CN111202353A

CN111202353A - Computer teaching desk

Info

Publication number: CN111202353A
Application number: CN201811394851.3A
Authority: CN
Inventors: 李泓胜
Original assignee: Liaoning Hongxin Technology Achievement Transformation Service Co ltd
Current assignee: Liaoning Hongxin Technology Achievement Transformation Service Co ltd
Priority date: 2018-11-22
Filing date: 2018-11-22
Publication date: 2020-05-29

Abstract

A computer teaching desk relates to a teaching aid, wherein a display storage box (6) is arranged between a storage box and a computer case placing box which are respectively arranged at two sides of the lower end of a desktop plate of a desk body (1), a threaded hole (8) penetrating the interior is formed in the middle of a bottom plate of the storage box (6), and a screw rod (31) is spirally twisted in the threaded hole (8); the computer can be rapidly and effectively retracted, and the rotation of the display is realized during teaching, so that a teacher can clearly and directly know the study concentration condition of students during computer teaching demonstration, the students can conveniently observe specific operation steps, and the teaching effect of computer teaching can be effectively improved; meanwhile, the problem that the existing computer classroom has great potential safety hazard due to disordered wire placement is solved, and great convenience is provided for the maintenance and the use of the computer.

Description

Computer teaching desk

Technical Field

The invention relates to a teaching aid, in particular to a computer teaching desk.

Background

The computer is commonly called as computer, is a modern electronic computing machine for high-speed computation, can perform numerical computation and logic computation, and also has the function of storage and memory. With the development of science and technology, computers have gradually entered into our lives, and students and workers can often use the computers. Computer courses are gradually used in teaching practice, and are an essential course for high school at first.

The computer desk that the teacher of school's computer lab used is ordinary computer desk mostly, and area is big, when not being convenient for manage, also is in many problems in practice class teaching, makes computer teaching not reach good effect. At present, in the teaching aid, the table for placing the computer still has some problems, as follows:

1. in computer practice class, when the teacher demonstrates the operation, computer display is towards teacher oneself, and the display can not rotate, can't be towards the student, and the student can not see, and teaching demonstration effect is poor, researches a device that can assist computer teaching, and service teaching that can be better improves computer teaching quality.

2. When the teacher explains, the teacher always faces the display to operate, and the learning and listening states of the students cannot be seen. When the teacher is not paying attention to the computer, part of students can shield the sight of the teacher from playing the mobile phone, speaking and sleeping, so that the teaching time can not be reasonably utilized, the study of the students is not facilitated, and the computer teaching can not obtain a good teaching effect.

3. The computer in the computer room is exposed for a long time without any protection device, the case and the display can easily adsorb dust, the daily cleaning is not convenient, and the service life of the computer is reduced.

4. The keyboard is placed for a long time and is in an exposed state, no protective device is arranged, the computer keyboard can easily adsorb dust, and the dust at the gaps of the keys in the structural arrangement of the keyboard is very difficult to clean, so that the service life of the keyboard is shortened.

5. The existing desk cannot be clamped and limited, so that the computer cannot be fixed, the desk is easy to detach and even damage by students, and the desk can be stolen to cause resource loss; the display, keyboard and mouse are easy to fall off, so that resource loss is caused, and management is inconvenient.

6. The computer desk used in the existing computer room is space-saving, is basically designed in a common double-computer-position square shape, can not be used for placing books, has no position for writing, and easily forgets steps due to complex operation in some courses, thereby influencing the teaching quality.

7. Computer winding displacement at the bottom of the computer room table is very mixed and disorderly, and a circuit is easily touched in the daily use process to cause the computer to be restarted or halted, so that inconvenience is brought to the computer teaching. The power supply is inserted and arranged on the ground, which is very unsafe and brings inconvenience to the ground cleaning of the computer room.

At present, a device capable of solving the problems does not exist, and a device capable of assisting computer teaching is urgently needed, and has certain practical value and economic value.

