Gear adjusting structure of seat waist rest and seat

Abstract

The utility model relates to a gear adjusting structure of seat waist rest and seat, including backrest and waist rest, and the waist rest includes fixed part and adjusting part, and is equipped with gear adjusting unit between backrest and waist rest adjusting part, gear adjusting unit includes: adjusting unit seat is equipped with adjusting unit chamber, and the bottom of adjusting unit chamber is equipped with at least one elastic element fixed part, and is fixed with elastic element, and is equipped with rotating part assembly part, adjusting shaft support hole, adjusting unit seat is rotatably connected with the waist rest, rotating part is set up in adjusting unit chamber through rotating part assembly part and is limited through limiting piece, and is equipped with the adjusting shaft hole of deviating from the center of gravity, adjusting shaft passes through adjusting shaft support hole and inserts in adjusting shaft hole, can drive rotating part to rotate at least one gear, and then drive adjusting unit seat to overturn relative to the waist rest, the fixed part of waist rest is fixed with backrest, through the optimization of structure, simplify waist rest adjusting structure, realize the needed adjustment of several gears, and the waist rest is convenient for adjustment and reset.

Description

Technical Field

[0001] This utility model relates to a lumbar support adjustment structure and a seat, belonging to the field of seat adjustment components and seat technology. Background Technology

[0002] As furniture closely related to human life, chairs bring convenience to people's work and meet the daily needs of desk work. In addition, the backrest is a key component for improving posture and enhancing comfort in daily use of office chairs. While ergonomically designed backrests meet basic needs, current technology offers limited adjustability. For example, people of different heights and with different sitting postures require significantly different backrest support points from an ergonomic perspective. Therefore, to achieve greater adjustability and adaptability, a separate lumbar support component is needed, or a separate lumbar support component should be purchased from the market. Current lumbar support components lack adjustable positions or have complex adjustment functions, resulting in extremely high costs and hindering industrial production.

[0003] This utility model aims to solve this technical problem by equipping the backrest of the seat with a lumbar support. Through structural optimization, the lumbar support adjustment structure is simplified, allowing for several adjustment levels while ensuring the stability of the backrest's center of gravity. This expands the seat's usage scenarios, improves its convenience, comfort, stability, and safety, and makes the lumbar support easy to adjust and reset. Utility Model Content

[0004] One of the purposes of this utility model is to solve the shortcomings of existing lumbar support components that do not have a gear adjustment function or have a complex adjustment function, resulting in extremely high costs and hindering industrial production. This utility model provides a lumbar support adjustment structure that can be easily implemented. Through structural optimization, the lumbar support adjustment structure is simplified, and several gears can be adjusted as needed. The lumbar support is also easy to adjust and reset.

[0005] The second objective of this utility model is to provide a seat equipped with the lumbar support adjustment structure of this utility model. Based on the lumbar support gear adjustment structure, the adjustment structure is simplified, the lumbar support gear can be adjusted as needed, and the center of gravity of the seat is kept stable, thus expanding the use scenarios of the seat and improving the convenience, comfort, stability and safety of use.

[0006] The technical solution adopted by this utility model to solve its technical problem is:

[0007] A lumbar support adjustment structure includes a backrest and a lumbar support. The lumbar support includes a fixed part and an adjustment part. An adjustment unit is provided between the backrest and the lumbar support adjustment part. The adjustment unit includes: an adjustment unit seat with an adjustment unit cavity. The bottom of the adjustment unit cavity has at least one elastic element fixing part and an elastic element fixed thereon, as well as a rotating part assembly and an adjustment shaft support hole. The adjustment unit seat is rotatably connected to the lumbar support. A rotating part is laterally disposed in the adjustment unit cavity through the rotating part assembly and limited by a limiting part, and has an adjustment shaft hole offset from the axis. An adjustment shaft passes through the adjustment shaft support hole and is inserted into the adjustment shaft hole, capable of driving the rotating part to rotate at least one gear, thereby driving the adjustment unit seat to flip relative to the lumbar support. The fixed part of the lumbar support is fixed to the backrest. When the adjustment unit seat rotates relative to the lumbar support, the lumbar support is pushed outward by the backrest, thereby realizing the gear adjustment of the lumbar support flipping outward.

[0008] It also includes a gear locking structure, which locks and unlocks the lumbar support rotation angle by locking and unlocking the rotating parts.

