High-degree-of-freedom adjustable seat

Abstract

The high-degree-of-freedom adjustable chair comprises a chair seat assembly, a chair leg assembly and a chair back assembly, the chair seat assembly comprises an adjusting piece, and the adjusting piece comprises a first adjusting part with the upper side extending in the front-back direction and a second adjusting part vertically arranged at the bottom of the first adjusting part; the second adjusting part is slidably connected to the chair leg assembly in the vertical direction, so that the chair seat assembly can slide up and down relative to the chair leg assembly; the chair back assembly comprises a supporting frame used for supporting a chair back, the supporting frame comprises a sliding part extending forwards, and the sliding part is slidably connected to the first adjusting part in the front-back direction, so that the chair back assembly can slide front and back relative to the chair seat assembly; a locking mechanism is arranged between the first adjusting part and the sliding part, the locking mechanism comprises a clamping pin and a plurality of gear grooves, the clamping pin is movably connected to one of the first adjusting part and the sliding part, and the gear grooves are formed in the other one of the first adjusting part and the sliding part; when the bayonet lock is clamped in the gear groove, the first adjusting part and the sliding part are relatively fixed; and when the bayonet lock avoids the gear groove, the sliding part can slide relative to the first adjusting part again.

Description

Technical Field

[0001] This utility model generally relates to the field of seating technology, and specifically to a highly adjustable seat with a high degree of freedom. Background Technology

[0002] For children focused on their studies, most of their day is spent at their desks. Prolonged sitting can easily lead to spinal curvature and affect their physical development. Therefore, choosing a suitable study chair to help children correct their posture is crucial. In addition to providing basic seating support, existing children's chairs often feature height-adjustable seats and backrests to accommodate children of different sizes and their height changes as they grow.

[0003] Most children's chairs on the market today consist of a vertical column. The seat and backrest each have a connecting sleeve that attaches to the column, allowing the seat and backrest to slide up and down along the column. The connecting sleeve has a knob screw, and the column has multiple vertically cut-out holes for adjusting the seat and backrest height. Users can fix the seat and backrest height by turning the knob screw until it engages with a hole. This allows users to easily adjust the seat and backrest height according to their child's height, and the seat height adjustment is quite simple.

[0004] However, the above solution has the following problems: for children of different body sizes, the distance between their buttocks and backrest will vary to some extent, but the seat and backrest of the above children's chair can only be adjusted in height by sliding along the upright, which makes the chair unsuitable for children of all body sizes and lacks practicality. Summary of the Invention

[0005] In view of the above-mentioned defects or deficiencies in the prior art, it is desirable to provide a highly adjustable seat with a high degree of freedom. The adjusting part can not only slide up and down relative to the chair leg assembly to adjust the height of the seat assembly and the chair back assembly, but also slide back and forth on the first adjusting part to adjust the seat depth. This makes the seat highly adjustable, adaptable to users of various body types, and has good practicality.

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

[0007] This application provides a highly adjustable seat with a high degree of freedom, including a seat assembly, a leg assembly, and a backrest assembly. The seat assembly includes an adjusting member, which includes a first adjusting portion extending forward and backward along its upper side and a second adjusting portion vertically disposed at the bottom of the first adjusting portion. The second adjusting portion is slidably connected to the leg assembly in a vertical direction, allowing the seat assembly to slide up and down relative to the leg assembly. The backrest assembly includes a support frame for supporting the backrest, and the support frame includes a sliding portion extending forward. The sliding portion is slidably connected to the first adjusting portion in a forward and backward direction, allowing the backrest assembly to slide forward and backward relative to the seat assembly. A locking mechanism is provided between the first adjusting portion and the sliding portion. The locking mechanism includes a locking pin and multiple position slots. The locking pin is movably connected to one of the first adjusting portion and the sliding portion, and the multiple position slots are formed in the other of the first adjusting portion and the sliding portion. When the locking pin engages with the position slot, the first adjusting portion and the sliding portion are relatively fixed. When the locking pin avoids the position slot, the sliding portion can slide again relative to the first adjusting portion.

