Chair back bending radian adjusting structure

Abstract

The utility model discloses a chair back bending radian adjusting structure and relates to the field of furniture. The chair back bending radian adjusting structure comprises a memory metal supporting piece arranged in a chair back and a fixing piece arranged at the bottom of the chair back, an adjusting piece is arranged on the inner side of the fixing piece, a traction component is installed between the top end of the memory metal supporting piece and the adjusting piece, the traction component comprises a steel cable, and the adjusting piece comprises a steel wire rope and a steel wire rope. A fixing frame and an adjusting lead screw. According to the chair back bending radian adjusting structure, the sliding connecting strip slides forwards on the outer surface of the adjusting lead screw by rotating the handle, so that the steel cables are pulled to move, the top ends of the steel cables pull the connecting shaft at the top downwards, the memory metal strip is bent, and the bending radian of the whole chair back is adjusted.

Description

Technical Field

[0001] The utility model relates to the technical field of furniture, in particular to a chair back bending curvature adjustment structure. Background Art

[0002] Nowadays, with the development of the furniture industry, various types of chairs have come into people's view, and now many chair backs have the function of angle adjustment. The backrest is installed on the chair body through a rotating connector, and then fixed by a fixing part after the angle is rotated during use.

[0003] However, the bending angle of the chair back is mostly fixed and cannot be adjusted according to the user's demand for lumbar support. Therefore, a chair back bending arc adjustment structure is provided to solve the above problem. Utility Model Content

[0004] In view of the deficiencies in the prior art, the utility model provides a chair back bending curvature adjustment structure, which solves the problem that the bending angles of current chair backs are mostly fixed and cannot be adjusted according to the user's demand for lumbar support.

[0005] To achieve the above objectives, the utility model is implemented through the following technical solutions: a chair back bending curvature adjustment structure, comprising a memory metal support member arranged inside the chair back and a fixing member arranged at the bottom of the chair back, an adjusting member is arranged inside the fixing member, a traction member is installed between the top end of the memory metal support member and the adjusting member, and the traction member includes;

[0006] Steel cables, which are used to pull the memory metal support to bend;

[0007] A stop shaft, which is fixedly arranged on the fixing member, and is used to change the pulling direction of the steel cable;

[0008] A sliding connection bar, which is fixedly arranged at the bottom end of the steel cable, and is used to synchronously pull the multiple steel cables to move;

[0009] The adjusting member comprises:

[0010] A fixed frame, which is arranged in the middle of the fixed member;

[0011] An adjusting screw rod is rotatably arranged at the bottom of the fixed frame;

[0012] The sliding connection strip is threadedly connected to the outer surface of the adjusting screw rod.

[0013] Preferably, the memory metal support comprises a plurality of memory metal bars and connecting shafts fixedly arranged at both ends of the plurality of memory metal bars, the connecting shafts are fixedly connected to the fixing member at the bottom, and the thickness of the memory metal bars gradually decreases from top to bottom.

[0014] Preferably, the outer surface of the connecting shaft at the top is rotatably connected to a connecting head, and the top end of the steel cable is fixedly connected to the outer surface of the connecting head.

[0015] Preferably, the outer surface bearing of the retaining shaft is connected to a fixed pulley, and the steel cable passes around the outer surface of the fixed pulley.

[0016] Preferably, the bottom of the fixing member is fixedly connected to a positioning frame, the bottom end of the steel cable passes through the positioning frame, and the outer surface of the upper end of the steel cable is provided with a soft rubber sleeve.

[0017] Preferably, both sides of the fixed frame are fixedly connected with slide rails, and the sliding connection strips are slidably connected to the outer surfaces of the slide rails.

[0018] Preferably, shaft seats are fixedly mounted on both front and rear ends of the fixed frame, the adjusting screw rod is rotatably connected to the inside of the shaft seat, and a handle is fixedly mounted on the end of the adjusting screw rod.

