CN112167829A

CN112167829A - Anti-cheating desk for middle school students

Info

Publication number: CN112167829A
Application number: CN202011167967.0A
Authority: CN
Inventors: 扈祺
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-10-27
Filing date: 2020-10-27
Publication date: 2021-01-05
Anticipated expiration: 2040-10-27
Also published as: CN112167829B

Abstract

An anti-cheating desk for middle school students belongs to the field of teaching aids. One ends of the four connecting rods are fixedly connected to the fixed rod, and the other ends of the four connecting rods are respectively connected to the corresponding movable rod I and the movable rod II through hinges; two output shafts of the two-way motor II are respectively and fixedly connected to the side surfaces of the connecting pieces of the two groups of conveying devices positioned at the top; one end of each shading cloth is wound on the central shaft, and the other end of each shading cloth penetrates through the movable rod I and is fixedly connected with the corresponding arc-shaped plate; the bookshelf can be placed on the bearing device of the bookshelf, so that the situation that books on the table top are stacked higher to influence the sight of students and teachers is avoided, and the bearing device can be used for storing each book separately or placing the same kind of books on one bearing device, so that the books are easy to find; moreover, the device can form an anti-cheating device for blocking sight during examination through the shading cloth and the arc-shaped plate, and prevent students on the left side and the right side from plagiarisming.

Description

Anti-cheating desk for middle school students

Technical Field

The invention relates to an anti-cheating desk for middle school students, and belongs to the field of teaching aids.

Background

The middle school students have high academic pressure, and need to use a large number of textbooks and exercise books, the single desk used in the current classroom has small storage cavity space, so that the students need to put part of books on the desk, which not only affects the realization that the students can see the blackboard, but also makes the teacher difficult to observe the expression of each student when giving lessons, so that the teacher can not judge the mastery degree of the students on the knowledge points through the expression of the students; and middle school student especially senior three, the graduation class student of junior three often need simulate the examination, and ordinary single desk does not shelter from the thing, does not possess the function of preventing cheating, leads to the strong student of virtual honor heart to copy the classmate of the left and right sides, even if be equipped with the device that shelters from the sight, the device fixed connection influences the realization that the student went class on the desktop, can dismantle the connection and install on the desktop and dismantle comparatively waste time and energy.

Disclosure of Invention

The invention aims to solve the problems in the background art and provide an anti-cheating desk for middle school students.

The invention achieves the purpose, and adopts the following technical scheme:

an anti-cheating desk for middle school students comprises a desk and a bookshelf; the desk comprises a desk plate, a storage cavity, two movable plates and two supports; the center of the bottom end of the table plate is fixedly connected with a storage cavity, and two supports are arranged on two sides of the storage cavity; the brackets are fixedly connected to the lower end of the table plate, and each bracket is provided with a slide way; the table plate is symmetrically provided with two notches, the bottom end of the table plate is provided with two grooves, each groove is communicated with the corresponding notch, and the grooves are also communicated with the sliding grooves on the corresponding support; each movable plate is connected to the table plate through a hinge, and the movable plates are in sliding fit with the notches;

the bookshelf comprises a height adjusting device and two bookshelf bodies; the height adjusting device is fixedly connected to the lower end of the storage cavity; the two bookshelf main bodies are symmetrical and fixedly connected to the height adjusting device;

the height adjusting device comprises a motor bracket, a bidirectional motor and two adjusting mechanisms; each adjusting mechanism comprises a sliding block, a supporting rod, a telescopic rod, a connecting block I, a fixing frame, a screw rod I, a connecting block II, a screw rod II, a threaded cylinder, a motor, a connecting block III and a connecting block IV; the upper end of the sliding block is fixedly connected with a supporting rod, and the side surface of the sliding block is fixedly connected with a connecting block III; the fixed end of the telescopic rod is connected to the upper end of the connecting block III through a hinge, and the movable end of the telescopic rod is connected to the lower end of the connecting block I through a hinge; the connecting block I is matched with the screw rod I through threads; one end of the screw I is connected to the fixing frame through a bearing, and the other end of the screw I is fixedly connected to an output shaft of the bidirectional motor; the bidirectional motor is connected to the motor bracket through a bolt; the connecting block II is fixedly connected to the side face of the movable end of the telescopic rod; the connecting block IV is fixedly connected to the side face of the fixed end of the telescopic rod; the screw II is fixedly connected to the lower end of the connecting block II, and the lower end of the screw II is in threaded fit with the threaded cylinder; the lower end of the threaded cylinder is fixedly connected to an output shaft of the motor; the motor is fixedly connected to the upper end of the connecting block IV through a bolt; the fixed frame and the motor bracket are fixedly connected to the lower end of the storage cavity; the sliding block and the supporting rod are in sliding fit with the slideway;

