Hand-cranked lifting single-back child learning chair

Abstract

The utility model belongs to the technical field of children's chair, especially relate to a hand -operated lifting single -back children's study chair. Including chair seat assembly, chair foot assembly, vacuum type brake device, lifting vertical tube subassembly and footrest assembly. Chair foot assembly is located below chair seat assembly. Vacuum type brake device is connected with chair foot assembly. The upper end of lifting vertical tube subassembly is used for connecting with chair seat assembly, and the lower end is connected with chair foot assembly, and footrest assembly is located in the front side of chair foot assembly. Through setting up lifting vertical tube subassembly, can adjust the height of chair seat assembly, be applicable to children of different height, prevent the foot to hang. Secondly, through setting up footrest assembly in the front side of chair foot assembly, children can put feet on chair foot assembly, thereby further preventing the foot to hang. In addition, through connecting vacuum brake device on chair foot assembly, can utilize vacuum brake device to brake and fix this children's study chair, avoid the problem that this children's study chair is difficult to brake.

Description

Technical Field

[0001] This utility model belongs to the field of children's chair technology, and specifically relates to a hand-cranked height-adjustable single-back children's study chair. Background Technology

[0002] Inappropriate seat height and incorrect sitting posture are among the main causes of myopia in children and teenagers.

[0003] However, existing chairs suffer from leg sag during use, and children are too light to brake properly during seat movement. Therefore, it is necessary to design a hand-cranked, height-adjustable single-back children's study chair to solve these problems. Utility Model Content

[0004] To address the aforementioned problems, this utility model provides a hand-cranked height-adjustable single-back children's study chair, thereby resolving the issues raised in the background section.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a hand-cranked height-adjustable single-back children's study chair, comprising:

[0006] Seat assembly;

[0007] A chair leg assembly, located below the chair seat assembly;

[0008] A vacuum brake device, wherein the vacuum brake device is connected to the chair leg assembly;

[0009] A lifting riser assembly, wherein the upper end of the lifting riser assembly is used to connect to the seat assembly and the lower end is used to connect to the leg assembly;

[0010] A foot pedal assembly located in front of the chair leg assembly.

[0011] Furthermore, the hand-cranked height-adjustable single-back children's learning chair also includes a backrest assembly, which is configured as a single-back assembly. The single-back assembly includes a back pad, an inner back shell, an outer back shell, locking screws, and a backrest upright tube connecting assembly. The back pad, the inner back shell, and the outer back shell are distributed sequentially from front to back. The back pad is connected to the inner back shell, and the outer back shell is connected to the inner back shell by locking screws. The outer back shell is connected to the height-adjustable upright tube assembly through the backrest upright tube connecting assembly.

[0012] Furthermore, the chair leg assembly includes a pentagonal metal column, a front leg tube, a rear leg tube, and chair wheels. At least two of the front leg tubes are connected to the front end of the pentagonal metal column, and at least two of the rear leg tubes are connected to the rear end of the pentagonal metal column. The chair wheels are connected to the front leg tube and the rear leg tube.

[0013] Furthermore, the chair leg assembly also includes a decorative cover, which is connected to the pentagonal metal column. The decorative cover has an egg-shaped hole. The lower end of the lifting upright tube assembly passes obliquely through the egg-shaped hole and is connected to the bottom surface of the pentagonal metal column. The bottom of the pentagonal metal column has three through holes in triangular positions. The lower end face of the lifting upright tube assembly is designed with three screw holes in triangular positions. The three through holes and the three screw holes correspond one-to-one.

[0014] Furthermore, the vacuum braking device includes a connecting rod, a suction cup, and a crank handle. The upper end of the connecting rod is connected to the front foot tube, and the lower end is rotatably connected to the suction cup. The crank handle is connected to the upper end of the suction cup.

[0015] Furthermore, the foot pedal assembly is slidably connected to the chair leg assembly in the front-to-back direction.

