CN114947386B

CN114947386B - Student desks and chairs

Info

Publication number: CN114947386B
Application number: CN202210557090.9A
Authority: CN
Inventors: 钟宇翔
Original assignee: Shenzhen Yuxiang Space Technology Co ltd
Current assignee: Shenzhen Yuxiang Space Technology Co ltd
Priority date: 2022-05-20
Filing date: 2022-05-20
Publication date: 2024-12-03
Anticipated expiration: 2042-05-20
Also published as: CN114947386A

Abstract

The present invention discloses a student desk and chair, comprising: a desk, wherein the desk comprises a book bucket, wherein the book bucket comprises an inclined top plate, wherein the book bucket comprises a storage cavity, wherein the storage cavity comprises an opening and a back portion opposite to the opening, wherein the top plate is inclined downward from one end provided at the opening to one end provided at the back portion; and a chair, wherein the chair comprises a seat plate, a backrest plate and a leg support plate, wherein the angle between the backrest plate and the seat plate is adjustable, wherein the leg support plate and the seat plate are movably connected via a guide assembly, wherein the guide assembly is used to guide the leg support plate to move and be stored under the seat plate. Compared with the prior art, during lunch break, the students in the present application only need to make three-step adjustments to take a lunch break, and neither the desk and chair need to be moved, nor multiple desks and chairs need to be adjusted substantially, which can well solve the problem of students having difficulty taking a lunch break. At the same time, the desk and chair make little noise during the change process, and do not affect the rest of other students.

Description

Desk and chair for students

Technical Field

The invention relates to the field of teaching aids, in particular to a student desk and chair.

Background

When students in noon break, students can only lie on a desktop by hands, the students can rest on arms to noon break, the arms are pressed, cervical muscles are stretched for a long time, the back is twisted, frequent hand tingling is finished after noon break, and the back of part of the students is in an odd shape, so that the health of the students is greatly influenced.

The existing noon break desk and chair on the market solves the noon break problem of partial people, the desk and chair are changed from a class mode to a noon break mode, the desk and chair are required to be greatly adjusted, time is long, the changing process is complex, operation noise is greatly changed during the period, and the rest of other people is easily affected.

Disclosure of Invention

The invention provides a student desk and chair, which solves the technical problems of complicated steps and large occupied space when the student desk and chair is switched to a noon break mode in the prior art.

In order to solve the technical problems, the technical scheme includes that the desk comprises a book hopper, the book hopper comprises a top plate which is obliquely arranged, the book hopper comprises a storage cavity, the storage cavity comprises an opening and a back opposite to the opening, the top plate is downwards inclined from one end of the opening to one end of the back, the tablet chair comprises a seat plate, a backup plate and a leg supporting plate, an included angle between the backup plate and the seat plate is adjustable, the leg supporting plate is movably connected with the seat plate through a guide assembly, and the guide assembly is used for guiding the leg supporting plate to be movably contained below the seat plate.

Further, the desk also comprises a panel, wherein the panel is arranged above the book hopper, and the panel is connected with the book hopper in a turnover way.

Further, the desk also comprises a turnover mechanism, the turnover mechanism comprises a locking structure, the locking structure comprises a lock rod, one end of the lock rod is rotationally connected with the panel, the other end of the lock rod is in sliding connection with the book hopper, and the book hopper also comprises a clamping groove which is arranged on the desk body and used for clamping and positioning the lock rod.

Further, the top plate is provided with a groove, the groove is matched with the shape of the head of the human body, and the groove is provided with ventilation holes.

Further, the turnover mechanism further comprises an elastic buffer structure, and two ends of the elastic buffer structure are respectively connected with the panel and the book hopper in a rotating mode.

Further, the tablet chair further comprises an adjusting mechanism, wherein the adjusting mechanism comprises a first baffle body and a locking piece, the first baffle body is arranged on the backup plate rotating path and used for being abutted against the backup plate, the locking piece is movably arranged between the backup plate and the first baffle body, the locking piece moves onto the backup plate rotating path to be abutted against the backup plate, and the locking piece moves out of the backup plate rotating path to be separated from the backup plate to be abutted against.

The locking piece comprises a pair of upper connecting plates, a control rod, an elastic reset piece and a locking piece, wherein the upper connecting plates comprise a first mounting part, a second mounting part and a supporting part, the first mounting part is hinged with the seat plate, the supporting part is in supporting connection with the backup plate, the control rod is connected between the two upper connecting plates, one end of the upper connecting plates, which is far away from the control rod, is a supporting end which is in supporting connection with the seat plate, the distance between the supporting end and the first mounting part is larger than the distance between the first mounting part and the seat plate, the elastic reset piece is connected between the second mounting part and the seat plate, the first mounting part is arranged at one end, which is far away from the control rod, and the second mounting part is arranged between the first mounting part and the supporting part.

Further, the backup plate comprises a rotating shaft and a butt joint, the rotating shaft is horizontal, the butt joint is arranged below the rotating shaft and used for butt joint of the butt joint part and the first gear, the seat plate comprises a support frame, a second gear and the first gear are arranged on the support frame and used for butt joint with the butt joint, the first gear and the second gear are respectively arranged on two sides of the butt joint, and the butt joint swings between the first gear and the second gear.

Further, the guide component comprises a guide piece, the guide piece is a pair of guide rail, the leg layer board is equipped with the slider, the leg layer board with the slider rotates to be connected, and is located leg layer board both sides the coaxial setting of slider, the slider is located on the guide rail, the both ends of guide rail are equipped with the stopper, the stopper can with slider butt, the slider is two slide between the stopper, the draw-in groove has been seted up to the stopper, the leg layer board is equipped with the lug, the lug is located in the draw-in groove, just the draw-in groove is on a parallel with guide rail length direction's both ends are equipped with the confession the bayonet socket that the lug slides and passes.

Further, the height of desk and tablet chair is adjustable, just student tablet chair still includes detachably setting up head support subassembly on the backup plate, head support subassembly includes head layer board and telescopic link, the telescopic link connect in between backup plate and the head layer board, the telescopic link is used for adjusting distance between backup plate and the head layer board.

Compared with the prior art, the application has the beneficial effects that when students need noon break, the students only need to turn the panel to the vertical state, the top plate of the book hopper is exposed, the operating rod is pressed downwards at the same time, the leaning plate is pressed lightly, the leaning plate and the seat plate are adjusted to be in a 150-DEG near lying flat state, the heads of the students are rested on the top plate, and the students can noon break by placing the legs on the leg supporting plates. In general, the students can have noon break only by three-step adjustment, so that the students do not need to move desks and chairs or greatly adjust the desks and chairs, the problem of noon break of the students can be well solved, and meanwhile, the desks and chairs have low noise in the changing process and do not influence rest of other students.

