CN114371592A

CN114371592A - Teaching demonstration integrated machine

Info

Publication number: CN114371592A
Application number: CN202210134923.0A
Authority: CN
Inventors: 张少华; 曹刚; 戴鹏
Original assignee: Sichuan Zhongsen Tongyue Technology Co ltd
Current assignee: Sichuan Zhongsen Tongyue Technology Co ltd
Priority date: 2022-02-14
Filing date: 2022-02-14
Publication date: 2022-04-19

Abstract

The utility model relates to a teaching demonstration all-in-one, it includes mounting bracket and projection equipment, the mounting bracket is used for fixing on the wall in classroom, the fixed show board that is provided with on the mounting bracket, the show board includes clipboard, installing frame, printing opacity glass and backplate, clipboard and installing frame are all fixed to be set up on the mounting bracket, just the clipboard is located one side of installing frame, printing opacity glass is fixed to be set up on the installing frame, the backplate sets up in the installing frame, just the backplate is parallel with printing opacity glass, the one end rotation that is close to printing opacity glass on the backplate is provided with a plurality of palettes, the palette includes light-absorbing face and reflection of light face, be provided with in the installing frame and be used for ordering about adjusting plate pivoted drive assembly, projection equipment is used for projecting the picture on printing opacity glass. The projection equipment has the effect of saving the installation space of the projection equipment.

Description

Teaching demonstration integrated machine

Technical Field

The application relates to the technical field of teaching aids, in particular to a teaching demonstration all-in-one machine.

Background

In this age with advanced information technology, multimedia classrooms have become indispensable teaching tools; important knowledge points in a classroom and on a network are displayed to students in a picture and text combined mode through a multimedia classroom, and the teacher is combined with on-site teaching of the teacher, so that the teacher can analyze the knowledge points more clearly and thoroughly, and the absorption efficiency of the students on the important knowledge points is greatly improved.

At present, a large number of teaching devices and tools such as blackboards, sound equipment, projection equipment, computers and the like are usually arranged in multimedia classrooms, so that students can conveniently watch chalk characters written on the blackboards, and the blackboards usually adopt panels with dark colors such as black or dark green and the like; because the dark panel has strong light absorption capacity, the picture projected on the blackboard by the projection equipment is usually unclear, and projection cloth with relatively good light reflection effect needs to be additionally arranged for the projection equipment to project the picture; the installation of the projection device requires a large installation space, and therefore, the limited space in a classroom is greatly occupied.

Disclosure of Invention

In order to save projection equipment's installation space, this application provides a teaching demonstration all-in-one.

The application provides a teaching demonstration all-in-one adopts following technical scheme:

the utility model provides a teaching demonstration all-in-one, includes mounting bracket and projection equipment, the mounting bracket is used for fixing on the wall in classroom, the fixed show board that is provided with on the mounting bracket, the show board includes clipboard, installing frame, printing opacity glass and backplate, clipboard and installing frame are all fixed to be set up on the mounting bracket, just the clipboard is located one side of installing frame, printing opacity glass is fixed to be set up on the installing frame, the backplate sets up in the installing frame, just the backplate is parallel with printing opacity glass, the one end that is close to printing opacity glass on the backplate is rotated and is provided with a plurality of palettes, the palette includes light-absorbing surface and reflection of light face, be provided with in the installing frame and be used for ordering about adjusting plate pivoted drive assembly, projection equipment is used for projecting the picture on the printing opacity glass.

By adopting the technical scheme, when the projection equipment is not needed, the light absorbing surface of the color palette faces to the light transmitting glass, a teacher writes the contents to be written on the writing board or the light transmitting glass, and the light absorbing surface with the darker color on the color palette faces to the light transmitting glass, so that students can conveniently observe chalk characters written on the light transmitting glass; when projection equipment is needed, the reflecting surface of the palette faces to the light-transmitting glass through the driving assembly, the projection equipment is started, and a picture needing to be projected can be projected onto the light-transmitting glass, so that the picture projected onto the light-transmitting glass is clearer, projection cloth does not need to be additionally installed, and the installation space of the projection equipment is greatly saved.

