Patent ID: 12189903

Therein, the above figures include the following reference numerals:10, Infrared Touch Frame;11, Frame Body;111, First Step;112, First Mounting Groove;1121, Slot;1122, Second Step;12, PCB Assembly;20, Glass Cover Plate;31, Inward concave Surface;32, Support Pad;40, Filter Bar;60, Fixing Piece.

DETAILED DESCRIPTION

Hereinafter, the technical solutions in the embodiments of the present disclosure will be described in combination with the drawings in the embodiments of the present disclosure. Definitely, the described embodiments are only a part of the embodiments of the present disclosure, not all of the embodiments. The following description of at least one exemplary embodiment in face merely illustrative, which does not serve as any limitation on the present disclosure and its application or use. Based on the embodiments of the present disclosure, all other embodiments obtained by those skilled in the art without making creative labor shall fall within the claimed scope of the present disclosure.

As shown inFIGS.1and2, Embodiment 1 of the present disclosure provides a touch frame assembly. This touch frame assembly includes an infrared touch frame10, a glass cover plate20and a fixing structure. The infrared touch frame10includes a frame body11and a PCB assembly12arranged in the frame body11. The glass cover plate20is located on an inner side of the PCB assembly12. A touch operation can be performed by touching the glass cover plate20. The glass cover plate20can be fixed to the frame body11by the fixing structure provided between the frame body11and the glass cover plate20. An inward concave of the glass cover plate20can be controlled by the curvature of the frame body11and the fixing structure.

By applying the touch frame assembly provided in this embodiment, after the glass cover plate20is fixed on the frame body11through the fixing structure, the inward concave of the glass cover plate20can be controlled by the curvature of the frame body11and the fixing structure, so as to prevent the glass cover plate20from blocking infrared signal transmission of the PCB assembly12due to the convex during use, thereby ensuring a normal operation of infrared touch. In addition, by adopting the display device with the above structure, such as the interactive white board, it is not necessary to control the inward concave of the glass cover plate20by selecting glass, which can reduce the loss of glass, thereby improving the production efficiency, simplifying the structure and reducing the low cost.

In this embodiment, the frame body, as the frame of the display device, is formed by bending, which can be machined in various forms, such as rolling, so that the frame body11forms an inward concave surface and is recessed inward, and the thickness of the frame body11is kept consistent. As shown inFIG.2, the thickness of the frame body11is kept consistent. In this embodiment, the backlight module is located inside the display device, the PCB assembly12is installed in the frame body11, and the glass cover plate20is located on the inner side of the PCB assembly12. It should be noted that the frame body11is provided with a PCB assembly12. The PCB assembly12is provided with an infrared emission tube201and an infrared receiving tube203. Infrared rays emitted by the infrared emission tube201are received by the infrared receiving tube203, and an infrared matrix crossing vertically and horizontally is formed above the glass cover plate. When the user touches the screen, a controller determines a specific position of the contact point on the screen, thereby completing the infrared touch operation.

As shown inFIGS.1and2, the glass cover plate20is located on the inner side of the PCB assembly12. Since the frame body11is bent inward, after the glass cover plate20is fixedly mounted on the frame body11, the glass cover plate20will be recessed inward due to the attachment of the glass cover plate20to the bent frame body11. In some implementations, the frame body11forms an inward concave arc-surface. When the glass cover plate20is fixedly connected with the frame body11, the glass cover plate20deforms along with the inward concave of the frame body11to achieve the inward concave of the glass cover plate20. Then, the glass cover plate20is fixed on the frame body through the fixing piece60to maintain the inward concave of the glass cover plate20, so as to prevent the glass cover plate20from blocking infrared signals emitted by the PCB assembly12due to the convex during use. As shown inFIG.1, a direction of the arrow in the figure indicates infrared signal transmission. At this time, the glass cover plate20is recessed inward, and the signal is normally transmitted, thereby ensuring the normal operation of the infrared touch.

