Sub-screen of smart blackboard

Abstract

The application relates to a sub-screen and a smart blackboard. The smart blackboard comprises a main screen and a sub-screen connected with the main screen. The sub-screen comprises a panel, a back plate and an adapter assembly. The back plate is stacked with the panel along the thickness direction of the panel, and a supporting protrusion is formed on the side of the back plate facing the panel, and the supporting protrusion is in abutment with the panel; the adapter assembly is arranged on the side of the back plate away from the panel, and is used for being connected with the main screen. The application omits the honeycomb layer in the traditional scheme, and the supporting protrusion is integrally formed on the back plate and is in abutment with the panel, thereby providing additional support and stability, and the pressing abnormal sound problem caused by local stress bending can be effectively reduced, and the overall quality and user experience of the product are improved. The supporting protrusion is directly formed on the back plate, so that the panel and the back plate can be fixed in a laminated mode through adhesion or the like, and the complex steps of adhesion of the panel and the back plate on the two sides of the honeycomb layer in the traditional sub-screen are not needed.

Description

Technical Field

[0001] This application relates to the field of teaching aids technology, and in particular to a secondary screen for a smart blackboard. Background Technology

[0002] Traditional smart blackboard secondary screen designs mainly use aluminum honeycomb or plastic honeycomb as the secondary screen interlayer, and the aluminum honeycomb layer is glued and fixed between the painted panel and the galvanized steel plate by spraying adhesive.

[0003] However, traditional secondary screens, due to their relatively thin aluminum honeycomb single-layer material (generally 0.04~0.08mm), may produce abnormal noises at localized stress bending points after adhesive application, especially when pressed. This noise not only affects the overall product quality but also the user experience. Furthermore, the assembly process for traditional secondary screens is quite cumbersome, requiring adhesive application to both sides for bonding and fixing, as well as the assembly of multiple components such as the secondary screen baffle, corner brackets, and positioning grooves, increasing manufacturing complexity and time costs.

[0004] The above information disclosed in the background art of this application is only for understanding the background of the concept of this application, and does not indicate or imply that it includes information of the prior art. Summary of the Invention

[0005] Therefore, it is necessary to provide a secondary screen for a smart blackboard to address the above-mentioned problems.

[0006] This application provides a secondary screen for a smart blackboard, which includes:

[0007] panel;

[0008] A back panel, which is stacked with the front panel along the thickness direction of the front panel, and a supporting protrusion is formed on the side of the back panel facing the front panel, the supporting protrusion abutting against the front panel; and

[0009] An adapter assembly is disposed on the side of the back panel facing away from the front panel, and the adapter assembly is used to connect to the main screen.

[0010] The aforementioned smart blackboard's secondary screen achieves at least the following beneficial effects: This application omits the honeycomb layer found in traditional solutions. A supporting protrusion is integrally formed on the back panel, abutting against the front panel, thus providing additional support and stability. This effectively reduces pressing noise caused by localized stress bending, improving overall product quality and user experience. By directly forming the supporting protrusion integrally on the back panel, this application allows for direct layering and fixing of the front and back panels using adhesives or other methods. This eliminates the need for the complex steps of separately adhesiveting the front and back panels on both sides of the honeycomb layer, as is required with traditional secondary screens. This reduces reliance on high-cost materials (such as aluminum honeycomb), lowers overall material costs, simplifies manufacturing and assembly processes, and reduces time and labor costs.

[0011] In one embodiment, the number of support protrusions is set to multiple, and the multiple support protrusions are spaced apart. The multiple support protrusions can be manufactured integrally with the back panel through a single molding process, simplifying the manufacturing process and reducing production complexity and cost. By providing multiple support protrusions on the back panel, support can be provided over a larger area, further improving the overall rigidity and stability of the sub-screen and reducing the problem of abnormal noise when pressed. Multiple spaced support protrusions can evenly distribute the stress on the panel to the back panel, reducing localized stress concentration and thus reducing the risk of panel deformation and damage.

