Interactive display device based on teaching

Abstract

The invention belongs to the technical field of interactive display devices, and particularly relates to a teaching-based interactive display device which comprises a fixed support, a protective shell is arranged on the fixed support, a screen is fixedly arranged in the protective shell, a distance adjusting assembly is arranged in the protective shell, and the distance adjusting assembly comprises a first shielding plate. The distance adjusting assembly comprises a first shielding plate, a plurality of second shielding plates are arranged in the first shielding plate in a sliding mode, a reset plate is arranged on one side of the first shielding plate in a sliding mode, by moving the first shielding plate, the first shielding plate shields the shortest words or annotations, by stretching the second shielding plates, the rest parts are shielded, and the distance adjusting assembly further comprises first guide rods which are symmetrically arranged; according to the invention, the first shielding plate is moved to shield the shortest word, and then the second shielding plate is stretched to shield the unshielded part of the word, so that the problem that the annotation of the short word is excessively shielded is avoided while the long word is shielded, and students can watch the annotation content of all words.

Description

Technical Field

[0001] The invention belongs to the technical field of interactive display devices, in particular to an interactive display device based on teaching. Background Art

[0002] The teaching-based interactive display device is a device that integrates multiple technologies, functions and interactive methods. It is designed to promote interaction between teachers and students during the teaching process and enhance students' understanding and memory of learning content.

[0003] When teaching English, the existing interactive display device displays words through a display, allowing students to learn the composition and annotations of words. During the interaction, the words or annotations are blocked by a whole baffle, and students are asked to answer random questions.

[0004] The existing interactive display device still has some problems in actual use. Due to the different lengths of words, when multiple words and their annotations are displayed on the display, the display lengths on the display will also be different. During the interaction, all words are blocked by moving the entire baffle. After the blocking is completed, the annotation part of the shorter words is blocked by the baffle, which makes it inconvenient for teachers to use this baffle.

[0005] To this end, the present invention provides an interactive display device based on teaching. Summary of the invention

[0006] In order to make up for the deficiencies of the prior art, at least one technical problem raised in the background technology is solved.

[0007] The technical solution adopted by the present invention to solve the technical problem is as follows: the interactive display device based on teaching described in the present invention comprises a fixed bracket, a protective shell is arranged on the fixed bracket, and a screen is fixedly arranged inside the protective shell;

[0008] A distance adjustment component is arranged in the protective shell, and the distance adjustment component includes a shielding plate 1, a plurality of shielding plates 2 are slidably arranged in the shielding plate 1, and a reset plate is slidably arranged on one side of the shielding plate 1. By moving the shielding plate 1, the shielding plate 1 can cover the shortest word or comment, and by stretching the shielding plate 2, the rest can be covered.

[0009] Preferably, the distance adjustment assembly also includes a guide rod 1, which is symmetrically arranged, one guide rod 1 is fixed at the top of the protective shell, and the other guide rod 1 is fixed at the bottom of the protective shell, and the baffle plate 1 is slidably arranged between the two guide rods 1. The baffle plate 1 is symmetrically arranged, and each baffle plate 1 is fixedly connected to two sliding members at both ends, and the sliding member is composed of a U-shaped plate and two rollers, each roller rotates on the inner wall of the open end of the U-shaped plate, and each guide rod 1 is located between the two rollers at its corresponding end. When moving the baffle plate 1, the guide rod 1 is used to make the baffle plate 1 only perform horizontal linear motion, and the rollers on the sliding member make the movement more labor-saving.

[0010] Preferably, the shielding plate does not interfere with the screen.

[0011] Preferably, a plurality of transmission grooves are provided inside the shielding plate 1, a plurality of telescopic grooves are provided on one side of the shielding plate 1, the plurality of transmission grooves and the plurality of telescopic grooves are arranged in a linear array and correspond one to one, each transmission groove is connected to the telescopic groove, and the reset plate slides inside the shielding plate 1;

[0012] The second shielding plate slides inside the telescopic groove, and a transmission bevel gear rod 1 is rotatably connected inside the transmission groove. A rotating gear 1 is fixedly connected to the surface of the transmission bevel gear rod 1, and the transmission bevel gear rod 1 is meshed with the second shielding plate. By stretching the second shielding plate, the second shielding plate can shield the rest of the word or annotation.

