Optical touch frame and optical touch display device

Abstract

The utility model provides a kind of optical touch frame and optical touch display device, the optical touch frame includes the first sub-frame in the top and bottom of intelligent interactive panel, and the second sub-frame in the two sides of intelligent interactive panel, first touchpad is set in the first sub-frame, at least one end of the first sub-frame in the top and / or the bottom is provided with corner connecting component, the corner connecting component includes outer corner connecting piece, the inner side surface of the outer corner connecting piece towards the inside of intelligent interactive panel is provided with elastic limiting component, the elastic limiting component is configured as the elastic abutment one end of corresponding first touchpad, to limit the first touchpad.

Description

Technical Field

[0001] This utility model relates to the field of display product manufacturing technology, and in particular to an optical touch frame and an optical touch display device. Background Technology

[0002] The infrared touch function of the electronic whiteboard uses a touch PCB board that can emit infrared light. The touch PCB board is placed in a hollow frame made of aluminum or iron. The touch function is composed of the top, bottom, left and right sides of the touch PCB board, forming the transmitter and receiver, and forming an infrared light grid on the glass surface of the electronic whiteboard. The accuracy of the relative position of the top and bottom touch PCB boards and the left and right touch PCB boards determines the writing accuracy of the end user when using the writing function of the electronic whiteboard.

[0003] Existing electronic whiteboard touch PCBs typically use hard positioning (restricting the movement of the touch PCB by using ribs at the outer corners). Under the influence of cumulative tolerances in structural materials, the theoretical writing accuracy is about ±1.5mm. Software optimization can achieve a specification of ±1mm, but due to the limitations of software optimization, there is still a chance that the ±1mm specification cannot be met. Utility Model Content

[0004] To solve the above-mentioned technical problems, this utility model provides an optical touch frame and an optical touch display device, which solves the problem of low writing accuracy caused by relative displacement of the top and bottom touch panels due to material tolerances.

[0005] To achieve the above objectives, the technical solution adopted in this utility model embodiment is: an optical touch frame for a smart interactive tablet, the optical touch frame including a first sub-frame located at the top and bottom of the smart interactive tablet, and a second sub-frame located on both sides of the smart interactive tablet;

[0006] The optical touch frame also includes a first touch panel disposed inside the first sub-frame.

[0007] The optical touch frame also includes a corner connecting component disposed at at least one end of the first sub-frame. The corner connecting component includes an outer corner connector. An elastic limiting component is disposed on the inner side of the outer corner connector facing the interior of the smart interactive flat panel. The elastic limiting component is configured to elastically abut against one end of the first touch panel to limit the first touch panel.

[0008] Optionally, corner connecting components are provided at both ends of the first sub-frame at the top and at both ends of the first sub-frame at the bottom.

[0009] The elastic limiting components located at opposite ends of the same first touchpad apply the same force to the first touchpad.

[0010] Optionally, the elastic limiting component includes a guide post, a sleeve sleeved outside the guide post, and a spring disposed between the guide post and the sleeve.

[0011] The axial direction of the guide post is parallel to the extension direction of the corresponding first sub-frame, and the spring can elastically deform along the axial direction of the guide post.

[0012] Optionally, a first guide groove is provided on the outer peripheral surface of the guide post, extending along the axial direction of the guide post;

[0013] The inner wall of the sleeve has a protrusion that mates with the first guide groove at one end near its opening.

[0014] Optionally, the outer circumferential surface of the guide post is further provided with an arc-shaped sliding groove extending along the circumferential direction of the guide post and a second guide groove extending along the axial direction of the guide post, wherein the first guide groove and the second guide groove are spaced apart.

[0015] Furthermore, one end of the arc-shaped slide groove is connected to the first guide groove, so that the protrusion of the sleeve can move along the first guide groove into the arc-shaped slide groove; the other end of the arc-shaped slide groove is connected to the second guide groove, so that the protrusion of the sleeve can move from the arc-shaped slide groove into the second guide groove.

[0016] The side of the second guide groove away from the arc-shaped slide is configured such that the spring is at a stop surface with a preset deformation.

[0017] Optionally, a spring positioning post is provided on the end face of the guide post or the inner top surface of the sleeve, and the spring is sleeved on the outside of the spring positioning post.

[0018] Optionally, the outer corner connector includes an L-shaped connecting plate, and the inner side of the L-shaped connecting plate facing the interior of the smart interactive flat panel is provided with an elastic limiting component; a second touch panel is provided inside the second sub-frame, and the L-shaped connecting plate includes a first connecting plate, a second connecting plate and an arc-shaped connecting plate located between the first connecting plate and the second connecting plate, the first connecting plate is connected to the second sub-frame, and the second connecting plate is connected to the first sub-frame;

[0019] The first connecting plate is provided with the elastic limiting component, and the first connecting plate is provided with a stop plate that is perpendicular to the inner side of the first connecting plate. The stop plate has a first stop surface that is located away from the arc-shaped connecting plate, and the first stop surface abuts against the second touch panel.

[0020] Optionally, the second guide groove has a first position located on the side of the stop surface near the arc-shaped slide groove in the axial direction of the guide post. The first position is spaced apart from the arc-shaped slide groove. Under the deformation of the spring, the protrusion moves between the stop surface and the first position.

