Chair with good adaptability

Abstract

The utility model relates to the technical field of student chairs, and particularly discloses a chair with good compatibility, which comprises a chair leg frame, a chair surface frame arranged on the upper side of the chair leg frame in a liftable manner, a chair back frame rotationally connected to the upper side of the rear end of the chair surface frame, a seat cushion fixedly mounted at the chair surface frame, and a height-adjustable back cushion, a waist cushion and a headrest arranged at the chair back frame, the headrest and the waist cushion are respectively positioned on the upper and lower sides of the back cushion. According to the chair disclosed by the utility model, different students or the same student can adaptively adjust the heights of the seat cushion, the back cushion, the waist cushion and the headrest according to different heights and body types in different periods, the adaptability is better, and the sitting comfort is ensured, so that the students can keep correct and healthy sitting postures, and the healthy development of the body is ensured.

Description

TECHNICAL FIELD

[0001] The utility model relates to student chair technical field, concretely relates to a chair with good adaptability. BACKGROUND

[0002] The middle school stage is the stage that the student's body develops fast, in the different periods of the stage, whether it is different student or for specific student, its height body shape has bigger change, and the existing chair of the middle school student is relatively unified, the height of the cushion, the back pad, the waist pad and the headrest cannot be adjusted individually, so that different students or the same student in the different periods of the stage cannot be adjusted according to the height body shape, resulting in that the comfort of the student is not high, and seriously, it can also affect the healthy development of the body. UTILITARY MODEL CONTENT

[0003] The utility model aims at providing a chair with good adaptability to solve the above-mentioned technical problem.

[0004] In order to achieve the above-mentioned purpose, the technical scheme of the utility model is as follows: a chair with good adaptability, comprising a chair leg frame, a chair surface frame which is arranged on the upper side of the chair leg frame in a liftable manner, a chair back frame which is rotatably connected to the upper side of the rear end of the chair surface frame, a cushion which is fixedly installed at the chair surface frame, a back pad, a waist pad and a headrest which are arranged at the chair back frame and have adjustable height, and the headrest and the waist pad are respectively located on the upper and lower sides of the back pad.

[0005] Preferably, the chair back frame comprises a rotating shaft rod which is rotatably connected to the upper side of the rear end of the chair surface frame, and a hollow backrest pipe which is fixedly connected to the upper side of the rotating shaft rod, the rear side of the back pad is provided with a first pipe sleeve assembly which penetrates through the upper and lower sides, the first pipe sleeve assembly is slidably sleeved on the outside of the backrest pipe in an up-down manner, a plurality of stop grooves are arranged on the inner wall of the first pipe sleeve assembly in an up-down manner, and the backrest pipe is provided with a first elastic limiting piece which is in movable limiting cooperation with the stop grooves.

[0006] Preferably, the rear side of the backrest pipe is provided with a screw hole, the rear side of the first pipe sleeve assembly is provided with a long slot hole, and the screw hole and the long slot hole are locked and matched by a screwing piece to realize the fixed installation of the back pad at the chair back frame.

[0007] Preferably, the rear side of the waist pad is provided with a second pipe sleeve assembly which penetrates through the upper and lower sides, and the second pipe sleeve assembly is slidably sleeved on the outside of the backrest pipe in an up-down manner.

[0008] Preferably, the rear side of the headrest extends downwardly and is provided with an inner pipe body, the inner pipe body is slidably inserted into the inside of the backrest pipe on the upper side, and the inner pipe body is provided with a second elastic limiting piece which is in elastic extrusion contact cooperation with the inner wall of the backrest pipe.

[0009] Preferably, the lumbar pad is a curved lumbar pad located in front of the lower side of the back pad, and in a top view, the front side of the lumbar pad is gradually recessed from the left and right sides to the center, and in a left or right view, the front side of the lumbar pad is gradually protruded from the upper and lower sides to the center.

[0010] Preferably, the rear lower part of the headrest is formed with an arc concave surface in the shape of an inverted J, and the arc concave surface is limited in position with the top of the back pad.

[0011] Preferably, the surfaces of the back pad, the lumbar pad and the headrest are provided with a plurality of ventilation holes in a hollowed-out manner.

