High-degree-of-freedom waist rest adjusting device

Abstract

The high-degree-of-freedom waist rest adjusting device comprises a back support, a waist rest and an adjusting piece, the adjusting piece comprises a horizontal part and a vertical part, the rear end of the waist rest is connected with a sliding piece extending in the horizontal direction, and the sliding piece is connected to the horizontal part in a front-back sliding mode in the horizontal direction; the vertical part is connected to the back bracket in a manner of sliding up and down along the vertical direction; a gear adjusting mechanism is arranged between the horizontal part and the sliding part and comprises a gear groove and an elastic part, the gear groove is formed in one of the horizontal part and the sliding part in the horizontal direction, and the elastic part is arranged on the other one of the horizontal part and the sliding part; a plurality of tooth grooves are formed in one side of the gear groove in a sunken mode, one end of the elastic piece is connected with a locking piece, and a clamping head used for being matched with the tooth grooves in a clamped mode is arranged on the locking piece. And a gear adjusting mechanism is also arranged between the vertical part and the back bracket. According to the high-degree-of-freedom waist rest adjusting device provided by the invention, the adjustment operation of the waist rest is relatively simple and convenient, and the high-degree-of-freedom waist rest adjusting device has a gear sense and is relatively good in stability.

Description

Technical Field

[0001] This utility model relates to the field of seating technology, specifically to a high-degree-of-freedom lumbar support adjustment device. Background Technology

[0002] Nowadays, people often sit for long periods while studying or working, putting excessive pressure on the lumbar spine from the upper limbs. This can easily lead to muscle strain in the lower back, causing the lumbar spine to curve forward and resulting in a range of lumbar spine diseases such as herniated discs. To protect lumbar health, existing chairs often include a lumbar support in the backrest. This support conforms to and supports the lower back, effectively relieving fatigue and preventing forward curvature of the lumbar spine. However, for users of different body types, the distance from their lower back to the seat surface and the distance from their lower back to the backrest vary. This means that if the lumbar support is not adjustable, it will not be suitable for users of all body types.

[0003] To address the aforementioned issues, an existing patent provides an adjustable lumbar support structure for an office chair (application number: CN202320952521.1). This structure features a movable, height-adjustable slide on a fixed base on the chair back. The slide's forward and backward movement grooves engage with the lumbar support's forward and backward slides. An adjusting screw is threaded onto each slide, with its rear end passing through the slide and connected to an adjusting knob. Users can not only rotate the adjusting knob to rotate the adjusting screw and move the lumbar support forward and backward, but also pull the knob upwards or press it downwards to move the lumbar support up and down, thus adjusting the depth and height of the lumbar support.

[0004] While the above solution allows the lumbar support component to be adjusted in both horizontal and vertical directions with a high degree of freedom, it has the following problems: The adjustment knob is located on the back of the seat, so the user needs to get up from the seat and operate the adjustment knob to adjust the lumbar support position every time, which is not only cumbersome, but also cannot guarantee that the adjusted lumbar support is in a position that fits the waist; in addition, the height adjustment slide is engaged by the locking protrusions on the left and right sides and the stop slots on the left and right sides of the height adjustment slide, and the height is fixed by the damping between the locking protrusions and the stop slots, which has poor stability. When the lumbar support component is subjected to greater pressure, the height adjustment slide is prone to sliding. Summary of the Invention

[0005] In view of the above-mentioned defects or deficiencies in the prior art, it is desirable to provide a high degree of freedom lumbar support adjustment device. The horizontal part of the adjustment component and the sliding component on the back of the lumbar support are provided with a gear adjustment mechanism, as are the vertical part and the back support. When the user sits on the seat, he only needs to pull the lumbar support up and down or back and forth, which causes the sliding component to slide back and forth relative to the adjustment component or the adjustment component to slide up and down relative to the back support. The locking head engages with the tooth groove in the gear groove under the elastic force of the elastic component, which makes the height and depth adjustment of the lumbar support relatively simple and has a gear feel. That is, the lumbar support can be firmly fixed in the adjusted position and has good stability.

