CN114664129B

CN114664129B - Multimedia teaching device based on computer technology

Info

Publication number: CN114664129B
Application number: CN202210425302.8A
Authority: CN
Inventors: 刘晓飞
Original assignee: Anqing Normal University
Current assignee: Hefei Houtu Digital Culture Co ltd; Hefei Minglong Electronic Technology Co ltd
Priority date: 2022-04-22
Filing date: 2022-04-22
Publication date: 2023-05-12
Anticipated expiration: 2042-04-22
Also published as: CN114664129A

Abstract

The invention discloses a multimedia teaching device based on computer technology, which belongs to the technical field of computer technology teaching devices, and comprises: the teaching display screen, set up the supporting box of teaching display screen below, teaching display screen one side is provided with the support, and leg joint has interesting teaching mechanism, interesting teaching mechanism includes: the driving unit is used for driving the teaching display screen to rotate; the assembly teaching unit is used for enabling a plurality of groups of computer assembly parts to sequentially fall into the workpiece taking groove. According to the technical scheme, the interesting teaching mechanism is arranged, the teaching display screen can be driven to rotate to a longitudinal state through the driving unit, so that the supporting box is divided into two groups of teaching areas, students can select the teaching areas and answer the problem presented by a teacher through pressing the switch, interaction between the teacher and the students is achieved, learning interest of the students is improved, attention of the students is brought to, and influence of the students on computer technical knowledge is deepened.

Description

Multimedia teaching device based on computer technology

Technical Field

The invention relates to the technical field of computer technology teaching devices, in particular to a multimedia teaching device based on a computer technology.

Background

The content of computer technology is very broad and can be roughly divided into computer system technology, computer device technology, computer component technology, and computer assembly technology.

At present, most of multimedia teaching devices based on computer technology adopt teaching display screens to play teaching materials, teaching videos and the like, and then explain the teaching materials to achieve the purpose of teaching, but the mode not only limits interaction between the teacher and students, but also enables the students to easily generate mind of anaerobic study due to boring sense, and cannot draw attention and learning interest of the students, thereby being unfavorable for teaching and learning. For this purpose, we propose a multimedia teaching device based on computer technology.

Disclosure of Invention

The invention aims to provide a multimedia teaching device based on computer technology, so as to solve the problems in the background technology.

In order to achieve the above purpose, the present invention provides the following technical solutions: a multimedia teaching apparatus based on computer technology, comprising: the teaching display screen, set up the supporting box of teaching display screen below, teaching display screen one side is provided with the support, and leg joint has interesting teaching mechanism, interesting teaching mechanism includes:

the driving unit is connected with the bracket and used for driving the teaching display screen to rotate;

the equipment teaching unit, the equipment teaching unit is two sets of, two sets of equipment teaching unit arranges the supporting box inner chamber both sides respectively in, the equipment teaching unit includes the locating plate of being connected with drive unit, be provided with the loading seat on the locating plate, set up the opening with the loading seat adaptation on the supporting box, get a groove has been seted up to the outside one end of loading seat, get an extension groove that is linked together has been seted up to one side inner wall in groove, extension groove tank bottom is provided with telescopic equipment, and telescopic equipment output is connected with the shrouding with extension groove adaptation, a plurality of groups computer equipment parts have been placed to the position of just arranging the shrouding opposite side in the extension inslot, equipment teaching unit is used for making a plurality of groups computer equipment parts drop to get a inslot in proper order.

The driving unit comprises a bearing seat connected with a bracket, the bearing seat movably penetrates through the supporting box, the bottom of the bearing seat is connected with a driving shaft, the bottom of the driving shaft is rotationally connected with the inner wall of the bottom of the supporting box, a driving device is mounted on the inner wall of one side of the supporting box through a mounting frame, and the driving device is in transmission connection with the driving shaft through a gear set.