[0012] Preferably, the left and right sides of the bottom of the seat frame are respectively provided with inner support pipes, the left and right sides of the chair leg frame are respectively provided with outer support pipes, the inner support pipes are inserted into the inner upper sides of the outer support pipes, the bottom of the inner support pipe is fixed with a sliding block, the inner part of the outer support pipe is provided with a screw rod mechanism, and the sliding block is arranged on the screw rod mechanism in an up-down sliding manner.

[0013] Preferably, the screw rod mechanism comprises a fixed seat, a screw rod, and a first conical gear and a second conical gear mounted in the fixed seat and vertically transmitted in cooperation, the first conical gear is communicated with the outside, the second conical gear is fixedly connected with the bottom end of the screw rod, and the sliding block is arranged on the outside of the screw rod in an up-down sliding manner.

[0014] The utility model has the following beneficial effects:

[0015] The utility model discloses a chair back frame, the chair back frame is provided with height -adjustable back pad, lumbar pad and headrest, and the headrest and the lumbar pad are located on the upper and lower sides of the back pad respectively, the chair makes different students or the same student in different periods can be adapted to the height of the seat cushion, the back pad, the lumbar pad and the headrest according to the different height and body shape, and the adaptation degree is better, guarantees the comfort of riding, thereby making the student can keep correct and healthy riding posture, guarantees the healthy development of the body. ACCURACY OF DRAWINGS

[0016] Figure 1 It is the front side view of the embodiment of the utility model.

[0017] Figure 2 It is the rear side view of the embodiment of the utility model.

[0018] Figure 3 It is the left view of the embodiment of the utility model.

[0019] Figure 4 It is the rear view of the embodiment of the utility model.

[0020] Figure 5 It isFigure 4 Cross-sectional view at AA in the middle.

[0021] Figure 6 yes Figure 4 Cross-sectional view at the middle BB.

[0022] Figure 7 It is a structural schematic diagram of a headrest according to an embodiment of the present utility model.

[0023] Figure 8 It is a top view of the waist pad according to an embodiment of the present utility model.

[0024] The accompanying drawings are marked: 1 chair leg frame, 1.1 outer support tube, 2 seat frame, 2.1 inner support tube, 3 chair back frame, 3.1 rotating shaft, 3.2 backrest tube, 4 seat cushion, 5 back cushion, 6 lumbar cushion, 7 headrest, 7.1 arc concave surface, 8 first tube kit, 8.1 gear slot, 9 second tube kit, 10 first elastic limiter, 11 second elastic limiter, 12 screw hole, 13 long slot hole, 14 inner tube body, 15 air vent, 16 slider, 17 fixed seat, 18 first bevel gear, 19 second bevel gear, 20 screw. DETAILED DESCRIPTION

[0025] To further illustrate various embodiments, the present invention is provided with accompanying drawings. These drawings form part of the disclosure of this invention and are primarily used to illustrate the embodiments and, in conjunction with the relevant description in the specification, to explain the operating principles of the embodiments. By referring to these drawings, those skilled in the art will understand other possible implementations and the advantages of this invention. The components in the figures are not drawn to scale, and similar reference numerals are generally used to represent similar components.

[0026] In the description of this utility model, unless otherwise specified, "plurality" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," "front end," "rear end," "head," "tail," etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings and are intended solely to facilitate the description of this utility model and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific direction, be constructed, or operate in a specific direction, and therefore should not be construed as limiting this utility model. Furthermore, the terms "first," "second," "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0027] In the description of the utility model, it is necessary to explain that, unless there is definite stipulation and limitation, the term "connects", "connects" should be broad sense understanding, for example, can be fixed connection, also can be detachable connection, or integrally connects, can be mechanical connection, also can be electrical connection, can be directly connected, also can be indirectly connected through intermediate medium.