[0006] The effect of this utility model is achieved as follows:

[0007] This application provides a high degree of freedom lumbar support adjustment device, including a back support, a lumbar support, and an adjustment component. The adjustment component has an overall bent inverted L-shaped structure, including a horizontal part extending in the horizontal direction and a vertical part extending in the vertical direction. The rear end of the lumbar support is connected to a sliding component extending in the horizontal direction. The sliding component is slidably connected to the horizontal part in the horizontal direction, and the vertical part is slidably connected to the back support in the vertical direction, thereby allowing the lumbar support to slide and adjust relative to the back support in the front-back and up-down directions.

[0008] A gear adjustment mechanism is provided between the horizontal part and the sliding part. The gear adjustment mechanism includes a gear groove and an elastic element. The gear groove is provided in one of the horizontal part and the sliding part along the horizontal direction, and the elastic element is provided in the other of the horizontal part and the sliding part. Multiple tooth grooves are recessed on one side of the gear groove. One end of the elastic element is connected to a locking element. The locking element is provided with a locking head for engaging with the tooth grooves. When the sliding part slides forward, the locking head engages with the multiple tooth grooves in sequence with the help of the elastic force of the elastic element.

[0009] A gear adjustment mechanism is also provided between the vertical part and the back support. The gear slot is provided in one of the vertical part and the back support along the vertical direction, and the elastic element is provided in the other of the vertical part and the back support. When the vertical part slides upward, the locking head engages with multiple toothed grooves in sequence with the help of the elastic force of the elastic element.

[0010] Furthermore, the gear adjustment mechanism also includes a mounting groove, an elastic element, and a locking element disposed within the mounting groove. The locking element has two ends distributed vertically, namely a swinging part and a positioning part, respectively. The locking head is disposed within the swinging part. A positioning area is formed by a recess on the side of the mounting groove near the positioning part, with the positioning part abutting against the positioning area. The swinging part can swing left and right around the positioning part. This improves the stability of the gear adjustment mechanism and makes the gear adjustment process of the locking head within the gear groove more stable and smooth.

[0011] Furthermore, a reset area is recessed on the inner wall of the mounting groove on the side opposite to the positioning area. The locking member has a switchable gear adjustment state and a gear reset state. The gear groove includes a gear part with toothed grooves and a reset part extending vertically. When the vertical part slides upward or the slider slides forward, the locking member is in the gear adjustment state, the swing part avoids the reset area and can swing left and right around the positioning part, driving the locking head to move within the gear part. When the vertical part slides downward or the slider slides backward, the locking member is in the gear reset state, the swing part engages with the reset area and remains relatively fixed, driving the locking head to move within the reset part. This makes the gear adjustment operation of the lumbar support simpler and more stable.

[0012] Furthermore, the end of the reset part near the end of the gear position part is recessed downward to form a conversion groove. When the vertical part slides upward to the highest position or the slider slides forward to the front end, the locking head engages in the conversion groove and drives the swing part to engage in the reset area, and the locking member enters the gear position reset state. This makes switching between the swing state and the reset state of the locking member easier.

[0013] Furthermore, the sliding component has a sleeve-like structure, with a connecting groove extending in the front-to-back direction in its hollow portion. The sliding component is fitted onto the horizontal part through the connecting groove and can slide back and forth relative to the horizontal part. This results in a stronger connection between the sliding component and the horizontal part, thus making the depth adjustment operation of the lumbar support more stable.

[0014] Furthermore, the sliding component includes a sleeve-shaped tube body and a mounting plate. The lower end of the tube body has a stepped mounting hole that connects to a connecting groove, and the mounting plate is detachably connected to the tube body through the mounting hole. An elastic element and a locking element are disposed on the mounting plate, and a corresponding stop groove is provided on the horizontal portion. This allows the elastic element and locking element to be installed and removed from the tube body along with the mounting plate, making the assembly and operation of the high-degree-of-freedom lumbar support adjustment device relatively simple.