[0016] The technical effects and advantages of this utility model are as follows:

[0017] 1. By setting up a lifting upright assembly, the height of the seat assembly can be adjusted to suit children of different heights and prevent their feet from getting stuck.

[0018] 2. By installing a foot pedal assembly on the front side of the chair leg assembly, children can place their feet on the chair leg assembly, thereby further preventing their feet from getting caught.

[0019] 3. By connecting a vacuum brake device to the chair leg assembly, the children's study chair can be braked and fixed using the vacuum brake device, thus avoiding the problem of the children's study chair being difficult to brake.

[0020] Other features and advantages of this invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objectives and other advantages of this invention can be realized and obtained through the structures pointed out in the description and drawings. Attached Figure Description

[0021] 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 some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 A schematic diagram of the structure of the hand-cranked height-adjustable single-back children's study chair according to an embodiment of the present invention is shown;

[0023] Figure 2 A schematic diagram of the backrest assembly according to an embodiment of the present invention is shown;

[0024] Figure 3 A schematic diagram of the chair leg assembly according to an embodiment of the present invention is shown;

[0025] Figure 4 A schematic diagram of the structure of the pentagonal metal column according to an embodiment of the present invention is shown;

[0026] Figure 5 This invention presents a structural schematic diagram of the pentagonal metal column from another perspective of an embodiment of the present invention;

[0027] Figure 6 A schematic diagram of the structure of a vacuum braking device according to an embodiment of the present invention is shown.

[0028] Reference numerals: 1. Seat assembly; 2. Leg assembly; 3. Vacuum brake device; 4. Lifting upright tube assembly; 5. Foot pedal assembly; 6. Backrest assembly; 7. Backrest padding; 8. Outer back shell; 9. Locking screw; 10. Elastomer connecting arm ring assembly; 11. Connecting ring tube sleeve; 12. Pentagonal metal column; 13. Front leg tube; 14. Rear leg tube; 15. Chair wheel; 16. Decorative cover; 17. Egg-shaped hole; 18. Through hole; 19. Connecting rod; 20. Suction cup; 21. Crank handle. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0030] The positive X-axis points forward, and the negative X-axis points backward; the positive Y-axis points left, and the negative Y-axis points right; the positive Z-axis points upward, and the negative Z-axis points downward.

[0031] like Figure 1 As shown in the figure, a hand-cranked, height-adjustable single-back children's study chair according to an embodiment of the present invention includes a seat assembly 1, a leg assembly 2, a vacuum brake device 3, a lifting upright tube assembly 4, and a foot pedal assembly 5. The leg assembly 2 is located below the seat assembly 1. The vacuum brake device 3 is connected to the leg assembly 2. The upper end of the lifting upright tube assembly 4 is connected to the seat assembly 1, and the lower end is connected to the leg assembly 2. The foot pedal assembly 5 is located in front of the leg assembly 2.

[0032] Specifically, by setting up the lifting upright assembly 4, the height of the seat assembly 1 can be adjusted to suit children of different heights and prevent their feet from getting stuck. Secondly, by setting up a footrest assembly 5 on the front side of the chair leg assembly 2, children can place their feet on the chair leg assembly 2, thereby further preventing their feet from getting stuck. In addition, by connecting a vacuum brake device to the chair leg assembly 2, the children's study chair can be braked and fixed using the vacuum brake device, avoiding the problem of the children's study chair being difficult to brake.

[0033] In this embodiment, the lifting upright assembly 4 is configured as a device that can extend and retract in the vertical direction to adjust the vertical distance between the seat assembly 1 and the leg assembly 2. Furthermore, an armrest assembly is connected to the seat assembly 1.