[0013] Preferably, the reset plate is composed of two transverse slides and a vertical plate, the two transverse slides are respectively located at two ends of the vertical plate, and ends of the two transverse slides away from the shielding plate are fixed to the surface of the vertical plate.

[0014] Preferably, a transmission bevel gear rod 2 is rotatably connected in the transmission groove, the transmission bevel gear rod 2 is meshed with the transmission bevel gear rod 1, and a rotating gear 2 is fixedly connected to the surface of the transmission bevel gear rod 2. A rack rod is slidably connected in the transmission groove, and one end of each rack rod close to the reset plate is in contact with the reset plate. After stretching the baffle plate 2, the reset plate will be pushed out by the rack rod. When resetting, multiple gears with different extension lengths can be completely retracted by pressing down the reset plate.

[0015] Preferably, a transmission bevel gear 1 is fixed on the surface of the transmission bevel gear rod 1, a transmission bevel gear 2 is fixed at one end of the transmission bevel gear rod 2, and the transmission bevel gear 1 on the transmission bevel gear rod 1 is meshed with the transmission bevel gear 2 on the transmission bevel gear rod 2.

[0016] Preferably, a limiting assembly is provided at the bottom of the shielding plate, and the limiting assembly includes a limiting platform. The limiting platform is L-shaped and consists of a horizontal straight plate and a vertical straight plate, and one end of the horizontal straight plate is fixed to the top end of the vertical straight plate.

[0017] Preferably, the limiting assembly further comprises a circular ring sleeve 1, the circular ring sleeve 1 is fixed on a side surface of the vertical straight plate away from the protective shell, a limiting wedge block is symmetrically fixedly arranged inside the circular ring sleeve 1, and a circular ring sleeve 2 is fixedly connected to one side of the vertical straight plate;

[0018] The second circular sleeve is slidably connected with a guide rod second inside, the second circular sleeve is provided with a displacement groove one, the second guide rod is provided with a displacement groove two, the displacement groove one is communicated with the displacement groove two, the displacement groove one and the displacement groove two are slidably connected with a displacement block, the first circular sleeve is slidably connected with a pressing block, a spring is fixedly connected between the top of the second guide rod and the top of the pressing block, a limiting groove is provided on the surface of the pressing block, the end of the first circular sleeve away from the limiting platform is fixedly connected with a fixing rod, the fixing rod is rotatably connected with a limiting block, the shape of the limiting block matches the shape of the limiting groove, the limiting block is rotated so that it is no longer fixed to the pressing block, and then the second guide rod contacts the protective shell, so that the distance adjustment component is fixed.

[0019] Preferably, the displacement block is composed of two guide wedge blocks and a guide inclined block, the two guide wedge blocks are staggered and symmetrically arranged, the bottom end of one guide wedge block is fixed to the bottom end of the guide inclined block, the top of the other guide wedge block is fixed to the top end of the guide inclined block, the shape of the guide inclined block matches the displacement groove two, and the shapes of the two guide wedge blocks match the displacement groove one.

[0020] The beneficial effects of the present invention are as follows:

[0021] 1. The present invention moves shield plate 1 to cover the shortest word, and then stretches shield plate 2 to make shield plate 2 cover the unblocked part of the word, thereby blocking longer words while avoiding the problem of excessive blocking of annotations of shorter words, so that students can view the annotation content of all words. Furthermore, the annotations can be blocked, so that students can watch the words and write down the annotations of the corresponding words, which further improves the learning effect.

[0022] 2. The present invention resets all shielding plates 2 stretched out during interaction by pressing the reset plate, so that there is no need to reset shielding plates 2 one by one after the interaction is over, which reduces the teacher's workload, saves sorting time, and enables the teacher to proceed to the next step of teaching more quickly.

[0023] 3. The present invention uses a dynamic limit block to make the limit block no longer limit the pressing block, and under the action of the displacement block, the guide rod 2 is in conflict with the surface of the protective shell, so that the shielding plate 1 is fixed here, preventing the distance adjustment component from sliding when the shielding plate 2 is stretched, resulting in a reduced shielding effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The present invention will be further described below in conjunction with the accompanying drawings.

