Method for improving waist support elasticity of seat

Abstract

The invention discloses a method for improving the waist supporting elasticity of a seat, which comprises the following steps: 1, configuring the seat: a waist rest unit comprises a waist supporting piece positioned on the front side and an elastic supporting plate positioned on the rear side, and the elastic supporting plate has elastic deformation capability; the bottom end of the fixing frame is connected to the chair seat unit, and the elastic supporting plate is hinged to the fixing frame; a linkage mechanism is arranged between the chair back unit and the elastic supporting plate; the using method comprises the steps that S1, the posture of the seat is adjusted, and when the seat is switched from the sitting state to the lying state, the chair back unit leans backwards and drives the elastic supporting plate to rotate backwards through the linkage mechanism to generate elastic deformation, so that relative rotation and relative movement are generated between the waist leaning unit and the chair back unit, and the waist leaning unit is more forwards jacked relative to the chair back unit; s2, the seat is used, the elastic supporting plate further rotates backwards and generates elastic deformation after bearing the leaning force, and the waist supporting piece is ejected forwards to be attached to the curve of the waist of the user under the action of the reset elastic force of the elastic supporting plate.

Description

Technical Field

[0001] This invention relates to the field of seating technology, and more specifically to a method for improving the elasticity of lumbar support in seating. Background Technology

[0002] To improve lumbar support, existing chairs typically include a lumbar support on the backrest. This lumbar support can be adjusted in tilt or depth relative to the backrest to accommodate users of different body types. However, the human lumbar curve changes with different postures. In a sitting position, the lumbar curve is S-shaped, while in a reclining position, it is roughly straight. Traditional office chairs cannot achieve this change in backrest support curve when switching between sitting and reclining positions. In a reclining position, the lumbar support cannot provide continuous and complete support, leaving the user's lower back unsupported and resulting in poor comfort.

[0003] To address the aforementioned issues, the inventor previously filed a patent providing a method for improving lumbar support in seating (application number: CN202410338837.0). This method involves rotatably connecting a back support to the underside of the chair seat, rotatably connecting a lumbar support to the chair seat, and separately rotatably connecting the lumbar support and back support to the chair seat, with the rotatable connection point between the lumbar support and the chair seat designated as the first hinge point. The lumbar support and back support are configured to rotate and move relative to each other, with the rotation point between them designated as the second hinge point. When the back support rotates backward relative to the chair seat, the lumbar support moves synchronously, rotating relative to the chair seat and rotating and moving relative to the back support. During this process, the angle between the lumbar support and back support decreases, the first hinge point is not located, and the second hinge point is located further away from the back support. This method allows the lumbar support and back support to conform to different curves of the human body in different states.

[0004] In the spirit of continuous improvement in research and development, the inventors have discovered the following areas for optimization in the above solution: 1. The back support and lumbar support are set to move relative to each other through a moving part. When the seat enters the initial or reclining state, the positions of the back support and the moving part are fixed and will not continue to move. This also makes the position of the lumbar support relatively fixed and will not move further. However, for users of different body types, the width and curvature of their waists vary to some extent, and the lumbar support may not perfectly fit the user's waist; 2. When the user sits, only the lumbar support undergoes elastic deformation, resulting in relatively small elastic support force on the user's waist, which has room for optimization; 3. Current consumers have increasingly higher requirements for the aesthetics of seats and expect seats to provide richer visual effects. However, the lumbar support structure of the above solution is relatively simple, making the seat appear rather flimsy. Summary of the Invention

[0005] In view of the above-mentioned defects or deficiencies in the prior art, it is desirable to provide a method for elastic lumbar support in seating. The elastic support plate has elastic deformation capability, which allows the lumbar support to rotate further backward to a position that conforms to the curve of the user's waist. In addition to the elasticity of the lumbar support itself, the lumbar support applies a more elastic support force to the user's waist with the help of the restoring elasticity of the elastic support plate. Moreover, the elastic support plate is installed on the rear side of the lumbar support, making the lumbar support unit structure thick and with good overall integrity and clear outline lines, thereby improving the aesthetics of the seating.

[0006] The effects of this invention are achieved as follows: This application provides a method for improving the elasticity of lumbar support in seating, including the following steps: I. Seating Configuration: The seating includes a seat unit, a lumbar support unit, a backrest unit, and a fixing frame. The lumbar support unit includes a lumbar support component at the front and an elastic support plate at the rear, which has elastic deformation capability. The bottom end of the fixing frame is connected to the seat unit, and the elastic support plate is hinged to the fixing frame, allowing the lumbar support unit to rotate relative to the seat unit. The backrest unit and the seat unit are rotatably arranged relative to each other, and a linkage mechanism is provided between the backrest unit and the elastic support plate. II. Instructions for use: S1. Adjust the posture of the seat. The seat includes a sitting position and a reclining position. When switching from the sitting position to the reclining position, the backrest unit tilts back and drives the elastic support plate to rotate backward through the linkage mechanism and generate elastic deformation, so that the lumbar support unit and the backrest unit generate relative rotation and relative movement, so that the lumbar support unit pushes forward more relative to the backrest unit. S2. When using the seat, the seat unit supports the user's buttocks, and the lumbar support unit supports the user's waist. After being supported, the elastic support plate rotates further backward and produces elastic deformation. Under the restoring elastic force of the elastic support plate, the lumbar support piece pushes forward to conform to the curve of the user's waist.

[0007] Furthermore, the linkage mechanism includes a linkage rod, the front end of which is hinged to an elastic support plate, and the rear end of which is hinged to the chair back unit. In step S1, when the chair back unit reclines, the linkage rod is driven to move backward by the chair back unit, and the linkage rod pulls the elastic support plate backward, thereby causing the elastic support plate to rotate backward and generate elastic deformation. The elastic support plate can move synchronously with the chair back unit, making the rotation adjustment operation of the lumbar support unit and the chair back unit simpler.

