Magnetic writing film, teaching writing board, sliding teaching writing board, smart blackboard

Abstract

The application relates to a magnetic writing film, a teaching writing board, a push-pull type teaching writing board and a smart blackboard. The teaching writing board comprises a writing substrate and a magnetic writing film. The magnetic writing film comprises a bottom film, a magnetic microcapsule layer and a surface film. The bottom film is arranged on one side of the writing substrate. The magnetic microcapsule layer is attached to the side of the bottom film away from the writing substrate. The magnetic microcapsule layer comprises water-based glue and magnetic microcapsules dispersed in the water-based glue. The magnetic microcapsules comprise wall material and core material wrapped by the wall material. The core material comprises magnetic particles. The surface film comprises a transparent substrate layer and a transparent writing coating layer. The transparent substrate layer is arranged on the side of the magnetic microcapsule layer away from the bottom film. The transparent writing coating layer is arranged on the side of the transparent substrate layer away from the magnetic microcapsule layer. The transparent writing coating layer comprises resin and microparticles dispersed in the resin. The transparent writing coating layer is used for writing by a magnetic writing pen and a liquid writing pen. The color of handwriting and the diversity of writing methods are improved, and the presentation effect of board writing is improved.

Description

Technical Field

[0001] This application relates to the field of educational equipment technology, and in particular to magnetic writing films, teaching writing boards, push-pull teaching writing boards, and smart blackboards. Background Technology

[0002] Currently, although many classrooms are equipped with multimedia equipment, writing on the blackboard with chalk remains an irreplaceable method in educational activities. However, the daily use of blackboards and chalk in classrooms exposes numerous problems. The large amounts of dust generated during writing or erasing on the blackboard severely pollute the classroom environment, affecting the respiratory health of teachers and students, and harming the performance and lifespan of multimedia equipment and laboratory instruments. Furthermore, the extensive use of chalk leads to the exploitation of large amounts of mineral resources, resulting in environmental pollution and ecological damage.

[0003] Among related technologies, there are technical solutions that use magnetic writing pens to replace chalk and magnetic blackboards to replace traditional blackboards. By writing on magnetic blackboards with magnetic writing pens, the problem of chalk dust can be solved.

[0004] However, using a magnetic pen to write on a magnetic blackboard is too simplistic, resulting in poor presentation of the writing. Summary of the Invention

[0005] Therefore, it is necessary to provide a magnetic writing film, a teaching writing board, a push-pull teaching writing board, or a smart blackboard to address the problems caused by traditional teaching writing methods, such as dust pollution and high consumption of consumables.

[0006] One embodiment of this application provides a teaching writing board, the teaching writing board including a writing board body, the writing board body comprising:

[0007] Writing substrate; and

[0008] A magnetic writing film, comprising a base film, a magnetic microcapsule layer, and a surface film, wherein the base film is disposed on one side of the writing substrate, and the magnetic microcapsule layer is attached to the side of the base film facing away from the writing substrate, and the magnetic microcapsule layer comprises an aqueous adhesive and magnetic microcapsules dispersed in the aqueous adhesive.

[0009] The surface film includes a transparent substrate layer and a transparent writing coating. The transparent substrate layer is disposed on the side of the magnetic microcapsule layer opposite to the bottom film, and the transparent writing coating is disposed on the side of the transparent substrate layer opposite to the magnetic microcapsule layer. The transparent writing coating includes resin and microparticles dispersed in the resin.

[0010] The transparent writing coating is used for writing with magnetic writing pens and liquid writing pens.

[0011] The aforementioned teaching writing board, when used in a classroom, allows for writing on the transparent writing coating of the magnetic writing film using a magnetic pen. During writing, the magnetic pen attracts the magnetic particles within the magnetic microcapsules of the magnetic writing film. Because the surface film comprises a transparent substrate layer and a transparent writing coating, the writing marks formed by the migration of magnetic particles are visible through the film. Alternatively, a liquid writing pen can be used to write on the transparent writing coating of the magnetic writing film. Since the transparent writing coating includes resin and microparticles dispersed in the resin, the writing liquid adheres to the surface of the film, forming marks that are easily erased. Therefore, the teaching writing board of this embodiment is flexibly applicable to both magnetic and liquid writing, enhancing the diversity of handwriting colors and writing methods, and improving the presentation of the writing on the board.

[0012] In one embodiment, the teaching writing board further includes a handwriting recognition module, which is installed on the writing board body and used to recognize handwriting information written on the magnetic writing film.

[0013] The handwriting recognition module can identify handwriting information written on magnetic writing film, thereby recognizing the content written on the blackboard by teachers during teaching, and making it convenient to save the blackboard content based on the recognition results of the handwriting recognition module.

[0014] In one embodiment, the teaching writing board further includes a border structure, the border structure including four side borders, the four side borders being arranged one-to-one on the four sides of the writing board body; the handwriting recognition module includes an infrared emitting unit and an infrared receiving unit disposed on the side borders;

[0015] In each pair of opposing side frames, one side frame is provided with a plurality of infrared emitting units, and the other side frame is provided with a plurality of infrared receiving units corresponding one-to-one with the plurality of infrared emitting units.