[0008] Furthermore, the locking mechanism also includes a locking member, one side of which protrudes to form a latch; the first adjusting part is hollowed out to form multiple gear slots distributed along the front-back direction, and the sliding part is hollowed out along the left-right direction with mounting holes; the latch passes through the mounting holes and engages with the gear slots, and the locking member can slide left and right relative to the sliding part, causing the latch to engage or disengage from the gear slots. Gear adjustment is achieved by adjusting the latch's insertion or disengagement from the gear slots through the locking member, and the seat depth adjustment operation is made simpler by pulling the locking member to drive the sliding part to slide back and forth.

[0009] Furthermore, the locking element is a latching knob with an internally threaded mounting hole, through which the locking element is screwed to the sliding part. This not only makes the installation and removal of the locking element more convenient, but also facilitates the adjustment of the latching pin to engage or avoid the gear slot, further improving the ease of operation for adjusting the seat depth gear.

[0010] Furthermore, the first adjustment part is tilted, with the tilt direction from front to back and from low to high. When the user adjusts the seat depth by moving the sliding part forward and backward, the distance between the backrest and the seat will also change accordingly, making the seat adjustment process more in line with the actual changes of the human body and more ergonomic.

[0011] Furthermore, a first positioning mechanism is provided between the first adjusting part and the sliding part. The first positioning mechanism includes a first positioning groove extending in the front-rear direction. The first positioning groove is recessed in the first adjusting part or the sliding part, and one of the front and rear sides of the first positioning groove is open. The first adjusting part or the sliding part is engaged with the first positioning groove through the opening. The first adjusting part and the sliding part are engaged with each other, thereby being relatively fixed in the vertical direction, resulting in higher connection strength and better stability. Moreover, the first adjusting part and the sliding part can be engaged with the first positioning groove from the opening, making installation and disassembly more convenient. Furthermore, the first adjusting part and the sliding part are more compact in appearance and integrated into a whole, making the seat more integrated and aesthetically pleasing.

[0012] Furthermore, a second positioning mechanism is provided between the first adjusting part and the sliding part. The second positioning mechanism includes a positioning protrusion and a second positioning groove extending in the front-rear direction. The positioning protrusion is located in one of the first adjusting part and the sliding part, and the second positioning groove is located in the other of the first adjusting part and the sliding part. When the sliding part slides back and forth relative to the first adjusting part, the positioning protrusion slides within the second positioning groove. This not only fixes the first adjusting part and the sliding part relatively in the vertical direction, but also limits the sliding distance of the sliding part, preventing the sliding part from detaching from the first adjusting part, thus improving the connection strength and stability.

[0013] Furthermore, a second positioning groove is formed by hollowing out the upper edge of the first adjusting part in the front-back direction, and a positioning protrusion is correspondingly provided on the sliding part; the second positioning mechanism also includes a stop member, which is detachably connected to the end of the positioning protrusion away from the sliding part, and the width of the stop member is greater than the second positioning groove, so that the first adjusting part is clamped between the stop member and the sliding part. This makes the first adjusting part and the sliding part relatively fixed in the left-right direction, further improving the connection strength and stability.

[0014] Furthermore, a receiving groove is recessed on the side of the first adjusting part away from the sliding part, and a stop member is located in the receiving groove. A cover plate is detachably provided on the first adjusting part, and the cover plate covers the receiving groove. This not only protects the stop member in the receiving groove, but also makes the seat more integrated and aesthetically pleasing in appearance.

[0015] Furthermore, the chair leg assembly includes a support leg, which is a sleeve-like structure with a connecting groove formed in its hollow portion. The second adjustment part is slidably connected to the support leg through the connecting groove, allowing the adjustment member to slide up and down relative to the support leg. By setting the support leg as a sleeve-like structure fitted onto the second adjustment part, the connection strength between the adjustment member and the support leg is high, thereby making the seat height adjustment operation of the seat more stable.