[0008] Furthermore, the elastic support plate is perforated with several through holes extending vertically. These through holes not only reduce the strength of the elastic support plate, making it easier for it to undergo elastic deformation, but also, the multiple through holes on the elastic support plate are arranged horizontally according to a certain pattern and interval, giving the elastic support plate a perforated aesthetic appeal and further enhancing the aesthetics of the lumbar support unit.

[0009] Furthermore, the elastic support plate has an overall arc-shaped structure with the upper part protruding forward and the lower part bending backward. By setting the elastic support plate to an S-shaped arc structure, not only is the appearance more aesthetically pleasing and the aesthetics enhanced, but when the elastic support plate is compressed and undergoes elastic deformation, the stress is dispersed by the curved surface of the elastic support plate, thereby making the elastic support plate more resilient.

[0010] Furthermore, the lumbar support and elastic support plate are designed as separate units, allowing the lumbar support to move in multiple directions relative to the elastic support plate. This enables the lumbar support to move and conform to the lumbar curves of more different types of users, further enhancing the support experience.

[0011] Furthermore, the lumbar support is a split structure, including a central part and two symmetrical waist sections. The central part is slidably connected to the front end of the elastic support plate along the front-back direction, and the two waist sections are rotatably connected to the sides of the elastic support plate. Each waist section is equipped with a transmission part, which abuts against the rear end of the central part. In step S2, the central part slides backward under the support force, and the central part presses the transmission part backward, thereby driving the two waist sections to rotate inward synchronously. The lumbar support clamps the user's waist on both sides through the two rotatable waist sections, providing the user with a more comfortable waist-hugging feel. The central part drives the two waist sections to rotate by pressing the transmission part on the rear side, and the connection structure is relatively simple. Moreover, the waist sections can adapt to the width of the user's waist and rotate to fit the waist of different users, which not only makes the adjustment operation simple, but also provides a more stable and comfortable waist-hugging feel.

[0012] Furthermore, a guide mechanism is provided between the central part and the elastic support plate. The guide mechanism includes a connecting column and a connecting sleeve. The connecting column is located at one of the rear end of the central part and the front end of the elastic support plate, and the connecting sleeve is located at the other of the rear end of the central part and the front end of the elastic support plate. The connecting sleeve is fitted onto the connecting column, and when the central part slides back and forth relative to the elastic support plate, the connecting column slides back and forth relative to the connecting sleeve. This strengthens the connection between the central part and the elastic support plate, resulting in better stability of the lumbar support device's adjustment operation.

[0013] Furthermore, a connecting post is provided at the front end of the elastic support plate, and an undercut is provided on the side wall of the connecting post; a connecting sleeve is correspondingly provided at the rear end of the central part, and a corresponding slot extending in the front-back direction is formed on the side wall of the connecting sleeve. When the connecting sleeve is fitted onto the connecting post, the undercut engages with the slot. This not only facilitates installation, but also limits the sliding range of the connecting post and the connecting sleeve in the front-back direction when the central part slides back and forth, further improving the connection strength and stability between the two.

[0014] Furthermore, a first elastic element is provided between the central part and the elastic support plate. The first elastic element acts on the central part, causing the central part to always tend to move away from the elastic support plate. This not only allows the central part to provide elastic support to the user's waist, resulting in greater comfort, but also enables the central part to automatically return to its initial position with the help of the return elastic force of the first elastic element, making the reset operation very simple.

[0015] Furthermore, a hinge is provided at the rear end of the waist section, which is hinged to an elastic support plate. A second elastic member is provided between the hinge and the elastic support plate. The second elastic member acts on the hinge, so that the waist sections on both sides always have a tendency to rotate outward. This not only allows the central part to apply a more elastic support force to the user's waist, but also allows the waist section to automatically rotate outward to the initial position, and the transmission part to push the central part out to the initial position as well, further improving the convenience of the reset operation.

[0016] Furthermore, the lumbar support and the elastic support plate are integrated into a single structure, with the elastic support plate extending rearward relative to the lumbar support. This results in higher overall strength of the lumbar support unit, and when the lumbar support is subjected to a supporting force, the elastic support plate, under pressure from the lumbar support, can rotate more smoothly relative to the fixed frame while undergoing elastic deformation, thus improving stability.

[0017] Furthermore, both ends of the fixing frame are bent forward to form connecting parts, and support members are rotatably connected to the outer sides of the connecting parts on both sides. The lumbar support piece has rearward-extending support parts on both sides, with recessed grooves extending in the front-rear direction on the support parts. The support members are engaged with the support parts through the grooves. When the lumbar support piece moves, the support parts slide relative to the support members through the grooves. By setting up mutually engaging support members and support parts, the connection strength between the lumbar support piece and the fixing frame is increased, and the stability of the lumbar support piece's adjustment operation is improved.

[0018] Furthermore, the support member includes a front spherical protrusion that engages with the support portion via a groove, allowing the support portion to rotate around the protrusion in multiple directions. This enables the lumbar support portion to rotate slightly in multiple directions around the support member, thereby better conforming to the user's lumbar region and further enhancing the comfort of the seating.

[0019] Furthermore, a connecting member is hinged between the connecting parts on the left and right sides. The two support members on the left and right sides are respectively fixedly connected to the left and right sides of the connecting member, so that the support members on both sides are driven by the connecting member to rotate up and down relative to the fixed frame. This ensures that the support members on both sides always rotate at the same angle, which in turn drives the waist pieces on both sides to rotate at the same angle, thereby improving the stability of the rotation adjustment operation of the lumbar support unit.

