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CN-224206489-U - Backrest structure and office chair

CN224206489UCN 224206489 UCN224206489 UCN 224206489UCN-224206489-U

Abstract

The utility model discloses a backrest structure and an office chair, wherein the backrest structure comprises two backrest parts, the two backrest parts are arranged in sequence along the vertical direction, a first gap is arranged between the two backrest parts, elastic parts are connected between the two backrest parts, and two ends of the elastic parts are arranged at the rear sides of the two backrest parts in a one-to-one correspondence manner. When the chair is used, a user sits on the front surface of the backrest, the backrest is required to lean backwards after sitting for a long time to stretch the body for relief, the backrest is fixed at the lower part, which is connected with the chair frame of the office chair, and the backrest swings backwards relative to the backrest at the lower part, so that the physiological lordosis of the lumbar spine of the user is temporarily increased, the vertebral body clearance is slightly enlarged, the pressure caused by sitting for a long time or bending is released, and the elastic piece is arranged to enable the backrest at the upper part to swing forwards and recover, so that the trunk of the user is supported. The office chair comprises a chair frame, a cushion and the backrest structure.

Inventors

  • YE ZIQI
  • XU DIANXIONG
  • Lin Xiongdan
  • ZUO BOLIANG
  • DENG GUOYU

Assignees

  • 佛山市虹桥家具有限公司

Dates

Publication Date
20260508
Application Date
20250513

Claims (10)

  1. 1. A backrest structure is characterized by comprising two backrest components, wherein the two backrest components are arranged in sequence along the vertical direction, a first gap is arranged between the two backrest components, the backrest components are provided with a backrest front surface facing a user and a backrest back surface facing the user, the orientation of the backrest front surface relative to the backrest back surface is used as the front, elastic pieces are connected between the two backrest components, and two ends of each elastic piece are arranged at the rear sides of the two backrest components in a one-to-one correspondence mode.
  2. 2. The backrest structure of claim 1, wherein the number of the elastic members is two, and the two elastic members are spaced apart.
  3. 3. The backrest structure of claim 1, wherein the backrest member has a support plate disposed vertically and a flexible cushion disposed on a front side of the support plate.
  4. 4. The backrest structure of claim 3, wherein a connecting seat is connected between the elastic member and the backrest member, the connecting seat having a first connecting portion in a sheet shape, the first connecting portion being fitted to the support plate.
  5. 5. The backrest structure of claim 4, wherein the elastic member is a spring.
  6. 6. The backrest structure of claim 5, wherein the connecting base has a second connecting portion, the second connecting portion is inserted into an end portion of the spring, the second connecting portion is provided with an external thread, and the second connecting portion is in threaded connection with the spring.
  7. 7. The backrest structure of claim 6, wherein the connecting base has a third connecting portion connected between the first connecting portion and the second connecting portion, the third connecting portion being provided with a receptacle extending in a radial direction of the second connecting portion.
  8. 8. An office chair characterized by comprising a chair frame, a cushion and a backrest structure according to any one of claims 1 to 7, wherein the cushion and the backrest structure are both arranged on the chair frame, and the cushion is positioned on the front lower side of the backrest structure.
  9. 9. The office chair of claim 8, wherein the outer side of the backrest structure is provided with a skin.
  10. 10. The office chair according to claim 8, wherein the chair frame is provided with two armrests, a cross beam is arranged on the rear side of the backrest structure, the cross beam is arranged on the side of the first gap, and two ends of the cross beam are respectively connected with the two armrests.

Description

Backrest structure and office chair Technical Field The utility model relates to the field of furniture, in particular to a backrest structure and an office chair. Background In order to enable a user to recline after sitting for a long time to stretch the body for relief, an office chair capable of adjusting the backrest angle is developed and manufactured, however, the office chair is adjusted by adjusting the backrest in the whole way, and the waist is still arched when the user reclines, so that the purpose of stretching and relieving the waist cannot be achieved, and still there is room for improvement. Disclosure of utility model The present utility model aims to solve at least one of the technical problems existing in the prior art. Therefore, the utility model provides a backrest structure and an office chair. According to the backrest structure of the embodiment of the first aspect of the utility model, the backrest structure comprises two backrest parts, the two backrest parts are arranged in sequence in the vertical direction, a first gap is arranged between the two backrest parts, the backrest parts are provided with a backrest front surface facing a user and a backrest back surface facing the user, the backrest front surface is oriented to the backrest back surface as the front, elastic pieces are connected between the two backrest parts, and two ends of each elastic piece are arranged at the rear sides of the two backrest parts in a one-to-one correspondence mode. The backrest structure according to the first aspect of the utility model has at least the technical effects that when a user sits on the front surface of the backrest of the office chair, and the user needs to lean backwards to stretch the body for relief after sitting for a long time, the lower backrest connected with the chair frame of the office chair is kept fixed, the upper backrest swings backwards relative to the lower backrest, so that the physiological lordosis of the lumbar spine of the user is temporarily increased, the vertebral body clearance is slightly enlarged, the pressure caused by sitting or bending is released, and the elastic piece is arranged to enable the upper backrest to swing forwards and recover, so that the support of the trunk of the user is maintained. According to some embodiments of the utility model, the number of the elastic members is two, and the two elastic members are spaced apart. According to some embodiments of the utility model, the back-rest element has a vertically arranged support plate and a flexible cushion provided on the front side of the support plate. According to some embodiments of the utility model, a connection seat is connected between the elastic element and the backrest part, the connection seat having a first connection portion in the form of a sheet, the first connection portion being in abutment with the support plate. According to some embodiments of the utility model, the elastic member is a spring. According to some embodiments of the utility model, the connecting seat has a second connecting portion, the second connecting portion is inserted into an end portion of the spring, the second connecting portion is provided with external threads, and the second connecting portion is in threaded connection with the spring. According to some embodiments of the utility model, the connection socket has a third connection portion connected between the first connection portion and the second connection portion, the third connection portion being provided with a receptacle extending in a radial direction of the second connection portion. According to a second aspect of the utility model, an office chair comprises a chair frame, a seat cushion and the backrest structure, wherein the seat cushion and the backrest structure are both arranged on the chair frame, and the seat cushion is arranged on the front lower side of the backrest structure. The office chair according to the second aspect of the present utility model has at least the technical effects that by providing the backrest structure described above, when a user needs to lean back to stretch his body for relief after sitting for a long time, the lower backrest connected to the chair frame is kept fixed, and the upper backrest swings backward relative to the lower backrest, so that the physiological lordosis of the lumbar spine of the user is temporarily increased, and the vertebral body gap is slightly enlarged, and the pressure caused by sitting or bending is released. According to some embodiments of the utility model, the outside of the backrest structure is provided with a skin. According to some embodiments of the utility model, the chair frame is provided with two armrests, the back side of the backrest structure is provided with a cross beam, the cross beam is arranged beside the first gap, and two ends of the cross beam are respectively connected with the two armrests. Additional aspects and advantages of the utility