Adaptive human back support for office chair

Abstract

The application discloses an adaptive human back support of an office chair, which comprises a bottom disc, a support assembly is installed on the back side of the bottom disc, the support assembly is sequentially installed with a first human body fitting rotary part, a second human body fitting rotary part, a third human body fitting rotary part, a fourth human body fitting rotary part and a fifth human body fitting rotary part from top to bottom, a sixth human body fitting part is installed on the top of the bottom disc, and the support assembly comprises a back corner code and a back connecting part which are connected with the back side of the bottom disc. The application utilizes kinetic energy generated when the human body leans, generates force and distance change on the waist position, six fitting points are arranged on the support, correspond to each area of the human body from the neck to the hips, and a continuous supporting curved surface is formed. When the user leans back, the human body gravity and the natural force of leaning back are combined, are converted into dynamic adjustment of the waist support through a torsion transmission system, the support always keeps close fitting with the human back, and the riding comfort and stability are improved.

Description

Technical Field

[0001] This invention relates to the field of office chair technology, and more specifically to an adaptive human back support for an office chair. Background Technology

[0002] Office chairs are frequently used seating in daily work, and their quality directly impacts user comfort. However, most office chair backrests on the market currently use manual lumbar support adjustments, requiring users to manually adjust according to their needs – a cumbersome process that struggles to achieve a precise fit. Furthermore, traditional structures often experience physical displacement when the user leans back, causing the support position to shift and affecting comfort. Existing technology lacks a structure that automatically adapts to changes in lumbar position when the body leans back, making it difficult to achieve continuous and stable support and meet user comfort needs in different postures. Therefore, to overcome the shortcomings of existing technology, improvements are necessary. Summary of the Invention

[0003] The purpose of this invention is to overcome the shortcomings and deficiencies of the prior art and provide an adaptive human back support for an office chair that is comfortable and stable to use.

[0004] This invention is achieved through the following technical solution: An adaptive human body back support for an office chair includes a chassis, a support assembly mounted on the rear side of the chassis, and a first human body conforming rotating component, a second human body conforming rotating component, a third human body conforming rotating component, a fourth human body conforming rotating component and a fifth human body conforming rotating component mounted sequentially from top to bottom on the support assembly, and a sixth human body conforming component mounted on the top of the chassis.

[0005] Furthermore, the support assembly includes a back corner bracket and a back connector connected to the rear side of the chassis. A back support main support is hinged to the top of the back corner bracket. A back support slider is slidably connected to the front side of the back support main support. A headrest adjustment support assembly is mounted on the top of the back support slider. A first body-fitting rotating component is mounted on the front side of the headrest adjustment support assembly. An upper conversion bracket is hinged to the front side of the back support slider. The second and third body-fitting rotating components are mounted on the upper... A lower conversion bracket is connected to the rear side of the fourth body-fitting rotating component and the rear side of the fifth body-fitting rotating component on the front side of the conversion bracket. An upper shaft is hinged to the bottom of the back bracket sliding component. The top of the upper shaft is hinged to the middle of the lower conversion bracket. The bottom of the upper shaft is hinged to the lower part of the back bracket main support component. A lower shaft is slidably connected to the rear side of the back connector. The top of the lower shaft is hinged to the lower part of the lower conversion bracket. The lower part of the lower shaft is hinged to the bottom of the back bracket main support component.

[0006] Furthermore, the headrest adjustment bracket assembly includes a support rod inserted into the top of the back support sliding member, and a mounting seat is hinged to the top of the support rod. The first human-fitting rotating member is mounted on the front side of the mounting seat.

[0007] Furthermore, the back support assembly is mounted on the top of the back corner bracket via a first positive pressure rotating shaft clamp.

[0008] Furthermore, the back support sliding member is installed on the front side of the back support main support member via a second positive pressure rotating shaft member.

[0009] Furthermore, the upper conversion bracket is mounted on the back bracket sliding member via a third positive pressure rotating shaft pressure member.

[0010] Furthermore, the bottom of the upper shaft is mounted to the lower part of the back support main support via a fourth positive pressure rotating shaft clamp.

[0011] Furthermore, the front side of the headrest adjustment bracket assembly is hinged to the rear side of the first body-fitting rotating component.

[0012] Furthermore, the front side of the upper conversion bracket is hinged to the rear side of the second human body-fitting rotating component, and the front side of the upper conversion bracket is hinged to the rear side of the third human body-fitting rotating component.

