Infrared touch screen frame structure, infrared touch screen and intelligent blackboard

Abstract

The embodiment of the utility model discloses an infrared touch screen frame structure, an infrared touch screen and an intelligent blackboard, the infrared touch screen frame structure comprises an upper frame, a lower frame, two side frames, corner connectors and wrap angles, and the upper frame, the lower frame and the side frames are spliced through the corner connectors; each of the upper frame, the lower frame and the two side frames comprises a first slot position for fixing the infrared circuit board and a second slot position for mounting the corner connector, the first slot position is perpendicular to the horizontal plane, the second slot position is parallel to the horizontal plane, and the corner connector is mounted above the first slot position; the wrap angle is arranged on the outer side of the corner brace in a sleeving mode and comprises a first structural layer and a second structural layer which are parallel to the horizontal plane and arranged in a stacked mode, and the corner brace is inserted and fixed between the first structural layer and the second structural layer. The second structure layer comprises a first retaining wall part and a second retaining wall part which are formed by bending downwards, the first retaining wall part is arranged corresponding to the first slot position of the side frame, and the second retaining wall part is arranged corresponding to the first slot position of the upper frame or the lower frame, so that the infrared circuit board can be limited, and disassembly and maintenance are convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of infrared touch display equipment, and more specifically, to an infrared touch screen frame structure, an infrared touch screen and a smart blackboard. Background Art

[0002] With the increasing popularity and attention paid to electronic intelligent products, the education industry is also undergoing in-depth technological changes. Under the influence of the trend of intelligent teaching tools, smart blackboards have been popularized in most teaching environments and gradually emerged. In the design, production and use of smart blackboards, a large-sized touch display device is generally used as the main screen, and two writing boards are set on both sides of the main screen as secondary screens. Large-sized touch display devices generally include capacitive touch screens and infrared touch screens.

[0003] For infrared touch products, the frame structure is not only the outer frame of the product, but also the bearing component of the infrared circuit board. During the use and transportation of infrared touch products, if the infrared circuit board is misaligned or shaken, it will affect the infrared touch effect of the product, so the infrared circuit board needs to be fixed and limited.

[0004] In conventional designs, the infrared circuit board is limited by the infrared limit block installed on the corner bracket, and the corner bracket only serves as a decoration. However, if the infrared circuit board of such a structural product needs to be repaired, the rear cover, four frames and corner brackets of the product can only be completely removed to remove the infrared circuit board, which has the disadvantages of poor maintainability and high maintenance costs. In addition, the corner brackets made by aluminum extrusion and die-casting processes need to take into account the function of limiting the infrared circuit board, so their own structural design is complex, the production and processing costs are high, and the economic benefits are low. Utility Model Content

[0005] In view of the above problems, one object of the present invention is to provide an infrared touch screen frame structure which can effectively limit the position of the infrared circuit board and is convenient for disassembly and maintenance.

[0006] Another object of the present invention is to provide an infrared touch screen including the above infrared touch screen frame structure.

[0007] Another object of the present invention is to provide a smart blackboard including the above-mentioned infrared touch screen.

[0008] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0009] According to one aspect of the utility model, there is provided an infrared touch screen frame structure, comprising:

[0010] An upper frame, a lower frame, two side frames located between the upper frame and the lower frame, corner brackets, and corner wraps, wherein the upper frame, the lower frame, and the two side frames are spliced ​​and enclosed by the corner brackets to form a frame structure;

[0011] The upper frame, the lower frame and the two side frames all include a first installation cavity and a second installation cavity, the first installation cavity is provided with a first slot for fixing the infrared circuit board, the second installation cavity is provided with a second slot for installing the angle code, the first slot is arranged perpendicular to the horizontal plane, the second slot is arranged parallel to the horizontal plane, and the angle code is arranged above the first slot;

[0012] The corner wrap is sleeved on the outside of the angle code, the corner wrap comprises a first structural layer and a second structural layer stacked parallel to a horizontal plane, and the angle code is inserted and fixed between the first structural layer and the second structural layer;

[0013] The second structural layer is located below the first structural layer, and the second structural layer includes a first retaining wall portion and a second retaining wall portion that are bent downward, the first retaining wall portion is arranged corresponding to the first slot of the side frame, and the first retaining wall portion abuts against the end of the side frame, the second retaining wall portion is arranged corresponding to the first slot of the upper frame or the lower frame, and the second retaining wall portion abuts against the end of the upper frame or the lower frame.

