A backrest frame netting structure and a chair

Abstract

The utility model relates to the field of seat, disclose a kind of waist and back frame net structure and chair, can adopt single cloth to cover and be fixed in backrest and waist rest simultaneously, both realize the synchronous protection of backrest, waist rest.The utility model includes support;Backrest, be located in support, and the side wall of backrest is equipped with first installation groove;Waist rest, be located in support, and the side wall of waist rest is equipped with second installation groove;Rotary connecting portion, one end is connected backrest, the other end is connected waist rest, and rotary connecting portion is equipped with connecting channel, and first installation groove, connecting channel, second installation groove are interconnected and set.

Description

Technical Field

[0001] This utility model relates to the field of seating, and in particular to a lumbar support frame mesh structure and a chair. Background Technology

[0002] In the field of seating, to balance support and comfort, lumbar support structures typically consist of a frame, backrest, lumbar support, and mesh fabric. The frame serves as the basic load-bearing component, providing an installation reference for the backrest and lumbar support. The backrest and lumbar support correspond to the back and waist areas of the human body, respectively, and achieve flexible support by working with the mesh fabric, avoiding discomfort caused by direct contact between hard structures and the human body. In existing technologies, the assembly method of mesh fabric with backrests and lumbar supports generally adopts an "independent installation" design: that is, the side wall of the backrest has a separate first mounting groove, and the side wall of the lumbar support has a separate second mounting groove. The mesh fabric is cut into two independent sheet-like structures, which are respectively embedded into the first mounting groove of the backrest or the second mounting groove of the lumbar support, thus achieving only the coverage and fixation of a single component (backrest or lumbar support). This design has been widely adopted by the industry for a long time due to its simple processing flow and strong component versatility. Utility Model Content

[0003] This utility model aims to solve at least one of the technical problems existing in the prior art. To this end, this utility model proposes a backrest frame mesh structure that can use a single mesh fabric to simultaneously cover and fix to the backrest and lumbar support, thus achieving simultaneous protection for both the backrest and lumbar support.

[0004] This utility model also proposes a chair with the above-mentioned backrest frame mesh structure.

[0005] On one hand, the back frame mesh structure according to an embodiment of the present utility model includes: The backrest has a first mounting groove on its side wall; The lumbar support has a second mounting groove on its side wall; The rotating connecting part has one end connected to the backrest and the other end connected to the lumbar support. The rotating connecting part is provided with a connecting channel, and the first mounting groove, the connecting channel, and the second mounting groove are interconnected.

[0006] According to some embodiments of the present invention, a mesh fabric is also included, which is embedded in the groove structure of the backrest and the waist rest along the first mounting groove, the second mounting groove and the connecting channel.

[0007] According to some embodiments of the present invention, the inner wall of the first mounting groove is provided with a plurality of first protrusions, which are arranged sequentially along the extension direction of the first mounting groove. The inner wall of the second mounting groove is provided with a plurality of second protrusions, which are arranged sequentially along the extension direction of the second mounting groove.

[0008] According to some embodiments of the present invention, the first mounting groove sequentially includes a first bent portion, a first mounting portion, and a second bent portion. The first mounting portion is disposed along the back side wall, and the first bent portion and the second bent portion are bent toward the rotating connection portion. Both the first bent portion and the second bent portion are connected to the rotating connection portion.

[0009] According to some embodiments of the present invention, the second mounting groove sequentially includes a third bending portion, a second mounting portion and a fourth bending portion. The second mounting portion is disposed along the side wall of the waist rest. The third bending portion and the fourth bending portion are bent toward the rotating connection portion. Both the third bending portion and the fourth bending portion are connected to the rotating connection portion.

[0010] According to some embodiments of the present invention, it also includes a bracket, the backrest is vertically connected to the bracket, the lumbar support is located below the backrest and rotatably connected to the backrest, and it also includes a lumbar support member, one end of which is hinged to the bracket and the other end of which is hinged to the lumbar support member.

[0011] According to some embodiments of the present invention, the lumbar support includes at least two support shafts, one end of which is hinged to the bracket and the other end is hinged to both sides of the lumbar support.

[0012] According to some embodiments of the present invention, the lumbar support includes a first support rod, a second support rod, and a first elastic member. The first support rod and the second support rod are slidable relative to each other. One end of the first elastic member is connected to the first support rod, and the other end of the first elastic member is connected to the second support rod. The first support rod is hinged to the lumbar support, and the second support rod is hinged to the bracket.

