Waist rest mounting mechanism

Abstract

The utility model discloses a waist rest mounting mechanism which comprises a back frame, the back frame is configured to be provided with mesh cloth, mounting parts are arranged on the left side and the right side of the back frame, the rear ends of the two mounting parts are connected through a transversely-arranged connecting rod, and the connecting rod is of a curved bar structure with the middle protruding backwards, so that an interval exists between the middle of the connecting rod and the back frame in the front-back direction; a waist rest body is arranged at the interval, the rear end of the waist rest body is connected to the connecting rod, and the supporting face at the front end of the waist rest body is flush with the front ends of the left side and the right side of the back frame. Or the supporting surface at the front end of the waist rest body forwards exceeds the front ends of the left and right sides of the back frame. According to the waist rest mounting mechanism provided by the invention, the waist rest body is arranged on the gap between the back frame and the connecting rod, and the connecting rod has no backward abrupt feeling relative to the back frame, so that the appearance of a seat is light and attractive; moreover, the waist rest body is mounted through the mounting pieces and the connecting rods on the two sides of the back frame, so that the connecting structure is relatively simple, and the processing and manufacturing operation of the seat is relatively simple and convenient.

Description

Technical Field

[0001] The utility model generally relates to the technical field of seats, and in particular to a lumbar support installation mechanism. Background Art

[0002] Chairs are commonly used in people's daily lives. With the continuous improvement of technology, the comfort of seats is also constantly improving. Mesh seats are popular products in the current market. The backrest of this type of seat is a frame structure, and a layer of mesh is laid at the front end of the back frame to support the user's back. The mesh can not only fit the user's back with its elasticity and provide a soft and comfortable support experience, but also the good breathability of the mesh means that even in the hot summer, the user's back will not be hot and sweaty due to the close contact with the mesh. The simple and lightweight appearance of the mesh seat also makes it more simple and beautiful than ordinary seats.

[0003] However, due to the softness of the mesh, the mesh alone cannot provide strong support for the user's waist, so a lumbar support needs to be set on the back side of the back frame. Traditional mesh chairs usually have a vertical back support on the back side of the back frame. There is a gap between the back support and the mesh at the lumbar support position, and a lumbar support is set at the corresponding position of the back support so that the support surface of the lumbar support can fit the mesh. However, the above solution has the following problems: the back support protrudes backward relative to the back frame, which has a relatively abrupt feeling, making the appearance of the entire seat bloated and not aesthetically pleasing.

[0004] The existing patent also provides a configuration and use method of a sliding lumbar support seat (application number: CN202311460138.5). Connecting parts are symmetrically provided on both sides of the back frame, and connecting grooves are opened in the connecting parts. The two sides of the lumbar support board are connected to the connecting grooves through elastic limiters, and a mesh cloth is laid on the front side of the back frame to cover the elastic limiters. In this way, the lumbar support board can be directly connected to the back frame, and the lumbar support board does not have a protruding feeling backwards relative to the back frame. However, the above scheme has the following problems: in order to have enough space to install the lumbar support board, the back frame needs to be thicker, and the appearance is relatively heavy, without the light beauty, and the aesthetics is insufficient; and, it is necessary to process the connecting structure for connecting to the lumbar support board on the inner side of the back frame, which makes the manufacturing and processing operation of the back frame more complicated and the manufacturing cost is higher.

[0005] Therefore, how to ensure that the seat is light and beautiful in appearance while making the connection structure between the lumbar support and the back frame simple and easy to manufacture and process has become the main problem that needs to be solved at present. Summary of the invention

[0006] In view of the above-mentioned defects or shortcomings in the prior art, it is desired to provide a lumbar support mounting mechanism, which can arrange the lumbar support body in the interval between the back frame and the connecting rod, so that the back frame, the lumbar support body and the connecting rod are relatively compact with each other, and the connecting rod does not have a protruding sense backward relative to the back frame, thereby making the appearance of the seat lighter and more beautiful; and, the lumbar support body is installed by means of the mounting parts on both sides of the back frame and the connecting rod between the two mounting parts, the connection structure is relatively simple, and there is no need for additional processing of the back frame, so that the processing and manufacturing operations of the seat are relatively simple.

