Search

CN-122004614-A - Self-adaptive backrest, cushion and comfort adjusting office chair thereof

CN122004614ACN 122004614 ACN122004614 ACN 122004614ACN-122004614-A

Abstract

The invention is suitable for the field of office furniture, and provides a self-adaptive backrest, which comprises a self-adaptive expansion plate assembled on a backrest frame, wherein the self-adaptive expansion plate comprises a self-adaptive expansion bracket and a cushion, the self-adaptive expansion bracket is assembled on the backrest frame, the cushion is sleeved on the self-adaptive expansion bracket, the self-adaptive expansion bracket comprises a plurality of unit expansion brackets, each unit expansion bracket comprises a supporting cross rod and two expansion connecting structures, the two expansion connecting structures are distributed at two ends of the supporting cross rod and erect the supporting cross rod on the backrest frame, one side of each expansion connecting structure is fixed on the supporting cross rod, the other side of each expansion connecting structure is slidingly assembled on the backrest frame, the two expansion connecting structures synchronously expand and contract to adjust the distance between the plurality of unit expansion brackets, the cushion comprises a cushion frame, and the self-adaptive expansion plate is assembled between the cushion frame and the backrest frame.

Inventors

  • GU YONGQING

Assignees

  • 安吉顾友家具有限公司

Dates

Publication Date
20260512
Application Date
20260227

Claims (10)

  1. 1. The self-adaptive backrest (2) comprises a self-adaptive expansion plate (8) assembled on a backrest frame (7), and is characterized in that the self-adaptive expansion plate (8) comprises a self-adaptive expansion bracket (81) and a soft cushion (82), the self-adaptive expansion bracket (81) is assembled on the backrest frame (7), and the soft cushion (82) is sleeved on the self-adaptive expansion bracket (81), the self-adaptive expansion bracket (81) comprises a plurality of unit expansion brackets (83), and the plurality of unit expansion brackets (83) are sequentially connected side by side in parallel; The unit expansion bracket (83) comprises a supporting cross rod (84) and two expansion connecting structures (85), wherein the two expansion connecting structures (85) are distributed at two ends of the supporting cross rod (84) and erect the supporting cross rod (84) on the backrest frame (7), one side of each expansion connecting structure (85) is fixed on the supporting cross rod (84), the other side of each expansion connecting structure is assembled on the backrest frame (7) in a sliding mode, and the two expansion connecting structures (85) are synchronously expanded and contracted and used for adjusting the distance between the unit expansion brackets (83).
  2. 2. The self-adaptive backrest (2) according to claim 1, wherein the soft cushion (82) comprises a plurality of unit soft cushions, the unit soft cushions are in one-to-one correspondence with the unit telescopic frames (83), the unit soft cushions are sleeved on the unit telescopic frames (83), the unit soft cushion comprises an inner elastic block (822) and two outer soft cushion layers (821), the two outer soft cushion layers (821) are distributed on the upper side and the lower side of the inner elastic block (822), and the inner elastic block (822) is positioned between supporting cross bars (84) of the two unit telescopic frames (83).
  3. 3. The self-adaptive backrest (2) according to claim 1, wherein the telescopic connecting structure (85) comprises a telescopic rod (86), the telescopic rod (86) comprises a connecting block (861), a connecting column (864) and a telescopic rod body (865), the connecting block (861) and the telescopic rod body (865) are assembled together and distributed in a straight line, one end of the telescopic rod body (865) away from the connecting block (861) is assembled on the connecting block (861) of the adjacent telescopic rod (86), one end of the connecting column (864) is fixed on the connecting block (861), the other end of the connecting column (864) is fixed on the supporting cross rod (84), and the connecting column (864) and the telescopic rod body (865) are vertically distributed.
  4. 4. The self-adaptive backrest (2) according to claim 3, wherein the connecting block (861) is fixed with a guide slide block at one side far away from the connecting column (864), the guide slide block is assembled on the backrest frame (7) in a sliding way, and a limiting pin is arranged on the backrest frame (7) and used for limiting one unit expansion bracket (83).
  5. 5. The adaptive backrest (2) of claim 4, characterized in that the telescoping rod (865) comprises a pneumatic telescoping rod, a hydraulic telescoping rod, and an electric telescoping rod.
  6. 6. A cushion (4), including cushion frame (6), its characterized in that, cushion frame (6) is connected on back frame (7), on cushion frame (6) to and all be equipped with between cushion frame (6) and back frame (7) self-adaptation expansion plate (8) of claim (3).
  7. 7. The cushion (4) according to claim 6, wherein the telescopic connection structure (85) further comprises an elastic angle adjusting body (87), the elastic angle adjusting body (87) is elastically assembled on the connecting block (861) in a rotating way, the connecting block (861) is provided with a rotating groove (862), a supporting column (863) is fixed in the rotating groove (862), and the elastic angle adjusting body (87) is positioned in the rotating groove (862) and is elastically assembled on the supporting column (863) in a rotating way.
  8. 8. The seat cushion (4) according to claim 7, wherein the elastic angle adjusting body (87) comprises an outer positioning ring (871), an inner positioning ring (872) and two sealing rings (873), the outer positioning ring (871) is sleeved on the inner positioning ring (872), a column direction central line of the outer positioning ring (871) and a column direction central line of the inner positioning ring (872) are on the same straight line, the two sealing rings (873) are positioned on two sides of the outer positioning ring (871), the two sealing rings (873) are used for rotating and assembling the outer positioning ring (871) and the inner positioning ring (872), and the inner positioning ring (872) is sleeved and fixed on the support column (863).
  9. 9. The seat cushion (4) of claim 8, wherein a plurality of support blocks (874) are fixed on the outer wall of the inner positioning ring (872), the plurality of support blocks (874) are distributed in an annular array along the outer wall of the inner positioning ring (872), springs (875) are connected to the support blocks (874), the other ends of the springs (875) are connected to a connecting plate, the connecting plate is fixed on the inner wall of the outer positioning ring (871), a cavity is formed between the outer positioning ring (871), the inner positioning ring (872) and the two sealing rings (873), and the support blocks (874) and the springs (875) are all located inside the cavity.
  10. 10. The office chair with comfort adjustment comprises a cushion (4) according to claim 6 and an adaptive backrest (2) according to claim 3, and is characterized in that the cushion (4) is assembled on five-star feet (5), two sides of the cushion (4) are respectively provided with armrests (3), and a headrest (1) is additionally arranged on the top of the adaptive backrest (2).