[0021] The stop plate has a second stop surface disposed on the inner side away from the first connecting plate, and the second stop surface is configured to abut against the corresponding first touch panel when the protrusion is in the first position.

[0022] Optionally, the first connecting plate has a first snap-fit ​​component at one end away from the arc-shaped connecting plate, which is connected to the second sub-frame, and the second connecting plate has a second snap-fit ​​component at one end away from the arc-shaped connecting plate, which is snap-fitted to the first sub-frame.

[0023] Optionally, the corner connection assembly further includes an inner corner connector that is detachably connected to the outer corner connector. The outer corner connector also includes a side wall located on the L-shaped connecting plate. The inner side of the side wall is provided with a third guide groove extending along the extension direction of the first sub-frame. The third guide groove is configured to connect with the inner corner connector.

[0024] Optionally, the inner corner connector includes a third connecting plate connected between the first sub-frame and the second sub-frame. The third connecting plate is arranged parallel to the light-emitting surface of the display module. A first side plate is provided on the side of the third connecting plate closest to the display module. The first side plate is bent to form a first top plate covering part of the third connecting plate. The first side plate, the first top plate, and the L-shaped connecting plate together form a receiving space for accommodating the elastic limiting component.

[0025] Optionally, the third connecting plate is provided with guide ribs that cooperate with the third guide groove.

[0026] Optionally, a second side plate is provided on the side of the third connecting plate near the display module. The second side plate is located on the side of the first side plate away from the second sub-frame. The second side plate is bent to form a second top plate covering part of the third connecting plate. The second top plate is provided with screw holes for screws to pass through, so as to be fixedly connected to the side wall of the outer corner connector.

[0027] This utility model embodiment also provides an electronic whiteboard, including a display module and the aforementioned optical touch frame located around the display module.

[0028] The beneficial effects of this utility model are as follows: The optical touch frame provided in this disclosure includes a first sub-frame located at the top and bottom of the electronic whiteboard smart interactive flat panel, and a second sub-frame located on both sides of the smart interactive flat panel. A first touch panel is provided in each of the first sub-frames. A corner connecting component is provided at at least one end of the first sub-frame, and an elastic limiting component is provided in the corner connecting component. That is, the elastic limiting component is provided at opposite ends of the same first touch panel. The elastic limiting component realizes the elastic limiting and fixing of the first touch panel. This can eliminate the relative displacement of the first touch panel located on the top and bottom sides (i.e., the top and bottom) due to material tolerance, thereby improving the writing offset problem and improving writing accuracy. Attached Figure Description

[0029] Figure 1 A schematic diagram illustrating the optical touch bezel in related technologies;

[0030] Figure 2 This is a schematic diagram of the optical touch frame in an embodiment of the present invention;

[0031] Figure 3 This diagram illustrates the outer corner connector in an embodiment of the present invention.

[0032] Figure 4 This diagram illustrates the outer corner connector in an embodiment of the present invention.

[0033] Figure 5 This diagram illustrates the outer corner connector in an embodiment of the present invention.

[0034] Figure 6 This diagram illustrates the outer corner connector in an embodiment of the present invention.

[0035] Figure 7 express Figure 6 The right view;

[0036] Figure 8 express Figure 6 Schematic diagram of the AA-direction section;

[0037] Figure 9 express Figure 6 Schematic diagram of the B_B section;

[0038] Figure 10 A schematic diagram showing the sleeve in an embodiment of this utility model;

[0039] Figure 11 A schematic diagram showing the sleeve in an embodiment of this utility model;

[0040] Figure 12 This diagram shows an exploded view of the sleeve and spring in an embodiment of the present invention.

[0041] Figure 13 A schematic diagram showing the assembly state of the sleeve and spring in an embodiment of this utility model;

[0042] Figure 14 This is an exploded view of the sleeve and guide post in an embodiment of the present invention;

[0043] Figure 15 This is an exploded view showing the assembled spring, sleeve, and guide post in an embodiment of the present invention.

[0044] Figure 16 A schematic diagram showing the state in which the protrusion of the sleeve moves along the first guide groove of the guide post to the arc-shaped slide groove;

[0045] Figure 17 A schematic diagram showing the state of the sleeve protrusion moving along the arc-shaped groove to the second guide groove;

[0046] Figure 18 A schematic diagram showing the state of the sleeve protrusion moving along the second guide groove to the stop surface;

[0047] Figure 19 A schematic diagram showing the external corner connector in an embodiment of this utility model;

[0048] Figure 20 An exploded view showing the outer corner connector and the inner corner connector;

[0049] Figure 21 A schematic diagram showing the assembly status of the outer corner connector and the inner corner connector;

[0050] Figure 22 This diagram illustrates the connection status between the corner connection component and the first and second sub-borders.

[0051] Figure 23 express Figure 22 A schematic diagram of the CC-direction section. Detailed Implementation

[0052] To make the objectives, technical solutions, and advantages of the embodiments of this disclosure clearer, the technical solutions of the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this disclosure. All other embodiments obtained by those skilled in the art based on the described embodiments of this disclosure without creative effort are within the scope of protection of this disclosure.

