Modular history teaching aid

Abstract

The application relates to the technical field of teaching aids, and discloses a modular history teaching auxiliary teaching aid which comprises an outer shell body, a demonstration assembly is arranged in the outer shell body, the demonstration assembly comprises an inner lining shell body, a circulating belt and two driving rollers, and writing can be realized on the circulating belt through a magnetic force pen; a plurality of demonstration boards are further arranged; an eliminating assembly is arranged in the outer shell body and is used for eliminating writing traces on the circulating belt. Through the arrangement of the demonstration assembly, the circulating belt can realize global magnetic attraction writing, the pre-prepared demonstration boards can be adsorbed, the visualization circulation display of historical dynasties, events and maps can be realized, the writing time of blackboard writing is reduced, the display requirements of continuous and modular history teaching are met, compared with traditional chalk writing, the magnetic attraction writing mode saves consumables, avoids the influence of dust on users, and makes the teaching process more environmentally friendly and healthy.

Description

Technical Field

[0001] This invention relates to the field of teaching aids technology, specifically to a modular history teaching aid. Background Technology

[0002] The blackboard is a commonly used traditional teaching tool in teaching settings. It is mainly used by teachers to write on the board, draw teaching diagrams, and organize knowledge points. It can intuitively display teaching content and facilitate students to intuitively accept knowledge. It is a basic tool for carrying out knowledge explanation and realizing teacher-student interaction in classroom teaching, and is widely used in daily classroom teaching in various subjects.

[0003] Chinese patent CN219206583U discloses a "blackboard for teaching," comprising a housing, with a projection area and a display area on the front side of the housing. A storage box is located at the top of the housing corresponding to the projection area, and a rotating shaft is mounted inside the storage box, with a screen wound around it. A sheet of iron is located on the front side of the display area, with multiple magnets adsorbed on its surface. A writing board slides inside the housing, and a bottom-sealed rotating tube is also rotatably mounted on the housing. The rotating tube is driven by a drive motor mounted on the housing via a gear structure. Wiping cotton is provided on the rotating tube, and corresponding through holes are evenly distributed on both the rotating tube and the wiping cotton. A vacuum cleaner is also mounted on the housing, with its air inlet connected to one end of a connecting pipe, the other end of which is rotatably connected to the top of the rotating tube via a rotary joint. A servo motor, a drive motor, and the vacuum cleaner are all electrically connected to a controller located on the side of the housing. This patent has the advantages of simple structural design, rich functionality, and strong practicality compared to existing technologies.

[0004] However, the existing technology has the following problems:

[0005] Most existing blackboards still rely on handwritten notes for teaching. When teaching content that involves a lot of text, such as history, teachers need to write the title and content on the blackboard in class. After finishing one section, they need to manually erase it before writing the next section. Writing on the blackboard takes up a lot of teaching time, making it difficult to improve teaching efficiency. Furthermore, writing on the blackboard requires consumables, and when using chalk, the dust produced can easily affect the respiratory health of teachers. Summary of the Invention

[0006] The purpose of this invention is to provide a modular teaching aid for history in order to solve the above-mentioned problems. It aims to overcome the shortcomings of existing technologies, such as the fact that writing on the blackboard takes up a lot of teaching time and makes it difficult to improve teaching efficiency. Details are described below.

[0007] To achieve the above objectives, the present invention provides the following technical solution:

[0008] This invention provides a modular history teaching aid, comprising an outer shell containing a demonstration component. The demonstration component includes an inner shell, a circulating belt, and two drive rollers. The circulating belt can be written on using a magnetic pen. The inner shell and the two drive rollers support the inner side of the circulating belt, and both the inner shell and the drive rollers are made of magnetically conductive material. It also includes multiple demonstration boards, each with a flexible magnetic sheet on its back, allowing it to be attached to the circulating belt. An erasure component is located within the outer shell to remove writing marks from the circulating belt.