[0007] The effect of the utility model is achieved in this way:

[0008] The present application provides a lumbar support installation mechanism, comprising a back frame, which is configured to install a mesh cloth, and mounting parts are arranged on both sides of the back frame. The rear ends of the two mounting parts are connected by a laterally arranged connecting rod, and the connecting rod is a curved rod structure with a middle portion protruding backward, so that there is a gap between the middle portion of the connecting rod and the back frame in the front-to-back direction, and a lumbar support body is arranged at the gap, and the rear end of the lumbar support body is connected to the connecting rod, and the support surface at the front end of the lumbar support body is flush with the front ends of the left and right sides of the back frame; or, the support surface at the front end of the lumbar support body extends forward beyond the front ends of the left and right sides of the back frame; the support surface is configured to fit the mesh cloth of the back frame and support the user's waist.

[0009] Furthermore, a mounting sleeve is sleeved in the middle of the connecting rod, the lumbar support body is connected to the mounting sleeve, and the lumbar support body and the mounting sleeve are connected by a sliding assembly, so that the lumbar support body can slide up and down relative to the mounting sleeve. The user can adjust the height of the lumbar support body according to the use situation, ensuring that the lumbar support body can fit the waist, providing a more stable and comfortable support effect.

[0010] Furthermore, the lumbar support body is a split structure, including a front cover plate and a rear cover plate spliced ​​together front and back, a sandwich is formed between the front cover plate and the rear cover plate, and the sandwich forms a receiving cavity for connecting the sliding assembly; the sliding assembly includes a stopper arranged transversely in the receiving cavity, the rear cover plate is hollowed out and provided with an avoidance groove extending in the vertical direction, the avoidance groove is connected to the receiving cavity and directly faces the stopper, a sliding support is arranged on the front side of the mounting sleeve, the sliding support passes through the avoidance groove and is connected to the stopper, so that the lumbar support body can slide up and down along the avoidance groove relative to the sliding support. By connecting the sliding support to the stopper in the receiving cavity, the lumbar support body is limited by the stopper during the sliding process, and is not easy to fall off from the sliding support, and the sliding process is relatively stable; and the stopper and the sliding support are located in the receiving cavity inside the lumbar support body, so that in appearance, the sliding assembly will not be exposed to the lumbar support body, making the appearance of the lumbar support body more concise and beautiful.

[0011] Furthermore, two symmetrical avoidance grooves are provided on the rear cover plate, and two symmetrical sliding supports are provided on the front side of the mounting sleeve, and the sliding supports on both sides pass through the avoidance grooves and are connected to the two ends of the stopper. When the lumbar support body slides, it is limited by the two sliding supports on the left and right, and the sliding process is more stable, less likely to shake left and right, and the adjustment operation is smoother.

[0012] Furthermore, a gear adjustment component is provided between the rear cover plate and the stopper, and the gear adjustment component includes an elastic washer provided on the stopper and a plurality of gear slots provided on the rear cover plate, the gear slot is a circular slot having the same shape as the elastic washer, and the plurality of gear slots are arranged in the vertical direction and connected to each other to form a complete wave-shaped slot; when the lumbar support body slides up and down relative to the stopper, the elastic washer switches in the plurality of gear slots by means of elastic deformation and engages with the gear slots to achieve gear adjustment. Under the engagement and cooperation of the elastic washer and the plurality of gear slots, there are a plurality of adjustment gears, and the lumbar support body can stay at any adjustment height, and the gear sense is obvious; and the elastic washer switches in the plurality of gear slots by means of elastic deformation, which not only makes the adjustment have a good damping feel, but also the elastic washer can be stably engaged in the gear slot by means of damping to limit the sliding of the lumbar support body, and when adjusting, it is only necessary to directly apply a force to the lumbar support body, making the gear adjustment operation very simple.