[0013] Furthermore, the front side of the lower conversion bracket is hinged to the rear side of the fourth human body-fitting rotating component, and the front side of the lower conversion bracket is hinged to the rear side of the fifth human body-fitting rotating component.

[0014] Compared to existing technologies, this invention features a support assembly with a first, second, third, fourth, and fifth body-fitting rotating component installed sequentially from top to bottom. A sixth body-fitting component is mounted on the top of the chassis. Utilizing the kinetic energy generated when the body leans back, it creates changes in force and distance on the waist. The support has six contact points, corresponding to various areas of the body from the neck to the hips, forming a continuous support surface. When the user leans back, the combined effect of the body's weight and the natural force of leaning back is converted into dynamic adjustment of lumbar support through a torque transmission system. This ensures that the support always maintains a close fit with the back of the user, achieving an adaptive support effect and improving riding comfort and stability. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the adaptive human back support for the office chair of the present invention; Figure 2 This is an exploded view of the adaptive human back support structure of the office chair of the present invention. Figure 3 This is an exploded view of the support assembly of the present invention; Figure 4 This is a diagram showing the trajectory of the natural force generated backward by the adaptive human back support of the office chair of the present invention when the chair is in a sitting position. Figure 5 This is a diagram showing the trajectory of the natural force generated backward by the bracket assembly of the present invention when the user is seated. Figure 6 This is a schematic diagram of the adaptive human back support of the office chair of the present invention in a static state. Figure 7 This is a schematic diagram of the adaptive human back support of the office chair of the present invention after reclining while seated.

[0017] In the diagram: 1-Chassis; 2-Bracket assembly; 3-First human body-fitting rotating component; 4-Second human body-fitting rotating component; 5-Third human body-fitting rotating component; 6-Fourth human body-fitting rotating component; 7-Fifth human body-fitting rotating component; 8-Sixth human body-fitting component; 9-Back corner bracket; 10-Back connector; 11-Back bracket main support component; 12-Back bracket sliding component; 13-Upper conversion bracket; 14-Lower conversion bracket; 15-Upper shaft component; 16-Lower shaft component; 17-Support rod; 18-Mounting base; 19-First positive pressure rotating shaft component; 20-Second positive pressure rotating shaft component; 21-Third positive pressure rotating shaft component; 22-Fourth positive pressure rotating shaft component. Detailed Implementation

[0018] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0019] like Figures 1 to 7The present invention discloses an adaptive human back support for an office chair, comprising a chassis 1, a support assembly 2 mounted on the rear side of the chassis 1, and, from top to bottom, a first human-fitting rotating component 3, a second human-fitting rotating component 4, a third human-fitting rotating component 5, a fourth human-fitting rotating component 6, and a fifth human-fitting rotating component 7 mounted on the support assembly 2. A sixth human-fitting component 8 is mounted on the top of the chassis 1. This invention utilizes the kinetic energy generated when the human body leans back to create changes in force and distance to the lumbar region. The support has six contact points, corresponding to various areas of the human body from the neck to the buttocks, forming a continuous support surface. When the user leans back, the combined effect of the user's weight and the natural force of leaning back is converted into dynamic adjustment of lumbar support through a torque transmission system, ensuring that the support always maintains a close fit with the user's back, achieving an adaptive support effect and improving seating comfort and stability.

[0020] The support assembly 2 includes a back corner bracket 9 and a back connector 10 connected to the rear side of the chassis 1. A back support main support 11 is hinged to the top of the back corner bracket 9. A back support slider 12 is slidably connected to the front side of the back support main support 11. A headrest adjustment support assembly is mounted on the top of the back support slider 12. A first body-fitting rotating member 3 is mounted on the front side of the headrest adjustment support assembly. An upper conversion bracket 13 is hinged to the front side of the back support slider 12. A second body-fitting rotating member 4 and a third body-fitting rotating member 5 are mounted on the upper conversion bracket 1. On the front side of component 3, the rear side of the fourth body-fitting rotating component 6 and the rear side of the fifth body-fitting rotating component 7 are connected to a lower conversion bracket 14. An upper shaft 15 is hinged to the bottom of the back support sliding component 12. The top of the upper shaft 15 is hinged to the middle of the lower conversion bracket 14, and the bottom of the upper shaft 15 is hinged to the lower part of the back support main support component 11. A lower shaft 16 is slidably connected to the rear side of the back connector 10. The top of the lower shaft 16 is hinged to the lower part of the lower conversion bracket 14, and the lower part of the lower shaft 16 is hinged to the bottom of the back support main support component 11. This invention achieves multi-axis fit from the neck to the hips by setting multiple rotating axis structures. Specifically, six rotating axes are set from the neck to the hips, each corresponding to a different part of the body, forming a continuous support surface to ensure overall fit and comfort. The rotating axes cooperate with each other through the bracket structure and transmission components, achieving both static fit and support, and also enabling coordinated adjustment of the waist during backward tilting. When the user leans back, this invention utilizes the combined force of the user's own weight and the natural force of leaning back to drive the internal torque transmission system, causing the lumbar support structure to dynamically adjust accordingly, always maintaining a close fit with the user's back. This linkage adjustment process requires no manual operation and is triggered entirely by the user's posture changes, improving the seat's adaptability and ease of use.

