Lumbar support chair

Abstract

A lumbar support chair includes a hip support portion, a lumbar support portion, and a locking device. The hip support portion is used for supporting at least one part of a hip and at least one part of a leg of a user. The lumbar support portion used for supporting at least one part of a waist of the user. The hip support portion is detachably connected to the lumbar support portion through the locking device. When the user sits on the hip support portion, the lumbar support portion provides necessary support for the user's lumbar spine. Moreover, the lumbar support portion and the hip support portion are capable of being disassembled through the locking device, allowing for independent manufacturing during the production process.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS

[0001] The application claims priority of Chinese patent application CN2025200645236, filed on Jan. 10, 2025, which is incorporated herein by reference in its entireties.TECHNICAL FIELD

[0002] The present invention relates to the field of chairs, particularly to a lumbar support chair.BACKGROUND ART

[0003] With the changes in people's lifestyles and work styles, prolonged sitting has become the norm for many people in modern society. However, prolonged poor sitting posture and lack of effective lumbar support often lead to discomfort and even injury to the lumbar spine and lower back. In order to alleviate these problems, various lumbar support chairs have emerged on the market. These chairs provide lumbar and back support through scientific design to improve sitting posture and reduce lumbar pressure.

[0004] However, most existing lumbar support chairs are fixed as a whole. In production, transportation, and daily carrying and use, the traditional fixed lumbar supports are not easy to produce and package due to their structure, often increasing the difficulty of production and transportation costs.SUMMARY

[0005] In order to overcome the shortcomings of the prior art, a lumbar support chair is provided in the present invention. The lumbar support chair is provided in the present invention to reduce pressure on a lumbar spine caused by prolonged sitting for a user, facilitate the user to carry in daily life, reduce production costs, and improve transportation efficiency.

[0006] The technical solution adopted by the present invention to solve its technical problems is as follows.

[0007] A lumbar support chair is provided in the present invention, including:

[0008] a hip support portion used for supporting at least one part of a hip and at least one part of a leg of a user;

[0009] a lumbar support portion used for supporting at least one part of a waist of the user; and

[0010] a first locking device, wherein the hip support portion is detachably connected to the lumbar support portion through the first locking device.

[0011] As an improvement of the present invention, the lumbar support chair further includes a second locking device. The hip support portion and the lumbar support portion are detachably connected through the first locking device and the second locking device.

[0012] As an improvement of the present invention, the first locking device includes a first locking member and a first locking fitting member. The first locking member is positioned at the hip support portion, and the first locking fitting member is positioned at the lumbar support portion. The first locking member is connected to the first locking fitting member, so that the hip support portion is locked and fixed to the lumbar support portion.

[0013] Alternatively, the first locking member is positioned at the lumbar support portion, and the first locking fitting member is positioned at the hip support portion.

[0014] As an improvement of the present invention, the first locking member includes at least one first engaging buckle, and the first locking fitting member includes at least one first engaging groove. The first engaging buckle is engaged with the first engaging groove, so that the hip support portion is locked and fixed to the lumbar support portion.

[0015] As an improvement of the present invention, one end of the lumbar support portion connected to the hip support portion is concavely provided with at least one first insertion groove. At least one of the first insertion grooves is provided with the first engaging groove. One end of the hip support portion connected to the lumbar support portion is convexly provided with at least one first insertion member. At least one first insertion member is provided with the first engaging buckle. When the first insertion member is inserted into the first insertion groove, the first engaging buckle is engaged with the first engaging groove.

[0016] As an improvement of the present invention, the first locking device includes a first locking member and a first locking fitting member. The first locking member is positioned at the hip support portion, and the first locking fitting member is positioned at the lumbar support portion. The second locking device includes a second locking member and a second locking fitting member. The second locking member is positioned at the lumbar support portion, and the second locking fitting member is positioned at the hip support portion. The second locking member is connected to the second locking fitting member, and the first locking member is connected to the first locking fitting member, so that the hip support portion is locked and fixed to the lumbar support portion.

[0017] As an improvement of the present invention, the first locking member includes at least one first engaging buckle, and the first locking fitting member includes at least one first engaging groove. The first engaging buckle is engaged with the first engaging groove, so that the hip support portion is locked and fixed to the lumbar support portion. The second locking member includes at least one second engaging buckle, and the second locking fitting member includes at least one second engaging groove. The second engaging buckle is engaged with the second engaging groove, so that the hip support portion is locked and fixed to the lumbar support portion.

[0018] As an improvement of the present invention, one end of the lumbar support portion connected to the hip support portion is concavely provided with at least one first insertion groove. At least one of the first insertion grooves is provided with the first engaging groove. One end of the hip support portion connected to the lumbar support portion is convexly provided with at least one first insertion member. At least one first insertion member is provided with the first engaging buckle. When the first insertion member is inserted into the first insertion groove, the first engaging buckle is engaged with the first engaging groove. The end of the lumbar support portion connected to the hip support portion is convexly provided with at least one second insertion member. At least one of the second insertion members is provided with the second engaging buckle. The end of the hip support portion connected to the lumbar support portion is concavely provided with at least one second insertion groove. At least one of the second insertion grooves is provided with the second engaging groove. When the second insertion member is inserted into the second insertion groove, the second engaging buckle is engaged with the second engaging groove.

[0019] As an improvement of the present invention, the first engaging buckle is positioned on one side of the first insertion member near a hip of a user. The first insertion groove is positioned in one side of the lumbar support portion away from a waist of the user.

[0020] As an improvement of the present invention, the first engaging buckle is positioned on one side of the first insertion member near a hip of a user. The first insertion groove is positioned in one side of the lumbar support portion away from a waist of the user. The second engaging buckle is positioned on one side of the second insertion member near the waist of the user. The second insertion groove is positioned in one side of the hip support portion away from the hip of the user.

[0021] As an improvement of the present invention, the hip support portion is convexly provided with at least two first insertion members. The lumbar support portion is concavely provided with at least two first insertion grooves. One side of the hip support portion away from a hip of a user is provided with a first reinforcing rib extending from the first insertion member.

[0022] As an improvement of the present invention, the hip support portion is convexly provided with at least two first insertion members. The lumbar support portion is concavely provided with at least two first insertion grooves. The hip support portion is concavely provided with at least two second insertion grooves. The lumbar support portion is convexly provided with at least two second insertion member. One side of the hip support portion away from a hip of a user is provided with a first reinforcing rib extending downward from the first insertion member. One side of the lumbar support portion away from a waist of the user is provided with a second reinforcing rib extending upward from the second insertion member.

[0023] As an improvement of the present invention, the first insertion members and the second insertion grooves are arranged in a staggered manner, and the first insertion grooves and the second insertion members are arranged in a staggered manner.