[0025] Figure 1 It is a schematic elevation diagram of the overall device of the present invention;

[0026] Figure 2 It is a rear view schematic diagram of the overall device of the present invention;

[0027] Figure 3 This is a schematic diagram of the position relationship between the protective shell and the guide rod of the present invention;

[0028] Figure 4 This is a schematic diagram of the position relationship between the shielding plate 1 and the sliding member of the present invention;

[0029] Figure 5 This is a schematic diagram of the position relationship between the shielding plate 1 and the limiting platform of the present invention;

[0030] Figure 6 It is a schematic diagram of the position relationship between the transmission bevel gear rod 1 and the rotating gear 1 of the present invention;

[0031] Figure 7 It is a partial structural schematic diagram of the distance adjustment component of the present invention;

[0032] Figure 8 It is a schematic diagram of the limiting component of the present invention;

[0033] Fig. 9 This is a schematic diagram of the position relationship between the pressing block and the spring of the present invention;

[0034] Fig.10 It is a partial structural schematic diagram of the limiting component of the present invention.

[0035] Reference numerals: 1, fixing bracket; 11, protective shell; 12, screen;

[0036] 2. Pitch adjustment assembly; 21. Guide rod 1; 22. Shield plate 1; 23. Sliding member; 24. Transmission slot; 25. Telescopic slot; 26. Shield plate 2; 27. Transmission bevel gear rod 1; 28. Rotating gear 1; 29. ​​Transmission bevel gear rod 2; 210. Rotating gear 2; 211. Rack rod; 212. Reset plate;

[0037] 3. Limiting assembly; 31. Limiting platform; 32. Circular ring sleeve 1; 33. Circular ring sleeve 2; 34. Guide rod 2; 35. Displacement slot 1; 36. Displacement slot 2; 37. Displacement block; 38. Pressing block; 39. Spring; 310. Limiting slot; 311. Fixing rod; 312. Limiting block. DETAILED DESCRIPTION

[0038] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0039] Embodiment 1

[0040] like Figures 1 to 10 As shown, an interactive display device based on teaching according to an embodiment of the present invention comprises a fixed bracket 1, a protective shell 11 is arranged on the fixed bracket 1, and a screen 12 is fixedly arranged inside the protective shell 11;

[0041] A distance adjustment component 2 is arranged in the protective shell 11, and the distance adjustment component 2 includes a baffle plate 22, and a plurality of baffle plates 26 are slidably arranged in the baffle plate 22. A reset plate 212 is slidably arranged on one side of the baffle plate 22. By moving the baffle plate 22, the baffle plate 22 can block the shortest word or comment, and the rest can be blocked by stretching the baffle plate 26.

[0042] The existing interactive display device still has some problems in actual use. Due to the different lengths of words, when multiple words and their annotations are displayed through the screen 12, the display lengths on the display will also be different. During the interaction, all words are blocked by moving the shielding plate 22. After the blocking is completed, the annotation part of the shorter words is blocked by the shielding plate 22, which makes it inconvenient for teachers to use this shielding plate 22.

[0043] Therefore, the present invention solves this problem by setting a corresponding structure. When blocking words or comments displayed on the screen 12, the reset plate 212 is pushed to move the shielding plate 22 so that the shielding plate 22 blocks the shortest words or comments, and then the shielding plates 26 are stretched one by one so that the stretched shielding plates 26 block the remaining words or comments.

[0044] Embodiment 2

[0045] like Figures 2 to 10 As shown, compared with Example 1, another implementation of the present invention is:

[0046] like Figures 2 to 6 As shown, the distance adjustment component 2 of this embodiment also includes a guide rod 21, and the guide rod 21 is symmetrically arranged. One guide rod 21 is fixed at the top of the protective shell 11, and the other guide rod 21 is fixed at the bottom of the protective shell 11. The baffle plate 22 is slidably arranged between the two guide rods 21. The baffle plates 22 are symmetrically arranged, and each baffle plate 22 does not interfere with the screen 12. Two sliding members 23 are fixedly connected at both ends of each baffle plate 22. The sliding member 23 consists of a U-shaped plate and two rollers, and each roller rotates on the inner wall of the open end of the U-shaped plate. Each guide rod 21 is located between the two rollers at its corresponding end. When the baffle plate 22 is moved, the guide rod 21 is used to make the baffle plate 22 only perform horizontal linear motion, and the rollers on the sliding member 23 make the movement more labor-saving.

