A backrest elastic force size adjusting mechanism

Abstract

The utility model discloses a kind of chair back elastic force size adjusting mechanism, it includes chair back support, the surface of this chair back support two sides symmetry is equipped with support through slot, two the support through slot are connected with adjusting support, the lower end of this adjusting support is adjustably connected with adjusting component, the upper end of this adjusting support is connected with torsion spring pressure piece, the two sides of this chair back support symmetry is equipped with installation through-hole, two the installation through-hole are connected with torsion spring connecting rod, the outside of this torsion spring connecting rod is sleeved with torsion spring connector, the outside of this torsion spring connector is connected with pressure torsion spring, one end of this pressure torsion spring is equipped with torsion spring hook part, and this torsion spring hook part is connected in the lower part of this torsion spring pressure piece. By rotating adjusting component, adjusting support and torsion spring pressure piece are driven to move up and down, to change the degree of oppression of torsion spring hook part to pressure torsion spring, so that pressure torsion spring produces different compression amount, and then the flexible adjustment of chair back elastic force size is realized, the comfort and applicability of seat are improved.

Description

Technical Field

[0001] This utility model belongs to the technical field of seat components, specifically relating to a mechanism for adjusting the elasticity of a chair back. Background Technology

[0002] With the widespread use of modern office, study, and leisure chairs, people's demands for chair comfort and ergonomic performance are increasing. The elasticity of the chair back directly affects the user's support and comfort during use. Reasonable elasticity can not only improve the sitting experience but also effectively relieve the pressure on the lower back caused by prolonged sitting.

[0003] However, existing chair back elasticity adjustment mechanisms generally have the following shortcomings: the adjustment structure is complex and inconvenient to operate, making it difficult for users to flexibly adjust the chair back rebound force according to their own body shape and usage habits in daily use; some mechanisms have insufficient elasticity adjustment precision, and loosening or backing is prone to occur during the adjustment process, making it difficult to ensure the stability of the chair back in different positions.

[0004] Therefore, overcoming the shortcomings of the existing technology is an urgent problem to be solved in this technical field. Utility Model Content

[0005] In view of the technical problems mentioned in the background art, the purpose of this utility model is to provide a chair back elasticity adjustment mechanism to solve the technical problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a chair back elasticity adjustment mechanism, comprising a chair back support, wherein support slots are symmetrically formed on both sides of the surface of the chair back support, and an adjustment support is connected to the two support slots. An adjustment component is tunably connected to the lower end of the adjustment support, and a torsion spring pressure member is connected to the upper end of the adjustment support. Mounting holes are symmetrically formed on both sides of the chair back support, and torsion spring connecting rods are connected to the two mounting holes. A torsion spring connecting sleeve is sleeved on the outer side of the torsion spring connecting rod, and a pressure torsion spring is connected to the outer side of the torsion spring connecting sleeve. One end of the pressure torsion spring is provided with a torsion spring hook, and the torsion spring hook is connected to the lower part of the torsion spring pressure member.

[0007] Furthermore, the lower end of the adjusting bracket is provided with a threaded adjusting screw hole, and the middle part of the adjusting component is provided with a threaded adjusting stud. The adjusting stud is threadedly connected to the adjusting screw hole, thereby allowing the adjusting component to be adjusted and connected to the lower end of the adjusting bracket.

[0008] Furthermore, the upper end of the adjusting bracket is symmetrically provided with pressure member connection holes on both sides, and the middle part of the torsion spring pressure member is provided with a pressure member connection groove. The two pressure member connection holes are symmetrically arranged on both sides of the pressure member connection groove, and are connected to the pressure member connection groove by fasteners passing through the pressure member connection holes, so that the torsion spring pressure member is stably installed on the upper end of the adjusting bracket.

[0009] Furthermore, one end of the torsion spring sleeve is provided with a first torsion spring connecting part, and the other end of the torsion spring sleeve is provided with a second torsion spring connecting part. The pressure torsion spring includes a first torsion spring component and a second torsion spring component. The first torsion spring component is connected to the outside of the first torsion spring connecting part, and the second torsion spring component is connected to the outside of the second torsion spring connecting part.