each bookshelf main body comprises two groups of transmission devices, a fixed rod, a two-way motor II, a telescopic limiting rod and a plurality of bearing devices; each group of transmission devices comprises a conveyor belt, two arc-shaped plates, two central shafts, two shading cloths, two movable rods I, two movable rods II, four connecting pieces and four connecting rods; one ends of the four connecting rods are fixedly connected to the fixed rod, and the other ends of the four connecting rods are respectively connected to the corresponding movable rod I and the movable rod II through hinges; the two movable rods I and the two movable rods II are sequentially connected end to end through four connecting pieces, and the two movable rods I are adjacent; the conveying belts are sleeved at the outer ends of the four connecting pieces, a plurality of grooves are formed in one side, close to the connecting pieces, of each conveying belt, and round holes are formed in opposite surfaces of the conveying belts on the two groups of conveying devices; two ends of each bearing device are respectively and fixedly connected in round holes on the conveyor belts on the two groups of conveying devices; the lower end of the limiting telescopic rod is fixedly connected to the fixing rod, and the upper end of the limiting telescopic rod is fixedly connected with a two-way motor II; two output shafts of the two-way motor II are respectively and fixedly connected to the side surfaces of the connecting pieces of the two groups of conveying devices positioned at the top; each movable rod I is provided with an inner cavity, and a central shaft is connected in the inner cavity through a reed; one end of each shading cloth is wound on the central shaft, and the other end of each shading cloth penetrates through the movable rod I and is fixedly connected with the corresponding arc-shaped plate;

the fixed rod is fixedly connected to the upper end of the supporting rod, and the fixed rod is in sliding fit with the slide way and the groove.

Compared with the prior art, the invention has the beneficial effects that: the bookshelf can be used for placing books on the bearing device of the bookshelf, so that the condition that the books on the table top are stacked higher to influence the sight of students and teachers is avoided, and the bearing device can be used for storing each book separately or placing the same kind of books on one bearing device, so that the books are easy to find; moreover, the device can form an anti-cheating device for blocking sight during examination through the shading cloth and the arc-shaped plate, and prevent students on the left side and the right side from plagiarisming.

Drawings

FIG. 1 is a front view of an anti-cheating desk for middle school students according to the present invention;

FIG. 2 is a front view of a desk of the anti-cheating desk for middle school students according to the present invention;

FIG. 3 is a bottom view of a top plate of the anti-cheating desk for middle school students according to the present invention;

FIG. 4 is a top view of a desk plate of an anti-cheating desk for middle school students according to the present invention;

FIG. 5 is a side view of a stand of the anti-cheating desk for middle school students according to the present invention;

FIG. 6 is a front view of a bookshelf of an anti-cheating desk for middle school students according to the present invention;

FIG. 7 is a schematic view illustrating a structure of a height adjusting means of an anti-cheating desk for middle school students according to the present invention;

FIG. 8 is a sectional view of a bookshelf body of an anti-cheating desk for middle school students according to the present invention;

FIG. 9 is a front view of a bookshelf body of an anti-cheating desk for middle school students according to the present invention;

FIG. 10 is a side view of the transmission of the anti-cheating desk for middle school students according to the present invention;

FIG. 11 is a schematic view showing the internal structure of a movable bar I of the anti-cheating desk for middle school students according to the present invention;

FIG. 12 is a schematic structural view of a fixing lever of an anti-cheating desk for middle school students according to the present invention;