[0016] Multiple infrared rays emitted along the width of the writing tablet intersect with multiple infrared rays emitted along its length, forming multiple intersection points, each corresponding to a different coordinate. When writing on the tablet with a magnetic stylus, the stylus blocks the transmission of infrared rays at a certain coordinate, preventing the infrared receivers in both directions at that coordinate from receiving complete infrared signals. Based on the infrared receivers that fail to receive complete signals, the position coordinates of the magnetic stylus can be determined. By sending these coordinates to a computer in real time, the computer can retrieve and save the written handwriting.

[0017] In one embodiment, the handwriting recognition module is a capacitive touch film covering the surface film.

[0018] When writing on the writing pad using a magnetic stylus, the writing is done on the capacitive touch film. When the magnetic stylus writes at a specific coordinate on the capacitive touch film, it changes the capacitance value at that coordinate. The computer can then determine the change in the magnetic stylus's movement path based on the real-time changes in the capacitance value at each coordinate on the capacitive touch film, thus obtaining and saving the written handwriting.

[0019] In one embodiment, the writing board body further includes an elastic buffer layer disposed between the writing substrate and the magnetic writing film.

[0020] When writing on the magnetic writing film, the elastic buffer layer provides cushioning, making the writing feel soft and smooth, and also provides impact resistance to protect the magnetic writing film.

[0021] In one embodiment, the elastic buffer layer is a double-sided adhesive, which includes an elastic substrate layer and two adhesive layers disposed on both sides of the elastic substrate layer; the adhesive layer on one side of the elastic substrate layer is bonded to the writing substrate, and the adhesive layer on the other side of the elastic substrate layer is bonded to the magnetic writing film.

[0022] By using double-sided adhesive as an elastic buffer layer, the adhesive layers on both sides of the elastic substrate layer can be bonded to the writing substrate and the magnetic writing film respectively.

[0023] In one embodiment, the writing substrate is made of a non-ferromagnetic material. This avoids affecting the movement of magnetic particles in the magnetic writing film during the writing process.

[0024] In one embodiment, the writing substrate includes two layers of clamping plates and a core plate connected between the two layers of clamping plates, wherein the density of the core plate is less than that of the clamping plates; both the core plate and the clamping plates are made of non-ferromagnetic materials.

[0025] Both the core board and the clamping plate are made of non-ferromagnetic materials, thus avoiding interference with the movement of magnetic particles in the magnetic writing film during writing. Using a low-density material for the core board contributes to a lighter overall weight for the writing substrate.

[0026] In one embodiment, the clamping plate is made of pure aluminum plate; and / or, the core board is made of rigid foam board.

[0027] In one embodiment, the teaching writing board further includes a magnetic eraser for erasing the writing marks made by the magnetic pen on the writing board body.

[0028] This application embodiment also provides a push-pull teaching writing board, the push-pull teaching writing board comprising:

[0029] Support components;

[0030] The display screen is mounted on the support assembly;

[0031] At least one fixed writing board is mounted on the support assembly;

[0032] At least one movable writing pad is slidably mounted on the support assembly so that the movable writing pad can switch between a position covering the fixed writing pad and a position covering the display screen;

[0033] The fixed writing board and / or the movable writing board are the teaching writing boards described in any of the above embodiments.

[0034] The aforementioned teaching writing board, when applied to this push-pull type, allows for writing on the transparent writing coating of the magnetic writing film using a magnetic pen. During writing, the magnetic pen attracts the magnetic particles within the magnetic microcapsules of the magnetic writing film. Since the surface film comprises a transparent substrate layer and a transparent writing coating, the writing marks formed by the migration of magnetic particles are visible through the surface film. Alternatively, a liquid writing pen can be used to write on the transparent writing coating of the magnetic writing film. Because the transparent writing coating includes resin and microparticles dispersed in the resin, the writing liquid adheres to the surface of the film when writing with a liquid writing pen, forming marks that are easily erased. Therefore, the teaching writing board of this embodiment is flexibly applicable to both magnetic and liquid writing pens, enhancing the diversity of handwriting colors and writing methods, and improving the presentation effect of the writing on the board.

[0035] This application embodiment also provides a smart blackboard, the smart blackboard including: a support component, a display screen installed on the support component, and a teaching writing board installed on the support component, wherein the writing surface of the teaching writing board is flush with the display surface of the display screen;

[0036] The teaching writing board is any one of the teaching writing boards described in the above embodiments.

[0037] The aforementioned teaching writing board, when applied to the smart blackboard, allows for writing on the transparent writing coating of the magnetic writing film using a magnetic pen. During writing, the magnetic pen attracts the magnetic particles within the magnetic microcapsules of the magnetic writing film. Since the surface film comprises a transparent substrate layer and a transparent writing coating, the writing marks formed by the migration of magnetic particles are visible through the film. Alternatively, a liquid writing pen can be used to write on the transparent writing coating of the magnetic writing film. Because the transparent writing coating includes resin and microparticles dispersed in the resin, the writing liquid adheres to the surface of the film, forming marks that are easily erased. Therefore, the teaching writing board of this embodiment is flexibly applicable to both magnetic and liquid writing pen writing, enhancing the diversity of handwriting colors and methods, and improving the presentation of blackboard writing.