[0013] Furthermore, a plurality of elastic washers are arranged on the stopper along the width direction, and a plurality of wave-shaped grooves formed by a combination of a plurality of gear grooves are correspondingly arranged on the rear cover plate. By arranging a plurality of gear adjustment components between the stopper and the rear cover plate, the lumbar support body is restricted by the plurality of elastic washers and gear grooves when sliding, so that the sliding process is smoother, less prone to left and right shaking, and the adjustment operation is more stable.

[0014] Furthermore, the left and right ends of the stopper are respectively provided with a clamping head and a connecting hole, and the sliding supports on both sides are correspondingly provided with a clamping slot and a threaded hole. After the clamping head is clamped into the clamping slot, the stopper on one side and the sliding support are clamped and fixed, and after the connecting hole is aligned with the threaded hole and fixed by screws, the stopper on the other side and the sliding support are screwed and fixed. This not only makes the connection strength between the stopper and the sliding support higher, but also makes the installation and disassembly operations between the two easier.

[0015] Furthermore, semi-cylindrical rear splicing parts extend from both ends of the connecting rod, and a semi-cylindrical front splicing part extends from the rear end of the mounting piece. When the connecting rod is connected to the mounting piece, the front splicing part and the rear splicing part are connected to form a complete cylindrical structure, and the two are fixed by bolts. The connecting rod and the mounting piece are fixed by bolts, which makes the installation and disassembly operations between the two relatively simple; and the front splicing part and the rear splicing part are semi-cylindrical structures, which not only facilitates the opening of screw holes between the two, but also allows the two to be combined to form a complete cylindrical structure after being connected, which is more integrated and beautiful in appearance.

[0016] Furthermore, the rear end of the mounting member is bent to form a bent portion, which overlaps the rear end of the back frame and is connected to the back frame by screws, which not only increases the connection strength between the two, but also makes the installation and disassembly operations between the two easier.

[0017] Furthermore, the front end of the mounting piece extends forward to form an armrest connecting portion, and the armrest connecting portion is configured to connect the armrest. Through the mounting piece, the armrest, the back frame and the lumbar support body are mutually connected as a whole, thereby further improving the strength of the entire seat.

[0018] The lumbar support mounting mechanism provided in the present application arranges the lumbar support body in the interval between the back frame and the connecting rod, so that the back frame, the lumbar support body and the connecting rod are relatively compact with each other, and the connecting rod does not have a protruding sense backward relative to the back frame, thereby making the appearance of the seat lighter and more beautiful; and the lumbar support body is installed by means of the mounting parts on both sides of the back frame and the connecting rod between the two mounting parts, the connection structure is relatively simple, and there is no need for additional processing of the back frame, so that the processing and manufacturing operations of the seat are relatively simple; not only that, the lumbar support body can slide up and down relative to the connecting rod through the sliding mechanism, so that the user can adjust the vertical height of the lumbar support body at will according to the usage situation. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Other features, objects and advantages of the present application will become more apparent by reading the detailed description of non-limiting embodiments made with reference to the following drawings:

[0020] Figure 1 A schematic diagram of the front structure of the lumbar support body and the back frame provided in an embodiment of the present application;

[0021] Figure 2 A schematic diagram of the back structure of the lumbar support body and the back frame provided in an embodiment of the present application;

[0022] Figure 3 A schematic diagram of the side structure of the back frame when the lumbar support body provided in the embodiment of the present application is adjusted to the lowest position;

[0023] Figure 4A schematic diagram of the side structure of the back frame when the lumbar support body provided in an embodiment of the present application is adjusted to the highest position;

[0024] Figure 5 A schematic diagram of the internal structure of a lumbar support body provided in an embodiment of the present application;

[0025] Figure 6 A schematic diagram of the connection structure between the stop plate and the rear cover plate provided in an embodiment of the present application;

[0026] Figure 7 A schematic cross-sectional structure diagram of a lumbar support body provided in an embodiment of the present application;

[0027] Figure 8 A schematic diagram of the connection structure between the mounting member, the back frame and the connecting rod provided in an embodiment of the present application.

