar support, and headrest. The base usually has multiple casters to facilitate the movement of the office chair. The backrest is fixed to the base for the user to sit on, and the backrest is located behind the backrest. The backrest is installed on the backrest to support the user's back. The headrest is installed on the backrest to support the user's head, and the lumbar support is installed on the backrest to support the user's back.

[0004] Users may experience lower back pain and require massage when working for long periods. In such cases, it is necessary to purchase a massager. Currently, most lumbar support structures are simply soft cushions without massage function, resulting in poor functionality. Utility Model Content

[0005] The purpose of this invention is to overcome the shortcomings and deficiencies of the existing technology and provide a lumbar support structure and office chair with massage and adjustment functions.

[0006] One embodiment of this utility model provides a lumbar support structure with massage and adjustment functions, including: Back to; A lumbar support is provided, which is height-adjustable and mounted on the backrest. The lumbar support is equipped with a massage component, which includes multiple rotating massage head modules, a controller, and a battery module. The rotating massage head modules are mounted on the lumbar support, the controller is mounted on the lumbar support and electrically connected to the rotating massage head modules, and the battery module is detachably mounted on the rear side of the lumbar support and electrically connected to the controller.

[0007] In some optional embodiments, the massage component further includes a button control module, a Bluetooth communication module, and a voice control module. The button control module is located on one side of the lumbar support and is electrically connected to the controller. The Bluetooth communication module and the voice control module are located inside the controller and are electrically connected to the controller.

[0008] In some alternative embodiments, the backrest is provided with a plurality of fastening parts, and the battery module is provided with a plurality of fastening slots, the fastening slots being detachably fastened to the fastening parts.

[0009] In some optional embodiments, the opening of the fastening groove has a first limiting part and an avoidance inlet arranged side by side. The first limiting part is provided with a limiting groove extending toward the avoidance inlet. The fastening part has a second limiting part and a sliding part connected to each other. When the fastening groove is fastened with the fastening part, the second limiting part extends from the avoidance inlet into the limiting groove and then moves to the side of the first limiting part facing into the fastening groove. The sliding part extends into the limiting groove.

[0010] In some alternative implementations, the limiting groove shrinks or narrows in the direction away from the avoidance inlet.

[0011] In some optional embodiments, the lifting adjustment structure includes a lifting adjustment seat and a spring-loaded structure, and the lumbar support is flexibly and vertically mounted on the backrest via the lifting adjustment seat; The rebound structure includes a rebound elastic element, a first guide post disposed on the lifting adjustment seat, and a first guide sleeve disposed on the rear side of the lumbar support. The first guide sleeve is movably sleeved on the outside of the first guide post and can move back and forth relative to the first guide post. The rebound elastic element is disposed between the lifting adjustment seat and the lumbar support.

[0012] In some optional embodiments, the first guide post is provided with a guide groove, and a plurality of second guide posts are provided in the guide groove; The first guide sleeve is provided with a plurality of second guide sleeves, which are sleeved on the outside of the second guide post and slide in cooperation with the second guide post; The rebound elastic element includes multiple rebound springs, which are respectively sleeved on the outside of the second guide post and abut against the end of the second guide sleeve.

[0013] In some optional embodiments, the lifting adjustment structure further includes a lifting adjustment groove and a sliding adjustment component. The lifting adjustment groove is disposed on the backrest. Both sides of the lifting adjustment groove are provided with multiple ratchet grooves arranged sequentially from top to bottom. The upper end of the lifting adjustment groove is provided with a closing guide part, and the lower end of the lifting adjustment groove is provided with an opening guide part. The sliding adjustment component includes a clamping elastic element and two pawls. The two pawls are provided with a first locking part and a second locking part. The pawls are rotatably mounted on the lifting adjustment seat. The clamping elastic element is connected to the two pawls respectively. When the two pawls approach each other, the pawls squeeze or stretch the clamping elastic element to cause the clamping elastic element to produce elastic deformation. The elastic force of the clamping elastic element is directed towards the ratchet groove. The pawl and the ratchet groove are positioned and engaged so that the lifting adjustment seat can only rise relative to the backrest; When the two pawls move upward to the closing guide, the closing guide guides the two pawls to move closer to each other to disengage from the ratchet groove, and the first locking part and the second locking part engage to restrict the two pawls from opening. When the two pawls move downwards to the opening guide, the opening guide guides the two pawls to unfold.