FIG. 13 is a schematic view of the connection between the stopper and the connecting rod of the anti-cheating desk for middle school students according to the present invention;

FIG. 14 is a schematic view illustrating a structure of a connecting member of an anti-cheating desk for middle school students according to the present invention;

FIG. 15 is a front cross-sectional view of a load bearing device of an anti-cheating desk for middle school students according to the present invention;

FIG. 16 is a side cross-sectional view of a load bearing device of a middle school student anti-cheating desk according to the present invention;

fig. 17 is a schematic view of the combination of the bookshelf and the desk opening of the anti-cheating desk for middle school students.

Detailed Description

The technical solutions in the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the invention, rather than all embodiments, and all other embodiments obtained by those skilled in the art without any creative work based on the embodiments of the present invention belong to the protection scope of the present invention.

The first embodiment is as follows: as shown in fig. 1 to 17, the present embodiment describes an anti-cheating desk for middle school students, which includes a desk 1 and a bookshelf 2; the desk comprises a desk plate 1-1, a storage cavity 1-3, two movable plates 1-4 and two supports 1-7; the center of the bottom end of the table plate 1-1 is fixedly connected with a storage cavity 1-3, and two supports 1-7 are arranged on two sides of the storage cavity 1-3; the supports 1-7 are fixedly connected to the lower end of the table board 1-1, and each support 1-7 is provided with a slide way 1-2; the table plate 1-1 is symmetrically provided with two notches 1-5, the bottom end of the table plate 1-1 is provided with two grooves 1-6, each groove 1-6 is communicated with the corresponding notch 1-5, and the grooves 1-6 are also communicated with the sliding chutes 1-2 on the corresponding supports 1-7; each movable plate 1-4 is connected to the desk plate 1-1 through a hinge, and the movable plates 1-4 are in sliding fit with the notches 1-5;

the bookshelf 2 comprises a height adjusting device 2-1 and two bookshelf bodies 2-2; the height adjusting device 2-1 is fixedly connected to the lower end of the storage cavity 1-3; the two bookshelf bodies 2-2 are symmetrical and fixedly connected to the height adjusting device 2-1;

the height adjusting device 2-1 comprises a motor bracket 2-1-7, a bidirectional motor 2-1-8 and two adjusting mechanisms; each adjusting mechanism comprises a sliding block 2-1-1, a supporting rod 2-1-2, a telescopic rod 2-1-3, a connecting block I2-1-4, a fixing frame 2-1-5, a screw rod I2-1-6, a connecting block II 2-1-9, a screw rod II 2-1-10, a threaded cylinder 2-1-11, a motor 2-1-12, a connecting block III 2-1-13 and a connecting block IV 2-1-14; the upper end of the sliding block 2-1-1 is fixedly connected with a supporting rod 2-1-2, and the side surface of the sliding block 2-1-1 is fixedly connected with a connecting block III 2-1-13; the fixed end of the telescopic rod 2-1-3 is connected to the upper end of the connecting block III 2-1-13 through a hinge, and the movable end of the telescopic rod 2-1-3 is connected to the lower end of the connecting block I2-1-4 through a hinge; the connecting block I2-1-4 is matched with the screw I2-1-6 through threads; one end of the screw I2-1-6 is connected to the fixed frame 2-1-5 through a bearing, and the other end of the screw I2-1-6 is fixedly connected to an output shaft of the bidirectional motor 2-1-8; the bidirectional motor 2-1-8 is connected to the motor bracket 2-1-7 through a bolt; the connecting block II 2-1-9 is fixedly connected to the side face of the movable end of the telescopic rod; the connecting block IV is fixedly connected to the side face of the fixed end of the telescopic rod; the screw II 2-1-10 is fixedly connected to the lower end of the connecting block II 2-1-9, and the lower end of the screw II 2-1-10 is in threaded fit with the threaded cylinder 2-1-11; the lower end of the threaded cylinder 2-1-11 is fixedly connected to an output shaft of the motor 2-1-12; the motors 2-1-12 are fixedly connected to the upper ends of the connecting blocks IV 2-1-14 through bolts; the fixed frame 2-1-5 and the motor bracket 2-1-7 are fixedly connected to the lower end of the storage cavity 1-3; the sliding block 2-1-1 and the support rod 2-1-2 are in sliding fit with the slideway 1-2;