[0034] like Figure 1 and Figure 2 As shown, optionally, the hand-cranked height-adjustable single-back children's learning chair also includes a backrest assembly 6. The backrest assembly 6 is configured as a single-back assembly. The single-back assembly includes a backrest 7, an inner back shell, an outer back shell 8, a locking screw 9, and a backrest upright tube connecting assembly. The backrest 7, the inner back shell, and the outer back shell 8 are distributed sequentially from front to back. The backrest 7 is connected to the inner back shell. The outer back shell 8 is connected to the inner back shell through the locking screw 9. The outer back shell 8 is connected to the height-adjustable upright tube assembly 4 through the backrest upright tube connecting assembly.

[0035] Specifically, the backrest 7 and the inner back shell are glued together, and the outer back shell 8 is connected and locked to the inner back shell by a locking screw 9 and a pre-embedded nut. The outer back shell 8 is also connected to the chair back upright connecting assembly and then installed on the lifting upright assembly 4. To ensure comfort when leaning against the chair back, the chair back upright connecting assembly includes at least an elastic connecting arm assembly 10, a screw locking component, and a connecting ring sleeve 11. The screw locking component ensures that the chair back does not slip when connected to the lifting upright assembly 4, and the connecting ring sleeve 11 is also designed to prevent slippage. It is located inside the elastic connecting arm assembly 10 and fits on the outside of the lifting upright assembly 4.

[0036] like Figure 3 As shown, optionally, the chair leg assembly 2 includes a pentagonal metal column 12, a front leg tube 13, a rear leg tube 14, and a chair wheel 15. The front end of the pentagonal metal column 12 is connected to at least two of the front leg tubes 13, and the rear end of the pentagonal metal column 12 is connected to at least two of the rear leg tubes 14. The chair wheel 15 is connected to the front leg tube 13 and the rear leg tube 14.

[0037] Specifically, by setting the front leg tube 13, the rear leg tube 14 and the chair wheel 15, the sliding friction of the chair leg assembly 2 relative to the ground can be converted into rolling friction by the chair wheel 15, thereby making it easier to push the child chair.

[0038] like Figure 4 and Figure 5 As shown, optionally, the chair leg assembly 2 also includes a decorative cover 16, which is connected to the pentagonal metal column 12. The decorative cover 16 has an egg-shaped hole 17. The lower end of the lifting tube assembly 4 obliquely passes through the egg-shaped hole 17 and is connected to the bottom surface of the pentagonal metal column 12. The bottom of the pentagonal metal column 12 has three through holes 18 in triangular positions. The lower end face of the lifting tube assembly 4 is designed with three screw holes in triangular positions. The three through holes 18 correspond one-to-one with the three screw holes.

[0039] Specifically, an egg-shaped hole 17 is provided above the decorative cover 16 of the pentagonal metal column 12. Its function is to allow the lower end of the lifting tube assembly 4 to pass obliquely through the egg-shaped hole 17 and be inserted into the bottom surface of the pentagonal metal column 12 box. The lower end face of the lifting tube assembly 4 is designed with three screw holes in a triangular position. The bottom of the pentagonal metal column 12 box is also designed with three through holes 18 in a triangular position. By passing screws through the through holes 18 and screw holes in sequence, the lower end face of the lifting tube assembly 4 is fastened and locked to the bottom of the pentagonal metal column 12 box, ensuring the firmness of the connection between the lifting tube assembly 4 and the chair leg assembly 2.

[0040] like Figure 6 As shown, optionally, the vacuum braking device includes a connecting rod 19, a suction cup 20, and a crank handle 21. The upper end of the connecting rod 19 is connected to the front foot tube 13, and the lower end is rotatably connected to the suction cup 20. The crank handle 21 is connected to the upper end of the suction cup 20.

[0041] Specifically, there are two connecting rods 19. One end of each connecting rod 19 is connected to one of the two front leg tubes 13, and the other end is used to hang the suction cups 20. When the child chair needs to be moved, a force is applied to the crank handle 21, causing the suction cups 20 to rotate and move their lower ends away from the ground, thus allowing the child chair to be pushed. When the child chair needs to be fixed, a reverse force is applied to the crank handle 21, causing the suction cups 20 to rotate in the opposite direction, causing their lower ends to approach and adhere to the ground, thus fixing the chair leg assembly 2 to the ground and securing the child chair.