[0014] In some alternative embodiments, the first snap-fit ​​portion is a slot, and the second snap-fit ​​portion is a snap-fit ​​member, wherein the snap-fit ​​member snaps into the slot to achieve a snap-fit ​​engagement between the first snap-fit ​​portion and the second snap-fit ​​portion.

[0015] Another embodiment of this utility model provides an office chair, including: a lumbar support structure with massage and adjustment functions as described above.

[0016] Compared to existing technologies, the lumbar support structure with massage and adjustment functions of this utility model can realize the massage function, thereby relieving the user's lower back pain and improving the user's comfort. It is easy to control, and the battery module is detachable, making it convenient to use in different scenarios. The lumbar support can be adjusted up and down to adapt to different user body shapes. In addition, the lumbar support can also be adjusted forward and backward. After the user sits down, the rebound structure can realize passive cushioning, and the position can also be adjusted forward and backward to make the lumbar support fit the user's body shape. The overall structure is simple and the adjustment operation is convenient.

[0017] To provide a clearer understanding of this invention, the specific embodiments of this invention will be described below in conjunction with the accompanying drawings. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of a lumbar support structure with massage and adjustment functions according to an embodiment of the present invention; Figure 2 This is an exploded view of a lumbar support structure with massage and adjustment functions according to an embodiment of the present invention; Figure 3 This is a schematic diagram of the lumbar support structure of one embodiment of the present invention when the battery module is hidden; Figure 4 This is a schematic diagram of the structure of a battery module according to an embodiment of the present invention; Figure 5 for Figure 3 The enlarged view at point A is shown below; Figure 6 This is a schematic diagram of the structure of a lifting adjustment seat according to an embodiment of the present invention; Figure 7 This is a partial cross-sectional view of the lumbar support and height adjustment seat according to an embodiment of the present invention; Figure 8 This is a schematic diagram of the back-to-back structure of one embodiment of the present utility model; Figure 9 for Figure 8 The enlarged view of point B shown.

[0019] Explanation of reference numerals in the attached figures: 10. Backrest; 20. Lumbar support; 21. Massage component; 22. Rotating massage head module; 23. Controller; 24. Battery module; 25. Button control module; 26. Fastening part; 261. Second limiting part; 262. Sliding part; 27. Fastening groove; 271. First limiting part; 272. Avoidance entrance; 273. Limiting slide groove; 30. Lifting adjustment structure; 31. Lifting adjustment seat; 32. Lifting adjustment groove; 321. Racket groove; 322. Closing guide part; 323. Opening guide part; 33. Sliding adjustment part; 331. Pawl; 332. First locking part; 333. Second locking part; 40. Rebound structure; 41. Rebound elastic element; 411. Rebound spring; 42. First guide post; 421. Guide groove; 422. Second guide post; 43. First guide sleeve; 431. Second guide sleeve. Detailed Implementation

[0020] The technical solutions of the present invention will now be clearly and completely described with reference to the accompanying drawings of the embodiments thereof. Please refer to... Figure 1 and Figure 2 One embodiment of this utility model provides a lumbar support structure with massage and adjustment functions, comprising: Backed by 10; The lumbar support 20 is heightably mounted on the backrest 10. The lumbar support 20 is equipped with a massage component 21, which includes multiple rotating massage head modules 22, a controller 23, and a battery module 24. The rotating massage head modules 22 are mounted on the lumbar support 20, the controller 23 is mounted on the lumbar support 20 and electrically connected to the rotating massage head modules 22, and the battery module 24 is detachably mounted on the rear side of the lumbar support 20 and electrically connected to the controller 23.

[0021] The working principle of a lumbar support structure with massage and adjustment functions according to an embodiment of this utility model is explained below: The lumbar support 20 can be adjusted relative to the backrest 10, thus allowing for height adjustment to suit users of different body types and provide better comfort.

[0022] The rotating massage head module 22 on the lumbar support 20 can massage the user's lower back, thereby relieving lower back pain. The battery module 24 can power the rotating massage head module 22, and it can be removed for charging, avoiding the need for direct power connection and the resulting tangled wires in the office chair.