[0028] Referring to Figures 1-8 As shown in the utility model, as an embodiment of the utility model, a chair with good adaptability is provided, mainly for middle school students to use, including chair leg frame 1, chair surface frame 2 that can be lifted and set on the upper side of chair leg frame 1, chair back frame 3 that is rotatably connected on the upper side of the rear end of chair surface frame 2, seat cushion 4 is fixedly installed at chair surface frame 2, height-adjustable back pad 5, waist pad 6 and headrest 7 are arranged at chair back frame 3, and headrest 7 and waist pad 6 are located on the upper and lower sides of back pad 5 respectively, that is, the chair of the utility model enables different students or the same student in different periods to adapt to the height of seat cushion 4, back pad 5, waist pad 6 and headrest 7 according to the difference of body shape, and the adaptability is better, the comfort of riding is guaranteed, so that the student can keep correct and healthy riding posture, and the healthy development of the body is guaranteed.

[0029] Of course, in addition to providing use for middle school students, the chair with good adaptability of the utility model can also be applicable to adults, and the specific size can be correspondingly increased and adjusted.

[0030] In the embodiment, chair back frame 3 includes rotating shaft rod 3.1 rotatably connected on the upper side of the rear end of chair surface frame 2 and hollow backrest pipe 3.2 fixedly connected on the upper side of rotating shaft rod 3.1, back pad 5 is provided with first pipe sleeve set 8 penetrating up and down on the rear side, first pipe sleeve set 8 is slidably sleeved on the outside of backrest pipe 3.2 up and down, a plurality of stop grooves 8.1 are arranged on the inner wall of the front side of first pipe sleeve set 8 up and down, first elastic limiting piece 10 is arranged on backrest pipe 3.2, first elastic limiting piece 10 is movably limited and matched with stop groove 8.1, and then back pad 5 is height-adjustably installed on backrest pipe 3.2.

[0031] In the embodiment, the rear side of backrest pipe 3.2 is provided with screw hole 12, the rear side of first pipe sleeve set 8 is provided with long slot hole 13, screw locking piece passes through long slot hole 13 and screw hole 12 to lock and cooperate to realize that back pad 5 is fixedly installed at chair back frame 3, when the height of back pad 5 needs to be adjusted, the screw locking piece is taken out, first pipe sleeve set 8 can be slid up and down along backrest pipe 3.2 again, so that the height of back pad 5 is adjusted again.

[0032] In the embodiment, the rear side of the waist cushion 6 is provided with a second sleeve assembly 9 penetrating up and down, the second sleeve assembly 9 is slidingly sleeved on the outside of the backrest pipe 3.2, and the waist cushion 6 is further installed in front of the backrest pipe 3.2 in a height-adjustable manner.

[0033] In the embodiment, the rear side of the headrest 7 extends downward and is provided with an inner pipe body 14, the inner pipe body 14 is slidingly inserted into the upper side of the inside of the backrest pipe 3.2, and the inner pipe body 14 is provided with a second elastic limiting piece 11, the second elastic limiting piece 11 is in elastic extrusion contact with the inner wall of the backrest pipe 3.2, so that the headrest 7 can be fixed relative to the backrest pipe 3.2 without external force, and the headrest 7 can slide up and down relative to the backrest pipe 3.2 only when external force is applied to the headrest 7. Of course, in order to ensure the stability of the limiting, it is also possible that a groove is arranged on the inner wall of the backrest pipe 3.2 and is in movable limiting cooperation with the second elastic limiting piece 11.

[0034] In the embodiment, the waist cushion 6 is a curved waist cushion 6 located in front of the lower side of the back cushion 5, in the top view, the front side of the waist cushion 6 is gradually recessed from the left and right sides to the center direction, and in the left or right view, the front side of the waist cushion 6 is gradually protruded forward from the upper and lower sides to the center direction, so as to be more in line with ergonomics, so that the waist cushion 6 is more fitted to the waist of the human body, and the use comfort of the user is further improved.

[0035] In the embodiment, the rear side of the headrest 7 is formed with a reverse J-shaped arc concave surface 7.1, and the arc concave surface 7.1 is in limiting cooperation with the top of the back cushion 5.

[0036] In the embodiment, the first elastic limiting piece 10 and the second elastic limiting piece 11 have the same structure principle, which is a structure of spring and elastic ball (or elastic column) connection

[0037] In the embodiment, the surfaces of the back cushion 5, the waist cushion 6 and the headrest 7 are provided with a plurality of ventilation holes 15, so that the chair of the utility model is more light and ventilated, convenient to carry and improve the riding comfort.