As shown inFIG.2, in this embodiment, the frame body11is provided with an inward concave surface31for connecting the glass cover plate20. The inward concave surface31is recessed toward a side of the frame body11facing away from the PCB assembly12. A part of the surface of the glass cover plate20is attached to the inward concave surface31. When the fixing structure fixes the glass cover plate20to the infrared touch frame, the glass cover plate20is kept in an inward concave state. The glass cover plate20mounted on the frame body11is recessed inward by a molding operation on the whole frame body11, which is simple in structure and low in cost.

In some implementations, the side of the frame body11facing away from the PCB assembly12is bent to form a depression, and the glass cover plate20is fixedly mounted on the frame body11so that the glass cover plate20is recessed inward. That is, the frame body11forms an inward concave surface31which is recessed inward. In some implementations, when the glass cover plate20is fixedly connected in the frame body11, the glass cover plate20deforms with the depression of the frame body11to achieve the concave of the glass cover plate20, thereby preventing the glass cover plate20from blocking the infrared signal transmission of the PCB assembly12due to the convex during use, and thus ensuring the normal infrared touch operation.

In this embodiment, the inward concave surface31is an arc-shaped concave surface. The adoption of the arc-shaped concave structure facilitates the deformation of the glass cover plate20by using the arc-shaped concave surface.

In this embodiment, the arc-shaped concave surface has a symmetrical structure, and the glass cover plate20can be symmetrically depressed, so that the inward concave of the glass cover plate20is more stable. Preferably, a highest point of the arc-shaped concave surface is arranged corresponding to both ends of the glass cover plate20, a lowest point of the arc-shaped concave surface is arranged corresponding to a middle point of a long edge of the glass cover plate20, the highest point of the arc-shaped concave surface is arranged corresponding to both ends of the frame body11, and the lowest point of the arc-shaped concave surface is arranged corresponding to a middle point of a long edge of the frame body11, so that the glass cover plate20can achieve uniform depression, which prevents the glass cover plate20from a fracture due to excessive deformation of local depression. In addition, since a length of the long edge of the glass cover plate20is large, it is easy to bend the glass cover plate20from the middle portion to the inner side, so as to achieve the inward concave of the glass cover plate20, which is an optional scheme.

In this embodiment, a height difference between the highest point of the arc-shaped concave surface and the lowest point of the arc-shaped concave surface is H, and H has a value range of 0.5 mm-5 mm. It should be pointed out that when the value of H is too small, the bending of the glass cover plate20is not obvious. At this time, when the glass cover plate20is convex, it is easy to cause that the infrared signal is unable to be transmitted normally. When the value of H is too large, it is easy to cause fracture of the glass cover plate20. Therefore, the above value range of H is optional.

In this embodiment, the outer contour of the glass cover plate20is rectangular, and the long edge of the glass cover plate20is connected with the inward concave surface31, so that the glass cover plate20can be easily deformed.

In this embodiment, the frame body11is a curved profile by rolling, that is, the frame body11is rolled to form an inner concave arc-surface, which is easy to process and low in cost. Therein, the thickness of the frame body11is kept consistent.

As shown inFIGS.1,6and7, the frame body11is provided with a first step111for supporting the glass cover plate20. A part of the surface of the glass cover plate20is abutted against the step surface of the first step111, and the end of the glass cover plate20is supported by the first step111. The above structure makes the installation of the glass cover plate20more convenient and the abutting more stable. After the glass cover plate20is placed in the first step111, the glass cover plate20is fixed through the fixing structure, which can prevent the glass cover plate20from slipping, and the first step111has a positioning function to facilitate the installation of the glass cover plate20. InFIG.1, there is a gap between the end of the glass cover plate20and the first step111. Since there is a machining error in the machining process of each component, the glass cover plate20can be smoothly installed into the frame body11by arranging the gap.

