Multimedia interactive teaching machine

Abstract

The invention belongs to the technical field of optical adjustment, and particularly relates to a multimedia interactive teaching machine which is characterized in that replacement modules are symmetrically arranged at the bottom end of a display, a cleaning module is arranged at one side end of the display, a dustproof module is arranged at the other side end of the display, and an adjustment module is arranged between the replacement modules; according to the invention, dual cleaning operations of scraping and wiping are carried out on the display screen through the angle shovel and the anti-static sponge, so that the cleanliness of the display screen can be fully ensured; in the process, the board dust cabin is used for specifically adsorbing the dust overflowing in the scraping process of the corner shovel, and the dust is collected by the dust collecting pipe, so that the dust-free property of the teaching environment is improved; besides, in a non-teaching state, the roller shutter can be pulled out step by step through the adsorbability between the closing strip and the iron plate until the screen of the display is completely covered, so that the screen of the display is protected from the outside in a separated manner, the short circuit phenomenon of the display is fully reduced, and meanwhile, the display definition of the display is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of optical adjustment, and in particular relates to a multimedia interactive teaching machine. Background Art

[0002] Multimedia interactive teaching machine: It can display all teaching contents on a large LCD screen in a graphic and textual manner, which has the advantages of flexibility, time-saving, labor-saving and lifelike images. At the same time, an important feature of interactive teaching is the participation of students. It emphasizes the two-way communication between teachers and students, fully mobilizes the enthusiasm and initiative of both parties, thus livening up the classroom atmosphere and achieving the best benefits of both teaching and learning. The reflection of light is divided into specular reflection and diffuse reflection: Specular reflection: when parallel light hits a smooth reflective surface, the reflected light is still reflected in parallel; Diffuse reflection: when parallel light hits a rough reflective surface, the light is reflected in all directions; Traditional wall-mounted or embedded multimedia teaching machines have the following problems during use: 1. Due to the special characteristics of the classroom environment, a large amount of dust or other impurities are deposited on the surface of the multimedia display. On the one hand, it reduces the amount of light reflected and transmitted, that is, it increases reflective astigmatism and reduces the screen contrast; in this process, it also changes the propagation path of light, reduces the focusing, and then causes the picture to be blurred, affecting the teaching quality and endangering the user's eye health; in addition, at the moment when the display is turned on and off, the presence of dust increases the probability of static electricity, which in turn increases the probability of the display short circuit, resulting in increased teaching costs; 2. Affected by external light or changes in light during the interaction between the teacher and the teaching machine, the field of vision of users at other angles changes, that is, mirror reflection or highlight occurs in local areas, resulting in an increase in harmful light received by the user, which is not conducive to the user's viewing and learning, and may even cause irreversible harm to the user's eyes. Summary of the invention

[0003] In order to achieve the above object, the present invention adopts the following technical scheme: a multimedia interactive teaching machine, comprising a display, wherein a replacement module is symmetrically arranged at the bottom of the display, a cleaning module is arranged at one side of the display, a dustproof module is arranged at the other side of the display, and an adjustment module is arranged between the replacement modules; The adjustment module comprises: The box is black and is movably set at the bottom of the display, and has a hollow structure inside; The chuck is embedded and installed in the middle of the side wall at one end of the box; The bracket is installed on the end surface of the chuck away from the cartridge box through the connecting shaft; The pin disc is rotatably mounted in the middle of the bracket, and penetrates the outer wall of the chuck and the box at one side, and has a cross-shaped cross section; The lamp tube is threadedly mounted on the axis of one end of the pin disc away from the bracket; The branch pipe frame is coaxially mounted on the outer wall of one end of the pin plate near the middle of the box, and the branch pipe frame is inside the box; A ratchet pawl is rotatably mounted on an end of the bracket away from the chuck through a torsion spring; The ratchet wheel is coaxially fixedly mounted on the outer wall of the pin disc away from the box and cooperates with the pawl; The screw cap is snap-fitted and installed on the end of the pin disc away from the magazine box.

[0004] Preferably, the other end of the bracket away from the end surface of one side of the chuck is symmetrically installed with an end plate, a spring rod is slidably mounted between the two end plates, and a semi-closed ring is mounted on one end of the spring rod close to the axis of the pin disk.

[0005] Preferably, the branch rack is fixedly installed with a pillow block at one end away from the chuck, the cross-sectional shape of the pillow block is T-shaped, and a telescopic pad is clamped and installed at the axial center position of the end face of the pillow block close to the chuck, and the branch rack is evenly distributed with columns at one end away from the chuck, and there are three of them, and a sub-turntable is plugged and installed at the end of the column away from the chuck, which is rotatably matched with the side wall of the cartridge box, and a fixing disk is slidably installed at the middle position of the outer walls of the three columns, and the fixing disk consists of two parts, namely, an axial circular segment and an outer circular ring segment, and the circular segment and the circular ring segment are rotatably matched. A pin is slidably clamped and installed at the axial center position of the sub-turntable, and a slot matching the pin is provided on the end face of the sub-turntable close to the fixing disk, and a reset spring is provided on the outer wall of the column and is fixedly connected to the fixing disk and the sub-turntable at the same time. There are three filters evenly distributed on the outer wall of the branch rack along its circumference.