[0020] Furthermore, a locking mechanism is provided between the lumbar support unit and the fixing frame. The locking mechanism includes a locking element and multiple limiting holes. The locking element is movably connected to one of the lumbar support unit and the fixing frame, and the multiple limiting holes are formed in the other of the lumbar support unit and the fixing frame. In step S, the locking element engages with the limiting holes, so that the lumbar support unit and the fixing frame are relatively fixed, and the seat can be maintained in a sitting or reclining position. Users can fix the seat in a certain position according to their needs, which improves its practicality.

[0021] Furthermore, the lumbar support unit includes a connecting member, with a positioning part protruding from the rear side of the connecting member, and an arc-shaped movable groove recessed at the front end of the fixing frame. When the connecting member rotates relative to the fixing frame, the positioning part slides along the movable groove. At least two limiting holes are formed by a horizontal cutout along the upper edge of the positioning part, and a locking member is horizontally inserted and slidably connected to the side wall of the movable groove. This improves the connection strength between the connecting member and the fixing frame, resulting in better stability of the rotation adjustment operation of the lumbar support unit. Moreover, by setting the locking member on the outer fixing frame, it is easier for the user to control the locking member to lock or unlock the connecting member, making the operation simpler.

[0022] Furthermore, the fixed frame is also equipped with an adjusting component and a movable component. The adjusting component is rotatably connected to the fixed frame, and one end of the movable component is connected to the adjusting component, while the other end is connected to the locking component. When the adjusting component rotates, it drives the movable component to move synchronously, thereby causing the locking component to slide left and right in the horizontal direction to engage or disengage from the limiting hole. The user can turn the outer adjusting component to engage or disengage the locking pin into the locking hole, thereby controlling the seat to lock or unlock in the current state, making the seat state adjustment operation simpler.

[0023] The method for improving the elasticity of lumbar support in seating provided in this application involves a lumbar support unit and a backrest unit that are independently rotatable relative to the seat unit. When switching from an upright sitting position to a reclining position, the rotation angle and position of the lumbar support unit and the backrest unit relative to the seat unit are different, with the lumbar support unit tending to push forward more than the backrest unit. That is, in the reclining position, the lumbar support unit is positioned further forward than the backrest unit, thereby compensating for the gap between the user's lower back and the support surface of the backrest unit when reclining, better conforming to the user's lower back, and preventing a feeling of emptiness in the lower back. Furthermore, the elastic support plate has elastic deformation capability. When the user sits down, the lumbar support component, under the force of support, compresses the elastic support plate, causing elastic deformation. This allows the lumbar support component to rotate further backward to conform to the curve of the user's waist, meaning it has the function of adapting to changes in the user's waist curve. In addition to the elasticity of the lumbar support component itself, the lumbar support component applies even more elastic support to the user's waist with the restoring elasticity of the elastic support plate. This not only makes the rotation and adjustment of the lumbar support unit simpler and smoother, but also allows the lumbar support unit to provide more comfortable elastic support. Moreover, the elastic support plate is located on the rear side of the lumbar support component, and the connection structure between the lumbar support component and the elastic support plate is hidden in the gap between the two, making the lumbar support unit structurally robust and with good overall integrity, clear contour lines, and a richer visual effect, thus enhancing the aesthetics of the seating. Attached Figure Description

[0024] Other features, objects, and advantages of this application will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings: Figure 1 A three-dimensional structural diagram of the seating provided in the embodiments of this application; Figure 2 A schematic diagram of the bottom structure of the seating provided in an embodiment of this application; Figure 3 A schematic diagram of the connection structure between the chair back unit, chair seat unit, and lumbar support unit provided in an embodiment of this application; Figure 4 A three-dimensional structural diagram of the lumbar support unit provided in the embodiments of this application; Figure 5 This is a cross-sectional structural diagram of the seat in an upright sitting state provided in an embodiment of this application; Figure 6 A cross-sectional structural diagram of the seat in a supine position provided in an embodiment of this application; Figure 7 This is a schematic diagram of the connection structure between the lumbar support unit and the fixing frame provided in an embodiment of this application; Figure 8 This is a schematic diagram of the connection structure between the elastic support plate and the fixing frame provided in the embodiments of this application; Figure 9 A three-dimensional structural diagram of the elastic support plate provided in the embodiments of this application; Figure 10 This is a schematic diagram of the connection structure between the connector and the fixing frame provided in the embodiments of this application; Figure 11 A cross-sectional structural diagram of the lumbar support unit when the center part is in the initial position, provided for an embodiment of this application; Figure 12A cross-sectional structural diagram of the lumbar support unit with central support force provided in an embodiment of this application.

[0025] The reference numerals in the attached figures are as follows: 1-Backrest unit, 2-Lumbar support, 2a-Center section, 2b-Lumbar section, 210-Transmission section, 220-Connecting sleeve, 221-Slot, 230-First elastic element, 240-Hinge section, 241-Second elastic element, 250-Support section, 251-Slide groove, 3-Elastic support plate, 301-Deformation hole, 310-Connecting column, 311-Inverted buckle, 4-Fixing frame, 410-Connecting section. 411-Connecting hole, 420-Modible groove, 430-Mounting groove, 431-Rotating groove, 440-Collar ring, 5-Linkage rod, 6-Supporting component, 610-Ball head protrusion, 620-Plug-in part, 7-Connecting component, 710-Positioning part, 711-Limiting hole, 720-Plug-in hole, 8-Locking component, 9-Adjusting component, 910-Adjusting part, 10-Modible component, 11-Seat cushion, 12-Guide part, 13-Rocker. Detailed Implementation

[0026] The present application will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, only the parts relevant to the invention are shown in the accompanying drawings.