Optionally, the driving assembly includes driving wheels, connecting rods and driving sources, the rotating shafts of the color palettes are parallel, the driving wheels are coaxially and fixedly disposed on the rotating shafts of the color palettes, the connecting rods are hinged to the driving wheels, and the driving sources are used for driving one of the driving wheels to rotate.

Through adopting above-mentioned technical scheme, order about one of them drive wheel through the driving source and rotate, when the drive wheel pivoted, drive a plurality of drive wheels through the connecting rod and rotate simultaneously to order about a plurality of palettes and rotate simultaneously.

Optionally, the back plate is arranged in the installation frame in a sliding manner along a direction perpendicular to the transparent glass, and a first driving piece for driving the back plate to slide is arranged in the installation frame.

Through adopting above-mentioned technical scheme, the palette upset needs certain upset space, when needs rotate the palette, orders about the backplate through first driving piece and keeps away from printing opacity glass, later, rotates the palette, and the palette rotates and accomplishes the back, orders about the backplate again and slides to being close to printing opacity glass direction to reduce the interval between palette and the printing opacity glass, improve the light absorption effect of light-absorbing surface and the light reflection effect of reflection of light face on the palette.

Optionally, the installation pole is slidably arranged on the mounting bracket along the direction of the parallel light-transmitting glass, the installation pole is parallel to the light-transmitting glass and is located at one end of the light-transmitting glass far away from the back plate, a wiping cloth is arranged at one end, close to the light-transmitting glass, of the installation pole, the wiping cloth is abutted to the surface of the light-transmitting glass, and a second driving piece used for driving the installation pole to slide is arranged on the mounting bracket.

Through adopting above-mentioned technical scheme, order about the installation pole through the second driving piece and slide, the installation pole is gliding in, cleans printing opacity glass's surface through the wiper to be convenient for erase writing at the characters on printing opacity glass surface.

Optionally, a water guide pipe is embedded in the installation rod, a plurality of water outlet holes communicated with the water guide pipe are formed in one end, close to the light-transmitting glass, of the installation rod, each water outlet hole is provided with an atomizing nozzle, the water guide pipe is communicated with a water storage tank, and the water storage tank is provided with a water pump used for conveying water in the water guide pipe.

Through adopting above-mentioned technical scheme, the installation pole is at gliding in-process, and start the water pump and carry the water in with the water storage tank to in the aqueduct, later, sprays to printing opacity glass's surface through the apopore on the installation pole, is cleaned printing opacity glass surface by the wiper again, further improves the wiper and cleans printing opacity glass surface back, the clean degree on printing opacity glass surface.

Optionally, the wiping cloth is detachably connected with the mounting rod, the mounting plate is fixedly arranged on the wiping cloth, and a placing groove for placing the mounting plate is formed in one end, close to the light projecting glass, of the mounting rod.

Through adopting above-mentioned technical scheme, the long back of wiper use, a large amount of chalk powder can remain on the wiper surface to influence the wiping effect of wiper, take out through the standing groove with the mounting panel on from the installation pole, can dismantle the wiper from the installation pole and get off, be convenient for wash the wiper.

Optionally, the installation piece is provided with along the direction slip of parallel printing opacity glass on the mounting bracket, the installation pole slides along the direction that is close to or keeps away from printing opacity glass and sets up on the installation piece, be provided with on the installation piece and be used for preventing the gliding spacing subassembly of installation pole, the second driving piece is used for ordering about the installation piece and slides.

Through adopting above-mentioned technical scheme, slide to keeping away from printing opacity glass direction through loosening spacing subassembly and ordering about the installation pole, make the interval increase between installation pole and the printing opacity glass to be convenient for take out the mounting panel from the standing groove of installation pole.

Optionally, the limiting assembly comprises an insertion rod and a first elastic piece, the insertion rod is arranged on the mounting block in a sliding mode along the sliding direction perpendicular to the mounting rod, an insertion groove used for allowing the insertion rod to be inserted is formed in the mounting rod, and the first elastic piece is used for driving the insertion rod to slide towards the direction close to the mounting rod.