[0006] Preferably, a movable seat is symmetrically installed in a sliding and snap-fitting manner at the end of the box away from the display, a connecting rod is rotatably installed between the two movable seats, a dimming plate is fixedly installed on the outer wall of the connecting rod, and side gears are fixedly installed on the outer walls of both ends of the connecting rod. Side racks that cooperate with the side gears are symmetrically installed on the end of the box away from the display, and a telescopic bottom plate is slidably installed on the bottom end of the box away from the display through a spring.

[0007] Preferably, the replacement module comprises: The side rails have an L-shaped cross section and are symmetrically snap-fitted on both sides of the bottom of the display; The corner bracket is detachably mounted on the back of the bottom end of the display by means of bolts, and is mounted by snap-fitting between the side rails on the same side; The connecting plate is slidably mounted in the middle of the horizontal section of the side rail; The bottom engaging rack is mounted on the end surface of the docking plate close to the display; The outer rotating rod is rotatably installed in the middle position of the vertical section of the side rail; The main gear is fixedly mounted on the outer wall of one end of the outer rotating rod close to the bottom rack; The top gear rack is arranged directly above the bottom gear rack and cooperates with the main gear rack; There is one receiving box, which is snap-fitted and installed between the two connecting plates. In addition, the magazine is installed by sliding and snap-fitting with the receiving box through the rotating shaft.

[0008] Preferably, the cleaning module comprises: The bottom edge bar is snap-fitted and installed at the bottom of the display, and is snap-fitted and installed with the top rack at the same time; The top bar is mounted on the top of the display through the reinforcing rib snap-fit ​​and cooperates with the bottom side bar; The tooling plate is installed by sliding snap-fitting at the middle position of the end surface of the top strip near the bottom edge strip, and is also installed by sliding snap-fitting with the bottom edge strip; A partition plate is mounted at the middle of the end surface of the tooling plate away from the display by snap-fitting; The dust collecting pipe is mounted at the middle position of the end surface of one side of the partition plate by snap-fitting; The board dust cabin has a right-angle trapezoidal cross-section and is mounted on the end surface of the tooling board close to the display and is connected to the dust collecting pipe; The mouth strip is installed by snap-fitting in the middle position of the end surface of the tooling plate close to the display.

[0009] Preferably, the mouth strip is evenly distributed in an array at one end near the display with retractable short shafts installed in sliding engagement with it, and one retractable short shaft is installed with an angle shovel at one end near the display, and a page plate is installed with the end face of the tooling plate near the display, and the page plate is symmetrically distributed with the dust compartment, and an anti-static sponge is installed with the end of the page plate near the display with the center line of the tooling plate as a reference.

[0010] Preferably, the dustproof module comprises: There are two external ear seats, which are symmetrically mounted on the side wall of one end of the display; A guide roller, rotatably mounted between two external ear seats; There are two inner ear seats, which are symmetrically mounted on the side wall of one end of the display and belong to the same side as the outer ear seat; The winding roller is installed between the inner ear seats by rotating it through a spring; A rolling curtain, which is sleeved on the outer wall of the winding roller; The joint strip is installed on the outer wall of the roller shutter interface end and is made of magnet; The iron plate is clamped and installed at the middle position of the end surface of the partition plate on the side away from the dust collecting pipe.

[0011] Preferably, the paging plate has a right-angle chamfered structure at one end close to the wedge plate.

[0012] A method for cleaning, dustproofing and light-filling the surface of a multimedia interactive teaching machine, using the above-mentioned multimedia interactive teaching machine to achieve cleaning, dustproofing and light-filling, the specific steps are as follows: S1: First, the tooling board synchronously drives the angle shovel and anti-static sponge to scrape and wipe the dust deposited on the display screen. At the same time, the dust flowing in the air is recovered into the dust collection pipe through the adsorption effect of the board dust cabin, which helps to improve the air quality in the classroom; S2: Then, the pin plate is controlled by rotating the cap to drive the branch frame to adjust the position of the filter. At the same time, through the linkage between the side rack and the side gear, the connecting rod drives the dimming plate to make corresponding angle changes, so as to cooperate with the filter to implement fill light for the bright or dark area of ​​the display; S3: Finally, the rolling curtain is fully covered to the display through the clamping connection between the joint strip and the iron plate, as well as the traction of the tooling plate and the guidance of the guide roller.