Disclosure of Invention

In order to overcome the defects in the background art, the invention discloses a computer teaching table, which can quickly and effectively fold and unfold a computer and simultaneously realize the rotation of a display during teaching, so that a teacher can clearly and directly know the study concentration condition of students during the computer teaching demonstration, the students can conveniently observe specific operation steps, and the teaching effect of the computer teaching can be effectively improved; meanwhile, the problem that the existing computer classroom has great potential safety hazard due to disordered wire placement is solved, and great convenience is provided for the maintenance and the use of the computer.

The technical scheme for realizing the invention is as follows:

a computer teaching desk comprises a desk body, a display storage box is arranged between a storage box and a computer case placing box which are respectively arranged on two sides of the lower end of a desktop plate of the desk body, a threaded hole penetrating the interior is formed in the middle of a bottom plate of the storage box, a screw rod is spirally wound in the threaded hole, the upper end of the screw rod is connected with a lifting plate placed in the storage box through a bearing, U-shaped fixing frames are respectively movably connected on two sides of the upper surface of the lifting plate through lifting rods, a positioning clamping plate is arranged between the U-shaped fixing frames on two sides of the upper surface of the lifting plate, a circular opening opposite to the lifting plate is arranged on a panel of the desk body at the upper end of the storage box, an annular sliding groove is formed in the lower wall surface of the circular opening, a plurality of sliding blocks are movably clamped in the sliding groove, and each sliding block is respectively connected with a threading ring, deposit the case and be equipped with the side groove on the side that the quick-witted case standing groove links to each other the interior curb plate in side groove on be equipped with the several through wires hole of depositing the incasement chamber of seeing through of vertical arrangement the upper and lower end of several through wires hole side frame be equipped with the fore-and-aft respectively several through wires hole opposite side frame be equipped with the socket insert and press the spring solidus board.

The computer teaching desk is characterized in that a sealing plate is arranged on the front surface of the storage box and is of a detachable structure, through holes corresponding to each threaded hole in the front frame of the storage box are formed in the periphery of a panel of the sealing plate respectively, and each screw penetrates through each through hole and is screwed in each threaded hole to fix the sealing plate.

The computer teaching table is characterized in that the lifting plate is of a circular structure, a bearing is embedded in the middle of the lower surface of the lifting plate, the upper portion of the screw rod is inserted into the bearing, the lifting plate rotates by taking the screw rod as a central fulcrum, and a rotating handle is arranged outside the screw rod.

The computer teaching desk is characterized in that the lifting rod is inserted into a bearing embedded in the middle of the lower surface of the U-shaped fixing frame, and a rotating handle is arranged at the bottom of the lifting rod.

The computer teaching desk is characterized in that spring pressing plates of pressing structures are respectively arranged on two sides of the positioning clamping plate, and the spring pressing plates on the two sides are respectively pressed and clamped on two sides of the display base;

the computer teaching desk is characterized in that push-type spring locks are respectively embedded at the front end and the rear end of the upper surface of the lifting plate, and a lock head of each push-type spring lock extends and retracts from the front wall surface and the rear wall surface of the lifting plate respectively; the front and rear inner wall surfaces of the round opening are respectively provided with side locking openings matched with the locking heads of the press type spring locks, and the locking head of each press type spring lock is respectively inserted into the corresponding side locking opening, so that the fixing of the lifting plate can be realized.

The computer teaching table is characterized in that a keyboard placing groove is formed in the lower side of a round opening in the table body, a buckling plate hinged to the keyboard placing groove is arranged on the keyboard placing groove, a pressing type buckle matched with the keyboard placing groove is arranged on the front side of the lower surface of the buckling plate, and a key cap cleaning device is arranged in the keyboard placing groove.

The computer teaching desk is characterized in that the keycap cleaning device comprises a grab handle and an inverted U-shaped plate, the grab handle is arranged on the upper portion of the inverted U-shaped plate, wool fabric sticky wool is arranged on the inner surface of the inverted U-shaped plate at intervals in order, and the two sides of the inverted U-shaped plate are of an opening structure.

The computer teaching desk is characterized in that the wall surface of each thimble is provided with an opening, the thimbles are made of tough plastics or elastic steel sheets, and the diameter of each thimble is larger than the thickness of a display connecting line.