[0024] As an improvement of the present invention, the first locking member includes an insertion groove portion and a position limiting member. The insertion groove portion and the position limiting member are both positioned at a bottom of the hip support portion. The insertion groove portion includes a third insertion groove and a plurality of insertion foot grooves. The third insertion groove is in communication with the plurality of insertion foot grooves. The first locking fitting member is a transverse insertion portion connected to a bottom end of the lumbar support portion. The transverse insertion portion includes a third insertion member and a plurality of insertion feet. The third insertion member is matched with the third insertion groove. The insertion feet are connected to the third insertion member and are matched with the insertion foot grooves. The position limiting member is connected to a left side and a right side of the hip support portion, and covers the insertion foot grooves. The position limiting member is used for limiting the transverse insertion portion within the insertion groove portion.

[0025] Alternatively, the first locking member includes an insertion groove portion and a position limiting member. The insertion groove portion and the position limiting member are both positioned at a bottom of the lumbar support portion. The insertion groove portion includes a third insertion groove and a plurality of insertion foot grooves. The third insertion groove is in communication with the plurality of insertion foot grooves. The first locking fitting member is a transverse insertion portion connected to a bottom end of the hip support portion. The transverse insertion portion includes a third insertion member and a plurality of insertion feet. The third insertion member is matched with the third insertion groove. The insertion feet are connected to the third insertion member and are matched with the insertion foot grooves. The position limiting member is connected to a left side and a right side of the lumbar support portion, and covers the insertion foot grooves. The position limiting member is used for limiting the transverse insertion portion within the insertion groove portion.

[0026] As an improvement of the present invention, the first locking member includes an insertion end, a first position limiting groove, and a second position limiting groove. The insertion end is provided on the hip support portion. The first position limiting groove and the second position limiting groove are opposite and are respectively defined in an upper side and a lower side of the hip support portion. The first locking fitting member includes a transverse connecting portion connected to a bottom end of the lumbar support portion. The transverse connecting portion is provided with an upper position limiting member and a lower position limiting member. The upper position limiting member and the lower position limiting member jointly surround and form an insertion space. A gap is defined between one end of the upper position limiting member and one end of the lower position limiting member, so that the upper position limiting member is formed with a first position limiting protrusion matching the first position limiting groove, and the lower position limiting member is formed with a second position limiting protrusion matching the second position limiting groove. The first locking member is clamped into the first locking fitting member along a direction in which the first locking member is distributed, so that the hip support portion is connected to the lumbar support portion.

[0027] Alternatively, the first locking member includes an insertion end, a first position limiting groove and a second position limiting groove. The insertion end is provided on the lumbar support portion. The first position limiting groove and the second position limiting groove are opposite and are respectively defined in an upper side and a lower side of the lumbar support portion. The first locking fitting member includes a transverse connecting portion connected to a bottom end of the hip support portion. The transverse connecting portion is provided with an upper position limiting member and a lower position limiting member. The upper position limiting member and the lower position limiting member jointly surround and form an insertion space. A gap is defined between one end of the upper position limiting member and one end of the lower position limiting member, so that the upper position limiting member is formed with a first position limiting protrusion matching the first position limiting groove, and the lower position limiting member is formed with a second position limiting protrusion matching the second position limiting groove. The first locking member is clamped into the first locking fitting member along a direction in which the first locking member is distributed, so that the lumbar support portion is connected to the hip support portion.

[0028] As an improvement of the present invention, the hip support portion is connected to a vertical connecting portion. The first locking member includes a plurality of first clamping blocks provided at the vertical connecting portion. The first locking fitting member includes first clamping cavities. The first clamping cavities are defined in one end of the lumbar support portion connected to the vertical connecting portion, and are matched with the first clamping blocks. The second locking member includes second clamping blocks positioned at one end of the lumbar support portion connected to the vertical connecting portion. The second locking fitting member includes second clamping cavities defined in the vertical connecting portion and matched with the second clamping blocks. The first clamping blocks and the second clamping cavities are arranged in a staggered manner, and the second clamping blocks and the first clamping cavities are arranged in a staggered manner.

[0029] Alternatively, the lumbar support portion is connected to a vertical connecting portion. The first locking member includes a plurality of first clamping blocks provided at the vertical connecting portion. The first locking fitting member includes first clamping cavities. The first clamping cavities are defined in one end of the hip support portion connected to the vertical connecting portion, and are matched with the first clamping blocks. The second locking member includes second clamping blocks positioned at the end of the hip support portion connected to the vertical connecting portion. The second locking fitting member includes second clamping cavities defined in the vertical connecting portion and matched with the second clamping blocks. The first clamping blocks and the second clamping cavities are arranged in a staggered manner, and the second clamping blocks and the first clamping cavities are arranged in a staggered manner.

[0030] As an improvement of the present invention, the first locking member includes a plurality of first locking holes defined in the hip support portion. The lumbar support portion is equipped with a transverse connecting portion. The second locking member includes a plurality of second locking holes defined in the transverse connecting portion. A screw is capable of passing through the first locking hole and the second locking hole to fix and lock the transverse connecting portion to the hip support portion.

[0031] Alternatively, the first locking member includes a plurality of first locking holes defined in the lumbar support portion. The hip support portion is equipped with a transverse connecting portion. The second locking member includes a plurality of second locking holes defined in the transverse connecting portion. A screw is capable of passing through the first locking hole and the second locking hole to fix and lock the transverse connecting portion to the lumbar support portion.

[0032] As an improvement of the present invention, the hip support portion is provided with a plurality of first heat dissipation holes. The plurality of first heat dissipation holes are symmetrically arranged on the hip support portion.

[0033] As an improvement of the present invention, the hip support portion is provided with a partition protrusion. The partition protrusion and a left end of the hip support portion form a concave first leg support groove. The partition protrusion and a right end of the hip support portion form a concave second leg support groove. The lumbar support portion includes a left lumbar support plate, a middle lumbar support plate, and a right lumbar support plate. The left lumbar support plate and the right lumbar support plate are symmetrically arranged and both protrude on one side towards the user.

[0034] As an improvement of the present invention, the lumbar support portion is also provided with a first handle hole. The first handle hole is defined in an upper end away from the hip support portion. One surface of the lumbar support portion facing a user is connected to a first flexible pad body. The lumbar support portion is provided with the first handle hole, and the first flexible pad body is provided with a second handle hole. The first handle hole and the second handle hole are matched in position and size. The first flexible pad body is formed by a plurality of sponge blocks. Each of the sponge blocks is separated by a first heat dissipation groove.