[0009] Preferably, both drive rollers are rotatably mounted inside the housing, the inner liner is mounted inside the housing, the circulation belt is sleeved on the outside of the inner liner and the two drive rollers, and a crank is connected to one of the drive rollers.

[0010] Preferably, the circulation belt has multiple microcapsules arranged in an array, and each microcapsule contains a batch of magnetic beads and white silicone oil.

[0011] Preferably, each of the two drive rollers is fitted with a pulley, and a transmission belt is fitted between the two pulleys.

[0012] Preferably, the elimination component includes a magnetic rod, and the inner liner shell has a notch. The magnetic rod is movably connected in the notch of the inner liner shell, and the magnetic rod is arranged laterally and contacts the inner side of the circulation belt.

[0013] Preferably, the elimination assembly further includes a connecting rod and a rotating shaft. The connecting rod is connected to the magnetic rod, and the rotating shaft is rotatably installed inside the inner liner housing. Gears are connected to both ends of the rotating shaft, and a slanted wheel is connected to the outer wall of the rotating shaft. Two toothed rings are sleeved on the outer wall of the drive roller near the rotating shaft, and the two toothed rings mesh with the two gears respectively. A fork is connected to one end of the connecting rod near the slanted wheel. The fork has a groove, and when the slanted wheel rotates, it contacts the edge of the groove of the fork and drives the fork to move back and forth.

[0014] Preferably, the magnetic rod is connected to a plurality of vibrating rods, and a plurality of serrated strips are installed on the inner side of the inner liner shell, with the plurality of vibrating rods respectively contacting the plurality of serrated strips.

[0015] Preferably, the housing is provided with a support assembly, which includes a set of rotating rollers and a flexible belt. The set of rotating rollers is rotatably installed in the housing, and the flexible belt is sleeved on the set of rotating rollers. When the demonstration board moves to the magnetic rod, it contacts the flexible belt.

[0016] Preferably, the bottom of the outer casing is provided with a disassembly assembly, which includes a scraper and a slide. The scraper is hinged to the outer casing, and the slide is horizontally slidably connected to the outer casing. An abutment rod and a handle are connected to the slide. The abutment rod contacts the bottom surface of the scraper, and the handle is located outside the outer casing. When the abutment rod moves toward the scraper, it can cause the scraper to tilt up. After tilting up, the scraper contacts the bottom area of ​​the circulation belt. A collection box is inserted into the bottom of the outer casing, and the collection box is located below the scraper.

[0017] Preferably, the inner liner shell has two storage racks for storing the demonstration board slidably connected to its inner side. The outer shell has openings on both sides, and the two storage racks can be pulled out from the two openings respectively. The outer shell is equipped with a tray, and the bottom of the outer shell is equipped with a movable frame.

[0018] The beneficial effects are:

[0019] 1. This modular history teaching aid, through the setting of demonstration components, enables the circular tape to achieve full-area magnetic writing. Combined with the prefabricated, absorbent demonstration board, it realizes the visual and cyclical display of historical dynasties, events, and maps, reducing blackboard writing time and allowing more teaching time to be used for explanation, thereby improving teaching quality and efficiency. In addition, the teaching content displayed on the demonstration board is more vivid and illustrative, and the demonstration board can be reused multiple times, adapting to the continuous and modular display needs of history teaching. Compared with traditional chalk writing, the magnetic writing method saves consumables and avoids the impact of dust on users, making the teaching process more environmentally friendly and healthy.

[0020] 2. This modular history teaching aid, through the setting of the elimination component, allows the writing marks on the circulating belt to be automatically eliminated by the magnetic stick as the belt moves, eliminating the need for manual erasing, further saving classroom time, improving the utilization rate of teaching time, and is environmentally friendly and clean with no consumables or dust throughout the process.