[0015] Furthermore, a first positioning structure is provided between the connecting groove and the horizontal part. The first positioning structure includes a first positioning groove extending in the horizontal direction and a first positioning protrusion. The first positioning groove is provided in one of the sidewalls of the connecting groove and the horizontal part, and the first positioning protrusion is provided in the other of the sidewalls of the connecting groove and the horizontal part. By providing the first positioning structure, the sliding member and the horizontal part remain relatively fixed in the circumferential direction, that is, the sliding member can only slide back and forth relative to the horizontal part, which further improves the connection strength between the sliding member and the horizontal part, and also further improves the stability of the lumbar support depth adjustment operation.

[0016] Furthermore, a second positioning structure is provided between the vertical part and the back support. The second positioning structure includes a second positioning groove extending in the vertical direction and a second positioning protrusion. The second positioning groove is provided in one of the vertical part and the back support, and the second positioning protrusion is provided in the other. This makes the connection between the vertical part and the back support stronger, thereby making the height adjustment operation of the lumbar support more stable.

[0017] Furthermore, the rear end of the vertical section is recessed to form a second positioning groove, and the front end of the back support is correspondingly provided with a second positioning protrusion. The elastic element and the locking element are disposed in the second positioning groove, and the second positioning protrusion is correspondingly provided with a stop groove. This makes the connection structure between the vertical section and the back support more compact, and the locking element can fit tightly against the stop groove, thereby improving the stability of the lumbar support height adjustment operation.

[0018] Furthermore, a cover plate is detachably connected to the front end of the back support, with a gap between the cover plate and the back support forming a clamping groove. The front end of the cover plate has a perforated clearance opening, through which the vertical part passes and connects to the back support. The left and right ends of the vertical part protrude to form a vertical third positioning protrusion, which engages with the clamping groove. This ensures that the adjusting component and the back support are relatively fixed in the horizontal direction, resulting in good stability. Moreover, the cover plate is detachably connected to the back support, allowing for the simultaneous installation and removal of the adjusting component, making the assembly and operation of the high-degree-of-freedom lumbar support adjustment device simpler.

[0019] The high-degree-of-freedom lumbar support adjustment device provided in this application connects the back support and the lumbar support through an adjustment component. The horizontal part of the adjustment component and the sliding component on the back of the lumbar support, as well as the vertical part and the back support, are equipped with a gear adjustment mechanism. When the user is sitting in the seat, there is no need to get up from the seat. The user only needs to pull the lumbar support up and down or back and forth, which will cause the sliding component to slide back and forth relative to the adjustment component or the adjustment component to slide up and down relative to the back support. The locking head engages with the tooth groove in the gear groove under the elastic force of the elastic component, which makes the height and depth adjustment of the lumbar support relatively simple and has a gear feel. That is, the lumbar support can be firmly fixed in the adjusted position and has good stability.

[0020] Furthermore, the adjustment component is a one-piece molded structure. By designing the adjustment component as an inverted L-shaped structure, the adjustment component can simultaneously support the height and depth adjustment of the lumbar support. The structure is simple and has good stability. Attached Figure Description

[0021] Other features, objects, and advantages of this application will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0022] Figure 1 A three-dimensional structural diagram of the seat provided in the embodiments of this application;

[0023] Figure 2 This is a schematic diagram illustrating the changes in the seat after lumbar support adjustment, as provided in an embodiment of this application.

[0024] Figure 3 A schematic diagram of the connection structure between the lumbar support and the backrest bracket provided in an embodiment of this application;

[0025] Figure 4 This is a schematic diagram of the connection structure between the slider and the adjusting member provided in an embodiment of this application;

[0026] Figure 5 This is a schematic diagram of the connection structure between the adjusting member and the back support provided in an embodiment of this application;

[0027] Figure 6 This is a cross-sectional structural schematic diagram of the lumbar support adjustment device provided in the embodiments of this application;

[0028] Figure 7 A schematic diagram illustrating the change process of the gear adjustment mechanism when the lumbar support is adjusted to the most extreme or lowest position according to an embodiment of this application;

[0029] Figure 8 A schematic diagram illustrating the change process of the gear adjustment mechanism in the gear adjustment state provided in an embodiment of this application;

[0030] Figure 9 A schematic diagram illustrating the change process of the gear adjustment mechanism when the lumbar support is adjusted to the most forward or highest position according to an embodiment of this application;

[0031] Figure 10 This is a schematic diagram illustrating the change process of the gear adjustment mechanism in the gear reset state, as provided in the embodiments of this application.