In addition, the application has the following advantages:

1. the distance between the front and the back of the desk is only 90CM, 45-48 desk and chairs can be placed in an existing standard classroom, the desk and chair is suitable for the actual conditions of the current school, students with the height of 1.2-2.0 m can be used in the desk and chair for noon break, the chair can bear 150KG weight for noon break, the chair plate is widened, hands of the students can be placed on two sides during noon break, and the students are more comfortable in noon break.

2. The noon body desk and chair is specially designed to be breathable, and the breathable holes are formed in the seat plate, the leaning plate, the leg supporting plates and the head supporting plates, so that the problem of ventilation of the noon body in hot summer is solved.

3. The desk and chair of the application adopts an optimized modularized design, and the lower half part is less in shielding, thereby being convenient for students to clean.

Drawings

FIG. 1 is a schematic view of the structure of a desk and a chair according to the present invention.

Fig. 2 is a schematic perspective view of an open side of the desk in the first embodiment.

Fig. 3 is a schematic perspective view of an open side of a desk in a second embodiment.

Fig. 4 is a schematic perspective view of the back side of the desk in a second embodiment.

Fig. 5 is an enlarged schematic view of the structure of fig. 1a.

Fig. 6 is a schematic view of a part of the structure of the first embodiment of the desk.

Fig. 7 is a schematic structural view of a turnover mechanism in the first embodiment of the desk.

Fig. 8 is a schematic perspective view of a chair according to the present invention.

Fig. 9 is a schematic view of the seat plate in the first embodiment of the tablet chair.

Fig. 10 is a schematic view of the structure of the supporting frame in the first embodiment of the tablet chair.

Fig. 11 is a schematic view of the structure of the locking member in the first embodiment of the tablet chair.

Fig. 12 is a schematic view showing the connection structure of the locking member and the seat plate in the first embodiment of the tablet chair.

Fig. 13 is a schematic view of the structure of the back side direction of the back plate in the first embodiment of the chair.

Fig. 14 is a schematic view of the structure of the chair in the lesson mode according to the present invention.

Fig. 15 is a schematic view of the structure of the chair in noon break mode according to the present invention.

Fig. 16 is a schematic view of the structure of the second embodiment of the back plate adjusting mechanism in the lesson mode.

Fig. 17 is a schematic structural view of the second embodiment of the back plate adjusting mechanism in the noon break mode.

Fig. 18 is a schematic view of an exploded construction of a second embodiment of the back plate adjustment mechanism.

Fig. 19 is a schematic view of a mounting structure of the backup plate to the head pallet.

Fig. 20 is a schematic view of the telescopic structure of the head rest.

Fig. 21 is a schematic perspective view of a leg rest according to the present invention.

Fig. 22 is a schematic view showing a structure of the present invention in a state where the leg rest is housed.

Fig. 23 is a schematic side view of a leg rest according to the present invention.

Fig. 24 is a schematic view of an exploded construction of a leg rest according to the present invention.

FIG. 25 is a schematic view of the mounting structure of the stopper and the guide member according to the present invention.

Fig. 26 is a schematic view showing the combined structure of the second embodiment of the desk and the second embodiment of the chair according to the present invention (leg rest not shown).

The fingers in fig. 14 and 15 are only schematic for the direction of the force applied by the back plate during rotation adjustment, and are not part of the back plate adjusting mechanism.

Detailed Description

The application provides a student desk and chair, as shown in fig. 1 and 26, wherein the desk and chair comprises a desk and a chair, and the desk and the chair are arranged in an adjustable structure for noon break of students.

Referring to fig. 1 to 7, the desk mainly includes a book block 1a, a panel and legs 10a, the book block has a storage cavity 11a, the storage cavity 11a is used for storing student articles, one side of the storage cavity 11a has an opening, the side of the storage cavity 11a opposite to the opening is the back of the storage cavity 11a, in the first embodiment of the book block 1a, the storage cavity 11a further includes a top plate 13a, the top plate 13a is obliquely arranged at the top of the storage cavity 11a, the top plate 13a is downwardly inclined from one end at the opening to one end at the back, and students on the side of the lower level of the top plate 13a can lean against the book block 1a and adjust the position of the desk and chair to lie on the top plate 13a for rest. The book block 1a further comprises a bottom plate 15a, and the bottom plate 15a is inclined downwards from one end of the opening to one end of the back, so that the bottom of the storage cavity 11a has a certain inclination to prevent articles from sliding down.

Further, as shown in fig. 3 and 4, in the second embodiment of the desk, a groove 131a is provided on the outer surface of the top plate 13a, the groove 131a is matched with the shape of the head of the human body, and according to the design of human body engineering, the groove 131a is designed to be matched with the head, so as to meet the noon break requirement of the student, and make the student feel more comfortable, and a layer of flexible pad, such as silica gel, can be provided on the surface of the groove 131a, so that the comfort of the student at rest can be greatly improved. In addition, the grooves 131a can be provided with air holes, and the arrangement of the air holes can improve the heat dissipation effect and avoid the problem of sweating in noon break of students.

The application further provides a novel student desk, referring to fig. 5, the novel desk mainly comprises a book hopper 1a, a panel 2a and desk legs 10a, wherein the desk legs 10a are arranged below the book hopper 1a, the desk legs 10a play a role in supporting the book hopper 1a, the panel 2a is horizontally arranged above the book hopper 1a, the panel 2a is in overturning connection with the book hopper 1a, when the panel 2a is horizontally arranged, the novel desk can be used for students to write and read textbooks, and when the panel 2a is overturned to be in a vertical state, a top plate 13a of the book hopper 1a is exposed, and students can have noon break.

Specifically, the opening of the storage cavity 11a of the book hopper 1a is opposite to students, the top plate 13a is inclined downwards from one side of the opening of the storage cavity 11a to the back, the storage cavity 11a is arranged to be more visual and is convenient for the students to place and take textbooks, the panel 2a is rotationally connected with one side of the opening of the book hopper 1a, namely the panel 2a is turned over and opened towards the opening of the storage cavity 11a, after the panel 2a is opened, the top plate 13a of the book hopper 1a is exposed, and the students positioned at the back of the desk can lie on the top plate 13a obliquely for noon break.