In some implementations, the inward concave surface31is provided on the step surface of the first step111. After the glass cover plate20is placed in the first step111, the inward concave of the glass cover plate20can be realized while using the first step111for positioning.

As shown inFIGS.1,2,8and9, in this embodiment, the display device further includes a plurality of fixing pieces60. Each fixing piece60is respectively connected with the inner surface of the glass cover plate20and the frame body11, whereby the fixing pieces60fix the inner surface of the glass cover plate20and the frame body11, so that the glass cover plate20is firmly fixed in the frame body11.

In some implementations, a first end of the fixing piece60is connected with the frame body11through screws, a second end of the fixing piece60is located above the first step111, and the second end of the fixing piece60is pressed on the glass cover plate20, so as to firmly fix the glass cover plate20in the frame body11.

In this embodiment, the fixing pieces60are glass pressing blocks, and each glass pressing block is evenly distributed along the length direction of the glass cover plate20, so that the glass cover plate20is stably fixed on the frame body11. It should be noted that the glass pressing blocks can also be provided on a short edge of the glass cover plate20, but the length of the long edge of the glass cover plate20is long, and the stable connection of the glass cover plate20can be better achieved by providing the glass pressing block on the long edge. When the glass cover plate20is mounted, the glass pressing block is locked by a locking screw, so that the glass cover plate20is recessed inward and fixed to the frame body11.

In some embodiments, the glass cover plate20may be bonded to the inward concave surface31. That is, the glass cover plate20is adhered in the frame body11with double-sided adhesive or liquid adhesive, so as to realize the fixed connection between the glass cover plate20and the frame body11.

In some embodiments, the frame body11includes a first mounting groove112, and the PCB assembly12is arranged in the first mounting groove112, thereby facilitating installation and protection of the PCB assembly12.

In some implementations, a wall of the first mounting groove112is provided with a slot1121and a second step1122. One end of the PCB assembly12is clamped with the slot1121, and the other end of the PCB assembly12is bonded with a step surface of the second step1122, so that the PCB assembly12is stably arranged in the first mounting groove112, thereby avoiding shaking of the PCB assembly12, and ensuring a normal operation of the touch operation.

In addition, the touch frame assembly further includes a filter bar40. In order to make the filter bar40be stably connected, the filter bar40is mounted on a notch of the first mounting groove112.

By adopting the touch frame assembly of Embodiment 1, a side of the frame body11facing away from the PCB assembly12is bent to form a depression, and the glass cover plate20is fixedly mounted on the frame body11so that the glass cover plate20is recessed inward. In some implementations, since the frame body11is fixed by a backlight module of the display device, when the glass cover plate20is fixedly connected in the frame body11, the glass cover plate20deforms along with the depression of the frame body11to realize the inward concave of the glass cover plate20, so as to prevent the glass cover plate20from blocking the infrared signal transmission of the PCB assembly12due to the convex during use, thereby ensuring a normal infrared touch operation. In addition, for the display device with the above structure, it does not need to control the inward concave of the glass cover plate20by selecting glass, which reduces the loss of glass and improves the production efficiency. Moreover, the glass cover plate20mounted on the frame body11is recessed inward by the molding operation on the whole frame body11, which is simple in structure and low in cost.

As shown inFIG.3, Embodiment 2 of the present disclosure provides a touch frame assembly. The difference between Embodiment 2 and Embodiment 1 is that in Embodiment 2, the thickness of the middle portion of the frame body11is greater than that of both ends of the frame body11, so as to form the inward concave surface31.

In this embodiment, the frame body11is provided with a machined surface for connecting the glass cover plate20. The machined surface is an inward concave surface31, which can be obtained by machining. The inward concave surface31can be an arc-shaped concave surface or a surface having step differences, so that the machined surface can be gradually depressed along its two ends to the middle. The surface of the glass cover plate20is attached to the inward concave surface31. At this time, the glass cover plate20is closely attached to the inward concave surface31, and the glass cover plate20is connected and fixed on the frame body11through the fixing piece, so that the glass cover plate20is bent inward, which makes the glass cover plate20to be recessed inward, thereby preventing the glass cover plate20from blocking the infrared signal emitted by the PCB assembly12due to its convex during use.