The computer teaching desk is characterized in that a plurality of wire clamping holes which are intersected with the plurality of threading holes are formed in the board surface of the pressing and bouncing wire fixing board, a lock head which is matched with each lock notch is arranged on the pressing and bouncing wire fixing board, and telescopic springs at the upper part and the lower part of the pressing and bouncing wire fixing board are respectively and fixedly arranged in grooves at the upper end and the lower end of each insertion notch.

The computer teaching desk has the advantages that the storage box is arranged, the sealing plate is arranged on the front surface of the storage box, the display can be stored, the computer can be shielded and protected when computer teaching is not performed, the computer is prevented from being exposed for a long time and adsorbing dust, and the service life of the computer is prolonged; the shrouding is detachable construction, and the shrouding is that through-hole and turnbuckle will deposit the case and carry out the confined, conveniently clears up the inside of depositing the case, avoids the laying dust too much, realizes simultaneously that computer display's safety is placed, prevents that the student from dismantling the display and destroying even, and is probably stolen in addition, causes the loss of resource.

Through setting up the removable cover who matches with circle opening and correspond, can realize placing in table body lower part back at the display, in order to cover the circle opening completely, avoid the inside of circle opening to show out, also can avoid daily when not carrying out computer teaching, the display exposes for a long time and adsorbs the dust, reduces computer life.

Through setting up lifter plate, turning handle, can realize computer display's rising and decline, when carrying out computer teaching, through twisting the turning handle soon, the screw rod can realize computer display's rising along with the lifter plate, and when not carrying out computer teaching, the rethread is twisted the turning handle soon and is descended the adjustment, realizes depositing of computer display.

Through setting up the locating clip board, can realize the fixed joint of display base, through setting up two U type solid framves, can grasp display screen bottom both sides respectively and make the display screen firm, avoid rising and decline in-process, the display takes place to shift, causes the damage to the display.

Through setting up the push type spring lock, can realize the locking of lifter plate, avoid leading to the lifter plate to take the display to rotate owing to the nimble rotation of bearing, cause the aversion of display, the damage of display.

The bearing is embedded in the middle of the lower surface of the lifting plate, the lifting plate rotates by taking the screw rod as a central fulcrum, and further the rotation of the display placed on the lifting plate is realized, so that the display can be adjusted between the teacher facing direction and the student facing direction, further the student can clearly see the specific operation demonstration, and the demonstration effect is improved; meanwhile, the situation that a teacher is inconvenient to observe the learning and listening states of students during explanation, and when some students cannot pay attention to the teacher, the teacher can use a computer to shield the sight of the teacher to play a mobile phone, speak and sleep, so that the teaching time cannot be reasonably utilized is avoided.

Through setting up through wires hole, thimble, can realize placing of each line between quick-witted case and the display, press the spring solidus board through setting up, can realize that each card line hole blocks each connecting wire fastening respectively, make to penetrate and have too much surplus in the connecting wire of depositing incasement intracavity, pull the circuit when effectively having avoided unexpected touching circuit or rotating the display screen and lead to the circuit not hard up to cause the computer to shut down or restart, have certain security simultaneously, be convenient for simultaneously cleanly.

Through setting up keyboard standing groove and key cap cleaning device, not only can realize the protection of depositing to keyboard mouse, but also can realize the clean protection to keyboard key cap.

The computer display rotation device is simple and convenient to operate, can quickly and effectively receive and release a computer, can realize the rotation of a teacher with the computer display when in computer teaching, realizes the fixation and clamping of the display screen in the rotation process, avoids the display screen from sliding off, can ensure the safety of the display screen, not only enables the teacher to clearly and directly know the study concentration condition of students when in computer teaching demonstration, but also can facilitate the students to observe specific operation steps, and can effectively improve the teaching effect of the computer teaching; meanwhile, the problem that the existing computer classroom has great potential safety hazard due to disordered wire placement is solved, and great convenience is provided for the maintenance and use of the computer; the invention has simple structure and simple operation process, and is very suitable for popularization.

Drawings

The invention is further illustrated with reference to the following figures and examples.

Fig. 1 is an overall front structural view of the present invention.