Referring to fig. 6, the student desk further comprises a desk leg 10a, wherein the height of the desk leg 10a is adjustable, specifically, the desk leg 10a comprises a supporting seat 101a and a supporting rib 102a, the supporting seat 101a comprises a vertical upright rod 1011a and a horizontal cross rod 1012a which are arranged horizontally, the upright rod 1011a and the cross rod 1012a are connected to form an L-shaped structure, two supporting rods are oppositely arranged and are fixedly connected by one connecting rod 1013a, the upright rod 1011a is arranged into a hollow pipe body, the upper end part of the upright rod 1011a is provided with a mounting hole 72a, the supporting leg is inserted into the upright rod 1011a from the mounting hole 72a, the upright rod 1011a is correspondingly provided with a positioning hole, the supporting leg is correspondingly provided with a plurality of threaded holes, the threaded holes are uniformly arranged along the length direction of the supporting leg, one threaded hole is adjusted to the position opposite to the positioning hole, and a bolt is used for screwing the relative position of the upright rod 1011a and the supporting leg into the threaded hole, when the height of the desk is adjusted, the supporting leg is only required to be stretched to the preset position, and then fixed by the bolt.

Furthermore, the student desk further comprises a set of turnover mechanism, the book hopper 1a comprises side plates respectively arranged at two sides of the opening, the side plates comprise extension plates 141a arranged above the storage cavity 11a, the upper ends of the extension plates 141a are horizontal, the panel 2a is abutted against the upper ends of the extension plates 141a so as to ensure the horizontal placement of the panel 2a, and the turnover mechanism is arranged on the extension plates 141a, specifically, the turnover mechanism mainly comprises a locking structure 3a and an elastic buffer structure 8a, the positioning of the panel 2a after the turnover opening can be realized through the locking structure 3a, the panel 2a is turned over and fixed, the elastic buffer structure 8a is mainly used for resisting the traction force received by the panel 2a when the panel 2a is turned over and opened or the gravity received by the panel 2a when the panel 2a is covered, and the elastic buffer structure 3a counteracts the forces, so that severe collision generated when the panel cover is turned over or closed is avoided, the noise can be reduced, and the service life of the desk can be prolonged.

Specifically, as shown in fig. 5, 6 and 7, the locking structure 3a mainly includes a lock rod 4a, one end of the lock rod 4a is rotationally connected with the panel 2a, specifically, a hinged manner is adopted to rotationally connect, the other end of the lock rod 4a is slidably connected with the hopper 1a, when the panel 2a is turned over and opened, the lock rod 4a is forced to slide on the hopper 1a, in the application, a sliding chute 7a is arranged on the hopper 1a, the length direction of the sliding chute 7a is the sliding direction of the end of the lock rod 4a, the locking structure 3a further includes a sliding block 5a, the sliding block 5a is cylindrical, the lock rod 4a is arranged on one side of the sliding block 5a in the axial direction, and a chuck 6a is also arranged on the other side of the sliding block 5a relative to the lock rod 4a, and the chuck 6a is clamped on one side of the sliding chute 7a, so that the sliding block 5a is dead limited in the sliding chute 7a, and the sliding block 5a is prevented from being separated from the sliding chute 7a, and the sliding block 5a can always slide in the sliding chute 7 a; the draw-in groove 71a locates in the direction of gravity of slider 5a, and when slider 5a slided to the extreme position of spout 7a, slider 5a can fall into draw-in groove 71a by its gravity voluntarily, draw-in groove 71a and slider 5a joint cooperation to fixed locking lever 4 a's position can fix a position panel 2a, when the unblock, the manual locking lever 4a that lifts up can, with this degree of difficulty that reduces locking lever 4a and draw-in groove 71a joint, avoid the inaccurate problem of joint.

Further, in assembling the slide 5a and the slide groove 7a of the lock lever 4a, the chuck 6a and the slide 5a may be assembled by fitting the slide 5a into the slide groove 7a and fixing the chuck 6a and the slide 5 a. The application provides another preferable installation mode, the other end of the chute 7a opposite to the clamping groove 71a is provided with an installation opening 72a, the chuck 6a can freely pass through the installation opening 72a, the slide block 5a and the chuck 6a are integrally arranged, one side of the chuck 6a of the slide block 5a is directly assembled from the installation opening 72a, the installation opening 72a is arranged in the direction opposite to the gravity direction of the chuck 6a, the problem that the assembly failure of the slide block 5a and the chute 7a is caused by the automatic falling of the chuck 6a into the installation opening 72a is avoided, and compared with other modes, the assembly mode is simpler and more convenient.

Further, the two ends of the elastic buffer structure 8a are respectively fixed on the panel 2a and the book hopper 1a, and the two ends of the elastic buffer structure 8a are rotationally connected with the panel 2a and the book hopper 1a in a hinged connection mode, the elastic buffer structure 8a has elasticity, can exert damping effect on overturning and opening of the face cover, prevent the panel 2a from being quickly closed, avoid hurting people, and reduce noise.

Preferably, the elastic buffer structure 8a is a gas spring.

Furthermore, the turnover mechanism further comprises an adapter plate 9a, the adapter plate 9a is detachably mounted on the panel 2a through bolts, the elastic buffer structure 8a, the lock rod 4a and the book hopper 1a are rotationally connected with the panel 2a through the adapter plate 9a, the structural requirements of the panel 2a can be greatly reduced through the arrangement of the adapter plate 9a, the mounting procedures of the panel 2a and the turnover mechanism are reduced, batch production and assembly are facilitated, meanwhile, the damage to the structure of the panel 2a is reduced to the minimum, the panel 2a is convenient to recycle, the buffer structure, the lock rod 4a and the book hopper 1a are fixed with the adapter plate 9a in a hinged mode, and the rotation central axes of the buffer structure, the lock rod 4a and the book hopper 1a are kept parallel, so that the slow turnover and locking effect of the panel 2a can be realized.

It can be understood that the turnover mechanism in the application not only comprises a set of locking structure 3a and elastic buffer structure 8a, but also ensures that the panel 2a is uniformly stressed during turnover, and the optimal setting mode is to set a set of locking structure 3a and elastic buffer structure 8a on two opposite sides of the panel 2a respectively so as to achieve the optimal turnover effect.

Preferably, the application is also provided with a binding on one side of the top plate 13a, the bottom plate 15a and the side plate, which is positioned at the opening, and the binding wraps the edge of each plate body, so that the scratch of the top plate 13a to students is avoided.

Further, the application is also provided with a hook 12a outside the side plate, and the hook 12a is used for hanging articles such as schoolbags or handbag of students.

Further, as shown in fig. 8, the student desk and chair further comprises a storage bag 10 detachably mounted on the back of the back plate, the storage bag 10 is provided with an inner cavity for storing articles, an opening is formed in the top of the inner cavity, a flip cover 101 is arranged at the top opening of the storage bag 10 in a covering mode, the flip cover 101 comprises a folded edge 1011, the folded edge 1011 bends towards the storage bag 10, the inner side of the folded edge 1011 is attached to the outer side of the storage bag 10, the folded edge 1011 is magnetically attracted and fixed with the cavity wall of the inner cavity of the storage bag, the arrangement of the folded edge 1011 can improve the sealing performance of the storage bag 10, and the storage bag 10 is close to the back surface of the back plate 2. Through set up the collecting bag that a set can dismantle on desk chair, can provide more article storage space for the student, originally set up the book fill in the desk and can be used for placing teaching materials such as books specially, can be used for placing student noon break articles such as woollen blanket, eye-shade, sound insulation earplug in the collecting bag specially, be convenient for classification and management of student's article like this.