[0028] The figures are marked as follows: 1-back frame, 110-mounting part, 111-front splicing part, 112-bending part, 113-armrest connecting part, 120-connecting rod, 121-rear splicing part, 130-mounting sleeve, 131-sliding support part, 132-slot, 133-threaded hole, 140-stopper, 141-elastic washer, 142-clamp, 143-connecting hole, 2-lumbar support body, 201-support surface, 202-accommodating cavity, 210-front cover plate, 220-rear cover plate, 221-avoidance groove, 222-gear groove. DETAILED DESCRIPTION

[0029] The present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the relevant utility model, rather than to limit the utility model. It is also necessary to explain that, for ease of description, only the parts related to the utility model are shown in the accompanying drawings.

[0030] The embodiment of the present application provides a lumbar support installation mechanism, including a back frame 1, which is configured to install a mesh cloth, and mounting parts 110 are provided on both sides of the back frame 1. The rear ends of the two mounting parts 110 are connected by a laterally arranged connecting rod 120. The connecting rod 120 is a curved rod structure with a middle portion protruding backward, so that there is a gap between the middle portion of the connecting rod 120 and the back frame 1 in the front-to-back direction. A lumbar support body 2 is provided at the gap, and the rear end of the lumbar support body 2 is connected to the connecting rod 120. The support surface 201 at the front end of the lumbar support body 2 is flush with the front ends of the left and right sides of the back frame 1; or, the support surface 201 at the front end of the lumbar support body 2 exceeds the front ends of the left and right sides of the back frame 1 forward; the support surface 201 is configured to fit the mesh cloth of the back frame 1 and support the user's waist.

[0031] In this embodiment, the lumbar support body 2 is arranged in the interval between the back frame 1 and the connecting rod 120, so that the back frame 1, the lumbar support body 2 and the connecting rod 120 are relatively compact with each other, and the connecting rod 120 does not have a protruding sense backward relative to the back frame 1, thereby making the appearance of the seat lighter and more beautiful; and the lumbar support body 2 is installed by means of the mounting parts 110 on both sides of the back frame 1 and the connecting rod 120 between the two mounting parts 110, the connection structure is relatively simple, and there is no need for additional processing of the back frame 1, so that the processing and manufacturing operation of the seat is relatively simple.

[0032] The cross section of the connecting rod 120 is circular or oval, the connecting rod 120 is made of metal, and the width of the cross section of the connecting rod 120 is 1.5-2.5 cm.

[0033] In some embodiments of the present application, a mounting sleeve 130 is sleeved on the middle portion of the connecting rod 120, the lumbar support body 2 is connected to the mounting sleeve 130, and the lumbar support body 2 and the mounting sleeve 130 are connected by a sliding assembly, so that the lumbar support body 2 can slide up and down relative to the mounting sleeve 130.

[0034] In this embodiment, for people of different body shapes, the height of their waist from the seat is different. If the position of the lumbar support body 2 is fixed, the height of the lumbar support body 2 relative to the user's waist may be too high or too low, resulting in the problem of failing to provide effective support for the user's waist. Therefore, by sliding the lumbar support body 2 to the installation sleeve 130, the user can adjust the height of the lumbar support body 2 according to the situation, ensuring that the lumbar support body 2 can fit the user's waist and provide a more stable and comfortable support effect.

[0035] Among them, the installation sleeve 130 is a split structure composed of two semicircular tubes spliced ​​front and back. After the front and rear semicircular tubes of the installation sleeve 130 are respectively attached to the front and rear sides of the connecting rod 120, the three are connected and fixed by screws, making the installation operation of the installation sleeve 130 relatively simple.

[0036] In some embodiments of the present application, the lumbar support body 2 is a split structure, including a front cover plate 210 and a rear cover plate 220 spliced ​​together front and back, and an interlayer is formed between the front cover plate 210 and the rear cover plate 220, and the interlayer forms a accommodating cavity 202 for connecting the sliding component; the sliding component includes a stopper 140 arranged transversely in the accommodating cavity 202, and the rear cover plate 220 is hollowed out and provided with an avoidance groove 221 extending in the vertical direction, the avoidance groove 221 is connected to the accommodating cavity 202 and is opposite to the stopper 140, and a sliding support member 131 is arranged on the front side of the mounting sleeve 130, and the sliding support member 131 passes through the avoidance groove 221 and is connected to the stopper 140, so that the lumbar support body 2 can slide up and down along the avoidance groove 221 relative to the sliding support member 131.