[0012] In one embodiment, a reinforcing rib protrudes from the side of the back panel facing away from the front panel. The reinforcing rib can be integrally manufactured with the back panel using a mold-forming process, simplifying the production process and reducing manufacturing complexity and cost. The reinforcing rib significantly improves the back panel's resistance to bending and torsion, effectively absorbing and dispersing external impact forces, reducing the risk of deformation and damage to the back panel and front panel under external forces, and enhancing the product's durability and reliability.

[0013] In one embodiment, the reinforcing rib includes a plurality of first reinforcing ribs, each extending along a first direction, and the plurality of first reinforcing ribs are spaced apart along a second direction, the second direction being at an angle to the first direction. The provision of multiple first reinforcing ribs provides multi-point support, significantly improving the overall rigidity and deformation resistance of the backplate. Since the backplate and its first reinforcing ribs are essentially a single unit, this embodiment, by rationally designing the shape, number, and spacing of the first reinforcing ribs, can improve the structural strength of the backplate while reducing its overall weight, achieving a lightweight design.

[0014] In one embodiment, the reinforcing rib further includes a second reinforcing rib extending along a second direction, and any one of the first reinforcing ribs and the second reinforcing rib is staggered. The staggered arrangement of the first and second reinforcing ribs can be roughly considered as forming a grid-like structure, which not only provides strong support and significantly improves the overall rigidity and deformation resistance of the back panel, but also more evenly distributes the stress on the panel and back panel, reduces local stress concentration, and lowers the risk of deformation and damage.

[0015] In one embodiment, multiple second reinforcing ribs are provided, arranged at intervals along the first direction, with any first reinforcing rib interleaved with any second reinforcing rib. Providing multiple second reinforcing ribs, together with multiple first reinforcing ribs, can significantly improve the overall rigidity and deformation resistance of the back plate. Since the back plate and its second reinforcing ribs are essentially a single unit, this embodiment, through the rational design of the shape, number, and spacing of adjacent second reinforcing ribs, can improve the structural strength of the back plate while reducing its overall weight, achieving a lightweight design.

[0016] In one embodiment, the first direction is perpendicular to the second direction. Because the first and second directions are perpendicular, the staggered first and second reinforcing ribs form a rectangular or square grid structure. This structure provides strong support in both vertical directions, significantly improving the overall rigidity and deformation resistance of the backplate.

[0017] In one embodiment, the adapter assembly includes an adapter frame, fasteners, and a support pad. The support pad is sandwiched between the front panel and the back panel, and the adapter frame is located on the side of the back panel facing away from the support pad. The fastener passes through the adapter frame and the back panel to secure it to the support pad. Taking self-tapping screws as an example, since this application omits the honeycomb layer in the traditional secondary screen, the self-tapping screws need to be directly threaded to the back panel, which is prone to stripping. This results in unreliable connections between the back panel, fasteners, and adapter frame; that is, the entire adapter assembly is unreliably connected to the back panel. Since the secondary screen is connected to the main screen through the adapter assembly, if the adapter assembly is unreliable, the secondary screen is prone to shaking or even falling off, causing damage. Therefore, this embodiment adds a support pad, which can be tightly connected to fasteners such as self-tapping screws, avoiding stripping of the self-tapping screws and achieving a reliable connection between the adapter assembly and the secondary screen.

[0018] In one embodiment, the support pad is located at the edge of the back panel, and the edge of the panel has a flange that wraps around and abuts against the support pad to restrict its movement. By forming a flange at the edge of the panel and wrapping it around the support pad, the movement of the support pad can be effectively restricted, preventing it from shifting due to vibration or external forces during use, ensuring that the support pad is always in a predetermined position, thereby improving the stability of the entire structure.

[0019] In one embodiment, the fastener is a self-tapping screw.

[0020] In one embodiment, the support pad is a flexible support pad. When the fastener is a self-tapping screw, the flexible support pad can prevent the self-tapping screw from stripping. Furthermore, the flexible support pad has good elasticity and cushioning properties, and can also absorb and mitigate external impacts to a certain extent, reducing direct impacts on the panel and back panel.