[0013] According to some embodiments of the present invention, the bracket is provided with a waist adjustment plate, the waist adjustment plate is provided with a plurality of mounting positions arranged from top to bottom, and the waist support member can be selectively connected to any of the mounting positions.

[0014] On the other hand, the chair according to the present invention includes the backrest frame mesh structure according to the above embodiments of the present invention.

[0015] The embodiments of this utility model have at least the following beneficial effects: In traditional independent installation methods, the connection area between the backrest and lumbar support is prone to creating a "protective break" due to the lack of mesh fabric coverage. During daily use, the brackets, foam, and other components in this area are easily worn down by friction and dust intrusion. In this design, the mesh fabric runs through the connecting channel of the rotating joint between the backrest and lumbar support, completely covering the connection gap. This effectively isolates external impurities and avoids the human body from contacting the hard edge structure at the connection point, reducing the risk of localized wear and scratches and extending the service life of the seat's core components.

[0016] Traditional chairs typically have independent backrests and lumbar supports, which are prone to slight misalignment or wobbling under stress (such as the lumbar support shifting when the user leans back). This design connects the two supports via a mesh fabric, forming a unified stress-bearing support unit. When the user applies pressure to their back, the mesh fabric evenly distributes the pressure to the backrest and lumbar support, preventing excessive stress on any single component. It also limits the relative displacement between the two supports, improving the overall structural rigidity and stability of the chair. Even inexpensive mesh fabrics with poor elasticity can maintain their tension and prevent sagging due to the excellent stretching.

[0017] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0018] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which: Figure 1 This is a schematic diagram of the overall structure of the waist and back frame mesh structure according to an embodiment of this utility model; Figure 2 This is a side view of the back frame mesh structure according to an embodiment of the present utility model; Figure 3 This is a partial structural diagram of the back frame mesh structure according to an embodiment of the present utility model; Figure 4 This is a schematic diagram of the overall structure of the waist and back frame mesh structure according to an embodiment of this utility model; Figure 5 This is a schematic diagram of the overall structure of the waist support component according to an embodiment of the present utility model; Figure label: Bracket 100; Backrest 200, first mounting groove 210, connecting channel 211, first protrusion 212, first bending part 213, first mounting part 214; Lumbar support 300, second mounting groove 310, second protrusion 312, third bending part 313, second mounting part 314; Waist support 400, first support rod 410, second support rod 420, first elastic element 430, support shaft 440. Detailed Implementation

[0019] The following will describe several embodiments of the present invention, including embodiments corresponding to the accompanying drawings. It should be understood that the drawings are used to assist in understanding the technical features and technical solutions of the present invention, and should not be construed as limiting the scope of protection of the present invention.

[0020] The following will provide a clear and complete description of the concept, specific structure, and technical effects of this utility model in conjunction with the embodiments and accompanying drawings, so as to fully understand the purpose, solution, and effects of this utility model. It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other.

[0021] It should be noted that, unless otherwise explicitly defined, when a feature is referred to as "fixed," "connected," or "installed" on another feature, it can be directly fixed or connected to the other feature, or it can be indirectly fixed or connected to the other feature. The terms "fixed," "connected," and "installed" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0022] It should be noted that the descriptions of orientations or positional relationships indicated by terms such as up, down, left, right, top, bottom, front, back, inside, and outside used in this utility model are based on the orientations or positional relationships indicated by the accompanying drawings or embodiments. They are only for the purpose of facilitating the description of this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0023] It should be noted that the term "and / or" used in this utility model includes any combination of one or more of the related listed items, "several" means one or more, "multiple" means two or more, "greater than", "less than", "exceeding" are understood to exclude the number itself, and "above", "below", "within" are understood to include the number itself.

[0024] It should be noted that the use of "first" and "second" in this utility model is only for the purpose of distinguishing technical features, and should not be construed as indicating or implying relative importance, or implicitly indicating the number of technical features indicated, or implicitly indicating the order of the technical features indicated.

[0025] It should be noted that, unless otherwise expressly defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art. The terminology used in this specification is for the purpose of describing particular embodiments only and not for limiting the scope of the invention.