[0053] Unless otherwise defined, the technical or scientific terms used in this disclosure shall have the ordinary meaning understood by one of ordinary skill in the art to which this disclosure pertains. The terms “first,” “second,” and similar terms used in this disclosure do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Similarly, the terms “an,” “a,” or “the,” and similar terms do not indicate a quantity limitation, but rather indicate the presence of at least one. The terms “including,” “comprising,” or “containing,” and similar terms mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. The terms “connected,” “linked,” or similar terms are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. The terms “upper,” “lower,” “left,” and “right,” etc., are used only to indicate relative positional relationships, and these relative positional relationships may change accordingly when the absolute position of the described objects changes.

[0054] The features such as "parallel," "perpendicular," and "identical" used in the embodiments of this disclosure include features in the strict sense of "parallel," "perpendicular," and "identical," as well as cases where "approximately parallel," "approximately perpendicular," and "approximately identical" include certain tolerances. Taking into account the measurement and the tolerances associated with the measurement of a specific quantity (e.g., limitations of the measurement system), they represent the acceptable deviation range for a specific value as determined by a person skilled in the art. For example, "approximately" can mean within one or more standard deviations, or within 3% or 5% of said value.

[0055] Infrared electronic whiteboards are currently one of the most widely used tools in teaching, meetings, and other intelligent interactive whiteboard applications. They can communicate with computers, connecting to a PC and projecting content from the PC onto the whiteboard screen. With the support of specialized applications, a large-screen, interactive collaborative meeting or teaching environment can be created. Using a specific pen instead of a mouse, users can operate on the whiteboard, running any application and performing any operation possible on a computer using a keyboard and mouse, such as editing, annotating, and saving files.

[0056] The infrared electronic whiteboard includes a display module and a frame surrounding the display module. The frame includes a top frame on the top side of the electronic whiteboard, a bottom frame on the bottom side of the electronic whiteboard, and side frames on the left and right sides of the electronic whiteboard. Touch PCBs are provided in the top frame, bottom frame, and two side frames around the whiteboard. The touch PCBs in the top frame and bottom frame constitute infrared emitters and receivers, forming infrared rays extending in a first direction. The touch PCBs in the two side frames constitute infrared emitters and receivers, forming infrared rays extending in a second direction. The infrared rays extending in the first direction and the infrared rays extending in the second direction form an infrared light grid. This grid covers the display surface of the display module. Any opaque object that comes into contact with the whiteboard surface will block the infrared rays, resulting in no signal or a weakened signal. The touch position can be determined by calculating the signal strength and the position of the infrared devices.

[0057] However, existing interactive whiteboards typically use hard positioning on their touch PCB boards, for example... Figure 1 , Figure 1 The system uses a stop plate 2 located at the outer corner to rigidly limit the touch PCB board 1. Theoretically, the writing accuracy is approximately ±1.5mm due to the cumulative tolerances of the structural materials. Software optimization achieves a specification of ±1mm, but due to the limitations of software optimization, there is still a chance that the ±1mm specification cannot be met. This can easily cause relative displacement between the relatively positioned pair of touch PCB boards (forming the infrared transmitter and receiver), thus affecting the writing accuracy.

[0058] refer to Figures 2-23 To address the aforementioned issues, this embodiment provides an optical touch bezel for a smart interactive flat panel. Specifically, it surrounds the display module of the smart interactive flat panel. The optical touch bezel includes a first sub-bezel 11 located at the top and bottom of the smart interactive flat panel, and second sub-bezels 12 located on both sides of the smart interactive flat panel. A first touchpad 111 is disposed within the first sub-bezel 11, and a second touchpad 122 is disposed within the second sub-bezel 12.

[0059] A corner connection assembly is provided at least one end (at least one end in the extension direction of the first sub-frame) located within the first sub-frame at the top and / or at least one end of the first sub-frame at the bottom. The corner connection assembly includes an inner corner connector 2000 and an outer corner connector 1000 that are detachably connected. The outer corner connector 1000 includes an L-shaped connecting plate 100. An elastic limiting component 200 is provided on the inner side of the L-shaped connecting plate 100 facing the display module. The elastic limiting component 200 is configured to elastically abut against one end of the corresponding first touchpad 111 to limit the first touchpad 111.

[0060] At least one of the two first sub-borders has corner connecting components at its opposite ends, and at least one first sub-border 11 has corner connecting components at its extending direction (refer to...). Figure 2 At both ends of the first sub-frame 11 in the X direction, a corner connecting component is provided. That is, at least one first sub-frame 11 is provided with elastic limiting components 200 at opposite ends in its extension direction. The elastic limiting components 200 are configured to elastically abut against one end of the corresponding first touch panel 111 to limit the first touch panel 111. In other words, each first sub-frame 11 is elastically limited at both ends in its extension direction by the elastic limiting components 200. By controlling the elastic force of the elastic limiting components 200, the force applied to the first sub-frame 11 can be controlled, thereby accurately positioning the corresponding first sub-frame 11. This allows the two first sub-frames 11 located at the top and bottom of the electronic whiteboard to be positioned facing each other, preventing relative displacement between the two first sub-frames 11. In other words, the two first touch panels 111 located on the two first sub-frames 11 are positioned facing each other, allowing the infrared emitters and receivers on the two first touch panels 111 to be positioned facing each other. The infrared receivers can accurately receive the infrared rays emitted by the corresponding infrared emitters, improving writing accuracy.