[0013] The present invention has the following beneficial effects: 1. The present invention synchronously controls the angle shovel and anti-static sponge to perform double cleaning operations of scraping and wiping the display screen through the reciprocating traction motion of the workpiece seat, which helps to fully ensure the cleanliness of the display screen; in this process, the dust scattered during the diagonal scraping process is adsorbed by the plate dust cabin in a targeted manner, and the dust is collected by the dust collecting pipe, which helps to improve the dust-freeness of the teaching environment; in addition, in a non-teaching state, the roller blind can be gradually pulled out through the adsorption between the combination strip and the iron plate until it completely covers the display screen, thereby providing disconnected protection for the display screen from the outside world, fully reducing the short circuit phenomenon of the display, and improving the display clarity of the display.

[0014] 2. The present invention drives the branch frame to rotate synchronously under the control of the rotary cap through the pin disk, and then adjusts the position of the filters with different light filtering properties. In this process, the angle between the dimming plate and the axis of the lamp tube can be adjusted accordingly through the linkage between the side gear and the side rack, and then the light intensity of the lamp irradiating the display screen can be further changed, which helps to enhance the flexibility and diversity of the adjustment module in adjusting the light source, thereby fully reducing the local highlight phenomenon on the display screen, protecting the user's eyes, reducing the mirror reflection of the display, and improving the picture color, sharpness and teaching quality.

[0015] 3. The present invention flexibly controls the vertical distance between the setting plate and the chuck through the pin, which is convenient for users to replace filters or lamps, and helps to improve the practicality and scene application of the product. At the same time, through the elasticity of the telescopic pad itself, the rigid clamping of the lamp by the pin plate and the shaft table is changed, which, on the one hand, helps to increase the service life of the lamp; on the other hand, reduces the difficulty of replacing the lamp. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the present invention from the first perspective (cleaning module is displayed).

[0017] Figure 2 This is another viewing angle display diagram of the overall structure of the present invention (adjustment module display).

[0018] Figure 3 The present invention is attached Figure 2 A schematic diagram of the enlarged local structure in the middle.

[0019] Figure 4 The present invention is attached Figure 1 Right view of the structure.

[0020] Figure 5 It is a plan view of the operation coordination between the cleaning module of the present invention and the display.

[0021] Figure 6 The present invention is attached Figure 5 An enlarged view of the local structure at point B in the middle.

[0022] Figure 7 It is a diagram showing the local structure of the cleaning module of the present invention.

[0023] Figure 8 It is a cross-sectional view showing the local structure of the replacement module of the present invention.

[0024] Fig. 9 It is a cross-sectional view showing the local structure of the replacement module of the present invention from another viewing angle.

[0025] Fig.10 It is a three-dimensional display diagram of the adjustment module of the present invention.

[0026] Fig.11 It is a three-dimensional structure display diagram of the box of the present invention.

[0027] Fig.12 The present invention is attached Fig.10 The three-dimensional display diagram of the rear structure of the box is omitted.

[0028] Fig.13 The present invention is attached Fig.12 The plan view of the structure after removing the filter.

[0029] Fig.14It is a diagram showing the assembly structure between the sub-turntable and the latch of the present invention.

[0030] Fig.15 The present invention is attached Fig.14 The structure is shown from another perspective.

[0031] Numbers in the figure: 1, display; 2, replacement module; 3, cleaning module; 4, dust prevention module; 5, adjustment module; 21. Side rails; 22. Angle bracket; 23. Connecting plate; 24. Bottom rack; 25. External rotating rod; 26. Main gear; 27. Top rack; 28. Storage box; 31. Bottom edge strip; 32. Top strip; 33. Tooling board; 34. Partition board; 35. Dust collecting pipe; 36. Board dust compartment; 37. Mouth strip; 331, retractable short shaft; 332, angle shovel; 333, leaf plate; 334, antistatic sponge; 41. External ear seat; 42. Guide roller; 43. Internal ear seat; 44. Winding roller; 45. Rolling curtain; 46. Joint strip; 47. Iron plate; 51. Box; 52. Chuck; 53. Bracket; 54. Pin plate; 55. Lamp tube; 56. Branch rack; 57. Ratchet; 58. Ratchet; 59. Screw cap; 531, end plate; 532, spring rod; 533, half ring; 561, pillow block; 562, telescopic pad; 563, column; 564, sub-rotating plate; 565, fixing plate; 566, latch; 567, card slot; 568, reset spring; 569, filter; 511, movable seat; 512, connecting rod; 513, dimming plate; 514, side gear; 515, side rack; 516, telescopic bottom plate. DETAILED DESCRIPTION

[0032] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0033] It should be noted that the terms “vertical”, “horizontal”, “left”, “right” and similar expressions used in this document are only for the purpose of explanation and do not represent the only implementation method.

[0034] The specific implementation of the present invention is described in detail below in conjunction with specific embodiments.