each bookshelf body 2-2 comprises two groups of transmission devices, a fixed rod 2-2-1, a bidirectional motor II 2-2-7, a telescopic limiting rod 2-2-8 and a plurality of bearing devices 2-2-5; each group of transmission devices comprises a conveyor belt 2-2-6, two arc-shaped plates 2-2-9, two central shafts 2-2-11, two shading cloths 2-2-12, two movable rods I2-2-2, two movable rods II 2-2-3, four connecting pieces 2-2-4 and four connecting rods 2-2-10; one end of each of the four connecting rods 2-2-10 is fixedly connected to the fixed rod 2-2-1, and the other end of each of the four connecting rods 2-2-10 is connected to the corresponding movable rod I2-2-2 and the corresponding movable rod II 2-2-3 through hinges respectively; the two movable rods I2-2-2 and the two movable rods II 2-2-3 are sequentially connected end to end through four connecting pieces 2-2-4, and the two movable rods I2-2-2 are adjacent; the conveyor belts 2-2-6 are sleeved at the outer ends of the four connecting pieces 2-2-4, a plurality of grooves are formed in one sides of the conveyor belts 2-2-6 close to the connecting pieces 2-2-4, and round holes are formed in opposite surfaces of the conveyor belts 2-2-6 on the two groups of conveying devices; two ends of each bearing device 2-2-5 are respectively and fixedly connected in round holes on the conveyor belts 2-2-6 on the two groups of conveying devices; the lower end of the limiting telescopic rod 2-2-8 is fixedly connected to the fixed rod 2-2-1, and the upper end of the limiting telescopic rod 2-2-8 is fixedly connected with a bidirectional motor II 2-2-7; two output shafts of the two-way motors II 2-2-7 are respectively and fixedly connected to the side surfaces of the connecting pieces 2-2-4 positioned at the top of the two groups of conveying devices; each movable rod I2-2-2 is provided with an inner cavity, and a central shaft 2-2-11 is connected in the inner cavity through a reed; one end of each shading cloth 2-2-12 is wound on the central shaft 2-2-11, and the other end of each shading cloth 2-2-12 penetrates through the movable rod I2-2-2 and is fixedly connected with the corresponding arc-shaped plate 2-2-9;

the fixed rod 2-2-1 is fixedly connected to the upper end of the supporting rod 2-1-2, and the fixed rod 2-2-1 is in sliding fit with the slideway 1-2 and the groove 1-6.

The second embodiment is as follows: as shown in fig. 10, this embodiment is further described with respect to the first embodiment, wherein the conveyor belts 2-2-6 are under tension. Preventing the conveyor belt 2-2-6 from loosening and causing the books on the load bearing device 2-2-5 to fall off.

The third concrete implementation mode: as shown in fig. 12 and 13, the present embodiment is further described with respect to the first embodiment, wherein the fixing rod 2-2-1 includes a fixing rod main body 2-2-1-1 and two sets of rotating devices; each group of rotating devices comprises two circular rings 2-2-1-2; two stop blocks 2-2-1-3 are symmetrically arranged on each circular ring 2-2-1-2; two annular grooves are formed in the fixed rod main body 2-2-1-1, and two circular rings 2-2-1-2 on each group of rotating devices are in rotating fit with the corresponding annular grooves; the four connecting rods 2-2-10 on each group of transmission devices are respectively and fixedly connected to the stop blocks 2-2-1-3 on the two circular rings 2-2-1-2. The connecting rod 2-2-10 can rotate around the fixed rod main body 2-2-1-1 to further drive the movable rod I2-2-2 and the movable rod II 2-2-3 to move, so that when a student accidentally bumps on the device, impact can be reduced, and damage to the bump can be caused.