In this embodiment, the glass cover plate20is connected and fixed on the frame body11by a fixing piece, which is the same as the scheme in Embodiment 1, and will not be described herein.

By applying the touch frame assembly provided in this embodiment, the glass cover plate20is attached to the inward concave surface31, so that the glass cover plate20is recessed inward, thereby preventing the glass cover plate20from blocking the infrared signal transmission of the PCB assembly12due to the convex during use, and thus ensuring the normal infrared touch operation. In addition, for the display device with the above structure, it only needs to machine the inward concave surface31on the frame body11, and does not need to select glass to control the inward concave of the glass cover plate20, which can reduce the loss of glass and improve the production efficiency. Moreover, the machining cost of the inward concave surface31is low and the inward concave of the glass cover plate20is realized, and thus the structure is simple and the cost is low.

In this embodiment, the thickness of the middle portion of the frame body11is greater than that of both ends of the frame body11, that is, the inward concave surface31is formed by cutting both ends of the frame body11, thereby making the machining of the inward concave surface31of the frame body more convenient. The outer contour of the glass cover plate20is rectangular, the long edge of the glass cover plate20is connected with the inward concave surface31, and the length of the long edge of the glass cover plate20is large. Therefore, when the long edge of the glass cover plate20is connected with the inward concave surface31, it is easy to make the glass cover plate20recess inward from the middle portion.

In some implementations, the inward concave surface31is an arc-shaped concave surface, and the arc-shaped concave surface has a symmetrical structure, so that the glass cover plate20can be symmetrically recessed, which makes the glass cover plate20generate uniform concave deformation. The highest point of the arc-shaped concave surface is arranged corresponding to both ends of the glass cover plate20, that is, the highest point of the arc-shaped concave surface is two ends of the frame body11, or near the two ends of the frame body11. The lowest point of the arc-shaped concave surface is arranged corresponding to the midpoint of the long edge of the glass cover plate20, that is, the lowest point of the arc-shaped concave surface is the midpoint of the frame body11or near the midpoint of the frame body11, which further makes the glass cover plate20achieve uniform depression, and prevents the glass cover plate20from fracture due to excessive deformation of local depression.

In some implementations, a height difference between the highest point of the arc-shaped concave surface and the lowest point of the arc-shaped concave surface is H, and H has a value range of 0.5 mm-5 mm. It should be pointed out that when the value of H is too small, the bending of the glass cover plate20is not obvious. At this time, when the glass cover plate20is convex, it is easy to cause that the infrared signal is unable to be transmitted normally. When the value of H is too large, it is easy to cause fracture of the glass cover plate20. Therefore, the above value range of H is optional.

By adopting the touch frame assembly of Embodiment 2, the frame body11is provided with a machined surface for connecting the glass cover plate20. The machined surface is an inward concave surface31, and the inward concave surface31is recessed inward. A back surface of the glass cover plate20is attached to the inward concave surface31. By fixedly connecting the glass cover plate20with the frame body11through a fixing piece, the glass cover plate20is recessed inward, so as to prevent the glass cover plate20from blocking the infrared signal transmission of the PCB assembly12due to the convex during use, thereby ensuring a normal infrared touch operation. In addition, by adopting the display device with the above structure, it is only necessary to machine the frame body11to get the inward concave surface31, without selecting glass to control the concave of the glass cover plate20, which reduces the loss of glass and improves the production efficiency. Moreover, the machining cost of the inward concave surface31is low and the inward concave of the glass cover plate20is realized, and the structure is simple and the cost is low.