[0010] Furthermore, an arc-shaped ball recess is provided between the two bracket slots, and an arc-shaped ball groove is provided at the end of the adjusting stud. A movable ball is provided in the ball groove, and the movable ball is located between the ball recess and the ball groove.

[0011] Furthermore, the left and right ends of the torsion spring connecting rod are symmetrically fitted with connecting rod rubber sleeves, which are embedded in the mounting holes.

[0012] This utility model has the following advantages: Symmetrical support slots are provided on both sides of the surface of the chair back support. Adjustable supports are connected to the two support slots. Adjustable components are tunably connected to the lower end of each adjustable support, and a torsion spring pressure member is connected to the upper end of each adjustable support. Installation holes are symmetrically provided on both sides of the chair back support. Torsion spring connecting rods are connected to the two installation holes. Torsion spring sleeves are fitted onto the outer sides of the torsion spring connecting rods. Pressure torsion springs are connected to the outer sides of the torsion spring sleeves. One end of the pressure torsion spring has a torsion spring hook, which is connected to the lower part of the torsion spring pressure member. The chair back elasticity adjustment mechanism of this utility model allows the user to rotate the adjusting components, causing the adjusting supports and torsion spring pressure members to move up and down, thereby changing the pressure of the pressure torsion spring by the torsion spring hook, resulting in different compression amounts of the pressure torsion spring. This allows for flexible adjustment of the chair back elasticity. The mechanism has a reasonable structure and is easy to operate, enabling precise adjustment of the chair back elasticity according to the needs of different users, thus improving the comfort and usability of the seat. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall internal structure of this utility model.

[0014] Figure 2 This is a schematic diagram of the overall external structure of this utility model.

[0015] Figure 3 This is a schematic diagram of the overall exploded structure of this utility model.

[0016] Figure 4 This is a schematic diagram of the chair back support structure of this utility model.

[0017] Reference numerals: 10 for chair back support; 11 for support groove; 20 for adjustment support; 30 for adjustment component; 40 for torsion spring pressure component; 12 for mounting hole; 50 for torsion spring connecting rod; 51 for torsion spring connecting sleeve; 60 for pressure torsion spring; 61 for torsion spring hook; 21 for adjustment screw; 31 for adjustment stud; 22 for pressure component connecting hole; 41 for pressure component connecting groove; 511 for first torsion spring connecting part; 512 for second torsion spring connecting part; 62 for first torsion spring component; 63 for second torsion spring component; 13 for ball bearing recess; 311 for ball bearing groove; 70 for movable ball bearing; 52 for connecting rod rubber sleeve. Detailed Implementation

[0018] like Figures 1 to 4 As shown, a chair back elasticity adjustment mechanism includes a chair back support 10. Symmetrical support slots 11 are formed on both sides of the surface of the chair back support 10. Adjustable supports 20 are connected to the two support slots 11. Adjustable components 30 are tunably connected to the lower end of the adjustable supports 20, and torsion spring clamping components 40 are connected to the upper end of the adjustable supports 20. Mounting holes 12 are symmetrically formed on both sides of the chair back support 10. Torsion spring connecting rods 50 are connected to the two mounting holes 12, and torsion spring sleeves 5 are fitted onto the outer side of the torsion spring connecting rods 50. 1. A pressure torsion spring 60 is connected to the outer side of the torsion spring sleeve 51. One end of the pressure torsion spring 60 is provided with a torsion spring hook 61, which is connected to the lower part of the torsion spring pressure member 40. During use, the user can rotate the adjusting component 30 clockwise, causing the adjusting component 30 to move the adjusting bracket 20 downward. At the same time, the adjusting bracket 20 causes the torsion spring pressure member 40 to press down on the torsion spring hook 61, thereby tightening the pressure torsion spring 60 and adjusting the force of the pressure torsion spring 60. By changing the degree of compression of the pressure torsion spring 60, the rebound force of the chair back when the user leans back can be changed, allowing the chair back elasticity to be flexibly adjusted according to the needs of different users, improving the comfort and adaptability of the chair.