[0016] Furthermore, the chair leg assembly includes two support legs, left and right, each with an adjustable component slidably connected to it. The support frame has a curved U-shaped structure, including a backrest connection portion arranged laterally on the upper side. The left and right ends of the backrest connection portion are bent forward to form two sliding portions, which are slidably connected to the adjustable components on both sides. The support frame and support legs are connected by two sets of adjustable components, allowing for height and depth adjustment, resulting in better stability.

[0017] The highly adjustable chair provided in this application features an adjustable component on the seat assembly. The support frame is slidably connected to the first adjusting part of the adjustable component via a sliding part on its front side, allowing the backrest assembly to move back and forth relative to the seat assembly to adjust the seat depth. The adjustable component not only slides up and down relative to the leg assembly via a second adjusting part to adjust the height of the seat and backrest assemblies, but also slides back and forth on the first adjusting part via a sliding part to adjust the seat depth. This provides a high degree of adjustment freedom, accommodating users of various body types and offering good practicality. Furthermore, the seat depth adjustment is achieved through a locking mechanism using a latch and a locking slot, ensuring good stability. Attached Figure Description

[0018] 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:

[0019] Figure 1 A three-dimensional structural diagram of the seat provided in the embodiments of this application;

[0020] Figure 2 A schematic diagram of the side structure of the seat when the seat depth is relatively small, provided for an embodiment of this application;

[0021] Figure 3 A schematic diagram of the side structure of the seat when the seat depth is large, provided for an embodiment of this application;

[0022] Figure 4 A schematic diagram of the connection structure between the chair back assembly, chair seat assembly, and chair leg assembly provided in an embodiment of this application;

[0023] Figure 5 A schematic diagram of the connection structure between the sliding part and the first adjusting part provided in an embodiment of this application;

[0024] Figure 6 A schematic diagram of the connection structure between the first adjustment part and the second positioning mechanism provided in the embodiments of this application;

[0025] Figure 7 This is a schematic diagram of the internal structure of the locking component provided in an embodiment of this application;

[0026] Figure 8 A cross-sectional structural diagram of the first adjustment part when the seat depth is small, provided in an embodiment of this application;

[0027] Figure 9 A cross-sectional view of the first adjustment part when the locking member is unlocked, as provided in the embodiments of this application;

[0028] Figure 10 A cross-sectional structural diagram of the first adjustment part when the seat depth is large, provided in an embodiment of this application;

[0029] Figure 11 This is a schematic diagram of the connection structure between the adjusting member and the supporting leg provided in an embodiment of this application.

[0030] The reference numerals in the attached figures are as follows: 1-Adjusting component, 110-First adjusting part, 111-Gear slot, 112-First positioning slot, 113-Second positioning slot, 114-Receiving slot, 115-Cover plate, 116-Third positioning slot, 120-Second adjusting part, 2-Support frame, 210-Sliding part, 211-Mounting hole, 212-Positioning protrusion, 213-Stop component, 220-Backrest connecting part, 3-Locking component, 310-Snap pin, 320-Knob part, 321-First connecting hole, 330-Mounting part, 331-Second connecting hole, 340-Spring, 4-Chair leg, 401-Connecting slot, 5-Backrest, 6-Seat, 610-Seat frame, 7-Armrest. Detailed Implementation

[0031] 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.

[0032] Please refer to the attached document. Figure 1-11This application provides a highly adjustable chair with a high degree of freedom, including a seat assembly, a leg assembly, and a backrest assembly. The seat assembly includes an adjusting member 1, which includes a first adjusting portion 110 extending forward and backward along its upper side and a second adjusting portion 120 vertically disposed at the bottom of the first adjusting portion 110. The second adjusting portion 120 is slidably connected to the leg assembly in a vertical direction, allowing the seat assembly to slide up and down relative to the leg assembly. The backrest assembly includes a support frame 2 for supporting the backrest, which includes a forward-extending sliding portion 210 slidably connected to the first adjusting portion 110 in a forward and backward direction. This allows the backrest assembly to slide back and forth relative to the seat assembly. A locking mechanism is provided between the first adjustment part 110 and the sliding part 210. The locking mechanism includes a locking pin 310 and multiple position slots 111. The locking pin 310 is movably connected to one of the first adjustment part 110 and the sliding part 210, and the multiple position slots 111 are formed in the other of the first adjustment part 110 and the sliding part 210. When the locking pin 310 is engaged with the position slot 111, the first adjustment part 110 and the sliding part 210 are relatively fixed. When the locking pin 310 avoids the position slot 111, the sliding part 210 can slide again relative to the first adjustment part 110.

