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CN-224219777-U - Office chair with adjustable backrest angle

CN224219777UCN 224219777 UCN224219777 UCN 224219777UCN-224219777-U

Abstract

The utility model relates to the technical field of office chair devices, in particular to an office chair with an adjustable backrest angle, which comprises an office chair component, wherein the office chair component comprises a seat plate, handrail plates are arranged on two sides of the seat plate, a backrest is arranged on the back of the seat plate, a supporting mechanism is fixedly arranged at the bottom of the seat plate, the angle adjusting mechanism comprises a fixed seat, a box body and a rotating column, the rotating column is limited and rotatably connected between two side walls of the fixed seat and the box body, the fixed seat and the box body are fixedly arranged on the seat plate, and the backrest is fixedly arranged on the rotating column and further comprises a rotating mechanism for enabling the rotating column to rotate and an error touch preventing mechanism for preventing the rotating mechanism from operating. The device can be convenient for adjust the angle of back, and can prevent that the foreign object from striking or maloperation from leading to the back by the wrong angle of adjusting.

Inventors

  • LI ZHIFANG

Assignees

  • 嘉兴市永泰五金塑料有限责任公司

Dates

Publication Date
20260512
Application Date
20250708

Claims (7)

  1. 1. An office chair with an adjustable back angle, comprising: The office chair comprises a seat board (8), wherein handrail boards (2) are arranged on two sides of the seat board (8), a backrest (1) is arranged on the back of the seat board (8), and a supporting mechanism is fixedly arranged at the bottom of the seat board (8); The angle adjusting mechanism comprises a fixed seat (7), a box body (9) and a rotating column (13), wherein the rotating column (13) is connected between the fixed seat (7) and two side walls of the box body (9) in a limiting rotation mode, the fixed seat (7) and the box body (9) are fixedly installed on a seat board (8), the backrest (1) is fixedly installed on the rotating column (13), and the angle adjusting mechanism further comprises a rotating mechanism enabling the rotating column (13) to rotate and an error touch preventing mechanism preventing operation of the rotating mechanism.
  2. 2. The office chair with the adjustable backrest angle according to claim 1, wherein the supporting mechanism comprises a supporting rod (3), the supporting rod (3) is fixedly installed at the bottom center of the seat plate (8), a base (4) is fixedly connected to the bottom of the supporting rod (3), and a plurality of inclined supporting plates (5) are circumferentially distributed at the bottom of the base (4).
  3. 3. An office chair with an adjustable backrest angle according to claim 2, characterized in that the bottom of the diagonal stay (5) is fixedly provided with universal wheels (6).
  4. 4. The office chair with the adjustable backrest angle according to claim 1, characterized in that the rotating mechanism comprises a worm wheel (17), the rotating columns (13) are simultaneously and limitedly connected to two side walls of the box body (9) in a rotating mode, the worm wheel (17) is fixedly arranged on the outer wall of the rotating column (13) arranged inside the box body (9), a worm (16) is connected to the top and the bottom of the box body (9) in a limiting rotating mode, the worm (16) is meshed with the worm wheel (17), a spline shaft sleeve (19) is connected to the top limiting rotation of the box body (9), the spline shaft sleeve (19) is fixedly connected with one end of the worm (16), a spline shaft (20) is connected to the spline shaft sleeve (19) in a limiting sliding mode, and a rotating wheel (15) is fixedly arranged on the top of the spline shaft (20).
  5. 5. The office chair with the backrest angle adjustable according to claim 4, wherein the anti-false touch mechanism comprises a sleeve (10), the sleeve (10) is fixedly installed at the top of the box body (9), the spline shaft sleeve (19) is arranged in the sleeve (10), limit sliding grooves (11) are formed in the front side and the rear side of the sleeve (10), auxiliary limit plates (21) are fixedly installed on the front side and the rear side of the spline shaft (20) close to the top, the two auxiliary limit plates (21) can be respectively in limit sliding connection with the two limit sliding grooves (11), and when the auxiliary limit plates (21) slide to the bottoms of the limit sliding grooves (11), the rotating wheels (15) are arranged in the sleeve (10).
  6. 6. The office chair with the adjustable backrest angle according to claim 5, wherein the rotating column (13) is provided with a threaded hole (14), the backrest (1) is provided with a round hole (18) matched with the threaded hole (14), and the backrest (1) is fixedly arranged on the rotating column (13) through the cooperation of screws, the threaded hole (14) and the round hole (18).
  7. 7. An office chair with adjustable back angle according to claim 6, characterized in that the worm (16) is placed on the side of the worm wheel (17) close to the armrest plate (2).

