Student chair convenient to adjust

Abstract

The utility model provides a student's seat convenient to adjust relates to seat technical field, including underframe and seat surface, seat surface both sides are equipped with first guide slot, the both sides of underframe both sides are equipped with second guide slot, the both sides of underframe inner front end are hinged with first motion bar, the first motion bar is hinged with the second motion bar, the second motion bar is hinged with the second motion bar, and the second motion bar is hinged with the second motion bar. Second movable rods are hinged to the two sides of the front end in the seat surface; the high-low hook is shifted to be separated from the positioning rod, external force is applied to the seat face downwards, the first movable rod and the second movable rod rotate under the sliding of the first movable shaft, the second movable shaft, the first guide groove and the second guide groove, the seat face moves downwards until the seat face makes contact with the bottom frame, the backrest hook is lifted upwards synchronously, and the backrest frame is rotated synchronously. When rotating to the horizontal position, the swing connecting rod is in contact with the ground to support the backrest frame, so that the overall height of the student chair is reduced, the backrest and the seat surface are positioned on the same plane, the usable area is increased, and the application range is expanded.

Description

Technical Field

[0001] The utility model relates to the technical field of seats, in particular to a conveniently adjustable student seat. Background Art

[0002] A chair is a piece of furniture or equipment designed to provide sitting support, with a backrest and some with armrests. There are many types of chairs and they are widely used. Among them, a student chair is a chair designed specifically for students, which aims to provide comfortable sitting and support, and promote students' concentration and healthy development in their studies.

[0003] Student chairs are usually made of comfortable materials, providing appropriate hardness and support. The back support design helps prevent and reduce waist and back problems. Student chairs are usually made of durable materials and are easy to clean and maintain. However, existing student chairs are generally fixed structures with a single purpose and can only provide a sitting function. The seat area is fixed and cannot be adjusted. It can only ensure normal classes and cannot be used for other activities. Therefore, the utility model proposes a student chair that is easy to adjust to solve the problems existing in the prior art. Utility Model Content

[0004] In view of the above problems, the utility model proposes a conveniently adjustable student chair, which can reduce the overall height, place the backrest and the seat surface on the same plane, increase the usable area, and thus expand the scope of application.

[0005] To achieve the purpose of the utility model, the utility model is implemented through the following technical solutions: a conveniently adjustable student chair, comprising a base frame and a seat surface, both sides of the seat surface are provided with a first guide groove, both sides of the base frame are provided with a second guide groove, both sides of the front end of the base frame are hinged with a first movable rod, both sides of the front end of the seat surface are hinged with a second movable rod, the rear end of the first movable rod is provided with a first movable shaft slidably adapted to the first guide groove, the rear end of the second movable rod is provided with a second movable shaft slidably adapted to the second guide groove, both sides of the first movable shaft are elastically provided with high and low hooks, and the first guide groove is provided with a positioning rod adapted to the high and low hooks;

[0006] Backrest frames are hinged on the upper sides of the rear end of the base frame, and vertical rods are hinged on both sides of the rear end of the backrest frames, and swing links are hinged on the lower ends of the two groups of vertical rods. A hinge shaft is connected between the hinges of the vertical rods and the swing links on both sides, and the lower end of the swing link is hinged to the lower side of the rear end of the base frame. A cross bar is provided above the inner rear end of the base frame, and backrest hooks compatible with the hinge shaft are elastically provided on both sides of the cross bar.

[0007] A further improvement is that telescopic gas rods are rotatably provided on both sides of the crossbar, connecting pieces are provided on both sides of the rear end of the bottom of the seat surface, and the output ends of the telescopic gas rods on both sides are respectively hinged to the connecting pieces on both sides.

[0008] A further improvement is that rollers are provided on both sides of the first movable shaft and the second movable shaft, the first movable shaft is slidably adapted to the first guide groove through the rollers, and the second movable shaft is slidably adapted to the second guide groove through the rollers.

[0009] A further improvement is that: fixing washers are provided on both sides of the positioning rod, and the fixing washers are fixed to the seat surface by bolts.

[0010] A further improvement is that both sides of the front end of the backrest frame are provided with slide rails, and a backrest is movably mounted on the slide rails.