[0014] In addition, an optional solution is that the corner bracket includes an L-shaped corner portion, a first mounting portion formed by extending one end of the corner portion along the length direction of the side frame, and a second mounting portion formed by extending the other end of the corner portion along the length direction of the upper frame or the lower frame, and the first mounting portion and the second mounting portion are perpendicular to each other;

[0015] The corner portion is plugged and fixed between the first structural layer and the second structural layer, the first mounting portion is plugged and fixed to the second slot of the side frame, and the second mounting portion is plugged and fixed to the second slot of the upper frame or the lower frame.

[0016] In addition, an optional solution is that a side of the corner portion close to the first mounting portion includes a first stopper protruding toward the inside of the frame structure, and the first stopper abuts against an end of the side frame;

[0017] A side of the corner portion close to the second mounting portion includes a second stopper protruding toward the inside of the frame structure, and the second stopper abuts against an end of the upper frame or the lower frame.

[0018] In addition, an optional solution is that a clamping portion is included between the first structural layer and the second structural layer, the clamping portion is arranged perpendicular to the horizontal plane, and two ends of the clamping portion are respectively combined and fixed to the surfaces of one side of the first structural layer and the second structural layer close to each other;

[0019] The outer edge of the corner portion includes a groove that is recessed toward the inner side of the frame structure, and the groove and the clamping portion are correspondingly matched.

[0020] In addition, an optional solution is that the wrap angle is L-shaped, including a first end abutting against the end of the side frame, and a second end abutting against the end of the upper frame or the lower frame;

[0021] The second end of the wrap angle comprises a limiting portion extending along the length direction of the lower frame, the clamping portion and the limiting portion are arranged in parallel, and the clamping portion is located at a portion of the wrap angle close to the first end;

[0022] The second installation cavity of the upper frame and the lower frame includes a limiting card slot corresponding to the limiting portion, the limiting card slot is located below the second slot, and the limiting portion is embedded in the limiting card slot.

[0023] In addition, an optional solution is that the wrap angle is L-shaped, including a first end abutting against the end of the side frame, and a second end abutting against the end of the upper frame or the lower frame;

[0024] The first end of the wrap angle includes a limiting portion extending along the length direction of the side frame, the clamping portion and the limiting portion are arranged in parallel, and the clamping portion is located at the portion close to the second end;

[0025] The second installation cavity of the side frame includes a limiting card slot corresponding to the limiting portion, the limiting card slot is located below the second slot, and the limiting portion is embedded in the limiting card slot.

[0026] In addition, an optional solution is that the second installation cavity of the lower frame includes a first support rib and a second support rib that are arranged opposite to each other, the first support rib and the second support rib are arranged parallel to the horizontal plane, the first support rib is located on the side wall of the second installation cavity away from the interior of the frame structure, and the first support rib, the second support rib and the top wall of the lower frame are enclosed to form the second slot;

[0027] The second installation cavity of the lower frame also includes a third support rib arranged parallel to the first support rib. The third support rib is located on a side of the first support rib away from the top wall of the lower frame. A limiting slot is formed between the first support rib and the third support rib.

[0028] In addition, an optional solution is that the upper frame and the two side frames have the same structure, the angle code includes two first angle codes and two second angle codes, and the wrap angle includes a first wrap angle and a second wrap angle corresponding to the first angle code and the second angle code respectively; wherein

[0029] One end of the side frame is detachably connected to the upper frame via the first corner bracket, and the other end of the side frame is detachably connected to the lower frame via the second corner bracket;

[0030] The first wrap angle is correspondingly sleeved on the outer side of the first angle code, and the second wrap angle is correspondingly sleeved on the outer side of the second angle code.

[0031] In addition, an optional solution is that a third slot for fixing the filter strip is provided in the first installation cavity, and the third slot is located on a side of the first slot close to the inside of the frame structure;

[0032] The two opposite groove walls of the third groove are provided with mutually offset mounting grooves, the heating side of the filter strip is embedded in the mounting groove, and the filter strip is arranged obliquely.

[0033] In addition, an optional solution is that the width of the lower frame is greater than the width of the upper frame, and the second installation cavity of the lower frame includes a mainboard mounting rib, and the mainboard mounting rib is located below the second slot and is arranged parallel to the horizontal plane.

[0034] According to another aspect of the utility model, an infrared touch screen is provided, comprising an infrared touch screen frame structure, wherein a filter strip and an infrared circuit board are mounted on the infrared touch screen frame structure.

[0035] According to another aspect of the utility model, a smart blackboard is provided, comprising an infrared touch screen, wherein at least one of the two sides of the infrared touch screen is provided with a writing board.