[0035] Beneficial effects of the present invention are as follows. The lumbar support chair is provided in the present invention, including the hip support portion, the lumbar support portion, and the locking device. The hip support portion is used for supporting at least one part of the hip and at least one part of the leg of the user. The lumbar support portion used for supporting at least one part of the waist of the user. The hip support portion is detachably connected to the lumbar support portion through the locking device. When the user sits on the hip support portion, the lumbar support portion provides necessary support for the user's lumbar spine, which can help maintain a natural curve of the spine and reduce the burden on the lumbar spine. Moreover, the lumbar support portion and the hip support portion can be disassembled through the locking device, so that independent manufacturing during the production process can be achieved, production difficulty is reduced, a space occupied during transportation and storage is significantly reduced, reducing transportation and storage costs, and at the same time facilitating the carrying and handling of the product.BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Implementations of the present disclosure will now be described, by way of embodiment, with reference to the attached figures. It should be understood, the drawings are shown for illustrative purpose only, for ordinary person skilled in the art, other drawings obtained from these drawings without paying creative labor by an ordinary person skilled in the art should be within scope of the present disclosure.

[0037] FIG. 1 is a schematic diagram of an overall structure of the present invention.

[0038] FIG. 2 is a schematic diagram of an overall structure of the present invention from another angle of view.

[0039] FIG. 3 is an exploded view of the present invention.

[0040] FIG. 4 is an exploded view of the present invention from another angle of view.

[0041] FIG. 5 is a sectional view of the present invention taken along a first insertion member.

[0042] FIG. 6 is an enlarged view of area A in FIG. 5.

[0043] FIG. 7 is a sectional view of the present invention taken along a second insertion member.

[0044] FIG. 8 is an enlarged view of area B in FIG. 7.

[0045] FIG. 9 is an exploded view of the present invention from a rear angle of view.

[0046] FIG. 10 is another exploded view of the present invention from a rear angle of view.

[0047] FIG. 11 is an enlarged view of area C in FIG. 10.

[0048] FIG. 12 is an enlarged view of area D in FIG. 10.

[0049] FIG. 13 is a front view of the present invention.

[0050] FIG. 14 is another exploded view of the present invention.

[0051] FIG. 15 is a schematic diagram of a structure of embodiment two of the present invention.

[0052] FIG. 16 is an exploded view of embodiment two of the present invention.

[0053] FIG. 17 is a schematic diagram of a structure of embodiment three of the present invention.

[0054] FIG. 18 is an exploded view of embodiment three of the present invention.

[0055] FIG. 19 is a schematic diagram of a structure of embodiment four of the present invention.

[0056] FIG. 20 is an exploded view of embodiment four of the present invention.

[0057] FIG. 21 is another exploded view of embodiment four of the present invention.

[0058] FIG. 22 is a schematic diagram of a structure of embodiment five of the present invention.

[0059] FIG. 23 is an exploded view of embodiment five of the present invention.DETAILED DESCRIPTION OF THE EMBODIMENTS

[0060] It will be appreciated that for simplicity and clarity of illustration, where appropriate, reference numerals have been repeated among the different figures to indicate corresponding or analogous elements. In addition, numerous specific details are set forth in order to provide a thorough understanding of the exemplary embodiments described herein. However, it will be understood by those of ordinary skill in the art that the exemplary embodiments described herein may be practiced without these specific details. In other instances, methods, procedures, and components have not been described in detail so as not to obscure the related relevant feature being described. Also, the description is not to be considered as limiting the scope of the exemplary embodiments described herein. The drawings are not necessarily to scale and the proportions of certain parts may be exaggerated to better illustrate details and features of the present disclosure.

[0061] The term “comprising” when utilized, means “including, but not necessarily limited to”; it specifically indicates open-ended inclusion or membership in the so-described combination, group, series, and the like. The disclosure is illustrated by way of example and not by way of limitation in the figures of the accompanying drawings in which like references indicate similar elements. It should be noted that references to “an” or “one” embodiment in this disclosure are not necessarily to the same embodiment, and such references can mean “at least one”. In addition, the terms “first” and “second” are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implying the number of indicated technical features. Thus, the features defined as “first” and “second” may explicitly or implicitly include one or more of the features. In the description of embodiments of the application, “a plurality of” means two or more, unless otherwise specifically defined.

[0062] Referring to FIGS. 1-14, a lumbar support chair includes:

[0063] a hip support portion 1 used for supporting at least one part of a hip and at least one part of a leg of a user;

[0064] a lumbar support portion 2 used for supporting at least one part of a waist of the user; and

[0065] a first locking device 3, wherein the hip support portion 1 is detachably connected to the lumbar support portion 2 through the first locking device 3. Through the above structure, when the user sits on the hip support portion 1, the lumbar support portion 2 provides necessary support for the user's lumbar spine, which can help maintain a natural curve of the spine and reduce the burden on the lumbar spine. Moreover, the lumbar support portion 2 and the hip support portion 1 can be disassembled through the first locking device 3, so that independent manufacturing during the production process can be achieved, production difficulty is reduced, a space occupied during transportation and storage is significantly reduced, thereby reducing transportation and storage costs, and at the same time facilitating the carrying and handling of the product.

[0066] In some embodiments, the hip support portion and the lumbar support portion are detachably connected by a buckle, a rivet, a screw, a suction member, an adhesive, a bolt, a rope, a pin, or a clamp. The suction member is a magnet or a suction cup.

[0067] In this embodiment, the first locking device 3 includes a first locking member 31 and a first locking fitting member 32. The first locking member 31 is positioned at the hip support portion 1, and the first locking fitting member 32 is positioned at the lumbar support portion 2. The first locking member 31 is connected to the first locking fitting member 32, so that the hip support portion 1 is locked and fixed to the lumbar support portion 2; alternatively, the first locking member 31 is positioned at the lumbar support portion 2, and the first locking fitting member 32 is positioned at the hip support portion 1.

[0068] Furthermore, the first locking member 31 includes at least one first engaging buckle 311, and the first locking fitting member 32 includes at least one first engaging groove 321. The first engaging buckle 311 is engaged with the first engaging groove 321, so that the hip support portion 1 is locked and fixed to the lumbar support portion 2. Specifically, the first locking member 31 includes three first engaging buckles 311, and the first locking fitting member 32 includes three first grooves 321. Through the above structure, an engaging structure between the first engaging buckle 311 and the first engaging groove 321 makes a connecting part less likely to loosen or fall off during use, thereby providing a durable and stable support effect.