Furthermore, the height of the tablet chair in the application is also set to be adjustable (the height adjustment principle of the tablet chair is the same as that of a desk, and is not repeated here), and students in different height sections can lie on the top plate 13a and the leaning plate 2 in noon break by adjusting the heights of the tablet chair and the desk.

Further, referring to fig. 1 and 8, the tablet chair includes a seat board 1, a back board 2, a leg supporting board 9 and a head supporting board 23, wherein the seat board 1 is horizontally placed, the back board 2 is arranged on one side of the seat board 1 and is rotationally connected with the back board 1, an included angle between the back board 2 and the seat board 1 is adjusted through an adjusting mechanism, the leg supporting board 9 is stored under the seat board 1 through a guiding component 4, when a student needs noon break, the student can recline on the tablet chair only by adjusting the back board 2 and guiding out the leg supporting board 9, and the leg supporting board 9 supports the lower leg of the student, so that the student has good noon break experience.

Further, adjustment mechanism includes first baffle and locking piece, wherein bedplate 1 level is placed, backup plate 2 sets up in the one side of bedplate 1, and rotate between bedplate 1 and the backup plate 2 and be connected, change the contained angle between bedplate 1 and the backup plate 2 through rotating backup plate 2, be provided with first baffle 14 on bedplate 1, when backup plate 2 rotates to the time of offseting with first baffle 14, the angle adjustment between backup plate 2 and the bedplate 1 is biggest, the student can lean against backup plate 2 and rest, and locking piece 3 sets up on backup plate 2's rotation route, and locking piece 3 locates on backup plate 2 rotation route between backup plate 2 and the first baffle 14, be equipped with the portion of support 35 on locking piece 3, when locking piece 3 and backup plate 2 looks butt, the inclination between backup plate 2 and the backup plate 2 is minimum, student leans against and can keep good position on backup plate 2, locking piece 3 carries out movable setting, when moving to the backup plate 2, can keep away from the movable setting up with locking piece 3 and keep close to the radius when moving to the backup plate 2, when moving to the radius when locking piece 3 is kept close to 2, can keep on locking piece 2, and when moving to the radius is kept close to 2.

Further, in the first embodiment of the back plate adjusting mechanism shown in fig. 8 to 12, the seat plate 1 mainly includes a plate body 11 and a support frame 12, wherein the support frame 12 is a hollow directional frame structure, the plate body 11 is installed at the upper end of the support frame 12, one side of the seat plate 1 connected to the back plate 2 is a rear side, one side of the seat plate 1 opposite to the back plate 2 is a front side, and the other two sides of the seat plate 1 are left and right sides; the left and right sides of the support plate 2 are provided with a shaft hole, a connecting disc 13 is arranged above the support frame 12, the connecting disc 13 is correspondingly arranged at the shaft holes on the left and right sides of the support plate 2, a rotating shaft 16 is arranged in the connecting disc 13 and the shaft hole, the support plate 2 and the seat plate 1 are rotationally connected through the rotating shaft 16, a first baffle 14 and a second baffle 15 are also arranged on the support frame 12, the first baffle 14 and the second baffle 15 are respectively provided with a rod piece with rectangular cross section, the first baffle 14 and the second baffle 15 are mutually parallel, the second baffle 15 is arranged at the rear side of the support frame 12, the first baffle 14 is arranged at the position of the second baffle 15 close to the front side, two abutting joints 21 are arranged at the bottom of the support plate 2, the abutting joints 21 extend downwards and penetrate through the support frame 12, the abutting joints 21 are arranged below the rotating shaft 16, and the abutting joints 21 are positioned between the first baffle 14 and the second baffle 15, so that the abutting joints 21 can only be arranged between the first baffle 14 and the second baffle 15 when rotating, the abutting joints 14 and the second baffle 15 are in a certain angle between the first baffle 2 and the second baffle 15 is formed, the abutting joint 21 is inclined between the first baffle 2 and the second baffle 2, the abutting joint 21 is arranged at an inclined angle between the first baffle 2 and the second baffle 2, the abutting joint between the first baffle 1 and the first baffle 21 and the second baffle 1, the backup plate 2 and the seat plate 1 form an included angle of 100 degrees, at this time, the backup plate 2 cannot continue to rotate towards the seat plate 1, the included angle between the seat plate 1 and the support of the backup plate 2 is minimum, and meanwhile, the locking piece 3 abuts against the abutting joint 21 to prevent the backup plate 2 from rotating towards the direction of the first baffle 14, namely, the inclination angle of the backup plate 2 is prevented from becoming larger, so that the backup plate 2 is fixed at a position of 100 degrees (nearly vertical).

Further, an elastic reset piece 31 is further arranged between the locking piece 3 and the seat board 1, the elastic reset piece 31 pulls the locking piece 3 to move towards the direction of the seat board 1, namely pulls the locking piece 3 to move towards the rotating path of the abutting joint 21, so that the locking piece 3 can provide stable abutting joint for the abutting joint 21, and the backup plate 2 is placed to rotate randomly.

Further, the locking piece 3 in the application is composed of two connecting rods 32 and an operating rod 33, the two connecting rods 32 are opposite and are arranged in parallel, two ends of the operating rod 33 are respectively connected with the two connecting rods 32, and the ends of the two connecting rods 32 in the same direction are fixedly connected with the operating rod 33, so that a U-shaped structure is formed; the end of the connecting rod 32 far away from the operating rod 33 is a butt end 323, an upper connecting plate 324 is arranged above the connecting rod 32, a first mounting part 321 and a second mounting part 322 are arranged on the upper connecting plate 324, a corresponding lower connecting plate 17 is arranged below the seat board 1, the first mounting part 321 is hinged with the seat board 1 of the lower connecting plate 17, the second mounting part 322 is used for connecting an elastic resetting piece 31, the first mounting part 321 is close to the end far away from the operating rod 33, a butt part 35 is arranged at the end of the connecting rod 32 close to the operating rod 33, a second mounting part 322 is arranged between the first mounting part 321 and the butt part 35, thus ensuring that when the operating rod 33 is pressed down, the first mounting part 321 provides a fulcrum effect, the butt part 35 rotates towards the direction far away from the seat board 1, the abutting effect of the abutting joint 21 is canceled, the abutting joint 21 can rotate towards the direction of the first gear 14, when the force of the operating rod 33 is eliminated, the elastic reset piece 31 can drive the locking piece 3 to reset, the abutting part 35 is continuously located on the rotating path of the abutting joint 21, one side of the abutting part 35 towards the first gear 14 is provided with an inclined transition section, so that the abutting part 35 forms a hill shape with decreasing size from bottom to top, the abutting joint 21 of the abutting plate 2 can jack the abutting part 35 until the abutting joint 21 is separated from the abutting part 35 at a high point, the abutting part 35 automatically resets at the moment, the gradients at two sides of the abutting part 35 have larger difference, the slope of one side of the supporting part 35 towards the first gear 14 is smaller, and the slope of one side of the supporting part 35 towards the second gear 15 is larger, so that when the inclination angle of the backup plate 2 is adjusted from big to small, the supporting joint 21 is convenient to synchronously support the supporting part 35 to move, the backup plate 2 is convenient to adjust to a near vertical state, and when the inclination angle of the backup plate 2 is adjusted from small to big, the supporting part 35 is difficult to synchronously support by the supporting joint 21, and the stability of the backup plate 2 in the near vertical state is ensured.