[0038] An embodiment of this application also provides a magnetic writing film, the magnetic writing film comprising: a base film, a magnetic microcapsule layer and a surface film, the magnetic microcapsule layer being attached to one side of the base film, the magnetic microcapsule layer comprising an aqueous adhesive and magnetic microcapsules dispersed in the aqueous adhesive, the magnetic microcapsules comprising a wall material and a core material encapsulated by the wall material, the core material comprising magnetic particles;

[0039] The surface film includes a transparent substrate layer and a transparent writing coating. The transparent substrate layer is disposed on the side of the magnetic microcapsule layer opposite to the bottom film, and the transparent writing coating is disposed on the side of the transparent substrate layer opposite to the magnetic microcapsule layer. The transparent writing coating includes resin and microparticles dispersed in the resin.

[0040] The transparent writing coating is used for writing with magnetic writing pens and liquid writing pens.

[0041] When the aforementioned magnetic writing film is applied to a teaching writing board, it is placed on a writing substrate. A magnetic pen can be used to write on the transparent writing coating of the magnetic writing film. During writing, the magnetic pen can attract the magnetic particles within the magnetic microcapsules of the magnetic writing film to migrate. Because the surface film includes a transparent substrate layer and a transparent writing coating, the writing marks formed by the migration of magnetic particles can be seen through the surface film. A liquid writing pen can also be used to write on the transparent writing coating of the magnetic writing film. Since the transparent writing coating includes resin and microparticles dispersed in the resin, when a liquid writing pen writes on the transparent writing coating, the writing liquid can adhere to the surface of the film to form writing marks, which are easily erased. Therefore, the magnetic writing film of this application embodiment can be flexibly applied to writing with both magnetic and liquid writing pens, improving the diversity of handwriting colors and writing methods, and enhancing the presentation effect of blackboard writing.

[0042] In one embodiment, the particles are silicon dioxide, aluminum oxide, or organic microspheres.

[0043] The microparticles are made of organic microspheres, resulting in a transparent writing coating that produces fine writing, high reflectivity, good scratch resistance, high transmittance, and easy erasure of writing marks. Attached Figure Description

[0044] Figure 1 This is a schematic diagram of the structure of a writing board body according to one embodiment.

[0045] Figure 2 This is a schematic diagram of the structure of a magnetic writing film according to one embodiment.

[0046] Figure 3 This is a schematic diagram of the connection structure of the writing board body, the border structure, and the handwriting recognition module in one embodiment.

[0047] Figure 4 This is a schematic diagram of the structure of a writing tablet body covered with a capacitive touch film according to another embodiment.

[0048] Figure 5 This is a schematic diagram of the structure of a push-pull teaching writing board according to one embodiment.

[0049] Figure label:

[0050] 100. Writing board body; 110. Writing substrate; 111. Clamping plate; 112. Core board; 120. Magnetic writing film; 121. Bottom film; 122. Magnetic microcapsule layer; 123. Surface film; 130. Elastic buffer layer;

[0051] 200. Handwriting recognition module; 210. Infrared transmitting unit; 220. Infrared receiving unit;

[0052] 300. Border structure; 310. First side border; 320. Second side border; 330. Third side border; 340. Fourth side border;

[0053] 410. Upper support component; 420. Upper slide rail; 421. Upper pulley; 422. Upper bracket; 430. Lower support component; 440. Lower slide rail; 441. Lower pulley; 442. Lower bracket; 450. Damper;

[0054] 500. Fixed writing board; 510. Upper connector; 520. Lower connector;

[0055] 600. Activity writing board. Detailed Implementation

[0056] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0057] In the description of this application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and 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, and therefore should not be construed as a limitation of this application.

[0058] Furthermore, where the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0059] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0060] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0061] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application are for illustrative purposes only and do not represent the only possible implementation.

[0062] As described in the background section, related technologies have included using magnetic writing pens to replace chalk and magnetic blackboards to replace traditional blackboards, thus solving the problem of chalk dust. However, the method of writing on magnetic blackboards with magnetic writing pens is too limited, resulting in poor presentation of the writing. This application provides a teaching writing board that is flexibly applicable to both magnetic and liquid writing pens, enhancing the diversity of pen colors and writing methods, and improving the presentation of the writing.

[0063] Please combine Figure 1 and Figure 2 One embodiment of this application provides an instructional writing board, which includes a writing board body 100, a writing substrate 110, and a magnetic writing film 120. The magnetic writing film 120 includes a base film 121, a magnetic microcapsule layer 122, and a surface film 123. The base film 121 is disposed on one side of the writing substrate 110, the magnetic microcapsule layer 122 is attached to the side of the base film 121 facing away from the writing substrate 110, and the surface film 123 is attached to the side of the magnetic microcapsule layer 122 facing away from the base film 121. The magnetic microcapsule layer 122 includes an aqueous adhesive and magnetic microcapsules dispersed in the aqueous adhesive. Each magnetic microcapsule includes a wall material and a core material encapsulated by the wall material. The core material includes magnetic particles.

[0064] The outer film 123 includes a transparent substrate layer and a transparent writing coating. The transparent substrate layer is disposed on the side of the magnetic microcapsule layer 122 facing away from the bottom film 121, and the transparent writing coating is disposed on the side of the transparent substrate layer facing away from the magnetic microcapsule layer 122. The transparent writing coating includes resin and microparticles dispersed in the resin.

[0065] The transparent writing coating is used for writing with magnetic and liquid writing pens.

[0066] Specifically, the base film 121 can be a PET substrate layer. This application embodiment uses a magnetic writing film with magnetic microcapsules. Compared to traditional honeycomb-shaped magnetic films, the microcapsules are very small, which can significantly improve the resolution and clarity of handwriting.