Fig. 2 is an overall rear structure diagram of the present invention.

Fig. 3 is a schematic view of the upper surface structure of the lifter plate of the present invention.

Fig. 4 is a schematic view of the lower surface structure of the lifting plate of the present invention.

FIG. 5 is a schematic view of the upper opening cover structure of the present invention.

Figure 6 is a schematic view of the storage box closure of the present invention.

Fig. 7 is a schematic structural diagram of the keyboard placement groove of the present invention.

FIG. 8 is a schematic structural diagram of a key cap cleaning device of the present invention.

In the figure, 1, a table body; 2. a round opening; 3. a chute; 4. a slider; 5. a threading ring; 6. a storage box; 7. a lifting plate; 8. a threaded hole; 9. a handle is rotated; 10. locking the opening at the edge; 11. a limiting edge; 12. a case placing groove; 13. a side groove; 14. threading holes; 15. locking the opening; 16. pressing the bouncing wire fixing plate; 17. inserting the socket; 18. a lock head; 19. a wire clamping hole; 20. a spring; 21, U-shaped fixing frames; 22. a lifting rod; 23. positioning the clamping plate; 24. a push type latch; 25. a bearing; 26. a cover plate; 27. a handle; 28. closing the plate; 29. a through hole; 30. a turnbuckle; 31. pressing the buckle; 32. buckling the plate; 33. a keyboard placing groove; 34. a keycap cleaning device; 35. a handle; 36. an inverted U-shaped plate; 37. woolen cloth is bonded with wool.

Detailed Description

The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic views illustrating only the basic structure of the present invention in a schematic manner, and thus show only the constitution related to the present invention.