[0027] Please refer to the attached document. Figure 1-12 This application provides a method for improving the elasticity of lumbar support in seating, comprising the following steps: I. Seating configuration: The seating includes a seat unit, a lumbar support unit, a backrest unit 1, and a fixing frame 4. The lumbar support unit includes a lumbar support member 2 located on the front side and an elastic support plate 3 on the rear side. The elastic support plate 3 has elastic deformation capability. The bottom end of the fixing frame 4 is connected to the seat unit, and the elastic support plate 3 is hinged to the fixing frame 4, so that the lumbar support unit can rotate relative to the seat unit. The backrest unit 1 and the seat unit are rotatably arranged relative to each other, and a linkage mechanism is provided between the backrest unit 1 and the elastic support plate 3. II. Instructions for use: S1. Adjust the posture of the seat. The seat includes a sitting position and a reclining position. When switching from the sitting position to the reclining position, the backrest unit 1 tilts back and drives the elastic support plate 3 to rotate backward and generate elastic deformation through the linkage mechanism. This causes relative rotation and relative movement between the lumbar support unit and the backrest unit 1, making the lumbar support unit push forward more relative to the backrest unit 1. S2. When using a seat, the seat unit supports the user's buttocks, and the lumbar support unit supports the user's waist. After being supported, the elastic support plate 3 rotates further backward and produces elastic deformation. Under the restoring elastic force of the elastic support plate 3, the lumbar support piece 2 pushes forward to conform to the curve of the user's waist.

[0028] In this embodiment, the lumbar support unit and the backrest unit 1 are independently rotatable relative to the seat unit. When switching from a sitting position to a reclining position, the rotation angle and position of the lumbar support unit and the backrest unit 1 relative to the seat unit are different, with the lumbar support unit tending to lean forward more than the backrest unit 1. That is, in the reclining position, the lumbar support unit is positioned further forward than the backrest unit 1, thereby bridging the gap between the user's waist and the support surface of the backrest unit 1 when reclining, better conforming to the user's waist, and preventing a feeling of emptiness in the waist.

[0029] The elastic support plate 3 has elastic deformation capability. When the user sits down, the lumbar support piece 2, under the force of support, compresses the elastic support plate 3, causing elastic deformation. This allows the lumbar support piece 2 to rotate further backward to conform to the curve of the user's waist, meaning the lumbar support piece 2 has the function of adapting to changes in the user's waist curve. In addition to the elasticity of the lumbar support piece 2 itself, the lumbar support piece 2, with the help of the restoring elasticity of the elastic support plate 3, applies a more elastic support force to the user's waist. This not only makes the rotation and adjustment operation of the lumbar support unit simpler and smoother, but also allows the lumbar support unit to provide more comfortable elastic support. Furthermore, the elastic support plate 3 covers the rear side of the lumbar support piece 2, and the connection structure between the lumbar support piece 2 and the elastic support plate 3 is hidden in the gap between the two, making the lumbar support unit structurally robust and with good overall integrity, clear contour lines, and a richer visual effect, thereby enhancing the aesthetics of the seating.

[0030] The chair seat unit includes a seat cushion 11 and a chassis. The chassis includes a guide portion 12 and a rocker arm 13 that rotate and cooperate with each other. The guide portion 12 is connected to the bottom of the seat cushion 11, and the bottom end of the fixing frame 4 is fixedly connected to the guide portion 12. The backrest unit 1 is connected to the rear end of the rocker arm 13. When switching from a sitting position to a reclining position, the rocker arm 13 rotates downward as the backrest unit 1 reclines, and the guide portion 12 is driven upward by the rocker arm 13, which in turn drives the seat cushion 11 and the fixing frame 4 to move upward, resulting in a larger rotation angle for the lumbar support unit. That is, the chair seat unit also changes with the movement of the backrest unit 1 and the lumbar support unit, making the support surface of the seat in the reclining position more conform to the curve changes of the user's back, waist, and hips when reclining, which is more ergonomic. The chassis, rocker arm 13, and guide part 12 used in this embodiment are structurally and functionally identical to the chassis provided in the lumbar support linkage mechanism and seat provided in the inventor's previous patent application (application number: CN202420585729.9), and will not be described in detail in this embodiment.

[0031] Please refer to the attached document. Figure 4-6In some embodiments of this application, the linkage mechanism includes a linkage rod 5, the front end of which is hinged to the elastic support plate 3, and the rear end of which is hinged to the chair back unit 1. In step S1, when the chair back unit 1 is tilted back, the linkage rod 5 is driven to move backward by the chair back unit 1, and the linkage rod 5 pulls the elastic support plate 3 backward, thereby causing the elastic support plate 3 to rotate backward and generate elastic deformation.

[0032] In this embodiment, a linkage rod 5 is provided between the backrest unit 1 and the elastic support plate 3. When the backrest unit 1 reclines, the linkage rod 5 moves backward, thereby causing the elastic support plate 3 to rotate backward and generate elastic deformation. Conversely, when the backrest unit 1 rotates forward to return to the seated position, the linkage rod 5 moves forward, thereby pushing the elastic support plate 3 forward, causing the elastic support plate 3 to rotate forward and return to its original position. Thus, by providing the linkage rod 5, the elastic support plate 3 can move synchronously with the backrest unit 1, making the rotation adjustment operation of the lumbar support unit and the backrest unit simpler.

[0033] Please refer to the attached document. Figure 4 and attached Figure 9 In some embodiments of this application, the elastic support plate 3 is provided with a plurality of through holes 301 extending in the vertical direction. The through holes 301 not only reduce the strength of the elastic support plate 3, making it easier for the elastic support plate 3 to undergo elastic deformation, but also, the multiple through holes 301 on the elastic support plate 3 are arranged laterally in a certain pattern and at certain intervals, making the elastic support plate 3 aesthetically pleasing with its openwork design, providing a richer visual effect, and further enhancing the aesthetics of the lumbar support unit.