[0069] In this embodiment, one end of the lumbar support portion 2 connected to the hip support portion 1 is concavely provided with at least one first insertion groove 33. At least one of the first insertion grooves 33 is provided with the first engaging groove 321. One end of the hip support portion 1 connected to the lumbar support portion 2 is convexly provided with at least one first insertion member 34. At least one of the first insertion members 34 is provided with the first engaging buckle 311. When the first insertion member 34 is inserted into the first insertion groove 33, the first engaging buckle 311 is engaged with the first engaging groove 321. Specifically, the hip support portion 1 is provided with four concave first insertion grooves 33 and five first insertion members 34. Through the above structure, the first insertion member 34 is inserted into the first insertion groove 33, and the first engaging buckle 311 is engaged with the first engaging groove 321, so that the lumbar support portion 2 and the hip support portion 1 can be stably connected together. The precise fit of the first insertion member 34 and the first insertion groove 33 makes the assembly process more convenient and efficient, reducing the time and effort of the user during installation or disassembly.

[0070] In this embodiment, the lumbar support chair further includes a second locking device 4. The hip support portion 1 and the lumbar support portion 2 are detachably connected through the first locking device 3 and the second locking device 4.

[0071] Specifically, the first locking device 3 includes the first locking member 31 and the first locking fitting member 32. The first locking member 31 is positioned at the hip support portion 1, and the first locking fitting member 32 is positioned at the lumbar support portion 2. The second locking device 4 includes a second locking member 41 and a second locking fitting member 42. The second locking member 41 is positioned at the lumbar support portion 2, and the second locking fitting member 42 is positioned at the hip support portion 1. The second locking member 41 is connected to the second locking fitting member 42, and the first locking member 31 is connected to the first locking fitting member 32, so that the hip support portion 1 is locked and fixed to the lumbar support portion 2.

[0072] Furthermore, the first locking member 31 includes at least one first engaging buckle 311, and the first locking fitting member 32 includes at least one first engaging groove 321. The first engaging buckle 311 is engaged with the first engaging groove 321, so that the hip support portion 1 is locked and fixed to the lumbar support portion 2. The second locking member 41 includes at least one second engaging buckle 411, and the second locking fitting member 42 includes at least one second engaging groove 421. The second engaging buckle 411 is engaged with the second engaging groove 421, so that the hip support portion 1 is locked and fixed to the lumbar support portion 2. Through the above structure, by the cooperative engagement between the first engaging buckle 311 and the second engaging buckle 321, and the cooperative engagement between the second engaging buckle 411 and the second engaging groove 421, the lumbar support portion 2 and the hip support portion 1 are designed with an upper and lower double-layered buckle connection structure, making a connection part less likely to loosen or fall off during use, thereby providing a more durable and stable support effect.

[0073] Furthermore, one end of the lumbar support portion 2 connected to the hip support portion 1 is concavely provided with at least one first insertion groove 33. At least one first insertion groove 33 is provided with the first engaging groove 321. One end of the hip support portion 1 connected to the lumbar support portion 2 is convexly provided with at least one first insertion member 34. At least one first insertion member 34 is provided with the first engaging buckle 311. When the first insertion member 34 is inserted into the first insertion groove 33, the first engaging buckle 311 is engaged with the first engaging groove 321. The end of the lumbar support portion 2 connected to the hip support portion 1 is convexly provided with at least one second insertion member 35. At least one second insertion member 35 is provided with the second engaging buckle 411. The end of the hip support portion 1 connected to the lumbar support portion 2 is concavely provided with at least one second insertion groove 36. At least one second insertion groove 36 is provided with the second engaging groove 421. When the second insertion member 35 is inserted into the second insertion groove 36, the second engaging buckle 411 is engaged with the second engaging groove 421. Through the above structure, by the cooperative engagement of the first insertion groove 33 and the first insertion member 34, together with the engaging design of double-layered buckle connection, the lumbar support portion 2 and the hip support portion 1 can be firmly connected together. The precise fit between the insertion member and the insertion groove makes the assembly process simpler and more efficient, reducing the time and effort of the user during installation or disassembly.

[0074] In this embodiment, the first insertion members 34 and the second insertion grooves 36 are arranged in a staggered manner, and the first insertion grooves 33 and the second insertion members 35 are arranged in a staggered manner. Through the above structure, the first insertion member 34 is inserted into the first insertion groove 33, and the second insertion member 35 is inserted into the second insertion groove 36, so that the firmness and stability of a connection part are improved. The structural design of staggered arrangement can effectively prevent loosening or displacement between support components, thereby enhancing the overall stability and load-bearing capacity of a support system. Moreover, during the user's sitting process, an interaction force is generated between the first insertion member 34 and the first insertion groove 33, and between the second insertion member 35 and the second insertion groove 36. This force further enhances the support effect of the lumbar support chair, and can provide stronger lumbar support, especially when the user leans back, thereby reducing the burden on the lumbar spine, and improving the user's comfort and safety.

[0075] In this embodiment, the first engaging buckle 311 is positioned on one side of the first insertion member 34 near a hip of a user. The first insertion groove 33 is positioned in one side of the lumbar support portion 2 away from a waist of the user. The second engaging buckle 411 is positioned on one side of the second insertion member 35 near the the waist of the user. The second insertion groove 36 is positioned in one side of the hip support portion 1 away from the hip of the user.

[0076] In this embodiment, the hip support portion 1 is convexly provided with at least two first insertion members 34. The lumbar support portion 2 is concavely provided with at least two first insertion grooves 33. The hip support portion 1 is concavely provided with at least two second insertion grooves 36. The lumbar support portion 2 is convexly provided with at least two second insertion member 35. One side of the hip support portion 1 away from a hip of a user is provided with a first reinforcing rib 341 extending downward from the first insertion member 34. One side of the lumbar support portion 2 away from a waist of the user is provided with a second reinforcing rib 351 extending upward from the second insertion member 35. Through the above structure, the arrangement of the first reinforcing rib 341 and the second reinforcing rib 351 enhances the overall rigidity and stability of the insertion members, thereby enhancing the support effect of the lumbar support chair, enabling the lumbar support chair to withstand a greater mechanical load in long-term use, and extending the service life of the product.

[0077] In this embodiment, a length L1 of the first engaging groove 321 is in a range from 1 mm to 150 mm, a height H1 of the first engaging groove 321 is in a range from 1 mm to 40 mm, and a width D1 of the first engaging groove 321 is in a range from 1 mm to 30 mm. Preferably, the length of the first engaging groove 321 is 7 mm, the height of the first engaging groove 321 is 6 mm, and the width of the first engaging groove 321 is 3 mm.

[0078] Furthermore, a length L2 of the first engaging buckle 311 is in a range from 1 mm to 150 mm, a height H2 of the first engaging buckle 311 is in a range from 1 mm to 40 mm, and a width D2 of the first engaging buckle 311 is in a range from 1 mm to 30 mm. Preferably, the length of the first engaging buckle 311 is 6 mm, the height of the first engaging buckle 311 is 5 mm, and the width of the first engaging buckle 311 is 3 mm.