Description

Self-adaptive backrest, cushion and comfort adjusting office chair thereof Technical Field The invention relates to the field of office furniture, in particular to a self-adaptive backrest, a cushion and a comfort adjusting office chair thereof. Background In modern office environments, office chairs are one of the most closely contacted devices for office staff, and their design and function directly affect the work efficiency and physical health of the user. With the transition of the working mode of the modern society, people need to process various matters before the office desk for a long time, and sedentary sitting becomes an office normalcy. The office chair conforming to ergonomics not only can provide basic sitting posture support and relieve spine pressure and muscle fatigue caused by long-time sitting, but also can effectively prevent occupational diseases such as cervical spondylosis, lumbar disc herniation and the like. Therefore, the design of office chairs gradually evolves from a simple utility tool to an office furniture core component integrating comfort, health and functionality, and the technical content and comfort standard are also continuously improved. In order to meet the sitting posture requirements of people with different body types, riding experience is improved, and various office chairs with comfort adjusting functions are currently available on the market. Such products typically have functional modules for seat cushion height adjustment, back tilt angle adjustment, armrest multi-way adjustment, and the like, with some high end products also being configured with adjustable lumbar support, headrest, and cushion depth adjustment mechanisms. Through these multidimensional physical adjustment, the user can initially adjust the office chair to the state of laminating personal body size to promote to a certain extent and sit the sense comfort level, adapt to the gesture switching demand under different scenes such as office, rest, discussion. However, despite the great progress in the adjustment function of the existing office chairs, there are significant limitations in practical use. The backrest length (i.e., the backrest longitudinal dimension) of most office chairs is fixed at the time of design and cannot be adaptively adjusted according to the upper body length of the user. Because the trunk length ratios of different people have obvious differences, the backrest with fixed length is difficult to simultaneously consider the shoulder support of the high-stature people and the waist positioning of the short-stature people, so that the waist is suspended or the shoulder support is insufficient. In addition, part of the adjusting mechanisms are complex to operate or limited in adjusting range, stepless and accurate adaptation cannot be achieved, and the actual comfort adjusting capability of the seat is further weakened. On the basis of realizing multi-dimensional adjustment, the problem of dynamic matching of the longitudinal support of the backrest and the size of the upper body of a human body is solved, and the technical bottleneck to be broken through in the current office chair comfort design field is urgent. Disclosure of Invention The embodiment of the invention aims to provide a self-adaptive backrest, a cushion and a comfort adjusting office chair thereof, and aims to solve the problems that the length of the backrest of the existing office chair is fixed, people with different upper body proportions cannot be comfortably adapted to take the chair, and the comfort adjusting performance is deviated. The self-adaptive backrest comprises a self-adaptive expansion plate which is assembled on a backrest frame, the self-adaptive expansion plate comprises a self-adaptive expansion bracket and a soft cushion, the self-adaptive expansion bracket is assembled on the backrest frame, the soft cushion is sleeved on the self-adaptive expansion bracket, the self-adaptive expansion bracket comprises a plurality of unit expansion brackets, the unit expansion brackets are sequentially connected in parallel side by side, each unit expansion bracket comprises a supporting cross rod and two expansion connection structures, the two expansion connection structures are distributed at two ends of the supporting cross rod and erect the supporting cross rod on the backrest frame, one side of each expansion connection structure is fixed on the supporting cross rod, the other side of each expansion connection structure is slidingly assembled on the backrest frame, the two expansion connection structures are synchronously expanded and contracted to adjust the distance between the unit expansion brackets, when facing to people with different body sizes, the self-adaptive expansion plate can start one part of the self-adaptive expansion bracket to be partially multiple or partially multiple unit expansion brackets, the unit expansion brackets are synchronously expanded and used for adjusting the dis