[0019] In practical implementation, the lower end of the adjusting bracket 20 is provided with a threaded adjusting screw port 21, and the middle part of the adjusting component 30 is provided with a threaded adjusting stud 31. The adjusting stud 31 is threadedly connected to the adjusting screw port 21, so that the adjusting component 30 can be adjustedly connected to the lower end of the adjusting bracket 20. In use, the user rotates the adjusting component 30, which drives the adjusting stud 31 to move up and down along the thread direction, thereby driving the adjusting bracket 20 to move down or up. When the adjusting bracket 20 moves down, it drives the torsion spring pressure member 40 at its upper end to move down synchronously, thereby pressing the torsion spring hook 61 connected to the lower part of the torsion spring pressure member 40, so that the pressure torsion spring 60 is gradually compressed and the elastic force increases. Conversely, when the user rotates the adjusting component 30 in the opposite direction, the adjusting bracket 20 moves up accordingly, the downward pressure of the torsion spring pressure member 40 on the torsion spring hook 61 decreases, the pressure torsion spring 60 is released, and the elastic force decreases.

[0020] In practical implementation, the upper end of the adjustment bracket 20 is symmetrically provided with pressure member connection holes 22 on both sides, and the middle part of the torsion spring pressure member 40 is provided with pressure member connection groove 41. The two pressure member connection holes 22 are symmetrically arranged on both sides of the pressure member connection groove 41, and are connected to the pressure member connection groove 41 by fasteners passing through the pressure member connection holes 22, so that the torsion spring pressure member 40 is stably installed on the upper end of the adjustment bracket 20.

[0021] In practical implementation, one end of the torsion spring sleeve 51 is provided with a first torsion spring connecting part 511, and the other end of the torsion spring sleeve 51 is provided with a second torsion spring connecting part 512. The pressure torsion spring 60 includes a first torsion spring component 62 and a second torsion spring component 63. The first torsion spring component 62 is connected to the outside of the first torsion spring connecting part 511, and the second torsion spring component 63 is connected to the outside of the second torsion spring connecting part 512. In use, when the user rotates the adjusting component 30 to drive the pressure spring 60... When the adjusting bracket 20 and the torsion spring pressure member 40 move downward, the torsion spring pressure member 40 presses the torsion spring hook 61, causing the first torsion spring component 62 and the second torsion spring component 63 to be compressed and gradually tightened, thereby increasing the rebound force of the chair back; when the user rotates the adjusting component 30 in the opposite direction, the adjusting bracket 20 drives the torsion spring pressure member 60 to move upward, the force on the torsion spring hook 61 decreases, the first torsion spring component 62 and the second torsion spring component 63 are gradually released, and the rebound force of the chair back decreases.

[0022] In practical implementation, an arc-shaped ball bearing recess 13 is recessed between the two bracket through slots 11, and an arc-shaped ball bearing groove 311 is recessed at the end of the adjusting stud 31. A movable ball 70 is provided in the ball bearing groove 311. The movable ball 70 is located between the ball bearing recess 13 and the ball bearing groove 311. In use, when the user rotates the adjusting component 30, the adjusting stud 31 drives the adjusting bracket 20 to move up and down under the action of the thread. The movable ball 70 cooperates with the ball bearing recess 13 and the ball bearing groove 311, which can not only play a limiting role, but also reduce the frictional resistance between the adjusting stud 31 and the adjusting bracket 20, making the adjustment process smoother. At the same time, the movable ball 70 can also form a stable positioning effect at different positions, preventing slippage or self-retraction during the adjustment process, thereby ensuring the adjustment accuracy and stability of the chair back elasticity.

[0023] In practical implementation, the left and right ends of the torsion spring connecting rod 50 are symmetrically fitted with connecting rod rubber sleeves 52. The connecting rod rubber sleeves 52 are embedded in the mounting through hole 12. During use, the connecting rod rubber sleeves 52 can buffer and limit the torsion spring connecting rod 50. On the one hand, it can reduce the direct friction between the torsion spring connecting rod 50 and the mounting through hole 12, avoid wear between metal parts, and improve the durability of the overall structure.