[0036] The beneficial effects of the utility model are as follows:

[0037] In view of the technical problems existing in the prior art, an infrared touch screen frame structure, an infrared touch screen and a smart blackboard are provided. The corner codes and the corner wraps are innovatively designed to simplify the structure of the corner codes, and a first retaining wall portion and a second retaining wall portion are designed on the corner wraps to limit the infrared circuit board. When the infrared circuit board needs to be repaired, only the corner wraps need to be removed to take out the infrared circuit board, which reduces the difficulty of disassembly during maintenance, facilitates disassembly and maintenance, reduces maintenance costs, and improves maintenance efficiency. The corner codes do not need to assume the limiting function of the infrared circuit board, have a simple structure, reduce production costs, and improve the standardization rate of design and assembly efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] The specific implementation of the utility model is further described in detail below with reference to the accompanying drawings.

[0039] Figure 1 A structural schematic diagram of an infrared touch frame structure provided by an embodiment of the utility model is shown.

[0040] Figure 2 Show Figure 1 Schematic diagram of the cross section at AA in the middle.

[0041] Figure 3 Show Figure 1 Schematic diagram of the cross section at BB.

[0042] Figure 4 A schematic diagram showing the connection between the lower frame and the side frame provided by an embodiment of the utility model is shown.

[0043] Figure 5 A schematic diagram showing the connection between the upper frame and the side frame provided in an embodiment of the utility model is shown.

[0044] Figure 6 A side view of the lower frame provided by an embodiment of the utility model is shown.

[0045] Figure 7 A side view of a side frame provided by an embodiment of the utility model is shown.

[0046] Figure 8 A schematic structural diagram of a first angle code provided in an embodiment of the utility model is shown.

[0047] Fig. 9 A schematic structural diagram of a second angle code provided in an embodiment of the utility model is shown.

[0048] Fig.10 A schematic structural diagram of a first wrap angle provided by an embodiment of the utility model is shown.

[0049] Fig.11 A schematic structural diagram of a second wrap angle provided by an embodiment of the utility model is shown.

[0050] Fig.12 A connection diagram of the first angle code and the first wrap angle provided in an embodiment of the utility model is shown.

[0051] Fig.13 A connection diagram of the second angle code and the second wrap angle provided in an embodiment of the utility model is shown.

[0052] Fig.14 A schematic diagram showing the connection between the first wrap angle, the upper frame and the side frame provided in an embodiment of the utility model is shown.

[0053] Fig.15 A schematic diagram showing the connection between the second corner wrapping, the lower frame, and the side frame provided in an embodiment of the utility model is shown.

[0054] Fig.16 A schematic diagram of the structure of the connection between the lower frame and the side frame when the second corner wrap is not removed is shown.

[0055] Fig.17 A schematic diagram of the structure of the connection between the lower frame and the side frame when the second corner wrap is removed is shown. DETAILED DESCRIPTION

[0056] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only the parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0057] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0058] In the present invention, unless otherwise clearly stipulated and limited, the first feature being "on" or "below" the second feature may include the first and second features being in direct contact, or may include the first and second features not being in direct contact but being in contact through another feature between them.

[0059] In the description of this embodiment, the terms "upper", "lower", "left", "right" and other directions or positional relationships are based on the directions or positional relationships shown in the drawings, and are only for the convenience of description and simplified operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0060] For infrared touch products, the frame structure is not only the outer frame of the product, but also the bearing component of the infrared circuit board. During the use and transportation of infrared touch products, if the infrared circuit board is misaligned or shaken, it will affect the infrared touch effect of the product, so the infrared circuit board needs to be fixed and limited.

[0061] In conventional designs, the infrared circuit board is limited by the infrared limit block installed on the corner bracket, and the corner bracket only serves as a decoration. However, if the infrared circuit board of such a structural product needs to be repaired, the rear cover, four frames and corner brackets of the product can only be completely removed to remove the infrared circuit board, which has the disadvantages of poor maintainability and high maintenance costs. In addition, the corner brackets made by aluminum extrusion and die-casting processes need to take into account the function of limiting the infrared circuit board, so their own structural design is complex, the production and processing costs are high, and the economic benefits are low.

[0062] In view of the defects of the prior art, the present invention provides an infrared touch screen frame structure, Figure 1-17 As shown, the frame structure of the infrared touch screen includes an upper frame 1, a lower frame 2, two side frames 3, corner brackets and corner wraps. The two side frames 3 are located between the upper frame 1 and the lower frame 2, and the two side frames 3 and the upper and lower frames are connected and fixed by the corner brackets to form a frame structure.