Preferably, the length of the connecting rod 32 is appropriately lengthened, so that the connecting rod 32 can extend to the outer side of the horizontal direction of the seat board 1, and thus the operating rod 33 is correspondingly arranged at the outer side of the downward mapping range of the seat board 1, so that students can conveniently and directly press the operating rod 33 without penetrating hands below the seat board 1 to perform corresponding operation, and the operation convenience of the locking piece 3 is improved.

Further, the distance from the abutting end 323 of the connecting rod 32 to the first mounting portion 321 is greater than the distance between the first mounting portion 321 and the base, so that when the operating lever 33 is pressed down, the abutting end 323 of the connecting rod 32 can rotate upwards with the first mounting portion 321 as the center, the abutting end 323 can abut against the lower side of the seat board 1, the operating lever 33 can not be continuously pressed down, the traction force applied to the elastic restoring piece 31 can not be increased limitlessly, a good protection effect can be provided for the elastic restoring piece 31, the condition that the elastic restoring piece 31 is easy to fail is avoided, and the service life of the tablet chair is prolonged.

Preferably, the elastic restoring member 31 in the present application may be a spring, and the spring may be connected to the first gear 14.

Further, referring to fig. 13, the backup plate 2 of the present application is further provided with a reinforcing rod 22, the reinforcing rod 22 is square, a clamping groove is formed in the back surface of the backup plate 2, the clamping groove is in a strip shape, the clamping groove is formed from top to bottom, the reinforcing rod 22 is fixed in the clamping groove, the reinforcing rod 22 is detachably mounted in the clamping groove through a bolt in the later stage, the lower end portion of the reinforcing rod 22 extends to the lower side of the backup plate 2, the abutting joint 21 is an extending end of the reinforcing rod 22 extending out of the backup plate 2, the reinforcing rod 22 can strengthen the structural strength of the backup plate 2 on one hand, and on the other hand, the mode of integrally arranging the abutting joint 21 directly with the backup plate 2 can also enable the strength of the abutting joint 21 to be higher, and the service life of the abutting joint 21 to be longer. In order to provide better cladding to the stiffener 22, be provided with two pairs of splint 24 in the lower extreme correspondence of backup plate 2, splint 24 connect two cell wall positions at the draw-in groove, and every pair of splint 24 corresponds a stiffener 22, and stiffener 22 is held by two splint 24, under the effect of splint 24, can be fine avoid the square of metal material to lead to and produce very big noise when leaning on first shelves body 14, second shelves body 15 or supporting portion 35 to influence student's noon break.

Further, a handle hole 25 is provided above the back plate 2, so that the tilt state of the back plate 2 can be adjusted by the handle.

Preferably, the elastic restoring member 31 is a spring, which is provided on the side of the first mounting portion 321 near the lever 33 in the above embodiment, where the spring provides a force pulling the locking member 3 to move toward the seat plate 1, while in other embodiments, the spring may be provided on the side of the first mounting portion 321 near the abutment end 323, where the spring provides a force pushing the locking member 3 away from the seat plate 1.

Referring to fig. 14 and 15, the working principle of the application is as follows:

in the lesson mode, the abutment joint 21 abuts against the second baffle 15 and the abutment part 35, the backup plate 2 is limited at a near vertical position, and the three points of the rotating shaft 16 of the backup plate 2, the second baffle 15 and the abutment part 35 enable the backup plate 2 and the seat plate 1 to be fixed into a stable 100-degree slight inclined state for students to sit down to use as a backrest.

When the mode is changed from the lesson mode to the noon break mode, the student lightly presses the operating lever 33 downwards, and simultaneously lightly pushes the leaning board 2, the operating lever 33 rotates downwards through the first mounting part 321, at the moment, the abutting part 35 leaves the rotating path of the abutting joint 21, the abutting effect on the abutting joint 21 is canceled, the leaning board 2 rotates backwards until the abutting joint 21 abuts against the first gear 14, the leaning board 2 and the seat board 1 are in a 150-degree near lying state, the mode is changed into the noon break mode, and the student can lie on the noon break mode.

When the mode is converted from the noon body mode to the lesson mode, a student lightly presses the operating rod 33 downwards (or does not press downwards), lightly lifts the backup plate 2, the supporting part 35 avoids the supporting joint 21 to rotate until the supporting joint 21 of the backup plate 2 is abutted on the second gear body 15, the elastic reset piece 31 pulls the locking piece 3 to return, the supporting part 35 is abutted on the supporting joint 21 at the same time, and the rotating shaft 16 of the backup plate 2, the second gear body 15 and the supporting part 35 enable the backup plate 2 and the seat plate 1 to be fixed into a stable 100-degree slight inclined state for the student to sit down and use as a backrest.