Description

Office chair with adjustable backrest angle Technical Field The utility model relates to the technical field of office chair devices, in particular to an office chair with an adjustable backrest angle. Background Office chairs are various chairs equipped for convenience in daily work and social activities. OfficeMate office partners divide office chairs into a narrow sense and a broad sense, wherein the narrow sense office chair refers to a backrest chair for a person to sit on when doing a tabletop work in a sitting posture state, and the broad sense office chair refers to all chairs used in offices, including office chairs, middle office chairs, guest chairs, staff chairs, conference chairs, guest chairs, training chairs and the like. Sometimes we need to adjust the back angle of the office chair so that it is more comfortable to sit or lean on. Often the angular adjustment is cumbersome and requires re-disassembly of the screws and re-installation of the backrest. In order to adjust the backrest more conveniently, the office chair which is pushed out newly is provided with a rotating handle for adjusting the angle of the backrest, then the rotating handle is usually exposed outside, and at the moment, the rotating handle can be impacted by external objects, so that the rotating handle rotates for a certain angle, and the angle of the backrest is changed. Therefore, the office chair with the backrest angle capable of being adjusted is designed, the backrest angle can be conveniently adjusted, and the backrest angle can be prevented from being adjusted by mistake due to foreign object collision or misoperation. Disclosure of utility model The utility model aims to overcome the defects in the prior art, and provides an office chair capable of adjusting the angle of a backrest, which can be used for conveniently adjusting the angle of the backrest and preventing the backrest from being misadjusted due to foreign object collision or misoperation. In order to solve the technical problems, the utility model adopts the technical scheme that the office chair with the backrest angle adjustable comprises: The office chair comprises a seat board, wherein handrail plates are arranged on two sides of the seat board, a backrest is arranged on the back of the seat board, and a supporting mechanism is fixedly arranged at the bottom of the seat board; The angle adjusting mechanism comprises a fixed seat, a box body and a rotating column, wherein the rotating column is connected between the fixed seat and two side walls of the box body in a limiting rotation mode, the fixed seat and the box body are fixedly installed on a seat board, the backrest is fixedly installed on the rotating column, and the angle adjusting mechanism further comprises a rotating mechanism enabling the rotating column to rotate and an error touch preventing mechanism preventing the rotating mechanism from operating. Further, the supporting mechanism comprises a supporting rod, the supporting rod is fixedly installed at the center of the bottom of the seat plate, the bottom of the supporting rod is fixedly connected with a base, and a plurality of inclined supporting plates are distributed on the circumference of the bottom of the base. Further, universal wheels are fixedly arranged at the bottom of the inclined supporting plate. Further, the slewing mechanism comprises a worm wheel, the slewing column is simultaneously and limitedly rotationally connected on two side walls of the box body, the worm wheel is fixedly arranged on the outer wall of the slewing column in the box body, the worm is connected with the worm in a joint limiting rotation manner at the top and the bottom of the box body, the worm is meshed with the worm wheel, the spline shaft sleeve is connected with one end of the worm in a limiting rotation manner at the top of the box body, the spline shaft is fixedly connected with one end of the worm in a sliding manner, and a spline shaft is connected in a limiting manner in the spline shaft sleeve, and a rotating wheel is fixedly arranged at the top of the spline shaft. Further, the anti-false touch mechanism comprises a sleeve, the sleeve is fixedly arranged at the top of the box body, the spline shaft sleeve is arranged in the sleeve, limiting sliding grooves are formed in the front side and the rear side of the sleeve, auxiliary limiting plates are fixedly arranged on the front side and the rear side of the spline shaft, which are close to the top, the two auxiliary limiting plates can be respectively and slidably connected in the two limiting sliding grooves, and when the auxiliary limiting plates slide to the bottoms of the limiting sliding grooves, the rotating wheel is arranged in the sleeve. Further, a threaded hole is formed in the rotating column, a round hole matched with the threaded hole is formed in the backrest, and the backrest is fixedly installed on the rotating column through the cooperation of the screw, the threaded