Through adopting above-mentioned technical scheme, support the back tightly when wiping cloth and printing opacity glass surface, make the inserting rod insert the inserting groove on the installation pole, the elasticity effect through first elastic component stops the inserting rod to a certain extent to withdraw from the inserting groove to the realization is spacing to the installation pole.

Optionally, a second elastic element for driving the mounting rod to slide away from the transparent glass is further disposed on the mounting block.

Through adopting above-mentioned technical scheme, break away from the back in the inserting groove of inserting pole from the installation pole, the installation pole slides to keeping away from printing opacity glass direction under the elastic force effect of second elastic component, does not need manual release installation pole, and it is more convenient when messenger dismantles the wiper.

Optionally, an air duct is further embedded in the installation rod, a plurality of air outlets communicated with the air duct are formed in one end, close to the light-transmitting glass, of the installation rod, and an air blower used for blowing air into the air duct is communicated with the air duct.

Through adopting above-mentioned technical scheme, the wiping cloth is cleaned the completion back to printing opacity glass surface, blows to the trachea in through the air-blower, and later, gas blows to printing opacity glass surface through the gas outlet on the installation pole to be convenient for weather the remaining moisture in printing opacity glass surface.

In summary, the present application includes at least one of the following beneficial technical effects:

1. when the projection equipment is required to be used, the reflection surface of the palette is driven to face the light-transmitting glass through the driving assembly, and the projection equipment is started to project the picture to be projected onto the light-transmitting glass, so that the picture projected onto the light-transmitting glass is clearer, the projection cloth is not required to be additionally installed, and the installation space of the projection equipment during installation is greatly saved;

2. the palette needs a certain turnover space when being turned, the backboard is driven to be away from the transparent glass by the first driving piece, then the palette is rotated, and the backboard is driven to slide towards the direction close to the transparent glass after the palette is rotated, so that the distance between the palette and the transparent glass is reduced, and the light absorption effect of a light absorption surface and the light reflection effect of a light reflection surface on the palette are improved;

3. the installation pole is at gliding in-process, starts the water pump and carries the water in the water storage tank to the aqueduct in, later, sprays to printing opacity glass's surface through the apopore on the installation pole, is cleaned printing opacity glass surface by the wiper again, further improves the wiper and cleans printing opacity glass surface's clean degree on back, printing opacity glass surface.

Drawings

FIG. 1 is a schematic diagram of the overall structure of an embodiment of the present application;

FIG. 2 is a partial schematic structural view of an embodiment of the present application, which is mainly used to express the overall structure of a display board;

FIG. 3 is an enlarged view of portion A of FIG. 2;

FIG. 4 is a partial schematic structural view of an embodiment of the present application, which is mainly used for expressing the structural view of a mounting rod;

FIG. 5 is an enlarged view of portion B of FIG. 4;

fig. 6 is a partial structural schematic diagram of an embodiment of the present application, which is mainly used for expressing the internal structure of the mounting rod.

Description of reference numerals: 1. a mounting frame; 11. mounting a rod; 111. a placement groove; 112. mounting a plate; 113. wiping cloth; 114. inserting grooves; 115. a water conduit; 1151. a water outlet hole; 1152. an atomizing spray head; 116. a water storage tank; 1161. a water pump; 117. an air duct; 1171. an air outlet; 118. a blower; 12. a second driving member; 13. mounting blocks; 131. mounting grooves; 132. a limiting groove; 133. a second elastic member; 134. a fixed mount; 2. a projection device; 3. a display board; 31. a writing board; 32. installing a frame; 321. a first driving member; 33. a light-transmitting glass; 34. a back plate; 341. a containing groove; 342. a color palette; 3421. a dark panel; 3422. a light-colored panel; 4. a drive assembly; 41. a driving wheel; 42. a connecting rod; 43. a drive source; 5. a limiting component; 51. a plug rod; 511. a limiting block; 52. a first elastic member.