[0024] In summary, the backrest support 10 has symmetrical support slots 11 on both sides of its surface. Adjustable supports 20 are connected to the two support slots 11. Adjustable components 30 are tunably connected to the lower end of each adjustable support 20, and torsion spring pressure components 40 are connected to the upper end of each adjustable support 20. The backrest support 10 has symmetrical mounting holes 12 on both sides. Torsion spring connecting rods 50 are connected to the two mounting holes 12. Torsion spring sleeves 51 are fitted onto the outer side of each torsion spring connecting rod 50. Pressure torsion springs 60 are connected to the outer side of each torsion spring sleeve 51. One end of the component 0 is provided with a torsion spring hook 61, which is connected to the lower part of the torsion spring pressure member 40. The user of this utility model can rotate the adjustment component to drive the adjustment bracket and the torsion spring pressure member to move up and down, thereby changing the pressure of the torsion spring hook on the pressure torsion spring, so that the pressure torsion spring produces different compression amounts, thereby realizing flexible adjustment of the backrest elasticity. The mechanism has a reasonable structure and is easy to operate. It can accurately adjust the backrest elasticity according to the needs of different users, improving the comfort and applicability of the seat.

Claims

1. A chair back elasticity adjustment mechanism, characterized in that, It includes a chair back support (10), on which support slots (11) are symmetrically opened on both sides of the surface of the chair back support (10). An adjustment bracket (20) is connected to the two support slots (11). An adjustment component (30) is tunably connected to the lower end of the adjustment bracket (20). A torsion spring pressure member (40) is connected to the upper end of the adjustment bracket (20). Mounting holes (12) are symmetrically opened on both sides of the chair back support (10). A torsion spring connecting rod (50) is connected to the two mounting holes (12). A torsion spring connecting sleeve (51) is sleeved on the outside of the torsion spring connecting rod (50). A pressure torsion spring (60) is connected to the outside of the torsion spring connecting sleeve (51). A torsion spring hook (61) is provided at one end of the pressure torsion spring (60). The torsion spring hook (61) is connected to the lower part of the torsion spring pressure member (40).

2. The chair back elasticity adjustment mechanism according to claim 1, characterized in that, The lower end of the adjusting bracket (20) is provided with an adjusting screw hole (21) with threads, and the middle part of the adjusting component (30) is provided with an adjusting stud (31) with threads. The adjusting stud (31) is threadedly connected to the adjusting screw hole (21), so that the adjusting component (30) can be adjusted and connected to the lower end of the adjusting bracket (20).

3. The chair back elasticity adjustment mechanism according to claim 2, characterized in that, The upper end of the adjustment bracket (20) is symmetrically provided with pressure member connection holes (22) on both sides, and the middle part of the torsion spring pressure member (40) is provided with pressure member connection groove (41). The two pressure member connection holes (22) are symmetrically arranged on both sides of the pressure member connection groove (41), and are connected to the pressure member connection groove (41) by fasteners passing through the pressure member connection holes (22), so that the torsion spring pressure member (40) is stably installed on the upper end of the adjustment bracket (20).

4. The chair back elasticity adjustment mechanism according to claim 3, characterized in that, One end of the torsion spring sleeve (51) is provided with a first torsion spring connecting part (511), and the other end of the torsion spring sleeve (51) is provided with a second torsion spring connecting part (512). The pressure torsion spring (60) includes a first torsion spring component (62) and a second torsion spring component (63). The first torsion spring component (62) is connected to the outside of the first torsion spring connecting part (511), and the second torsion spring component (63) is connected to the outside of the second torsion spring connecting part (512).

5. The chair back elasticity adjustment mechanism according to claim 4, characterized in that, An arc-shaped ball recess (13) is recessed between the two bracket through slots (11), and an arc-shaped ball groove (311) is recessed at the end of the adjusting stud (31). A movable ball (70) is provided in the ball groove (311), and the movable ball (70) is located between the ball recess (13) and the ball groove (311).

6. The chair back elasticity adjustment mechanism according to claim 1, characterized in that, The left and right ends of the torsion spring connecting rod (50) are symmetrically fitted with connecting rod rubber sleeves (52), which are embedded in the mounting hole (12).

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