[0034] Please refer to the attached document. Figure 4 and attached Figure 9 In some embodiments of this application, the elastic support plate 3 has an overall arc-shaped structure with the upper part protruding forward and the lower part bending backward. By setting the elastic support plate 3 as an S-shaped arc structure, it not only has a more aesthetically pleasing arc shape and provides a richer visual effect, further enhancing its aesthetics, but also, when the elastic support plate 3 is compressed and undergoes elastic deformation, the stress is dispersed by the curved surface of the elastic support plate 3, thereby making the elastic support plate 3 more resilient and less prone to breakage.

[0035] Please refer to the attached document. Figure 7 In some embodiments of this application, the lumbar support 2 and the elastic support plate 3 are separately arranged, so that the lumbar support 2 can move in multiple directions relative to the elastic support plate 3.

[0036] In this embodiment, the lumbar support 2 is movably connected to the elastic support plate 3. That is, when the lumbar support 2 is supported, it can move and adjust in a small range in terms of tilt angle and spacing relative to the elastic support plate 3 until the lumbar support 2 perfectly fits the user's waist, thereby better adapting to users of different body types and improving the support for the waist.

[0037] Please refer to the attached document. Figure 7 Appendix Figure 11 and attached Figure 12 In some embodiments of this application, the lumbar support 2 is a split structure, including a central part 2a in the middle and two symmetrical waist parts 2b on the left and right. The central part 2a is slidably connected to the front end of the elastic support plate 3 in the front-back direction. The two waist parts 2b are rotatably connected to the two sides of the elastic support plate 3. The two waist parts 2b are provided with a transmission part 210. The transmission parts 210 on both sides abut against the rear end of the central part 2a. In step S2, the central part 2a slides backward under the force of support, and the central part 2a presses the transmission part 210 backward, thereby driving the two waist parts 2b on both sides to rotate inward synchronously.

[0038] In this embodiment, the lumbar support 2 clamps the user's waist on both sides through two rotatable waist pieces 2b, providing a more comfortable lumbar support. The central part 2a drives the two waist pieces 2b to rotate by pressing the rear transmission part 210, resulting in a relatively simple connection structure. Moreover, when the central part 2a is pressed by the user's waist, it moves backward and presses the transmission part 210, thereby causing the two waist pieces 2b to automatically rotate inward to clamp the user's waist. That is, the waist pieces 2b can adapt to the width of the user's waist and rotate accordingly, thus fitting the waist of different users. This not only makes adjustment easy but also provides a more stable and comfortable lumbar support.

[0039] Please refer to the attached document. Figure 7 and attached Figure 9 In some embodiments of this application, a guide mechanism is provided between the central part 2a and the elastic support plate 3. The guide mechanism includes a connecting post 310 and a connecting sleeve 220. The connecting post 310 is disposed at one of the rear end of the central part 2a and the front end of the elastic support plate 3, and the connecting sleeve 220 is disposed at the other of the rear end of the central part 2a and the front end of the elastic support plate 3. The connecting sleeve 220 is sleeved on the connecting post 310, and when the central part 2a slides back and forth relative to the elastic support plate 3, the connecting post 310 slides back and forth relative to the connecting sleeve 220.

[0040] In this embodiment, by setting a connecting sleeve 220 and a connecting post 310 that fit together, when the central part 2a is squeezed by the user's waist, it can only slide along the length direction of the connecting post 310, that is, slide back and forth relative to the elastic support plate 3, which strengthens the connection strength between the central part 2a and the elastic support plate 3, and makes the adjustment operation of the waist support device more stable.

[0041] Preferably, two sets of guide mechanisms are provided between the central part 2a and the elastic support plate 3, thereby further strengthening the connection between the two and further improving the stability of the adjustment operation.

[0042] Please refer to the attached document. Figure 7 and attached Figure 9In some embodiments of this application, the front end of the elastic support plate 3 is provided with a connecting post 310, and the side wall of the connecting post 310 is provided with a buckle 311; the connecting sleeve 220 is correspondingly provided at the rear end of the central part 2a, and the side wall of the connecting sleeve 220 is correspondingly hollowed out to form a slot 221 extending in the front-back direction. When the connecting sleeve 220 is sleeved on the connecting post 310, the buckle 311 is engaged with the slot 221.

[0043] In this embodiment, the connecting post 310 and the connecting sleeve 220 are engaged by the buckle 311 and the slot 221, which not only makes installation convenient, but also allows the buckle 311 to slide within the slot 221 when the central part 2a slides back and forth, limiting the sliding range of the connecting post 310 and the connecting sleeve 220 in the front and back directions, preventing the central part 2a from detaching from the elastic support plate 3 when sliding forward, further improving the connection strength between the two and making the stability better.

[0044] Please refer to the attached document. Figure 7 In some embodiments of this application, a first elastic member 230 is provided between the central portion 2a and the elastic support plate 3. The first elastic member 230 acts on the central portion 2a, so that the central portion 2a always has a tendency to move away from the elastic support plate 3.

[0045] In this embodiment, when the central part 2a slides backward under pressure, the first elastic element 230 is squeezed by the central part 2a and undergoes elastic deformation. With the help of the restoring elastic force of the first elastic element 230, the central part 2a can not only provide elastic support to the user's waist, making it more comfortable, but also automatically return to the initial position when the user does not need to use the seat, thanks to the restoring elastic force of the first elastic element 230. The reset operation is very simple.

[0046] Preferably, the first elastic element 230 is a spring, which not only has good elasticity, but also can be directly sleeved onto the connecting post 310 and the connecting sleeve 220, making installation relatively convenient.