[0021] 3. This modular history teaching aid, through its detachable components, allows the completed demonstration board to be automatically scraped off and collected in a collection box without manual removal, making it simple and quick to operate. Combined with a pull-out storage rack, it enables rapid replacement and modular storage of demonstration boards, making it suitable for multi-lesson and multi-theme history teaching, significantly improving its flexibility and practicality. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0024] Figure 2 This is a schematic diagram of the demonstration component structure of the present invention;

[0025] Figure 3 This is a schematic diagram of the transmission belt structure of the present invention;

[0026] Figure 4 This is a schematic diagram of the microcapsule structure of the present invention;

[0027] Figure 5 This is a schematic diagram of the elimination component structure of the present invention;

[0028] Figure 6 This is a schematic diagram of the inclined wheel structure of the present invention;

[0029] Figure 7 This is a schematic diagram of the vibration rod structure of the present invention;

[0030] Figure 8 This is a schematic diagram of the support component structure of the present invention;

[0031] Figure 9 This is a schematic diagram of the disassembly component structure of the present invention;

[0032] Figure 10 This is a schematic diagram of the storage rack structure of the present invention.

[0033] The annotations in the attached figures are explained as follows:

[0034] 1. Outer shell;

[0035] 2. Demonstration components; 21. Drive roller; 22. Inner liner shell; 23. Circulating belt; 231. Microcapsule; 24. Crank handle; 25. Pulley; 26. Transmission belt; 3. Demonstration board;

[0036] 4. Elimination component; 41. Magnetic rod; 42. Connecting rod; 43. Fork head; 44. Shaft; 45. Gear; 46. Slanted wheel; 47. Gear ring; 48. Vibrating rod; 49. Sawtooth strip;

[0037] 5. Support components; 51. Rotary rollers; 52. Flexible belt;

[0038] 6. Disassembly components; 61. Scraper; 62. Carriage; 63. Abutment rod; 64. Handle; 65. Collection box;

[0039] 7. Storage rack; 8. Tray; 9. Mobile rack. Detailed Implementation

[0040] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be described in detail below. Obviously, the described embodiments are merely some embodiments of this invention, and not all embodiments. Based on the embodiments of this invention, all other implementation methods obtained by those skilled in the art without creative effort are within the scope of protection of this invention.

[0041] In the following description, certain specific details are set forth for the purpose of illustrating various disclosed embodiments in order to provide a thorough understanding of the various disclosed embodiments. However, those skilled in the art will recognize that embodiments may be practiced without one or more of these specific details. In other instances, well-known apparatuses, structures, and techniques associated with this application may not have been shown or described in detail to avoid unnecessarily obscuring the description of the embodiments.

[0042] Throughout this specification, references to "one embodiment" or "an embodiment" indicate that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment. Therefore, the appearance of "in one embodiment" or "in another embodiment" in various places throughout the specification does not necessarily refer to the same embodiment. Furthermore, a particular feature, structure, or characteristic may be combined in any manner in one or more embodiments.

[0043] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0044] In the description of this application, "multiple" means two or more, unless otherwise expressly and specifically defined.

[0045] Please see Figure 1 - Figure 4 In one embodiment:

[0046] A modular history teaching aid includes an outer shell 1, within which a demonstration component 2 is housed. The demonstration component 2 includes an inner liner shell 22, a circulating belt 23, and two drive rollers 21. Both drive rollers 21 are rotatably mounted inside the outer shell 1. The inner liner shell 22 is installed inside the outer shell 1. The circulating belt 23 is fitted over the inner liner shell 22 and the two drive rollers 21. A crank handle 24 is connected to one of the drive rollers 21. Multiple microcapsules 231 are arrayed on the circulating belt 23, each containing a batch of magnetic beads and white silicone oil. The circulating belt 23 can be written on using a magnetic pen. When the drive rollers 21 rotate, they drive the circulating belt 23 to perform a circular cyclic motion along the outer periphery of the inner liner shell 22 and the drive rollers 21, enabling the circulating belt 23 to move similarly to a conveyor belt. The crank handle 24 is a manually operated mechanism. The user can rotate the corresponding drive roller 21 by turning the crank handle 24, so as to achieve uniform circulation of the circulation belt 23. The magnetic beads in the microcapsule 231 can move freely under the lubrication of white silicone oil. Under normal conditions, the magnetic beads are located at the end of the microcapsule 231 near the inner side of the circulation belt 23. At this time, the white silicone oil fills the other end of the microcapsule 231, so that the outer side of the circulation belt 23 appears white. When the magnetic pen writes on the circulation belt 23, the magnetic beads move to the end of the microcapsule 231 near the magnetic pen under the action of magnetic force. At this time, the microcapsules 231 on the writing mark of the circulation belt 23 appear black, thus achieving the effect of making the writing mark on the surface of the circulation belt 23. The array of microcapsules 231 can realize writing in the entire area of ​​the circulation belt 23, which can meet the needs of annotation and writing at any position in history teaching.

[0047] Furthermore, the inner liner 22 and two drive rollers 21 support the inner side of the circulating belt 23. Both the inner liner 22 and the drive rollers 21 are made of magnetically conductive material. Multiple demonstration boards 3 are also included, each with a flexible magnetic sheet on its back. The demonstration boards 3 can be magnetically attached to the circulating belt 23. The inner liner 22 and the drive rollers 21 form a support structure that conforms to the entire inner side of the circulating belt 23, preventing collapse or wrinkling of the circulating belt 23 during movement and writing, ensuring smooth and even operation. The inner liner 22 and drive rollers 21 are made of magnetically conductive material and can be attracted by magnets. When the flexible magnetic sheet on the back of the demonstration board 3 is attached to the circulating belt 23, the magnetic force of the flexible magnetic sheet passes through the circulating belt 23 and attracts the inner liner 22, thus achieving magnetic attachment of the demonstration board 3 to the surface of the circulating belt 23. The technical effect of the surface is that, when the circulating belt 23 moves, the static friction generated by the magnetic attraction between the circulating belt 23 and the demonstration board 3 can drive the demonstration board 3 to move synchronously with the circulating belt 23. Furthermore, the demonstration board 3 and the flexible magnetic sheet can adapt to the bending deformation of the circulating belt 23, thus maintaining a tight fit at all times. This ensures that the demonstration board 3 can stably complete the circular motion with the circulating belt 23 throughout the entire process. The demonstration board 3 is pre-made, and according to the lesson preparation content, teaching titles, dynasty maps, major events, and other teaching content that needs to be vividly displayed can be set on different demonstration boards 3 in advance. Therefore, when using it, users can vividly display dynasty maps, major events, and other teaching content in history teaching through the demonstration board 3, making the teaching process more vivid, reducing the time spent writing on the blackboard, and improving the utilization rate of teaching time.

[0048] In this embodiment, the teaching content is set on the demonstration board 3 by printing and pasting.

[0049] In addition, pulleys 25 are respectively sleeved on the two drive rollers 21, and a transmission belt 26 is sleeved between the two pulleys 25. The pulleys 25 are coaxially fixed with the drive rollers 21, and the transmission belt 26 links the two pulleys 25 to achieve synchronous and co-rotation of the two drive rollers 21. This avoids the problem of slippage and deviation of the circulating belt 23 when a single drive roller 21 is driven, ensures that the force on both sides of the circulating belt 23 is uniform, the circular circulation is more stable, and improves the synchronicity and stability of the running of the circulating belt 23.

