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CN-224206483-U - Chair back structure

CN224206483UCN 224206483 UCN224206483 UCN 224206483UCN-224206483-U

Abstract

The application discloses a chair back structure of a chair, which comprises a chair back body frame, a lumbar support frame and a spring assembly, wherein the chair back body frame comprises a first beam part, a second beam part and a mounting part which are integrally formed from top to bottom, the front side of the second beam part is detachably connected with the upper part of the lumbar support frame, and the lower part of the lumbar support frame is connected with the two sides of the chair back body frame through the spring assembly. The waist is leaned on the frame and is set up in the front side of back of the chair body frame, can give better support of user's waist, can dismantle with back of the chair body frame through the upper portion of waist and lean on the frame and be connected, and the lower part of waist is leaned on the frame and is passed through spring assembly and is connected with back of the chair body frame, not only makes the waist lean on the frame and the equipment process of back of the chair body frame become simple, and spring assembly provides corresponding holding power in the lower part of waist lean on the frame moreover, makes the waist lean on the frame and is connected more firm with back of the chair body frame.

Inventors

  • LI SHENGGUO

Assignees

  • 黎明国际智能家具(深州)有限公司

Dates

Publication Date
20260508
Application Date
20250515

Claims (6)

  1. 1. The utility model provides a chair back structure of chair, its characterized in that includes back of the chair body frame, waist lean on frame and spring assembly, back of the chair body frame includes from last first crossbeam portion, second crossbeam portion and the installation department that down integrated into one piece set up, the front side of second crossbeam portion with the upper portion of waist lean on the frame is dismantled and is connected, the lower part of waist lean on the frame pass through spring assembly connect in back of the chair body frame's both sides.
  2. 2. The chair back structure of the chair according to claim 1, wherein a limit groove is formed in the front side of the second beam portion, a first mounting hole is formed in the limit groove, a protruding portion matched with the limit groove is formed in the rear side of the upper portion of the lumbar support frame, a second mounting hole is formed in the protruding portion, the protruding portion is assembled in the limit groove, the first mounting hole is opposite to the second mounting hole, and a fixing screw is mounted in the first mounting hole and the second mounting hole.
  3. 3. The chair back structure of claim 2, wherein a first clamping groove is formed in the rear side of the lower portion of the lumbar support frame, a second clamping groove corresponding to the first clamping groove is formed in the chair back body frame, and two ends of the spring assembly are respectively mounted on the first clamping groove and the second clamping groove.
  4. 4. A chair back structure of a chair according to claim 3, wherein the spring assembly comprises a spring member, a spring housing and a spring pin, the spring housing is disposed on the outer side of the spring member, one ends of the spring member and the spring housing are fixed on the first clamping groove through the spring pin, and the other ends of the spring member and the spring housing are fixed on the second clamping groove through the spring pin.
  5. 5. The back structure of a chair of claim 2, further comprising a marker detachably disposed on a rear side of the back body frame and covering the first mounting hole.
  6. 6. The back structure of a chair according to claim 1, further comprising a headrest connection block, wherein the headrest connection block comprises a connection block body and a fixing plate detachably connected with the connection block body, the connection block body is connected with the fixing plate to form a fixing groove, the headrest connection block is clamped on the first beam portion through the fixing groove, and a sliding groove is formed in the connection block body and is used for connecting a headrest piece.

Description

Chair back structure Technical Field The application relates to the technical field of chairs, in particular to a chair back structure of a chair. Background With the rise of ergonomic demands in modern office and home settings, chair lumbar support structure design has become an important research direction in the field of functional chairs. The chair back structure of the traditional chair generally adopts an integral curved surface design, and can be attached to the human spine curve to a certain extent, but the chair has poorer leaning comfort in actual use. The existing chairs on the market have the defects that the waist rest is added to improve the comfort of the chair, firstly, parts used when the waist rest is connected with the chair back body are too many, assembly procedures are complicated, secondly, the joint of the waist rest and the chair back body is weak, and connecting parts are easy to damage. Disclosure of utility model Therefore, the application provides a chair back structure of a chair, which solves the technical problems of complicated assembly of the chair back and weak joint of the lumbar support and the chair back body in the prior art. In order to achieve the above object, the present application provides the following technical solutions: The utility model provides a chair back structure of chair, includes back of the chair body frame, waist lean on frame and spring assembly, back of the chair body frame includes from last to first crossbeam portion, second crossbeam portion and the installation department that lower integrated into one piece set up, the front side of second crossbeam portion with the upper portion of waist lean on the frame can be dismantled and be connected, the lower part of waist lean on the frame pass through spring assembly connect in back of the chair body frame's both sides. Optionally, the front side of second crossbeam portion is provided with the spacing groove, be provided with first mounting hole in the spacing groove, the rear side of the upper portion of lumbar support frame be provided with spacing groove looks adaptation bellying, be provided with the second mounting hole on the bellying, the bellying assemble in the spacing groove, first mounting hole with the second mounting hole is relative, first mounting hole with install set screw in the second mounting hole. Further alternatively, a first clamping groove is formed in the rear side of the lower portion of the lumbar support frame, a second clamping groove corresponding to the first clamping groove is formed in the chair back body frame, and two ends of the spring assembly are respectively mounted on the first clamping groove and the second clamping groove. Further alternatively, the spring assembly includes a spring member, a spring housing, and a spring pin, where the spring housing is disposed on an outer side of the spring member, one ends of the spring member and the spring housing are fixed on the first clamping groove through the spring pin, and the other ends of the spring member and the spring housing are fixed on the second clamping groove through the spring pin. Optionally, the chair back structure further includes a marker, wherein the marker is detachably disposed on the rear side of the chair back body frame and covers the first mounting hole. Optionally, the back of the chair structure still includes the headrest connecting block, the headrest connecting block includes the connecting block body and can dismantle the fixed plate of connection, the connecting block body with the fixed plate is connected and is formed the fixed slot, the headrest connecting block passes through the fixed slot joint in on the first crossbeam portion, be provided with the spout on the connecting block body, the spout is used for connecting the headrest spare. Compared with the prior art, the application has at least the following beneficial effects: The utility model provides a chair back structure of chair, includes back of the chair body frame, waist lean on frame and spring assembly, and back of the chair body frame includes from last to first crossbeam portion, second crossbeam portion and the installation department that down integrated into one piece set up, and the front side of second crossbeam portion is connected with the upper portion of waist lean on the frame can be dismantled, and the lower part of waist lean on the frame passes through spring assembly and connects in the both sides of back of the chair body frame. The waist is leaned on the frame and is set up in the front side of back of the chair body frame, can give better support of user's waist, can dismantle with back of the chair body frame through the upper portion of waist and lean on the frame and be connected, and the lower part of waist is leaned on the frame and is passed through spring assembly and is connected with back of the chair body frame, not only makes the waist lean on the frame and the equipment process of b