[0026] Reference Figures 1-5 The basic embodiment of the first aspect of this utility model provides a back frame mesh structure, including: The back of 200 has a first mounting groove 210 on its side wall; The lumbar support 300 has a second mounting groove 310 on its side wall; The rotating connecting part has one end connected to the backrest 200 and the other end connected to the waist rest 300. The rotating connecting part is provided with a connecting channel 211. The first mounting groove 210, the connecting channel 211, and the second mounting groove 310 are interconnected.

[0027] According to embodiments of this utility model, by such a configuration, at least the following effects can be achieved: In traditional independent installation methods, the connection area between the backrest 200 and the lumbar support 300 is prone to creating a "protective break" due to the lack of mesh fabric coverage. During daily use, components such as the bracket 100 and foam in this area are easily worn due to friction and dust intrusion. In this design, the mesh fabric runs through the connecting channel 211 of the rotating connection part, completely covering the connection gap. This effectively isolates external impurities and avoids human contact with the hard edge structure at the connection point, reducing the risk of localized wear and scratches and extending the service life of the seat's core components.

[0028] Traditional chairs typically have independent backrests (200) and lumbar supports (300) that are prone to slight misalignment or wobbling under stress (e.g., the lumbar support (300) shifts under stress when the user leans back). This design connects the two components using a mesh fabric, forming a unified stress-bearing support unit. When the user applies pressure to their back, the mesh fabric evenly distributes the pressure to both the backrest (200) and lumbar support (300), preventing excessive stress on any single component and limiting their relative displacement. This improves the overall structural rigidity and stability of the chair. Even inexpensive mesh fabrics with poor elasticity can maintain their tension and prevent sagging due to the good stretching.

[0029] It should be noted that the rotating connection part includes a first rotating arm and a second rotating arm, which are rotatably connected to each other, and the connecting channel 211 is provided on the two rotating arms.

[0030] In some embodiments, a mesh fabric is also included, which is embedded in the groove structure of the backrest 200 and the lumbar support 300 along the first mounting groove 210, the second mounting groove 310, and the connecting channel 211. The edge of the mesh fabric is provided with a mounting connection structure, which can be embedded within the groove structure. The mesh fabric is no longer limited to a single backrest 200 or lumbar support 300, but rather spans the backrest 200 and lumbar support 300 by rotating the connecting channel 211, completely covering the joint gap between the two. This not only prevents dust, debris, and other impurities from intruding into the bracket 100 or its internal structure, avoiding component corrosion and frictional wear, but also eliminates direct contact between the human back and the hard edge of the joint (the edge of the mounting groove, the exposed end of the bracket 100), eliminating clothing rubbing and localized pressure discomfort, and significantly extending the service life of the core components of the seat.

[0031] In some embodiments, the inner wall of the first mounting groove 210 is provided with a plurality of first protrusions 212, which are arranged sequentially along the extending direction of the first mounting groove 210. The inner wall of the second mounting groove 310 is provided with a plurality of second protrusions 312, which are arranged sequentially along the extending direction of the second mounting groove 310. The first protrusions 212 on the inner wall of the first mounting groove 210 and the second protrusions 312 on the inner wall of the second mounting groove 310 optimize the installation stability of the mesh fabric through a "concave-convex interlocking" mechanism: the protrusions are evenly distributed along the extending direction of the mounting groove and can be embedded into the fiber gaps at the edge of the mesh fabric (or form an interlocking with the thickened layer at the edge of the mesh fabric), greatly enhancing the friction between the mesh fabric and the mounting groove. Even when the mesh fabric is stretched due to frequent leaning by the user (such as repeated adjustments of sitting posture in an office setting), the protrusions can effectively limit the displacement of the mesh fabric and prevent loosening; at the same time, the protrusions can disperse the local force on the edge of the mesh fabric, avoiding tearing of the mesh fabric due to long-term single-point stretching, and further extending the service life of the mesh fabric. Meanwhile, in terms of manufacturing process, multiple first protrusions 212 are set to facilitate the adjustment of the depth of the first mounting groove 210, and multiple second protrusions 312 are set to facilitate the adjustment of the depth of the second mounting groove 310.