Referring to fig. 16 to 18, in a second embodiment of the reclining mechanism, a supporting frame 12 is a hollow directional frame structure (also forming part of supporting legs), a plate body 11 is mounted on an upper end of the supporting frame 12, wherein a side of a seat plate 1 connected to a reclining plate 2 is a rear side, a side of the seat plate 1 opposite to the reclining plate 2 is a front side, and other sides of the seat plate 1 are left and right sides; the support frame 12 is also provided with a first baffle 14 and a second baffle 15, the first baffle 14 and the second baffle 15 are integrally arranged on the connecting disc, the second baffle 15 is arranged at the rear side of the support frame 12, the first baffle 14 is arranged at the position of the second baffle 15 close to the front side, the support frame 2 is provided with two reinforcing rods 22, the reinforcing rods 22 are hollow bending pipes, clamping grooves are arranged at the back surface of the support frame 2, the reinforcing rods 22 are fixed in the clamping grooves, the reinforcing rods 22 are detachably arranged in the clamping grooves at the later stage through bolts, the lower end parts of the reinforcing rods 22 extend to the lower side of the support frame 2, the abutting joint 21 is a metal sheet metal part arranged at the extending end part of the reinforcing rods 22, the reinforcing rods 22 can be arranged at the position of the second baffle 15 close to the front side, the abutting joint 21 can be directly arranged between the reinforcing rods 22 and the abutting joint 21 in a high-strength manner, and the abutting joint 21 can be directly arranged between the abutting joint 21 and the second baffle 2 on the one hand, the abutting joint 21 can be used for making the abutting joint 21 and the abutting joint 14 have a longer service life, therefore, the abutting joint 21 can only rotate between the first baffle 14 and the second baffle 15 when rotating, the range of the inclination angle of the leaning plate 2 is limited, the first baffle 14 is arranged at the front side of the abutting joint 21, when the abutting joint 21 abuts against the first baffle 14, an included angle of 150 degrees is formed between the leaning plate 2 and the seat plate 1, students can conveniently recline on the leaning plate 2 for noon break, when the abutting joint 21 abuts against the second baffle 15, an included angle of 100 degrees is formed between the leaning plate 2 and the seat plate 1, the leaning plate 2 cannot continue to rotate towards the seat plate 1, the included angle between the seat plate 1 and the support of the leaning plate 2 is minimum, meanwhile, the locking piece 3 abuts against the abutting joint 21, the leaning plate 2 is prevented from rotating towards the direction of the first baffle 14, namely, the inclination angle of the leaning plate 2 is prevented from being increased, and the leaning plate 2 is fixed at a position of 100 degrees (nearly vertical).

Further, the locking member 3 in the second embodiment is composed of two upper connecting plates 324 and one lever 33, the two connecting rods 32 are opposite and parallel, two ends of the lever 33 are respectively connected with the two upper connecting plates 324, the upper connecting plates 324 are provided with a first mounting portion 321 and a second mounting portion 322, the first mounting portion 321 is hinged with the connecting disc 13, the second mounting portion 322 is used for connecting the elastic resetting member 31, the first mounting portion 321 is close to one end far away from the lever 33, the second mounting portion 322 is arranged between the first mounting portion 321 and the abutting portion 35, so that when the lever 33 is pressed down, the first mounting portion 321 provides a fulcrum effect, the abutting portion 35 rotates in a direction away from the seat plate 1, the abutting effect on the abutting joint 21 is cancelled, the abutting joint 21 can rotate towards the first gear 14, and when the lever 33 is forced to disappear, the elastic resetting member 31 can drive the locking member 3 to return, and the abutting portion 35 can continue to fall onto the rotating path of the abutting joint 21.

The upper connecting plate 324 is close to the butt end 323 that the one end of second installation department 322 was offseted with bedplate 1, the interval of butt end 323 to first installation department 321 is greater than the interval between first installation department 321 to the base, just so makes when pushing down control lever 33, and the butt end 323 can offset with the downside of bedplate 1, and control lever 33 just can not continue to be pushed down this moment, and the traction force that elastic restoring piece 31 received just so can not unrestricted grow, and then can provide good protective effect to elastic restoring piece 31, avoid elastic restoring piece 31 to become invalid the condition easily, promotes the life of tablet chair.

Further, the tablet chair of the present application further comprises a supporting leg 18, the supporting leg 18 comprises a supporting base 181 and an adjusting rod 182, the supporting base 181 is provided with a sleeve, the top of the sleeve is provided with an opening, the adjusting rod 182 penetrates into the sleeve from the top of the sleeve, the adjusting rod 182 is connected to the bottom of the seat plate, the adjusting rod 182 is uniformly provided with a plurality of threaded holes in the height direction, the outside of the sleeve is oppositely provided with a positioning screw, the adjusting rod 182 is adjusted to a proper height, and the positioning screw is used for positioning the adjusting rod, so that the tablet chair can be adjusted to a proper height.

Further, as shown in fig. 19 and 20, the student tablet chair further includes a head support plate 23 and a telescopic rod 26, an opening is provided at the upper end of the backup plate, the telescopic rod 26 is a rod member, the reinforcing rod 22 has an upper port, the reinforcing rod 22 is a hollow pipe member, the upper section of the reinforcing rod 22 is a straight section, the telescopic rod 26 can penetrate from the upper port of the reinforcing rod 22, a damping sleeve 27 is further provided between the reinforcing rod 22 and the telescopic rod 26, the damping sleeve 27 is arranged between the telescopic rod 26 and the reinforcing rod 22, and the damping sleeve 27 is fixed inside the reinforcing rod 22 to allow the telescopic rod 26 to slide up and down along the reinforcing rod 22 and maintain the sliding relative position by damping force.

Further, the damping sleeve 27 has one end fitted to the lower end of the telescopic rod 26 and the other end protruding outwards to form a contact flange 271, the contact flange 271 can be abutted against the outer side of the upper end of the reinforcing rod 22, that is, the telescopic rod 26 is abutted against the inner wall surface of the reinforcing rod 22 through the damping sleeve 27 and can form friction damping, the contact flange 271 is also provided with a positioning bead 28, the ball part of the positioning bead 28 protrudes from the inner side of the damping sleeve 27, the positioning bead 28 is closely contacted with the telescopic rod 26, a plurality of positioning holes 261 are uniformly arranged in the length direction of the telescopic rod 26, and after the telescopic rod 26 extends out for a certain length, the positioning bead 28 is embedded into one of the positioning holes 261, so that the head supporting plate 23 is fixed at a certain position, that is, when the telescopic rod 26 is adjusted for a telescopic length, the telescopic rod 26 is pulled out of the original positioning holes 261, and after the telescopic rod 26 is adjusted to a required length, the positioning bead 28 is clamped to the corresponding positioning holes 261, so that the telescopic rod 26 is locked on the reinforcing rod 22 again. That is, the telescopic rod can be adjusted step by step according to the different positioning holes 261 on the reinforcing rod 22, so that the telescopic rod can be arbitrarily adjusted in a certain length range, and the telescopic rod can be slid to a proper distance, and the telescopic rod 26 and the head supporting plate 23 are fixed so as to adjust the interval between the head supporting plate and the telescopic rod, so that the telescopic rod can be suitable for students with different heights.

In order to prevent the telescopic rod 26 from separating from the reinforcing rod 22, the application also provides a locating pin 262 at the end of the telescopic rod 26, and a clamping groove 272 on the damping sleeve 27, wherein the clamping groove 272 is opposite to the locating pin 262, and when the telescopic rod 26 is extended to the limit position, the locating pin 262 slides into the clamping groove 272 to prop against the damping sleeve 27, thereby preventing the telescopic rod 26 from separating from the reinforcing rod 22.

Preferably, the back of the back plate 2 is also provided with hooks 29 for hanging student articles.