Detailed Description

The present application is described in further detail below with reference to figures 1-6.

The embodiment of the application discloses a teaching demonstration all-in-one machine. Referring to fig. 1, 2, including mounting bracket 1 and projection apparatus 2, mounting bracket 1 is used for fixing on the wall in classroom, the fixed show board 3 that is provided with on mounting bracket 1, show board 3 includes clipboard 31, the installing frame 32, printing opacity glass 33 and backplate 34, clipboard 31 and installing frame 32 are all fixed to be set up on mounting bracket 1, and clipboard 31 is located one side of installing frame 32, the fixed setting on installing frame 32 of glass that throws light, and printing opacity glass 33 is parallel with clipboard 31, printing opacity glass 33 adopts ground glass, projection apparatus 2 includes the projecting apparatus, projection apparatus 2 is used for projecting the picture on printing opacity glass 33.

Referring to fig. 2, the back plate 34 is slidably disposed in the mounting frame 32 along a direction perpendicular to the transparent glass 33, the back plate 34 is parallel to the light projecting glass, a first driving member 321 for driving the back plate 34 to slide is disposed in the mounting frame 32, the first driving member 321 includes a driving cylinder, the driving cylinder is fixedly disposed in the mounting frame 32, and a piston rod of the driving cylinder is fixedly connected to the back plate 34.

Referring to fig. 2 and 3, an accommodating groove 341 is formed in one end of the back plate 34 close to the transparent glass 33, a plurality of color palettes 342 are rotatably arranged in the accommodating groove 341, rotating shafts of the color palettes 342 are parallel, the length directions of the color palettes 342 are parallel, each color palette 342 comprises a light absorbing surface and a light reflecting surface, a dark color panel 3421 is laid on the light absorbing surface, the color of the dark color panel 3421 is black or dark green, a light color panel 3422 is laid on the light reflecting surface, and the eye spirit of the light color panel 3422 is white; the mounting frame 32 is provided with a driving assembly 4 for driving the adjusting plate to rotate.

When the projection device 2 is not needed, the light absorbing surface of the color palette 342 faces the light transmitting glass 33, the instructor writes the contents to be written on the writing board 31 or the light transmitting glass 33, and the light absorbing surface with the darker color on the color palette 342 faces the light transmitting glass 33, so that the students can conveniently observe the chalk characters written on the light transmitting glass 33; when projection apparatus 2 is needed to be used, back plate 34 is driven away from light-transmitting glass 33 through first driving piece 321, the reflecting surface of color palette 342 is driven towards light-transmitting glass 33 through driving component 4, back plate 34 is driven to slide towards the direction close to light-transmitting glass 33, color palette 342 is pressed against light-transmitting glass 33, projection apparatus 2 is started to project the image needing projection onto the light-transmitting glass, and the image projected onto light-transmitting glass 33 is clearer.

Referring to fig. 3, the driving assembly 4 includes driving wheels 41, connecting rods 42 and driving sources 43, the driving wheels 41 are coaxially and fixedly disposed on the rotating shaft of each palette 342, the connecting rods 42 are respectively hinged to the driving wheels 41, the connecting ends of the connecting rods 42 and the driving wheels 41 deviate from the circle centers of the driving wheels 41, the driving sources 43 include driving motors, and the output shafts of the driving motors are coaxially and fixedly connected to one of the driving wheels 41; one of the driving wheels 41 is driven to rotate by the driving source 43, and the driving wheels 41 rotate simultaneously, and the plurality of driving wheels 41 are driven to rotate simultaneously by the connecting rod 42, so that the plurality of palettes 342 are driven to rotate simultaneously.