[0023] It should be noted that a connector structure can also be designed on the battery module 24. This connector structure may include a charging interface for connecting to a charger. In suitable scenarios, the charging interface can also be directly plugged into an AC power source, allowing the AC power source to directly power the rotating massage head module 22, eliminating the hassle of disassembling the battery module 24 for charging. The specific usage method of the power module can be determined according to the user's actual usage scenario and is not limited to this example. The connector structure can also be designed with an output interface, which can be connected to a mobile phone charging cable to power the mobile phone. The structure of the connector is well-known to those skilled in the art and will not be described in detail here.

[0024] Furthermore, the method of electrically connecting the battery module 24 and the controller 23 can be designed according to actual needs. For example, electrical contacts can be provided on the rear side of the lumbar support 20 and on the battery module 24. After the battery module 24 is installed on the rear side of the lumbar support 20, the electrical contacts of the lumbar support 20 and the battery module 24 make contact, thereby achieving electrical connection between the electrical contacts of the lumbar support 20 and the battery module 24. The electrical contacts of the lumbar support 20 can be connected to the controller 23 via wires, thereby achieving electrical connection between the battery module 24 and the controller 23. Of course, in other embodiments, the controller 23 can also be connected to a power socket, and the battery module 24 can be provided with a power plug. The power plug is plugged into the power socket to achieve electrical connection between the controller 23 and the battery module 24. The method of electrically connecting the battery module 24 and the controller 23 is a technology known to those skilled in the art and will not be described in detail here.

[0025] The specific structure of the rotating massage head module 22 can be selected according to actual needs. For example, the rotating massage head module 22 includes a drive motor and a massage head. The massage head is rotatably mounted on the lumbar support 20. The drive motor can be electrically connected to the controller 23 via wires. The output shaft of the drive motor is connected to the massage head to drive it, thereby realizing the rotation of the massage head. The structure of the rotating massage head module 22 is a technology known to those skilled in the art and will not be described in detail here.

[0026] In this embodiment, a soft padding cover can also be provided on the lumbar support 20. The soft padding cover covers the lumbar support 20 to cover the controller 23 and the rotating massage head module 22, thereby improving aesthetics and comfort. After the user's waist is pressed on the rotating massage head module 22 by the soft padding cover, the rotating massage head module 22 can also realize the massage function.

[0027] Please see Figure 3 In some optional embodiments, the massage component 21 further includes a button control module 25, a Bluetooth communication module, and a voice control module. The button control module 25 is located on one side of the lumbar support 20 and is electrically connected to the controller 23. The Bluetooth communication module and the voice control module are located inside the controller 23 and are electrically connected to the controller 23.

[0028] The controller 23 may be a control circuit board, etc.

[0029] The Bluetooth communication module and voice control module are mounted on the circuit board. The structure of the Bluetooth communication module and the method of electrically connecting it to the circuit board are well-known to those skilled in the art and will not be described in detail here. Users can connect to the Bluetooth communication module via mobile phones, computers, tablets, remote controls, and other devices, thereby facilitating remote control of the rotating massage head module 22. The operation is convenient.

[0030] The voice control module allows users to control the rotating massage head module 22 by voice. It can be a voice control module similar to Tmall Genie. Its structure and the way it is electrically connected to the circuit board are well known to those skilled in the art, and will not be described in detail here.

[0031] The button control module 25 can be a mechanical button switch, which is installed on the outer side of the lumbar support 20. The user can control the rotating massage head module 22 by pressing the button control module 25, and this example is not limited to this one.

[0032] The assembly and disassembly method of the battery module 24 can be designed according to actual needs. For example, in some optional embodiments, the backrest 20 is provided with a plurality of fastening parts 26, and the battery module 24 is provided with a plurality of fastening slots 27. The fastening slots 27 and the fastening parts 26 can be detachably fastened together, thereby realizing the quick assembly and disassembly of the battery module 24. Of course, the assembly and disassembly method of the battery module 24 is not limited to this, and those skilled in the art can also choose other suitable structures based on the teachings of this utility model.