[0038] In the embodiment, the left and right sides of the bottom of the seat frame 2 are respectively provided with inner support pipes 2.1, the left and right sides of the seat frame 2 are also provided with armrests, the left and right sides of the leg frame 1 are respectively provided with outer support pipes 1.1, the inner support pipes 2.1 are inserted into the inner upper sides of the outer support pipes 1.1, the bottom of the inner support pipe 2.1 is fixed with a sliding block 16, the inner part of the outer support pipe 1.1 is provided with a screw rod mechanism, and the sliding block 16 is arranged on the screw rod mechanism in an up-down sliding manner. The screw rod mechanism comprises a fixed seat 17, a screw rod 20, and a first conical gear 18 and a second conical gear 19 which are installed in the fixed seat 17 and are vertically transmissionally matched, the first conical gear 18 is externally communicated, the second conical gear 19 is fixedly connected with the bottom end of the screw rod 20, and the sliding block 16 is arranged on the outer side of the screw rod 20 in an up-down sliding manner. When it is necessary to adjust the height of the cushion 4, the first conical gear 18 is rotated by using a hexagonal wrench or the like, thereby driving the second conical gear 19 and the screw rod 20 to rotate, and thereby driving the sliding block 16 to slide up and down, so as to realize the lifting adjustment of the seat frame 2 and the cushion 4.

[0039] Although the utility model is specifically shown and introduced in combination with the preferred embodiments, it should be understood by those skilled in the art that various changes can be made to the utility model in form and details without departing from the spirit and scope of the utility model defined in the appended claims, and all the changes fall within the protection scope of the utility model.

Claims

1. A chair with adaptability, characterized by: The chair back frame includes a rotating shaft rod rotatably connected to the upper side of the rear end of the seat frame and a hollow backrest tube fixedly connected to the upper side of the rotating shaft rod.

2. The chair of claim 1, wherein: The rear side of the backrest is provided with a first sleeve assembly penetrating upward and downward, the first sleeve assembly is slidably sleeved on the outside of the backrest tube upward and downward, a plurality of stop grooves are arranged on the inner wall of the first sleeve assembly upward and downward, the backrest tube is provided with a first elastic limiting piece, and the first elastic limiting piece is in active limiting cooperation with the stop grooves.

3. The chair of claim 2, wherein: The rear side of the backrest tube is provided with a screw hole, the rear side of the first sleeve assembly is provided with a long slot hole, and the first sleeve assembly is fixedly installed at the chair back frame by screw locking through the long slot hole and the screw hole.

4. The chair of claim 2, wherein: The rear side of the waist pad is provided with a second sleeve assembly penetrating upward and downward, and the second sleeve assembly is slidably sleeved on the outside of the backrest tube upward and downward.

5. The chair of claim 2, wherein: The rear side of the headrest extends downward and is provided with an inner tube body, the inner tube body is slidably inserted into the inside of the backrest tube upward, and the inner tube body is provided with a second elastic limiting piece, and the second elastic limiting piece is in elastic extrusion contact cooperation with the inner wall of the backrest tube.

6. The chair of claim 1, wherein: The waist pad is a curved waist pad located in front of the lower side of the backrest, in the top view, the front side of the waist pad is gradually recessed from the left and right sides to the center, and in the left or right view, the front side of the waist pad is gradually protruded forward from the upper and lower sides to the center.

7. The chair of claim 1, wherein: The rear side of the headrest is formed with a reverse J-shaped arc concave surface, and the arc concave surface is in limiting cooperation with the top of the backrest upward and downward.

8. The chair of claim 1, wherein: The surfaces of the backrest, the waist pad and the headrest are provided with a plurality of gas holes.

9. The chair of claim 1, wherein: The left and right sides of the bottom of the seat frame are respectively provided with inner support tubes, the left and right sides of the chair leg frame are respectively provided with outer support tubes, the inner support tubes are inserted into the inside of the outer support tubes upward, the bottom of the inner support tube is fixed with a sliding block, the inside of the outer support tube is provided with a screw rod mechanism, and the sliding block is slidably arranged on the screw rod mechanism upward and downward.

10. The chair of claim 9, wherein: ​

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