[0021] The headrest adjustment bracket assembly includes a support rod 17 that is inserted into the top of the back support slide 12. A mounting base 18 is hinged to the top of the support rod 17. A first human body fitting rotating member 3 is installed on the front side of the mounting base 18, making the installation of the headrest adjustment bracket assembly convenient. The first human body fitting rotating member 3 can rotate to fit the head of the human body.

[0022] The back support assembly 11 is mounted on the top of the back bracket 9 via the first positive pressure rotating shaft pressure member 19, allowing the back support assembly 11 to rotate and more easily fit the back of the human body.

[0023] The back support slider 12 is installed on the front side of the back support main support 11 via the second positive pressure rotating shaft pressure member 20, so that the back support slider 12 can slide and rotate, making it easier to fit the back of the human body.

[0024] The upper conversion bracket 13 is installed on the back support sliding member 12 through the third positive pressure rotating shaft pressure member 21, so that the upper conversion bracket 13 can rotate and more easily fit the back of the human body.

[0025] The bottom of the upper shaft 15 is installed on the lower part of the back support main support 11 via the fourth positive pressure rotating shaft pressure member 22, so that the upper shaft 15 can rotate and more easily fit the waist of the human body.

[0026] The front side of the headrest adjustment bracket assembly is hinged to the rear side of the first human body fitting rotating part 3, allowing the first human body fitting rotating part 3 to rotate and more easily fit the human head.

[0027] The front side of the upper conversion bracket 13 is hinged to the rear side of the second body-fitting rotating component 4, and the front side of the upper conversion bracket 13 is hinged to the rear side of the third body-fitting rotating component 5, so that both the second body-fitting rotating component 4 and the third body-fitting rotating component 5 can rotate, making it easier to fit the back of the human body.

[0028] The front side of the lower conversion bracket 14 is hinged to the rear side of the fourth body-fitting rotating component 6, and the front side of the lower conversion bracket 14 is hinged to the rear side of the fifth body-fitting rotating component 7, so that both the fourth body-fitting rotating component 6 and the fifth body-fitting rotating component 7 can rotate, making it easier to fit the back and waist of the human body.

[0029] Torque (transmission) self-weight explanation: The torque transmission of this product uses the user's own weight G1 when sitting down and the natural force G2 generated by leaning back to form a composite force, which is transmitted through the Z-axis to HL1 to HL2 to cause elastic deformation, completing the conversion of linear force into torque. This torque is then transmitted through the C and E-axis, driving the B and D-axis to swing synchronously along a preset trajectory. In conjunction with the J-axis, the A9 generates a reverse support torque. The Z-axis evenly transmits the torque to the sixth body-fitting component 8. Throughout the process, the torque is adaptively generated and transmitted through the triggering and conversion of self-weight and the coordinated transmission of multiple axes. Furthermore, during the torque transmission process, the support structure adapts to the user's tilt and leans back, ensuring the synchronicity of support and transmission.

[0030] Linkage Methods - Relationships: When the user is seated, the A pivot, acting as the rotation axis between HL1 and HL2 and between KL1 and KL2, is responsible for receiving the combined effects of the user's weight and the backward tilting force. The J, D, and B pivots form a parallel axis system of the fourth body-fitting rotating component 6 and the fifth body-fitting rotating component 7, ensuring that the fitting components in the waist area maintain synchronous movement during tilting.

[0031] The C-axis serves as the linkage shaft for the overall support of the first and second human-fitting rotating components 3 and 4. It is responsible for transmitting torque from HL1 and HL2 to the upper structure, with a transmission distance from HLA to HLB, thus achieving force transmission from the waist to the neck. The E-axis is the center offset axis generated by the A-axis during the movement from HL1 to HL2. Its trajectory is from EL-1 to EL-2, ensuring the stability and continuity of torque transmission.