[0067] In educational activities, a magnetic pen can be used to write on the transparent writing coating of the magnetic writing film 120. During the writing process, the magnetic pen can attract the magnetic particles within the magnetic microcapsules of the magnetic writing film 120 to migrate. Since the surface film 123 consists of a transparent substrate layer and a transparent writing coating, the writing marks formed by the migration of magnetic particles can be seen through the surface film 123. The specific structure of the magnetic pen can be found in existing technology and will not be described in detail here.

[0068] The teaching writing board in this embodiment can be used not only for writing with magnetic pens but also for writing with liquid pens. Since the transparent writing coating includes resin and particles dispersed in the resin, when a liquid pen writes on the transparent writing coating, the writing fluid can adhere to the film surface 123 to form handwriting, which is easily erased. Here, a liquid pen can be understood as a writing pen that uses a liquid writing medium (i.e., writing fluid). The liquid pen transfers the writing fluid to the writing surface through the pen tip, thereby achieving the writing function. Liquid pen types include, for example, liquid writing pens, film-forming pens, and highlighters. When different colors of writing are needed for demonstration in teaching activities, various colored liquid writing pens can be selected, thereby increasing the diversity of handwriting colors. Furthermore, this film 123 is anti-glare, anti-fingerprint, and scratch-resistant.

[0069] The aforementioned teaching writing board allows for writing on the transparent writing coating of the magnetic writing film 120 using a magnetic pen. During writing, the magnetic pen attracts the magnetic particles within the magnetic microcapsules of the magnetic writing film 120. Since the surface film 123 comprises a transparent substrate layer and a transparent writing coating, the writing marks formed by the migration of magnetic particles can be seen through the surface film 123. Alternatively, a liquid writing pen can be used to write on the transparent writing coating of the magnetic writing film 120. Because the transparent writing coating includes resin and microparticles dispersed in the resin, when the liquid writing pen writes on the transparent writing coating, the writing liquid can adhere to the surface of the surface film 123 to form writing marks, which are easily erased. Therefore, the teaching writing board of this embodiment can be flexibly applied to both magnetic and liquid writing pen writing, enhancing the diversity of handwriting colors and writing methods, and improving the presentation effect of the writing on the board.

[0070] For example, the wall material can be a mixture of anionic and cationic polymers. The core material can be a mixture of magnetic particles, non-magnetic particles, oily solvents, and suspension stabilizers. The cationic polymer includes one or two of gelatin and ε-polylysine; the anionic polymer includes one or more of sodium carboxymethyl cellulose, gum arabic, and sodium alginate; the magnetic particles include one or two of nano-ferric oxide and oleophilic nano-ferrite or nano-neodymium iron boron; the non-magnetic particles are oleophilic nano-titanium dioxide (i.e., oleophilic nano-titanium dioxide). The aqueous adhesive includes one or more of PVA aqueous solution, polyurethane, ultraviolet absorber, and leveling agent.

[0071] The magnetic microcapsules provided in this application use a compounded anionic and cationic polymer as the wall material to enhance the strength of the microcapsules, preventing unclear handwriting caused by capsule wall damage during writing. The magnetic particles are composed of nano-ferrite or nano-neodymium iron boron and nano-ferric oxide with different magnetic strengths. By adjusting the proportion of these magnetic particles, the magnetic force can be controlled, facilitating writing and erasing, and improving writing blackness and contrast. Furthermore, using white oil, paraffin wax, etc., as oil-based solvents can adjust the solution polarity, ensuring that magnetic and non-magnetic particles are stably and uniformly dispersed in the oil phase. By adding suspending stabilizers such as phthalates and polyamide waxes, a stable cross-linked network structure and electrostatic adsorption layer are formed in the oil phase, preventing particle sedimentation and aggregation, ensuring smooth writing and durable traces. The magnetic microcapsules significantly improve the performance of the magnetic film in terms of blackness, contrast, and stability, making it better suited for various application scenarios such as education, office, home, and commerce.

[0072] Specifically, the transparent substrate layer can be made of PET (polyethylene terephthalate), which has high transparency, excellent mechanical strength, and chemical resistance. After biaxial stretching, it has better optical uniformity and dimensional stability.

[0073] The particle size should be in the nanometer to micrometer range to form uniform particles in the transparent writing coating, which is beneficial for the adhesion of writing fluid in the liquid writing pen.

[0074] The particles can be silicon dioxide (SiO2), aluminum oxide (Al2O3), or organic microspheres.

[0075] Preferably, the microparticles are organic microspheres (polymethyl methacrylate, PMMA). The transparent writing coating made in this way produces fine writing, high reflectivity, good scratch resistance, high transmittance, and easy erasure of writing marks.

[0076] Preferably, the organic microspheres have a particle size of 3 to 5 micrometers and a refractive index of 1.49.

[0077] For example, the transparent writing coating of this application embodiment can be prepared by the following method:

[0078] Coating preparation: Mix resin, microparticles (5-20% by mass) with solvent, and control the particle size to 3-5 μm;

[0079] First, pour the resin into a container, then add solvent in a certain proportion and stir until the resin is fully dissolved. Next, slowly add the organic microspheres into the resin solution and continue stirring to ensure that the organic microspheres are evenly dispersed in the resin solution.

[0080] Precision coating: Use micro-gravure or slot extrusion coating, with a wet coating thickness of 10-50μm;

[0081] Specifically, the mixed solution is applied onto a transparent substrate layer.