The further improvement lies in, the locating plate is kept away from one side both ends of loading seat and is all connected with the supporting box inner wall through supporting the telescopic link, two sets of be provided with between the supporting telescopic link with the fixed double-screw bolt of locating plate, double-screw bolt outer wall thread bush is equipped with the screw sleeve, and screw sleeve bottom and supporting box inner wall rotate to be connected, drive shaft and two sets of screw sleeve pass through sprocket drive group transmission and are connected.

The utility model provides a support box, including supporting box, support seat, support box both sides inner wall and place the position of bearing the seat below all symmetry is provided with the stopper, it is provided with the contact block to bear the seat bottom, two sets of the stopper is located the contact block along with bear seat pivoted route, one side of stopper be provided with contact block complex touch close button, touch close button electric connection drive arrangement, two sets of stopper is used for fixing a position the rotation state of teaching display screen.

The utility model provides a loading seat, locating plate, supporting box, photoelectric sensor, supporting box, still improvement lie in, loading seat keep away from one side of locating plate be provided with the shrouding of opening adaptation, the locating plate also with opening looks adaptation, be provided with in the opening and supply the spacing chimb that loading seat worn out, spacing chimb is rectangular frame form, be in the position between two sets of openings on the supporting box and be provided with two sets of switches, two sets of switch one respectively electric connection both sides telescopic device, get a groove one side inner wall and be provided with photoelectric sensor, photoelectric sensor electric connection telescopic device.

The LED lamp strip is characterized in that the LED lamp strip is embedded in the outer wall of the sealing plate, a reminding device is arranged at one end of the outer side of the sealing plate, work tables are fixedly embedded in two sides of the top of the supporting box, the work tables are arranged on the outer side of the through hole, a second switch is arranged at one end of the outer side of the work tables, and the second switch is electrically connected with the reminding device and the LED lamp strip.

The further improvement lies in, support one side outer wall on the teaching display screen is provided with the protection unit, the protection unit includes:

the installation seat, the rotation of installation seat sets up the roller, and roller one end activity runs through installation seat one side, and the outer wall winding of roller has the protection curtain, the protection curtain has a loose end, the loose end of protection curtain extends to the teaching display screen and keeps away from a side top of support and connect the counter weight board.

A further improvement is that the protection unit further comprises:

the annular tooth seat is fixedly arranged on the supporting box and is arranged on the outer side of the bearing seat, and the annular tooth seat and the bearing seat are coaxial;

one end of the transmission rod penetrates through the bottom of the supporting shell and is fixedly sleeved with a transmission gear meshed with the annular tooth seat, an auxiliary rod is movably inserted into the outer wall of one side of the supporting shell, and one end of the auxiliary rod is in transmission connection with the other end of the transmission rod through a bevel gear set;

the other end of the auxiliary rod is wound with a pull rope, the pull rope is provided with a connecting end, the connecting end of the pull rope is connected with the outer wall of the roll shaft, and an elastic reset piece is arranged at the joint of the roll shaft and the mounting seat.

In summary, the application discloses a multimedia teaching device based on computer technology.

According to the technical scheme, the interesting teaching mechanism is arranged, the teaching display screen can be driven to rotate to the longitudinal state through the driving unit, the supporting box is divided into two groups of teaching areas, meanwhile, the teaching display screen is enabled to move upwards synchronously when rotating to the longitudinal state, the assembled teaching unit is respectively located in the two groups of teaching areas, students can select the teaching areas and answer questions presented by teachers through pressing the switch, after answering correctly, the teacher can control corresponding telescopic equipment through the switch, the computer assembly parts used for assembling can fall out in the piece taking groove, the computer assembly parts can be assembled by subsequent students, interaction between the teacher and the students is achieved, learning interest of the students is improved, attention of the students is brought to, influence of the students on computer technical knowledge is deepened, meanwhile, the protection unit is arranged, the auxiliary rod rotates to release a pull rope, and under the effect of the elastic reset piece, shielding protection is provided for the teaching display screen, accidental damage to the teaching display screen is avoided when the students are assembled, and the service life of the multimedia teaching device is prolonged.