[0047] Please refer to the attached document. Figure 7 In some embodiments of this application, a hinge portion 240 is provided at the rear end of the waist portion 2b. The hinge portion 240 is hinged to the elastic support plate 3, and a second elastic member 241 is provided between the hinge portion 240 and the elastic support plate 3. The second elastic member 241 acts on the hinge portion 240, so that the waist portions 2b on both sides always have a tendency to rotate outward.

[0048] In this embodiment, when the waist support portion 2b rotates, the second elastic member 241 undergoes elastic deformation and applies a restoring elastic force to the waist support portion 2b. The waist support portion 2b always tends to rotate outward, and pushes the center portion 2a forward through the transmission portion 210, causing the center portion 2a to tend to push forward. This not only allows the center portion 2a to apply a more elastic support force to the user's waist when the user leans against the lumbar support 2, but also allows the waist support portion 2b to automatically rotate outward to its initial position when the user does not need to use the seat, and pushes the center portion 2a out to its initial position through the transmission portion 210, further improving the convenience of the reset operation.

[0049] Preferably, the hinge portion 240 and the elastic support plate 3 are hinged together by a vertical pivot. The second elastic element 241 is a movable element sleeved on the pivot. One side of the movable element acts on the hinge portion 240, and the other side acts on the elastic support plate 3. This not only provides good elasticity but also makes installation more convenient.

[0050] In this application, the lumbar support 2 and the elastic support plate 3 can be designed as a separate structure or as an integral structure: In some embodiments of this application, the lumbar support 2 and the elastic support plate 3 are an integral structure, with the elastic support plate 3 extending rearward relative to the lumbar support 2. By directly setting the lumbar support 2 and the elastic support plate 3 as an integral structure, the overall strength of the lumbar support unit is higher, and when the lumbar support 2 is subjected to a support force, the elastic support plate 3, after being subjected to pressure from the lumbar support 2, can rotate more smoothly relative to the fixed frame 4 while generating elastic deformation, resulting in better stability.

[0051] Please refer to the attached document. Figure 7 In some embodiments of this application, both ends of the fixing frame 4 are bent forward to form connecting portions 410. Support members 6 are rotatably connected to the outer sides of the connecting portions 410 on both sides. Support portions 250 extending backward are provided on both sides of the lumbar support member 2. A groove 251 extending in the front-back direction is recessed in the support portion 250. The support member 6 is engaged with the support portion 250 through the groove 251. When the lumbar support member 2 moves, the support portion 250 slides relative to the support member 6 through the groove 251. By providing mutually engaging support members 6 and support portions 250, the connection strength between the lumbar support member 2 and the fixing frame 4 is higher, and the stability of the lumbar support member 2's adjustment operation is better.

[0052] Please refer to the attached document. Figure 7 In some embodiments of this application, the support member 6 includes a front spherical protrusion 610, which is engaged with the support portion 250 via a groove 251. The support portion 250 can rotate around the protrusion 610 in multiple directions.

[0053] The support part 250 is located on the rear side of the lumbar part 2b, allowing the lumbar part 2b to rotate slightly in multiple directions around the support member 6, thereby better conforming to the user's waist and further improving the comfort of the seat.

[0054] Please refer to the attached document. Figure 8 and attached Figure 10 In some embodiments of this application, a connecting member 7 is also hinged between the connecting portions 410 on the left and right sides, and the two support members 6 on the left and right sides are respectively fixedly connected to the connecting member 7, so that the support members 6 on both sides are driven by the connecting member 7 to rotate up and down relative to the fixed frame 4.

[0055] In this embodiment, when the lumbar support unit rotates up and down relative to the fixed frame 4 to adjust its tilt, the support member 6 is driven to rotate along with the lumbar piece 2b. By connecting the support members 6 on both sides through the connecting member 7, the support members 6 on both sides always rotate at the same angle, thereby driving the lumbar pieces 2b on both sides to rotate at the same angle, thus making the rotation adjustment operation of the lumbar support unit more stable.

[0056] Preferably, the support member 6 has a protruding insertion portion 620, and the left and right sides of the connecting member 7 have corresponding recessed insertion holes 720. The insertion portion 620 has an irregular shape, and the insertion holes 720 are also corresponding irregular holes. The connecting portion 410 has a hollowed-out connecting hole 411. The insertion portion 620 passes through the connecting hole 411 and engages with the fixing hole 510, so that the support member 4 cannot rotate relative to the connecting member 7. The connecting member 7 has an arc-shaped structure that bends backward in the middle. The left and right ends of the elastic support plate 3 abut against the left and right sides of the connecting member 7. Screws are screwed into the left and right sides of the elastic support plate 3 to screw and fix the connecting member 7 and the support member 6. The connection strength is high and the assembly is relatively convenient.

[0057] Please refer to the attached document. Figure 8 and attached Figure 10 In some embodiments of this application, a locking mechanism is also provided between the lumbar support unit and the fixing frame 4. The locking mechanism includes a locking member 8 and multiple limiting holes 711. The locking member 8 is movably connected to one of the lumbar support unit and the fixing frame 4, and the multiple limiting holes 711 are opened in the other of the lumbar support unit and the fixing frame 4. In step S1, the locking member 8 is engaged with the limiting hole 711, so that the lumbar support unit and the fixing frame 4 are relatively fixed, and the seat can be maintained in a sitting or reclining state. This prevents the lumbar support member 2 connected to the support member 6 from rotating and adjusting a large range relative to the fixing frame 4 in either the sitting or reclining state, thereby allowing the lumbar support unit to be positioned in the current state, i.e., the seat cannot switch between the sitting and reclining states. Users can fix the seat in a certain state according to their needs, which improves its practicality.

[0058] Please refer to the attached document. Figure 10In some embodiments of this application, the lumbar support unit includes a connecting member 7, a positioning part 710 protruding from the rear side of the connecting member 7, and an arc-shaped movable groove 420 recessed at the front end of the fixing frame 4. When the connecting member 7 rotates relative to the fixing frame 4, the positioning part 710 slides along the movable groove 420. At least two limiting holes 711 are formed on the positioning part 710 with a transverse cutout. The locking member 8 is transversely inserted and slidably connected to the side wall of the movable groove 420.