[0032] The reference numerals in the attached drawings are as follows: 1-back support, 110-second positioning protrusion, 2-lumbar support, 3-adjusting component, 310-horizontal part, 311-first positioning protrusion, 320-vertical part, 321-second positioning groove, 322-third positioning protrusion, 4-sliding component, 401-connecting groove, 402-first positioning groove. 410-tube body, 411-mounting hole, 420-mounting plate, 5-gear groove, 510-gear part, 511-tooth groove, 520-reset part, 521-conversion groove, 6-elastic component, 7-locking component, 710-clamping head, 720-swinging part, 730-positioning part, 8-mounting groove, 810-positioning area, 820-reset area, 830-connecting area, 9-cover plate, 901-clamping groove, 902-clearance opening. Detailed Implementation

[0033] The present application will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the relevant utility model and not intended to limit the scope of the utility model. Furthermore, it should be noted that, for ease of description, only the parts relevant to the utility model are shown in the accompanying drawings.

[0034] Please refer to the attached document. Figure 1-10 This application provides a high degree of freedom lumbar support adjustment device, including a back support 1, a lumbar support 2, and an adjustment member 3. The adjustment member 3 is generally in the shape of a bent inverted L-shape, including a horizontal part 310 extending in the horizontal direction and a vertical part 320 extending in the vertical direction. The rear end of the lumbar support 2 is connected to a sliding member 4 extending in the horizontal direction. The sliding member 4 is slidably connected to the horizontal part 310 in the horizontal direction, and the vertical part 320 is slidably connected to the back support 1 in the vertical direction, so that the lumbar support 2 can be slidably adjusted relative to the back support 1 in the front-back and up-down directions.

[0035] A gear adjustment mechanism is provided between the horizontal part 310 and the sliding member 4. The gear adjustment mechanism includes a gear groove 5 and an elastic member 6. The gear groove 5 is arranged in one of the horizontal part 310 and the sliding member 4 in the horizontal direction, and the elastic member 6 is arranged in the other of the horizontal part 310 and the sliding member 4. A plurality of toothed grooves 511 are recessed on one side of the gear groove 5. A locking member 7 is connected to one end of the elastic member 6. The locking member 7 is provided with a locking head 710 for engaging with the toothed grooves 511. When the sliding member 4 slides forward, the locking head 710 engages with the plurality of toothed grooves 511 in sequence by means of the elastic force of the elastic member 6.

[0036] A gear adjustment mechanism is also provided between the vertical part 320 and the back support 1. The gear groove 5 is provided in one of the vertical part 320 and the back support 1 along the vertical direction, and the elastic member 6 is provided in the other of the vertical part 320 and the back support 1. When the vertical part 320 slides upward, the locking head 710 engages with multiple toothed grooves 511 in sequence by means of the elastic force of the elastic member 6.

[0037] In this embodiment, the back support 1 and the lumbar support 2 are connected by an adjusting member 3. The horizontal part 310 of the adjusting member 3 and the sliding member 4 on the rear side of the lumbar support 2, as well as the vertical part 320 and the back support 1, are provided with a gear adjustment mechanism. When the user sits on the seat, there is no need to get up from the seat. He only needs to pull the lumbar support 2 up and down or back and forth, which will cause the sliding member 4 to slide back and forth relative to the adjusting member 3 or the adjusting member 3 to slide up and down relative to the back support 1. The locking head 710 engages with the toothed groove 511 in the gear groove 5 under the elastic force of the elastic member 6, which makes the height and depth adjustment of the lumbar support 2 relatively simple and has a gear feel. That is, the lumbar support 2 can be firmly fixed in the adjusted position and has good stability.

[0038] Furthermore, the adjusting component 3 is a one-piece molded structure. By designing the adjusting component 3 as a one-piece molded inverted L-shaped structure, the adjusting component 3 can simultaneously support the height adjustment and depth adjustment of the lumbar support 2. The structure is simple and has good stability.