[0033] In this embodiment, by providing an adjusting member 1 on the seat assembly, the support frame 2 is slidably connected to the first adjusting part 110 of the adjusting member 1 via a sliding part 210 on the front side, thereby allowing the backrest assembly to move back and forth relative to the seat assembly to adjust the seat depth. The adjusting member 1 not only slides up and down relative to the leg assembly via the second adjusting part 120 to adjust the height of the seat assembly and backrest assembly, but also slides back and forth on the first adjusting part 110 via the sliding part 210 to adjust the seat depth, resulting in a high degree of freedom in seat adjustment, adaptable to users of various body types, and good practicality. Furthermore, the seat depth adjustment is achieved through the engagement of the locking pin 310 and the gear slot 111, providing good stability.

[0034] The first adjustment part 110 and the second adjustment part 120 are detachably connected by screws, which provides a high connection strength and is easy to install.

[0035] Please refer to the attached document. Figure 7-10 In some embodiments of this application, the locking mechanism further includes a locking member 3, with a locking pin 310 protruding from one side; the first adjusting part 110 is hollowed out to form a plurality of gear slots 111 distributed along the front-back direction, and the sliding part 210 is hollowed out with mounting holes 211 along the left-right direction; the locking pin 310 passes through the mounting hole 211 and engages with the gear slot 111, and the locking member 3 can slide left and right relative to the sliding part 210, and drive the locking pin 310 to engage with or avoid the gear slot 111.

[0036] In this embodiment, the gear adjustment is achieved by adjusting the locking pin 310 to insert or disengage from the gear slot 111 by setting the locking member 3 exposed on the sliding part 210. Furthermore, the sliding part 210 can be moved back and forth by pulling the locking member 3, making the seat depth adjustment operation more convenient.

[0037] Of course, in other embodiments of this application, multiple gear slots 111 can be formed by hollowing out the side wall of the sliding part 210, and the locking member 3 can be slidably connected to the first adjustment part 110 and drive the locking pin 310 to insert into or avoid the gear slots 111 on the sliding part 210 to achieve gear adjustment.

[0038] Please refer to the attached document. Figure 7-10 In some embodiments of this application, the locking member 3 is a snap-lock knob, the mounting hole 211 is an internal threaded hole, and the locking member 3 is screwed to the sliding part 210 through the mounting hole 211.

[0039] In this embodiment, the adjusting member 3 includes an outer knob portion 320 and a mounting portion 330. The mounting portion 330 has an external thread and is threadedly engaged with the mounting hole 211. The front end of the knob portion 320 is recessed and has a first connecting hole 321. The rear side of the mounting portion 330 and the connecting hole 321 are both hexagonal structures, allowing the knob portion 320 to move axially relative to the mounting portion 330 and be relatively fixed in the circumferential direction. A second connecting hole 331 is formed by hollowing out the middle of the mounting portion 330. A locking pin 310 passes through the second connecting hole 331 and is fixed to the knob portion 320, allowing the knob portion 320 to drive the locking pin 310 to slide relative to the mounting portion 330. A spring 340 is provided between the locking pin 310 and the mounting portion 330, and the locking pin 310 always tends to engage with the gear slot 111 due to the elasticity of the spring 340. Please refer to the appendix. Figure 8-9 When adjusting the seat depth, the user simply pulls the knob 320 outward to disengage the locking pin 310 from the position slot 111. Then, the user can drag the knob 320 back and forth to move the sliding part 210 back and forth to adjust the seat depth. Please refer to the attached document. Figure 10 When a fixed seat depth is required, simply loosen the knob 320. The locking pin 310 automatically engages with the gear slot 111 under the elastic force of the spring 340, thereby fixing the sliding part 210 to the first adjustment part 110. Thus, by setting the locking member 3 as a locking pin knob, not only is the installation and removal of the locking member 3 more convenient, but it also facilitates adjusting the locking pin 310 to engage or avoid the gear slot 111, further improving the ease of seat depth adjustment operation.