[0079] In this embodiment, a length L3 of the second engaging groove 421 is in a range from 1 mm to 150 mm, a height H3 of the second engaging groove 421 is in a range from 1 mm to 40 mm, and a width D3 of the second engaging groove 421 is in a range from 1 mm to 30 mm. Preferably, the length of the second engaging groove 421 is 7 mm, the height of the second engaging groove 421 is 6 mm, and the width of the second engaging groove 421 is 3 mm.

[0080] Furthermore, a length L4 of the second engaging buckle 411 is in a range from 1 mm to 150 mm, a height H4 of the second engaging buckle 411 is in a range from 1 mm to 40 mm, and a width D4 of the second engaging buckle 411 is in a range from 1 mm to 30 mm. Preferably, the length of the second engaging buckle 411 is 6 mm, the height of the second engaging buckle 411 is 5 mm, and the width of the second engaging buckle 411 is 3 mm.

[0081] In this embodiment, a length L5 of the first insertion member 34 is in a range from 1 mm to 150 mm, a height H5 of the first insertion member 34 is in a range from 3 mm to 150 mm, and a width D5 of the first insertion member 34 is in a range from 1 mm to 30 mm. Preferably, the length of the first insertion member 34 is 49.76 mm, the height of the first insertion member 34 is 29.03 mm, and the width of the first insertion member 34 is 3 mm.

[0082] Furthermore, a length L6 of the first insertion groove 33 is in a range from 1 mm to 150 mm, a height H6 of the first insertion groove 33 is in a range from 3 mm to 150 mm, and a width D6 of the first insertion groove 33 is in a range from 1 mm to 30 mm. Preferably, the length of the first insertion groove 33 is 51.37 mm, the height of the first insertion groove 33 is 29.29 mm, and the width of the first insertion groove 33 is 1.5 mm.

[0083] Furthermore, similarly, the first insertion member 34 and the second insertion member 35 are identical in length, height, and width. The first insertion groove 33 and the second insertion groove 36 are identical in length, height, and width.

[0084] In this embodiment, the lumbar support portion 2 includes an upper edge 21, a lower edge 22, a first left edge 23, and a first right edge 24. The upper edge 21 and the lower edge 22 are arranged opposite each other. The first left edge 23 and the first right edge 24 are connected to the upper edge 21 and the lower edge 22, and are arranged opposite each other. A relative length of the upper edge 21 is less than a maximum relative length between the first left edge 23 and the first right edge 24. Specifically, the first left edge 23 is an arc-shaped edge, and the first right edge 24 is an arc-shaped edge.

[0085] In this embodiment, a maximum relative length L7 between the first left edge 23 and the first right edge 24 is in a range from 400 mm to 450 mm. Preferably, the maximum relative length between the first left edge 23 and the first right edge 24 is 432.46 mm. A relative length L8 of the upper edge 21 is in a range from 250 mm to 300 mm. Preferably, the relative length of the upper edge 21 is 272 mm.

[0086] In this embodiment, the hip support portion 1 includes a front edge 11, a rear edge 12, a second left edge 13, and a second right edge 14. The front edge 11 and the rear edge 12 are arranged opposite each other. The second left edge 13 and the second right edge 14 are connected to the front edge 11 and the rear edge 12, and are arranged opposite each other. The second left edge 13 and the second right edge 14 are positioned on an identical horizontal line. The hip support portion 1 also includes a top surface 15 and a bottom surface 16. The top surface 15 and the bottom surface 16 are arranged opposite to each other. A relative distance H7 between a maximum height of the second left edge 13 and the second right edge 14 and a minimum height of the bottom surface 16 is in a range from 80 mm to 100 mm. Preferably, the relative distance between the maximum height of the second left edge 13 and the second right edge 14 and the minimum height of the bottom surface 16 is 91.4 mm.

[0087] In this embodiment, the front edge 11 includes a first segment front edge 111, a second segment front edge 112, and a third segment front edge 113. The second segment front edge 112 is positioned between the first segment front edge 111 and the third segment front edge 113. The first segment front edge 111, the second segment front edge 112, and the third segment front edge 113 are all arc-shaped edges. The first segment front edge 111 and the third segment front edge 113 are concave arc-shaped edges, while the second segment front edge 112 is an upward convex arc-shaped edge.

[0088] In this embodiment, the hip support portion 1 is provided with a plurality of first heat dissipation holes 101. The plurality of first heat dissipation holes 101 are symmetrically arranged on the hip support portion 1. A second flexible pad body 105 is provided with a plurality of second heat dissipation holes 106. The first heat dissipation holes 101 and the second heat dissipation holes 106 are matched in position and size. Through the above structure, a heat dissipation effect of the hip support portion 1 is effectively achieved, preventing discomfort caused by heat accumulation, and keeping the chair refreshing and comfortable.

[0089] In this embodiment, the hip support portion 1 is provided with a partition protrusion 102. The partition protrusion 102 and a left end of the hip support portion 1 form a concave first leg support groove 103. The partition protrusion 102 and a right end of the hip support portion 1 form a concave second leg support groove 104. The lumbar support portion 2 includes a left lumbar support plate 201, a middle lumbar support plate 202, and a right lumbar support plate 203. The left lumbar support plate 201 and the right lumbar support plate 203 are symmetrically arranged and both protrude on one side towards a user. Through the above structure, the forming of the first leg support groove 103 and the second leg support groove 104 enables the chair to better adapt to the user's body shape, making it more fitting to sit, optimize the fit of the chair, and improve the overall supporting effect, so that the user can obtain a comfortable experience in various sitting postures.

[0090] In this embodiment, the lumbar support portion 2 is also provided with a first handle hole 204. The first handle hole 204 is defined in an upper end away from the hip support portion 1. One surface of the lumbar support portion 2 facing a user is connected to a first flexible pad body 205. The lumbar support portion 2 is provided with the first handle hole 204, and the first flexible pad body 205 is provided with a second handle hole 206. The first handle hole 204 and the second handle hole 206 are matched in position and size. The first flexible pad body 205 is formed by a plurality of sponge blocks. Each of the sponge blocks is separated by a first heat dissipation groove. One surface of the hip support portion facing the user is connected with the second flexible pad body 105. The second flexible pad body 105 is formed by a plurality of sponge blocks. Each of the sponge blocks is separated by a second heat dissipation groove. The hip support portion is provided with the plurality of first heat dissipation holes, and the second flexible pad body 105 is provided with the plurality of second heat dissipation holes 106. The first heat dissipation holes and the second heat dissipation holes 106 are matched in position and size.Embodiment Two

[0091] Referring to FIGS. 15-16, the difference between this embodiment and embodiment one lies only in the connection method and structure between the lumbar support portion 2 and the hip support portion 1. Specific details are as follows.