[0032] The F-axis, serving as the body-fitting axis for the second and third body-fitting rotating components 4 and 5, is responsible for adjusting the fitting angle of the middle section of the back support, allowing the support to adaptively adjust to the curve of the human back. During force transmission, GB1 and GB2, acting as the trajectory of the reaction force of G1 when the chassis is in use, form a balanced force system with G1, ensuring the stability of the overall structure.

[0033] Pitching working principle When a user rides on the vehicle, two natural forces are generated: a downward gravitational force G1 and a backward leaning force G2. G1 and G2 are transmitted together to the Z-axis (force input point), and the resultant force acts on the HL1 and HL2 elastic deformation components.

[0034] After being subjected to force, HL1 and HL2 undergo elastic deformation, converting the linear force into torque, which is then transmitted to shaft B (transmission shaft) and shaft E (transmission shaft), respectively.

[0035] The B-axis, with the J-axis (support axis) as its fulcrum, generates a supporting torque in the opposite direction to the C-axis (adjustment axis), forming a stabilizing force system to balance the forces at the front and rear. At the same time, the C-axis and the D-axis swing synchronously, coordinating with the E-axis to coordinate the movement of the rear section of the back support component 11, ensuring the structural stability throughout the pitching cycle.

[0036] The F-axis and Z-axis rotate synchronously, evenly distributing the backward tilting torque to the sixth body-fitting component 8, ultimately achieving the adaptive torque effect of the support, allowing the body to receive a close, stable, and suitable support experience at every angle it leans against.

[0037] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An adaptive ergonomic back support for an office chair, characterized in that: The device includes a chassis, a support assembly mounted on the rear side of the chassis, and a first, second, third, fourth, and fifth human body-fitting rotating component mounted sequentially from top to bottom on the support assembly. A sixth human body-fitting component is mounted on the top of the chassis.

2. The adaptive human back support for the office chair according to claim 1, characterized in that: The support assembly includes a back corner bracket and a back connector connected to the rear side of the chassis. A back support main support is hinged to the top of the back corner bracket. A back support slider is slidably connected to the front side of the back support main support. A headrest adjustment support assembly is mounted on the top of the back support slider. A first body-fitting rotating component is mounted on the front side of the headrest adjustment support assembly. An upper conversion bracket is hinged to the front side of the back support slider. The second and third body-fitting rotating components are mounted on the upper conversion bracket. On the front side of the support, the rear side of the fourth body-fitting rotating component and the rear side of the fifth body-fitting rotating component are connected to a lower conversion support. The bottom of the back support sliding component is hinged to an upper shaft. The top of the upper shaft is hinged to the middle of the lower conversion support. The bottom of the upper shaft is hinged to the lower part of the back support main support. The rear side of the back connector is slidably connected to a lower shaft. The top of the lower shaft is hinged to the lower part of the lower conversion support. The lower part of the lower shaft is hinged to the bottom of the back support main support.

3. The adaptive human back support for the office chair according to claim 2, characterized in that: The headrest adjustment bracket assembly includes a support rod inserted into the top of the back support sliding member, and a mounting base is hinged to the top of the support rod. The first human-fitting rotating member is mounted on the front side of the mounting base.

4. The adaptive human back support for the office chair according to claim 2, characterized in that: The back support frame is mounted on top of the back corner bracket via a first positive pressure rotating shaft clamp.

5. The adaptive human back support for the office chair according to claim 2, characterized in that: The back support sliding member is installed on the front side of the back support main support member via the second positive pressure rotating shaft pressure member.

6. The adaptive human back support for the office chair according to claim 2, characterized in that: The upper conversion bracket is installed on the back bracket sliding member via a third positive pressure rotating shaft pressure member.

7. The adaptive human back support for the office chair according to claim 2, characterized in that: The bottom of the upper shaft is installed on the lower part of the back support main support through the fourth positive pressure rotating shaft pressure member.

8. The adaptive human back support for the office chair according to claim 2, characterized in that: The front side of the headrest adjustment bracket assembly is hinged to the rear side of the first body-fitting rotating component.

9. The adaptive human back support for the office chair according to claim 2, characterized in that: The front side of the upper conversion bracket is hinged to the rear side of the second human body-fitting rotating component, and the front side of the upper conversion bracket is hinged to the rear side of the third human body-fitting rotating component.

10. The adaptive human back support for the office chair according to claim 2, characterized in that: The front side of the lower conversion bracket is hinged to the rear side of the fourth body-fitting rotating component, and the front side of the lower conversion bracket is hinged to the rear side of the fifth body-fitting rotating component.

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