[0040] Please refer to the attached document. Figure 2-3 In some embodiments of this application, the first adjustment part 110 is inclined, and the inclination direction is from front to back and from low to high.

[0041] In this embodiment, as children grow, their backs and legs develop simultaneously. This means that while adjusting the seat depth to accommodate the child's leg growth, the user also needs to adjust the backrest height to accommodate the child's back development. Therefore, by tilting the first adjustment part 110 upwards and backwards, the distance between the backrest and seat changes accordingly when the user adjusts the seat depth using the sliding part 210. This makes the seat adjustment process more in line with the actual changes in the human body and more ergonomic.

[0042] Please refer to the attached document. Figure 5 In some embodiments of this application, a first positioning mechanism is provided between the first adjusting part 110 and the sliding part 210. The first positioning mechanism includes a first positioning groove 112 extending in the front-back direction. The first positioning groove 112 is recessed in the first adjusting part 110 or the sliding part 210. One side of the first positioning groove 112 is open, and the first adjusting part 110 or the sliding part 210 is engaged into the first positioning groove 112 from the opening.

[0043] In this embodiment, by providing the first positioning groove 112, the first adjusting part 110 and the sliding part 210 are interlocked, thereby fixing them relatively in the vertical direction, resulting in higher connection strength and better stability. Furthermore, the first adjusting part 110 and the sliding part 210 can be inserted into the first positioning groove 112 from the opening, making installation and disassembly convenient. Moreover, by providing the first positioning groove 112, the first adjusting part 110 and the sliding part 210 are more compact and integrated into a single unit, making the seat more aesthetically pleasing and cohesive in appearance.

[0044] Preferably, a first positioning groove 112 is recessed on the first adjusting portion 110, and the first positioning groove 112 has a rear opening. Of course, in other embodiments of this application, the first positioning groove 112 may also be formed on the sliding portion 210, and the first positioning groove 112 may have a front opening.

[0045] Please refer to the attached document. Figure 6 In some embodiments of this application, a second positioning mechanism is provided between the first adjusting part 110 and the sliding part 210. The second positioning mechanism includes a positioning protrusion 212 and a second positioning groove 113 extending in a front-back direction. The positioning protrusion 212 is disposed in one of the first adjusting part 110 and the sliding part 210, and the second positioning groove 113 is formed in the other of the first adjusting part 110 and the sliding part 210. When the sliding part 210 slides back and forth relative to the first adjusting part 110, the positioning protrusion 212 slides in the second positioning groove 113.

[0046] In this embodiment, by setting the positioning protrusions 212 and the second positioning groove 113 that interlock with each other, not only are the first adjusting part 110 and the sliding part 210 fixed relative to each other in the vertical direction, but the sliding distance of the sliding part 210 is also limited, preventing the sliding part 210 from detaching from the first adjusting part 110, thereby improving the connection strength and stability.

[0047] Please refer to the attached document. Figure 6 In some embodiments of this application, a second positioning groove 113 is formed by hollowing out the upper edge of the first adjusting part 110 along the front-back direction, and a positioning protrusion 212 is correspondingly disposed on the sliding part 210; the second positioning mechanism also includes a stop member 213, which is detachably connected to the end of the positioning protrusion 212 away from the sliding part 210, and the width of the stop member 213 is greater than the second positioning groove 113, so that the first adjusting part 110 is clamped between the stop member 213 and the sliding part 210. This makes the first adjusting part 110 and the sliding part 210 relatively fixed in the left-right direction, further improving the connection strength and stability.