[0033] Please see Figure 4 and Figure 5To improve the installation stability of the battery module 24, in some optional embodiments, a first limiting part 271 and a clearance entrance 272 are formed side by side at the opening of the fastening groove 27. The first limiting part 271 is provided with a limiting groove 273 extending toward the clearance entrance 272. The fastening part 26 is formed with a second limiting part 261 and a sliding part 262 connected to each other. When the fastening groove 27 and the fastening part 26 are fastened together, the second limiting part 261 extends from the clearance entrance 272 into the limiting groove 273. Then, the battery module 24 is moved so that the second limiting part 261 moves to the side of the first limiting part 271 facing into the fastening groove 27, so that the first limiting part 271 restricts the second limiting part 261 and prevents it from disengaging from the fastening groove 27. When the second limiting part 261 moves, the sliding part 262 will extend into the limiting groove 273 and slide along the limiting groove 273.

[0034] In some alternative embodiments, the limiting groove 273 is reduced in size in the direction away from the avoidance entrance 272. The shape design of the limiting groove 273 facilitates guiding the sliding part 262 into the limiting groove 273, and also allows the limiting groove 273 and the sliding part 262 to be interference-fitted, thereby limiting the position of the limiting part, and further limiting the position of the fastening part 26 relative to the fastening groove 27, thus improving the stability of the fastening.

[0035] In some optional embodiments, the lifting adjustment structure 30 includes a lifting adjustment seat 31, through which the lumbar support 20 is flexibly mounted on the backrest 10; the rebound structure 40 includes a rebound elastic element 41, a first guide post 42 mounted on the lifting adjustment seat 31, and a first guide sleeve 43 mounted on the rear side of the lumbar support 20. The first guide sleeve 43 is movably mounted on the outside of the first guide post 42 and can move back and forth relative to the first guide post 42. The first guide sleeve 43 and the first guide post 42 cooperate to improve the movement stability of the lumbar support 2020 relative to the lifting adjustment seat 3131.

[0036] The lumbar support 20 can be height adjusted relative to the backrest 10 through the lifting adjustment seat 31 of the lifting adjustment structure 30, so that the position of the lumbar support 20 can be actively adjusted relative to the user's waist, thereby improving the user's comfort.

[0037] The spring-loaded elastic element 41 is disposed between the height adjustment seat 31 and the lumbar support 20. After the user sits in the office chair, the user's lower back presses against the lumbar support 20. Under the user's weight, the first guide sleeve 43 moves backward relative to the first guide post 42, so that the lumbar support 20 can adaptively move backward to adjust its position. At this time, the spring-loaded elastic element 41 will undergo elastic deformation. The elastic force of the spring-loaded elastic element 41 drives the lumbar support 20 to press against the user's lower back, so that the lumbar support 20 remains against the user's lower back, thereby providing support for the user's lower back.

[0038] Please see Figure 6 and Figure 7 In some optional embodiments, a guide groove 421 is provided on the first guide post 42, and a plurality of second guide posts 422 are provided in the guide groove 421; a plurality of second guide sleeves 431 are provided in the first guide sleeve 43, and the second guide sleeves 431 are sleeved on the outside of the second guide post 422 and slide in cooperation with the second guide post 422. The cooperation between the second guide sleeves 431 and the second guide post 422 increases the support position between the first guide post 42 and the first guide sleeve 43, which helps to improve the stability of the relative sliding of the first guide post 42 and the first guide sleeve 43. The rebound elastic element 41 includes a plurality of rebound springs 411, which are correspondingly sleeved on the outside of the second guide post 422 and abut against the end of the second guide sleeve 431. When the lumbar support 20 moves backward toward the lifting adjustment seat 31, the second guide post 422 will move along the second guide sleeve 431 and press against the rebound spring 411, causing the rebound spring 411 to undergo elastic deformation. Multiple rebound springs 411 can also improve the stress stability of the lumbar support 20.

[0039] Please see Figure 8 and Figure 9 In some optional embodiments, the lifting adjustment structure 30 further includes a lifting adjustment groove 32 and a sliding adjustment member 33. The lifting adjustment groove 32 is disposed on the backrest 10. Multiple ratchet grooves 321 arranged sequentially from top to bottom are provided on both sides of the lifting adjustment groove 32. A closing guide part 322 is provided at the upper end of the lifting adjustment groove 32, and an opening guide part 323 is provided at the lower end of the lifting adjustment groove 32. The sliding adjustment member 33 includes a pressing elastic member and two pawls 331. A first locking part 332 and a second locking part 333 are provided on the two pawls 331. The pawls 331 are rotatably disposed on the lifting adjustment seat 31. The pressing elastic member is connected to the two pawls 331 respectively. When the two pawls 331 approach each other, the pawls 331 squeeze or stretch the pressing elastic member to cause the pressing elastic member to produce elastic deformation. The elastic force of the pressing elastic member is directed towards the ratchet groove 321.