The fourth concrete implementation mode: as shown in fig. 12 and 13, in this embodiment, the first embodiment is further explained, the width of the stop 2-2-1-3 is greater than the thickness of the ring 2-2-1-2, and the central angle of the stop 2-2-1-3 is 45 °. The two stop blocks 2-2-1-3 can be restricted with each other, and the influence on the use of the bookshelf main body 2-2 caused by random rotation at 360 degrees is avoided.

The fifth concrete implementation mode: as shown in FIG. 14, the present embodiment is further described with respect to the first embodiment, each of the connecting members 2-2-4 includes a connecting housing 2-2-4-1, a gear 2-2-4-2, a rotating shaft I2-2-4-3, two connecting rollers 2-2-4-4, and two rotating shafts II 2-2-4-5; the top end of the connecting shell 2-2-4-1 is movably connected with a gear 2-2-4-2 through a rotating shaft I2-2-4-3, the lower end of the connecting shell 2-2-4-1 is symmetrically connected with two connecting rollers 2-2-4-4, and the connecting rollers 2-2-4-4 are movably connected with the lower end of the connecting shell 2-2-4-1 through a rotating shaft II 2-2-4-5; the gear 2-2-4-2 is meshed with the groove on the conveyor belt 2-2-6; the movable rod I2-2-2 and the movable rod II 2-2-3 are respectively connected to the lower ends of the corresponding connecting rollers 2-2-4-4. The gear 2-2-4-2 is used for driving the conveyor belt 2-2-6 and changing the direction of the conveyor belt 2-2-6, and the two connecting rollers 2-2-4-4 are used for enabling the movable rod I2-2-2 and the movable rod II 2-2-3 connected to the same connecting piece 2-2-4 to move independently without mutual influence.

The sixth specific implementation mode: as shown in fig. 15 and 16, this embodiment is further described as a first embodiment, and each of the load-bearing devices 2-2-5 includes a connecting rod 2-2-5-1, a housing 2-2-5-2, a limiting plate 2-2-5-5, a counterweight 2-2-5-6, two sliding plates 2-2-5-3, and two springs 2-2-5-7; the lower end of the shell 2-2-5-2 is fixedly connected with a balancing weight 2-2-5-6; the connecting rod 2-2-5-1 is connected to the shell 2-2-5-2 through a bearing, and two ends of the connecting rod 2-2-5-1 are fixedly connected into round holes in the side face of the conveyor belt 2-2-6; a placing groove 2-2-5-4 is formed in the top end of the shell 2-2-5-2; one end of each spring 2-2-5-7 is fixedly connected to the inner wall of the placing groove 2-2-5-4, and the other end of each spring 2-2-5-7 is fixedly connected with a corresponding sliding plate 2-2-5-3; the sliding plate 2-2-5-3 is in sliding fit with the placing groove 2-2-5-4; the limiting plate 2-2-5-5 is fixedly connected to the top end of the placing groove 2-2-5-4, and the limiting plate 2-2-5-5 is located at the upper end of the sliding plate 2-2-5-3. The function of the fiber board 2-2-5-5 is to prevent the sliding board 2-2-5-3 from separating from the working position; the sliding plates 2-2-5-3 can clamp the book, and the thinner book is prevented from falling off.

The seventh embodiment: as shown in fig. 17, this embodiment is further described as the first embodiment, two arc-shaped plates 2-2-9 on the opposite surfaces of the bookshelf 2 on the same side of two adjacent desks 1 are oppositely oriented and are in sliding fit.