With reference to the structures shown in fig. 1-6, a computer teaching desk comprises a desk body 1, wherein the desk body 1 is a computer desk for office teaching, a desktop plate is arranged at the upper end of the desk body 1, a storage box and a computer case placing box are respectively arranged at two sides of the lower end of the desktop plate, a display storage box 6 is arranged between the storage box and the computer case placing box, a sealing plate 28 is arranged on the front surface of the storage box 6, the sealing plate 28 is of a detachable structure, through holes 29 corresponding to threaded holes in the front frame of the storage box 6 are respectively arranged at the periphery of the panel of the sealing plate 28, each screw 30 respectively penetrates through each through hole 29 and is screwed in each threaded hole to fix the sealing plate 28, and the sealing plate 28 is arranged to clean the inside of the storage box 6 so as to avoid excessive dust accumulation; a threaded hole 8 penetrating the inside is formed in the middle of a bottom plate of the storage box 6, a screw 31 is screwed in the threaded hole 8, the upper end of the screw 31 is movably connected with a lifting plate 7 of a circular structure placed in the storage box 6, a bearing 25 is embedded in the middle of the lower surface of the lifting plate 7, the upper part of the screw 31 is inserted into the bearing 25, the lifting plate 7 rotates by taking the screw 31 as a central fulcrum, a rotating handle 9 is arranged outside the screw 31, and the lifting plate 7 can ascend or descend by screwing the rotating handle 9; the two sides of the upper surface of the lifting plate 7 are respectively movably connected with U-shaped fixing frames 21 through lifting rods 22, each U-shaped fixing frame 21 is respectively clamped on two sides of the bottom of the display, the lifting rods 22 are inserted into bearings embedded in the middle of the lower surface of each U-shaped fixing frame 21, rotating handles are arranged at the bottoms of the lifting rods 22, the U-shaped fixing frames 21 can be lifted through rotating the rotating handles in a screwing mode, and the U-shaped fixing frames 21 are clamped on two sides of the bottom of the display, so that the display is more stable and is not prone to shaking; positioning clamp plates 23 are arranged between the U-shaped fixing frames 21 on the two sides of the upper surface of the lifting plate 7, the positioning clamp plates 23 play a role in fixing the display base, spring press plates of pressing structures are respectively arranged on the two sides of the positioning clamp plates 23, and the spring press plates on the two sides are respectively pressed and clamped on the two sides of the display base; the front end and the rear end of the upper surface of the lifting plate 7 are respectively embedded with a press type elastic lock 24, a lock head of each press type elastic lock 24 extends on the front wall surface and the rear wall surface of the lifting plate 7 respectively, a press button of the press type elastic lock 24 is pressed downwards to pop out the lock head, and the press button lock head is pressed again to rebound; a round opening 2 is arranged on a panel of the table body 1 at the upper end of the storage box 6, the round opening 2 is opposite to the lifting plate 7, the diameter of the round opening 2 is larger than that of the lifting plate 7, an annular gap is left when the lifting plate 7 is lifted to the position of the round opening 2, a matched movable cover plate 26 is arranged in the round opening 2, a handle 27 is arranged on the upper surface of the cover plate 26, an annular limiting edge 11 is arranged on the inner wall of the round opening 2, the cover plate 26 covers the upper end of the limiting edge 11, and the cover plate 26 is arranged to completely cover the round opening 2 and prevent the inside of the round opening 2 from being exposed; the wall surface of the lower end of the limiting edge 11 is provided with an annular sliding groove 3, a plurality of sliding blocks 4 are movably clamped in the sliding groove 3, each sliding block 4 is connected with a threading ring 5, the wall surface of each threading ring 5 is provided with a notch, so that a computer display connecting wire can be conveniently extruded, each threading ring 5 is made of tough plastics or elastic steel sheet materials, the diameter of each threading ring 5 is larger than the thickness of the connecting wire, and the connecting wire can freely swing in the threading ring 5; side locking openings 10 matched with the locking heads of the pressing type elastic locks 24 are respectively arranged on the front inner wall surface and the rear inner wall surface of the round opening 2, the locking head of each pressing type elastic lock 24 is respectively inserted into the corresponding side locking opening 10, so that the fixing of the lifting plate 7 can be realized, and the swinging of the lifting plate 7 caused by the rotation of the bearing 25 is avoided; a case placing groove 12 of the computer case placing case and the inner side edge opposite to the storage case 6 are provided with a side edge groove 13, the inner side plate of the side edge groove 13 is provided with a plurality of threading holes 14 which are vertically arranged, the threading holes 14 respectively penetrate through the inner cavity of the storage case 6, the upper end and the lower end of one side edge corresponding to the threading holes 14 are respectively provided with a lock opening 25, the other side edge corresponding to the threading holes 14 is provided with a threading opening 17, a pressing and bouncing wire fixing plate 16 is inserted into the threading opening 17, the plate surface of the pressing and bouncing wire fixing plate 16 is provided with a plurality of wire clamping holes 19 which are intersected with the threading holes 14, each connecting wire of the case and the display respectively penetrates through each threading hole 14, and each connecting wire is clamped and fastened by each wire clamping and bouncing wire fixing plate 16 through pressing, so that excessive surplus connecting wires penetrating into the inner cavity of the storage case 6 are left, thereby avoiding the shutdown or restart of the computer caused by the loose circuit caused by the pulling of the circuit when the lifting plate 7 rotates; a lock head 18 matched with each lock opening 15 is arranged on the pressing and bouncing wire fixing plate 16, extension springs 20 at the upper part and the lower part of the pressing and bouncing wire fixing plate 16 are respectively and fixedly arranged in grooves at the upper end and the lower end of the penetrating opening 17, further, in order to facilitate the storage of a keyboard and a mouse, a keyboard placing groove 33 is arranged at the lower side of the round opening 2 on the table body 1, a buckling plate 32 hinged with the keyboard placing groove 33 is arranged on the keyboard placing groove 33, a pressing type buckle 24 matched with the keyboard placing groove 33 is arranged at the front side of the lower surface of the buckling plate 32, a key cap cleaning device 34 is arranged in the keyboard placing groove 33, the key cap cleaning device 34 consists of a grab handle 35 and an inverted U-shaped plate 36, the grab handle 35 is arranged at the upper part of the inverted U-shaped plate 36, wool fabric sticky hairs 37 are arranged on the inner surface of the inverted U-shaped plate at intervals, the two sides of the inverted U-shaped plate 36 are of an opening structure.