Drawings

FIG. 1 is a perspective view of a multimedia teaching apparatus based on computer technology according to the present invention;

FIG. 2 is a cross-sectional view of a multimedia teaching apparatus based on computer technology according to the present invention;

FIG. 3 is a perspective view showing the structure of a driving unit in the multimedia teaching apparatus based on the computer technology according to the present invention;

FIG. 4 is a perspective view showing the structure of an assembled teaching unit in the multimedia teaching device based on the computer technology;

fig. 5 is a perspective view showing a structure of a protection unit in the multimedia teaching apparatus based on the computer technology.

In the figure: 1. a teaching display screen; 2. a supporting box; 21. a limit convex edge; 22. a first switch; 23. a work table; 24. a second switch; 3. a fun teaching mechanism; 31. a driving unit; 311. a bearing seat; 312. a drive shaft; 313. a limiting block; 314. a gear set; 315. a stud; 316. a driving device; 317. touching a closing button; 318. a sprocket drive set; 319. a telescopic rod; 32. assembling a teaching unit; 321. a loading seat; 322. a positioning plate; 323. a sealing plate; 324. a piece taking groove; 325. a photoelectric sensor; 326. an extension groove; 327. LED light bar; 328. a reminding device; 33. a protection unit; 331. an annular tooth holder; 332. a transmission rod; 333. a bevel gear set; 334. a pull rope; 335. a mounting base; 336. a protective curtain.

Detailed Description

The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

Example 1

Referring to fig. 1, a multimedia teaching device based on computer technology includes a teaching display screen 1 for playing teaching data or teaching video, wherein the teaching display screen 1 is arranged on an interesting teaching mechanism 3, and the interesting teaching mechanism 3 is arranged in a supporting box 2 for improving the interest of students in learning computer technology;

the teaching display screen 1 is provided with a bracket on one side and is connected with the interesting teaching mechanism 3, the shape of the supporting box 2 is preferentially rectangular, the bottom of the supporting box 2 can be provided with a caster assembly (not shown in the figure) in the prior art to move, the details are not described in detail herein, meanwhile, one side of the supporting box is also provided with a box door (not shown in the figure) in a detachable manner so as to maintain the structure inside the supporting box 2, as shown in fig. 1, the teaching display screen 1 is specifically arranged above the supporting box 2 in a transverse state in the central position, when the teaching display screen 1 rotates to a longitudinal state through a driving unit 31, the top surface of the supporting box 2 can be separated to form two groups of teaching areas, as shown in fig. 5, two sides of the top surface of the supporting box 2 are provided with through holes communicated with the inner cavity of the supporting box 2, the through holes are used for assembling the interesting teaching mechanism 3 which is described in detail herein, two groups of switches 22 are arranged at the positions between the through holes on the top surface of the supporting box 2, and the switches 22 are used for controlling equipment in the assembling teaching unit 32 which is described in detail herein, and the telescopic switches which are not described in detail in the prior art;

further, as shown in fig. 5, a rectangular frame-shaped limit flange 21 is provided on the inner wall of the opening, the limit flange 21 can make the loading seat 321 in the assembly teaching unit 32 pass in/out, the seal plate 323 and the locating plate 322 are adapted to the opening, and cannot pass in/out the limit flange 21, when one side of the seal plate 323 contacts with the top surface of the limit flange 21, the other side of the seal plate 323 is horizontal with the top surface of the supporting box 2, so as to ensure that teaching tools and the like can be normally placed on the top surface of the supporting box 2 when the assembly teaching unit 32 is not needed, a workbench 23 is fixedly embedded at positions on both sides of the top surface of the supporting box 2 and outside the opening, students can perform assembly operation on multiple groups of obtained computer assembly parts on the workbench 23, and a switch two 24 is provided at one end of the outer side of the workbench 23;