[0048] Preferably, the first adjusting part 110 has two upper and lower second positioning grooves 113, and the sliding part 210 is also provided with two positioning protrusions 212. These are connected by two sets of second positioning mechanisms, further enhancing the connection strength. A third positioning groove 116 extending forward and backward is also recessed on the side of the first adjusting part 110 away from the sliding part 210. When the sliding part 210 slides forward and backward, the stop member 213 engages within the third positioning groove 116 and slides forward and backward along the third positioning groove 116, resulting in a higher connection strength between the stop member 213 and the first adjusting part 110, and a smoother sliding process for the sliding part 210. The stop member 213 is detachably connected to the positioning protrusions 212 by screws, resulting in a high connection strength between the two and convenient installation and removal of the stop member 213.

[0049] Please refer to the attached document. Figure 6 In some embodiments of this application, the first adjusting part 110 is recessed on the side away from the sliding part 210 with a receiving groove 114, the stop member 213 is located in the receiving groove 114, and the first adjusting part 110 is detachably provided with a cover plate 115, which covers the receiving groove 114.

[0050] In this embodiment, by providing a cover plate 115 to cover the receiving groove 114, not only is the stop member 213 inside the receiving groove 114 protected, but the seat is also made to look more integrated and beautiful.

[0051] Please refer to the attached document. Figure 11In some embodiments of this application, the chair leg assembly includes a support leg 4, which is a sleeve-like structure with a connecting groove 401 formed in its hollow portion. The second adjustment part 120 is slidably connected to the support leg 4 through the connecting groove 401, allowing the adjustment member 1 to slide up and down relative to the support leg 4. By setting the support leg 4 as a sleeve-like structure fitted onto the second adjustment part 120, the connection strength between the adjustment member 1 and the support leg 4 is higher, thereby making the seat height adjustment operation of the seat more stable.

[0052] Preferably, the second adjustment part 120 and the support leg 4 are adjusted by a screw mechanism commonly used in the prior art, which is a stepless adjustment, making the seat height adjustment operation more stable and smooth. This patent will not elaborate further.

[0053] Please refer to the attached document. Figure 4 In some embodiments of this application, the chair leg assembly includes two support legs 4, each slidably connected to an adjusting member 1. The support frame 2 is a curved U-shaped structure, including a backrest connecting portion 220 arranged laterally on the upper side. The left and right ends of the backrest connecting portion 220 are bent forward to form two sliding portions 210, which are slidably connected to the adjusting members 1 on both sides. The support frame 2 and the support legs 4 are connected by two sets of adjusting members 1, allowing for height and depth adjustment, resulting in better stability.

[0054] The chair back detachably connects to the front end of the backrest connecting part 220, which is used to support the user's back. The two sliding parts 210 are inclined forward and downward, with the same inclination as the first adjustment part 110. Each of the sliding parts 210 on both sides is rotatably connected to an armrest 7 to support the user's arms. The two left and right adjustment parts 1 are connected by a horizontally arranged seat frame 610, and the top of the seat frame 610 is connected to a seat 6 for supporting the user's buttocks.

[0055] 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.

[0056] 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 adjustable chair, characterized by, The chair comprises a seat assembly, a leg assembly and a back assembly. The seat assembly comprises an adjusting member (1), which comprises a first adjusting part (110) extending in front-rear direction and a second adjusting part (120) vertically arranged at the bottom of the first adjusting part (110). The second adjusting part (120) is slidingly connected to the leg assembly in vertical direction, so that the seat assembly can slide up and down relative to the leg assembly. The back assembly comprises a support frame (2) for supporting the back. The support frame (2) comprises a sliding part (210) extending forward, which is slidingly connected to the first adjusting part (110) in front-rear direction, so that the back assembly can slide forward and backward relative to the seat assembly. A locking mechanism is arranged between the first adjusting part (110) and the sliding part (210). The locking mechanism comprises a latch (310) and a plurality of gear slots (111). The latch (310) is movably connected to one of the first adjusting part (110) and the sliding part (210), and the plurality of gear slots (111) are formed in the other one of the first adjusting part (110) and the sliding part (210). When the latch (310) is engaged with the gear slot (111), the first adjusting part (110) and the sliding part (210) are fixed relative to each other. When the latch (310) avoids the gear slot (111), the sliding part (210) can slide relative to the first adjusting part (110) again.