[0037] In the present embodiment, by connecting the sliding support member 131 to the stop member 140 in the accommodating cavity 202, the lumbar support body 2 is limited by the stop member 140 during the sliding process and is not easy to fall off the sliding support member 131, so the sliding process is relatively stable; in addition, the stop member 140 and the sliding support member 131 are located in the accommodating cavity 202 on the inner side of the lumbar support body 2, so that in appearance, the sliding component is not exposed from the lumbar support body 2, making the appearance of the lumbar support body 2 more concise and beautiful.

[0038] In some embodiments of the present application, two symmetrical avoidance grooves 221 are provided on the rear cover plate 220, and two symmetrical sliding support members 131 are correspondingly provided on the front side of the mounting sleeve 130. The sliding support members 131 on both sides pass through the avoidance grooves 221 and are connected to the two ends of the stop member 140.

[0039] In this embodiment, two avoidance grooves 221 are opened on the rear side of the rear cover plate 220, and the mounting sleeve 130 is slidably connected to the lumbar support body 2 through two sliding supports 131, so that the lumbar support body 2 is limited by the two left and right sliding supports 131 when sliding, the sliding process is smoother, less prone to left and right shaking, and the adjustment operation is smoother.

[0040] In some embodiments of the present application, a gear adjustment assembly is arranged between the rear cover plate 220 and the stop member 140, and the gear adjustment assembly includes an elastic gasket 141 arranged on the stop member 140 and a plurality of gear grooves 222 opened on the rear cover plate 220, the gear groove 222 is a circular groove with the same shape as the elastic gasket 141, and the plurality of gear grooves 222 are arranged in the vertical direction and are interconnected to form a complete wavy groove; when the lumbar support body 2 slides up and down relative to the stop member 140, the elastic gasket 141 switches in the plurality of gear grooves 222 by means of elastic deformation and engages with the gear grooves 222, thereby realizing gear adjustment.

[0041] In this embodiment, due to the snap-fitting action of the elastic gasket 141 and the plurality of gear slots 222, there are multiple adjustment gears, and the lumbar support body 2 can stay at any adjustment height with an obvious gear feeling; and the elastic gasket 141 switches in the plurality of gear slots 222 with the help of elastic deformation, which not only makes the adjustment have a good damping feel, but also the elastic gasket 141 can be stably stuck in the gear slot 222 with the help of damping to limit the sliding of the lumbar support body 2, and when adjusting, it is only necessary to directly apply a force to the lumbar support body 2, which makes the gear adjustment operation very simple.

[0042] Preferably, the elastic gasket 141 is made of silicone material, which not only has good elastic deformation ability, but also has a large friction coefficient, which can provide a good damping feeling. Of course, in other embodiments of the present application, the elastic gasket 141 can also be made of rubber, resin, etc.

[0043] In some embodiments of the present application, a plurality of elastic washers 141 are disposed on the stopper 140 along the width direction, and a plurality of wavy grooves formed by a combination of a plurality of gear grooves 222 are correspondingly provided on the rear cover plate 220 .

[0044] In this embodiment, by setting multiple groups of gear adjustment components between the stopper 140 and the rear cover plate 220, the lumbar support body 2 is restricted by multiple groups of elastic washers 141 and gear grooves 222 when sliding, the sliding process is smoother, less likely to shake left and right, and the adjustment operation is more stable.

[0045] In some embodiments of the present application, a clamping head 142 and a connecting hole 143 are respectively provided at the left and right ends of the stop member 140, and a clamping groove 132 and a threaded hole 133 are correspondingly provided on the sliding support members 131 on both sides. After the clamping head 142 is inserted into the clamping groove 132, the stop member 140 and the sliding support member 131 on one side are clamped and fixed, and after the connecting hole 143 is aligned with the threaded hole 133 and fixed by screws, the stop member 140 and the sliding support member 131 on the other side are screwed and fixed.