[0011] A further improvement is that fastening bolts are provided above the rear ends of the slide rails on both sides, and the fastening bolts are used to fix the backrest.

[0012] A further improvement is that the height hook is elastically rotatably mounted on the first movable shaft via a torsion spring, and the backrest hook is elastically rotatably mounted on the cross bar via a torsion spring reset member.

[0013] The beneficial effects of the utility model are:

[0014] 1. The utility model moves the height hook to disengage the positioning rod and applies an external force downward to the seat surface. Under the sliding of the first movable shaft, the second movable shaft and the first guide groove and the second guide groove, the first movable rod and the second movable rod rotate, and the seat surface moves downward until it contacts the base frame, and the backrest hook is lifted upward synchronously, and the backrest frame is rotated. When it is turned to a horizontal position, the swing connecting rod contacts the ground to support the backrest frame. As a result, the overall height of the student chair is reduced, the backrest and the seat surface are in the same plane, the use area is increased, and the scope of application is expanded.

[0015] 2. The utility model can adjust the position of the positioning rod and tighten it through a fixing gasket. By hooking the positioning rods in different positions through high and low hooks, the height of the seat surface can be adjusted and fixed. It is convenient to adjust the height according to the height of the students so that the students' eyes can maintain a certain distance from the desk seat surface to protect the students' eyesight.

[0016] 3. The backrest on the backrest frame of the utility model can be changed in position by means of a slide rail and fixed by means of fastening bolts, so as to be suitable for students of different heights to lean on. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is the front view of the utility model;

[0018] Figure 2It is a schematic diagram of the back of the utility model;

[0019] Figure 3 It is a flat schematic diagram of the utility model;

[0020] Figure 4 This is a schematic diagram of the high and low hooks adapted to the positioning rod of the utility model;

[0021] Figure 5 It is a schematic diagram of the backrest hook adapting to the hinge shaft of the utility model.

[0022] Among them: 1. base frame; 2. seat surface; 3. first guide groove; 4. second guide groove; 5. first movable rod; 6. second movable rod; 7. first movable axis; 8. second movable axis; 9. high and low hook; 10. positioning rod; 11. backrest frame; 12. vertical rod; 13. swing connecting rod; 14. hinge axis; 15. cross bar; 16. backrest hook; 17. telescopic gas rod; 18. connecting piece; 19. roller; 20. fixing gasket; 21. slide rail; 22. backrest; 23. fastening bolt; 24. torsion spring reset piece. DETAILED DESCRIPTION

[0023] In order to deepen the understanding of the present invention, the present invention will be further described in detail below in conjunction with an embodiment. The embodiment is only used to explain the present invention and does not constitute a limitation on the protection scope of the present invention.

[0024] Embodiment 1

[0025] according to Figure 1 , 2 As shown in Figures 3, 4 and 5, the present embodiment proposes a conveniently adjustable student chair, comprising a base frame 1 and a seat surface 2, wherein first guide grooves 3 are provided on both sides of the interior of the seat surface 2, second guide grooves 4 are provided on both sides of the interior of the base frame 1, first movable rods 5 are hinged on both sides of the front end of the interior of the base frame 1, second movable rods 6 are hinged on both sides of the front end of the interior of the seat surface 2, a first movable shaft 7 slidably matched with the first guide groove 3 is provided at the rear end of the first movable rod 5, a second movable shaft 8 slidably matched with the second guide groove 4 is provided at the rear end of the second movable rod 6, high and low hooks 9 are elastically provided on both sides of the first movable shaft 7, and a positioning rod 10 matched with the high and low hooks 9 is provided inside the first guide groove 3;