[0035] Reference Figure 1 and Figure 2It can be seen that a multimedia interactive teaching machine includes a display 1, a replacement module 2 is symmetrically arranged at the bottom of the display 1, a cleaning module 3 is arranged at one side of the display 1, a dustproof module 4 is arranged at the other side of the display 1, and an adjustment module 5 is arranged between the replacement modules 2; Reference Figure 1 , Figure 3 , Figure 8 and Fig. 9 It can be seen that the replacement module 2 includes: side rails 21, which are L-shaped in cross section and are symmetrically mounted on both sides of the bottom of the display 1; corner brackets 22, which are detachably mounted on the back of the bottom of the display 1 by bolts, and are mounted in a snap-fit ​​manner with the side rails 21; a connecting plate 23, which is slidably mounted in the middle of the horizontal section of the side rail 21; a bottom rack 24, which is snap-fitted and mounted on the end surface of the connecting plate 23 close to the display 1; an outer rotating rod 25, which is rotatably mounted in the middle of the vertical section of the side rail 21 The main gear 26 is fixedly mounted on the outer wall of the outer rotating rod 25 near one end of the bottom rack 24; the top rack 27 is arranged just above the bottom rack 24 and cooperates with the main gear 26; the receiving box 28 is one in number and is mounted between the two connecting plates 23 by snap-fitting. In addition, the cassette 51 is mounted by sliding snap-fitting with the receiving box 28 through the rotating shaft; the top strip 32 is mounted on the top of the display 1 by snap-fitting with the reinforcing ribs and cooperates with the bottom strip 31;

[0036] Cleaning module 3 and adjustment module 5 position replacement process: Assume that in the initial state, the adjustment module 5 is located outside the bottom end of the display 1; When the cleaning module 3 is needed to clean the screen of the display 1, the specific implementation process of the replacement module 2 is as follows: Under the control of the outer rotating rod 25, the main gear 26 synchronously drives the top engaging rack 27 and the bottom engaging rack 24 to move in opposite directions until the receiving box 28 is directly below the display 1 (the docking plate 23 controls the stable movement of the receiving box 28 under the dual effects of the bottom engaging rack 24 and the guiding support of the side rail 21). In specific implementation, the outer rotating rod 25 can be driven to rotate by an external micro motor, or the user can manually adjust the rotation of the outer rotating rod 25 by an external knob. At this time, the cleaning module 3 (except the top bar 32) can be snapped to the top bar 32, that is, the cleaning module 3 (except the top bar 32 is detachable relative to the display 1, on the one hand, it is convenient for the user to operate, enhance the user experience and cleaning accuracy, and on the other hand, it is convenient for later maintenance and care); Similarly, when the adjustment module 5 is needed, the operator controls the outer rotating rod 25 to rotate in the opposite direction by a specified number of circles or angles until the receiving box 28 is completely close to the end surface of one side of the display 1 and is tangent to the display 1; It is hereby explained that the cleaning module 3 can be disassembled or not according to the user's will, that is, the work of the cleaning module 3 and the adjustment module 5 does not conflict (the top strip 32 can guide the cleaning module 3 and also support and limit the cleaning module 3. In specific implementation, the movement of the cleaning module 3 can be controlled by an electric slider or by the user manually dragging the cleaning module 3 to move); Corner bracket 22: enhances the connection stability between the side rail 21 and the display 1, thereby ensuring the long-term effectiveness of the operation of the replacement module 2.

[0037] Reference Figure 1 , Figure 5 , Figure 6 and Figure 7 It can be seen that the cleaning module 3 includes: a bottom edge strip 31, which is snap-fitted and installed at the bottom of the display 1, and is snap-fitted and installed with the top rack 27; a tooling plate 33, which is slidably snap-fitted and installed at the middle position of the end surface of the top strip 32 close to the bottom edge strip 31, and is slidably snap-fitted and installed between the bottom edge strip 31; a partition plate 34, which is snap-fitted and installed at the middle position of the end surface of the tooling plate 33 away from the display 1; a dust collecting pipe 35, which is snap-fitted and installed at the middle position of the end surface of one side of the partition plate 34; a plate dust cabin 36, which has a right-angled trapezoidal cross-section and is snap-fitted and installed at the end surface of the tooling plate 33 close to the display 1, and is connected to the dust collecting pipe 35; a mouth strip 37, which is snap-fitted and installed at the middle position of the end surface of the tooling plate 33 close to the display 1; Reference Figure 5 and Figure 6 It can be seen that the end of the mouth strip 37 near the display 1 is uniformly distributed in an array with retractable short shafts 331 installed with sliding snap-fitting therewith, and the end of the retractable short shaft 331 near the display 1 is snap-fitted with an angle shovel 332, and the number is one, and the end face of the tooling plate 33 near the display 1 is snap-fitted with a page plate 333, and the page plate 333 is symmetrically distributed with the plate dust chamber 36, and the end of the page plate 333 near the display 1 is snap-fitted with an anti-static sponge 334 based on the center line of the tooling plate 33; Reference Figure 2 , Figure 3 and Figure 5 It can be seen that the dustproof module 4 includes: two external ear seats 41, which are symmetrically clamped and installed on the side wall of one end of the display 1; a guide roller 42, which is rotatably installed between the two external ear seats 41; two inner ear seats 43, which are symmetrically clamped and installed on the side wall of one end of the display 1 and belong to the same side as the external ear seats 41; a winding roller 44, which is rotatably installed between the inner ear seats 43 through a spring; a roller curtain 45, which is sleeved on the outer wall of the winding roller 44; a joint strip 46, which is clamped and installed on the outer wall of the interface end of the roller curtain 45 and is made of a magnet; an iron plate 47, which is clamped and installed in the middle position of the end surface of the partition plate 34 away from the dust collecting pipe 35.