[0092] In this embodiment, the first locking member 31 includes an insertion groove portion 300 and a position limiting member 310. The insertion groove portion 300 and the position limiting member 310 are both positioned at a bottom of the hip support portion 1. The insertion groove portion 300 includes a third insertion groove 320 and a plurality of insertion foot grooves 330. The third insertion groove 320 is in communication with the plurality of insertion foot grooves 330. The first locking fitting member 32 is a transverse insertion portion 5 connected to a bottom end of the lumbar support portion 2. The transverse insertion portion 5 includes a third insertion member 51 and a plurality of insertion feet 52. The third insertion member 51 is matched with the third insertion groove 320. The insertion feet 52 are connected to the third insertion member 51 and are matched with the insertion foot grooves 330. The position limiting member 310 is connected to a left side and a right side of the hip support portion 1, and covers the insertion foot grooves 330. The position limiting member 310 is used for limiting the transverse insertion portion 5 within the insertion groove portion 300.

[0093] Alternatively, the first locking member 31 includes an insertion groove portion 300 and a position limiting member 310. The insertion groove portion 300 and the position limiting member 310 are both positioned at a bottom of the lumbar support portion 2. The insertion groove portion 300 includes a third insertion groove 320 and a plurality of insertion foot grooves 330. The third insertion groove 320 is in communication with the plurality of insertion foot grooves 330. The first locking fitting member 32 is a transverse insertion portion 5 connected to a bottom end of the hip support portion 1. The transverse insertion portion 5 includes a third insertion member 51 and a plurality of insertion feet 52. The third insertion member 51 is matched with the third insertion groove 320. The insertion feet 52 are connected to the third insertion member 51 and are matched with the insertion foot grooves 330. The position limiting member 310 is connected to a left side and a right side of the lumbar support portion 2, and covers the insertion foot grooves 330. The position limiting member 310 is used for limiting the transverse insertion portion 5 within the insertion groove portion 300.Embodiment Three

[0094] Referring to FIGS. 17-18, the only difference between this embodiment and embodiment one is the connection method and structure between the lumbar support portion 2 and the hip support portion 1. Specific details are as follows.

[0095] In this embodiment, the first locking member 31 includes an insertion end 6, a first position limiting groove 61, and a second position limiting groove 62. The insertion end 6 is provided on the hip support portion 1. The first position limiting groove 61 and the second position limiting groove 62 are opposite and are respectively defined in an upper side and a lower side of the hip support portion 1. The first locking fitting member 32 includes a transverse connecting portion 7 connected to a bottom end of the lumbar support portion 2. The transverse connecting portion 7 is provided with an upper position limiting member 71 and a lower position limiting member 72. The upper position limiting member 71 and the lower position limiting member 72 jointly surround and form an insertion space. A gap is defined between one end of the upper position limiting member 71 and one end of the lower position limiting member 72, so that the upper position limiting member 71 is formed with a first position limiting protrusion 711 matching the first position limiting groove 61, and the lower position limiting member 72 is formed with a second position limiting protrusion 721 matching the second position limiting groove 62. The first locking member 31 is clamped into the first locking fitting member 32 along a direction in which the first locking member 31 is distributed, so that the hip support portion 1 is connected to the lumbar support portion 2.

[0096] Alternatively, the first locking member 31 includes an insertion end 6, a first position limiting groove 61 and a second position limiting groove 62. The insertion end 6 is provided on the lumbar support portion 2. The first position limiting groove 61 and the second position limiting groove 62 are opposite and are respectively defined in an upper side and a lower side of the lumbar support portion 2. The first locking fitting member 32 includes a transverse connecting portion 7 connected to a bottom end of the hip support portion 1. The transverse connecting portion 7 is provided with an upper position limiting member 71 and a lower position limiting member 72. The upper position limiting member 71 and the lower position limiting member 72 jointly surround and form an insertion space. A gap is defined between one end of the upper position limiting member 71 and one end of the lower position limiting member 72, so that the upper position limiting member 71 is formed with a first position limiting protrusion 711 matching the first position limiting groove 61, and the lower position limiting member 72 is formed with a second position limiting protrusion 721 matching the second position limiting groove 62. The first locking member 31 is clamped into the first locking fitting member 32 along a direction in which the first locking member 31 is distributed, so that the lumbar support portion 2 is connected to the hip support portion 1.Embodiment Four

[0097] Referring to FIGS. 19-21, the only difference between this embodiment and embodiment one is the connection method and structure between the lumbar support portion 2 and the hip support portion 1. Specific details are as follows.

[0098] In this embodiment, the hip support portion 1 is connected to a vertical connecting portion 8. The first locking member 31 includes a plurality of first clamping blocks 81 provided at the vertical connecting portion 8. The first locking fitting member 32 includes first clamping cavities 9. The first clamping cavities 9 are defined in one end of the lumbar support portion 2 connected to the vertical connecting portion 8, and are matched with the first clamping blocks 81. The second locking member 41 includes second clamping blocks 91 positioned at the end of the lumbar support portion 2 connected to the vertical connecting portion 8. The second locking fitting member 42 includes second clamping cavities 82 defined in the vertical connecting portion 8 and matched with the second clamping blocks 91. The first clamping blocks 81 and the second clamping cavities 82 are arranged in a staggered manner, and the second clamping blocks 91 and the first clamping cavities 9 are arranged in a staggered manner.

[0099] Alternatively, the lumbar support portion 2 is connected to a vertical connecting portion 8. The first locking member 31 includes a plurality of first clamping blocks 81 provided at the vertical connecting portion 8. The first locking fitting member 32 includes first clamping cavities 9. The first clamping cavities 9 are defined in one end of the hip support portion 1 connected to the vertical connecting portion 8, and are matched with the first clamping blocks 81. The second locking member 41 includes second clamping blocks 91 positioned at the end of the hip support portion 1 connected to the vertical connecting portion 8. The second locking fitting member 42 includes second clamping cavities 82 defined in the vertical connecting portion 8 and matched with the second clamping blocks 91. The first clamping blocks 81 and the second clamping cavities 82 are arranged in a staggered manner, and the second clamping blocks 91 and the first clamping cavities 9 are arranged in a staggered manner.Embodiment Five

[0100] Referring to FIGS. 22-23, the only difference between this embodiment and embodiment one is the connection method and structure between the lumbar support portion 2 and the hip support portion 1. Specific details are as follows.

[0101] In this embodiment, the first locking member 31 includes a plurality of first locking holes 301 defined in the hip support portion 1. The lumbar support portion 2 is equipped with a transverse connecting portion 7. The second locking member 41 includes a plurality of second locking holes 401 defined in the transverse connecting portion 7. A screw is capable of passing through the first locking hole 301 and the second locking hole 401 to fix and lock the transverse connecting portion 7 to the hip support portion 1.