[0047] Specifically, when the shielding plate 22 moves, the sliding member 23 moves under the guidance of the guide rod 21, so that the shielding plate 22 only moves horizontally and linearly. At the same time, the roller on the sliding member 23 makes the movement more labor-saving.

[0048] like Figures 2 to 7 As shown, in this embodiment, a plurality of transmission grooves 24 are provided inside the shielding plate 22, and a plurality of telescopic grooves 25 are provided on one side of the shielding plate 22. The plurality of transmission grooves 24 and the plurality of telescopic grooves 25 are arranged in a linear array and correspond one to one. Each transmission groove 24 is connected to the telescopic groove 25. The reset plate 212 slides inside the shielding plate 22. The reset plate 212 is composed of two horizontal slides and a vertical plate. The two horizontal slides are respectively located at the two ends of the vertical plate, and the ends of the two horizontal slides away from the shielding plate 22 are fixed to the surface of the vertical plate.

[0049] The baffle plate 26 slides inside the telescopic slot 25, and a transmission bevel gear rod 27 is rotatably connected inside the transmission slot 24. A rotating gear 28 is fixedly connected to the surface of the transmission bevel gear rod 27. The transmission bevel gear rod 27 is meshed with the baffle plate 26. By stretching the baffle plate 26, the baffle plate 26 can block the rest of the word or annotation.

[0050] Specifically, when the shielding plate 26 is stretched, the movement of the shielding plate 26 drives the transmission bevel gear rod 1 27 to rotate by rotating the gear 1 28 .

[0051] like Figures 2 to 7 As shown, in this embodiment, a transmission bevel gear rod 29 is rotatably connected in the transmission groove 24, and the transmission bevel gear rod 29 is meshed with the transmission bevel gear rod 1 27. A rotating gear 210 is fixedly connected to the surface of the transmission bevel gear rod 29. A rack rod 211 is slidably connected in the transmission groove 24. One end of each rack rod 211 close to the reset plate 212 is in contact with the reset plate 212. After stretching the shielding plate 26, the reset plate 212 will be pushed out by the rack rod 211. When resetting, the multiple gears with different extension lengths are completely retracted by pressing down the reset plate 212.

[0052] Specifically, when the transmission bevel gear rod 1 27 rotates, the transmission bevel gear rod 2 29 is driven to rotate by the rotation of the transmission bevel gear rod 1 27, so that the rotating gear 2 210 rotates synchronously, and the rack rod 211 is moved by the rotation of the rotating gear 210, so that the rack rod 211 contacts the reset plate 212, thereby causing the reset plate 212 to slide outward;

[0053] After the interaction is finished, the reset plate 212 is pressed, and through the above operation, the shielding plate 26 is reset, and then the shielding plate 1 22 is pushed to reset the shielding plate 1 22 .

[0054] The present invention moves the shield plate 1 22 to cover the shortest word, and then stretches the shield plate 2 26 to make the shield plate 26 cover the unblocked part of the word, thereby blocking the longer words while avoiding the problem of excessive blocking of the annotations of the shorter words, so that students can better view the annotation content of all words. Furthermore, the annotations can be blocked, so that students can look at the words and write down the corresponding annotations, which further improves the learning effect.

[0055] The present invention resets all the shielding plates 26 stretched out during the interaction by pressing the reset plate 212, so that there is no need to reset the shielding plates 26 one by one after the interaction is over, which reduces the teacher's workload, saves the time for sorting, and enables the teacher to carry out the next step of teaching more quickly.

[0056] like Figure 7 As shown, in this embodiment, a transmission bevel gear 1 is fixed on the surface of the transmission bevel gear rod 1 27, and a transmission bevel gear 2 is fixed at one end of the transmission bevel gear rod 29. The transmission bevel gear 1 on the transmission bevel gear rod 1 27 is meshed with the transmission bevel gear 2 on the transmission bevel gear rod 29.