[0042] Optionally, the foot pedal assembly 5 is slidably connected to the chair leg assembly 2 in the front-to-back direction.

[0043] Specifically, a footrest assembly 5 is installed in front of the chair leg assembly 2, mainly to solve the problem of children's legs dangling when sitting in the upper position. However, as children grow older, the footrest becomes useless. Therefore, by designing the footrest assembly 5 to slide along the chair leg assembly 2 in the front-to-back direction, the footrest assembly 5 can be moved closer to the chair leg assembly 2 for easy footing by children. Alternatively, the footrest assembly 5 can extend away from the chair leg assembly 2 to serve as a footrest for teenagers, allowing the footrest assembly 5 to function as both a footrest and a footrest.

[0044] In this embodiment, the foot pedal assembly 5 can be slidably connected to the two rear foot tubes 14.

[0045] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A hand-cranked, height-adjustable single-back children's study chair, characterized in that, include: Seat assembly (1); Chair leg assembly (2), the chair leg assembly (2) being located below the chair seat assembly (1); Vacuum brake device (3), which is connected to the chair leg assembly (2); The upper end of the lifting riser assembly (4) is used to connect with the seat assembly (1), and the lower end is connected with the leg assembly (2). Foot pedal assembly (5) is located in front of the chair leg assembly (2).

2. The hand-cranked height-adjustable single-back children's study chair according to claim 1, characterized in that, It also includes a backrest assembly (6), which is configured as a single backrest assembly. The single backrest assembly includes a backrest pad (7), an inner back shell, an outer back shell (8), a locking screw (9), and a backrest upright tube connecting assembly. The backrest pad (7), the inner back shell, and the outer back shell (8) are distributed sequentially from front to back. The backrest pad (7) is connected to the inner back shell, and the outer back shell (8) is connected to the inner back shell through the locking screw (9). The outer back shell (8) is connected to the lifting upright tube assembly (4) through the backrest upright tube connecting assembly.

3. The hand-cranked height-adjustable single-back children's study chair according to claim 2, characterized in that, The chair leg assembly (2) includes a pentagonal metal column (12), a front leg tube (13), a rear leg tube (14), and a chair wheel (15). At least two of the front leg tubes (13) are connected to the front end of the pentagonal metal column (12), and at least two of the rear leg tubes (14) are connected to the rear end of the pentagonal metal column (12). The chair wheel (15) is connected to the front leg tube (13) and the rear leg tube (14).

4. The hand-cranked height-adjustable single-back children's study chair according to claim 3, characterized in that, The chair leg assembly (2) also includes a decorative cover (16), which is connected to the pentagonal metal column (12). The decorative cover (16) has an egg-shaped hole (17). The lower end of the lifting tube assembly (4) obliquely passes through the egg-shaped hole (17) and is connected to the bottom surface of the pentagonal metal column (12). The bottom of the pentagonal metal column (12) has three through holes (18) in triangular positions. The lower end face of the lifting tube assembly (4) is designed with three screw holes in triangular positions. The three through holes (18) correspond one-to-one with the three screw holes.

5. The hand-cranked height-adjustable single-back children's study chair according to claim 3, characterized in that, The vacuum brake device includes a connecting rod (19), a suction cup (20), and a crank handle (21). The upper end of the connecting rod (19) is connected to the front foot tube (13), and the lower end is rotatably connected to the suction cup (20). The crank handle (21) is connected to the upper end of the suction cup (20).

6. The hand-cranked height-adjustable single-back children's study chair according to claim 1, characterized in that, The foot pedal assembly (5) is slidably connected to the chair leg assembly (2) in the front-back direction.

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