[0102] Alternatively, the first locking member 31 includes a plurality of first locking holes 301 defined in the lumbar support portion 2. The hip support portion 1 is equipped with a transverse connecting portion 7. The second locking member 41 includes a plurality of second locking holes 401 defined in the transverse connecting portion 7. A screw is capable of passing through the first locking hole 301 and the second locking hole 401 to fix and lock the transverse connecting portion 7 to the lumbar support portion 2.

[0103] The above description only describes embodiments of the present disclosure, and is not intended to limit the present disclosure; various modifications and changes can be made to the present disclosure. Any modifications, equivalent substitutions, and improvements made within the spirit and scope of the present disclosure are intended to be included within the scope of the present disclosure.

Claims

1. A lumbar support chair, comprising:a hip support portion used for supporting at least one part of a hip and at least one part of a leg of a user;a lumbar support portion used for supporting at least one part of a waist of the user; anda first locking device, wherein the hip support portion is detachably connected to the lumbar support portion through the first locking device.

2. The lumbar support chair according to claim 1, further comprising a second locking device, wherein the hip support portion and the lumbar support portion are detachably connected through the first locking device and the second locking device.

3. The lumbar support chair according to claim 1, wherein the first locking device comprises a first locking member and a first locking fitting member; the first locking member is positioned at the hip support portion; the first locking fitting member is positioned at the lumbar support portion; and the first locking member is connected to the first locking fitting member, so that the hip support portion is locked and fixed to the lumbar support portion;alternatively, the first locking member is positioned at the lumbar support portion; and the first locking fitting member is positioned at the hip support portion.

4. The lumbar support chair according to claim 1, wherein the hip support portion and the lumbar support portion are detachably connected by a buckle, a rivet, a screw, a suction member, an adhesive, a bolt, a rope, a pin, or a clamp; and the suction member is a magnet or a suction cup.

5. The lumbar support chair according to claim 3, wherein the first locking member comprises at least one first engaging buckle; the first locking fitting member comprises at least one first engaging groove; and the first engaging buckle is engaged with the first engaging groove, so that the hip support portion is locked and fixed to the lumbar support portion.

6. The lumbar support chair according to claim 5, wherein one end of the lumbar support portion connected to the hip support portion is concavely provided with at least one first insertion groove; at least one of the first insertion grooves is provided with the first engaging groove; one end of the hip support portion connected to the lumbar support portion is convexly provided with at least one first insertion member; at least one first insertion member is provided with the first engaging buckle; and when the first insertion member is inserted into the first insertion groove, the first engaging buckle is engaged with the first engaging groove.

7. The lumbar support chair according to claim 2, wherein the first locking device comprises a first locking member and a first locking fitting member; the first locking member is positioned at the hip support portion; the first locking fitting member is positioned at the lumbar support portion; the second locking device comprises a second locking member and a second locking fitting member; the second locking member is positioned at the lumbar support portion; the second locking fitting member is positioned at the hip support portion; the second locking member is connected to the second locking fitting member; and the first locking member is connected to the first locking fitting member, so that the hip support portion is locked and fixed to the lumbar support portion.

8. The lumbar support chair according to claim 7, wherein the first locking member comprises at least one first engaging buckle; the first locking fitting member comprises at least one first engaging groove; the first engaging buckle is engaged with the first engaging groove, so that the hip support portion is locked and fixed to the lumbar support portion; the second locking member comprises at least one second engaging buckle; the second locking fitting member comprises at least one second engaging groove; and the second engaging buckle is engaged with the second engaging groove, so that the hip support portion is locked and fixed to the lumbar support portion.

9. The lumbar support chair according to claim 8, wherein one end of the lumbar support portion connected to the hip support portion is concavely provided with at least one first insertion groove; at least one of the first insertion grooves is provided with the first engaging groove; one end of the hip support portion connected to the lumbar support portion is convexly provided with at least one first insertion member; at least one first insertion member is provided with the first engaging buckle; when the first insertion member is inserted into the first insertion groove, the first engaging buckle is engaged with the first engaging groove; the end of the lumbar support portion connected to the hip support portion is convexly provided with at least one second insertion member; at least one of the second insertion members is provided with the second engaging buckle; the end of the hip support portion connected to the lumbar support portion is concavely provided with at least one second insertion groove; at least one of the second insertion grooves is provided with the second engaging groove; and when the second insertion member is inserted into the second insertion groove, the second engaging buckle is engaged with the second engaging groove.

10. The lumbar support chair according to claim 6, wherein the first engaging buckle is positioned on one side of the first insertion member near a hip of a user; and the first insertion groove is positioned in one side of the lumbar support portion away from a waist of the user.

11. The lumbar support chair according to claim 8, wherein the first engaging buckle is positioned on one side of the first insertion member near a hip of a user; the first insertion groove is positioned in one side of the lumbar support portion away from a waist of the user; the second engaging buckle is positioned on one side of the second insertion member near the waist of the user; and the second insertion groove is positioned in one side of the hip support portion away from the hip of the user.

12. The lumbar support chair according to claim 6, wherein the hip support portion is convexly provided with at least two first insertion members; the lumbar support portion is concavely provided with at least two first insertion grooves; and one side of the hip support portion away from a hip of a user is provided with a first reinforcing rib extending from the first insertion member.

13. The lumbar support chair according to claim 9, wherein the hip support portion is convexly provided with at least two first insertion members; the lumbar support portion is concavely provided with at least two first insertion grooves; the hip support portion is concavely provided with at least two second insertion grooves; the lumbar support portion is convexly provided with at least two second insertion member; one side of the hip support portion away from a hip of a user is provided with a first reinforcing rib extending downward from the first insertion member; and one side of the lumbar support portion away from a waist of the user is provided with a second reinforcing rib extending upward from the second insertion member.

14. The lumbar support chair according to claim 9, wherein the first insertion members and the second insertion grooves are arranged in a staggered manner; and the first insertion grooves and the second insertion members are arranged in a staggered manner.

15. The lumbar support chair according to claim 3, wherein the first locking member comprises an insertion groove portion and a position limiting member; the insertion groove portion and the position limiting member are both positioned at a bottom of the hip support portion; the insertion groove portion comprises a third insertion groove and a plurality of insertion foot grooves; the third insertion groove is in communication with the plurality of insertion foot grooves; the first locking fitting member is a transverse insertion portion connected to a bottom end of the lumbar support portion; the transverse insertion portion comprises a third insertion member and a plurality of insertion feet; the third insertion member is matched with the third insertion groove; the insertion feet are connected to the third insertion member and are matched with the insertion foot grooves; the position limiting member is connected to a left side and a right side of the hip support portion, and covers the insertion foot grooves; and the position limiting member is used for limiting the transverse insertion portion within the insertion groove portion;alternatively, the first locking member comprises an insertion groove portion and a position limiting member; the insertion groove portion and the position limiting member are both positioned at a bottom of the lumbar support portion; the insertion groove portion comprises a third insertion groove and a plurality of insertion foot grooves; the third insertion groove is in communication with the plurality of insertion foot grooves; the first locking fitting member is a transverse insertion portion connected to a bottom end of the hip support portion; the transverse insertion portion comprises a third insertion member and a plurality of insertion feet; the third insertion member is matched with the third insertion groove; the insertion feet are connected to the third insertion member and are matched with the insertion foot grooves; the position limiting member is connected to a left side and a right side of the lumbar support portion, and covers the insertion foot grooves; and the position limiting member is used for limiting the transverse insertion portion within the insertion groove portion.