[0050] Please see Figure 2 , Figure 5 - Figure 7 In another embodiment:

[0051] The outer casing 1 contains an erasure component 4 for erasing writing marks on the circulation belt 23. The erasure component 4 includes a magnetic rod 41. A notch is provided on the inner liner 22, and the magnetic rod 41 is movably connected to the notch of the inner liner 22. The magnetic rod 41 is arranged laterally and contacts the inner side of the circulation belt 23. The front of the outer casing 1 has an opening for displaying the front side of the circulation belt 23. Therefore, the front side of the circulation belt 23 is the display surface, and the rear side is the spare surface. The notch and the magnetic rod 41 are located on the rear spare surface of the circulation belt 23. When the circulation belt 23 circulates, the written marks on the board move downwards, and finally... When the circulation reaches the magnetic rod 41, and the magnetic rod 41 contacts the inner side of the circulation belt 23, the magnetic rod 41 can attract the magnetic beads inside the microcapsule 231, causing the magnetic beads to move from the outside to the inside, squeezing the white silicone oil to the outside. At this time, the outer side of the circulation belt 23 will show white again, thereby eliminating the writing marks on the surface of the circulation belt 23. This means that the user does not need to erase the blackboard writing that has already been written during the teaching process. When the circulation belt 23 is driven to circulate by the crank 24, the writing on the blackboard can be automatically erased when it passes the position of the magnetic rod 41, saving the user's time to erase the blackboard writing and further improving the utilization rate of teaching time.

[0052] In addition, the elimination component 4 also includes a connecting rod 42 and a rotating shaft 44. The connecting rod 42 is connected to the magnetic rod 41, and the rotating shaft 44 is rotatably installed inside the inner liner housing 22. Gears 45 are connected to both ends of the rotating shaft 44, and a slanted wheel 46 is connected to the outer wall of the rotating shaft 44. Two toothed rings 47 are sleeved on the outer wall of the drive roller 21 near the rotating shaft 44, and the two toothed rings 47 mesh with the two gears 45 respectively. A fork 43 is connected to one end of the connecting rod 42 near the slanted wheel 46. The fork 43 has a groove. When the slanted wheel 46 rotates, it contacts the edge of the groove of the fork 43 and drives the fork 43 to move back and forth. When the drive roller 21 rotates, it drives the toothed rings 47. Synchronous rotation, with gear ring 47 meshing with gear 45, drives shaft 44 and slant wheel 46 to rotate. Slant wheel 46 is an inclined disc. When it rotates, its edge continuously and repeatedly abuts against the edge of the groove of fork head 43, thereby moving fork head 43 back and forth. Fork head 43 drives magnetic rod 41 to move laterally and reciprocally through connecting rod 42. During the movement of circulation belt 23, magnetic rod 41 contacts the inner side of circulation belt 23 through lateral reciprocating movement. By reciprocating movement, the contact area with microcapsules 231 per unit time is increased, thereby promoting the adsorption effect of its own magnetic force on magnetic beads and making the blackboard writing removal more thorough.

[0053] It is worth noting that multiple vibrating rods 48 are connected to the magnetic rod 41, and multiple serrated strips 49 are installed inside the inner liner shell 22. The multiple vibrating rods 48 contact the multiple serrated strips 49 respectively. When the magnetic rod 41 moves laterally back and forth, it drives the vibrating rods 48 to move synchronously. The ends of the vibrating rods 48 continuously contact and collide with the tooth surfaces of the serrated strips 49, generating micro-vibrations. These micro-vibrations are transmitted to the circulation belt 23 and the microcapsule 231 through the magnetic rod 41. The microcapsule 231 can effectively prevent the magnetic beads inside from getting stuck through vibration, promote the magnetic beads to be attracted by the magnetic rod 41, and avoid the problem of incomplete writing and blurred writing caused by the magnetic beads getting stuck after long-term use.