[0061] It should be noted that, in some embodiments, the corner connecting components can be provided at only the opposite ends of one of the first sub-frames, while the other first sub-frame is rigidly fixed. This allows for adjustment of the position of the elastically positioned first sub-frame by referencing the position of the other first sub-frame, preventing relative displacement of the two first touchpads 111 within the two first sub-frames. In some embodiments, the corner connecting components are provided at both opposite ends of each first sub-frame, meaning that the corner connecting components are provided at all four corners of the frame, effectively preventing relative displacement of the two first touchpads 111 and improving writing accuracy.

[0062] It should be noted that both the first touchpad and the second touchpad include a main circuit board, i.e., a PCB board.

[0063] In an exemplary embodiment, the elastic limiting components 200 located at opposite ends of the same first touchpad 111 apply the same force to the first touchpad 111.

[0064] By adopting the above solution, the first touchpad 111 can be located in the middle of the corresponding first sub-frame 11, so that the first touchpad 111 is centered and the relative displacement of the top and bottom touchpads caused by material tolerances is eliminated; that is, writing accuracy close to zero deviation can be achieved without using software optimization.

[0065] In an exemplary embodiment, the elastic limiting component 200 includes a guide post 201, a sleeve 202 sleeved on the outside of the guide post 201, and a spring 203 disposed between the guide post 201 and the sleeve 202.

[0066] The guide post 201 is fixed on the L-shaped connecting plate 100. The axial direction of the guide post 201 is parallel to the extension direction of the corresponding first sub-frame 11. The spring 203 can elastically deform along the axial direction of the guide post 201 to apply a certain force to the corresponding first touch panel 111.

[0067] It should be noted that after the frame is assembled, the spring 203 in the elastic limiting component 200 is in a deformed state, so that the two opposite ends of the first touch panel 111 are simultaneously subjected to the force applied by the corresponding elastic limiting component 200, so as to limit and fix the first touch panel 111 in the extension direction of the first sub-frame 11.

[0068] In an exemplary embodiment, a spring 203 positioning post 2022 is provided on the end face of the guide post 201 (the side away from the L-shaped connecting plate 100 along the axial direction of the guide post 201) or on the inner top surface of the sleeve 202, and the spring 203 is sleeved on the outside of the spring 203 positioning post 2022.

[0069] In some embodiments, the end face of the guide post 201 is provided with a positioning hole 2024, and the inner top surface of the sleeve 202 is provided with a positioning post 2022 for the spring 203. After the sleeve 202 is sleeved on the guide post 201, the positioning post 2022 for the spring 203 can be inserted into the positioning hole 2024, and there is a gap between the positioning post 2022 for the spring 203 and the bottom surface of the positioning hole 2024. The end of the spring 203 away from the inner top surface of the sleeve 202 contacts the bottom surface of the positioning hole 2024 to reserve movement space for the expansion and contraction deformation of the spring 203. Furthermore, the guide post 201 cooperates with the positioning hole 2024 to limit and guide the deformation of the spring 203, preventing the spring 203 from shifting.

[0070] In an exemplary embodiment, a first guide groove 2011 extending along the axial direction of the guide post 201 is provided on the outer peripheral surface of the guide post 201;

[0071] The inner wall 104 of the sleeve 202 has a protrusion 2021 that cooperates with the first guide groove 2011 at one end near its opening.

[0072] The first guide groove 2011 and the protrusion 2021 cooperate to assemble the sleeve 202 and the guide post 201. In some embodiments, two first guide grooves 2011 are provided on the outer peripheral surface of the guide post 201. The two first guide grooves 2011 are symmetrically arranged with the radial center point of the guide post 201 as the center. Two protrusions 2021 are provided on the inner sidewall 104 of the sleeve 202 near its opening. The two protrusions 2021 are arranged in a one-to-one correspondence with the two first guide grooves 2011, which improves the connection stability between the guide post 201 and the sleeve 202.

[0073] In an exemplary embodiment, the outer peripheral surface of the guide post 201 is further provided with an arc-shaped sliding groove 2012 extending along the circumferential direction of the guide post 201, and a second guide groove 2013 extending along the axial direction of the guide post 201. The first guide groove 2011 and the second guide groove 2013 are spaced apart, and one end of the arc-shaped sliding groove 2012 is connected to the end of the first guide groove 2011 near the L-shaped connecting plate 100, so that the protrusion 2021 of the sleeve 202 can move along the first guide groove 2011 into the arc-shaped sliding groove 2012; the other end of the arc-shaped sliding groove 2012 is connected to the end of the second guide groove 2013 near the L-shaped connecting plate 100, so that the protrusion 2021 of the sleeve 202 can move from the arc-shaped sliding groove 2012 into the second guide groove 2013.