As shown inFIGS.4and5, Embodiment 3 of the present disclosure provides a touch frame assembly. The difference between Embodiment 3 and Embodiment 1 is that in Embodiment 3, a support pad32is provided between the glass cover plate20and the frame body11. The support pad32generates a force causing the glass cover plate20recess inward, so that the glass cover plate20recesses inward.

In this embodiment, the outer surface of the glass cover plate20faces the outer side of the display device. It should be pointed out that the PCB assembly12is provided with one-to-one corresponding infrared emission tubes201and infrared receiving tubes203, so that an infrared matrix crossing vertically and horizontally is formed on the screen. When the user touches the screen, the controller determines the specific position of the contact point on the screen, thereby achieving the infrared touch operation.

As shown inFIGS.4and5, the PCB assembly12is installed in the frame body11, and the glass cover plate20is located on the inner side of the PCB assembly12, that is, the infrared ray emitted by the infrared emission tube201is located above the outer surface of the glass cover plate20, and both ends of the glass cover plate20are fixedly connected in the frame body11. Since both ends of the glass cover plate20are fixedly connected with the frame body11, by arranging the support pad32between the frame body11and the glass cover plate20, the glass cover plate20will be deformed under the support of the support pad32, so that the glass cover plate20is recessed inward.

In this embodiment, the fixing structure includes a fixing piece60, and both ends of the fixing piece60are respectively connected to the inner surfaces of the glass cover plate20and the frame body11. In some implementations, both ends of the glass cover plate20are fixed to the frame body11through the glass pressing block, and the support pad32forms a fulcrum. The glass cover plate20is extruded by the support pad32, so that the glass cover plate20is recessed inward, so as to prevent the glass cover plate20from blocking the infrared signals sent by the PCB assembly12due to the convex during use. As shown inFIG.4, a direction of the arrow in the figure indicates the infrared signal transmission. At this time, the glass cover plate20is recessed inward, and the signal is normally transmitted, thereby ensuring normal infrared touch operation. In addition, by adopting the display device with the above structure, it is not necessary to select glass to control the concave of the glass cover plate20, which reduces the loss of glass and improves the production efficiency. Moreover, the support pad32realizes the concave of the glass cover plate20, which is simple in structure and low in cost.

In this embodiment, the outer contour of the glass cover plate20is rectangular, and a support pad32is arranged at the midpoint of the long edge of the glass cover plate20. Since the length of the long edge of the glass cover plate20is large, it is easy to make the glass cover plate20recess inward from the middle portion, and make the glass cover plate20bend symmetrically, which is not easy to cause fracture of the glass cover plate20. It should be pointed out that the support pad32may also be provided on the short edge of the glass cover plate20, but the bending effect of the glass cover plate20is not good enough and the inward-concave degree of the glass cover plate20is not enough.

In some embodiments, a plurality of support pads32may be provided, and the plurality of support pads32may be evenly spaced.

In some implementations, the support pad32is in the form of a block, and the ratio of the length of the support pad32to the length of the long edge of the glass cover plate20is a, wherein a value of a has a range of 1/8 to 1/12; the ratio of the thickness of the support pad32to the thickness of the glass cover plate20is b, wherein a value of b has a range of 1/3 to 1/4. It should be pointed out that if the length of the support pad32is too small, the glass cover plate20will be easily fractured due to partial extrusion; if the length of the support pad32is too long, the contact with the glass cover plate20will not be sufficient when the glass cover plate20is extruded, and the bending effect of the glass cover plate20will not be obvious. If the thickness of the support pad32is too small, the bending and inward concave of the glass cover plate20is not obvious; if the thickness of the support pad32is too large, the glass cover plate20is easily fractured. Therefore, a and b in the above value range are optional.

In this embodiment, the support pad32is adhered to the frame body11, so that the support pad32and the frame body11are stably connected. In other embodiments, the support pad32may also be fixed to the frame body11by other means such as fasteners, but it is more convenient and firmer to adopt the form of adhesion.