[0026] A backrest frame 11 is hinged on the upper part of both sides of the rear end of the base frame 1, and a vertical rod 12 is hinged on both sides of the rear end of the backrest frame 11, and a swing link 13 is hinged on the lower end of the two groups of vertical rods 12. A hinge shaft 14 is connected between the hinges of the vertical rods 12 and the swing link 13 on both sides, and the lower end of the swing link 13 is hinged to the lower part of the rear end of the base frame 1. A cross bar 15 is provided above the inner rear end of the base frame 1, and backrest hooks 16 compatible with the hinge shaft 14 are elastically provided on both sides of the cross bar 15. When in use, the height hook 9 is moved to disengage the positioning rod 10, and an external force is applied downward to the seat surface 2. Under the sliding of the first movable shaft 7, the second movable shaft 8 and the first guide groove 3, the second guide groove 4, the first movable rod 5 and the second movable rod 6 rotate, and the seat surface 2 moves downward until it contacts the bottom frame 1, and the backrest hook 16 is lifted upward synchronously, and the backrest frame 11 is rotated. When it is turned to a horizontal position, the swing connecting rod 13 contacts the ground to support the backrest frame 11, thereby reducing the overall height of the student chair, and the backrest 22 is at the seat surface 2. On the same plane, the use area is increased, thereby expanding the scope of application. When resetting, lift the backrest frame 11 and move it to the position of the hinge shaft 14 at the backrest hook 16. The hinge shaft 14 overcomes the elastic force of the torsion spring on the backrest hook 16 and enters the groove of the backrest hook 16 and locks it, applying an upward external force to the seat surface 2. When the telescopic gas rod 17 passes the horizontal critical position, it automatically moves upward. When the first movable shaft 7 moves to the positioning rod 10, the high and low hooks 9 are matched with the positioning rod 10 under the action of the torsion spring elastic force to fix the seat surface 2.

[0027] Telescopic gas rods 17 are rotatably provided on both sides of the crossbar 15, and connectors 18 are provided on both sides of the rear end of the bottom of the seat 2, and the output ends of the telescopic gas rods 17 on both sides are respectively hinged with the connectors 18 on both sides. Pull the high and low hooks 9, and at the same time, apply external force downward to the seat 2, and the seat 2 moves downward to overcome the supporting force of the telescopic gas rods 17. When the seat 2 moves to a position where the telescopic gas rods 17 are below the horizontal position, the seat 2 automatically moves downward under the supporting force of the telescopic gas rods 17 until it contacts the bottom frame 1 and stops. When resetting, an upward external force is applied to the seat 2, and the telescopic gas rods 17 automatically move upward when passing the horizontal critical position. When the first movable shaft 7 moves to the positioning rod 10, the high and low hooks 9 match the positioning rod 10 under the elastic force of the torsion spring to fix the seat 2.

[0028] Rollers 19 are provided on both sides of the first movable shaft 7 and the second movable shaft 8. The first movable shaft 7 is slidably adapted to the first guide groove 3 through the rollers 19, and the second movable shaft 8 is slidably adapted to the second guide groove 4 through the rollers 19. The first movable shaft 7 and the second movable shaft 8 move in the first guide groove 3 and the second guide groove 4 through the rollers 19, and an external force is applied downward to the seat surface 2. Under the sliding of the first movable shaft 7 and the second movable shaft 8 and the first guide groove 3 and the second guide groove 4, the first movable rod 5 and the second movable rod 6 rotate, and the seat surface 2 moves downward until it contacts the bottom frame 1; when an upward external force is applied to the seat surface 2, when the first movable shaft 7 moves to the positioning rod 10 through the rollers 19, the high and low hooks 9 match the positioning rod 10 under the action of the torsion spring elastic force to fix the seat surface 2.

[0029] The high-low hook 9 is elastically rotatably mounted with the first movable shaft 7 through a torsion spring, and the backrest hook 16 is elastically rotatably mounted with the crossbar 15 through a torsion spring reset member 24. When resetting, the backrest frame 11 is lifted and moved until the hinge shaft 14 is at the position of the backrest hook 16. The hinge shaft 14 overcomes the elastic force of the torsion spring reset member 24 on the backrest hook 16 and enters the groove of the backrest hook 16 and is locked, applying an upward external force to the seat surface 2. When the telescopic gas rod 17 passes through the horizontal critical position, it automatically moves upward. When the first movable shaft 7 moves to the positioning rod 10, the high-low hook 9, under the action of the torsion spring elastic force, matches the positioning rod 10 to fix the seat surface 2.