[0074] The side of the second guide groove 2013 away from the L-shaped connecting plate 100 is configured such that the spring 203 is in a stop surface 20131 with a preset deformation.

[0075] In the embodiment where the sleeve 202 is provided with two protrusions 2021, the guide post 201 includes two second guide grooves 2013 corresponding one-to-one with the two protrusions 2021, and two arc-shaped sliding grooves 2012.

[0076] refer to Figure 12 and Figure 13When assembling the guide post 201 and the sleeve 202, the spring 203 is first assembled with the sleeve 202, that is, the spring 203 is fixed to the positioning post 2022 on the inner top surface of the sleeve 202; then the protrusion 2021 on the sleeve 202 moves along the corresponding first guide groove 2011, so that the sleeve 202 moves towards the arc-shaped sliding groove 2012 in a direction closer to the L-shaped connecting plate 100. Figure 16 This is a schematic diagram showing the state of the protrusion 2021 moving to the arc-shaped slide groove 2012; then, the sleeve 202 is rotated (the rotation angle can be set according to actual needs, such as 90 degrees, but is not limited to this), so that the protrusion 2021 slides along the arc-shaped slide groove 2012 to the second guide groove 2013, for reference. Figure 17 Then, the protrusion 2021 of the sleeve 202 moves along the corresponding second guide groove 2013 and moves away from the L-shaped connecting plate 100 to the stop surface 20131, completing the assembly of the elastic limiting component 200. Figure 18 The diagram shows the state in which the protrusion 2021 moves to the stop surface 20131. Under the action of the spring force of the spring 203 alone, the sleeve 202 stops at the stop surface 20131.

[0077] It should be noted that the magnitude of the force applied by the elastic limiting component 200 to the corresponding first touch panel 111 is related to the deformation of the spring 203. After the elastic limiting component 200 is assembled, the sleeve 202 stops at the stop surface 20131. In the axial direction of the guide post 201, the difference between the distance between the stop surface 20131 and the inner top surface of the sleeve 202 and the spring 203 is the deformation of the spring 203. That is, the magnitude of the force applied by the elastic limiting component 200 to the first touch panel 111 can be adjusted by setting the position of the stop surface 20131 (it should be noted that the force applied by the elastic limiting component 200 to the first touch panel 111 is greater than zero).

[0078] In some embodiments, the elastic limiting components 200 located at opposite ends of the same first touch panel 111 apply the same force, which ensures that the first touch PCB is centered in the corresponding sub-frame. That is, the elastic limiting components 200 located at opposite ends of the same first touch panel 111 have the same structure. In some embodiments, the corner connecting components located at opposite ends of the same first touch panel 111 have the same structure.

[0079] In an exemplary embodiment, the top of the sleeve 202 is provided with through holes corresponding one-to-one with the protrusions 2021 (see reference). Figure 10 , Figure 11 and Figure 14 The through hole 2023 is provided in the sleeve 202. The orthographic projection of the protrusion 2021 on the top of the sleeve 202 partially overlaps with the through hole 2023. In some embodiments, the orthographic projection of the protrusion 2021 on the top of the sleeve 202 is located inside the through hole 2023, but this is not a limitation. The through hole facilitates observation of the connection status between the sleeve 202 and the guide post 201.

[0080] In an exemplary embodiment, the L-shaped connecting plate 100 includes a first connecting plate 101, a second connecting plate 102, and an arc-shaped connecting plate 103 located between the first connecting plate 101 and the second connecting plate 102. The first connecting plate 101 is connected to the second sub-frame 12, and the second connecting plate 102 is connected to the first sub-frame 11.

[0081] The elastic limiting component 200 is provided on the inner side of the first connecting plate 101 facing the display module. A stop plate 105 is provided on the first connecting plate 101 perpendicular to the inner side of the first connecting plate 101. The stop plate 105 has a first stop surface 1052 located away from the arc-shaped connecting plate 103. The first stop surface 1052 abuts against the second touch panel 122.

[0082] When in use, the electronic whiteboard is in a vertical position. The second touchpad 122, under its own weight, will abut against the first stop surface 1052. The first stop surface 1052 serves to limit and fix the second touchpad 122. (Refer to...) Figure 22 and Figure 23 .

[0083] For example, the stop plate 105 is located on the side of the elastic limiting component 200 near the backlight side of the electronic whiteboard.

[0084] refer to Figure 22 and Figure 23 In an exemplary embodiment, a flexible circuit board 123 is provided between the first touch panel 111 and the second touch panel 122 for signal connection, and the flexible circuit board 123 is located between the elastic limiting component 200 and the stop plate 105.

[0085] In an exemplary embodiment, the second guide groove 2013 has a first position located on the side of the stop surface 20131 near the arc-shaped slide groove 2012 in the axial direction of the guide post 201. The first position is spaced apart from the arc-shaped slide groove 2012. Under the deformation of the spring 203, the protrusion 2021 moves between the stop surface 20131 and the first position.

[0086] The stop plate 105 has a second stop surface 1051 disposed on the inner side away from the first connecting plate 101. The second stop surface 1051 is configured such that when the protrusion 2021 is in the first position, the second stop surface 1051 abuts against the corresponding first touch panel 111. Figure 22 .