[0046] In this embodiment, the left and right ends of the stopper 140 are respectively clamped and screwed to the sliding support member 131, which not only makes the connection strength between the stopper 140 and the sliding support member 131 higher, but also makes the installation and disassembly operations between the two easier.

[0047] In some embodiments of the present application, semi-cylindrical rear splicing portions 121 are extended from both ends of the connecting rod 120, and a semi-cylindrical front splicing portion 111 is correspondingly extended from the rear end of the mounting member 110. When the connecting rod 120 is connected to the mounting member 110, the front splicing portion 111 and the rear splicing portion 121 are connected to form a complete cylindrical structure, and the two are fixed by bolts.

[0048] In this embodiment, the connecting rod 120 and the mounting member 110 are fixed by bolt connection, so that the installation and disassembly operations between the two are relatively simple; and the front splicing portion 111 and the rear splicing portion 121 are semi-cylindrical structures, which not only facilitates the opening of screw holes between the two and the connection of bolts, but also allows the two to be combined to form a complete cylindrical structure after being connected, which is more integrated and beautiful in appearance.

[0049] In some embodiments of the present application, the rear end of the mounting member 110 is bent to form a bent portion 112 , the bent portion 112 is overlapped with the rear end of the back frame 1 , and the bent portion 112 is connected to the back frame 1 by screw connection.

[0050] In this embodiment, by connecting the back frame 1 to the angle area of ​​the bending portion 112, the connection strength between the two is made higher; and the bending portion 112 is connected to the back frame 1 by screw connection, so that the installation and disassembly operations between the two are relatively simple, and the connection traces between the back frame 1 and the mounting member 110 are hidden on the rear side of the back frame 1, making the appearance of the seat neater and more beautiful.

[0051] In some embodiments of the present application, the front end of the mounting member 110 extends forward to form an armrest connecting portion 113 , and the armrest connecting portion 113 is configured to connect the armrest.

[0052] In this embodiment, the mounting member 110 is connected to the armrest of the seat via the armrest connecting portion 113, whereby the armrest, the back frame 1 and the lumbar support body 2 are interconnected as a whole via the mounting member 110, thereby further improving the overall strength of the seat.

[0053] Preferably, the armrest connecting portion 113 is connected to the armrest by threaded connection, so that the installation and disassembly operations between the mounting member 110 and the armrest are easier.

[0054] It should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like used above to indicate 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 cannot be understood as a limitation on the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. 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 utility model, unless otherwise specified, "multiple" means more than three.

[0055] The above description is only a preferred embodiment of the present application and an explanation of the technical principles used. Those skilled in the art should understand that the scope of the utility model involved in the present application is not limited to the technical solution formed by a specific combination of the above technical features, but should also cover other technical solutions formed by any combination of the above technical features or their equivalent features without departing from the concept of the utility model. For example, the above features are replaced with the technical features with similar functions disclosed in the present application (but not limited to) by each other to form a technical solution.

Claims

1. A lumbar support mounting mechanism, characterized in that: The invention comprises a back frame (1), wherein the back frame (1) is configured to install a mesh cloth, and mounting members (110) are arranged on both left and right sides of the back frame (1), and the rear ends of the two mounting members (110) are connected via a laterally arranged connecting rod (120), and the connecting rod (120) is a curved rod structure with a middle portion protruding backwards, so that there is a gap between the middle portion of the connecting rod (120) and the back frame (1) in the front-to-back direction, and a lumbar support body (2) is arranged at the gap, and the rear end of the lumbar support body (2) is connected to the connecting rod (120), and the support surface (201) at the front end of the lumbar support body (2) is flush with the front ends of the left and right sides of the back frame (1); or, the support surface (201) at the front end of the lumbar support body (2) extends forward beyond the front ends of the left and right sides of the back frame (1); the support surface (201) is configured to fit the mesh cloth of the back frame (1) and support the waist of the user.