[0009] Preferably, the lumbar support is provided with a gear adjustment unit assembly cavity that is adapted to the size of the adjustment unit seat, and a rotatable connecting shaft hole is provided between the adjustment unit seat and the gear adjustment unit assembly cavity, and a rotatable connection is achieved through a rotatable pin.

[0010] Preferably, the gear adjustment unit further includes an adjustment unit base plate, through which the rotating component is encapsulated in the adjustment unit base.

[0011] Preferably, the bottom of the adjustment unit cavity is provided with elastic element fixing grooves on both sides. The elastic element is a bow-shaped spring sheet, including a fixing part and an elastic functional part. The fixing part is fixed to the elastic element fixing groove, and the elastic functional part abuts against the rotating part.

[0012] Preferably, the limiting member is an elastic locking post, including a locking part and an elastic part, and flexible limiting is achieved by the locking part abutting against the adjustment unit cavity and the elastic part abutting against the rotating member.

[0013] Preferably, the adjusting shaft is provided with a handle that can drive the rotating component to rotate at least two positions, namely a 90° rotation position and a 180° rotation position, which correspond to the lumbar support rotating by 10° and 20° respectively.

[0014] Preferably, the base plate of the adjustment unit is provided with an elastic element fixing groove, and an elastic element is provided, which is an arch-shaped spring piece, including a fixing part and an elastic functional part. The fixing part is fixed to the elastic element fixing groove, and the elastic functional part abuts against the rotating part.

[0015] Preferably, the rotating component is dumbbell-shaped, with drive wheels on both sides and a drive connecting seat in the middle. The rotating component assembly part is a rotating component assembly groove symmetrically arranged on both sides of the adjustment unit cavity. The drive wheels are provided with rotating flanges on both sides. The rotating flanges are rotatably engaged with the rotating component assembly grooves to achieve rotation and axial positioning.

[0016] Preferably, the gear locking structure is formed by the cooperation of an adjustment unit seat, an adjustment unit seat base plate, and an elastic element. In the initial gear position, the adjustment unit seat, the adjustment unit seat base plate, and the elastic element can restrict the rotating part to prevent the waist from rotating forward. When the rotating part is rotated to the first gear position, the rotating part can be fixed by the elastic element to prevent the waist from rotating forward or backward. When the rotating part is rotated to the second gear position, the adjustment unit seat and the adjustment unit seat base plate can restrict the rotating part to prevent the waist from moving backward.

[0017] A type of seat that employs the aforementioned lumbar support adjustment mechanism.

[0018] The beneficial effects of this utility model are: through structural optimization, the lumbar support adjustment structure is simplified, enabling on-demand adjustment of several levels, and the lumbar support is easy to adjust and reset. Based on the lumbar support level adjustment structure, this seat simplifies the adjustment structure, enabling on-demand adjustment of the lumbar support levels while ensuring the stability of the seat's center of gravity, expanding the seat's application scenarios, and improving its convenience, comfort, stability, and safety. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a structural schematic diagram of Embodiment 1 of the present invention.

[0021] Figure 2 An exploded view of this utility model;

[0022] Figure 3 Another exploded view of this utility model;

[0023] Figure 4 This utility model is illustrated in its usage state (initial gear position).

[0024] Figure 5 This utility model is illustrated in its usage state (lumbar support rotated 10°).

[0025] Figure 6 This utility model is illustrated in its usage state (lumbar support rotated 20°).

[0026] In the diagram: 1. Backrest, 2. Fixing screw, 3. Adjustment unit base plate, 4. Elastic element, 5. Adjustment shaft, 6. Handle, 7. Rotating component, 8. Waist support, 9. Elastic locking pin, 10. Fixing nut, 11. Elastic element, 12. Rotating pin, 13. Adjustment unit base, 13a. Elastic element fixing groove. Detailed Implementation

[0027] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the scope of protection of the present invention.

[0028] Example 1:

[0029] like Figure 1-6 As shown, a lumbar support adjustment structure for a seat includes a backrest 1 and a lumbar support 8. The lumbar support 8 includes a fixed part and an adjustment part. A gear adjustment unit is provided between the backrest 1 and the adjustment part of the lumbar support 8. The gear adjustment unit includes: an adjustment unit seat 13 with an adjustment unit cavity. The bottom of the adjustment unit cavity has at least one elastic element fixing part and an elastic element 11 fixed thereon, as well as a rotating part assembly part and an adjustment shaft support hole. The adjustment unit seat 13 is rotatably connected to the lumbar support 8. A rotating part 7 is horizontally arranged in the adjustment unit cavity through the rotating part assembly part and limited by a limiting part. It has an adjustment shaft hole that is off-center. An adjustment shaft 5 passes through the adjustment shaft support hole and is inserted into the adjustment shaft hole. It can drive the rotating part 7 to rotate at least one gear, thereby driving the adjustment unit seat 13 to flip relative to the lumbar support 8. The fixed part of the lumbar support 8 is fixed to the backrest 1. When the adjustment unit seat 13 rotates relative to the lumbar support 8, the lumbar support 8 is pushed outward by the backrest 1 to achieve gear adjustment of the lumbar support 8 flipping outward.