[0038] The bottom side bar 31 moves synchronously with the top rack 27, that is, the movement direction is opposite to that of the receiving box 28, and the bottom side bar 31 can cooperate with the top bar 32 to provide auxiliary support for the tooling plate 33 (equivalent to the entire cleaning module 3 (excluding the bottom side bar 31 and the top bar 32)), thereby enhancing the working stability and accuracy of the cleaning module 3; Shutdown status: Specific working process of cleaning module 3: The plate dust chamber 36 (the plate dust chamber 36 absorbs the dust in the operation process of the angle shovel 332 and in the air in real time and accurately. The shape and layout of the plate dust chamber 36 can be found in the attached Figure 6 1c structure display), angle shovel 332 and anti-static sponge 334 (the shape of anti-static sponge 334 is maintained by leaf plate 333 to increase its service life and reduce cleaning cost) synchronously follow tooling plate 33 to make reciprocating motion, which can be driven by electric slider to reciprocate the tooling plate 33, or by user manually pulling the partition plate 34 to drive the tooling plate 33 to move; Set the tooling plate 33 to move from right to left (with the attached Figure 1 The positive direction of the middle display 1 is the direction reference); Hereby note: The interface of the end face of display 1 is designed with conventional chamfer (for details, please refer to the attached Figure 6 Middle 1a area); When the tooling plate 33 moves, the antistatic sponge 334 (to avoid static electricity during wiping and reduce static electricity accumulation) is located on the right side of the angle shovel 332 (also made of antistatic material) (see the attached Figure 6 ), and the sponge itself has a certain elasticity, so the antistatic sponge 334 can fully wipe and clean the corner area of ​​the display 1; thereafter, the corner shovel 332 (the corner shovel 332 is attached Figure 6 Move from position 1a to position 1c in the figure to scrape and clean the dust on the screen area of ​​display 1 (refer to the attached Figure 5 or attached Figure 6 The shape of the middle angle shovel 332, that is, the angle shovel 332 is a non-standard part, which is used to scrape and clean the screen of the display 1 in a targeted manner); Solution and purpose of improving the scraping flexibility of the angle shovel 332: By changing the rigid contact scheme between the angle shovel 332 and the display 1 through the retractable short shaft 331 (i.e., when the retractable short shaft 331 is subjected to the reverse force of the angle shovel 332, it retracts toward the tooling plate 33 under the support and guidance of the opening strip 37, and conversely, the retractable short shaft 331 drives the angle shovel 332 to move toward the display 1), it can avoid the probability of damage to the display 1 caused by the interaction force between the angle shovel 332 and the display 1 exceeding the range, and can also ensure the scraping effect of the angle shovel 332 on the screen of the display 1; Specific working process of dust prevention module 4 (when the machine is shut down and cleaning module 3 completes its work): The tooling plate 33 moves toward the outer ear seat 41 until the joint strip 46 and the iron plate 47 are just connected; After the joint strip 46 and the iron plate 47 are bonded, the iron plate 47 is driven to move again through the tooling plate 33. During this process, the iron plate 47 pulls the rolling curtain 45 to gradually separate from the winding roller 44 (the winding roller 44, under the action of the spring, causes the rolling curtain 45 and the winding roller 44 to always be in a tightened state) and the rolling state (from the winding state to the flat state), until the rolling curtain 45 completely covers the screen of the display 1, directly blocking the flow path between the screen of the display 1 and the external dust, thereby reducing the accumulation of dust on the screen of the display 1; Those skilled in the art should understand that the cooperation between the joint strip 46 and the iron plate 47 is only one means of unfolding the rolling curtain 45, and this means is not the only one. The rolling curtain 45 can also be opened by the cooperation between the buckle and the snap ring (not shown in this embodiment); It is hereby explained that the guide roller 42 is tangent to the front end face of the display 1. On the one hand, it guides the rolling curtain 45 in motion; on the other hand, it reduces the friction between the rolling curtain 45 and the display 1 to further avoid static electricity accumulation, while also minimizing the gap between the rolling curtain 45 and the display 1 when it is unfolded, thereby fully ensuring the covering of the rolling curtain 45 on the display 1.