[0039] Please refer to the appendix. Figure 3 The lumbar support 2 features a three-zone adjustable design. The two side panels of the lumbar support 2 can rotate and adjust, meaning the overall curvature of the lumbar support 2 can be adjusted, providing a more comfortable lumbar support effect for the user. Furthermore, the rear end of the lumbar support 2 connects to the slider 4, allowing the lumbar support 2 to rotate back and forth relative to the slider 4. A spring is installed between the lumbar support 2 and the slider 4, ensuring that the lumbar support 2 always has a forward rotation tendency, thus providing more comfortable elastic support for the user's lower back. The lumbar support 2 also adaptively adjusts its tilt angle according to the user's lower back, better conforming to the waist.

[0040] The gear shift groove 5 has four toothed grooves 511, and the waist support 2 has four adjustable positions in both the vertical and horizontal directions, providing a high degree of freedom. Of course, in other embodiments of this application, the number of toothed grooves 511 in the gear shift groove 5 can also be three, five, six, etc.

[0041] Please refer to the attached document. Figure 7-10 In some embodiments of this application, the gear adjustment mechanism further includes a mounting groove 8, an elastic member 6 and a locking member 7 disposed in the mounting groove 8. The two ends of the locking member 7 distributed in the vertical direction are a swing part 720 and a positioning part 730, respectively. A locking head 710 is disposed in the swing part 720. A positioning area 810 is formed by a recess in the mounting groove 8 near the positioning part 730. The positioning part 730 abuts against the positioning area 810, and the swing part 720 can swing left and right around the positioning part 730.

[0042] In this embodiment, the installation groove 8 is used to install the elastic element 6 and the locking element 7, which improves the stability of the gear adjustment mechanism. Furthermore, the positioning area 810 engages with the positioning part 730, allowing the swing part 720 to swing around the positioning part 730. This makes the gear adjustment process of the locking head 710 in the gear slot 5 more stable and smooth.

[0043] Preferably, the elastic element 6 is a spring, which has strong elastic deformation capability and a compact structure. A connecting area 830 is recessed on the side of the mounting groove 8 away from the toothed groove 511. The elastic element 6 is mounted in the mounting groove 8 through the connecting area 830 and pushes the locking element 7 to swing, making it less likely for the elastic element 6 to detach from the mounting groove 8, thus improving stability. Of course, in other embodiments of this application, the elastic element 6 can also be rubber, a sheet spring, etc.

[0044] Please refer to the attached document. Figure 7-10In some embodiments of this application, a reset area 820 is recessed on the inner wall of the mounting groove 8 on the side opposite to the positioning area 810. The locking member 7 has a switchable gear adjustment state and a gear reset state. The gear groove 5 includes a gear part 510 with a toothed groove 511 and a reset part 520 extending in the vertical direction. When the vertical part 320 slides upward or the sliding member 4 slides forward, the locking member 7 is in the gear adjustment state. The swing part 720 avoids the reset area 820 and can swing left and right around the positioning part 730, and drives the locking head 710 to move in the gear part 510. When the vertical part 320 slides downward or the sliding member 4 slides backward, the locking member 7 is in the gear reset state. The swing part 720 is locked into the reset area 820 and remains relatively fixed, and drives the locking head 710 to move in the reset part 520.

[0045] In this embodiment, the locking member 7 switches between a gear adjustment state and a gear reset state. In the gear adjustment state, the locking member 7 is pushed by the elastic member 6, and the locking head 710 moves within the gear position portion 510 without moving along the reset portion 520 and causing the gear to revert. In the gear reset state, the swing portion 720 engages with the reset area 820 and remains relatively fixed, preventing the locking member 7 from sliding into the gear position portion 510 under the push of the elastic member 6. This allows the locking head 710 to move smoothly within the reset portion 520, thereby resetting the lumbar support 2. This makes the gear adjustment operation of the lumbar support 2 simpler and more stable.