[0030] It also includes a gear locking structure, which locks and unlocks the lumbar support 8 by locking and unlocking the rotating part 7.

[0031] Specifically, the lumbar support 8 is provided with a gear adjustment unit assembly cavity that is adapted to the size of the adjustment unit seat 13. A rotatable connecting shaft hole is provided between the adjustment unit seat 13 and the gear adjustment unit assembly cavity, and a rotatable connection is achieved through a rotating pin 12.

[0032] Specifically, the gear adjustment unit also includes an adjustment unit base plate 3, through which the rotating part 7 is encapsulated in the adjustment unit base 13.

[0033] Specifically, the bottom of the adjustment unit cavity is symmetrically provided with elastic element fixing grooves 13a on both sides. The elastic element 11 is a bow-shaped spring sheet, including a fixing part and an elastic functional part. It is fixed to the elastic element fixing groove 13a by the fixing part, and the elastic functional part abuts against the rotating part 7.

[0034] Specifically, the limiting member is an elastic locking post 9, which includes a locking part and an elastic part. The locking part abuts against the adjustment unit cavity, and the elastic part abuts against the rotating member 7 to achieve flexible limiting.

[0035] Specifically, the adjustment shaft 5 is provided with a handle 6, which can drive the rotating part 3 to rotate at least two positions, namely the handle 6 rotating 90° and rotating 180°, which correspond to the waist support 8 rotating 10° and 20° respectively.

[0036] Specifically, the base plate of the adjustment unit seat 13 is provided with an elastic element fixing groove and an elastic element 4, which is an arch-shaped spring piece, including a fixing part and an elastic functional part. The fixing part is fixed to the elastic element fixing groove, and the elastic functional part abuts against the rotating part 7.

[0037] Specifically, the rotating component 7 is dumbbell-shaped, with drive wheels on both sides and a drive connecting seat in the middle. The rotating component assembly part is a rotating component assembly slot symmetrically arranged on both sides of the adjustment unit cavity. The drive wheels are provided with rotating flanges on both sides. The rotating flanges are rotatably engaged with the rotating component assembly slots to achieve rotation and axial positioning.

[0038] Specifically, the gear locking structure is formed by the cooperation of the adjustment unit seat 13, the adjustment unit seat base plate 3, and the elastic element 11. In the initial gear position, the adjustment unit seat 13, the adjustment unit seat base plate 3, and the elastic element 11 can restrict the rotating part 7 to prevent the lumbar support 8 from rotating forward. When the rotating part 7 is rotated to the first gear position, the rotating part 7 can be fixed by the elastic element 11 and the elastic element 4 to prevent the lumbar support 8 from rotating forward or backward. When the rotating part 7 is rotated to the second gear position, the adjustment unit seat 13 and the adjustment unit seat base plate 3 can restrict the rotating part 7 to prevent the lumbar support 8 from moving backward.

[0039] A type of seat that employs the aforementioned lumbar support adjustment mechanism.

[0040] The beneficial effects of this utility model are: through structural optimization, the lumbar support adjustment structure is simplified, enabling on-demand adjustment of several levels, and the lumbar support is easy to adjust and reset. Based on the lumbar support level adjustment structure, this seat simplifies the adjustment structure, enabling on-demand adjustment of the lumbar support levels while ensuring the stability of the seat's center of gravity, expanding the seat's application scenarios, and improving its convenience, comfort, stability, and safety.

[0041] The embodiments described above are merely preferred solutions of this utility model and are not intended to limit this utility model in any way. Other variations and modifications are possible without departing from the technical solutions described in the claims.