[0039] Reference Figure 1 , Fig.10 , Fig.12 and Fig.13 It can be seen that the adjustment module 5 includes: a box 51, which is black and movably arranged at the bottom of the display 1, and has a hollow structure inside; a chuck 52, which is embedded and installed in the middle position of the side wall of one end of the box 51; a bracket 53, which is installed on the end face of the chuck 52 away from the box 51 through a connecting shaft; a pin disc 54, which is rotatably installed in the middle position of the bracket 53, and passes through the chuck 52 and the outer wall of one side of the box 51, and has a cross-shaped cross-section; a lamp tube 55, which is threadedly installed on the axis of the end of the pin disc 54 away from the bracket 53; a branch rack 56, which is coaxially clamped and installed on the outer wall of one end of the pin disc 54 close to the middle position of the box 51, and the branch rack 56 is inside the box 51; a pawl 57, which is rotatably installed on the end of the bracket 53 away from the chuck 52 through a torsion spring; a ratchet 58, which is coaxially fixedly installed on the outer wall of the end of the pin disc 54 away from the box 51, and cooperates with the pawl 57; a screw cap 59, which is clamped and installed on the end of the pin disc 54 away from the box 51; Reference Fig.11 and Fig.12 It can be seen that the other end of the bracket 53 away from the end surface of one side of the chuck 52 is symmetrically installed with an end plate 531, and a spring rod 532 is slidably mounted between the two end plates 531, and a semi-closed ring 533 is mounted on one end of the spring rod 532 close to the axis of the pin disc 54; Reference Fig.12 , Fig.13 , Fig.14 and Fig.15 It can be seen that a shaft block 561 is fixedly installed at one end of the branching frame 56 away from the chuck 52, and the cross-sectional shape of the shaft block 561 is T-shaped. A telescopic pad 562 is clamped and installed at the axial center position of the end face of the shaft block 561 close to the chuck 52. Three columns 563 are evenly distributed at one end of the branching frame 56 away from the chuck 52. A sub-rotating plate 564 that is rotatably installed with the side wall of the box 51 is plugged and installed at one end of the column 563 away from the chuck 52. A fixing plate is slidably installed in the middle position of the outer walls of the three columns 563. The fixing plate consists of two The sub-rotating plate 564 is composed of a central circular segment and an outer circular segment, and the circular segment and the circular segment are rotatably mounted together. A latch 566 is slidably mounted at the central position of the sub-rotating plate 564 and is mounted together with the circular segment of the setting plate. A slot 567 is provided on the end surface of the sub-rotating plate 564 close to the setting plate and matched with the latch 566. A reset spring 568 is sleeved on the outer wall of the column 563 and is fixedly connected to the setting plate and the sub-rotating plate 564. The outer wall of the sub-tube frame 56 is evenly distributed with filters 569 along its circumference, and there are three of them. Reference Figure 1 and Fig.10 It can be seen that a movable seat 511 is symmetrically installed in a sliding and snap-fitting manner at one end of the box 51 away from the display 1, a connecting rod 512 is rotatably installed between the two movable seats 511, a dimming plate 513 is fixedly installed on the outer wall of the connecting rod 512, and side gears 514 are fixedly installed on the outer walls of both ends of the connecting rod 512. A side gear rack 515 that cooperates with the side gear 514 is symmetrically installed at the end of the box 51 away from the display 1, and a telescopic bottom plate 516 is slidably installed at the bottom end of the box 51 away from the display 1 through a spring.

[0040] The process of adjusting the light filling of the local highlight or dark area of ​​the display 1 by the adjustment module 5: First, the box 51 is guided and supported inside the receiving box 28, and reciprocates inside the receiving box 28 (moves to the bright or dark area). In specific implementation, the box 51 can be driven to move by an electric slider; Next, the user manually rotates the screw cap 59, and the pin plate 54, under the control of the screw cap 59, synchronously drives the branch frame 56 to rotate under the joint guidance of the chuck 52 and the box 51. At the same time, the positions of the filters 569 (filtering principle: mainly based on the interference, absorption and selective reflection of light to change the propagation path and wavelength of light) with different filtering properties represented by different positions change (that is, the filtering properties of the filters 569 irradiating the screen of the display 1 in the forward direction are not equal), thereby changing the intensity and range of the light irradiating the display 1 in the same light source environment, thereby realizing the range diversity and flexibility of the fill light function; A brief description of the application of filters in different scenarios (taking low light as an example): It is hereby explained that the filtering properties of the three filters increase or decrease in a step-by-step manner); Adjust the position of the filter from low to high or from high to low until the intensity of light irradiated to the display through the filter reaches the optimal state (i.e., no glare and no specular reflection); In addition, the filter achieves the purpose of eye protection by changing the propagation path of the light emitted by the display (changing the traditional optical path to an asymmetric optical path); In this process, the one-way matching of the ratchet 58 and the pawl 57 promotes the singleness and stability of the rotation of the screw cap 59. At the same time, the guiding support of the end plate 531 on the spring rod 532 and the elasticity of the spring rod 532 ensure the interaction force between the semi-closed ring 533 and the pin plate 54, further increasing the movement stability between the ratchet 58 and the pawl 57. Finally, through the linkage between the edge and the gear and the edge and rack 515 (in specific implementation, the movable seat 511 can be driven to move by the electric slider), the connecting rod 512 drives the dimming plate 513 to adjust at different angles, so as to cooperate with the filter 569 to further adjust the bright or dark areas of the display 1 under complex environments (the distance and angle between the dimming plate and the light source will affect the intensity of the light source irradiating the display), fully reduce the mirror emission phenomenon of the display 1, reduce the secondary emission of harmful light, and improve the color contrast and clarity of the display 1; Replacement and installation process of lamp 55 or filter 569: Lamp tube 55: First, place one end of the lamp tube 55 into the pin plate 54 near one end of the telescopic pad 562, and rotate it (the lamp tube 55 and the pin plate 54 can be threadedly connected for installation). Then, manually push the telescopic pad 562 to shrink, and finally slowly release the telescopic pad 562 until the telescopic pad 562 non-rigidly clamps the other end of the lamp tube 55. Disassemble the lamp tube 55: First press the telescopic pad 562, then rotate the lamp tube 55, and finally take it out. Filter 569: First, insert the filter 569 (5 / 18th of a circle) into the branch tube frame 56 near the end of the chuck 52; Next, the latch 566 is manually pressed to move toward the pillow block 561; Finally, the latch 566 is rotated until the latch 566 is engaged with the slot 567; Disassembling the filter 569 is the opposite of the above steps; When the latch 566 is rotated in the reverse direction and returned to its initial position, the fixing plate, under the restoring force of the reset spring 568, pushes the latch 566 in the reverse direction under the guiding support of the sub-turntable 564, and moves away from the fixing plate until it returns to its initial position.