[0063] The upper frame 1, the lower frame 2 and the two side frames 3 all include a first installation cavity and a second installation cavity. The first installation cavity is provided with a first slot for fixing the infrared circuit board, and the second installation cavity is provided with a second slot for installing the angle code. The first slot is arranged perpendicular to the horizontal plane, and the second slot is arranged parallel to the horizontal plane. The angle code is arranged above the first slot.

[0064] The corner wrap is sleeved on the outside of the angle code, and the corner wrap includes a first structural layer 501 and a second structural layer 502 stacked and arranged parallel to the horizontal plane, and the angle code is inserted and fixed between the first structural layer 501 and the second structural layer 502.

[0065] The second structural layer 502 is located below the first structural layer 501, and the second structural layer 502 includes a first retaining wall portion 503 and a second retaining wall portion 504 that are bent downward, the first retaining wall portion 503 is arranged corresponding to the first slot of the side frame 3, the first retaining wall portion 503 abuts against the end of the side frame 3, the second retaining wall portion 504 is arranged corresponding to the first slot of the upper frame 1 or the lower frame 2, and the second retaining wall portion 504 abuts against the end of the upper frame or the lower frame.

[0066] In a specific embodiment, the upper frame 1 and the two side frames 3 have the same structure, and only one set of molds is required during production, which can save development costs, reduce production costs, and improve economic benefits. Figure 3 and Figure 7As shown, the side frame 3 includes a first side frame installation cavity 31 and a second side frame installation cavity 32 which are arranged in the upper and lower parts. A first side frame slot 33 for fixing the infrared circuit board 6 is provided in the first side frame installation cavity 31, and a second side frame slot 34 for installing the angle code is provided in the second side frame installation cavity 32. The first side frame slot 33 is arranged perpendicular to the horizontal plane, the second side frame slot 34 is arranged parallel to the horizontal plane, the second side frame slot 34 is arranged above the first side frame slot 33, and the angle code is installed in the second side frame slot 34, so that the angle code is located above the infrared circuit board 6. When the infrared circuit board is inspected and repaired, the infrared circuit board 6 can be disassembled without removing the angle code.

[0067] In one embodiment, the product mainboard is installed in the lower frame 2, and the width of the lower frame 2 is greater than the width of the upper frame 1. The lower frame 2 is processed by aluminum extrusion technology. Figure 2 and Figure 6 As shown, the lower frame 2 includes a lower frame first installation cavity 21 and a lower frame second installation cavity 22 arranged on the left and right, a lower frame first slot 23 for fixing the infrared circuit board 6 is provided in the lower frame first installation cavity 21, and a lower frame second slot 24 for installing the angle code is provided in the lower frame second installation cavity 22. The lower frame first slot 23 is arranged perpendicular to the horizontal plane, the lower frame second slot 24 is arranged parallel to the horizontal plane, the lower frame second slot 24 is arranged above the lower frame first slot 23, and the angle code is installed in the lower frame second slot 24, so that the angle code is located above the infrared circuit board 6, and when the infrared circuit board is inspected and repaired, the infrared circuit board 6 can be disassembled without removing the angle code.

[0068] In a specific embodiment, the second mounting cavity 22 of the lower frame also includes a mainboard mounting rib 25, which is used to support and fix the mainboard of the product. The mainboard mounting rib 25 is located below the second slot 24 of the lower frame and is arranged parallel to the horizontal plane. Furthermore, the bottom of the second mounting cavity 22 of the lower frame also includes a magnetic iron sheet 26, which is attached to the bottom of the second mounting cavity 22 of the lower frame through adhesive, and is used to absorb the writing pen.

[0069] In this embodiment, combined with Figure 2-3 and Figure 6-7 As shown, the third slot of the filter strip 7 is fixed in the first mounting cavity of the upper frame 1, the lower frame 2 and the side frame 3, and the third slot is located on the side of the first slot close to the inside of the frame structure. The two opposite slot walls of the third slot are provided with mounting slots 70 arranged in a mutually staggered manner, and the heating side edge of the filter strip 7 is clamped in the mounting slot 70. The filter strip 7 is arranged to be inclined, and the angle α between it and the horizontal plane is 78°.

[0070] In one embodiment, a disassembly gap is included between the filter strip 7 and the infrared circuit board 6. In the upper frame 1 and the side frame 3, the maximum distance L between the installation position of the infrared circuit board 6 and the installation position of the filter strip 7 is 1 In the lower frame 2, the maximum distance L between the installation position of the infrared circuit board 6 and the installation position of the filter strip 7 is 2 It is 19.8mm.