[0021] In one embodiment, the adapter assembly further includes a clamping member connected to the adapter frame.

[0022] In one embodiment, the number of adapter components is set to multiple, and the multiple adapter components are spaced apart on one side edge of the back plate. The multiple adapter components spaced apart on one side edge of the back plate can provide more connection points, evenly distribute the stress acting on the back plate, avoid excessive stress on a single connection point, reduce stress concentration, thereby improving the stability and firmness of the overall connection, and preventing the components from loosening or falling off during use.

[0023] In one embodiment, the back panel is integrally vacuum-formed. This integral vacuum-forming process allows multiple components to be combined into a single unit, eliminating weak points in the connections between components and improving the overall structural strength and durability. This also eliminates the need for separate manufacturing and subsequent assembly of multiple materials such as sheet metal sub-screen baffles, plastic positioning grooves, and honeycomb layers, as required by traditional solutions. This simplifies the production process and significantly reduces material costs, assembly steps, and time.

[0024] In one embodiment, the secondary screen further includes a baffle integrally formed with the back panel, the baffle and the adapter assembly being respectively disposed on two opposite edges of the back panel.

[0025] In one embodiment, a positioning recess is formed on one edge of the back panel, which is used to engage and limit the positioning protrusion on the main screen. By forming the positioning recess directly on the back panel, the molds and materials required for separately manufacturing the positioning recess can be eliminated, thereby simplifying the manufacturing process and reducing production complexity and cost. In addition, the positioning recess is integrally formed on the back panel, which also avoids additional assembly steps, reduces labor and time costs, and improves production efficiency.

[0026] In one embodiment, a positioning protrusion is formed on one edge of the back panel, which is used to engage and limit the positioning with a positioning recess on the main screen. By forming the positioning protrusion directly on the back panel, the molds and materials required for separately manufacturing the positioning protrusion can be eliminated, thereby simplifying the manufacturing process and reducing production complexity and cost. In addition, the positioning protrusion is integrally formed on the back panel, which also avoids additional assembly steps, reduces labor and time costs, and improves production efficiency. Attached Figure Description

[0027] To more clearly illustrate the technical solutions in the embodiments of this application or the conventional technology, the drawings used in the description of the embodiments or the conventional technology will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0028] Figure 1 This is a schematic diagram of the structure of a secondary screen provided in one embodiment of this application.

[0029] Figure 2 This is an exploded view of a portion of the sub-screen provided in one embodiment of this application.

[0030] Figure 3 This is another schematic diagram of the structure of a secondary screen provided in one embodiment of this application.

[0031] Figure 4 For the purposes of this application Figure 3 A partially enlarged schematic diagram of the secondary screen at point A provided in the embodiment.

[0032] Figure 5 For the purposes of this application Figure 3 A partially enlarged schematic diagram of the secondary screen at point B provided in the embodiment.

[0033] Figure 6 This is a partially enlarged schematic diagram of a secondary screen provided in one embodiment of this application.

[0034] Figure 7 This is a partially enlarged cross-sectional view of a sub-screen provided in one embodiment of this application.

[0035] Figure 8 This is a schematic diagram of the structure of a smart blackboard provided in one embodiment of this application.

[0036] Figure label:

[0037] 10. Smart Blackboard; 11. Main Screen; 12. Secondary Screen; 100. Panel; 110. Flip Edge; 200. Back Panel; 210. Support Protrusion; 220. Reinforcing Rib; 221. First Reinforcing Rib; 222. Second Reinforcing Rib; 230. Baffle; 240. Positioning Recess; 300. Adapter Assembly; 310. Adapter Frame; 320. Clamping Component; 330. Support Pad; D1. First Direction; D2. Second Direction. Detailed Implementation

[0038] 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.

[0039] Traditional smart blackboard secondary screen designs mainly use aluminum honeycomb or plastic honeycomb as the secondary screen interlayer, and the aluminum honeycomb layer is glued and fixed between the painted panel and the galvanized steel plate by spraying adhesive.