[0059] In this embodiment, the connecting member 7 slides between the rear movable part 710 and the connecting groove 420 on the fixing frame 4, which improves the connection strength between the connecting member 7 and the fixing frame 4, resulting in better stability of the rotation adjustment operation of the lumbar support unit. Furthermore, by setting the locking member 8 on the outer fixing frame 4, it is convenient for the user to control the locking member 8 to lock or unlock the connecting member 7, making the operation simpler.

[0060] Of course, in other embodiments of this application, the locking pin 8 can also be movably connected to the connecting member 7, and multiple locking holes 711 can be opened on the fixing frame 4.

[0061] Please refer to the attached document. Figure 10 In some embodiments of this application, the fixed frame 4 is further provided with an adjusting member 9 and a movable member 10. The adjusting member 9 is rotatably connected to the fixed frame 4, and one end of the movable member 10 is connected to the adjusting member 9, while the other end is connected to the locking member 8. When the adjusting member 9 rotates, it drives the movable member 10 to move synchronously, thereby causing the locking member 8 to slide left and right in the horizontal direction to engage or disengage from the limiting hole 711. The user can turn the outer adjusting member 9 to drive the locking pin 8 to engage or disengage from the locking hole 711, thereby controlling the seat to lock or unlock in the current state, making the seat state adjustment operation simpler.

[0062] Preferably, one side of the left and right sides of the fixing frame 4 has a recessed mounting groove 430. The movable member 10 is a torsion spring, which is sleeved on a screw and connected to the bottom of the mounting groove 430, allowing it to rotate relative to the fixing member 4. The locking member 8 passes through the mounting groove 430 and is connected to one side of the lever arm of the movable member 10. The bottom of the mounting groove 430 is hollowed out to form an arc-shaped rotating groove 431. The adjusting member 9 is rotatably connected to the bottom of the fixing frame 4, and the adjusting member 9 includes an adjusting part 910, which passes through the rotating groove 431 and is connected to the other side of the lever arm of the movable member 10. By placing the movable member 10 and the locking member 8 within the mounting groove 430, the fixing frame 4 becomes more compact in structure. A wave-shaped collar 440 is also engaged on the rotating groove 431. When the adjusting member 9 rotates, the adjusting part 910 slides in the collar 440 and can stop at the current sliding position. Therefore, whether using the seat or adjusting the backrest, the adjusting member 9 is not easy to rotate under the action of external force, avoiding the movement of the locking member 8 and affecting the use and adjustment operation of the seat, thus improving stability.

[0063] It should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., used above to indicate orientation or positional relationships are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, unless otherwise stated, "a plurality of" means three or more.

[0064] The above description is merely a preferred embodiment of this application and an explanation of the technical principles employed. Those skilled in the art should understand that the scope of the invention involved in this application is not limited to technical solutions formed by specific combinations of the above-described technical features, but should also cover other technical solutions formed by arbitrary combinations of the above-described technical features or their equivalents without departing from the inventive concept. For example, technical solutions formed by substituting the above features with (but not limited to) technical features with similar functions disclosed in this application.

Claims

1. A method for improving the elasticity of lumbar support in seating, characterized in that, Includes the following steps:

1. Seating configuration: The seating includes a seat unit, a lumbar support unit, a backrest unit (1) and a fixing frame (4). The lumbar support unit includes a lumbar support member (2) located on the front side and an elastic support plate (3) on the rear side. The elastic support plate (3) has elastic deformation capability. The bottom end of the fixing frame (4) is connected to the seat unit, and the elastic support plate (3) is hinged to the fixing frame (4), so that the lumbar support unit can rotate relative to the seat unit. The backrest unit (1) and the seat unit are rotatably arranged relative to each other, and a linkage mechanism is provided between the backrest unit (1) and the elastic support plate (3). II. Instructions for use: S1. Adjust the posture of the seat. The seat includes a sitting position and a reclining position. When switching from the sitting position to the reclining position, the backrest unit (1) tilts back and drives the elastic support plate (3) to rotate backward and generate elastic deformation through the linkage mechanism, so that the lumbar support unit and the backrest unit (1) generate relative rotation and relative movement, and the lumbar support unit pushes forward more relative to the backrest unit (1). S2. When using a seat, the seat unit supports the user's buttocks and the lumbar support unit supports the user's waist. The elastic support plate (3) rotates backward and undergoes elastic deformation after being supported. The lumbar support piece (2) is pushed forward to fit the curve of the user's waist under the restoring elastic force of the elastic support plate (3).

2. The method for improving the elasticity of lumbar support in a seating fixture according to claim 1, characterized in that, The linkage mechanism includes a linkage rod (5), the front end of which is hinged to the elastic support plate (3), and the rear end of which is hinged to the chair back unit (1). In step S1, when the chair back unit (1) is tilted back, the linkage rod (5) is driven to move backward by the chair back unit (1), and the linkage rod (5) pulls the elastic support plate (3) backward, thereby causing the elastic support plate (3) to rotate backward and generate elastic deformation.

3. The method for improving the elasticity of lumbar support in a seating fixture according to claim 1, characterized in that, The elastic support plate (3) has several through holes (301) extending in the vertical direction.

4. The method for improving the elasticity of lumbar support in a seating fixture according to claim 1, characterized in that, The elastic support plate (3) has an arc-shaped structure with the upper part protruding forward and the lower part bending backward.

5. The method for improving the elasticity of lumbar support in a seating fixture according to claim 1, characterized in that, The lumbar support (2) and the elastic support plate (3) are separately arranged, so that the lumbar support (2) can move in multiple directions relative to the elastic support plate (3).