[0087] The second stop surface 1051 limits the distance the protrusion 2021 moves within the second guide groove 2013 when the elastic limiting component 200 is subjected to force causing the spring 203 to deform, preventing the protrusion 2021 from moving from the second guide groove 2013 to the arc-shaped slide groove 2012, which would cause elastic failure.

[0088] In an exemplary embodiment, the first connecting plate 101 is provided with a first snap-fit ​​member 1011 connected to the second sub-frame 12 at one end away from the arc-shaped connecting plate 103, and the second connecting plate 102 is provided with a second snap-fit ​​member 1021 snap-fitted to the first sub-frame 11 at one end away from the arc-shaped connecting plate 103.

[0089] The first snap-fit ​​member 1011 has a U-shaped structure and includes a first connecting arm, a second connecting arm, and a third connecting arm located between the first connecting arm and the second connecting arm. At least part of the third connecting arm is exposed outside the first connecting plate 101. Thus, when the L-shaped connecting plate 100 is connected to the corresponding second sub-frame 12, the third connecting arm of the first snap-fit ​​member 1011 can be snapped onto the corresponding side wall 104 of the second sub-frame 12.

[0090] In an exemplary embodiment, the side of the third connecting arm away from the first connecting plate 101 includes at least a first region 10111 disposed away from the arc-shaped connecting plate 103. The first region 10111 is configured as an inclined guide surface to facilitate the connection between the first connecting plate 101 and the second sub-frame 12.

[0091] In an exemplary embodiment, the structure of the second snap-fit ​​member 1021 may be the same as or different from that of the first snap-fit ​​member 1011, as long as the snap-fit ​​between the second connecting plate 102 and the corresponding first sub-frame 11 can be achieved. In some embodiments, the second snap-fit ​​member 1021 includes at least one strip-shaped snap-fit ​​block, and part of the snap-fit ​​block is exposed outside the second connecting plate 102 so that when connected to the first sub-frame 11, it snaps onto the corresponding side wall 104 of the first sub-frame 11.

[0092] For example, the card block extends to the arc-shaped connecting plate 103 and covers part of the arc-shaped connecting plate 103, which improves the connection strength between the arc-shaped connecting plate 103 and the second connecting plate 102, and also enhances the connection stability between the L-shaped connecting plate 100 and the first sub-frame 11.

[0093] In an exemplary embodiment, the outer corner connector 1000 further includes a side wall 104 located on the L-shaped connecting plate 100. The side wall 104 and the stop plate 105 are located on opposite sides of the elastic limiting component 200. The inner side of the side wall 104 is provided with a third guide groove 1041 extending along the extension direction of the first sub-frame 11. The third guide groove 1041 is configured to connect with the inner corner connector 2000.

[0094] For example, after the corner connecting assembly is assembled with the first sub-frame 11 and the second sub-frame 12, the sidewall 104 may be located on the same plane as the corresponding sidewall 104 of the first sub-frame 11 or the second sub-frame 12 (the sidewall 104 located on the display side of the electronic whiteboard).

[0095] refer to Figure 20 In an exemplary embodiment, the inner corner connector 2000 includes a third connecting plate connected between the first sub-frame 11 and the second sub-frame 12. The third connecting plate is arranged parallel to the light-emitting surface of the display module. A first side plate 3012 is provided on the side of the third connecting plate close to the display module. The first side plate 3012 is bent to form a first top plate 3013 covering a portion of the first connecting plate 101. The first side plate 3012, the first top plate 3013, and the L-shaped connecting plate 100 together form a receiving space for accommodating the elastic limiting component 200.

[0096] It should be noted that a through hole is provided on the first side panel 3012 so that the first touch panel 111 can pass through.

[0097] For example, the side of the stop plate 105 opposite to the first stop surface 1052 is an inclined surface 1053, and the corner between the inclined surface 1053 and the second stop surface 1051 is rounded to avoid sharp corners causing damage or interference to other components.

[0098] In an exemplary embodiment, the third connecting plate is provided with a guide rib 3011 that cooperates with the third guide groove 1041. The cooperation between the third guide groove 1041 and the guide rib 3011 facilitates the assembly of the outer corner connector 1000 and the inner corner connector 2000.

[0099] In an exemplary embodiment, a second side plate 3014 is provided on the side of the third connecting plate near the display module. The second side plate 3014 is located on the side of the first side plate 3012 away from the second sub-frame 12. The second side plate 3014 is bent to form a second top plate 3015 covering a portion of the third connecting plate. The second top plate 3015 is provided with screw holes (first screw holes 30141) for screws to pass through, so as to be fixedly connected to the side wall 104 of the outer corner connector 1000. The side wall 104 of the outer corner connector 1000 is provided with screw holes (second screw holes 1042) that mate with the screw holes on the second top plate 3015, so as to allow screws to pass through, so as to fix the outer corner connector 1000 and the inner corner connector 2000.

[0100] This utility model embodiment also provides an optical touch display device, including a display module and the aforementioned optical touch bezel located around the display module.