[0030] Embodiment 2

[0031] according to Figure 1 , 2 As shown in Figures 3, 4 and 5, the present embodiment proposes a conveniently adjustable student chair, comprising a base frame 1 and a seat surface 2, wherein first guide grooves 3 are provided on both sides of the interior of the seat surface 2, second guide grooves 4 are provided on both sides of the interior of the base frame 1, first movable rods 5 are hinged on both sides of the front end of the interior of the base frame 1, second movable rods 6 are hinged on both sides of the front end of the interior of the seat surface 2, a first movable shaft 7 slidably matched with the first guide groove 3 is provided at the rear end of the first movable rod 5, a second movable shaft 8 slidably matched with the second guide groove 4 is provided at the rear end of the second movable rod 6, high and low hooks 9 are elastically provided on both sides of the first movable shaft 7, and a positioning rod 10 matched with the high and low hooks 9 is provided inside the first guide groove 3;

[0032] A backrest frame 11 is hinged on the upper part of both sides of the rear end of the base frame 1, and a vertical rod 12 is hinged on both sides of the rear end of the backrest frame 11, and a swing link 13 is hinged on the lower end of the two groups of vertical rods 12. A hinge shaft 14 is connected between the hinges of the vertical rods 12 and the swing link 13 on both sides, and the lower end of the swing link 13 is hinged to the lower part of the rear end of the base frame 1. A cross bar 15 is provided above the inner rear end of the base frame 1, and backrest hooks 16 compatible with the hinge shaft 14 are elastically provided on both sides of the cross bar 15. When in use, the height hook 9 is moved to disengage the positioning rod 10, and an external force is applied downward to the seat surface 2. Under the sliding of the first movable shaft 7, the second movable shaft 8 and the first guide groove 3, the second guide groove 4, the first movable rod 5 and the second movable rod 6 rotate, and the seat surface 2 moves downward until it contacts the bottom frame 1, and the backrest hook 16 is lifted upward synchronously, and the backrest frame 11 is rotated. When it is turned to a horizontal position, the swing connecting rod 13 contacts the ground to support the backrest frame 11, thereby reducing the overall height of the student chair, and the backrest 22 is at the seat surface 2. On the same plane, the use area is increased, thereby expanding the scope of application. When resetting, lift the backrest frame 11 and move it to the position of the hinge shaft 14 at the backrest hook 16. The hinge shaft 14 overcomes the elastic force of the torsion spring on the backrest hook 16 and enters the groove of the backrest hook 16 and locks it, applying an upward external force to the seat surface 2. When the telescopic gas rod 17 passes the horizontal critical position, it automatically moves upward. When the first movable shaft 7 moves to the positioning rod 10, the high and low hooks 9 are matched with the positioning rod 10 under the action of the torsion spring elastic force to fix the seat surface 2.

[0033] Both sides of the positioning rod 10 are provided with fixing pads 20, and the fixing pads 20 are fixed to the seat surface 2 by bolts. According to the height of the students, the position of the positioning rod 10 is adjusted and tightened to keep a certain distance between the students' eyes and the desk seat surface to protect the students' eyesight.

[0034] Both sides of the front end of the backrest frame 11 are provided with slide rails 21, and a backrest 22 is movably mounted on the slide rails 21. Fastening bolts 23 are provided above the rear ends of the slide rails 21 on both sides, and the fastening bolts 23 are used to fix the backrest 22. The backrest on the backrest frame 11 can be changed in position by the slide rails 21 and fixed by the fastening bolts 23, so that it is convenient for students of different heights to lean on.

[0035] The high-low hook 9 is elastically rotatably mounted with the first movable shaft 7 through a torsion spring, and the backrest hook 16 is elastically rotatably mounted with the crossbar 15 through a torsion spring reset member 24. When resetting, the backrest frame 11 is lifted and moved until the hinge shaft 14 is at the position of the backrest hook 16. The hinge shaft 14 overcomes the elastic force of the torsion spring reset member 24 on the backrest hook 16 and enters the groove of the backrest hook 16 and is locked, applying an upward external force to the seat surface 2. When the telescopic gas rod 17 passes through the horizontal critical position, it automatically moves upward. When the first movable shaft 7 moves to the positioning rod 10, the high-low hook 9, under the action of the torsion spring elastic force, matches the positioning rod 10 to fix the seat surface 2.