[0041] The working principle of a multimedia interactive teaching machine provided by the present invention is as follows: Step 1: First, the tooling board 33 synchronously drives the angle shovel 332 and the anti-static sponge 334 to scrape and wipe the dust deposited on the screen of the display 1. At the same time, the dust flowing in the air is recovered into the dust collecting pipe 35 through the adsorption effect of the board dust cabin 36, which helps to improve the air quality in the classroom; Step 2: Then, the pin plate 54 is controlled by the screw cap 59 to drive the branch frame 56 to adjust the position of the filter 569. At the same time, through the linkage between the side rack 515 and the side gear 514, the connecting rod 512 drives the dimming plate 513 to make a corresponding angle change, so as to cooperate with the filter 569 to implement fill light for the highlight or dark area of ​​the display 1; Step 3: Finally, through the clamping connection between the joint strip 46 and the iron plate 47, as well as the traction of the tooling plate 33 and the guidance of the guide roller 42, the roller blind 45 is prompted to fully cover the display 1.

[0042] The circuits and controls involved in the present invention are all prior art and will not be described in detail here.

[0043] The above are only embodiments of the present invention, and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A multimedia interactive teaching machine, comprising a display (1), characterized in that: The bottom end of the display (1) is symmetrically provided with a replacement module (2), one side end of the display (1) is provided with a cleaning module (3), the other side end of the display (1) is provided with a dust prevention module (4), and an adjustment module (5) is provided between the replacement modules (2); The adjustment module (5) comprises: A box (51) is black and is movably arranged at the bottom of the display (1) and has a hollow structure inside; A chuck (52) is embedded in the middle of a side wall at one end of the cartridge box (51); A bracket (53) is installed on an end surface of the chuck (52) away from the cartridge box (51) via a connecting shaft; The pin disc (54) is rotatably mounted in the middle of the bracket (53), penetrates the outer wall of the chuck (52) and the box (51) at one side, and has a cross-shaped cross section; A lamp tube (55) is threadedly mounted on the axis of one end of the pin plate (54) away from the bracket (53); A branch pipe frame (56) is coaxially mounted on an outer wall of one end of the pin plate (54) near the middle of the box (51), and the branch pipe frame (56) is located inside the box (51); A ratchet pawl (57) is rotatably mounted on an end of the bracket (53) away from the end surface of the chuck (52) via a torsion spring; A ratchet wheel (58) is coaxially fixedly mounted on the outer wall of the pin plate (54) at one end away from the box (51), and cooperates with the pawl (57); The screw cap (59) is mounted on the pin plate (54) at one end away from the cassette (51).

2. A multimedia interactive teaching machine according to claim 1, characterized in that: An end plate (531) is symmetrically mounted on the other end of the bracket (53) away from the end surface of one side of the chuck (52), a spring rod (532) is slidably mounted between the two end plates (531), and a semi-closed ring (533) is mounted on one end of the spring rod (532) close to the axis of the pin disc (54).