When the computer teaching desk is used for installing a computer, firstly, a rotating handle 9 at the lower end of a storage box 6 is screwed to drive a screw rod 31 to ascend upwards, simultaneously, a lifting plate 7 is lifted to pass through a round opening 2 to be level with the round opening, a computer display base is clamped on a positioning clamping plate 23 to be fixed, U-shaped fixing frames 21 at two sides are respectively clamped at two sides of the bottom of the display screen by screwing lifting rods 22 at two sides to stabilize the display screen, then a case is placed in a case placing groove 12, connecting wires between the case and the display respectively pass through threading holes 14 and pass through the inner cavity of the storage box 6, then respectively pass through threading rings 5 to be connected with the display, the bouncing fixing wire plate 16 is pressed inwards, the connecting wires are respectively fastened and clamped by the threading holes 19, excessive connecting wires penetrating into the inner cavity of the storage box 6 are remained, and after the connecting wires are connected, one of the press-type elastic locks 24 is pressed downwards to lock the lifting plate 7, so that the situation that the lifting plate 7 rotates with a display due to flexible rotation of a bearing 25 is avoided, in the teaching process, in order to facilitate students to watch the display, the press-type elastic lock 24 can be pressed downwards again to rebound a lock head and stir the display to rotate, meanwhile, each connecting wire at the rear of the display drives each sliding block 4 to slide in the sliding groove 3 along with the rotation of the display, and each connecting wire shuttles in the threading ring 5, and because a long connecting wire is left in the storage box 6, pulling obstruction of the connecting wire cannot occur, the press-type elastic lock 24 is pressed again to lock the lifting plate 7, the direction is kept, when the teaching desk is not used, the rotary handle 9 can be screwed to enable the lifting plate 7 to descend with the computer display to be placed in the storage box 6, and the circular opening 2 is sealed by the cover plate 26; during daily use, a lot of dust is adsorbed on the periphery of a keycap on a keyboard, when the keycap is cleaned, disposable alcohol paper can be prepared in advance and attached to wool fabric sticky hair 37 on the inner surface of an inverted U-shaped plate 36 on a keycap cleaning device 34, the disposable alcohol paper can be reversely buckled on the side surface of the keycap through the inverted U-shaped plate 36, the periphery of the keycap can be cleaned by rotating the inverted U-shaped plate 36 and utilizing the disposable alcohol paper, and the keycap cleaning device 34 can be suitable for most keycaps due to the opening structures on the two sides of the inverted U-shaped plate 36; the computer display rotation device is simple and convenient to operate, can quickly and effectively receive and release a computer, can realize the rotation of a teacher with the computer display when in computer teaching, realizes the fixation and clamping of the display screen in the rotation process, avoids the display screen from sliding off, can ensure the safety of the display screen, not only enables the teacher to clearly and directly know the study concentration condition of students when in computer teaching demonstration, but also can facilitate the students to observe specific operation steps, and can effectively improve the teaching effect of the computer teaching; meanwhile, the problem that the existing computer classroom has great potential safety hazard due to disordered wire placement is solved, and great convenience is provided for the maintenance and use of the computer; the invention has simple structure and simple operation process, and is very suitable for popularization.

In light of the foregoing description of the preferred embodiment of the present invention, many modifications and variations will be apparent to those skilled in the art without departing from the spirit and scope of the invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.

Claims

1. The utility model provides a computer teaching table, includes the table body (1), characterized by: a display storage box (6) is arranged between a storage box and a computer case placing box which are respectively arranged on two sides of the lower end of a desktop plate of the desk body (1), a threaded hole (8) which is communicated with the interior is arranged in the middle of a bottom plate of the storage box (6), a screw rod (31) is screwed in the threaded hole (8), the upper end of the screw rod (31) is connected with a lifting plate (7) which is placed in the storage box (6) through a bearing (25), two sides of the upper surface of the lifting plate (7) are respectively movably connected with a U-shaped fixing frame (21) through a lifting rod (22), a positioning clamping plate (23) is arranged between the U-shaped fixing frames (21) on two sides of the upper surface of the lifting plate (7), a round opening (2) which is opposite to the lifting plate (7) is arranged on a panel of the desk body (1) on the upper end of the storage box (6), and an annular sliding chute (3) is arranged on the lower end wall surface of the round opening (2), spout (3) internalization joint have several slider (4), each slider (4) is connected with through wires ring (5) respectively deposit case (6) and be equipped with side groove (13) on the side that quick-witted case standing groove (12) links to each other the interior curb plate of side groove (13) on be equipped with the several through wires hole (14) of depositing case (6) inner chamber of seeing through of vertical arrangement several through wires hole (14) one side frame the upper and lower end be equipped with fore-and-aft (25) respectively several through wires hole (14) another side frame be equipped with socket (17) interlude mouth (17) in insert and press spring solid line board (16).