[0040] Taking the initial state where the pawl 331 and the ratchet groove 321 are engaged as an example, the pawl 331 and the ratchet groove 321 are positioned and engaged. At this time, the lifting adjustment seat 31 can only rise relative to the back of 10 and cannot move downward, thereby realizing the adjustment of the height position of the lifting adjustment seat 31. Since the lifting adjustment seat 31 will not move downward, the gravity of the lifting adjustment seat 31 will drive the pawl 331 to press against the ratchet groove 321. With the elastic force of the clamping elastic element, the pawl 331 is pressed into the ratchet groove 321, so that the pawl 331 and the ratchet groove 321 can stably engage and position the lifting adjustment seat 31. If the lifting adjustment seat 31 needs to be adjusted upward relative to the backrest 10, force is applied to lift the lifting adjustment seat 31. At this time, the two pawls 331 will be guided by the ratchet groove 321 to move closer to each other until the pawls 331 cross the current ratchet groove 321. After reaching the adjacent ratchet groove 321 above, the elastic force of the pressing elastic element will drive the pawls 331 to press again into the adjacent ratchet groove 321 above, thereby adjusting the height by one level.

[0041] When it is necessary to adjust the lifting adjustment seat 31 downwards, the lifting adjustment seat 31 needs to be moved upwards along the lifting adjustment groove 32 to the highest point of its stroke. During the upward movement, when the two pawls 331 move upwards to the closing guide part 322, the closing guide part 322 will guide the two pawls 331 to move closer to each other so that the pawls 331 disengage from the ratchet groove 321. The first locking part 332 and the second locking part 333 engage to restrict the opening of the two pawls 331. At this time, the pawls 331 will not open under the elastic force of the clamping elastic element because they are restricted. Therefore, the pawls 331 will not engage with the ratchet groove 321. At this time, the pawls 331 of the lifting adjustment seat 31 can descend along the lifting adjustment groove 32, so that the lifting adjustment seat 31 can also descend. When the lifting adjustment seat 31 moves downwards... When the device moves to the lowest point of its travel range, it will cause the two pawls 331 to move downwards to the opening guide 323. At this time, the opening guide 323 guides the two pawls 331 away from each other, causing the two pawls 331 to unfold. After the two pawls 331 unfold, the first locking part 332 and the second locking part 333 separate from each other, releasing the restriction on the pawls 331. At this time, the lifting adjustment seat 31 rises again, and the pawls 331 rise along the lifting adjustment groove 32. After the pawls 331 reach the lowest ratchet groove 321, the two pawls 331 can enter the two ratchet grooves 321 under the drive of the clamping elastic element, realizing the limiting cooperation between the pawls 331 and the ratchet groove 321. Then, the lifting adjustment seat 31 is moved upwards to the position to be adjusted.

[0042] Since the lifting adjustment seat 31 can achieve unidirectional step-by-step adjustment, when the position to be adjusted is lower than the current position, the backrest 10 needs to be raised to the highest position, then returned to the lowest position, and finally raised to the position to be adjusted.

[0043] The specific structures of the first latching portion 332 and the second latching portion 333 can be designed according to actual needs. For example, in some optional embodiments, the first latching portion 332 is a latching slot, and the second latching portion 333 is a latching member, which is inserted into the latching slot to achieve a latching engagement between the first latching portion 332 and the second latching portion 333. Of course, other suitable structures can also be used for the first latching portion 332 and the second latching portion 333, and this example is not limited to them.

[0044] Another embodiment of this utility model provides an office chair, including: a lumbar support structure with massage and adjustment functions as described above.

[0045] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A lumbar support structure with massage and adjustment functions, characterized in that, include: Back to; A lumbar support is provided, which is height-adjustable and mounted on the backrest. The lumbar support is equipped with a massage component, which includes multiple rotating massage head modules, a controller, and a battery module. The rotating massage head modules are mounted on the lumbar support, the controller is mounted on the lumbar support and electrically connected to the rotating massage head modules, and the battery module is detachably mounted on the rear side of the lumbar support and electrically connected to the controller.