[0071] In one embodiment, upper and lower limit grooves are provided on two opposite groove walls of the first groove, and the side edges of the infrared circuit board 6 are embedded in the limit grooves, and the upper and lower limit grooves are used for limiting to ensure the installation accuracy of the infrared circuit board.

[0072] In a specific embodiment, the corner code includes a first corner code 41 and a second corner code 42, one end of the two side frames 3 is installed on two opposite sides of the upper frame 1 through the two first corner codes 41, and the other end is installed on two opposite sides of the lower frame 2 through the two second corner codes 42. Correspondingly, the corner wrapping includes a first corner wrapping 51 and a second corner wrapping 52, the first corner wrapping 51 corresponds to the first corner code 41, is sleeved on the outside of the first corner code 41, and its two ends are respectively abutted against the upper frame 1 and the side frame 3; the second corner wrapping 52 corresponds to the second corner code 42, is sleeved on the outside of the second corner code 42, and its two ends are respectively abutted against the lower frame 2 and the side frame 3.

[0073] In this embodiment, the wrap angle is injection molded. Fig.10 and Fig.14 As shown, the first retaining wall portion 503 is formed by extending downward from one end of the second structural layer 502 close to the side frame 3, and is arranged corresponding to the first slot 33 of the side frame, and is used to limit the infrared circuit board 6 installed in the side frame 3 to prevent the infrared circuit board 6 from shaking or shifting during use or transportation; the second retaining wall portion 504 is formed by extending downward from one end of the second structural layer 502 close to the upper frame 1, and is arranged corresponding to the first slot of the upper frame 1, and is used to limit the infrared circuit board 6 installed in the upper frame 1 to prevent the infrared circuit board 6 from shaking or shifting during use or transportation.

[0074] For the second wrap angle 52, if Fig.11 and Fig.15As shown, the first retaining wall portion 503 is formed by extending downward from one end of the second structural layer 502 close to the side frame 3, and is arranged corresponding to the first slot 33 of the side frame, and is used to limit the infrared circuit board 6 installed in the side frame 3 to prevent the infrared circuit board 6 from shaking or shifting during use or transportation; the second retaining wall portion 504 is formed by the inner side edge of the part of the second structural layer 502 arranged along the length direction of the side frame 3, extending toward the direction close to the lower frame 2 and bending downward, and is arranged corresponding to the first slot 23 of the lower frame, and is used to limit the infrared circuit board 6 installed in the lower frame 2 to prevent the infrared circuit board 6 from shaking or shifting during use or transportation.

[0075] In this embodiment, if Figure 8 and Fig. 9 As shown, the structures of the first corner code 41 and the second corner code 42 are substantially the same, and the only difference is that, since the width of the lower frame 2 is greater than the width of the upper frame 1, the width of the connecting portion between the second corner code 42 and the lower frame 2 is greater than the width of the connecting portion between the first corner code 41 and the upper frame 1. Specifically, the corner code includes an L-shaped corner portion 401, a first mounting portion 402 formed by extending one end of the corner portion 401 along the length direction of the side frame 3, and a second mounting portion 403 formed by extending the other end of the corner portion 401 along the length direction of the upper frame 1 or the lower frame 2, wherein the first mounting portion 402 and the second mounting portion 403 are perpendicular to each other.

[0076] In this embodiment, the corner portion 401 is inserted and fixed between the first structural layer and the second structural layer of the corner, the first mounting portion 402 is inserted and fixed to the second slot 34 of the side frame, the second mounting portion 403 of the first angle code 41 is inserted and fixed to the second slot of the upper frame 1, and the second mounting portion 403 of the second angle code 42 is inserted and fixed to the second slot 24 of the lower frame. Since the width of the lower frame 2 is greater than the width of the upper frame 1, the width of the second mounting portion 403 of the second angle code 42 is greater than the width of the second mounting portion 403 of the first angle code 41.

[0077] Furthermore, in order to achieve a fixed connection between the corner bracket and the four frames, threaded holes 404 are provided on the first mounting portion 402 and the second mounting portion 403, and mounting holes are correspondingly provided at the connecting portions of the four frames and the corner bracket. The mounting holes and the threaded holes 404 are connected by screws or bolts to achieve the installation and fixation of the corner bracket, thereby achieving the splicing and fixation of the four frames to form a rectangular frame structure.