2. A computer teaching table as claimed in claim 1 wherein: the front surface of the storage box (6) is provided with a sealing plate (28), the sealing plate (28) is of a detachable structure, through holes (29) corresponding to each threaded hole in the front frame of the storage box (6) are respectively formed in the periphery of a panel of the sealing plate (28), and each screw (30) penetrates through each through hole (29) and is screwed in each threaded hole to fix the sealing plate (28).

3. A computer teaching table as claimed in claim 1 wherein: the lifting plate (7) is of a circular structure, a bearing (25) is embedded in the middle of the lower surface of the lifting plate (7), the upper portion of a screw rod (31) is inserted into the bearing (25), the lifting plate (7) rotates by taking the screw rod (31) as a central fulcrum, and a rotating handle (9) is arranged outside the screw rod (31).

4. A computer teaching table as claimed in claim 1 wherein: the lifting rod (22) is inserted into a bearing embedded in the middle of the lower surface of the U-shaped fixing frame (21), and a rotating handle is arranged at the bottom of the lifting rod (22).

5. A computer teaching table as claimed in claim 1 wherein: spring pressing plates of pressing structures are respectively arranged on two sides of the positioning clamping plate (23), and the spring pressing plates on the two sides are respectively pressed and clamped on two sides of the display base.

6. A computer teaching table as claimed in claim 1 wherein: press type spring locks (24) are respectively embedded at the front end and the rear end of the upper surface of the lifting plate (7), and a lock head of each press type spring lock (24) is respectively stretched on the front wall surface and the rear wall surface of the lifting plate (7); the front inner wall surface and the rear inner wall surface of the round opening (2) are respectively provided with a side locking notch (10) matched with the tapered ends of the pressing type spring locks (24), and the tapered end of each pressing type spring lock (24) is respectively inserted into the corresponding side locking notch (10) to fix the lifting plate (7).

7. A computer teaching table as claimed in claim 1 wherein: the table is characterized in that a keyboard placing groove (33) is formed in the lower side of the round opening (2) in the table body (1), a buckling plate (32) hinged to the keyboard placing groove (33) is arranged on the keyboard placing groove (33), a pressing type buckle (24) matched with the keyboard placing groove (33) is arranged on the front side of the lower surface of the buckling plate (32), and a keycap cleaning device (34) is arranged in the keyboard placing groove (33).

8. A computer teaching table as claimed in claim 7 wherein: keycap cleaning device (34) constitute by grab handle (35) and inverted U template (36) upper portion is equipped with grab handle (35) inverted U template internal surface is gone up the interval and is equipped with woolen cloth viscose hair (37) in order, inverted U template (36) both sides be open structure.

9. A computer teaching table as claimed in claim 1 wherein: the wall surface of each threading ring (5) is provided with a notch, the threading rings (5) are made of tough plastics or elastic steel sheets, and the diameter of each threading ring (5) is larger than the thickness of a display connecting line.

10. A computer teaching table as claimed in claim 1 wherein: the board surface of the pressing and bouncing wire fixing board (16) is provided with a plurality of wire clamping holes (19) which are intersected with the plurality of wire threading holes (14), the pressing and bouncing wire fixing board (16) is provided with a lock head (18) which is matched with each lock opening (15), and telescopic springs (20) at the upper part and the lower part of the pressing and bouncing wire fixing board (16) are respectively and fixedly arranged in grooves at the upper end and the lower end of each penetrating opening (17).