[0032] In some embodiments, the first mounting groove 210 sequentially includes a first bent portion 213, a first mounting portion 214, and a second bent portion. The first mounting portion 214 is disposed along the side wall of the backrest 200, and the first bent portion 213 and the second bent portion are bent toward the rotating connection portion. Both the first bent portion 213 and the second bent portion are connected to the rotating connection portion. The second mounting groove 310 sequentially includes a third bent portion 313, a second mounting portion 314, and a fourth bent portion. The second mounting portion 314 is disposed along the side wall of the waist rest 300, and the third bent portion 313 and the fourth bent portion are bent toward the rotating connection portion. Both the third bent portion 313 and the fourth bent portion are connected to the rotating connection portion. The bent structure allows the bent portions to bend toward the rotating connection portion, enabling the mesh fabric to extend along the bent structure. The mesh fabric structure can penetrate into the gap between the backrest 200 and the waist rest 300, facilitating relative rotation between the waist rest 300 and the backrest 200. The bent section bends towards the connection point between the backrest 200 and the lumbar support 300, allowing the mesh fabric to extend along the bending trajectory into the gap between the two, forming a "seamless cover." This fills the gap blind spot in the traditional straight groove design and avoids any hanging or wrinkling of the mesh fabric at the gap, ensuring the continuity of the support surface in the lumbar and back area. The bent section is directly connected to the rotating connection, and its curvature matches the rotation trajectory of the rotating connection. When the lumbar support 300 rotates relative to the backrest 200 around the rotating connection, the mesh fabric can deform synchronously with the bent section, eliminating the risk of localized pulling or detachment from the mounting groove, ensuring the support stability and mesh fabric integrity when the lumbar and back rotate relative to each other.

[0033] In some embodiments, the system further includes a support 100, a backrest 200 that is heightably connected to the support 100, a lumbar support 300 located below the backrest 200 and rotatably connected to the backrest 200, and a lumbar support 400, one end of which is hinged to the support 100 and the other end to the lumbar support 300. The support 100 is rotatably mounted to the base via a pivot (or hinge) structure, forming the basis for seat posture adjustment. When the user sits down and leans back against the lumbar support assembly, the longitudinal pressure applied to the back drives the support 100 to tilt smoothly backward along a preset trajectory around its hinge point with the base. This tilting action does not occur independently, but rather forms a "body adaptation closed loop" with the lumbar support assembly, ensuring that the tilting process always conforms to the natural spinal curve when the body leans back, avoiding abrupt stops or posture shifts.

[0034] In the lumbar support assembly, the backrest 200 is slidably connected to the support 100 via a slide rail (or guide groove). Under the continuous pressure applied by the user's back, the backrest 200 will move smoothly downward along the slide rail. At the same time, since the lumbar support 300 is directly connected to the backrest 200 via a rotating hinge, the downward movement of the backrest 200 will be synchronously transmitted to the lumbar support 300, driving the lumbar support 300 to rotate adaptively around the hinge point of the two. This rotation is not a fixed angle, but dynamically changes with the sliding stroke of the backrest 200, ultimately ensuring that the lumbar support 300 always closely conforms to the physiological curvature of the user's waist (especially the natural lordosis of the lumbar spine), avoiding gaps between the waist and the lumbar support 300 due to the movement of the backrest 200.

[0035] In some embodiments, the lumbar support 400 includes at least two support shafts 440, one end of which is hinged to the bracket 100, and the other end is hinged to both sides of the lumbar support 300. The buffer support shafts 440 (such as a curved structure made of plastic material) combine their own micro-elasticity (slight bending deformation capability) with the curvature (conforming to the scoliosis curve of the lumbar spine). This allows them to absorb instantaneous impact forces (such as sudden force exerted on the lower back when standing up) through material toughness, and also to conform to the muscle lines on both sides of the lower back through the bending direction, achieving "surface-like wrapping support" rather than single-point pressure.

[0036] In some embodiments, the lumbar support member 400 includes a first support rod 410, a second support rod 420, and a first elastic member 430. The first support rod 410 and the second support rod 420 are slidable relative to each other. One end of the first elastic member 430 is connected to the first support rod 410, and the other end of the first elastic member 430 is connected to the second support rod 420. The first support rod 410 is hinged to the lumbar support 300, and the second support rod 420 is hinged to the bracket 100. The first support rod 410 and the second support rod 420 cooperate with each other (e.g., the second support rod 420 has a groove, and the first support rod 410 is embedded in the groove) and slide relative to each other, forming a guiding effect between them, causing the support rods to move along the extension direction of the rod portion. The compression buffer elastic member gives the overall structure elasticity, making the overall structure elastic and providing a buffering effect for lumbar support.