[0082] Pre-drying: Remove the solvent at 80-100℃ while preserving the surface microstructure;

[0083] UV curing: Curing with 1000-3000mJ / cm² ultraviolet light to form a transparent writing coating.

[0084] Specifically, the resins used include, for example, epoxy resin and acrylic resin. The appropriate solvent is selected based on the type of resin used. Common solvents for epoxy resins include acetone, methyl ethyl ketone (MEK), and toluene; for acrylic resins, ethanol, isopropanol, and ethyl acetate are commonly used. The role of the solvent is to dilute the resin, reduce its viscosity, facilitate uniform mixing with the organic microspheres, and allow the mixture to flow better during application, forming a uniform writing layer.

[0085] After forming a transparent writing coating on the transparent substrate layer as described above, the surface film is obtained. A magnetic microcapsule layer can be formed by mixing magnetic microcapsules and water-based adhesive in a certain ratio (e.g., 6:4, 7:3, etc.) and then coating the mixture onto the surface film. Finally, a rubber-based self-adhesive and a PET substrate (i.e., a base film) are bonded to the side of the magnetic microcapsule layer facing away from the surface film to obtain the magnetic writing film.

[0086] The preparation method for magnetic microcapsules can refer to the following steps:

[0087] S100: Magnetic particles and non-magnetic particles are added to an oily solvent at a preset mass ratio to obtain an oil phase mixture;

[0088] Specifically, an oil phase mixture can be obtained by adding 1g of nano-ferrite with an average particle size of 400nm to 800nm, 1.5g of nano-iron oxide with an average particle size of 200nm to 500nm, and 9g of titanium dioxide with an average particle size of 200nm to 500nm to an oily solvent with a mass ratio of 1:1.5:9, and 1g of white oil and 7g of paraffin wax.

[0089] S200: After adding a suspension stabilizer to the oil phase mixture, it is dispersed at a preset dispersion rate to obtain a core material suspension;

[0090] Specifically, 0.1 wt% of a suspension stabilizer can be added to the oil phase mixture, and then the oil phase mixture can be dispersed in a high-speed disperser at 25°C for 60 minutes to obtain a core material suspension.

[0091] S300: Add cationic polymer and anionic polymer to deionized water at a preset mass ratio to obtain an aqueous solution;

[0092] Specifically, 1g of gelatin and 1g of sodium carboxymethyl cellulose were added to 100g of deionized water to obtain an aqueous solution.

[0093] S400: The core material suspension is added to the aqueous solution, and the core material suspension is dispersed by stirring to obtain a dispersion.

[0094] Specifically, the above core material suspension was added to the aqueous solution at a mass ratio of 1:7, and the suspension was dispersed by stirring at 500 rpm to obtain a dispersion.

[0095] S500: Add an acid-base adjuster to the dispersion to adjust the pH to the preset value. After the first preset reaction time, add a curing agent and continue the reaction for a second preset time to obtain magnetic microcapsules.

[0096] Specifically, glacial acetic acid was added to the dispersion to adjust the pH to 4.5. After reacting for 0.5 hours, 1g of glutaraldehyde was added as a curing agent, and the reaction was continued for another 0.5 hours to obtain magnetic microcapsules.

[0097] In some teaching activities, teachers cannot save their notes on the blackboard, making it inconvenient for students to review the material after class. Therefore, please refer to... Figure 3 In one embodiment, the teaching writing board further includes a handwriting recognition module 200, which is used to recognize handwriting information written on the magnetic writing film 120. The handwriting recognition module 200 is installed on the writing board body 100.

[0098] The handwriting recognition module 200 can recognize the handwriting information written on the magnetic writing film 120, thereby recognizing the blackboard content written by the teacher during teaching, and thus facilitating the saving of the blackboard content based on the recognition results of the handwriting recognition module 200.

[0099] Specifically, the handwriting recognition module 200 can be connected to the computer host for communication, and the recognition result of the handwriting recognition module 200 can be transmitted to the computer host in real time, so that the computer host can save the whiteboard content according to the recognition result of the handwriting recognition module 200.

[0100] Please refer to Figure 3 In one embodiment, the teaching writing board further includes a border structure 300, which includes four side borders, each corresponding to one of the four sides of the writing board body 100. Specifically, the four side borders are a first side border 310 and a second side border 320 arranged opposite each other, and a third side border 330 and a fourth side border 340 arranged opposite each other. Optionally, the relative arrangement direction of the first side border 310 and the second side border 320 is perpendicular to the relative arrangement direction of the third side border 330 and the fourth side border 340. For example, the writing board body 100 has a rectangular outline. The first side border 310 and the second side border 320 are arranged opposite each other along the width direction of the writing board body 100 and are respectively arranged on the two longer sides of the writing board body 100; the third side border 330 and the fourth side border 340 are arranged opposite each other along the length direction of the writing board body 100 and are respectively arranged on the two shorter sides of the writing board body 100.

[0101] The handwriting recognition module 200 includes an infrared emitting unit 210 and an infrared receiving unit 220 disposed on the side frame. In each pair of opposite side frames, one side frame is provided with multiple infrared emitting units 210, and the other side frame is provided with multiple infrared receiving units 220 corresponding to the multiple infrared emitting units 210.