Further, referring to fig. 21 to 25, the guide assembly 4 includes a guide 41, the guide 41 is fixed on the tablet chair, and the leg rest 9 is movably connected with the guide 41, so as to ensure that the leg rest 9 moves on the guide 41, wherein the guide 41 is mainly used for guiding the leg rest 9 to be housed under the seat plate 1, and the leg rest 9 can be pushed to move on the guide 41 to move the leg rest 9 under the seat plate 1 without using the leg rest 9 when the student is in class.

Specifically, the guide member 41 in this embodiment is a pair of horizontally arranged guide rails, the guide member is fixed on the first rail body 14, the guide rail is arranged right below the seat board 1, the guide rail is directly fixed with the seat, the guide rail is provided with a chute 42, a baffle 43 is arranged at the notch of the chute 42, the baffle 43 is arranged at two sides of the chute 42 in the length direction, two sliding members 5 are respectively arranged at two opposite sides of the leg support plate 9, the sliding members 5 are arranged in the chute 42, so that the sliding members 5 can slide in the chute 42 and further drive the leg support plate 9 to slide along the guide rail, the baffle 43 can limit the sliding members 5 in the chute 42, the sliding members 5 are prevented from being separated from the chute, and stable sliding of the sliding rails in the chute 42 is ensured. In order to ensure that the sliding piece 5 does not separate from the sliding groove 42 in the length direction of the sliding groove 42, two limiting blocks 6 are further arranged at two end positions of the sliding groove 42 of the guide rail respectively, the limiting blocks 6 block the sliding path of the sliding piece 5, the sliding piece 5 can only slide between the two limiting blocks 6, and stable sliding of the leg supporting plate 9 on the guide rail can be realized through the limiting blocks 6 and the baffle 43. In other embodiments, the guide member 41 may be configured as a sliding rod, on which the sliding member 5 is sleeved to slide, and the limiting blocks 6 are directly sleeved and fixed on two ends of the sliding rod, so that the sliding member 5 can be limited on the sliding rod.

Specifically, in the application, two ends of the chute 42 penetrate, the limiting block 6 enters the chute 42 from the end part of the chute 42, the chuck 61 is arranged on the limiting block 6, when the limiting block 6 is installed inside the chute 42, the chuck 61 is clamped outside the chute 42, the hook groove 62 is correspondingly arranged in the middle part of the limiting block 6, the corresponding through hole 44 is arranged outside the guide rail, the hook groove 62 and the through hole 44 are correspondingly arranged when the limiting block is installed, and the bolt 8 sequentially penetrates the through hole 44 and the hook groove 62 from the outer side of the guide rail, so that the limiting block 6 is fixed inside the chute 42, and therefore, the limiting block 6 can be fixed on the guide rail without falling off or corresponding sliding.

Further, a bracket 7 is arranged below the leg supporting plate 9, the bracket 7 is detachably arranged below the leg supporting plate 9, the leg supporting plate 9 is connected with the sliding piece 5 through the bracket 7, the bracket 7 is provided with a group of bent rods, the bent shape of the bracket 7 is U-shaped, the bracket 7 comprises two parallel supporting rods 71, the bracket 7 and the leg supporting plate 9 are fixed through fixing codes 72, a bracket 7 fixing groove (not shown in the figure) is designed on the back surface of the leg supporting plate 9, the bracket 7 is placed in the bracket 7 fixing groove, the fixing codes 72 are pressed on one side of the bracket 7 relative to the leg supporting plate 9, then the fixing codes 72 and the leg supporting plate 9 are fastened through bolts 8, the fixing codes 72 and the leg supporting plate 9 can be fixed in a clamping mode in other embodiments, one guide rail is respectively arranged on two opposite sides of the leg supporting plate 9, each supporting rod 71 corresponds to one guide rail, the inner sides of the two guide rails, the supporting rods 71 are directly connected with the sliding piece 5, the supporting rods 71 and the sliding piece 5 are rotatably connected with the sliding piece 5, the two sides of the supporting rods are coaxially arranged on the two sides of the leg supporting piece 5, namely, the two sides of the supporting piece 9 can rotate, and the two sides of the supporting piece 9 can rotate, namely the two supporting pieces can rotate, the shaft center of the leg 9 can rotate, and the shaft center of the supporting piece 9 can be adjusted, and the shaft center of the supporting piece can be adjusted, and the shaft center of the leg can rotate, and the supporting piece 9 can rotate, and the shaft can rotate.

The application further provides a positioning structure of the leg support plate 9, the positioning structure comprises a positioning part 73, the positioning part 73 is arranged at the end part of the supporting rod 71 of the bracket 7, when the leg support plate 9 is horizontal to the seat plate 1, the positioning part 73 is not contacted with the seat plate 1, the leg support plate 9 can horizontally slide on a guide rail, when the leg support plate 9 rotates, the positioning part 73 props against the seat plate 1, the position between the leg support plate 9 and the seat plate 1 is kept unchanged, the rotation amplitude of the leg support plate 9 is limited by the propping against of the positioning part 73 and the seat plate 1, and the positioning part 73 is fixed at the optimal inclined position.

Further, the stopper 6 is further provided with a clamping groove 63, the clamping groove 63 is arranged on the stopper 6, the clamping groove 63 is a through groove, bayonets are arranged at two ends of the clamping groove 63 parallel to the length direction of the guide rail, the clamping groove 63 is used for enabling two ends of the stopper 6, which are positioned on the length direction of the guide rail, to be communicated, the leg support plate 9 is provided with lugs 91, the lugs 91 are arranged on the side parts of the leg support plate 9, corresponding to the guide rail, of the leg support plate 9, and each of the two sides of the leg support plate 9 is provided with a lug 91.

Further, in a preferred embodiment, the lugs 91 and the slider 5 are provided on the side portions of the leg rest 9, respectively, and the lugs 91 and the slider 5 are positioned in both front and rear directions of the leg rest 9, so that a supporting effect is exerted on the leg rest 9 at positions near the four corners, thereby uniformly supporting the leg rest 9.

Further, the front surface of the leg supporting plate 9 is shaped according to a curved surface designed by human engineering, grooves which are matched with the lower legs of a human body are formed in the leg supporting plate 9, a plurality of evenly distributed ventilation holes are formed in the middle of the grooves, two sides of the surface of the leg supporting plate 9 are slightly lifted, the legs of a student can be comfortably attached to the leg supporting plate 9, anti-slip lines are formed in the surface of the leg supporting plate 9, and the lower slip of the legs of the student is prevented.

Preferably, the sliding part 5 is a roller, and the roller can effectively reduce sliding resistance, reduce noise, improve user experience and prolong service life.