[0040] However, traditional secondary screens, due to their relatively thin aluminum honeycomb single-layer material (generally 0.04~0.08mm), may produce abnormal noises at localized stress bending points after adhesive application, especially when pressed. This noise not only affects the overall product quality but also the user experience. Furthermore, the assembly process for traditional secondary screens is quite cumbersome, requiring adhesive application to both sides for bonding and fixing, as well as the assembly of multiple components such as the secondary screen baffle, corner brackets, and positioning grooves, increasing manufacturing complexity and time costs.

[0041] To resolve the above issues, please refer to Figure 1 and Figure 2 In some embodiments, this application provides a secondary screen 12 for a smart blackboard, which includes a front panel 100, a back panel 200, and a connecting component 300. The back panel 200 and the front panel 100 are stacked together along the thickness direction of the front panel 100, and a support protrusion 210 is formed on the side of the back panel 200 facing the front panel 100, the support protrusion 210 abutting against the front panel 100; the connecting component 300 is disposed on the side of the back panel 200 facing away from the front panel 100, and the connecting component 300 is used to connect to the main screen 11.

[0042] The aforementioned secondary screen 12 can achieve at least the following beneficial effects: This application omits the honeycomb layer in the traditional solution. A support protrusion 210 is integrally formed on the back panel 200 and abuts against the panel 100, thereby providing additional support and stability. This can effectively reduce the pressing noise problem caused by local stress bending, and improve the overall quality of the product and the user experience. This application directly forms the support protrusion 210 integrally on the back panel 200, and the panel 100 and the back panel 200 can be directly stacked and fixed by means of bonding, etc., without the complicated steps of bonding the panel 100 and the back panel 200 separately on both sides of the honeycomb layer as in the traditional secondary screen 12. This reduces the dependence on high-cost materials (such as aluminum honeycomb), reduces the overall material cost, and simplifies the manufacturing and assembly process, reducing time and labor costs.

[0043] Specifically, such as Figure 2 As shown, in some embodiments, the number of support protrusions 210 is set to multiple, and the multiple support protrusions 210 are spaced apart. The multiple support protrusions 210 can be integrally manufactured with the back panel 200 through a single molding process, simplifying the manufacturing process and reducing production complexity and cost. By providing multiple support protrusions 210 on the back panel 200, support can be provided over a larger area, further improving the overall rigidity and stability of the sub-screen 12 and reducing the problem of abnormal noise when pressed. The multiple spaced support protrusions 210 can evenly distribute the stress on the panel 100 to the back panel 200, reducing local stress concentration and thus reducing the risk of deformation and damage to the panel 100.

[0044] Please see Figure 3 , Figure 4 and Figure 5 In some embodiments, a reinforcing rib 220 protrudes from the side of the back panel 200 facing away from the panel 100. The material of the back panel 200 may include, but is not limited to, polycarbonate. The reinforcing rib 220 can be integrally manufactured with the back panel 200 using a molded molding process, simplifying the production process and reducing manufacturing complexity and cost. The reinforcing rib 220 can significantly improve the bending and torsional resistance of the back panel 200, effectively absorb and disperse external impact forces, reduce the risk of deformation and damage to the back panel 200 and panel 100 when subjected to external forces, and improve the durability and reliability of the product.

[0045] Specifically, such as Figure 3As shown, in some embodiments, the reinforcing rib 220 includes a plurality of first reinforcing ribs 221, each of which extends along a first direction D1, and the plurality of first reinforcing ribs 221 are spaced apart along a second direction D2, the second direction D2 being at an angle to the first direction D1. The provision of multiple first reinforcing ribs 221 provides multi-point support, significantly improving the overall rigidity and deformation resistance of the back plate 200. Since the back plate 200 and its first reinforcing ribs 221 are essentially a single unit, this embodiment, by rationally designing the shape, number, and spacing of the first reinforcing ribs 221, can improve the structural strength of the back plate 200 while reducing its overall weight, achieving a lightweight design.

