CN-224206491-U - Chair back structure capable of rotating along with sitting posture

Abstract

The utility model discloses a chair back structure capable of rotating along with sitting postures, which comprises a back support, a rotary support and a back frame, wherein the back frame is arranged on the rotary support, the rotary support is positioned in a clamping groove of the back support, a rotary pull rod is arranged on the back support, the lower parts of the rotary pull rod and the back frame are connected with the lower part of the rotary support through a lower connecting rod, the middle connecting position of the rotary support is connected with the upper part of the back support through an upper connecting rod, a spring piece is arranged between the rotary pull rod and the rotary support, one end of the spring piece is bent and is attached to the rotary pull rod, and the other end of the spring piece is abutted to the rotary support after being provided with a spring pressing piece. The chair back structure provided by the utility model changes the angle of the chair back by utilizing the change of gravity, and the rotating chair back structure can better support the back, so that the chair back structure can conveniently rotate along with sitting postures, and the chair back structure has the advantages of simple integral structure, reliable functions and convenience in assembly.

Inventors

• LI ZHIFANG

Assignees

• 嘉兴市永泰五金塑料有限责任公司

Dates

Publication Date

20260508

Application Date

20250529

Claims (3)

1. 1. Can follow position of sitting pivoted back of chair structure, a serial communication port, including back of body support (1), runing rest (6) and back of body frame (11), back of body frame (11) are located on runing rest (6), runing rest (6) are located the draw-in groove of back of body support (1), be provided with rotatory pull rod (3) on back of body support (1), the lower part of rotatory pull rod (3), back of body frame (11) and the lower part of runing rest (6) link to each other through lower connecting rod (7), the middle part of runing rest (6) links to each other through upper connecting rod (8) with the upper portion of back of body support (1), be provided with spring piece (2) between rotatory pull rod (3) and runing rest (6), the one end of spring piece (2) buckle and laminate mutually with rotatory pull rod (3), the other end of spring piece (2) sets up behind spring (4) with runing rest (6) looks.
2. 2. Chair back structure capable of rotating along with sitting posture according to claim 1, characterized in that the rotating bracket (6) and the back bracket (1) are locked and connected by a round head self-tapping screw (5).
3. 3. Chair back structure capable of rotating along with sitting posture according to claim 1, characterized in that the two sides of the back frame (11) and the rotating bracket (6) are locked and connected through step screws (9).

Description

Chair back structure capable of rotating along with sitting posture Technical Field The utility model relates to a chair back structure, in particular to a chair back structure capable of rotating along with sitting postures. Background The chair is used as a common seat in life, work and study, and has the basic functions of comfort, convenience and safety. However, the waist position of the office chair back frame in the current market does not have a front-back adjusting function, people with different body types are different in waist position and different in position to be supported, and therefore, users cannot well support the waist when rotating, and comfort and customer experience are affected. Therefore, it is necessary to provide a chair back structure that can rotate in response to a sitting posture. Disclosure of utility model The utility model aims to solve the technical problem of providing a chair back structure capable of rotating along with a sitting posture, and solves the problem that the existing chair back structure cannot rotate along with the sitting posture. The technical scheme adopted by the utility model for solving the technical problems is to provide a chair back structure capable of rotating along with sitting postures, which comprises a back support, a rotary support and a back frame, wherein the back frame is arranged on the rotary support, the rotary support is positioned in a clamping groove of the back support, a rotary pull rod is arranged on the back support, the lower parts of the rotary pull rod and the back frame are connected with the lower part of the rotary support through a lower connecting rod, the middle connecting position of the rotary support is connected with the upper part of the back support through an upper connecting rod, a spring piece is arranged between the rotary pull rod and the rotary support, one end of the spring piece is bent and is attached to the rotary pull rod, and the other end of the spring piece is provided with a spring pressing piece and is abutted to the rotary support. The chair back structure capable of rotating along with sitting postures is characterized in that the rotating support and the back support are locked and connected through the round head tapping screw. The chair back structure capable of rotating along with sitting postures is characterized in that the two sides of the back frame and the two sides of the rotating support are locked and connected through the step screws. Compared with the prior art, the chair back structure has the advantages that the angle of the chair back is changed by changing the gravity, the rotating chair back structure can better support the back, the chair back structure can conveniently rotate along with sitting postures, and the chair back structure is simple in integral structure, reliable in function and convenient to assemble. Drawings Fig. 1 is a schematic view of a chair back capable of rotating along with sitting posture in an embodiment of the utility model. Marked in the figure as: 1. A back support; 2, a spring piece, 3, a rotary pull rod, 4, a spring pressing piece, 5, a round head self-tapping screw, 6, a rotary support, 7, a lower connecting rod, 8, an upper connecting rod, 9, a step screw, 10, M5 multiplied by 12 screws, 11 and a back frame. Detailed Description The utility model is further described below with reference to the drawings and examples. Fig. 1 is a schematic view of a chair back capable of rotating along with sitting posture in an embodiment of the utility model. Referring to fig. 1, the chair back structure capable of rotating along with sitting postures in the embodiment of the utility model comprises a back support 1, a rotary support 6 and a back frame 11, wherein the back frame 11 is arranged on the rotary support 6, the rotary support 6 is positioned in a clamping groove of the back support 1, a rotary pull rod 3 is arranged on the back support 1, the lower parts of the rotary pull rod 3 and the back frame 11 are connected with the lower part of the rotary support 6 through a lower connecting rod 7, the middle linking position of the rotary support 6 is connected with the upper part of the back support 1 through an upper connecting rod 8, a spring piece 2 is arranged between the rotary pull rod 3 and the rotary support 6, one end of the spring piece 2 is bent and is attached to the rotary pull rod 3, and the other end of the spring piece 2 is abutted against the rotary support 6 after a spring pressing piece 3 is arranged. In the chair back structure in the embodiment of the utility model, the rotary support 6 is in locking connection with the back support 1 through the round head tapping screw 4, and the two sides of the back frame 11 and the rotary support 6 are in locking connection through the step screw 9. The chair back structure of the embodiment of the utility model has simple integral structure and reliable function, can conveniently rotate along wit