[0078] In one embodiment, the corner bracket also includes a stopper structure when installed with the frame. Specifically, the side of the corner portion 401 close to the first mounting portion 402 includes a first stopper 405 formed by protruding into the interior of the frame structure, and the first stopper 405 abuts against the end of the side frame 3 to ensure that the corner bracket is installed in place; the side of the corner portion 401 close to the second mounting portion 403 includes a second stopper 406 formed by protruding into the interior of the frame structure, and the second stopper 406 of the first corner bracket 41 abuts against the end of the upper frame 1, and the second stopper 406 of the second corner bracket 41 abuts against the end of the lower frame 2 to ensure that the corner bracket is installed in place.

[0079] In this embodiment, since the angle code is a metal piece, the first stopper 405 and the first mounting portion 402 and the second stopper 406 and the second mounting portion 403 are right angle corners, and the dimensional accuracy is difficult to ensure during the processing. To ensure the dimensional accuracy, further, such as Figure 4-5 As shown, arc corner transitions are designed between the first stop portion 405 and the first mounting portion 402 and between the second stop portion 406 and the second mounting portion 403 so that the arc corners abut against the ends of the frame, thereby ensuring that the corner code can be installed in place.

[0080] In one embodiment, the end of the corner code includes an oblique chamfer 408, and the oblique chamfer 408 has a guiding effect for the assembly of the corresponding corner code.

[0081] In a specific embodiment, Figure 12-13 As shown, a clamping part 505 is arranged between the first structural layer 501 and the second structural layer 502 of the corner, and the clamping part 505 is arranged perpendicular to the horizontal plane. The two ends of the clamping part 505 are respectively fixed to the surfaces of one side of the first structural layer 501 and the second structural layer 502 close to each other. The outer edge of the corner portion 401 of the corner code includes a groove 407 formed by being recessed in the direction close to the inside of the frame structure. The groove 407 and the clamping part 505 are arranged in a corresponding manner, and the clamping part 505 is inserted into the groove 407 to ensure the position accuracy of the corner.

[0082] In one embodiment, the first angle code includes two slots 407, and the two slots 407 are respectively located at one end of the corner portion 401 close to the first mounting portion 402 and one end of the corner portion 401 close to the second mounting portion 403. During assembly, one of the two slots 407 can be selected for assembly according to the position of the corner clamping portion 505, making assembly more convenient without distinguishing the front and back and left and right of the first angle code, thereby improving assembly efficiency.

[0083] In a specific embodiment, the wrap angle is L-shaped, including a first end 506 abutting against the end of the side frame 3, and a second end 507 abutting against the end of the upper frame 1 or the lower frame 2. Figure 10-11As shown, the second end 507 of the wrap angle includes a limiting portion 508 extending along the length direction of the lower frame 2, the clamping portion 505 and the limiting portion 508 are arranged in parallel, the clamping portion 505 is located at the portion of the wrap angle close to the first end 506, and the clamping portion 505 and the limiting portion 508 do not interfere with each other when the wrap angle is installed. Correspondingly, the second installation cavity of the upper frame 1 and the lower frame 2 includes a limiting card slot 26 corresponding to the limiting portion 508, the limiting card slot 26 is located below the second slot, and the limiting portion 508 is embedded in the limiting card slot 26 to achieve the assembly between the wrap angle and the upper and lower frames, and perform structural limitation.

[0084] In the lower border 2, such as Figure 6 As shown, the second mounting cavity 22 of the lower frame includes a first supporting rib 27 and a second supporting rib 28 which are arranged opposite to each other. The first supporting rib 27 and the second supporting rib 28 are arranged flush and parallel to the horizontal plane. The first supporting rib 27 is located on the inner side of the outer wall of the lower frame 2, that is, on the side wall of the second mounting cavity 22 of the lower frame away from the interior of the frame structure. The first supporting rib 27, the second supporting rib 28 and the top wall of the lower frame 2 are enclosed to form the second slot 24 of the lower frame. The second mounting cavity 22 of the lower frame also includes a third supporting rib 29 which is arranged parallel to the first supporting rib 27. The third supporting rib 29 is located below the first supporting rib 27. A limiting slot 26 is formed between the first supporting rib 27 and the third supporting rib 29. The upper and lower ends of the limiting portion 508 are respectively in contact with the first supporting rib 27 and the third supporting rib 29.

[0085] In another embodiment, the first end 506 of the corner includes a limiting portion 508 extending along the length direction of the side frame 3, the clamping portion 505 and the limiting portion 508 are arranged in parallel, the clamping portion 505 is located at the portion of the corner near the second end 507, and the clamping portion 505 and the limiting portion 508 do not interfere with each other when the corner is installed. Correspondingly, the second installation cavity 32 of the side frame includes a limiting card slot 26 corresponding to the limiting portion 508, the limiting card slot 26 is located below the second slot 35 of the side frame, and the limiting portion 508 is embedded in the limiting card slot 26 to achieve assembly between the corner and the side frame and perform structural limitation.