Referring to fig. 4 and 5, an installation rod 11 is arranged on the installation frame 1 in a sliding manner along a direction parallel to the transparent glass 33 and located at one end, far away from the back plate 34, of the transparent glass 33, the installation rod 11 is parallel to the transparent glass 33, a placement groove 111 is formed in one end, close to the transparent glass 33, of the installation rod 11 along a direction perpendicular to the installation rod 11, an installation plate 112 is placed in the placement groove 111, a wiping cloth 113 is fixedly arranged at one end, close to the light projecting glass, of the installation plate 112, the wiping cloth 113 is abutted to the surface of the transparent glass 33, and a second driving piece 12 for driving the installation rod 11 to slide is arranged on the installation frame 1; the mounting rod 11 is driven to slide by the second driving member 12, and the surface of the transparent glass 33 is wiped by the wiper 113 while the mounting rod 11 slides, so that characters written on the surface of the transparent glass 33 can be erased conveniently.

Referring to fig. 4 and 5, the mounting block 13 is disposed on the mounting frame 1 and on both sides of the mounting rod 11 along the direction of the parallel transparent glass 33, the mounting grooves 131 are disposed on both sides of the mounting block 13 and close to each other along the direction of the vertical light projection glass, both ends of the mounting rod 11 are respectively disposed in the mounting grooves 131 of the two mounting frames 32 in a sliding manner, and the two mounting blocks 13 are respectively provided with the limiting component 5 for preventing the mounting rod 11 from sliding.

After the wiper 113 is used for a long time, a large amount of chalk powder is left on the surface of the wiper 113, so that the wiping effect of the wiper 113 is affected, the spacing component 5 is loosened, the mounting rod 11 is driven to slide towards the direction away from the transparent glass 33, the interval between the mounting rod 11 and the transparent glass 33 is increased, the mounting plate 112 is conveniently taken out of the placing groove 111 of the mounting rod 11, and the wiper 113 is cleaned.

Referring to fig. 5, the second driving member 12 includes two rodless cylinders, the two rodless cylinders are respectively disposed on two sides of the transparent glass 33, the length directions of the two rodless cylinders are parallel to the sliding direction of the mounting blocks 13, the piston of one rodless cylinder is fixedly connected to one of the mounting blocks 13, and the piston of the other rodless cylinder is fixedly connected to the other mounting block 13.

Referring to fig. 5, the limiting assembly 5 includes an insertion rod 51 and a first elastic member 52, a through hole communicated with the mounting groove 131 is formed in the bottom wall of the mounting block 13 along the sliding direction of the mounting block 13, the insertion rod 51 is slidably disposed in the through hole, a limiting groove 132 communicated with the through hole is formed in the side wall of the through hole along the sliding direction of the insertion rod 51, a limiting block 511 is fixedly disposed on the insertion rod 51, the limiting block 511 is slidably disposed in the limiting groove 132, and an insertion groove 114 for the insertion of the insertion rod 51 is formed in the mounting rod 11; after the wiper 113 abuts against the surface of the transparent glass 33, the insertion rod 51 is inserted into the insertion groove 114 of the mounting rod 11, so that the mounting rod 11 is limited.

Referring to fig. 5, the first elastic element 52 includes a first pressure spring, the first pressure spring is sleeved on the insertion rod 51 and is located in the limiting groove 132, one end of the first pressure spring abuts against the side wall of the limiting groove 132 far away from the mounting rod 11, and the other end of the first pressure spring abuts against the limiting block 511; the insertion rod 51 is prevented from being withdrawn from the insertion groove 114 to some extent by the elastic force of the first elastic member 52.

Referring to fig. 5, an arc-shaped surface is formed at one end of the insertion rod 51 close to the mounting rod 11, and the insertion rod 51 is conveniently inserted into the insertion groove 114 of the mounting rod 11 through the arc-shaped surface.

Referring to fig. 5, the mounting block 13 is further provided with a second elastic member 133 for driving the mounting rod 11 to slide in a direction away from the transparent glass 33, the second elastic member 133 includes a second pressure spring, one end of the mounting groove 131 close to the transparent glass 33 is provided with a storage groove along the sliding direction of the mounting rod 11, the second pressure spring is arranged in the storage groove, one end of the second pressure spring abuts against the bottom wall of the storage groove, and the other end of the second pressure spring abuts against the mounting rod 11; after the insertion rod 51 is separated from the insertion groove 114 of the installation rod 11, the installation rod 11 slides away from the transparent glass 33 under the elastic force of the second elastic member 133, so that the installation rod 11 does not need to be pushed out manually, and the wiping cloth 113 can be detached more conveniently.