[0046] Please refer to the attached document. Figure 7-10 In some embodiments of this application, the reset part 520 has a downward recessed conversion groove 521 at one end near the end of the gear position part 510. When the vertical part 320 slides upward to the highest position or the slider 4 slides forward to the foremost position, the locking head 710 engages with the conversion groove 521, and drives the swing part 720 to engage with the reset area 820, and the locking member 7 enters the gear position reset state. This makes it easier for the locking member 7 to switch between the swing state and the reset state.

[0047] Furthermore, when the vertical part 320 slides downward to its bottom or the sliding member 4 slides backward to its end, the locking head 710 abuts against the end of the reset part 520. When the user continues to adjust the lumbar support 2, the end of the reset part 520 pushes the locking head 710 downward, causing the locking member 7 to move downward relative to the mounting groove 8. This causes the swing part 720 to disengage from the reset area 820, the locking head 710 to enter the position part 510, and the locking member 7 to re-enter the swing state. This makes switching between the swing state and the reset state of the locking member 7 much easier.

[0048] Please refer to the attached document. Figure 4In some embodiments of this application, the slider 4 is generally in the form of a sleeve, with a connecting groove 401 extending in the front-to-back direction in its hollow portion. The slider 4 is sleeved onto the horizontal portion 310 through the connecting groove 401 and can slide back and forth relative to the horizontal portion 310. This makes the connection strength between the slider 4 and the horizontal portion 310 higher, thereby making the depth adjustment operation of the lumbar support 2 more stable.

[0049] Please refer to the attached document. Figure 4 In some embodiments of this application, the sliding member 4 includes a sleeve-shaped tube body 410 and a mounting plate 420. The lower end of the tube body 410 is provided with a stepped mounting hole 411, which connects to the connecting groove 401. The mounting plate 420 is detachably connected to the tube body 410 through the mounting hole 411. The elastic member 6 and the locking member 7 are disposed on the mounting plate 420, and the horizontal part 310 is provided with a corresponding stop groove 5.

[0050] In this embodiment, by installing the elastic element 6 and the locking element 7 on the mounting plate 420, the elastic element 6 and the locking element 7 can be installed and removed from the tube body 410 together with the mounting plate 420, making the assembly operation of the high degree of freedom lumbar support adjustment device relatively simple.

[0051] Preferably, the mounting plate 420 is detachably connected to the pipe body 410 by means of screws, which provides high connection strength and is easy to install and remove.

[0052] Please refer to the attached document. Figure 4 In some embodiments of this application, a first positioning structure is provided between the connecting groove 401 and the horizontal portion 310. The first positioning structure includes a first positioning groove 402 extending in the horizontal direction and a first positioning protrusion 311. The first positioning groove 402 is disposed on one of the sidewalls of the connecting groove 401 and the horizontal portion 310, and the first positioning protrusion 311 is disposed on the other of the sidewalls of the connecting groove 401 and the horizontal portion 310. By providing the first positioning structure, the sliding member 4 and the horizontal portion 310 are also kept relatively fixed in the circumferential direction, that is, the sliding member 4 can only slide back and forth relative to the horizontal portion 310, which further improves the connection strength between the sliding member 4 and the horizontal portion 310, and also further improves the stability of the depth adjustment operation of the lumbar support 2.

[0053] Preferably, the left and right side walls of the horizontal part 310 protrude to form first positioning protrusions 311, and the interior of the connecting groove 401 is correspondingly recessed to form two first positioning grooves 402 on the left and right sides, which improves stability.

[0054] Please refer to the attached document. Figure 5In some embodiments of this application, a second positioning structure is provided between the vertical portion 320 and the back support 1. The second positioning structure includes a second positioning groove 321 extending in the vertical direction and a second positioning protrusion 110. The second positioning groove 321 is disposed in one of the vertical portion 320 and the back support 1, and the second positioning protrusion 110 is disposed in the other of the vertical portion 320 and the back support 1. This makes the connection strength between the vertical portion 320 and the back support 1 higher, thereby making the height adjustment operation of the lumbar support 2 more stable.

[0055] Please refer to the attached document. Figure 5 In some embodiments of this application, the rear end of the vertical part 320 is recessed to form a second positioning groove 321, the front end of the back support 1 is correspondingly provided with a second positioning protrusion 110, the elastic member 6 and the locking member 7 are disposed in the second positioning groove 321, and the second positioning protrusion 110 is correspondingly provided with a stop groove 5.