[0036] The conveniently adjustable student chair is disengaged from the positioning rod 10 by toggling the height hook 9, and at the same time, an external force is applied downward to the seat surface 2. Under the sliding of the first movable shaft 7, the second movable shaft 8 and the first guide groove 3, the second guide groove 4, the first movable rod 5, the second movable rod 6 rotate, and the seat surface 2 moves downward until it contacts the base frame 1, and the backrest hook 16 is lifted upward synchronously, and the backrest frame 11 is rotated. When it is turned to the horizontal position, the swing link 13 contacts the ground to support the backrest frame 11, thereby, the overall height of the student chair is reduced, the backrest 22 and the seat surface 2 are in the same plane, and the use area is increased, thereby expanding the scope of application, for example, the student can lie completely flat during lunch break. The position of the positioning rod 10 can be adjusted and fixed by the fixing gasket 20. The height of the seat surface 2 can be adjusted and fixed by hooking the positioning rod 10 at different positions by the height hook 9, so that the height can be adjusted according to the height of the student, so that the student's eyes are kept at a certain distance from the desk seat surface to protect the student's eyesight. At the same time, the backrest on the backrest frame 11 can be changed in position by means of the slide rail 21 and fixed by means of the fastening bolts 23, so as to be adapted to the backrest of students of different heights.

[0037] The above shows and describes the basic principles, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principles of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. A conveniently adjustable student chair, comprising a base frame (1) and a seat surface (2), characterized in that: Both sides of the seat surface (2) are provided with a first guide groove (3), both sides of the base frame (1) are provided with a second guide groove (4), both sides of the front end of the base frame (1) are hinged with a first movable rod (5), both sides of the front end of the seat surface (2) are hinged with a second movable rod (6), the rear end of the first movable rod (5) is provided with a first movable shaft (7) slidably matched with the first guide groove (3), the rear end of the second movable rod (6) is provided with a second movable shaft (8) slidably matched with the second guide groove (4), both sides of the first movable shaft (7) are elastically provided with high and low hooks (9), and the first guide groove (3) is provided with a positioning rod (10) matched with the high and low hooks (9); A backrest frame (11) is hingedly connected to the upper part of both sides of the rear end of the base frame (1), and vertical rods (12) are hingedly connected to both sides of the rear end of the backrest frame (11). The lower ends of the two groups of vertical rods (12) are hingedly connected to swing links (13). A hinge shaft (14) is connected between the hinges of the vertical rods (12) and the swing links (13) on both sides. The lower end of the swing link (13) is hingedly connected to the lower part of the rear end of the base frame (1). A cross bar (15) is provided above the inner rear end of the base frame (1), and backrest hooks (16) adapted to the hinge shaft (14) are elastically provided on both sides of the cross bar (15).

2. The conveniently adjustable student chair according to claim 1, characterized in that: Telescopic gas rods (17) are rotatably provided on both sides of the cross bar (15), and connecting pieces (18) are provided on both sides of the rear end of the bottom of the seat surface (2), and the output ends of the telescopic gas rods (17) on both sides are respectively hinged to the connecting pieces (18) on both sides.

3. The conveniently adjustable student chair according to claim 1, characterized in that: Rollers (19) are provided on both sides of the first movable shaft (7) and the second movable shaft (8); the first movable shaft (7) is slidably fitted with the first guide groove (3) via the rollers (19); and the second movable shaft (8) is slidably fitted with the second guide groove (4) via the rollers (19).

4. The conveniently adjustable student chair according to claim 1, characterized in that: Both sides of the positioning rod (10) are provided with fixing washers (20), and the fixing washers (20) are fixed to the seat surface (2) by means of bolts.

5. The conveniently adjustable student chair according to claim 1, characterized in that: Slide rails (21) are provided on both sides of the front end of the backrest frame (11), and a backrest (22) is movably mounted on the slide rails (21).

6. The conveniently adjustable student chair according to claim 5, characterized in that: A fastening bolt (23) is provided above the rear end of the slide rails (21) on both sides, and the fastening bolt (23) is used to fix the backrest (22).

7. The conveniently adjustable student chair according to claim 1, characterized in that: The height hook (9) is elastically rotatably mounted on the first movable shaft (7) via a torsion spring, and the backrest hook (16) is elastically rotatably mounted on the crossbar (15) via a torsion spring reset member (24).

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