it should be noted that, the first switch 22 independently controls the telescopic device in the first assembled teaching unit 32, the second switch 24 independently controls the reminding device 328 and the LED light bar 327 in the first assembled teaching unit 32, for example, when students in the left teaching area answer the teacher question, the second switch 24 in the teaching area is pressed, so that the reminding device 328 and the LED light bar 327 in the teaching area can be opened, and when students in the teaching area answer correctly, the teacher presses the first switch 22 corresponding to the teaching area, so that the telescopic device in the teaching area can be controlled to work;

further, as shown in fig. 2, the interesting teaching mechanism 3 includes a driving unit 31 connected to the bottom end of the support, where the driving unit 31 is used to drive the teaching display screen 1 to rotate to a horizontal state/a vertical state and simultaneously drive the assembled teaching unit 32 to move upwards/downwards synchronously, that is, when the driving unit 31 makes the teaching display screen 1 gradually rotate from the horizontal state to the vertical state, the assembled teaching unit 32 gradually moves upwards, and when the teaching display screen 1 rotates to the vertical state, one side of the positioning plate 322 is attached to one side of the limiting flange 21, and one side of the positioning plate is used to face one side of the teaching area when the teaching display screen 1 rotates to the vertical state, so as to avoid damage to one side of the teaching display screen 1 used to display the picture when the students assemble, and a protecting unit 33 is disposed on one side of the support to provide shielding protection to one side of the display picture of the teaching display screen 1.

Example 2

As shown in fig. 3, the driving unit 31 includes a bearing seat 311 fixed to the bottom end of the support and a driving shaft 312 fixedly connected to the bottom of the bearing seat 311, where the bearing seat 311 is preferably circular and penetrates through the top surface of the supporting box 2, and a bearing can be disposed at a connection position between the bearing seat 311 and the supporting box 2 so that the driving shaft 312 drives the bearing to rotate, the other end of the driving shaft 312 is rotatably connected to the inner wall of the bottom of the supporting box 2 through the bearing, a driving device 316 is mounted on the inner wall of one side of the supporting box 2 through a mounting frame, and the driving device 316 and the driving shaft 312 are in transmission connection through a gear set 314;

alternatively, the driving device 316 includes a servo motor and a speed reducer, where the gear set 314 includes two sets of gears, and in actual situations, the two sets of gears are respectively sleeved on the driving shaft 312 and the output end of the driving device 316;

further, both sides of the inner wall of the bottom of the supporting box 2 are respectively provided with a threaded sleeve through bearings in a rotating way, one end of a stud 315 is inserted into the top surface of the threaded sleeve in a threaded way, the stud 315 moves upwards/downwards when the threaded sleeve rotates, so that the assembly teaching unit 32 is driven to move, specifically, the other end of the stud 315 is fixedly connected with the bottom of the assembly teaching unit 32, meanwhile, a driving shaft 312 is in transmission connection with two sets of threaded sleeves through a sprocket transmission group 318, and the sprocket transmission group 318 comprises a plurality of sets of sprockets and chains, so that the driving shaft 312 can drive the two sets of threaded sleeves to synchronously and reversely rotate when rotating;

furthermore, in order to ensure the accuracy of the stable teaching display screen 1 when rotating from the horizontal state to the vertical state, as can be seen from fig. 3, the limiting blocks 313 are symmetrically arranged at two sides below the bearing seat 311, the bottom of the bearing seat 311 is fixedly provided with the contact blocks, the contact blocks move between the two groups of limiting blocks 313 along with the bearing seat 311, the two groups of limiting blocks 313 limit the rotation degree to be 0-180 degrees, when the contact blocks contact one group of limiting blocks 313, the teaching display screen 1 is in the horizontal state at the moment, and when the contact blocks contact the other group of limiting blocks 313, the teaching display screen 1 is in the vertical state at the moment;

wherein, one side of the two groups of limiting blocks 313 is provided with a touch closing button 317 matched with the contact blocks, the touch closing button 317 is electrically connected with the driving device 316 and used for controlling the driving device 316 to be closed, and when the contact blocks contact the limiting blocks 313, the touch closing button 317 is contacted simultaneously, so that the touch closing button 317 controls the driving device 316 to be closed, and the driving device 316 is prevented from continuously working, thereby damaging the internal structure.