[0101] The display module can display images, whether moving (e.g., video) or stationary (e.g., still images), and whether it contains text or pictures. For example, when the electronic whiteboard is used in a meeting setting, the display module can display slides, meeting minutes, etc.; when the electronic whiteboard is used in a teaching setting, the display module can display text, demonstration animations, etc.

[0102] The display module includes a display panel. The display panel can be a Liquid Crystal Display (LCD); it can also be an electroluminescent display panel or a photoluminescent display panel. If the display panel is an electroluminescent display panel, it can be an Organic Light-Emitting Diode (OLED) display panel, a Quantum Dot Light-Emitting Diode (QLED) display panel, or a Micro Light-Emitting Diode (Micro LED), etc. If the display panel is a photoluminescent display panel, it can be a Quantum Dot Photoluminescent Display Panel.

[0103] The display module may include a display panel and a backlight assembly. The display panel includes a light-emitting surface for displaying images and a backlight surface opposite to the light-emitting surface. The backlight assembly is connected to the backlight surface of the display panel. The backlight assembly includes a backlight plate and a backplate. The backlight plate is connected to the backlight surface of the display panel and provides a light source for the display panel. The backplate covers the side of the backlight plate away from the display panel and protects the backlight plate. The backplate may be made of thin metal sheets such as aluminum alloy, stainless steel, or galvanized steel sheet through a stamping process. The surface of the backplate has concave and convex shapes to increase its rigidity and protect the backlight plate and the display panel.

[0104] The electronic whiteboard also includes a frame, which is fixedly connected to the periphery of the display module to support and protect the display module. The frame is rectangular in shape. With the electronic whiteboard facing the user as a reference, the frame may include two first sub-frames 11 located at the top and bottom of the electronic whiteboard, and two second sub-frames located on the left and right sides of the electronic whiteboard. One first sub-frame 11 is connected to the upper edge of the display module, one first sub-frame 11 is connected to the lower edge of the display module, one second sub-frame is connected to the left edge of the display module, and one second sub-frame is connected to the right edge of the display module.

[0105] In practical applications, the two first sub-frames 11 and the two second sub-frames can each be made of a long strip profile (e.g., an aluminum profile), and connected end to end to form the frame. The cross-sections of the two first sub-frames 11 and the two second sub-frames can be the same or different. For example, the cross-section of the bottom first sub-frame 11 is larger than the cross-sections of other parts of the frame to facilitate the installation of various signal interfaces, such as a front-panel USB port, on the bottom frame.

[0106] For example, the electronic whiteboard also includes a touch component, which comprises a transmitting component and a receiving component. Both the transmitting and receiving components are disposed within the bezel and are positioned opposite each other. During operation, the transmitting component emits infrared light, which propagates along the output light path of the display module and is received by the receiving component. When a user's finger or stylus is placed in the propagation path of the infrared light, the infrared light is blocked, preventing the receiving component from receiving it and thus recognizing the user's touch operation. In practical applications, an optical lens can also be disposed on the bezel, located within the propagation path of the infrared light.

[0107] For example, the transmitting component includes a plurality of infrared LEDs arranged at intervals along one side of the display module. Correspondingly, the receiving component includes a plurality of infrared sensors arranged at intervals along the opposite side of the display module, with each infrared LED corresponding to one of the infrared sensors. The location of the touch operation is determined based on the position of the infrared sensor that cannot receive infrared light.

[0108] It should be noted that the sending component includes one of the two first touchpads or the two second touchpads, and the receiving component includes the other of the two first touchpads or the two second touchpads.

[0109] It should be noted that the aforementioned electronic whiteboard is a type of smart interactive flat panel. Smart interactive flat panels are primarily used in scenarios including meetings, education, and business. Their functions include handwriting recognition, screen projection, and remote video conferencing. Operating systems include Android and Windows. Smart interactive flat panels are generally 32 inches or larger, for example, 55, 65, 75, 86, and 98 inches. Smart interactive flat panels can also be used with touch-enabled display devices.

[0110] The following points need to be explained:

[0111] (1) The accompanying drawings of the embodiments of this disclosure only involve the structures involved in the embodiments of this disclosure. Other structures can be referred to the general design.

[0112] (2) For clarity, the thickness of layers or regions is enlarged or reduced in the drawings used to describe embodiments of the present disclosure, i.e., these drawings are not drawn to actual scale. It will be understood that when an element such as a layer, film, region or substrate is referred to as being “above” or “below” another element, the element may be “directly” located “above” or “below” the other element or there may be intermediate elements.

[0113] (3) Where there is no conflict, the embodiments of this disclosure and the features in the embodiments can be combined with each other to obtain new embodiments.

[0114] It is understood that the above embodiments are merely exemplary implementations used to illustrate the principles of this utility model, and the utility model is not limited thereto. For those skilled in the art, various modifications and improvements can be made without departing from the spirit and essence of this utility model, and these modifications and improvements are also considered to be within the protection scope of this utility model.