[0102] Specifically Figure 3In the illustrated embodiment, the first side frame 310 and the second side frame 320 are arranged opposite to each other. The first side frame 310 has a plurality of infrared emitting units 210 arranged along its length. The second side frame 320 has a plurality of infrared receiving units 220 arranged along its length. Each infrared receiving unit 220 corresponds one-to-one with each infrared emitting unit 210. The infrared emitting unit 210 emits infrared rays towards its corresponding infrared receiving unit 220, enabling the corresponding infrared receiving unit 220 to receive the infrared rays.

[0103] Similarly, in the opposing third side frame 330 and fourth side frame 340, the third side frame 330 is provided with a plurality of infrared emitting units 210 arranged along the length direction of the third side frame 330; the fourth side frame 340 is provided with a plurality of infrared receiving units 220 arranged along the length direction of the fourth side frame 340. Each infrared receiving unit 220 corresponds one-to-one with each of the infrared emitting units 210. The infrared emitting unit 210 emits infrared rays toward its corresponding infrared receiving unit 220 so that the corresponding infrared receiving unit 220 can receive the infrared rays.

[0104] Multiple infrared rays emitted along the width of the writing pad 100 intersect with multiple infrared rays emitted along the length of the writing pad 100, forming multiple intersection points, each corresponding to a different position coordinate. When writing on the writing pad 100 with a magnetic pen, the pen blocks the transmission of infrared rays at a certain coordinate, preventing the infrared receiving units 220 corresponding to the infrared rays in both directions at that coordinate from receiving complete infrared signals. Based on the infrared receiving units 220 that cannot receive complete infrared signals, the position coordinates of the magnetic pen can be determined. By sending the position coordinates of the magnetic pen to the computer host in real time, the computer host can obtain and save the written handwriting using this position coordinate information.

[0105] Please refer to Figure 4 In another embodiment, the handwriting recognition module 200 can also be a capacitive touch film covering the surface film 123. When writing on the writing pad body 100 with a magnetic pen, writing is performed on the capacitive touch film. When the magnetic pen writes at a certain coordinate on the capacitive touch film, it can change the capacitance value at that coordinate on the capacitive touch film. The computer host can then determine the change in the movement path of the magnetic pen based on the real-time change in the capacitance value at each coordinate on the capacitive touch film, thereby obtaining and saving the written handwriting.

[0106] Please refer to Figure 2 In one embodiment, the writing board body 100 further includes an elastic buffer layer 130, which is disposed between the writing substrate 110 and the magnetic writing film 120.

[0107] When writing on the magnetic writing film 120, the elastic buffer layer 130 can provide cushioning force, making the writing feel soft and smooth, and can also provide impact resistance to the magnetic writing film 120, thereby protecting the magnetic writing film 120.

[0108] In one embodiment, the elastic buffer layer 130 is a double-sided adhesive, which includes an elastic substrate layer and two adhesive layers disposed on both sides of the elastic substrate layer. The adhesive layer on one side of the elastic substrate layer is bonded to the writing substrate 110, and the adhesive layer on the other side of the elastic substrate layer is bonded to the magnetic writing film 120.

[0109] By using double-sided adhesive as the elastic buffer layer 130, the adhesive layers on both sides of the elastic substrate layer can be bonded to the writing substrate 110 and the magnetic writing film 120 respectively.

[0110] The elastic substrate layer can be PE foam. By using PE foam double-sided adhesive, bonding can be provided between the writing substrate 110 and the magnetic writing film 120, which has the characteristics of strong adhesion, good holding power, good waterproof performance, strong temperature resistance, and strong UV protection.

[0111] In one embodiment, the writing substrate 110 is made of a non-ferromagnetic material, thereby avoiding affecting the movement of magnetic particles in the magnetic writing film 120 during the writing process.

[0112] refer to Figure 2 In one embodiment, the writing substrate 110 includes two layers of clamping plates 111 and a core plate 112 connected between the two layers of clamping plates 111. The density of the core plate 112 is less than that of the clamping plates 111. Both the core plate 112 and the clamping plates 111 are made of non-ferromagnetic materials.

[0113] Both the core board 112 and the clamping plate 111 are made of non-ferromagnetic materials, which avoids affecting the movement of magnetic particles in the magnetic writing film 120 during writing. Using a material with low density to make the core board 112 contributes to a lighter overall weight for the writing substrate 110.

[0114] The clamp 111 can be made of a material with a smooth surface and a relatively hard texture compared to the core board 112, in order to improve the smoothness of writing and enhance the support of the writing substrate 110.

[0115] Specifically, the plywood 111 can be made of pure aluminum sheet. The core board 112 can be made of rigid foam board.

[0116] In one embodiment, the teaching writing board also includes a magnetic eraser for erasing the writing marks made by the magnetic pen on the writing board body.

[0117] A magnetic pen can be used to write on the writing board. Conversely, a magnetic eraser can be used to erase the writing. Therefore, this embodiment utilizes the principle of magnetism to achieve both writing and erasing, and both processes are very clean and do not produce dust pollution.

[0118] Please refer to Figure 4 One embodiment of this application also provides a push-pull teaching writing board, which includes: a support assembly, a display screen, at least one fixed writing board 500, and at least one movable writing board 600. The display screen is mounted on the support assembly. The fixed writing board 500 is mounted on the support assembly. The movable writing board is slidably mounted on the support assembly so that the movable writing board can switch between a position covering the fixed writing board 500 and a position covering the display screen. The fixed writing board 500 and / or the movable writing board is a teaching writing board of any of the above embodiments.