Example 3

As shown in fig. 3-4, the assembly teaching unit 32 includes a positioning plate 322 fixed to the top of the stud 315, a loading seat 321 disposed on the top of the positioning plate 322 and capable of penetrating out of the inner side of the limiting flange 21, and a sealing plate 323 disposed on the top of the loading seat 321 and adapted to the through hole;

in order to ensure that the stud 315 stably drives the assembly teaching unit 32 to move, telescopic rods 319 are arranged at two ends of the bottom surface of the positioning plate 322, and the other ends of the telescopic rods 319 are connected with the inner wall of the bottom of the supporting box 2;

further, a piece taking groove 324 is formed at one end of the outer side of the loading seat 321, a photoelectric sensor 325 is arranged on the inner wall of the top of the piece taking groove 324, an extending groove 326 which is communicated with the inner wall of the side part of the piece taking groove 324 is formed, a telescopic device (not shown in the figure) is arranged at the bottom of the extending groove 326, the output end of the telescopic device is connected with a push plate (not shown in the figure) which is matched with the extending groove 326, a plurality of groups of different computer assembly parts are placed on one side of the push plate facing the piece taking groove 324 along a linear array, the plurality of computer assembly parts can be assembled together, the limitation is not made, the telescopic device is electrically connected with a first switch 22, when in use, a teacher asks questions, the student for answering, and the student teacher for answering drives the push plate to move by pressing the first switch 22 corresponding to the telescopic device, and the push plate enables a group of computer assembly parts to drop into the piece taking groove 324 for the student to take;

wherein, the photoelectric sensor 325 can adopt a QS1815 photoelectric sensor for sensing whether the computer assembly part is in the picking groove 324, when sensing that the computer assembly part is in the picking groove 324, the photoelectric sensor 325 controls the telescopic device to be closed, and the telescopic device can adopt an electric telescopic rod or an electrohydraulic push cylinder and the like;

furthermore, a reminding device 328 is disposed at one end of the top surface of the sealing plate 323, a plurality of groups of LED light bars 327 are embedded in the outer wall of the sealing plate 323, the reminding device 328 and the LED light bars 327 are electrically connected with the second switch 24, after a teacher asks questions, students can trigger the LED light bars 327 and the reminding device 328 to answer by pressing the second switch 24, and the reminding device 328 belongs to the prior art and is not described in detail herein.

Example 4

As shown in fig. 4, the protection unit 33 includes an annular tooth holder 331 disposed on the top surface of the supporting case 2 and coaxial with the bearing seat 311, a supporting shell is disposed on the outer wall of one side of the support, a transmission rod 332 penetrates through the bottom of the supporting shell, the transmission rod 332 is disposed inside the annular tooth holder 331, one end of the transmission rod 332 is engaged with the annular tooth holder 331 through a transmission gear, an auxiliary rod is inserted on one side of the supporting shell, one end of the auxiliary rod is engaged with the other end of the transmission rod 332 through a bevel gear set 333, the bevel gear set 333 is two sets of bevel gears engaged with each other, a U-shaped mounting seat 335 is disposed on the top of one side of the teaching display screen 1 facing the support, a roller shaft is rotatably disposed in the mounting seat 335, an elastic reset member (such as a torsion spring) is disposed at the joint of the roller shaft and the mounting seat 335, the other end of the auxiliary rod is wound with a pull rope 334, the connection end of the pull rope 334 is connected with the outer wall of the roller shaft, a protection curtain 336 is wound on the outer wall of the roller shaft, the protection curtain 336 has a movable end, and the movable end of the protection curtain 336 extends to the top of the other side of the teaching display screen 1 and is connected with a counterweight plate;