2. The lumbar support mounting mechanism according to claim 1, characterized in that: A mounting sleeve (130) is sleeved in the middle of the connecting rod (120), the lumbar support body (2) is connected to the mounting sleeve (130), and the lumbar support body (2) and the mounting sleeve (130) are connected via a sliding assembly, so that the lumbar support body (2) can slide up and down relative to the mounting sleeve (130).

3. The lumbar support mounting mechanism according to claim 2, characterized in that: The lumbar support body (2) is a split structure, comprising a front cover plate (210) and a rear cover plate (220) spliced ​​together front and back, an interlayer is formed between the front cover plate (210) and the rear cover plate (220), the interlayer forming a receiving cavity (202) for connecting the sliding assembly; the sliding assembly comprises a stopper (140) arranged transversely in the receiving cavity (202), the rear cover plate (220) is hollowed out and provided with an avoidance groove (221) extending in a vertical direction, the avoidance groove (221) is connected to the receiving cavity (202) and faces the stopper (140), a sliding support member (131) is arranged on the front side of the mounting sleeve (130), the sliding support member (131) passes through the avoidance groove (221) and is connected to the stopper (140), so that the lumbar support body (2) can slide up and down along the avoidance groove (221) relative to the sliding support member (131).

4. The lumbar support mounting mechanism according to claim 3, characterized in that: The rear cover plate (220) is provided with two symmetrical avoidance grooves (221), and the front side of the mounting sleeve (130) is correspondingly provided with two symmetrical sliding support members (131), and the sliding support members (131) on both sides pass through the avoidance grooves (221) and are connected to the two ends of the stop member (140).

5. The lumbar support mounting mechanism according to claim 4, characterized in that: A gear adjustment component is arranged between the rear cover plate (220) and the stopper (140), and the gear adjustment component comprises an elastic washer (141) arranged on the stopper (140) and a plurality of gear slots (222) opened on the rear cover plate (220), wherein the gear slot (222) is a circular slot having the same shape as the elastic washer (141), and the plurality of gear slots (222) are arranged in a vertical direction and interconnected to form a complete wave-shaped slot; when the lumbar support body (2) slides up and down relative to the stopper (140), the elastic washer (141) switches in the plurality of gear slots (222) by means of elastic deformation and engages with the gear slots (222), thereby achieving gear adjustment.

6. The lumbar support mounting mechanism according to claim 5, characterized in that: A plurality of elastic washers (141) are provided on the stopper (140) along the width direction, and a plurality of wavy grooves formed by combining the plurality of gear slots (222) are correspondingly provided on the rear cover plate (220).

7. The lumbar support mounting mechanism according to claim 4, characterized in that: The left and right ends of the stopper (140) are respectively provided with a clamping head (142) and a connecting hole (143); the sliding support members (131) on both sides are correspondingly provided with a clamping groove (132) and a threaded hole (133); after the clamping head (142) is clamped into the clamping groove (132), the stopper (140) and the sliding support member (131) on one side are clamped and fixed; after the connecting hole (143) is aligned with the threaded hole (133) and fixed by screws, the stopper (140) and the sliding support member (131) on the other side are screwed and fixed.

8. The lumbar support mounting mechanism according to claim 1, characterized in that: Semi-cylindrical rear splicing portions (121) extend from both ends of the connecting rod (120), and a semi-cylindrical front splicing portion (111) correspondingly extends from the rear end of the mounting member (110); when the connecting rod (120) is connected to the mounting member (110), the front splicing portion (111) and the rear splicing portion (121) are connected to form a complete cylindrical structure, and the two are fixed by bolt connection.

9. The lumbar support mounting mechanism according to claim 1, characterized in that: The rear end of the mounting member (110) is bent to form a bent portion (112), the bent portion (112) is overlapped with the rear end of the back frame (1), and the bent portion (112) is connected to the back frame (1) by means of screw connection.

10. The lumbar support mounting mechanism according to claim 1, characterized in that: The front end of the mounting member (110) extends forward to form an armrest connecting portion (113), and the armrest connecting portion (113) is configured to be connected to an armrest.

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