2. The high degree of freedom adjustable chair according to claim 1, wherein, The locking mechanism further comprises a locking member (3), one side of which protrudes to form the latch (310). The first adjusting part (110) is hollowed to form a plurality of gear slots (111) distributed in front-rear direction. The sliding part (210) is hollowed to form a mounting hole (211) in left-right direction. The latch (310) passes through the mounting hole (211) and is engaged with the gear slot (111). The locking member (3) can slide left and right relative to the sliding part (210) and drive the latch (310) to engage or avoid the gear slot (111).

3. The high degree of freedom adjustable chair of claim 2, wherein, The locking member (3) is a latch knob, and the mounting hole (211) is an internally threaded hole. The locking member (3) is screwed to the sliding part (210) through the mounting hole (211).

4. The high degree of freedom adjustable chair of claim 1, wherein, The first adjusting part (110) is arranged obliquely, and the oblique direction is from front to back and from low to high.

5. The high degree of freedom adjustable chair of claim 1, wherein, A first positioning mechanism is arranged between the first adjusting part (110) and the sliding part (210). The first positioning mechanism comprises a first positioning slot (112) extending in front-rear direction. The first positioning slot (112) is recessed in the first adjusting part (110) or the sliding part (210). One side of the first positioning slot (112) is open, and the first adjusting part (110) or the sliding part (210) is engaged with the first positioning slot (112) from the opening.

6. The high degree of freedom adjustable chair of claim 1, wherein, The second positioning mechanism is arranged between the first adjusting part (110) and the sliding part (210), and comprises a positioning protrusion (212) and a second positioning groove (113) extending in the front-back direction, the positioning protrusion (212) is arranged on one of the first adjusting part (110) and the sliding part (210), and the second positioning groove (113) is arranged on the other one of the first adjusting part (110) and the sliding part (210); when the sliding part (210) slides relative to the first adjusting part (110) in the front-back direction, the positioning protrusion (212) slides in the second positioning groove (113).

7. The high degree of freedom adjustable chair of claim 6, wherein, The second positioning groove (113) is hollowed out on the first adjusting part (110) in the front-back direction, and the positioning protrusion (212) is arranged on the sliding part (210) correspondingly; the second positioning mechanism further comprises a stop piece (213), the stop piece (213) is detachably connected to one end of the positioning protrusion (212) away from the sliding part (210), and the width of the stop piece (213) is greater than that of the second positioning groove (113), so that the first adjusting part (110) is clamped between the stop piece (213) and the sliding part (210).

8. The high degree of freedom adjustable chair of claim 7, wherein, The first adjusting part (110) is recessed on one side away from the sliding part (210) to form a containing groove (114), the stop piece (213) is arranged in the containing groove (114), and the first adjusting part (110) is detachably provided with a cover plate (115) covering the containing groove (114).

9. The high degree of freedom adjustable chair of claim 1, wherein, The chair leg assembly comprises a support leg (4) in a sleeve structure, wherein a hollow part forms a connecting groove (401), and the second adjusting part (120) is slidably connected to the support leg (4) through the connecting groove (401), so that the adjusting part (1) can slide up and down relative to the support leg (4).

10. The high degree of freedom adjustable chair of claim 1, wherein, The chair leg assembly comprises two support legs (4) arranged on the left and right sides, and the adjusting part (1) is slidably connected to each of the two support legs (4); the support frame (2) is a curved U-shaped structure comprising a chair back connecting part (220) arranged horizontally on the upper side, and the left and right ends of the chair back connecting part (220) are bent forward to form two sliding parts (210), and the two sliding parts (210) are slidably connected to the adjusting part (1) on the left and right sides, respectively.

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