when teaching display screen 1 rotates to vertical state from horizontal state, drive gear and annular toothholder 331 cooperation for transfer line 332 rotates, and the auxiliary rod rotates under the drive of bevel gear group 333 this moment, and the rotatory stay 334 of unreeling of auxiliary rod, and the elastic reset piece drives the roller and resets and rotate the protection curtain 336 of unreeling this moment, under the effect of counter weight board, and protection curtain 336 is covered in the one side that teaching display screen 1 is used for the demonstration picture by unreeling department gradually.

To sum up, the working principle of the multimedia teaching device based on the computer technology is as follows: when in use, the electrical components in the application are connected with an external power supply through wires, data or images related to computer technology are played through the teaching display screen 1 to teach students, the teaching display screen 1 is rotated from a transverse state to a longitudinal state through the opening of the driving device 316, the students select a teaching area, then the driving device 316 is opened, the driving shaft 312 is rotated through the gear set 314, the chain wheel transmission group 318 rotates the threaded sleeve, the screw drives the assembled teaching unit 32 to be upward, the loading seat 321 is positioned in the teaching area, the contact block touches the touch closing button 317 when contacting the contact block with the group of limiting blocks 313, the driving device 316 is closed at the moment, meanwhile, when the teaching display screen 1 is rotated, the transmission gear and the annular tooth seat 331 are matched to enable the transmission rod 332 to rotate, and the auxiliary rod is enabled to rotate through the cone gear set 333, the auxiliary rod rotates to unwind the pull rope 334, the roll shaft resets and rotates to unwind the protective curtain 336 under the action of the elastic resetting piece, the protective curtain 336 is gradually covered on one side of the teaching display screen 1 by the unwinding part under the action of the weight plate, a teacher gives questions to students in two groups of teaching areas, when the students answer questions, the students can press the switch II 24 to trigger the reminding device 328 and the LED lamp bar 327 to answer questions, after the answers are correct, the teacher can press the switch I22 on the corresponding side of the students, so that the telescopic equipment drives the push plate to move, a group of computer assembly parts drop into the fetching groove 324, the photoelectric sensor 325 controls the telescopic equipment to be closed after sensing, the operation is repeated until the students obtain all computer assembly parts in the extending groove 326, and after the students obtain all computer assembly parts, the assembly operation can be carried out on the workbench 23, the teacher can rewards students assembled first, so that the interest of the students in computer technology learning is improved, and learning quality can be improved.

Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. A multimedia teaching apparatus based on computer technology, comprising: the teaching display screen (1), set up supporting box (2) of teaching display screen (1) below, teaching display screen (1) one side is provided with the support, and leg joint has taste teaching mechanism (3), its characterized in that: the interesting teaching mechanism (3) comprises:

the driving unit (31) is connected with the bracket and used for driving the teaching display screen (1) to rotate;

the assembling teaching units (32), the two groups of assembling teaching units (32) are respectively arranged at two sides of the inner cavity of the supporting box (2), the assembling teaching units (32) comprise positioning plates (322) connected with the driving units (31), loading bases (321) are arranged on the positioning plates (322), through holes matched with the loading bases (321) are formed in the supporting box (2), a piece taking groove (324) is formed in one end of the outer side of the loading bases (321), an extending groove (326) communicated with the inner wall of one side of the piece taking groove (324) is formed, telescopic equipment is arranged at the bottom of the extending groove (326), sealing plates (323) matched with the extending groove (326) are connected to the output ends of the telescopic equipment, a plurality of groups of computer assembling parts are placed in the positions of the other sides of the extending groove (326), and the plurality of groups of computer assembling parts are sequentially dropped into the piece taking groove (324) through the assembling teaching units (32);