Claims

1. An optical touch frame for a smart interactive flat panel, characterized in that, The optical touch frame includes a first sub-frame located at the top or bottom of the smart interactive tablet, and a second sub-frame located on the side of the smart interactive tablet. The optical touch frame also includes a first touch panel disposed inside the first sub-frame; The optical touch frame also includes a corner connecting component disposed at at least one end of the first sub-frame. The corner connecting component includes an outer corner connector. An elastic limiting component is disposed on the inner side of the outer corner connector facing the inside of the smart interactive flat panel. The elastic limiting component is configured to elastically abut against one end of the first touch panel to limit the first touch panel.

2. The optical touch frame according to claim 1, characterized in that, The elastic limiting component includes a guide post, a sleeve sleeved outside the guide post, and a spring disposed between the guide post and the sleeve. The axial direction of the guide post is parallel to the extension direction of the corresponding first sub-frame, and the spring can elastically deform along the axial direction of the guide post.

3. The optical touch frame according to claim 2, characterized in that, A first guide groove is provided on the outer peripheral surface of the guide post, extending along the axial direction of the guide post. The inner wall of the sleeve has a protrusion that mates with the first guide groove at one end near its opening.

4. The optical touch frame according to claim 3, characterized in that, The outer circumferential surface of the guide post is also provided with an arc-shaped sliding groove extending along the circumferential direction of the guide post, and a second guide groove extending along the axial direction of the guide post, wherein the first guide groove and the second guide groove are spaced apart. Furthermore, one end of the arc-shaped slide groove is connected to the first guide groove, so that the protrusion of the sleeve can move along the first guide groove into the arc-shaped slide groove; the other end of the arc-shaped slide groove is connected to the second guide groove, so that the protrusion of the sleeve can move from the arc-shaped slide groove into the second guide groove. The side of the second guide groove away from the arc-shaped slide is configured such that the spring is at a stop surface with a preset deformation.

5. The optical touch frame according to claim 2, characterized in that, A spring positioning post is provided on the end face of the guide post or the inner top surface of the sleeve, and the spring is sleeved on the outside of the spring positioning post.

6. The optical touch frame according to claim 4, characterized in that, The outer corner connector includes an L-shaped connecting plate, and the inner side of the L-shaped connecting plate facing the interior of the smart interactive flat panel is provided with an elastic limiting component. A second touch panel is provided inside the second sub-frame. The L-shaped connecting plate includes a first connecting plate, a second connecting plate, and an arc-shaped connecting plate located between the first connecting plate and the second connecting plate. The first connecting plate is connected to the second sub-frame, and the second connecting plate is connected to the first sub-frame. The first connecting plate is provided with the elastic limiting component, and the first connecting plate is provided with a stop plate that is perpendicular to the inner side of the first connecting plate. The stop plate has a first stop surface that is located away from the arc-shaped connecting plate, and the first stop surface abuts against the second touch panel.

7. The optical touch frame according to claim 6, characterized in that, The second guide groove has a first position located on the side of the stop surface near the arc-shaped slide groove in the axial direction of the guide post. The first position is spaced apart from the arc-shaped slide groove. Under the deformation of the spring, the protrusion moves between the stop surface and the first position. The stop plate has a second stop surface disposed on the inner side away from the first connecting plate, and the second stop surface is configured to abut against the corresponding first touch panel when the protrusion is in the first position.

8. The optical touch frame according to claim 6, characterized in that, The first connecting plate has a first snap-fit ​​component at one end away from the arc-shaped connecting plate, which is connected to the second sub-frame. The second connecting plate has a second snap-fit ​​component at one end away from the arc-shaped connecting plate, which is snap-fitted to the first sub-frame.

9. The optical touch frame according to claim 6, characterized in that, The corner connection assembly further includes an inner corner connector that is detachably connected to the outer corner connector. The outer corner connector also includes a side wall located on the L-shaped connecting plate. The inner side of the side wall is provided with a third guide groove extending along the extension direction of the first sub-frame. The third guide groove is configured to connect with the inner corner connector.

10. The optical touch frame according to claim 9, characterized in that, The inner corner connector includes a third connecting plate connected between the first sub-frame and the second sub-frame. The third connecting plate is arranged parallel to the light-emitting surface of the display module. A first side plate is arranged on the side of the third connecting plate close to the display module. The first side plate is bent to form a first top plate covering part of the third connecting plate. The first side plate, the first top plate and the L-shaped connecting plate together form a receiving space for accommodating the elastic limiting component.

11. The optical touch frame according to claim 10, characterized in that, The third connecting plate is provided with guide ribs that cooperate with the third guide groove.

12. The optical touch frame according to claim 10, characterized in that, The third connecting plate is provided with a second side plate on the side near the display module. The second side plate is located on the side of the first side plate away from the second sub-frame. The second side plate is bent to form a second top plate covering part of the third connecting plate. The second top plate is provided with screw holes for screws to pass through, so as to be fixedly connected to the side wall of the outer corner connector.

13. The optical touch frame according to claim 1, characterized in that, Corner connecting components are provided at both ends of the first sub-frame located at the top, and corner connecting components are provided at both ends of the first sub-frame located at the bottom. The elastic limiting components at opposite ends of the same first touchpad apply the same force to the first touchpad.

14. An optical touch display device, characterized in that, It includes a display module and an optical touch bezel as described in any one of claims 1-13 located around the display module.

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