[0057] Specifically, the gear ratio between the transmission bevel gear 1 and the transmission bevel gear 2 is 1:3, and the transmission bevel gear rod 1 27 and the transmission bevel gear rod 2 29 are mutually transmitted through the meshing of the transmission bevel gear 1 and the transmission bevel gear 2.

[0058] like Figure 3 , Figure 5 and Figures 8 to 10 As shown, in this embodiment, a limit assembly 3 is provided at the bottom of the shielding plate 22, and the limit assembly 3 includes a limit platform 31. The limit platform 31 is L-shaped and consists of a horizontal straight plate and a vertical straight plate. One end of the horizontal straight plate is fixed to the top end of the vertical straight plate.

[0059] The limiting assembly 3 also includes a circular ring sleeve 1 32, which is fixed on the side surface of the vertical straight plate away from the protective shell 11, and a limiting wedge block is symmetrically fixed inside the circular ring sleeve 1 32, and a circular ring sleeve 2 33 is fixedly connected to one side of the vertical straight plate;

[0060] A guide rod 2 34 is slidably connected inside the annular sleeve 2 33 , a displacement groove 1 35 is provided on the annular sleeve 2 33 , a displacement groove 2 36 is provided on the guide rod 2 34 , the displacement groove 1 35 is connected to the displacement groove 2 36 , and a displacement block 37 is slidably connected inside the displacement groove 1 35 and the displacement groove 2 36 ;

[0061] The displacement block 37 is composed of two guide wedge blocks and a guide inclined block. The two guide wedge blocks are staggered and symmetrically arranged. The bottom end of one guide wedge block is fixed to the bottom end of the guide inclined block, and the top of the other guide wedge block is fixed to the top end of the guide inclined block. The shape of the guide inclined block matches the displacement groove 2 36, and the shapes of the two guide wedge blocks match the displacement groove 1 35.

[0062] A pressing block 38 is slidably connected inside the circular ring sleeve 32, a spring 39 is fixedly connected between the top of the guide rod 2 34 and the top inside the pressing block 38, a limiting groove 310 is provided on the surface of the pressing block 38, and a fixing rod 311 is fixedly connected to the end of the circular ring sleeve 32 away from the limiting platform 31, and a limiting block 312 is rotatably connected to the fixing rod 311, and the shape of the limiting block 312 matches the shape of the limiting groove 310. By rotating the limiting block 312, the pressing block 38 is no longer fixed, so that the guide rod 2 34 contacts the protective shell 11, so that the distance adjustment component 2 is fixed.

[0063] Specifically, in the initial state, the spring 39 is elastically compressed, the spring 39 has high elasticity, the limit block 312 is located inside the limit groove 310, one end of the pressing block 38 is in conflict with the surface of the vertical straight plate, the guide rod 34 passes through the vertical straight plate, and the guide wedge block fixed at the bottom of the guide inclined block is in conflict with the surface of the guide rod 34;

[0064] After the shielding plate 1 22 blocks the shortest word or comment, the limit block 312 is rotated so that the limit block 312 no longer limits the pressing block 38. At this time, the spring 39 is elastically released, so that the pressing block 38 moves in the direction away from the annular sleeve 2 33. During the movement of the pressing block 38, the wedge block in the pressing block 38 moves upward synchronously, so that the guide wedge block fixed to the top of the guide inclined block on the displacement block 37 moves in the direction close to the other guide wedge block under the limiting action of the displacement groove 1 35 and the displacement groove 2 36, and drives the guide rod 2 34 to move in the direction close to the protective shell 11, until the guide wedge block fixed to the top of the guide inclined block and the surface of the guide rod 2 34 conflict, and the guide rod 2 34 conflicts with the surface of the protective shell 11, so that the shielding plate 1 22 is fixed here, to prevent the problem of sliding of the distance adjustment component 2 and reducing the shielding effect when the shielding plate 26 is stretched;

[0065] When there is no need to fix the baffle plate 1 22 , the pressing block 38 is pressed. Through the above operation, the guide rod 2 34 is contracted so that it does not conflict with the inner wall of the protective shell 11 . Then, the limiting block 312 is rotated to enter the limiting groove 310 , thereby limiting the pressing block 38 .