[0086] In the upper frame 1 and the side frame 3, as shown in FIG. Figure 3 and Figure 7 As shown, the second installation cavity includes two parts: a second slot and a limiting slot, and the second slot and the limiting slot are arranged up and down.

[0087] It should be noted that, in actual production, only one of the above two implementations can be selected, that is, the limiting portion 508 is set at the first end 506 or the second end 507 of the wrap angle, but not at both ends.

[0088] In a specific embodiment, a threaded mounting hole 509 is provided at the corner of the corner wrap, and a threaded hole is also provided at a corresponding position on the angle code. The threaded mounting hole 509 and the threaded hole on the angle code are connected by screws to achieve installation and fixation of the corner wrap and the angle code.

[0089] After the infrared touch screen frame structure provided in the embodiment of the utility model is assembled, Figure 16-17 As shown, if the infrared circuit board needs to be repaired, it is only necessary to remove the screws in the threaded mounting hole 509 to remove the corner wrap. After removing the corner wrap, the limit on the infrared circuit board 6 can be released, and the infrared circuit board 6 can be taken out from the first slot for inspection or repair, etc., avoiding the overall removal of the frame structure and improving the inspection efficiency.

[0090] Another embodiment of the utility model provides an infrared touch screen, which includes the above-mentioned infrared touch screen frame structure, wherein the upper frame 1, the lower frame 2 and the side frame 3 of the frame structure are provided with a filter strip 7 and an infrared circuit board 6. The infrared circuit board 6 is installed in the first slot of the frame, and the filter strip 7 is installed in the third slot of the frame, and it is not necessary to use glue, adhesive or the like to fix them. The corner design of the frame structure has a limited structure, which can effectively prevent the infrared circuit board from shaking and shifting.

[0091] Another embodiment of the utility model provides a smart blackboard, which includes an infrared touch screen. A writing board is provided on one side of the infrared touch screen. The writing board is arranged on at least one side of the infrared touch screen.

[0092] The infrared touch screen frame structure, infrared touch screen and smart blackboard provided by the embodiments of the utility model simplify the structure of the corner code through innovative design of the corner code and the corner wrap, and design the first retaining wall part and the second retaining wall part on the corner wrap to play the function of limiting the infrared circuit board. When the infrared circuit board needs to be repaired, it is only necessary to remove the corner wrap to take out the infrared circuit board, which reduces the difficulty of disassembly during maintenance, facilitates disassembly and maintenance, reduces maintenance costs, and improves maintenance efficiency. The corner code does not need to bear the limiting function of the infrared circuit board, has a simple structure, reduces production costs, and improves the standardization rate of design and assembly efficiency.

[0093] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not limitations on the implementation methods of the present invention. For ordinary technicians in the relevant field, other different forms of changes or modifications can be made based on the above description. It is impossible to list all the implementation methods here. All obvious changes or modifications derived from the technical solution of the present invention are still within the scope of protection of the present invention.

Claims

1. An infrared touch screen frame structure, characterized in that: include: An upper frame, a lower frame, two side frames located between the upper frame and the lower frame, corner brackets, and corner wraps, wherein the upper frame, the lower frame, and the two side frames are spliced ​​and enclosed by the corner brackets to form a frame structure; The upper frame, the lower frame and the two side frames all include a first installation cavity and a second installation cavity, the first installation cavity is provided with a first slot for fixing the infrared circuit board, the second installation cavity is provided with a second slot for installing the angle code, the first slot is arranged perpendicular to the horizontal plane, the second slot is arranged parallel to the horizontal plane, and the angle code is arranged above the first slot; The corner wrap is sleeved on the outside of the angle code, the corner wrap comprises a first structural layer and a second structural layer stacked parallel to a horizontal plane, and the angle code is inserted and fixed between the first structural layer and the second structural layer; The second structural layer is located below the first structural layer, and the second structural layer includes a first retaining wall portion and a second retaining wall portion that are bent downward, the first retaining wall portion is arranged corresponding to the first slot of the side frame, and the first retaining wall portion abuts against the end of the side frame, the second retaining wall portion is arranged corresponding to the first slot of the upper frame or the lower frame, and the second retaining wall portion abuts against the end of the upper frame or the lower frame.