Referring to fig. 5, 6, the embedded aqueduct 115 that is equipped with of installation pole 11, a plurality of apopores 1151 that communicate with aqueduct 115 have been seted up to the one end that is close to printing opacity glass 33 on the installation pole 11, apopore 1151 is located the below of standing groove 111, every apopore 1151 department all is provided with atomizer 1152, the intercommunication has water storage tank 116 on the aqueduct 115, the fixed mount 134 that is provided with on the installation piece 13, water storage tank 116 is fixed to be set up on mount 134, the water inlet has been seted up on the top of water storage tank 116, water inlet department lock joint has sealed lid, be provided with the water pump 1161 that is used for the defeated water in the aqueduct 115 on the water storage tank 116.

In the sliding process of the installation rod 11, the water pump 1161 is started to convey water in the water storage tank 116 to the water guide pipe 115, and then the water is sprayed to the surface of the transparent glass 33 through the water outlet 1151 on the installation rod 11, and the surface of the transparent glass 33 is wiped by the wiping cloth 113, so that the cleanness of the surface of the transparent glass 33 after the surface of the transparent glass 33 is wiped by the wiping cloth 113 is further improved.

Referring to fig. 6, an air duct 117 is further embedded in the installation rod 11, a plurality of air outlets 1171 communicated with the air duct 117 are formed in one end of the installation rod 11 close to the transparent glass 33, the air outlets 1171 are located above the placing groove 111, an air blower 118 used for blowing air into the air duct 117 is communicated with the air duct 117, and the air blower 118 is fixedly arranged on the fixing frame 134; after the wiping cloth 113 wipes the surface of the transparent glass 33, air is blown into the air guide pipe 117 by the blower 118, and then the air is blown to the surface of the transparent glass 33 through the air outlet 1171 on the mounting rod 11, so that the residual moisture on the surface of the transparent glass 33 can be dried conveniently.

The implementation principle of the teaching demonstration all-in-one machine in the embodiment of the application is as follows: when the projection apparatus 2 is not needed, the lecturer writes the contents to be written on the writing board 31 or the light-transmitting glass 33 by making the light-absorbing surface of the color palette 342 face the light-transmitting glass 33, since the light-absorbing surface of the color palette 342 in a darker color faces the light-transmitting glass 33, thereby facilitating the student to observe the chalk characters written on the light-transmitting glass 33.

When needs use projection equipment 2, order about backplate 34 through first driving piece 321 and keep away from printing opacity glass 33, order about one of them drive wheel 41 through driving source 43 and rotate, in the time of drive wheel 41 pivoted, drive a plurality of drive wheel 41 through connecting rod 42 and rotate simultaneously, thereby order about a plurality of palettes 342 and rotate simultaneously, make the reflection of light face of palette 342 towards printing opacity glass 33, order about backplate 34 again to sliding to being close to printing opacity glass 33 direction, make palette 342 contradict with printing opacity glass 33, start projection equipment 2 and can be with the picture projection that needs the projection on the projection glass, make the picture that projects on printing opacity glass 33 more clear, thereby need not install projection cloth in addition, the installation space of projection equipment 2 has been saved greatly.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. The utility model provides a teaching demonstration all-in-one which characterized in that: the display board comprises an installation rack (1) and projection equipment (2), wherein the installation rack (1) is used for being fixed on a wall surface of a classroom, an exhibition board (3) is fixedly arranged on the installation rack (1), the exhibition board (3) comprises a writing board (31), an installation frame (32), light-transmitting glass (33) and a back plate (34), the writing board (31) and the installation frame (32) are fixedly arranged on the installation rack (1), the writing board (31) is positioned on one side of the installation frame (32), the light-transmitting glass (33) is fixedly arranged on the installation frame (32), the back plate (34) is arranged in the installation frame (32), the back plate (34) is parallel to the light-transmitting glass (33), one end, close to the light-transmitting glass (33), of the back plate (34) is rotatably provided with a plurality of color palettes (342), each color palette (342) comprises a light absorbing surface and a light reflecting surface, the mounting frame (32) is internally provided with a driving assembly (4) for driving the adjusting plate to rotate, and the projection equipment (2) is used for projecting pictures onto the transparent glass (33).