[0119] For example, there are two fixed writing pads 500, and the display screen is positioned between the two fixed writing pads 500. There are also two movable writing pads 600. When the two movable writing pads 600 slide towards each other, they can jointly cover the display screen. When the two movable writing pads 600 slide away from each other, they can each cover their respective fixed writing pad 500, thus exposing the display screen.

[0120] Of course, there can be one fixed writing board 500 and one movable writing board 600. Alternatively, there can be more fixed writing boards 500 and more movable writing boards 600.

[0121] The aforementioned teaching writing board, when applied to this push-pull type, allows for writing on the transparent writing coating of the magnetic writing film 120 using a magnetic pen. During writing, the magnetic pen attracts the magnetic particles within the magnetic microcapsules of the magnetic writing film 120. Since the surface film 123 comprises a transparent substrate layer and a transparent writing coating, the writing marks formed by the migration of magnetic particles can be seen through the surface film 123. Alternatively, a liquid writing pen can be used to write on the transparent writing coating of the magnetic writing film 120. Because the transparent writing coating includes resin and microparticles dispersed in the resin, when the liquid writing pen writes on the transparent writing coating, the writing liquid adheres to the surface of the surface film 123, forming writing marks that are easily erased. Therefore, the teaching writing board of this embodiment can be flexibly applied to both magnetic and liquid writing pens, enhancing the diversity of handwriting colors and writing methods, and improving the presentation effect of the writing on the board.

[0122] refer to Figure 4 In one embodiment, the support assembly includes an upper support 410, an upper slide rail 420, a lower support 430, and a lower slide rail 440. The upper support 410 and the lower support 430 are used to fix the support to the wall of the classroom.

[0123] The upper end of the fixed writing board 500 is fixed to the upper slide rail 420 via the upper connector 510, and the lower end is fixed to the lower slide rail 440 via the lower connector 520. The upper end of the movable writing board 600 is slidably connected to the upper slide rail 420 via the upper pulley 421, and the lower end is slidably connected to the lower slide rail 440 via the lower pulley 441. The upper pulley 421 is connected to the upper end of the movable writing board 600 via the upper bracket 422, and the lower pulley 441 is connected to the lower end of the movable writing board 600 via the lower bracket 442. In this way, the movable writing board 600 can slide relative to the fixed writing board 500.

[0124] refer to Figure 4 In one embodiment, a damper 450 is also provided on the upper slide rail 420. A damper 450 can be provided at any end or both ends of the sliding stroke range of the movable writing board 600 to facilitate the movable writing board 600 to slowly slide into place when it moves to the end of its stroke range.

[0125] One embodiment of this application also provides a smart blackboard, which includes: a support component, a display screen mounted on the support component, and a teaching writing board mounted on the support component, wherein the writing surface of the teaching writing board is flush with the display surface of the display screen. The teaching writing board is any of the teaching writing boards described in the above embodiments.

[0126] The aforementioned teaching writing board, when applied to the smart blackboard, allows for writing on the transparent writing coating of the magnetic writing film 120 using a magnetic pen. During writing, the magnetic pen attracts the magnetic particles within the magnetic microcapsules of the magnetic writing film 120. Since the surface film 123 comprises a transparent substrate layer and a transparent writing coating, the writing marks formed by the migration of magnetic particles can be seen through the surface film 123. Alternatively, a liquid writing pen can be used to write on the transparent writing coating of the magnetic writing film 120. Because the transparent writing coating includes resin and microparticles dispersed in the resin, when the liquid writing pen writes on the transparent writing coating, the writing liquid adheres to the surface of the surface film 123, forming marks that are easily erased. Therefore, the teaching writing board of this embodiment is flexibly applicable to both magnetic and liquid writing pen writing, enhancing the diversity of handwriting colors and writing methods, and improving the presentation effect of the blackboard writing.

[0127] Please refer to Figure 2 An embodiment of this application also provides a magnetic writing film 120, which includes: a base film 121, a magnetic microcapsule layer 122, and a surface film 123. The magnetic microcapsule layer 122 is attached to one side of the base film 121. The magnetic microcapsule layer 122 includes an aqueous adhesive and magnetic microcapsules dispersed in the aqueous adhesive. The magnetic microcapsules include a wall material and a core material wrapped by the wall material. The core material includes magnetic particles.

[0128] The surface film 123 includes a transparent substrate layer and a transparent writing coating. The transparent substrate layer is disposed on the side of the magnetic microcapsule layer 122 facing away from the bottom film 121, and the transparent writing coating is disposed on the side of the transparent substrate layer facing away from the magnetic microcapsule layer 122. The transparent writing coating includes resin and microparticles dispersed in the resin.

[0129] The transparent writing coating is used for writing with magnetic and liquid writing pens.

[0130] The aforementioned magnetic writing film 120 is applied to a teaching writing board and disposed on a writing substrate 110. Magnetic writing pens can be used to write on the transparent writing coating of the magnetic writing film 120. During writing, the magnetic writing pen can attract the magnetic particles within the magnetic microcapsules of the magnetic writing film 120. Since the surface film 123 comprises a transparent substrate layer and a transparent writing coating, the writing marks formed by the migration of magnetic particles can be seen through the surface film 123. Liquid writing pens can also be used to write on the transparent writing coating of the magnetic writing film 120. Since the transparent writing coating includes resin and microparticles dispersed in the resin, when a liquid writing pen writes on the transparent writing coating, the writing liquid can adhere to the surface of the surface film 123 to form writing marks, which are easily erased. Therefore, the magnetic writing film 120 of this embodiment can be flexibly applied to writing with both magnetic and liquid writing pens, improving the diversity of writing colors and methods, and enhancing the presentation effect of blackboard writing.