3. A multimedia interactive teaching machine according to claim 1, characterized in that: The branch pipe frame (56) is fixedly installed with a pillow block (561) at one end away from the chuck (52), and the cross-sectional shape of the pillow block (561) is T-shaped. A telescopic pad (562) is clamped and installed at the axial center position of the end face of the pillow block (561) close to the chuck (52). The branch pipe frame (56) is evenly distributed with three columns (563) at one end away from the chuck (52). A sub-rotating disk (564) is installed and rotatably matched with the side wall of the box (51) at one end of the columns (563) away from the chuck (52). A fixing disk is slidably installed in the middle position of the outer walls of the three columns (563). The makeup plate is composed of two parts, namely, an axial circular segment and an outer circular ring segment, and the circular segment and the circular ring segment are rotatably mounted. The sub-rotating plate (564) is slidably mounted with a latch (566) mounted with the same latch as the circular segment of the makeup plate. The end surface of the sub-rotating plate (564) close to the makeup plate is provided with a slot (567) matching the latch (566). The outer wall of the column (563) is provided with a reset spring (568) fixedly connected to the makeup plate and the sub-rotating plate (564). The outer wall of the sub-tube frame (56) is evenly distributed with filters (569) along its circumference, and the number is three.

4. A multimedia interactive teaching machine according to claim 3, characterized in that: A movable seat (511) is symmetrically mounted on one end of the box (51) away from the display (1) in a sliding and engaging manner, a connecting rod (512) is rotatably mounted between the two movable seats (511), a dimming plate (513) is fixedly mounted on the outer wall of the connecting rod (512), and side gears (514) are fixedly mounted on the outer walls of both ends of the connecting rod (512), side gears (515) that match the side gears (514) are symmetrically mounted on one end of the box (51) away from the display (1), and a telescopic bottom plate (516) is slidably mounted on the bottom end of the box (51) away from the display (1) via a spring.

5. A multimedia interactive teaching machine according to claim 4, characterized in that: The replacement module (2) comprises: The side rails (21) have an L-shaped cross section and are symmetrically snap-fitted to the two sides of the bottom of the display (1); The corner bracket (22) is detachably mounted on the back of the bottom end of the display (1) by means of bolts, and is mounted by snap-fitting with the side rails (21) on the same side; A connecting plate (23) is slidably mounted at a middle position of the horizontal section of the side rail (21); A bottom engaging rack (24) is mounted on an end surface of the connecting plate (23) close to the display (1); An outer rotating rod (25) is rotatably mounted at a middle position of a vertical section of the side rail (21); A main gear (26) is fixedly mounted on the outer wall of one end of the outer rotating rod (25) close to the bottom rack (24); The top gear rack (27) is arranged directly above the bottom gear rack (24) and cooperates with the main gear (26); The receiving box (28) is one in number and is mounted between the two connecting plates (23) by snap-fitting. In addition, the cassette box (51) is mounted by sliding snap-fitting with the receiving box (28) via a rotating shaft.

6. A multimedia interactive teaching machine according to claim 5, characterized in that: The cleaning module (3) comprises: The bottom edge strip (31) is snap-fitted and mounted on the bottom of the display (1), and is snap-fitted and mounted with the top rack (27); A top strip (32) is mounted on the top of the display (1) by means of a reinforcing rib snap fit and is engaged with the bottom strip (31); The tooling plate (33) is slidably mounted on the middle position of the end surface of the top strip (32) close to the bottom strip (31), and is slidably mounted with the bottom strip (31); A partition plate (34) is mounted in a snap-fit ​​manner at a middle position of an end surface of the tooling plate (33) away from the display (1); A dust collecting pipe (35) is mounted on a central position of an end surface of one side of the partition plate (34); The plate dust chamber (36) has a right-angle trapezoidal cross-section and is mounted on the end surface of the tooling plate (33) close to the display (1) and is connected to the dust collecting pipe (35); The mouth strip (37) is mounted in a snap-fit ​​manner at a middle position of an end surface of the tooling plate (33) close to the display (1).

7. A multimedia interactive teaching machine according to claim 6, characterized in that: The end of the opening strip (37) close to the display (1) is evenly distributed in an array with retractable short shafts (331) installed in a sliding snap-fit ​​manner therewith. The end of the retractable short shaft (331) close to the display (1) is snap-fitted with an angle shovel (332), and the number is one. The end face of the tooling plate (33) close to the display (1) is snap-fitted with a page plate (333), and the page plate (333) is symmetrically distributed with the plate dust chamber (36). With the center line of the tooling plate (33) as a reference, the end of the page plate (333) close to the display (1) is snap-fitted with an anti-static sponge (334).

8. A multimedia interactive teaching machine according to claim 6, characterized in that: The dust prevention module (4) comprises: Two external ear seats (41) are symmetrically mounted on the side wall of one end of the display (1); A guide roller (42) rotatably mounted between the two external ear seats (41); Two inner ear seats (43) are symmetrically mounted on a side wall of one end of the display (1) and are on the same side as the outer ear seat (41); A winding roller (44) is installed between the inner ear seats (43) through the rotation of a spring; A rolling curtain (45) is sleeved on the outer wall of the winding roller (44); A joint strip (46) is mounted on the outer wall of the interface end of the roller blind (45) and is made of a magnet; The iron plate (47) is mounted in a clamping connection at a middle position of an end surface of the partition plate (34) on a side away from the dust collecting pipe (35).

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