[0037] In some embodiments, the bracket 100 is provided with a lumbar adjustment plate, which has multiple mounting positions arranged from top to bottom, and the lumbar support 400 can be selectively connected to any of the mounting positions. The multiple mounting positions of the lumbar adjustment plate allow the lumbar support 400 to adjust its hinge height, which can accommodate users of different heights (from lower to higher body types). By selecting different mounting positions, the top support point of the lumbar support 300 can be flexibly adjusted up and down to precisely match the lumbar lordosis position of users of different body types.

[0038] It should be noted that in this specification, terms such as "one embodiment", "some embodiments", "basic embodiment", and "extended embodiment" may be used to describe several embodiments of the present invention, and the specific features, structures, materials or characteristics of the several embodiments may be combined in accordance with the principles and spirit of the present invention.

[0039] Although some embodiments of the present utility model have been shown and described in this specification, the present utility model should not be limited to the above embodiments. As long as they achieve the technical effects of the present utility model by the same or equivalent means, any changes, modifications, equivalent substitutions and equivalent variations of these embodiments within the spirit and principles disclosed in the present utility model, without departing from the principles and purpose of the present utility model, should be included within the scope of protection disclosed in the present utility model and should be considered to fall within the protection scope of the present utility model.

Claims

1. A back frame mesh structure, characterized in that, include: The backrest (200) has a first mounting groove (210) on its side wall. Lumbar support (300), the side wall of which is provided with a second mounting groove (310); The rotating connection part has one end connected to the backrest (200) and the other end connected to the lumbar support (300). The rotating connection part is provided with a connection channel (211). The first mounting groove (210), the connection channel (211), and the second mounting groove (310) are interconnected.

2. The back frame mesh structure according to claim 1, characterized in that: It also includes a mesh fabric, which is installed on the groove structure of the backrest (200) and the waist support (300) along the inner wall of the first mounting groove (210), the second mounting groove (310) and the connecting channel (211).

3. The back frame mesh structure according to claim 1, characterized in that: The inner wall of the first mounting groove (210) is provided with a plurality of first protrusions (212), and the first protrusions (212) are arranged sequentially along the extension direction of the first mounting groove (210). The inner wall of the second mounting groove (310) is provided with a plurality of second protrusions (312), and the second protrusions (312) are arranged sequentially along the extension direction of the second mounting groove (310).

4. The back frame mesh structure according to claim 1, characterized in that: The first mounting groove (210) includes a first bent portion (213), a first mounting portion (214), and a second bent portion in sequence. The first mounting portion (214) is disposed along the side wall of the backrest (200). The first bent portion (213) and the second bent portion are bent toward the rotating connection portion. Both the first bent portion (213) and the second bent portion are connected to the rotating connection portion.

5. The back frame mesh structure according to claim 1, characterized in that: The second mounting groove (310) includes a third bending portion (313), a second mounting portion (314) and a fourth bending portion in sequence. The second mounting portion (314) is arranged along the side wall of the waist support (300). The third bending portion (313) and the fourth bending portion are bent toward the rotating connection portion. Both the third bending portion (313) and the fourth bending portion are connected to the rotating connection portion.

6. The back frame mesh structure according to claim 1, characterized in that: It also includes a bracket (100), the backrest (200) is vertically connected to the bracket (100), the lumbar support (300) is located below the backrest (200) and rotatably connected to the backrest (200), and also includes a lumbar support (400), one end of the lumbar support (400) is hinged to the bracket (100), and the other end is hinged to the lumbar support (300).

7. The back frame mesh structure according to claim 6, characterized in that: The lumbar support (400) includes at least two support shafts (440), one end of which is hinged to the bracket (100), and the other end is hinged to both sides of the lumbar support (300).

8. The back frame mesh structure according to claim 6, characterized in that: The lumbar support (400) includes a first support rod (410), a second support rod (420), and a first elastic member (430). The first support rod (410) and the second support rod (420) are slidable relative to each other. One end of the first elastic member (430) is connected to the first support rod (410), and the other end of the first elastic member (430) is connected to the second support rod (420). The first support rod (410) is hinged to the lumbar support (300), and the second support rod (420) is hinged to the bracket (100).

9. The back frame mesh structure according to claim 6, characterized in that: The bracket (100) is provided with a waist adjustment plate, which has multiple mounting positions arranged from top to bottom, and the waist support (400) can be selectively connected to any of the mounting positions.

10. A chair, characterized in that: Includes the waist-back frame mesh structure as described in any one of claims 1 to 9.

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