2. The infrared touch screen frame structure according to claim 1, characterized in that: The corner bracket includes an L-shaped corner portion, a first mounting portion formed by extending one end of the corner portion along the length direction of the side frame, and a second mounting portion formed by extending the other end of the corner portion along the length direction of the upper frame or the lower frame, wherein the first mounting portion and the second mounting portion are perpendicular to each other; The corner portion is plugged and fixed between the first structural layer and the second structural layer, the first mounting portion is plugged and fixed to the second slot of the side frame, and the second mounting portion is plugged and fixed to the second slot of the upper frame or the lower frame.

3. The infrared touch screen frame structure according to claim 2, characterized in that: The side of the corner portion close to the first mounting portion includes a first stopper protruding toward the inside of the frame structure, and the first stopper abuts against the end of the side frame; A side of the corner portion close to the second mounting portion includes a second stopper protruding toward the inside of the frame structure, and the second stopper abuts against an end of the upper frame or the lower frame.

4. The infrared touch screen frame structure according to claim 2, characterized in that: A clamping portion is provided between the first structural layer and the second structural layer, the clamping portion is arranged perpendicular to the horizontal plane, and two ends of the clamping portion are respectively combined and fixed with one side surface of the first structural layer and the second structural layer close to each other; The outer edge of the corner portion includes a groove that is recessed toward the inner side of the frame structure, and the groove and the clamping portion are correspondingly matched.

5. The infrared touch screen frame structure according to claim 4, characterized in that: The wrap angle is L-shaped, including a first end abutting against an end of the side frame, and a second end abutting against an end of the upper frame or the lower frame; The second end of the wrap angle comprises a limiting portion extending along the length direction of the lower frame, the clamping portion and the limiting portion are arranged in parallel, and the clamping portion is located at a portion of the wrap angle close to the first end; The second installation cavity of the upper frame and the lower frame includes a limiting card slot corresponding to the limiting portion, the limiting card slot is located below the second slot, and the limiting portion is embedded in the limiting card slot.

6. The infrared touch screen frame structure according to claim 4, characterized in that: The wrap angle is L-shaped, including a first end abutting against an end of the side frame, and a second end abutting against an end of the upper frame or the lower frame; The first end of the wrap angle includes a limiting portion extending along the length direction of the side frame, the clamping portion and the limiting portion are arranged in parallel, and the clamping portion is located at the portion close to the second end; The second installation cavity of the side frame includes a limiting card slot corresponding to the limiting portion, the limiting card slot is located below the second slot, and the limiting portion is embedded in the limiting card slot.

7. The infrared touch screen frame structure according to claim 5, characterized in that: The second installation cavity of the lower frame includes a first support rib and a second support rib that are arranged opposite to each other, the first support rib and the second support rib are arranged parallel to the horizontal plane, the first support rib is located on the side wall of the second installation cavity away from the interior of the frame structure, and the first support rib, the second support rib and the top wall of the lower frame are enclosed to form the second slot; The second installation cavity of the lower frame also includes a third support rib arranged parallel to the first support rib. The third support rib is located on a side of the first support rib away from the top wall of the lower frame. A limiting slot is formed between the first support rib and the third support rib.

8. The infrared touch screen frame structure according to claim 1, characterized in that: The upper frame and the two side frames have the same structure, the angle codes include two first angle codes and two second angle codes, and the wrap angle includes a first wrap angle and a second wrap angle corresponding to the first angle code and the second angle code respectively; One end of the side frame is detachably connected to the upper frame via the first corner bracket, and the other end of the side frame is detachably connected to the lower frame via the second corner bracket; The first wrap angle is correspondingly sleeved on the outer side of the first angle code, and the second wrap angle is correspondingly sleeved on the outer side of the second angle code.

9. The infrared touch screen frame structure according to claim 1, characterized in that: A third slot for fixing the filter strip is provided in the first installation cavity, and the third slot is located on a side of the first slot close to the inside of the frame structure; The two opposite groove walls of the third groove are provided with mutually offset mounting grooves, the heating side of the filter strip is embedded in the mounting groove, and the filter strip is arranged obliquely.

10. The infrared touch screen frame structure according to claim 1, characterized in that: The width of the lower frame is greater than that of the upper frame. The second installation cavity of the lower frame includes a mainboard installation rib. The mainboard installation rib is located below the second slot and is arranged parallel to the horizontal plane.

11. An infrared touch screen, characterized in that: It comprises the infrared touch screen frame structure as described in any one of claims 1 to 10, wherein a filter strip and an infrared circuit board are installed on the infrared touch screen frame structure.

12. A smart blackboard, characterized in that: It comprises an infrared touch screen as claimed in claim 11, wherein at least one of the two sides of the infrared touch screen is provided with a writing board.

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