16. The lumbar support chair according to claim 3, wherein the first locking member comprises an insertion end, a first position limiting groove, and a second position limiting groove; the insertion end is provided on the hip support portion; the first position limiting groove and the second position limiting groove are opposite and are respectively defined in an upper side and a lower side of the hip support portion; the first locking fitting member comprises a transverse connecting portion connected to a bottom end of the lumbar support portion; the transverse connecting portion is provided with an upper position limiting member and a lower position limiting member; the upper position limiting member and the lower position limiting member jointly surround and form an insertion space; a gap is defined between one end of the upper position limiting member and one end of the lower position limiting member, so that the upper position limiting member is formed with a first position limiting protrusion matching the first position limiting groove, and the lower position limiting member is formed with a second position limiting protrusion matching the second position limiting groove; and the first locking member is clamped into the first locking fitting member along a direction in which the first locking member is distributed, so that the hip support portion is connected to the lumbar support portion;alternatively, the first locking member comprises an insertion end, a first position limiting groove and a second position limiting groove; the insertion end is provided on the lumbar support portion; the first position limiting groove and the second position limiting groove are opposite and are respectively defined in an upper side and a lower side of the lumbar support portion; the first locking fitting member comprises a transverse connecting portion connected to a bottom end of the hip support portion; the transverse connecting portion is provided with an upper position limiting member and a lower position limiting member; the upper position limiting member and the lower position limiting member jointly surround and form an insertion space; a gap is defined between one end of the upper position limiting member and one end of the lower position limiting member, so that the upper position limiting member is formed with a first position limiting protrusion matching the first position limiting groove, and the lower position limiting member is formed with a second position limiting protrusion matching the second position limiting groove; and the first locking member is clamped into the first locking fitting member along a direction in which the first locking member is distributed, so that the lumbar support portion is connected to the hip support portion.

17. The lumbar support chair according to claim 7, wherein the hip support portion is connected to a vertical connecting portion; the first locking member comprises a plurality of first clamping blocks provided at the vertical connecting portion; the first locking fitting member comprises first clamping cavities; the first clamping cavities are defined in one end of the lumbar support portion connected to the vertical connecting portion, and are matched with the first clamping blocks; the second locking member comprises second clamping blocks positioned at the end of the lumbar support portion connected to the vertical connecting portion; the second locking fitting member comprises second clamping cavities defined in the vertical connecting portion and matched with the second clamping blocks; the first clamping blocks and the second clamping cavities are arranged in a staggered manner; and the second clamping blocks and the first clamping cavities are arranged in a staggered manner;alternatively, the lumbar support portion is connected to a vertical connecting portion; the first locking member comprises a plurality of first clamping blocks provided at the vertical connecting portion; the first locking fitting member comprises first clamping cavities; the first clamping cavities are defined in one end of the hip support portion connected to the vertical connecting portion, and are matched with the first clamping blocks; the second locking member comprises second clamping blocks positioned at the end of the hip support portion connected to the vertical connecting portion; the second locking fitting member comprises second clamping cavities defined in the vertical connecting portion and matched with the second clamping blocks; the first clamping blocks and the second clamping cavities are arranged in a staggered manner; and the second clamping blocks and the first clamping cavities are arranged in a staggered manner.

18. The lumbar support chair according to claim 7, wherein the first locking member comprises a plurality of first locking holes defined in the hip support portion; the lumbar support portion is equipped with a transverse connecting portion; the second locking member comprises a plurality of second locking holes defined in the transverse connecting portion; and a screw is capable of passing through the first locking hole and the second locking hole to fix and lock the transverse connecting portion to the hip support portion;alternatively, the first locking member comprises a plurality of first locking holes defined in the lumbar support portion; the hip support portion is equipped with a transverse connecting portion; the second locking member comprises a plurality of second locking holes defined in the transverse connecting portion; and a screw is capable of passing through the first locking hole and the second locking hole to fix and lock the transverse connecting portion to the lumbar support portion.

19. The lumbar support chair according to claim 10, wherein a length of the first engaging groove is in a range from 1 mm to 150 mm; a height of the first engaging groove is in a range from 1 mm to 40 mm; and a width of the first engaging groove is in a range from 1 mm to 30 mm;a length of the first engaging buckle is in a range from 1 mm to 150 mm; a height of the first engaging buckle is in a range from 1 mm to 40 mm; and a width of the first engaging buckle is in a range from 1 mm to 30 mm;a length of the first insertion member is in a range from 1 mm to 150 mm; a height of the first insertion member is in a range from 3 mm to 150 mm; and a width of the first insertion member is in a range from 1 mm to 30 mm;a length of the first insertion groove is in a range from 1 mm to 150 mm; a height of the first insertion groove is in a range from 3 mm to 150 mm; and a width of the first insertion groove is in a range from 1 mm to 30 mm.

20. The lumbar support chair according to claim 1, wherein the hip support portion is provided with a partition protrusion; the partition protrusion and a left end of the hip support portion form a concave first leg support groove; the partition protrusion and a right end of the hip support portion form a concave second leg support groove; the lumbar support portion comprises a left lumbar support plate, a middle lumbar support plate, and a right lumbar support plate; the left lumbar support plate and the right lumbar support plate are symmetrically arranged and both protrude on one side towards the user; the lumbar support portion is also provided with a first handle hole; the first handle hole is defined in an upper end away from the hip support portion; one surface of the lumbar support portion facing the user is connected to a first flexible pad body; the lumbar support portion is provided with the first handle hole; the first flexible pad body is provided with a second handle hole; the first handle hole and the second handle hole are matched in position and size; the first flexible pad body is formed by a plurality of sponge blocks; each of the sponge blocks is separated by a first heat dissipation groove; one surface of the hip support portion facing the user is connected with a second flexible pad body; the second flexible pad body is formed by a plurality of sponge blocks; each of the sponge blocks is separated by a second heat dissipation groove; the hip support portion is provided with a plurality of first heat dissipation holes; the second flexible pad body is provided with a plurality of second heat dissipation holes; and the first heat dissipation holes and the second heat dissipation holes are matched in position and size.

Images