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CN-218605817-U - Chair waist rest capable of being fixed in front and back

CN218605817UCN 218605817 UCN218605817 UCN 218605817UCN-218605817-U

Abstract

A chair waist support capable of being positioned in front and back comprises a base arranged on a chair backrest, wherein the base is provided with a fixing groove facing the back of a user, a positioning sleeve is fixedly connected in the fixing groove, and a plurality of ratchets facing the direction consistent with the opening direction of the positioning sleeve are arranged on the inner wall below the positioning sleeve; a waist rest connecting seat is movably connected in the positioning sleeve, a ratchet rod matched with the ratchet is arranged in the waist rest connecting seat, and the ratchet rod are mutually occluded for positioning. The utility model discloses overall structure is succinct, and the installation is simple, and the cost is lower to connected mode is reliable, has the waist of easily operating and leans on front and back gear fixing structure, can be by the wide application in the middle of adjusting the seat that has needs, especially office chair product to the waist.

Inventors

  • HU CHUNCHENG

Assignees

  • HU CHUNCHENG

Dates

Publication Date
20230314
Application Date
20221123
Priority Date
20221123

Claims (7)

  1. 1. A chair waist support capable of being positioned in front and back comprises a base arranged on a chair backrest, wherein the base is provided with a fixing groove facing the back of a user; a waist rest connecting seat is movably connected in the positioning sleeve, a ratchet rod matched with the ratchet is arranged in the waist rest connecting seat, and a section of reset plane is arranged on the positioning sleeve close to an opening of the positioning sleeve; the ratchet rod articulates locate the waist lean on in the connecting seat with in the strip shaft hole that the ratchet suited towards, the expansion end of ratchet rod be equipped with ratchet complex meshing portion, be equipped with the portion of reseing adjacent to meshing portion, be equipped with adjacent to the portion of reseing and lean on the reset spring that the connecting seat is inconsistent with the waist with meshing portion in different sides, the expansion end of ratchet rod articulates in locating the L type shaft hole in the connecting seat is leaned on to the waist.
  2. 2. The chair lumbar support capable of being shifted forward and backward according to claim 1, wherein the ratchet rod is provided with a reset section near the axis thereof, and the reset section is a plane.
  3. 3. The chair lumbar support capable of being shifted forwards and backwards according to claim 1, wherein the ratchet rod and the return spring are connected with each other in a sleeved manner through a positioning shaft arranged at the movable end of the ratchet rod, and a positioning groove which is abutted against the return spring is arranged in the lumbar support connecting seat.
  4. 4. The chair lumbar support capable of being shifted forward and backward according to claim 1, wherein an interference portion adjacent to the ratchet is provided at an innermost side in an opening direction of the positioning sleeve, and a height of the interference portion is higher than a height of the reset portion at a swing limit position.
  5. 5. The chair lumbar support capable of being positioned in front and back directions according to claim 4, wherein the positioning sleeve comprises a main cylinder body abutting against the inner wall of the fixing groove, and a side plate provided with the ratchet teeth, the abutting portion, the reset plane and the side wall close cover connected with the main cylinder body.
  6. 6. A chair lumbar support capable of being positioned in front and back directions as claimed in claim 5, wherein a guide block is provided at the center of one side of said side plate near said main cylinder body, said guide block being aligned with the length direction of said main cylinder body, and a groove for engaging with said guide block is provided at the end of said lumbar support connecting seat facing away from said fixing groove.
  7. 7. A chair lumbar support capable of being shifted forward and backward as claimed in claim 1, wherein a backrest connecting plate is provided at an end of the lumbar support connecting seat facing away from the fixing groove.

Description

Chair waist rest capable of being fixed in front and back Technical Field The utility model relates to the technical field of accessories of office seats, in particular to a chair waist rest which is used for office chair backrest part and can be fixed in front and back. Background The chair waist rest is a supporting component which is independent relative to the chair backrest, and the design and the manufacture aims at ensuring that the back of a person is not well relaxed if the person leans against the vertical chair backrest when the person is relaxed, particularly, the waist part is often easily suspended and cannot be supported, so that the lumbar of the user is influenced to a certain extent over time, and the lumbar disease is more easily induced to the user. The office chair mainly aims at people who sit for a long time, the waist of the office chair is often required to be supported enough to reduce fatigue caused by long-time work of a user, the waist rest adjusting structure of the office chair is designed for the purpose, for example, in a waist rest adjusting mechanism disclosed in publication No. CN109907567A in 2019, 6, 21, a waist rest structure connected with a chair backrest in a swing rod mode is disclosed, the front and back position adjustment of the waist rest structure is realized by changing the angle between the swing rod and the backrest and assisting the up and down lifting structure of the swing rod, and different user requirements are met. However, the above structure is relatively complex, the operation of changing the position is relatively complicated, and the manufacturing cost of the office chair is affected to some extent, so that there is still room for further optimization. SUMMERY OF THE UTILITY MODEL To the technical defect who exists in the background art, the utility model provides a chair waist that can decide shelves around can leans on has solved above-mentioned technical problem and has satisfied the actual demand, and concrete technical scheme is as follows: a chair waist support capable of being positioned in front and back comprises a base arranged on a chair backrest, wherein the base is provided with a fixing groove facing the back of a user, a positioning sleeve is fixedly connected in the fixing groove, and a plurality of ratchets facing the direction consistent with the opening direction of the positioning sleeve are arranged on the inner wall below the positioning sleeve; a waist rest connecting seat is movably connected in the positioning sleeve, a ratchet rod matched with the ratchet is arranged in the waist rest connecting seat, and a section of reset plane is arranged on the positioning sleeve close to an opening of the positioning sleeve; the ratchet rod is hinged in a strip-shaped shaft hole which is formed in the waist-leaning connecting seat and is matched with the direction of the ratchets, the movable end of the ratchet rod is provided with a meshing portion matched with the ratchets, a reset portion is arranged adjacent to the meshing portion, a reset spring which is abutted against the waist-leaning connecting seat is arranged adjacent to the reset portion and is positioned at different sides of the meshing portion, and the movable end of the ratchet rod is hinged in an L-shaped shaft hole which is formed in the waist-leaning connecting seat. As a further technical scheme of the utility model, the axle center that the ratchet pole is close to self is equipped with a reset section, the reset section is one section plane. As a further technical scheme of the utility model, the ratchet pole with reset spring cup joints each other through locating the location axle on the ratchet pole expansion end and links to each other, be equipped with in the waist by the connecting seat with the inconsistent constant head tank of reset spring. As a further technical scheme of the utility model, the innermost side of position sleeve's opening direction is equipped with the conflict portion adjacent with the ratchet, the height that highly is higher than of conflict portion the height of portion that resets when swing extreme position. As a further technical scheme of the utility model, the position sleeve include with the inconsistent main barrel of fixed slot inner wall, and be equipped with ratchet, conflict portion, the plane that resets, with the curb plate that the lateral wall of main barrel closed the lid and connects. As a further technical scheme of the utility model, the central authorities that the curb plate is close to main barrel body one side are provided with a guide block unanimous with main barrel body length direction, the waist leans on the one end that the connecting seat deviates from the fixed slot to be equipped with guide block complex recess. As a further technical scheme of the utility model, the one end that the waist leans on the connecting seat to deviate from the fixed slot is equipped with the back connecting plate. The util