[0066] The present invention uses the movable limit block 312 to make the limit block 312 no longer limit the pressing block 38, and under the action of the displacement block 37, the guide rod 2 34 is in conflict with the surface of the protective shell 11, so that the baffle plate 1 22 is fixed here, preventing the distance adjustment component 2 from sliding when the baffle plate 26 is stretched, thereby preventing the shielding effect from being reduced.

[0067] Working principle:

[0068] When shielding a word or comment displayed on the screen 12, the shielding plate 22 is moved by pushing the reset plate 212. When the shielding plate 22 moves, the sliding member 23 moves under the guidance of the guide rod 21, so that the shielding plate 22 only moves horizontally and linearly until the shielding plate 22 shields the shortest word or comment;

[0069] At this time, by rotating the limit block 312, the limit block 312 no longer limits the pressing block 38. At this time, the spring 39 is elastically released, so that the pressing block 38 moves in the direction away from the annular sleeve 33. During the movement of the pressing block 38, the wedge block in the pressing block 38 moves upward synchronously, so that the guide wedge block fixed to the top of the guide inclined block on the displacement block 37 moves in the direction close to the other guide wedge block under the limiting action of the displacement groove 1 35 and the displacement groove 2 36, and drives the guide rod 2 34 to move in the direction close to the protective shell 11, until the guide wedge block fixed to the top of the guide inclined block and the surface of the guide rod 2 34 conflict, and the guide rod 2 34 conflicts with the surface of the protective shell 11, so that the shielding plate 1 22 is fixed here;

[0070] Then, the shielding plates 26 are stretched one by one, so that the stretched shielding plates 26 cover the remaining words or annotations;

[0071] In the process of stretching the shielding plate 26, the transmission bevel gear rod 29 is driven to rotate by the rotation of the transmission bevel gear rod 1 27, so that the rotating gear 210 rotates synchronously, and the rack rod 211 is moved by the rotation of the rotating gear 210, so that the rack rod 211 contacts the reset plate 212, thereby causing the reset plate 212 to slide outward;

[0072] After the interaction is finished, the reset plate 212 is pressed, and through the above operation, the shielding plate 26 is reset, and then the shielding plate 1 22 is pushed to reset the shielding plate 1 22 .

[0073] The above shows and describes the basic principles, main features and advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. An interactive display device based on teaching, comprising a fixed bracket (1), a protective shell (11) being arranged on the fixed bracket (1), a screen (12) being fixedly arranged inside the protective shell (11), characterized in that: The protective shell (11) is provided with a distance adjustment component (2), the distance adjustment component (2) comprising a shielding plate (22), a plurality of shielding plates (26) being slidably arranged inside the shielding plate (22), a reset plate (212) being slidably arranged on one side of the shielding plate (22), and the shielding plate (22) is moved so that the shielding plate (22) blocks the shortest word or comment, and the shielding plate (26) is stretched so as to block the rest.

2. The teaching-based interactive display device according to claim 1, characterized in that: The distance adjustment component (2) further comprises guide rods (21), wherein the guide rods (21) are symmetrically arranged, wherein one guide rod (21) is fixed at the top of the protective shell (11), and the other guide rod (21) is fixed at the bottom of the protective shell (11). The shielding plate (22) is slidably arranged between the two guide rods (21). The shielding plate (22) is symmetrically arranged, and each shielding plate (22) is fixedly connected to two sliding members (23) at both ends. The sliding member (23) is composed of a U-shaped plate and two rollers, and each roller rotates on the inner wall of the opening end of the U-shaped plate. Each guide rod (21) is located between the two rollers at its corresponding end. When the shielding plate (22) is moved, the guide rod (21) causes the shielding plate (22) to only perform horizontal linear motion, and the rollers on the sliding member (23) make the movement more labor-saving.

3. The teaching-based interactive display device according to claim 2, characterized in that: The shielding plate 1 (22) does not interfere with the screen (12).