The working principle of the invention is as follows: when the device is used, books are placed in the placing grooves 2-2-5-4 on the bearing devices 2-2-5, the books are placed between the two sliding plates 2-2-5-3, the books are prevented from falling off due to being too thin, the stacking height of the books on the desktop 1-1 can be effectively reduced, the sight of students and teachers is prevented from being blocked, the device is provided with the bearing devices 2-2-5, the books which are not informed can be conveniently placed in a separated mode, the students can conveniently find the books, and time is saved; when a book needs to be taken from the bearing device 2-2-5, the two-way motor II 2-2-7 on the corresponding bookshelf 2 is started, the output shaft of the two-way motor II 2-2-7 is fixedly connected with the rotating shaft I2-2-4-3, the two-way motor II 2-2-7 drives the rotating shaft I2-2-4-3 on the connecting piece 2-2-4 to rotate, and further drives the gear 2-2-4-2 to rotate, the gear 2-2-4-2 drives the conveyor belt 2-2-6 to rotate through the groove on the conveyor belt 2-2-6, the conveyor belt 2-2-6 drives the connecting rod 2-2-5-1 to move through the round hole on the side surface of the conveyor belt, the connecting rod 2-2-5-1 drives the shell 2-2-5-2 to move to the upper end, the student can take the book conveniently, and in the process of moving the shell 2-2-5-2, the lower end of the shell is provided with the balancing weight 2-2-5-6, so that the placing groove 2-2-5-4 is always upward, and the book is prevented from falling; when an anti-cheating function is required to be used in an examination, the two-way motor I2-1-8 and the motor 2-1-12 are started simultaneously, the two-way motor I2-1-8 drives the screw rod I2-1-6 to rotate, and further drives the connecting block II 2-1-9 to move towards the direction of the two-way motor I2-1-8, the connecting block II 2-1-9 drives the telescopic rod 2-1-3 to move, the motor 2-1-12 drives the threaded cylinder 2-1-11 to rotate, the threaded cylinder 2-1-11 moves upwards due to the fixation of the screw rod II 2-1-10, and further drives the motor 2-1-12 and the connecting block IV 2-1-14 to move, and finally drives the telescopic rod 2-1-3 to contract, the telescopic rod 2-1-3 is driven by the bidirectional motor I2-1-8 to move upwards, the telescopic rod 2-1-3 is contracted under the action of the motor 2-1-12, so that the bottom end of the telescopic rod 2-1-3 drives the connecting block III 2-1-13 to move upwards, further the sliding block 2-1-1 and the support rod 2-1-2 are driven to move upwards, the support rod 2-1-2 drives the fixed rod 2-2-1 to move upwards, the fixed rod 2-2-1 drives the bookshelf main body 2-2 to move upwards, finally the motor 2-1-12 and the bidirectional motor I2-1-8 are closed after the bookshelf main body 2-2-2 is moved to the position shown in figure 17, and at the moment, the movable rod I2-2-2 is positioned at the upper end of the, then the arc-shaped plate 2-2-9 on one transmission device on the bookshelf main body 2-2 is pulled out, so that the arc-shaped plate 2-2-9 is hooked with the arc-shaped plates 2-2-9 on the front and back adjacent devices, the shading cloth 2-2-12 is unfolded, then the two arc-shaped plates 2-2-9 on the other transmission device are hooked with each other, the sight line is blocked, and the phenomenon of left and right cheating is prevented.

It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

Claims

1. The utility model provides a middle school student is with preventing cheating desk which characterized in that: comprises a desk (1) and a bookshelf (2); the desk comprises a desk plate (1-1), a storage cavity (1-3), two movable plates (1-4) and two supports (1-7); the center of the bottom end of the table plate (1-1) is fixedly connected with a storage cavity (1-3), and two supports (1-7) are arranged on two sides of the storage cavity (1-3); the supports (1-7) are fixedly connected to the lower end of the table plate (1-1), and each support (1-7) is provided with a slide way (1-2); the table plate (1-1) is symmetrically provided with two notches (1-5), the bottom end of the table plate (1-1) is provided with two grooves (1-6), each groove (1-6) is communicated with the corresponding notch (1-5), and the grooves (1-6) are also communicated with the sliding grooves (1-2) on the corresponding supports (1-7); each movable plate (1-4) is connected to the table plate (1-1) through a hinge, and the movable plates (1-4) are in sliding fit with the notches (1-5);

the bookshelf (2) comprises a height adjusting device (2-1) and two bookshelf bodies (2-2); the height adjusting device (2-1) is fixedly connected to the lower end of the storage cavity (1-3); the two bookshelf main bodies (2-2) are symmetrically and fixedly connected to the height adjusting device (2-1);