In this embodiment, the material of the support pad32is plastic or foam, so that the glass cover plate20is not easily damaged when the glass cover plate20is extruded, thereby improving the stability of the structure.

When installing the glass cover plate20, firstly, the glass pressing blocks at both ends of the glass cover plate20are extruded. At this time, the support pad32in the middle portion of the glass cover plate20is extruded to bend the glass cover plate20. Then, the glass pressing blocks in the middle portion of the glass cover plate20are locked, so that the glass cover plate20is recessed inward and fixed on the frame body11.

By adopting the touch frame assembly of Embodiment 3, both ends of the glass cover plate20are fixed to the frame body11, and the glass cover plate20is extruded by the support pad32, so that the glass cover plate20is recessed inward, thereby preventing the glass cover plate20from blocking the infrared signal transmission of the PCB assembly12due to the convex during use, and thus ensuring a normal infrared touch operation. In addition, by adopting the display device with the above structure, it is necessary to select glass to control the concave of the glass cover plate20, which reduces the loss of glass and improves the production efficiency. Moreover, the support pad32realizes the inward concave of the glass cover plate20, which is simple in structure and low in cost.

Embodiment 4 of the present disclosure provides an interactive white board, including a backlight module and the touch frame assembly provided above. The backlight module is arranged on the inner side of the touch frame assembly.

It should be noted that the terms used herein are only for describing embodiments and are not intended to limit exemplary embodiments according to the present disclosure. As used herein, the singular form is also intended to include the plural form unless the context otherwise expressly indicates, and it should also be understood that when the terms “comprise” and/or “include” are used in this description, they indicate the presence of features, steps, operations, elements, components, and/or combinations thereof.

Unless otherwise specified, the relative arrangement of components and steps, numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present disclosure. At the same time, it should be understood that, for convenience of description, the dimensions of each part shown in the drawings are not drawn according to the actual scale relationship. The technologies, methods and devices known to those skilled in the art may not be discussed in detail, but in appropriate cases, the technologies, methods and devices shall be regarded as a part of the authorization described. In all the examples shown and discussed herein, any specific value should be interpreted as merely exemplary and not as a limitation. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that similar reference numerals and letters indicate similar items in the following drawings. Therefore, once an item is defined in one drawing, it is not necessary to be further discussed in the following drawings.

In the description of the present disclosure, it should be understood that the orientation or positional relationship indicated by the orientation terms such as “front, rear, up, down, left, right,” “transverse, vertical, perpendicular, horizontal,” and “top, bottom” are generally based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the present disclosure and simplifying the description. Without any contrary description, these orientation terms do not indicate and imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the claimed scope of the present disclosure. The orientation terms such as “inside, outside” refer to the inside and outside of the contour of each component itself.

For convenience of description, spatial terms, such as “on,” “above,” “on the upper surface,” “over,” etc., can be used herein to describe the spatial positional relationship between one element or feature and other elements or features as shown in the figure. It should be understood that the spatial term is intended to include different orientations in use or operation in addition to those described in the drawings of the element. For example, if the element in the drawing is inverted, the element described as “above other elements or structures” or “on other elements or structures” will then be positioned as “below other elements or structures” or “under other elements or structures.” Thus, the exemplary term “above” may include two orientations: “above” and “below.” The element may also be positioned in other different ways (rotated by 90 degrees or in other orientations) and the spatial relative description used herein is described accordingly.

In addition, it should be noted that the terms “first” and “second” are used to define the parts, which is only for the convenience of distinguishing the corresponding parts. Unless otherwise stated, the above words have no special meaning, so they cannot be understood as limiting the claimed scope of the present disclosure.

The above description is only the preferred embodiment of the present disclosure, and is not intended to limit the present disclosure. For those skilled in the art, the present disclosure may have various changes and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present disclosure shall be included in the claimed scope of the present disclosure.