[0019] The utility model discloses a chair back bending curvature adjustment structure, which has the following beneficial effects: a plurality of memory metal strips are arranged inside the back of the chair back, the thickness of the memory metal strips is wide at the top and narrow at the bottom, and when in use, the handle is rotated to make the sliding connection strip slide forward on the outer surface of the adjustment screw rod, thereby pulling a plurality of steel cables to move, and the top end of the steel cable pulls the top connection shaft downward, so that the memory metal strip is bent, thereby adjusting the bending curvature of the entire chair back. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0021] Figure 1 This is a schematic diagram of the overall back structure of the utility model;

[0022] Figure 2 This is a schematic diagram of the overall front structure of the utility model;

[0023] Figure 3 This is a schematic diagram of the structure of the memory metal support member of the utility model;

[0024] Figure 4 This is a schematic diagram of the structure of the adjusting member of the utility model.

[0025] In the figure: 1. fixing part; 2. memory metal support part; 21. memory metal strip; 22. connecting shaft; 3. traction part; 31. connector; 32. steel cable; 33. soft rubber sleeve; 34. sliding connecting strip; 35. stop shaft; 36. fixed pulley; 4. adjusting part; 41. positioning frame; 42. fixing frame; 43. adjusting screw rod; 44. shaft seat; 45. slide rail; 46. handle. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical solution and advantages of the embodiments of the utility model clearer, the technical solution in the embodiments of the utility model is described clearly and completely. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0027] The embodiment of the present application provides a chair back bending radius adjustment structure, which solves the problem that the bending angles of current chair backs are mostly fixed and cannot be adjusted according to the user's demand for lumbar support.

[0028] In order to better understand the above technical solution, the above technical solution will be described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0029] The utility model embodiment discloses a chair back bending curvature adjustment structure.

[0030] According to the attached Figure 1-4 As shown, it includes a memory metal support 2 arranged inside the seat back and a fixing member 1 arranged at the bottom of the seat back, an adjusting member 4 is arranged inside the fixing member 1, and a traction member 3 is installed between the top end of the memory metal support 2 and the adjusting member 4, and the traction member 3 includes;

[0031] The steel cable 32 is used to pull the memory metal support 2 to bend;

[0032] A stop shaft 35, which is fixedly disposed on the fixing member 1, and the stop shaft 35 is used to change the pulling direction of the steel cable 32;

[0033] A sliding connection bar 34 is fixedly disposed at the bottom end of the steel cable 32, and the sliding connection bar 34 is used to synchronously pull the multiple steel cables 32 to move;

[0034] The adjusting member 4 comprises:

[0035] A fixing frame 42, which is arranged in the middle of the fixing member 1;

[0036] An adjusting screw rod 43 rotatably disposed at the bottom of the fixed frame 42 ;

[0037] The sliding connection strip 34 is threadedly connected to the outer surface of the adjusting screw rod 43 .

[0038] The memory metal support 2 includes a plurality of memory metal strips 21 and connecting shafts 22 fixedly arranged at both ends of the plurality of memory metal strips 21. The bottom connecting shaft 22 is fixedly connected to the fixing member 1. The thickness of the memory metal strip 21 gradually decreases from top to bottom. When the memory metal strip 21 bends and deforms, the bending amplitude of the bottom is larger, which is conducive to the bottom protrusion to counteract the user's lumbar spine, making it more comfortable.

[0039] The outer surface of the top connecting shaft 22 is rotatably connected with a connecting head 31 , and the top of the steel cable 32 is fixedly connected to the outer surface of the connecting head 31 . The top of the steel cable 32 pulls the top connecting shaft 22 downward, and the connecting head 31 rotates on the outer surface of the connecting shaft 22 .

[0040] The outer surface bearing of the blocking shaft 35 is connected to a fixed pulley 36, and the steel cable 32 is passed around the outer surface of the fixed pulley 36, thereby reducing the friction resistance of the steel cable 32 and extending the service life.