the height adjusting device (2-1) comprises a motor bracket (2-1-7), a bidirectional motor (2-1-8) and two adjusting mechanisms; each adjusting mechanism comprises a sliding block (2-1-1), a support rod (2-1-2), a telescopic rod (2-1-3), a connecting block I (2-1-4), a fixing frame (2-1-5), a screw rod I (2-1-6), a connecting block II (2-1-9), a screw rod II (2-1-10), a threaded cylinder (2-1-11), a motor (2-1-12), a connecting block III (2-1-13) and a connecting block IV (2-1-14); the upper end of the sliding block (2-1-1) is fixedly connected with a supporting rod (2-1-2), and the side surface of the sliding block (2-1-1) is fixedly connected with a connecting block III (2-1-13); the fixed end of the telescopic rod (2-1-3) is connected to the upper end of the connecting block III (2-1-13) through a hinge, and the movable end of the telescopic rod (2-1-3) is connected to the lower end of the connecting block I (2-1-4) through a hinge; the connecting block I (2-1-4) is matched with the screw I (2-1-6) through threads; one end of the screw I (2-1-6) is connected to the fixed frame (2-1-5) through a bearing, and the other end of the screw I (2-1-6) is fixedly connected to an output shaft of the bidirectional motor (2-1-8); the bidirectional motor (2-1-8) is connected to the motor bracket (2-1-7) through a bolt; the connecting block II (2-1-9) is fixedly connected to the side face of the movable end of the telescopic rod; the connecting block IV is fixedly connected to the side face of the fixed end of the telescopic rod; the screw II (2-1-10) is fixedly connected to the lower end of the connecting block II (2-1-9), and the lower end of the screw II (2-1-10) is in threaded fit with the threaded cylinder (2-1-11); the lower end of the threaded cylinder (2-1-11) is fixedly connected to an output shaft of the motor (2-1-12); the motor (2-1-12) is fixedly connected to the upper end of the connecting block IV (2-1-14) through a bolt; the fixed frame (2-1-5) and the motor bracket (2-1-7) are fixedly connected to the lower end of the storage cavity (1-3); the sliding block (2-1-1) and the supporting rod (2-1-2) are in sliding fit with the slideway (1-2);

each bookshelf main body (2-2) comprises two groups of transmission devices, a fixed rod (2-2-1), a two-way motor II (2-2-7), a telescopic limiting rod (2-2-8) and a plurality of bearing devices (2-2-5); each group of transmission devices comprises a conveyor belt (2-2-6), two arc-shaped plates (2-2-9), two central shafts (2-2-11), two shading cloths (2-2-12), two movable rods I (2-2-2), two movable rods II (2-2-3), four connecting pieces (2-2-4) and four connecting rods (2-2-10); one end of each of the four connecting rods (2-2-10) is fixedly connected to the fixed rod (2-2-1), and the other end of each of the four connecting rods (2-2-10) is connected to the corresponding movable rod I (2-2-2) and the corresponding movable rod II (2-2-3) through hinges; the two movable rods I (2-2-2) and the two movable rods II (2-2-3) are sequentially connected end to end through four connecting pieces (2-2-4), and the two movable rods I (2-2-2) are adjacent; the conveyor belts (2-2-6) are sleeved at the outer ends of the four connecting pieces (2-2-4), a plurality of grooves are formed in one sides of the conveyor belts (2-2-6) close to the connecting pieces (2-2-4), and round holes are formed in opposite surfaces of the conveyor belts (2-2-6) on the two groups of conveying devices; two ends of each bearing device (2-2-5) are respectively and fixedly connected in circular holes on the conveyor belts (2-2-6) on the two groups of conveying devices; the lower end of the limiting telescopic rod (2-2-8) is fixedly connected to the fixing rod (2-2-1), and the upper end of the limiting telescopic rod (2-2-8) is fixedly connected with a bidirectional motor II (2-2-7); two output shafts of the two-way motor II (2-2-7) are respectively and fixedly connected to the side surfaces of the connecting pieces (2-2-4) of the two groups of conveying devices positioned at the top; each movable rod I (2-2-2) is provided with an inner cavity, and the inner cavity is connected with a central shaft (2-2-11) through a reed; one end of each shading cloth (2-2-12) is wound on the central shaft (2-2-11), and the other end of each shading cloth (2-2-12) penetrates through the movable rod I (2-2-2) and is fixedly connected with the corresponding arc-shaped plate (2-2-9);

the fixing rod (2-2-1) is fixedly connected to the upper end of the supporting rod (2-1-2), and the fixing rod (2-2-1) is in sliding fit with the slide way (1-2) and the groove (1-6).