[0054] Please see Figure 2 , Figure 8 In another embodiment:

[0055] It is worth noting that the outer casing 1 is equipped with a support assembly 5, which includes a set of rotating rollers 51 and a flexible belt 52. The set of rotating rollers 51 is rotatably installed inside the outer casing 1, and the flexible belt 52 is sleeved on the set of rotating rollers 51. When the demonstration board 3 moves to the magnetic rod 41, it comes into contact with the flexible belt 52. The rotating rollers 51 provide rotational support for the flexible belt 52. When the demonstration board 3 moves and comes into contact with the flexible belt 52, the outer side of the flexible belt 52 is made of flexible material, and its outer side comes into contact with the surface of the demonstration board 3 to form friction, thereby causing the demonstration board to... 3 drives the flexible belt 52 to circulate. During the contact process with the demonstration board 3, the flexible belt 52 supports the demonstration board 3, forming a tendency for the circulating belt 23 and the flexible belt 52 to temporarily clamp the demonstration board 3. Therefore, when the demonstration board 3 moves with the circulating belt 23 to the area of ​​the elimination component 4, the flexible belt 52 provides effective support for the demonstration board 3, preventing the demonstration board 3 from loosening due to the magnetic force of the magnetic rod 41 when the magnetic rod 41 moves back and forth, thereby ensuring the stability of the demonstration board 3 adsorbed on the circulating belt 23.

[0056] Please see Figure 2 , Figure 9 In another embodiment:

[0057] The bottom of the outer casing 1 is provided with a disassembly assembly 6, which includes a scraper 61 and a slide 62. The scraper 61 is hinged inside the outer casing 1, and the slide 62 is horizontally slidably connected to the outer casing 1. An abutment rod 63 and a handle 64 are connected to the slide 62. The abutment rod 63 contacts the bottom surface of the scraper 61, and the handle 64 is located outside the outer casing 1. When the abutment rod 63 moves towards the scraper 61, it can cause the scraper 61 to tilt up. After tilting up, the scraper 61 contacts the bottom area of ​​the circulation belt 23. A collection box 65 is inserted into the bottom of the outer casing 1, and the collection box 65 is located below the scraper 61. The user can pull or push the slide 62 by using the handle 64, so that the slide 62 moves the abutment rod 63 closer to or away from the scraper 61. When it is necessary to remove the demonstration board 3 on the circulation belt 23, push the handle 64, and the abutment rod 63 moves closer to the scraper 61. When the contact rod 63 moves in the direction of 1, it applies a force to the bottom of the scraper 61, causing the scraper 61 to be lifted and tilted up. After tilting up, the edge of the scraper 61 is in close contact with the bottom of the circulation belt 23. When the circulation belt 23 moves, the scraper 61 can scrape off the demonstration board 3 that passes by the scraper 61 on the circulation belt 23. The scraped demonstration board 3 falls into the collection box 65 below under the action of gravity, realizing the quick disassembly and centralized storage of the demonstration board 3 without manual prying, making the operation more convenient. When preparing lessons, if it is not necessary to scrape off the demonstration board 3, the handle 64 is pulled to move the contact rod 63 away from the scraper 61. The scraper 61 swings downward by gravity and gets away from the movement trajectory of the demonstration board 3. At this time, the demonstration board 3 will not fall off when the circulation belt 23 moves. The plug-in design of the collection box 65 makes it easy to take out the demonstration board 3 collected inside.

[0058] Please see Figure 1 , Figure 9 , Figure 10 In another embodiment:

[0059] Two storage racks 7 for storing demonstration boards 3 are slidably connected to the inner side of the inner shell 22. Openings are provided on both sides of the outer shell 1, and the two storage racks 7 can be pulled out from the two openings respectively. A tray 8 is installed on the outer shell 1, and a movable frame 9 is installed at the bottom of the outer shell 1. The storage racks 7 can slide along the inner side of the inner shell 22 and be pulled out through the openings on both sides of the outer shell 1, which is convenient for storing spare demonstration boards 3. The capacity of the two storage racks 7 can meet the spare quantity of demonstration boards 3 for several days, realizing the classified and modular storage of demonstration boards 3. It is convenient for storing and retrieving demonstration boards 3 of different themes and dynasties in history teaching. The tray 8 can hold teaching manuals, auxiliary tools, magnetic pens and other items, which are convenient to take out during teaching. The movable frame 9 provides movable support for the outer shell 1, which is convenient for the flexible handling and relocation of the outer shell 1 in the teaching scene, improving the convenience and versatility of use.