[0131] In one embodiment, the particles are silicon dioxide, aluminum oxide, or organic microspheres.

[0132] The microparticles are made of organic microspheres, resulting in a transparent writing coating that produces fine writing, high reflectivity, good scratch resistance, high transmittance, and easy erasure of writing marks.

[0133] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0134] The above embodiments merely illustrate several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A teaching writing board, characterized in that, The teaching writing board includes a writing board body, and the writing board body includes: Writing substrate; and A magnetic writing film includes a base film, a magnetic microcapsule layer, and a surface film. The base film is disposed on one side of the writing substrate, and the magnetic microcapsule layer is attached to the side of the base film facing away from the writing substrate. The magnetic microcapsule layer includes an aqueous adhesive and magnetic microcapsules dispersed in the aqueous adhesive. The magnetic microcapsules include a wall material and a core material wrapped by the wall material. The core material includes magnetic particles. The surface film includes a transparent substrate layer and a transparent writing coating. The transparent substrate layer is disposed on the side of the magnetic microcapsule layer opposite to the bottom film, and the transparent writing coating is disposed on the side of the transparent substrate layer opposite to the magnetic microcapsule layer. The transparent writing coating includes resin and microparticles dispersed in the resin. The transparent writing coating is used for writing with magnetic writing pens and liquid writing pens.

2. The teaching writing board according to claim 1, characterized in that, It also includes a handwriting recognition module, which is installed on the writing board body and is used to recognize the handwriting information written on the magnetic writing film.

3. The teaching writing board according to claim 2, characterized in that, It also includes a border structure, which includes four side borders, each of which is correspondingly arranged on the four sides of the writing board body; the handwriting recognition module includes an infrared emitting unit and an infrared receiving unit disposed on the side borders. In each pair of opposing side frames, one side frame is provided with a plurality of infrared emitting units, and the other side frame is provided with a plurality of infrared receiving units corresponding one-to-one with the plurality of infrared emitting units.

4. The teaching writing board according to claim 2, characterized in that, The handwriting recognition module is a capacitive touch film covering the surface film.

5. The teaching writing board according to claim 1, characterized in that, The writing board body also includes an elastic buffer layer, which is disposed between the writing substrate and the magnetic writing film.

6. The teaching writing board according to claim 5, characterized in that, The elastic buffer layer is a double-sided adhesive, which includes an elastic substrate layer and two adhesive layers disposed on both sides of the elastic substrate layer; the adhesive layer on one side of the elastic substrate layer is bonded to the writing substrate, and the adhesive layer on the other side of the elastic substrate layer is bonded to the magnetic writing film.

7. The teaching writing board according to claim 1, characterized in that, The writing substrate is made of a non-ferromagnetic material.

8. The teaching writing board according to claim 7, characterized in that, The writing substrate includes two layers of clamping plates and a core plate connected between the two layers of clamping plates. The density of the core plate is less than that of the clamping plates. Both the core plate and the clamping plates are made of non-ferromagnetic materials.

9. The teaching writing board according to claim 8, characterized in that, The clamping plate is made of pure aluminum plate; and / or the core board is made of rigid foam board.

10. The teaching writing board according to claim 1, characterized in that, It also includes a magnetic eraser, which is used to erase the writing of the magnetic pen on the writing board body.

11. A push-pull teaching writing board, characterized in that, The push-pull teaching writing board includes: Support components; The display screen is mounted on the support assembly; At least one fixed writing board is mounted on the support assembly; At least one movable writing pad is slidably mounted on the support assembly so that the movable writing pad can switch between a position covering the fixed writing pad and a position covering the display screen; The fixed writing board and / or the movable writing board are the teaching writing boards according to any one of claims 1-10.

12. A smart blackboard, characterized in that, The smart blackboard includes: a support component, a display screen mounted on the support component, and a teaching writing board mounted on the support component, wherein the writing surface of the teaching writing board is flush with the display surface of the display screen; The teaching writing board is the teaching writing board according to any one of claims 1-10.

13. A magnetic writing film, characterized in that, The magnetic writing membrane includes: a base film, a magnetic microcapsule layer, and a surface film. The magnetic microcapsule layer is attached to one side of the base film. The magnetic microcapsule layer includes an aqueous adhesive and magnetic microcapsules dispersed in the aqueous adhesive. The magnetic microcapsules include a wall material and a core material wrapped by the wall material. The core material includes magnetic particles. The surface film includes a transparent substrate layer and a transparent writing coating. The transparent substrate layer is disposed on the side of the magnetic microcapsule layer opposite to the bottom film, and the transparent writing coating is disposed on the side of the transparent substrate layer opposite to the magnetic microcapsule layer. The transparent writing coating includes resin and microparticles dispersed in the resin. The transparent writing coating is used for writing with magnetic writing pens and liquid writing pens.

14. The magnetic writing film according to claim 13, characterized in that, The particles are silicon dioxide (SiO2), aluminum oxide (Al2O3), or organic microspheres.

Images