6. The method for improving the elasticity of lumbar support in a seating fixture according to claim 5, characterized in that, The lumbar support (2) is a split structure, including a central part (2a) and two symmetrical waist parts (2b). The central part (2a) is slidably connected to the front end of the elastic support plate (3) along the front-back direction. The two waist parts (2b) are rotatably connected to the two sides of the elastic support plate (3). The two waist parts (2b) are provided with a transmission part (210). The transmission parts (210) on both sides abut against the rear end of the central part (2a). In step S2, the central part (2a) slides backward under the force of the support, and the central part (2a) squeezes the transmission part (210) backward, thereby driving the waist parts (2b) on both sides to rotate inward synchronously.

7. The method for improving the elasticity of lumbar support in a seating fixture according to claim 6, characterized in that, A guide mechanism is provided between the central part (2a) and the elastic support plate (3). The guide mechanism includes a connecting post (310) and a connecting sleeve (220). The connecting post (310) is located at one of the rear end of the central part (2a) and the front end of the elastic support plate (3), and the connecting sleeve (220) is located at the other of the rear end of the central part (2a) and the front end of the elastic support plate (3). The connecting sleeve (220) is sleeved on the connecting post (310), and when the central part (2a) slides back and forth relative to the elastic support plate (3), the connecting post (310) slides back and forth relative to the connecting sleeve (220).

8. The method for improving the elasticity of lumbar support in a seating fixture according to claim 7, characterized in that, The front end of the elastic support plate (3) is provided with the connecting post (310), and the side wall of the connecting post (310) is provided with a buckle (311); the connecting sleeve (220) is correspondingly provided at the rear end of the central part (2a), and the side wall of the connecting sleeve (220) is correspondingly hollowed out to form a slot (221) extending in the front-back direction. When the connecting sleeve (220) is sleeved on the connecting post (310), the buckle (311) is engaged with the slot (221).

9. The method for improving the elasticity of lumbar support in a seating fixture according to claim 6, characterized in that, A first elastic element (230) is provided between the central part (2a) and the elastic support plate (3). The first elastic element (230) acts on the central part (2a) so that the central part (2a) always has a tendency to move away from the elastic support plate (3).

10. The method for improving the elasticity of lumbar support in a seating fixture according to claim 6, characterized in that, The rear end of the waist section (2b) is provided with a hinge section (240), which is hinged to the elastic support plate (3). A second elastic member (241) is provided between the hinge section (240) and the elastic support plate (3). The second elastic member (241) acts on the hinge section (240), so that the waist sections (2b) on both sides always have a tendency to rotate outward.

11. The method for improving the elasticity of lumbar support in a seating fixture according to claim 1, characterized in that, The lumbar support (2) and the elastic support plate (3) are an integral structure, and the elastic support plate (3) extends backward relative to the lumbar support (2).

12. The method for improving the elasticity of lumbar support in a seating fixture according to claim 1, characterized in that, The left and right ends of the fixed frame (4) are bent forward to form connecting parts (410). Support members (6) are rotatably connected to the outer sides of the connecting parts (410) on both sides. Support parts (250) extending backward are provided on both sides of the waist support (2). A groove (251) extending in the front-back direction is recessed on the support part (250). The support member (6) is engaged with the support part (250) through the groove (251). When the waist support (2) moves, the support part (250) slides relative to the support member (6) through the groove (251).

13. The method for improving the elasticity of lumbar support in a seating fixture according to claim 12, characterized in that, The support member (6) includes a front spherical protrusion (610), which is engaged with the support part (250) through the slide groove (251). The support part (250) can rotate around the protrusion (610) in multiple directions.

14. The method for improving the elasticity of lumbar support in a seating fixture according to claim 12, characterized in that, A connecting member (7) is also hinged between the connecting parts (410) on the left and right sides. The two supporting members (6) on the left and right sides are respectively fixedly connected to the left and right sides of the connecting member (7), so that the supporting members (6) on both sides are driven by the connecting member (7) to rotate up and down relative to the fixed frame (4).

15. The method for improving the elasticity of lumbar support in a seating fixture according to claim 1, characterized in that, A locking mechanism is also provided between the lumbar support unit and the fixing frame (4). The locking mechanism includes a locking member (8) and multiple limiting holes (711). The locking member (8) is movably connected to one of the lumbar support unit and the fixing frame (4), and the multiple limiting holes (711) are opened in the other of the lumbar support unit and the fixing frame (4). In step S1, the locking member (8) is engaged with the limiting hole (711), so that the lumbar support unit and the fixing frame (4) are relatively fixed, and the seat can be maintained in a sitting or reclining state.

16. The method for improving the elasticity of lumbar support in a seating fixture according to claim 15, characterized in that, The lumbar support unit includes a connecting member (7), a positioning part (710) is formed by the rear protrusion of the connecting member (7), and an arc-shaped movable groove (420) is formed by the front end of the fixing frame (4). When the connecting member (7) rotates relative to the fixing frame (4), the positioning part (710) slides along the movable groove (420). At least two limiting holes (711) are formed on the positioning part (710) by horizontal hollowing. The locking member (8) is horizontally inserted and slidably connected to the side wall of the movable groove (420).

17. The method for improving the elasticity of lumbar support in a seating fixture according to claim 16, characterized in that, The fixed frame (4) is also provided with an adjusting member (9) and a movable member (10). The adjusting member (9) is rotatably connected to the fixed frame (4). One end of the movable member (10) is connected to the adjusting member (9), and the other end is connected to the locking member (8). When the adjusting member (9) rotates, it drives the movable member (10) to move synchronously, thereby driving the locking member (8) to slide left and right in the horizontal direction to engage or disengage from the limiting hole (711).

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