2. The lumbar support structure with massage and adjustment functions according to claim 1, characterized in that: The massage component also includes a button control module, a Bluetooth communication module, and a voice control module. The button control module is located on one side of the lumbar support and is electrically connected to the controller. The Bluetooth communication module and the voice control module are located inside the controller and are electrically connected to the controller.

3. The lumbar support structure with massage and adjustment functions according to claim 1, characterized in that: The backrest is provided with several fastening parts, and the battery module is provided with several fastening slots, which can be detachably fastened to the fastening parts.

4. The lumbar support structure with massage and adjustment functions according to claim 3, characterized in that: The opening of the fastening groove has a first limiting part and an avoidance entrance arranged side by side. The first limiting part is provided with a limiting groove extending toward the avoidance entrance. The fastening part has a second limiting part and a sliding part connected to each other. When the fastening groove is fastened with the fastening part, the second limiting part extends from the avoidance entrance into the limiting groove, and then moves to the side of the first limiting part facing into the fastening groove. The sliding part extends into the limiting groove.

5. A lumbar support structure with massage and adjustment functions according to claim 4, characterized in that: The limiting slide groove shrinks and narrows in the direction away from the avoidance entrance.

6. A lumbar support structure with massage and adjustment functions according to any one of claims 1 to 5, characterized in that, It also includes a lifting adjustment structure and a rebound structure. The lifting adjustment structure includes a lifting adjustment seat, and the lumbar support is flexibly and vertically mounted on the backrest through the lifting adjustment seat. The rebound structure includes a rebound elastic element, a first guide post disposed on the lifting adjustment seat, and a first guide sleeve disposed on the rear side of the lumbar support. The first guide sleeve is movably sleeved on the outside of the first guide post and can move back and forth relative to the first guide post. The rebound elastic element is disposed between the lifting adjustment seat and the lumbar support.

7. A lumbar support structure with massage and adjustment functions according to claim 6, characterized in that: The first guide post is provided with a guide groove, and a plurality of second guide posts are provided in the guide groove; The first guide sleeve is provided with a plurality of second guide sleeves, which are sleeved on the outside of the second guide post and slide in cooperation with the second guide post; The rebound elastic element includes multiple rebound springs, which are respectively sleeved on the outside of the second guide post and abut against the end of the second guide sleeve.

8. A lumbar support structure with massage and adjustment functions according to claim 6, characterized in that: The lifting adjustment structure also includes a lifting adjustment groove and a sliding adjustment component. The lifting adjustment groove is provided on the backrest. Both sides of the lifting adjustment groove are provided with multiple ratchet grooves arranged sequentially from top to bottom. The upper end of the lifting adjustment groove is provided with a closing guide part, and the lower end of the lifting adjustment groove is provided with an opening guide part. The sliding adjustment component includes a clamping elastic element and two pawls. The two pawls are provided with a first locking part and a second locking part. The pawls are rotatably mounted on the lifting adjustment seat. The clamping elastic element is connected to the two pawls respectively. When the two pawls approach each other, the pawls squeeze or stretch the clamping elastic element to cause the clamping elastic element to produce elastic deformation. The elastic force of the clamping elastic element is directed towards the ratchet groove. The pawl and the ratchet groove are positioned and engaged so that the lifting adjustment seat can only rise relative to the backrest; When the two pawls move upward to the closing guide, the closing guide guides the two pawls to move closer to each other to disengage from the ratchet groove, and the first locking part and the second locking part engage to restrict the two pawls from opening. When the two pawls move downwards to the opening guide, the opening guide guides the two pawls to unfold.

9. A lumbar support structure with massage and adjustment functions according to claim 8, characterized in that: The first snap-fit ​​part is a slot, and the second snap-fit ​​part is a snap-fit ​​component. The snap-fit ​​component is snapped into the slot to achieve a snap-fit ​​engagement between the first snap-fit ​​part and the second snap-fit ​​part.

10. An office chair, characterized in that, include: A lumbar support structure with massage and adjustment functions as described in any one of claims 1 to 9.

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