[0060] When using this modular history teaching aid, during the lesson preparation stage, the user attaches the demonstration board 3 to the front display surface of the circulation belt 23 using a flexible magnetic sheet. Turning the crank handle 24 drives the corresponding drive roller 21 to rotate. Under the synchronous transmission of the pulley 25 and the transmission belt 26, the two drive rollers 21 rotate in the same direction and at the same speed. The circulation belt 23 is driven to make a stable circular circulation along the inner shell 22 and the outer side of the drive roller 21, so that the demonstration board 3 to be used later moves downward with the circulation belt 23 and goes around to the rear side to be stored inside the outer shell 1. Then, the demonstration board 3 to be explained first is attached to the front side of the circulation belt 23 to complete the lesson preparation layout.

[0061] During the formal lecture, after the demonstration board 3 on the front side of the outer shell 1 has finished explaining, continue to crank the handle 24 to make the demonstration board 3 stored on the back of the circulation belt 23 circulate to the front display area for the next part of the lecture. At the same time, the user writes on the surface of the circulation belt 23 with a magnetic pen according to the lecture content. Under the action of magnetism, the microcapsules 231 distributed in the array inside the circulation belt 23 move over the resistance of white silicone oil and display black writing, realizing teaching annotation.

[0062] During the movement of the circulating belt 23, the drive roller 21 synchronously drives the toothed ring 47 to rotate. The toothed ring 47 meshes with the gear 45 to drive the rotating shaft 44 and the inclined wheel 46 to rotate. The inclined wheel 46 eccentrically abuts against the groove of the fork head 43. Through the connecting rod 42, it drives the magnetic rod 41 to move laterally back and forth in the recess of the inner liner shell 22. The vibrating rod 48 on the magnetic rod 41 continuously collides with the serrated strip 49 on the inner side of the inner liner shell 22 to generate micro-vibration, which promotes the smooth reset of the magnetic beads in the microcapsule 231. The magnetic rod 41 uses reverse magnetic force to attract the magnetic beads back to the inside, so that the writing on the surface of the circulating belt 23 is automatically eliminated. At the same time, the rotating roller 51 of the support component 5 drives the flexible belt 52 to operate passively, which works with the circulating belt 23 to flexibly clamp the demonstration board 3 and prevent it from loosening and falling off due to magnetic force.

[0063] To clean up the finished demonstration board 3, push the handle 64 on the outside of the outer shell 1 forward, which will move the slide 62 and the abutment rod 63. The abutment rod 63 will lift the hinged scraper 61 so that it will be raised and contact the bottom of the circulation belt 23. During the circulation, the demonstration board 3 will be scraped down into the collection box 65 below for centralized storage.

[0064] After all the preset demonstration boards 3 have been used up, the user can pull out the storage rack 7 inside the inner lining shell 22 from the openings on both sides of the outer shell 1, take out the spare demonstration board 3, shake the handle 24 to switch the blank circulation belt 23 to the front, manually attach the spare demonstration board 3 and continue the cycle of teaching. The tray 8 on the outer shell 1 can hold teaching tools, and the bottom movable rack 9 facilitates the overall movement of teaching aids and scene switching.