[0046] More specifically, such as Figure 3 As shown, in some embodiments, the reinforcing rib 220 further includes a second reinforcing rib 222, which extends along a second direction D2, and any first reinforcing rib 221 is staggered with the second reinforcing rib 222. The staggered arrangement of the first reinforcing ribs 221 and the second reinforcing ribs 222 can be roughly considered as forming a grid-like structure, which not only provides strong support and significantly improves the overall rigidity and deformation resistance of the back plate 200, but also more evenly distributes the stress on the panel 100 and the back plate 200, reduces local stress concentration, and lowers the risk of deformation and damage.

[0047] More specifically, such as Figure 3 As shown, in some embodiments, multiple second reinforcing ribs 222 are provided, and the multiple second reinforcing ribs 222 are arranged at intervals along the first direction D1, with any first reinforcing rib 221 and any second reinforcing rib 222 being staggered. Providing multiple second reinforcing ribs 222, together with multiple first reinforcing ribs 221, can further significantly improve the overall rigidity and deformation resistance of the back plate 200. Since the back plate 200 and the second reinforcing ribs 222 thereon are essentially integrated, this embodiment, by rationally designing the shape, number, and spacing of the second reinforcing ribs 222, can improve the structural strength of the back plate 200 while reducing the overall weight of the back plate 200, achieving a lightweight design.

[0048] More specifically, such as Figure 3 As shown, in some embodiments, the first direction D1 is perpendicular to the second direction D2. Since the first direction D1 and the second direction D2 are perpendicular, the staggered first reinforcing ribs 221 and second reinforcing ribs 222 form a rectangular or square grid structure. This structure provides strong support in both vertical directions, significantly improving the overall rigidity and deformation resistance of the back plate 200.

[0049] Please see Figure 5 and Figure 6 In some embodiments, the adapter assembly 300 includes an adapter frame 310, fasteners, and a support pad 330. The support pad 330 is sandwiched between the front panel 100 and the back panel 200. The adapter frame 310 is located on the side of the back panel 200 facing away from the support pad 330. The fastener passes through the adapter frame 310 and the back panel 200 to fix it to the support pad 330. Taking a self-tapping screw as an example, since this application omits the honeycomb layer in the traditional secondary screen 12, the self-tapping screw needs to be directly threaded to the back panel 200, which is prone to stripping. This results in unreliable connection between the back panel 200, the fasteners, and the adapter frame 310. That is, the entire adapter assembly 300 is unreliably connected to the back panel 200. Since the secondary screen 12 is connected to the main screen 11 through the adapter assembly 300, if the adapter assembly 300 is unreliable, the secondary screen 12 is prone to shaking or even falling off, causing damage to the secondary screen 12. To this end, a support pad 330 is added in this embodiment. The support pad 330 can be tightly connected with fasteners such as self-tapping screws to avoid stripping of the self-tapping screws and to achieve a reliable connection between the adapter component 300 and the sub-screen 12.

[0050] Specifically, such as Figure 6 As shown, in some embodiments, the support pad 330 is located at the edge of the back plate 200, and the edge of the panel 100 has a flange 110 formed thereon. The flange 110 wraps around the support pad 330 and abuts against the support pad 330 to restrict the movement of the support pad 330. By forming a flange 110 at the edge of the panel 100 and wrapping it around the support pad 330, the movement of the support pad 330 can be effectively restricted, preventing it from shifting due to vibration or external force during use, ensuring that the support pad 330 is always in a predetermined position, thereby improving the stability of the entire structure.

[0051] Specifically, in some embodiments, the support pad 330 is a flexible support pad 330. The material of this flexible support pad 330 may include, but is not limited to, foam. When the fastener is a self-tapping screw, the flexible support pad 330 can prevent the self-tapping screw from stripping. Furthermore, the flexible support pad 330 has good elasticity and cushioning properties, and can also absorb and mitigate external impacts to a certain extent, reducing direct impacts on the panel 100 and the back panel 200.