2. The teaching demonstration all-in-one machine of claim 1, wherein: the driving assembly (4) comprises driving wheels (41), a connecting rod (42) and a driving source (43), rotating shafts of the palettes (342) are parallel, the driving wheels (41) are coaxially and fixedly arranged on the rotating shafts of the palettes (342), the connecting rod (42) is hinged with the driving wheels (41), and the driving source (43) is used for driving one of the driving wheels (41) to rotate.

3. The teaching demonstration all-in-one machine of claim 1, wherein: the back plate (34) is arranged in the installation frame (32) in a sliding mode along the direction perpendicular to the light-transmitting glass (33), and a first driving piece (321) used for driving the back plate (34) to slide is arranged in the installation frame (32).

4. The teaching demonstration all-in-one machine of claim 1, wherein: the installation pole (11) is provided with in the direction slip of parallel printing opacity glass (33) on mounting bracket (1), installation pole (11) are parallel with printing opacity glass (33) and are located printing opacity glass (33) and keep away from the one end of backplate (34), the one end that is close to printing opacity glass (33) on installation pole (11) is provided with wiper (113), the surface butt of wiper (113) and printing opacity glass (33), be provided with on mounting bracket (1) and be used for ordering about installation pole (11) gliding second driving piece (12).

5. The teaching demonstration all-in-one machine of claim 4, wherein: the installation pole (11) are embedded to be equipped with aqueduct (115), a plurality of apopores (1151) that communicate with aqueduct (115) are seted up to the one end that is close to printing opacity glass (33) on installation pole (11), every apopore (1151) department all is provided with atomizer (1152), the intercommunication has water storage tank (116) on aqueduct (115), be provided with on water storage tank (116) and be used for water pump (1161) to the defeated water in aqueduct (115).

6. The teaching demonstration all-in-one machine of claim 4, wherein: the light-projecting glass cleaning device is characterized in that the wiping cloth (113) is detachably connected with the mounting rod (11), the mounting plate (112) is fixedly arranged on the wiping cloth (113), and a placing groove (111) for placing the mounting plate (112) is formed in one end, close to the light-projecting glass, of the mounting rod (11).

7. The teaching demonstration all-in-one machine of claim 6, wherein: the direction slip of parallel printing opacity glass (33) is provided with installation piece (13) on mounting bracket (1), installation pole (11) are slided along the direction of being close to or keeping away from printing opacity glass (33) and are set up on installation piece (13), be provided with on installation piece (13) and be used for preventing gliding spacing subassembly (5) of installation pole (11), second driving piece (12) are used for ordering about installation piece (13) and slide.

8. The teaching demonstration all-in-one machine of claim 7, wherein: the limiting assembly (5) comprises an inserting rod (51) and a first elastic piece (52), the inserting rod (51) is arranged on the mounting block (13) in a sliding mode along the sliding direction perpendicular to the mounting rod (11), an inserting groove (114) for inserting the inserting rod (51) is formed in the mounting rod (11), and the first elastic piece (52) is used for driving the inserting rod (51) to slide towards the direction close to the mounting rod (11).

9. The teaching demonstration integrated machine of claim 8, wherein: the mounting block (13) is further provided with a second elastic piece (133) used for driving the mounting rod (11) to slide towards the direction far away from the transparent glass (33).

10. The teaching demonstration all-in-one machine of claim 5, wherein: the installation rod (11) is internally embedded with an air duct (117), one end of the installation rod (11) close to the light-transmitting glass (33) is provided with a plurality of air outlets (1171) communicated with the air duct (117), and the air duct (117) is communicated with an air blower (118) used for blowing air into the air duct (117).