[0065] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A modular teaching aid for history, characterized in that, include: The outer shell (1) is provided with a demonstration component (2) inside the outer shell (1). The demonstration component (2) includes an inner liner shell (22), a circulation belt (23) and two drive rollers (21). The circulation belt (23) can be written on by a magnetic pen. The inner liner (22) and the two drive rollers (21) support the inner side of the circulation belt (23), and both the inner liner (22) and the drive rollers (21) are made of magnetic material; It also includes multiple demonstration boards (3), the back of which is provided with a flexible magnetic sheet, and the demonstration board (3) can be adsorbed onto the circulation belt (23) by the flexible magnetic sheet; The outer casing (1) is provided with an erasure component (4) for erasing writing marks on the loop tape (23); The elimination component (4) includes a magnetic rod (41), and a notch is provided on the inner liner shell (22). The magnetic rod (41) is movably connected in the notch of the inner liner shell (22). The magnetic rod (41) is arranged laterally and contacts the inner side of the circulation belt (23). The elimination assembly (4) also includes a connecting rod (42) and a rotating shaft (44). The connecting rod (42) is connected to the magnetic rod (41). The rotating shaft (44) is rotatably installed inside the inner liner housing (22). Gears (45) are connected to both ends of the rotating shaft (44). A slanted wheel (46) is connected to the outer wall of the rotating shaft (44). Two toothed rings (47) are sleeved on the outer wall of the drive roller (21) near the rotating shaft (44). The two toothed rings (47) mesh with the two gears (45) respectively. A fork (43) is connected to one end of the connecting rod (42) near the slanted wheel (46). The fork (43) has a groove. When the slanted wheel (46) rotates, it contacts the edge of the groove of the fork (43) and drives the fork (43) to move back and forth. Multiple vibrating rods (48) are connected to the magnetic rod (41), and multiple serrated strips (49) are installed on the inner side of the inner liner shell (22). The multiple vibrating rods (48) are in contact with the multiple serrated strips (49) respectively.

2. The modular history teaching aid according to claim 1, characterized in that: Both drive rollers (21) are rotatably mounted inside the outer shell (1), the inner liner shell (22) is mounted inside the outer shell (1), the circulating belt (23) is sleeved on the outside of the inner liner shell (22) and the two drive rollers (21), and a crank handle (24) is connected to one of the drive rollers (21).

3. The modular history teaching aid according to claim 2, characterized in that: Multiple microcapsules (231) are arrayed on the circulation belt (23), and each microcapsule (231) contains a batch of magnetic beads and white silicone oil.

4. The modular history teaching aid according to claim 3, characterized in that: Two drive rollers (21) are respectively fitted with pulleys (25), and a transmission belt (26) is fitted between the two pulleys (25).

5. The modular history teaching aid according to claim 1, characterized in that: The outer shell (1) is provided with a support assembly (5), which includes a set of rotating rollers (51) and a flexible belt (52). The set of rotating rollers (51) is rotatably installed inside the outer shell (1), and the flexible belt (52) is sleeved on the set of rotating rollers (51). When the demonstration board (3) moves to the magnetic rod (41), it contacts the flexible belt (52).

6. The modular history teaching aid according to claim 1, characterized in that: The bottom of the outer shell (1) is provided with a disassembly assembly (6), which includes a scraper (61) and a slide (62). The scraper (61) is hinged inside the outer shell (1), and the slide (62) is horizontally slidably connected to the outer shell (1). The slide (62) is connected with an abutment rod (63) and a handle (64). The abutment rod (63) contacts the bottom surface of the scraper (61), and the handle (64) is located outside the outer shell (1). When the abutment rod (63) moves toward the scraper (61), it can cause the scraper (61) to tilt up. After the scraper (61) tilts up, it contacts the bottom area of ​​the circulation belt (23). A collection box (65) is inserted into the bottom of the outer shell (1), and the collection box (65) is located below the scraper (61).

7. A modular history teaching aid according to claim 6, characterized in that: The inner liner shell (22) has two storage racks (7) for storing the demonstration board (3) slidably connected to its inner side. The outer shell (1) has openings on both sides. The two storage racks (7) can be pulled out from the two openings respectively. The outer shell (1) is equipped with a tray (8) and a movable frame (9) is installed at the bottom of the outer shell (1).

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