2. The anti-cheating desk for middle school students according to claim 1, wherein: the conveyor belt (2-2-6) is under tension.

3. The anti-cheating desk for middle school students according to claim 2, wherein: the fixing rod (2-2-1) comprises a fixing rod main body (2-2-1-1) and two groups of rotating devices; each group of rotating devices comprises two circular rings (2-2-1-2); two stop blocks (2-2-1-3) are symmetrically arranged on each circular ring (2-2-1-2); two annular grooves are formed in the fixed rod main body (2-2-1-1), and two circular rings (2-2-1-2) on each group of rotating devices are in rotating fit with the corresponding annular grooves; the four connecting rods (2-2-10) on each group of transmission devices are respectively and fixedly connected to the stop blocks (2-2-1-3) on the two circular rings (2-2-1-2).

4. The anti-cheating desk for middle school students according to claim 3, wherein: the width of the stop block (2-2-1-3) is larger than the thickness of the circular ring (2-2-1-2), and the central angle corresponding to the stop block (2-2-1-3) is 45 degrees.

5. The anti-cheating desk for middle school students according to claim 1, wherein: each connecting piece (2-2-4) comprises a connecting shell (2-2-4-1), a gear (2-2-4-2), a rotating shaft I (2-2-4-3), two connecting rollers (2-2-4-4) and two rotating shafts II (2-2-4-5); the top end of the connecting shell (2-2-4-1) is movably connected with a gear (2-2-4-2) through a rotating shaft I (2-2-4-3), the lower end of the connecting shell (2-2-4-1) is symmetrically connected with two connecting rollers (2-2-4-4), and the connecting rollers (2-2-4-4) are movably connected with the lower end of the connecting shell (2-2-4-1) through a rotating shaft II (2-2-4-5); the gear (2-2-4-2) is meshed with the groove on the conveyor belt (2-2-6); the movable rod I (2-2-2) and the movable rod II (2-2-3) are respectively connected to the lower ends of the corresponding connecting rollers (2-2-4-4).

6. The anti-cheating desk for middle school students according to claim 1, wherein: each bearing device (2-2-5) comprises a connecting rod (2-2-5-1), a shell (2-2-5-2), a limiting plate (2-2-5-5), a balancing weight (2-2-5-6), two sliding plates (2-2-5-3) and two springs (2-2-5-7); the lower end of the shell (2-2-5-2) is fixedly connected with a balancing weight (2-2-5-6); the connecting rod (2-2-5-1) is connected to the shell (2-2-5-2) through a bearing, and two ends of the connecting rod (2-2-5-1) are fixedly connected to the round holes in the side face of the conveyor belt (2-2-6); a placing groove (2-2-5-4) is arranged at the top end of the shell (2-2-5-2); one end of each spring (2-2-5-7) is fixedly connected to the inner wall of the placing groove (2-2-5-4), and the other end of each spring (2-2-5-7) is fixedly connected with a corresponding sliding plate (2-2-5-3); the sliding plate (2-2-5-3) is in sliding fit with the placing groove (2-2-5-4); the limiting plate (2-2-5-5) is fixedly connected to the top end of the placing groove (2-2-5-4), and the limiting plate (2-2-5-5) is located at the upper end of the sliding plate (2-2-5-3).

7. The anti-cheating desk for middle school students according to claim 1, wherein: the two arc-shaped plates (2-2-9) on the opposite surfaces of the bookshelf (2) on the same side of the two adjacent desks (1) face opposite directions and are in sliding fit.