[0052] Specifically, such as Figure 6 As shown, in some embodiments, the adapter assembly 300 further includes a clamping member 320 connected to the adapter frame 310, the clamping member 320 may include, but is not limited to, quick-release clips.

[0053] Specifically, such as Figure 3As shown, in some embodiments, the number of adapter components 300 is set to multiple, and the multiple adapter components 300 are spaced apart on one side edge of the back plate 200. The multiple adapter components 300 spaced apart on one side edge of the back plate 200 can provide more connection points, evenly distribute the stress acting on the back plate 200, avoid excessive stress on a single connection point, reduce stress concentration, thereby improving the stability and firmness of the overall connection, and preventing the components from loosening or falling off during use.

[0054] Please see Figure 3 and Figure 7 In some embodiments, the sub-screen 12 also includes a baffle 230 integrally formed with the back panel 200, with the baffle 230 and the adapter assembly 300 respectively located on opposite sides of the back panel 200. More specifically, the back panel 200 can be integrally vacuum-formed; in other words, the supporting protrusion 210, the reinforcing rib 220, and the baffle 230 can all be part of the back panel 200. The integral vacuum-forming process of the back panel 200 allows multiple components to be combined into a single unit, eliminating weak points in the connections between components and improving the overall structural strength and durability. This can also be considered as eliminating the need for separate manufacturing and subsequent assembly of multiple materials such as the sheet metal sub-screen baffle, plastic positioning groove, and honeycomb layer in traditional solutions, simplifying the production process and significantly reducing material costs, assembly steps, and time.

[0055] Please see Figure 4 In some embodiments, a positioning recess 240 is formed on one edge of the back panel 200. The positioning recess 240 is used for insertion and positioning with a positioning protrusion on the main screen 11. By forming the positioning recess 240 directly on the back panel 200, the molds and materials required for separately manufacturing the positioning recess 240 can be eliminated, thereby simplifying the manufacturing process and reducing production complexity and cost. In addition, since the positioning recess 240 is integrally formed on the back panel 200, additional assembly steps are avoided, reducing labor and time costs and improving production efficiency.

[0056] In other embodiments, a positioning protrusion is formed on one edge of the back panel 200, which is used to engage and limit the positioning of the protrusion with a positioning recess on the main screen 11. By forming the positioning protrusion directly on the back panel 200, the molds and materials required for separately manufacturing the positioning protrusion can be eliminated, thereby simplifying the manufacturing process and reducing production complexity and cost. In addition, the positioning protrusion is integrally formed on the back panel 200, which also avoids additional assembly steps, reduces labor and time costs, and improves production efficiency.

[0057] In addition, such as Figure 8 As shown, this application also provides a smart blackboard 10, which includes a main screen 11 and a secondary screen 12 as described in any of the above embodiments.

[0058] The aforementioned smart blackboard 10, because it includes the sub-screen 12 of any of the above embodiments, also has at least the following beneficial effects: the sub-screen 12 of the smart blackboard 10 omits the honeycomb layer in the traditional solution, and the back panel 200 is integrally formed with a support protrusion 210 that abuts against the panel 100, thereby providing additional support and stability. This can effectively reduce the problem of abnormal noise caused by local stress bending, and improve the overall quality of the product and the user experience. This application directly forms the support protrusion 210 integrally on the back panel 200, which can directly stack and fix the panel 100 and the back panel 200 by means of bonding, etc., without the complicated steps of bonding the panel 100 and the back panel 200 to both sides of the honeycomb layer as in the traditional sub-screen 12. This reduces the dependence on high-cost materials (such as aluminum honeycomb), reduces the overall material cost, and simplifies the manufacturing and assembly process, reducing time and labor costs.

[0059] 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.

[0060] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of this 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.

[0061] In the description of this application, it should be understood that the terms "axial", "radial", "circumferential", "length", "width", "thickness", "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., 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.

[0062] Furthermore, the terms "first" and "second" are used 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 as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0063] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through 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. "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.