the driving unit (31) comprises a bearing seat (311) connected with a bracket, the bearing seat (311) movably penetrates through the supporting box (2), a driving shaft (312) is connected to the bottom of the bearing seat (311), the bottom of the driving shaft (312) is rotationally connected with the inner wall of the bottom of the supporting box (2), a driving device (316) is mounted on the inner wall of one side of the supporting box (2) through a mounting frame, and the driving device (316) is in transmission connection with the driving shaft (312) through a gear set (314);

the two ends of one side of the positioning plate (322) far away from the loading seat (321) are connected with the inner wall of the supporting box (2) through supporting telescopic rods (319), two groups of studs (315) fixed with the positioning plate (322) are arranged between the supporting telescopic rods (319), threaded sleeves are sleeved on the outer wall of each stud (315) in a threaded mode, the bottom ends of the threaded sleeves are rotatably connected with the inner wall of the supporting box (2), and the driving shaft (312) is in transmission connection with the two groups of threaded sleeves through chain wheel transmission groups (318);

limiting blocks (313) are symmetrically arranged on the inner walls of two sides of the supporting box (2) and are arranged at positions below the bearing seat (311), contact blocks are arranged at the bottom of the bearing seat (311), two groups of limiting blocks (313) are positioned on a path along which the contact blocks rotate along with the bearing seat (311), a touch closing button (317) matched with the contact blocks is arranged on one side of each limiting block (313), the touch closing button (317) is electrically connected with a driving device (316), and the two groups of limiting blocks (313) are used for positioning the rotation state of the teaching display screen (1);

a sealing plate (323) matched with the through hole is arranged on one side, far away from the positioning plate (322), of the loading seat (321), the positioning plate (322) is also matched with the through hole, a limiting convex edge (21) which can be used for the loading seat (321) to penetrate out is arranged in the through hole, the limiting convex edge (21) is in a rectangular frame shape, two groups of first switches (22) are arranged at positions, located between the two groups of through holes, on the supporting box (2), the two groups of first switches (22) are electrically connected with two side telescopic devices respectively, a photoelectric sensor (325) is arranged on the inner wall on one side of the pickup groove (324), and the photoelectric sensor (325) is electrically connected with the telescopic devices;

the LED lamp strip (327) is embedded in the outer wall of the sealing plate (323), a reminding device (328) is arranged at one end of the outer side of the sealing plate (323), the workbench (23) is fixedly embedded in two sides of the top of the supporting box (2), the workbench (23) is arranged on the outer side of the through opening, a switch II (24) is arranged at one end of the outer side of the workbench (23), and the switch II (24) is electrically connected with the reminding device (328) and the LED lamp strip (327);

the outer wall of one side of the support on the teaching display screen (1) is provided with a protection unit (33), and the protection unit (33) comprises:

the installation seat (335), the roller is rotationally arranged in the installation seat (335), one end of the roller movably penetrates through one side of the installation seat (335), the protective curtain (336) is wound on the outer wall of the roller, the protective curtain (336) is provided with a movable end, and the movable end of the protective curtain (336) extends to the top of one side, far away from the bracket, of the teaching display screen (1) and is connected with the counterweight plate;

the protection unit (33) further comprises:

the annular tooth holder (331) is fixedly arranged on the supporting box (2) and is arranged on the outer side of the bearing seat (311), and the annular tooth holder (331) and the bearing seat (311) are coaxial;

the transmission rod (332), one end of the transmission rod (332) penetrates through the bottom of the supporting shell and is fixedly sleeved with a transmission gear meshed with the annular tooth seat (331), an auxiliary rod is movably inserted into the outer wall of one side of the supporting shell, and one end of the auxiliary rod is in transmission connection with the other end of the transmission rod (332) through the bevel gear set (333);

the other end of auxiliary rod is convoluteed and is had stay cord (334), stay cord (334) have a link, the link and the roller outer wall connection of stay cord (334), the junction of roller and mount pad (335) is provided with the elasticity piece that resets.