[0056] In this embodiment, by installing the elastic element 6, the locking element 7, and the position groove 5 between the second positioning protrusion 110 and the second positioning groove 321, the connection structure between the vertical part 320 and the back support 1 is made more compact, and the locking element 7 can fit tightly against the position groove 5, thereby improving the stability of the height adjustment operation of the lumbar support 2.

[0057] Please refer to the attached document. Figure 5-6 In some embodiments of this application, a cover plate 9 is detachably connected to the front end of the back support 1. A gap is left between the cover plate 9 and the back support 1, which forms a clamping groove 901. An avoidance opening 902 is hollowed out at the front end of the cover plate 9. The vertical part 320 passes through the avoidance opening 902 and is connected to the back support 1. The left and right ends of the vertical part 320 protrude to form a vertical third positioning protrusion 322, which is inserted into the clamping groove 901.

[0058] In this embodiment, the vertical part 320 is clamped to the back support 1 by the cover plate 9, so that the adjusting member 3 and the back support 1 are relatively fixed in the horizontal direction, resulting in good stability. Furthermore, the cover plate 9 is detachably connected to the back support 1, and the adjusting member 3 can be installed and removed together, making the assembly and operation of the high degree of freedom lumbar support adjustment device simpler.

[0059] It should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer" used above to indicate orientation or positional relationships are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means three or more.

[0060] The above description is merely a preferred embodiment of this application and an explanation of the technical principles employed. Those skilled in the art should understand that the scope of the utility model involved in this application is not limited to the technical solutions formed by specific combinations of the above-described technical features, but should also cover other technical solutions formed by arbitrary combinations of the above-described technical features or their equivalents without departing from the inventive concept. For example, technical solutions formed by substituting the above features with (but not limited to) technical features with similar functions disclosed in this application.

Claims

1. A high degree of freedom lumbar adjustment device, characterized by, The utility model relates to a back support (1), a waist rest (2) and adjusting part (3), adjusting part (3) whole presents bending inverted L type structure, including along the horizontal direction extension horizontal part (310) and along the vertical direction extension vertical part (320), the rear end of waist rest (2) is connected with along the horizontal direction extension sliding part (4), sliding part (4) along the horizontal direction front and back sliding connection in horizontal part (310), and vertical part (320) is connected in the vertical direction up and down sliding connection in back support (1), further make waist rest (2) can be relative to back support (1) along the front and back and up and down direction sliding adjustment, Gear adjusting mechanism is arranged between the horizontal part (310) and the sliding part (4), the gear adjusting mechanism includes gear slot (5) and elastic part (6), the gear slot (5) is arranged in one of the horizontal part (310) and the sliding part (4) along the horizontal direction, the elastic part (6) is arranged in the other of the horizontal part (310) and the sliding part (4);The side recess of gear slot (5) is provided with a plurality of gear grooves (511), one end of the elastic part (6) is connected with locking part (7), the locking part (7) is provided with a clamping head (710) for being clamped with the gear groove (511), when the sliding part (4) is forwardly slid, the clamping head (710) is sequentially clamped with a plurality of gear grooves (511) by the elastic force of the elastic part (6); The gear adjusting mechanism is also arranged between the vertical part (320) and the back support (1), the gear slot (5) is arranged in one of the vertical part (320) and the back support (1) along the vertical direction, the elastic part (6) is arranged in the other of the vertical part (320) and the back support (1), when the vertical part (320) is upwardly slid, the clamping head (710) is sequentially clamped with a plurality of gear grooves (511) by the elastic force of the elastic part (6).

2. The high degree-of-freedom lumbar adjustment device of claim 1, wherein, The gear adjusting mechanism further includes mounting groove (8), the elastic part (6) and the locking part (7) are arranged in the mounting groove (8), the two ends of the locking part (7) distributed along the vertical direction are swing part (720) and positioning part (730) respectively, the clamping head (710) is arranged in the swing part (720), the side recess of the mounting groove (8) close to the positioning part (730) forms positioning area (810), the positioning part (730) is abutted in the positioning area (810), and the swing part (720) can swing left and right around the positioning part (730).