[0041] A positioning frame 41 is fixedly connected to the bottom of the fixing member 1, and the bottom end of the steel cable 32 passes through the positioning frame 41. A soft rubber sleeve 33 is provided on the outer surface of the upper end of the steel cable 32. The positioning frame 41 prevents the steel cable 32 from lateral deflection, and the soft rubber sleeve 33 can protect when a group of steel cables 32 breaks, preventing them from bursting out and injuring people.

[0042] Both sides of the fixed frame 42 are fixedly connected with slide rails 45 , and the sliding connection bar 34 is slidably connected to the outer surface of the slide rails 45 to prevent the sliding connection bar 34 from being deflected.

[0043] Axle seats 44 are fixedly installed at both the front and rear ends of the fixed frame 42, and the adjusting screw rod 43 is rotatably connected to the inside of the axle seat 44. A handle 46 is fixedly installed at the end of the adjusting screw rod 43. By rotating the handle 46, the sliding connecting strip 34 slides forward on the outer surface of the adjusting screw rod 43, thereby pulling multiple steel cables 32 to move. The top end of the steel cable 32 pulls the top connecting shaft 22 downward, causing the memory metal strip 21 to bend, thereby adjusting the curvature of the entire chair back.

[0044] The above shows and describes the basic principle and main features of the utility model and the advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. A chair back bending curvature adjustment structure, comprising a memory metal support (2) arranged inside the chair back and a fixing member (1) arranged at the bottom of the chair back, characterized in that: An adjusting member (4) is arranged inside the fixing member (1), and a traction member (3) is installed between the top end of the memory metal support member (2) and the adjusting member (4), wherein the traction member (3) comprises: A steel cable (32) for pulling the memory metal support (2) to bend; A stop shaft (35) fixedly disposed on the fixing member (1), the stop shaft (35) being used to change the pulling direction of the steel cable (32); A sliding connection bar (34) is fixedly arranged at the bottom end of the steel cable (32), and the sliding connection bar (34) is used to synchronously pull the multiple steel cables (32) to move; The adjusting member (4) comprises: A fixing frame (42) disposed in the middle of the fixing member (1); An adjusting screw rod (43) is rotatably arranged at the bottom of the fixed frame (42); The sliding connection strip (34) is threadedly connected to the outer surface of the adjusting screw rod (43).

2. The chair back bending curvature adjustment structure according to claim 1, characterized in that: The memory metal support (2) comprises a plurality of memory metal strips (21) and connecting shafts (22) fixedly arranged at both ends of the plurality of memory metal strips (21), the connecting shafts (22) being fixedly connected to the fixing member (1) at the bottom, and the thickness of the memory metal strips (21) gradually decreases from top to bottom.

3. The chair back bending curvature adjustment structure according to claim 2, characterized in that: The outer surface of the connecting shaft (22) at the top is rotatably connected to a connecting head (31), and the top end of the steel cable (32) is fixedly connected to the outer surface of the connecting head (31).

4. The chair back bending curvature adjustment structure according to claim 2, characterized in that: The outer surface bearing of the blocking shaft (35) is connected to a fixed pulley (36), and the steel cable (32) passes around the outer surface of the fixed pulley (36).

5. The chair back bending curvature adjustment structure according to claim 1, characterized in that: The bottom of the fixing member (1) is fixedly connected to a positioning frame (41), the bottom end of the steel cable (32) passes through the positioning frame (41), and the outer surface of the upper end of the steel cable (32) is provided with a soft rubber sleeve (33).

6. The chair back bending curvature adjustment structure according to claim 1, characterized in that: Both sides of the fixed frame (42) are fixedly connected with slide rails (45), and the sliding connection strip (34) is slidably connected to the outer surface of the slide rails (45).

7. The chair back bending curvature adjustment structure according to claim 6, characterized in that: Axle seats (44) are fixedly mounted on both front and rear ends of the fixed frame (42); the adjusting screw rod (43) is rotatably connected to the inside of the shaft seat (44); and a handle (46) is fixedly mounted on the end of the adjusting screw rod (43).

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