4. The teaching-based interactive display device according to claim 2, characterized in that: A plurality of transmission grooves (24) are provided inside the shielding plate (22), and a plurality of telescopic grooves (25) are provided on one side of the shielding plate (22). The plurality of transmission grooves (24) and the plurality of telescopic grooves (25) are arranged in a linear array and correspond one to one. Each transmission groove (24) is connected to the telescopic groove (25), and the reset plate (212) slides inside the shielding plate (22); The shielding plate 2 (26) slides inside the telescopic slot (25), and a transmission bevel gear rod 1 (27) is rotatably connected inside the transmission slot (24). A rotating gear 1 (28) is fixedly connected to the surface of the transmission bevel gear rod 1 (27). The transmission bevel gear rod 1 (27) is meshed with the shielding plate 2 (26). By stretching the shielding plate 2 (26), the shielding plate 2 (26) shields the rest of the word or annotation.

5. The teaching-based interactive display device according to claim 4, characterized in that: The reset plate (212) is composed of two transverse slides and a vertical plate. The two transverse slides are respectively located at two ends of the vertical plate, and the ends of the two transverse slides away from the shielding plate (22) are fixed to the surface of the vertical plate.

6. The teaching-based interactive display device according to claim 4, characterized in that: A second transmission bevel gear rod (29) is rotatably connected in the transmission groove (24), the second transmission bevel gear rod (29) meshes with the first transmission bevel gear rod (27), a second rotating gear (210) is fixedly connected to the surface of the second transmission bevel gear rod (29), a rack rod (211) is slidably connected in the transmission groove (24), one end of each rack rod (211) close to the reset plate (212) is in contact with the reset plate (212), after the second shielding plate (26) is stretched, the reset plate (212) is pushed out by the rack rod (211), and when resetting, the reset plate (212) is pressed down so that a plurality of racks with different extension lengths are completely retracted.

7. The teaching-based interactive display device according to claim 6, characterized in that: A transmission bevel gear 1 is fixed on the surface of the transmission bevel gear rod 1 (27), and a transmission bevel gear 2 is fixed on one end of the transmission bevel gear rod 2 (29). The transmission bevel gear 1 on the transmission bevel gear rod 1 (27) is meshed with the transmission bevel gear 2 on the transmission bevel gear rod 2 (29).

8. The teaching-based interactive display device according to claim 2, characterized in that: A limiting component (3) is arranged at the bottom of the shielding plate 1 (22), and the limiting component (3) comprises a limiting platform (31). The limiting platform (31) is L-shaped and consists of a horizontal straight plate and a vertical straight plate, and one end of the horizontal straight plate is fixed to the top end of the vertical straight plate.

9. The teaching-based interactive display device according to claim 8, characterized in that: The limiting assembly (3) further comprises a circular ring sleeve (32), the circular ring sleeve (32) being fixed on a side surface of the vertical straight plate away from the protective shell (11), a limiting wedge block being symmetrically fixedly arranged inside the circular ring sleeve (32), and a circular ring sleeve (33) being fixedly connected to one side of the vertical straight plate; The second circular sleeve (33) is slidably connected with a second guide rod (34), the second circular sleeve (33) is provided with a first displacement groove (35), the second guide rod (34) is provided with a second displacement groove (36), the first displacement groove (35) is communicated with the second displacement groove (36), a displacement block (37) is slidably connected in the first displacement groove (35) and the second displacement groove (36), the first circular sleeve (32) is slidably connected with a pressing block (38), the top end of the second guide rod (34) is fixedly connected to the top end of the pressing block (38) A spring (39) is provided, a limiting groove (310) is provided on the surface of the pressing block (38), one end of the annular sleeve (32) away from the limiting platform (31) is fixedly connected to a fixing rod (311), the fixing rod (311) is rotatably connected to a limiting block (312), the shape of the limiting block (312) matches the shape of the limiting groove (310), the limiting block (312) is rotated so that it no longer fixes the pressing block (38), thereby causing the second guide rod (34) to contact the protective shell (11), so that the distance adjustment component (2) is fixed.

10. The teaching-based interactive display device according to claim 9, characterized in that: The displacement block (37) is composed of two guide wedge blocks and a guide inclined block. The two guide wedge blocks are staggered and symmetrically arranged. The bottom end of one guide wedge block is fixed to the bottom end of the guide inclined block, and the top end of the other guide wedge block is fixed to the top end of the guide inclined block. The shape of the guide inclined block matches the second displacement groove (36), and the shapes of the two guide wedge blocks match the first displacement groove (35).

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