Referring to fig. 1 and 26, fig. 1 is a schematic view showing a combined structure of a first embodiment of a desk and a first embodiment of a tablet chair, fig. 26 is a schematic view showing a combined structure of a second embodiment of a desk and a second embodiment of a tablet chair, and the leg rest structure in fig. 26 is completely identical to the structure in fig. 1, so that it is not shown.

The noon break process of the students in the application is as follows:

When students need noon break, only the panel 2a is required to be turned over to a vertical state, the top plate 13a of the book hopper 1a is exposed, meanwhile, the operating rod 33 is lightly pressed downwards, meanwhile, the leaning plate 2 is lightly pressed, the operating rod 33 rotates downwards through the first mounting part 321, at the moment, the leaning part 35 leaves the rotating path of the leaning joint 21, the leaning effect of the leaning joint 21 is cancelled, the leaning plate 2 rotates backwards until the leaning joint 21 leans against the first baffle 14, the leaning plate 2 and the seat plate 1 are in a 150-degree close lying flat state, the leg supporting plate 3 is manually pulled out from the guide rail until the sliding piece 5 leans against the front limiting block 6, the leg supporting plate 3 is not slid any more, at the moment, the leg supporting plate 3 is supported only by the sliding piece 5, the leg supporting plate 3 rotates under the action of gravity until the positioning part 73 leans against the seat plate 1, the students lean against the leaning plate 2, the heads of the students rest on the top plate 13a, and the legs of the students can be placed on the leg supporting plate 3 for noon break. In general, the students can have noon break only by three-step adjustment, so that the students do not need to move desks and chairs or greatly adjust the desks and chairs, the problem of noon break of the students can be well solved, and meanwhile, the desks and chairs have low noise in the changing process and do not influence rest of other students.

Preferably, the distance between the front and the back of the desk is only 90CM, 45-48 desk and chairs can be placed in an existing standard classroom to adapt to the actual conditions of the current school, students with the height of 1.2-2.0 m can be used as the desk and chair for noon break, the chair can bear 150KG weight for noon break, the chair plate is widened, hands of the students can be placed on two sides during noon break, and the noon break is more comfortable.

Furthermore, the noon body desk and chair of the application is specially designed to be breathable, and the seat board, the leaning board, the leg supporting board and the head supporting board are all provided with the breathable holes, so that the problem of the ventilation of the noon body in hot summer is solved.

In addition, the desk and the chair adopt an optimized modularized design, the lower half part is less in shielding, and students can clean the desk and the chair conveniently.

It should be noted that the above-mentioned embodiments are merely for illustrating the technical solution of the present invention, and not for limiting the same, and although the present invention has been described in detail with reference to the above-mentioned embodiments, it should be understood by those skilled in the art that the technical solution described in the above-mentioned embodiments may be modified or some technical features may be equivalently replaced, and these modifications or substitutions do not make the essence of the corresponding technical solution deviate from the spirit and scope of the technical solution of the embodiments of the present invention.

Claims

1. A student desk and chair comprising:

The desk comprises a book hopper, the book hopper comprises a top plate which is obliquely arranged, the book hopper comprises a storage cavity, the storage cavity comprises an opening and a back which is opposite to the opening, and the top plate is obliquely downwards arranged from one end of the opening to one end of the back;

the tablet chair comprises a seat board, a backup board and a leg supporting board, wherein an included angle between the backup board and the seat board is adjustable, the leg supporting board and the seat board are movably connected through a guide assembly, and the guide assembly is used for guiding the leg supporting board to be movably contained below the seat board;

the tablet chair further comprises an adjusting mechanism, wherein the adjusting mechanism comprises:

the first baffle body is arranged on the backup plate rotating path and is used for abutting against the backup plate;

the locking piece is movably arranged between the backup plate and the first baffle body, moves to the backup plate rotating path to be in abutting connection with the backup plate, and moves to the outside of the backup plate rotating path to be out of abutting connection with the backup plate;

the locking member includes:

the upper connecting plates comprise a first mounting part, a second mounting part and a propping part, the first mounting part is hinged with the seat plate, and the propping part is propped against the backup plate;

The control rod is connected between the two upper connecting plates, one end of the upper connecting plate, which is far away from the control rod, is an abutting end abutting against the seat plate, and the distance between the abutting end and the first installation part is larger than the distance between the first installation part and the base;

The elastic resetting piece is connected between the second installation part and the seat board, the first installation part is arranged at one end far away from the operating rod, and the second installation part is arranged between the first installation part and the supporting part.

2. The student desk and chair of claim 1 wherein the desk further comprises a faceplate, the faceplate being disposed above the book well and being in flip-over connection with the book well.

3. The student desk and chair of claim 2, wherein the desk further comprises a turnover mechanism, the turnover mechanism comprises a locking structure, the locking structure comprises a lock rod, one end of the lock rod is rotationally connected with the panel, the other end of the lock rod is slidingly connected with the book hopper, and the book hopper further comprises a clamping groove arranged on the desk body and used for clamping and positioning the lock rod.

4. The student desk and chair as claimed in claim 1 wherein the top plate is provided with a recess which is shaped to fit the shape of the human head, the recess being provided with ventilation holes.

5. The student desk and chair of claim 3 wherein the turnover mechanism further comprises an elastic buffer structure, two ends of the elastic buffer structure are respectively connected with the panel and the book hopper in a rotating manner.

6. The student desk and chair as claimed in claim 1, wherein the backup plate comprises a rotating shaft and a abutting joint, the rotating shaft is horizontal, the abutting joint is arranged below the rotating shaft, and the abutting joint is used for abutting the abutting part and the first gear;

the seat board comprises a support frame, a second gear body and a first gear body are arranged on the support frame, the second gear body is used for being abutted to the abutting joint, the first gear body and the second gear body are respectively arranged on two sides of the abutting joint, and the abutting joint swings between the first gear body and the second gear body.

7. The student desk and chair as claimed in claim 1, wherein the guide assembly comprises a guide member, the guide member is a pair of guide rails, the leg support plate is provided with a sliding member, the leg support plate is rotatably connected with the sliding member, the sliding members positioned on two sides of the leg support plate are coaxially arranged, the sliding member is arranged on the guide rails, two ends of the guide rails are provided with limiting blocks, the limiting blocks can be abutted with the sliding members, the sliding member slides between the two limiting blocks, the limiting blocks are provided with clamping grooves, the leg support plate is provided with lugs, the lugs are arranged in the clamping grooves, and two ends of the clamping grooves parallel to the length direction of the guide rails are provided with bayonets through which the lugs slide.

8. The student desk and chair of claim 1 wherein the desk and chair are height adjustable and the student desk and chair further comprises a head rest assembly removably disposed on the back plate, the head rest assembly comprising a head rest plate and a telescoping rod connected between the back plate and the head rest plate, the telescoping rod being configured to adjust the distance between the back plate and the head rest plate.