3. The high degree of freedom lumbar adjustment device of claim 2, wherein, The inner wall of the mounting groove (8) opposite to the positioning area (810) is also recessed to form a reset area (820), the locking piece (7) has a gear adjusting state and a gear reset state, the gear slot (5) includes a gear part (510) having the gear slot (511) and a reset part (520) extending in the vertical direction; when the vertical part (320) slides upward or the sliding piece (4) slides forward, the locking piece (7) is in the gear adjusting state, the swing part (720) avoids the reset area (820) and can swing left and right around the positioning part (730), and drives the clamping head (710) to move in the gear part (510); when the vertical part (320) slides downward or the sliding piece (4) slides backward, the locking piece (7) is in the gear reset state, the swing part (720) is clamped into the reset area (820) and kept relatively fixed, and drives the clamping head (710) to move in the reset part (520).

4. The high degree-of-freedom lumbar adjustment device of claim 3, wherein, The reset part (520) is recessed downward at one end close to the end of the gear part (510) to form a conversion slot (521), when the vertical part (320) slides upward to the highest end or the sliding piece (4) slides forward to the frontmost end, the clamping head (710) is clamped into the conversion slot (521), and drives the swing part (720) to be clamped into the reset area (820), and the locking piece (7) enters the gear reset state.

5. The high degree-of-freedom lumbar adjustment device of claim 1, wherein, The sliding piece (4) has a sleeve structure, and a connecting slot (401) extending in the front-back direction is formed in the hollow part, the sliding piece (4) is sleeved on the horizontal part (310) through the connecting slot (401) and can slide forward and backward relative to the horizontal part (310).

6. The high degree-of-freedom lumbar adjustment device of claim 5, wherein, The sliding piece (4) includes a sleeve-shaped tube body (410) and a mounting plate (420), a stepped mounting hole (411) is formed in the lower end of the tube body (410), the mounting hole (411) is communicated with the connecting slot (401), and the mounting plate (420) is detachably connected to the tube body (410) through the mounting hole (411); the elastic piece (6) and the locking piece (7) are arranged on the mounting plate (420), and the horizontal part (310) is correspondingly provided with the gear slot (5).

7. The high degree-of-freedom lumbar adjustment device of claim 5, wherein, First positioning structures are arranged between the connecting slot (401) and the horizontal part (310), the first positioning structures include first positioning grooves (402) extending in the horizontal direction and first positioning protrusions (311), the first positioning grooves (402) are arranged on one of the side walls of the connecting slot (401) and the horizontal part (310), and the first positioning protrusions (311) are arranged on the other one of the side walls of the connecting slot (401) and the horizontal part (310).

8. The high degree-of-freedom lumbar adjustment device of claim 1, wherein, The vertical part (320) and the back support (1) are provided with a second positioning structure, which comprises a second positioning groove (321) extending in the vertical direction and a second positioning protrusion (110), the second positioning groove (321) is arranged on one of the vertical part (320) and the back support (1), and the second positioning protrusion (110) is arranged on the other one of the vertical part (320) and the back support (1).

9. The high degree-of-freedom lumbar adjustment device of claim 8, wherein, The rear end of the vertical part (320) is recessed to form the second positioning groove (321), the front end of the back support (1) is correspondingly provided with the second positioning protrusion (110), the elastic member (6) and the locking member (7) are arranged in the second positioning groove (321), and the second positioning protrusion (110) is correspondingly provided with the gear groove (5).

10. The high degree-of-freedom lumbar adjustment apparatus of claim 1, wherein, The front end of the back support (1) is detachably connected with a cover plate (9), a spacing is left between the cover plate (9) and the back support (1), the spacing forms a clamping groove (901), the front end of the cover plate (9) is hollowed out to form an avoiding opening (902), the vertical part (320) is connected to the back support (1) through the avoiding opening (902), the left and right ends of the vertical part (320) are protruded to form vertical third positioning protrusions (322), and the third positioning protrusions (322) are clamped into the clamping groove (901).

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