Claims

1. A lumbar support adjustment structure for a seat, comprising a backrest (1) and a lumbar support (8), the lumbar support (8) comprising a fixing part and an adjusting part, characterized in that: A gear adjustment unit is provided between the backrest (1) and the lumbar support (8) adjustment parts; the gear adjustment unit includes: an adjustment unit seat (13) with an adjustment unit cavity, at least one elastic element fixing part at the bottom of the adjustment unit cavity and an elastic element (11) fixed thereon, and a rotating part assembly part and an adjustment shaft support hole, the adjustment unit seat (13) and the lumbar support (8) being rotatably connected; a rotating part (7) is provided in the adjustment unit cavity through the rotating part assembly part and is limited by a limiting part, and has an adjustment shaft hole that deviates from the axis; an adjustment shaft (5) passes through the adjustment shaft support hole and is inserted into the adjustment shaft hole, and can drive the rotating part (7) to rotate at least one gear, thereby driving the adjustment unit seat (13) to flip relative to the lumbar support (8); the fixing part of the lumbar support (8) is fixed to the backrest (1), and when the adjustment unit seat (13) rotates relative to the lumbar support (8), the lumbar support (8) is pushed outward by the backrest (1) to realize the gear adjustment of the lumbar support (8) flipping outward; It also includes a gear locking structure, which locks and unlocks the lumbar support (8) rotation angle by locking and unlocking the rotating part (7).

2. The lumbar support adjustment structure according to claim 1, characterized in that: The lumbar support (8) is provided with a gear adjustment unit assembly cavity that is adapted to the size of the adjustment unit seat (13). A rotating connection shaft hole is provided between the adjustment unit seat (13) and the gear adjustment unit assembly cavity, and a rotating connection is achieved through a rotating pin (12).

3. The lumbar support adjustment structure according to claim 2, characterized in that: The gear adjustment unit also includes an adjustment unit base plate (3), through which the rotating part (7) is encapsulated in the adjustment unit base (13).

4. The lumbar support adjustment structure according to claim 1, 2, or 3, characterized in that: The bottom of the adjustment unit cavity is symmetrically provided with elastic element fixing grooves (13a) on both sides. The elastic element (11) is a bow-shaped spring piece, including a fixing part and an elastic functional part. It is fixed to the elastic element fixing groove (13a) by the fixing part, and the elastic functional part abuts against the rotating part (7).

5. The seat lumbar support adjustment structure according to claim 1, 2, or 3, characterized in that: The limiting component is an elastic locking post (9), which includes a locking part and an elastic part. The locking part abuts against the adjustment unit cavity, and the elastic part abuts against the rotating component (7) to achieve flexible limiting.

6. The seat lumbar support adjustment structure according to claim 1, 2, or 3, characterized in that: The adjustment shaft (5) is provided with a handle (6), which can drive the rotating part (3) to rotate at least two positions, namely the handle (6) to rotate 90° and 180°, which correspond to the lumbar support (8) rotating 10° and 20° respectively.

7. The seat lumbar support adjustment structure according to claim 3, characterized in that: The base plate of the adjustment unit seat (13) is provided with an elastic element fixing groove and an elastic element (4) in the shape of an arc, including a fixing part and an elastic functional part. The fixing part is fixed to the elastic element fixing groove, and the elastic functional part abuts against the rotating part (7).

8. The seat lumbar support adjustment structure according to claim 1, 2, or 3, characterized in that: The rotating component (7) is dumbbell-shaped, with drive wheels on both sides and a drive connecting seat in the middle. The rotating component assembly part is a rotating component assembly slot symmetrically arranged on both sides of the adjustment unit cavity. The drive wheels are provided with rotating flanges on both sides. The rotating flanges are rotated and engaged with the rotating component assembly slots to achieve rotation and axial positioning.

9. The seat lumbar support adjustment structure according to claim 7, characterized in that: The gear locking structure is formed by the cooperation of the adjustment unit seat (13), the adjustment unit seat base plate (3) and the elastic element (11). In the initial gear position, the adjustment unit seat (13), the adjustment unit seat base plate (3) and the elastic element (11) can restrict the rotating part (7) to prevent the lumbar support (8) from rotating forward. When the rotating part (7) is rotated to the first gear position, the rotating part (7) can be fixed by the elastic element (11) and the elastic element (4) to prevent the lumbar support (8) from rotating forward or backward. When the rotating part (7) is rotated to the second gear position, the adjustment unit seat (13) and the adjustment unit seat base plate (3) can restrict the rotating part (7) to prevent the lumbar support (8) from moving backward.

10. A type of seat, characterized in that: The seat lumbar support adjustment structure described in any one of claims 1-9 is adopted.

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