[0064] 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 according to the specific circumstances.

[0065] It should be noted that when an element is referred to as being "attached to," "fixed to," or "set on" another element, it can be directly on the other element or there may be an intervening element. When 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. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0066] In the description of this specification, references to terms such as "an embodiment," "another implementation," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative descriptions of the above terms do not necessarily refer to the same embodiment or example. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of this application.

Claims

1. A secondary screen (12) for a smart blackboard, characterized in that, include: Panel (100); A back panel (200) is stacked with the front panel (100) along the thickness direction of the front panel (100), and a support protrusion (210) is formed on the side of the back panel (200) facing the front panel (100), and the support protrusion (210) abuts against the front panel (100). as well as A connector (300) is provided on the side of the back panel (200) facing away from the front panel (100), and the connector (300) is used to connect to the main screen (11).

2. The secondary screen (12) of the smart blackboard according to claim 1, characterized in that, The number of the support protrusions (210) is set to multiple, and the multiple support protrusions (210) are distributed at intervals.

3. The secondary screen (12) of the smart blackboard according to claim 1, characterized in that, The back plate (200) has a reinforcing rib (220) protruding from the side opposite to the front panel (100).

4. The secondary screen (12) of the smart blackboard according to claim 3, characterized in that, The reinforcing rib (220) includes a plurality of first reinforcing ribs (221), each of the first reinforcing ribs (221) extending along a first direction (D1), and the plurality of first reinforcing ribs (221) are arranged at intervals along a second direction (D2), the second direction (D2) being at an angle to the first direction (D1).

5. The secondary screen (12) of the smart blackboard according to claim 4, characterized in that, The reinforcing rib (220) further includes a second reinforcing rib (222), which extends along a second direction (D2), and any one of the first reinforcing ribs (221) and the second reinforcing rib (222) are staggered.

6. The secondary screen (12) of the smart blackboard according to claim 5, characterized in that, The number of the second reinforcing ribs (222) is multiple, and the multiple second reinforcing ribs (222) are arranged at intervals along the first direction (D1), and any first reinforcing rib (221) and any second reinforcing rib (222) are staggered; And / or, the first direction (D1) is perpendicular to the second direction (D2).

7. The secondary screen (12) of the smart blackboard according to claim 1, characterized in that, The adapter assembly (300) includes an adapter frame (310), fasteners, and a support pad (330). The support pad (330) is sandwiched between the front panel (100) and the back panel (200). The adapter frame (310) is located on the side of the back panel (200) facing away from the support pad (330). The fasteners pass through the adapter frame (310) and the back panel (200) to fix them to the support pad (330).

8. The secondary screen (12) of the smart blackboard according to claim 7, characterized in that, The support pad (330) is located at the edge of the back plate (200), and the edge of the panel (100) is formed with a flange (110), which wraps around the support pad (330) and abuts against the support pad (330) to restrict the movement of the support pad (330); And / or, the fastener is a self-tapping screw; And / or, the support pad (330) is a flexible support pad (330). And / or, the adapter assembly (300) further includes a clamp (320) connected to the adapter frame (310). And / or, the number of the adapter components (300) is set to a plurality, and the plurality of the adapter components (300) are spaced apart on one side edge of the back plate (200).

9. The secondary screen (12) of the smart blackboard according to any one of claims 1 to 8, characterized in that, The sub-screen (12) also includes a baffle (230) integrally formed with the back panel (200), and the baffle (230) and the adapter assembly (300) are respectively disposed on two opposite edges of the back panel (200); And / or, the back panel (200) is integrally thermoformed.

10. The secondary screen (12) of the smart blackboard according to any one of claims 1 to 8, characterized in that, A positioning recess (240) is formed on one side edge of the back plate (200), and the positioning recess (240) is used to insert and limit the positioning protrusion on the main screen (11); Alternatively, a positioning protrusion is formed on one side edge of the back panel (200), which is used to insert and limit the positioning of the positioning recess (240) on the main screen (11).

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