Infrared touch screen and display device

Abstract

The utility model discloses an infrared touch screen and a display device, and relates to the technical field of touch control, the infrared touch screen comprises a frame and an infrared module, the frame comprises a frame body and a pressing strip connected with the frame body, the frame body comprises a frame end wall, a frame inner side wall arranged on the outer side of the frame end wall and a frame outer side wall arranged on the inner side of the frame end wall, and the infrared module is arranged on the frame outer side wall. The frame end wall, the frame inner side wall and the frame outer side wall jointly define a containing cavity, the frame outer side wall encircles a window opening, and the frame inner side wall and the frame outer side wall are spaced to form a mounting opening; the infrared module can be installed in the containing cavity from the installation opening, and the pressing strip is connected with the infrared module in a pressing mode. The infrared module can emit infrared rays towards the window. According to the utility model, the frame inner side wall and the frame outer side wall are arranged at intervals to form the mounting port with a larger width size, so that the infrared module can be directly arranged in the accommodating cavity from the mounting port, and the pressing strip is connected with the infrared module in a pressing manner, so that the infrared module does not need to be inserted from the end part of the frame, and the mounting difficulty of the infrared module is further reduced.

Description

Technical Field

[0001] The utility model relates to the field of touch technology, in particular to an infrared touch screen and a display device. Background Art

[0002] Infrared touch technology is an on-screen touch technology that places an infrared module on the edge of the screen. The conventional assembly method is to install the infrared module in the cavity of the profile frame.

[0003] The profile frame has an opening for the infrared module's light to exit the cavity. Typically, the profile frame has a crimping portion at the edge of the opening to press against the infrared module, securing it within the cavity. Because the opening's width is smaller than the infrared module's, the infrared module can't be directly inserted into the cavity through the opening. Instead, it must be slid into the cavity from the end of the profile frame, making installation more difficult. Utility Model Content

[0004] The main purpose of the utility model is to provide an infrared touch screen and display device, aiming to reduce the difficulty of installing the infrared module.

[0005] To achieve the above objectives, the infrared touch screen proposed in this utility model includes:

[0006] A frame, comprising a frame body and a press strip connected to the frame body, the frame body comprising a frame end wall, a frame inner side wall provided on the outer side of the frame end wall, and a frame outer side wall provided on the inner side of the frame end wall, the frame end wall, the frame inner side wall, and the frame outer side wall jointly defining a receiving cavity, the frame outer side wall enclosing a viewing window, and a mounting opening formed between the frame inner side wall and the frame outer side wall; and

[0007] The infrared module can be installed into the accommodating cavity from the installation opening, and the pressure strip is pressed against the infrared module; the infrared module can emit infrared rays toward the viewing window.

[0008] In one embodiment, the pressure strip includes a mounting portion and a crimping portion connected to each other, the mounting portion is connected to the frame body, the infrared module includes a circuit board and a light-emitting unit provided on the circuit board, and the crimping portion abuts against the circuit board.

[0009] In one embodiment, the light-emitting unit is arranged on the side of the circuit board close to the viewing window, the mounting portion is connected to the inner side wall of the frame, the crimping portion abuts against the side of the circuit board close to the viewing window, and is separated from the outer side wall of the frame to form a light output channel, and the infrared rays emitted by the light-emitting unit can pass through the light output channel to reach the viewing window.

[0010] In one embodiment, the mounting portion is fixed to the inner side wall of the frame by screws.

[0011] In one embodiment, one of the mounting portion and the inner side wall of the frame is provided with a positioning protrusion, and the other is provided with a positioning groove, and the positioning protrusion is positioned and clamped in the positioning groove.

[0012] In one embodiment, the inner wall surface of the outer side wall of the frame is provided with a first step surface, and the inner side wall of the frame is correspondingly provided with a second step surface, and the opposite sides of the side of the circuit board away from the viewing window are respectively abutted against the first step surface and the second step surface.

[0013] In one embodiment, the infrared touch screen further includes a filter bar, and the filter bar is provided in the light output channel.

[0014] In one embodiment, the pressure strip further includes a connecting portion connected between the mounting portion and the crimping portion, and a mounting flange extends inward from the side edge of the outer side wall of the frame away from the frame end wall, the mounting flange and the connecting portion are spaced apart along the first direction, and a portion of the light output channel is formed at the interval between the mounting flange and the connecting portion; the filter strip has a first side surface and a second side surface opposite to each other in the first direction, the first side surface abuts against the inner side surface of the mounting flange, and the second side surface abuts against the side surface of the connecting portion away from the circuit board.

[0015] In one embodiment, the filter strip is provided with a notch groove on the second side surface, the side wall of the notch groove is arranged to intersect with the second side surface and abut against the side surface of the connecting portion away from the mounting portion, and the bottom surface of the notch groove abuts against the side wall surface of the connecting portion away from the circuit board.

[0016] In one embodiment, the side surface of the filter strip away from the connecting portion is adhesively fixed to the inner side surface of the outer side wall of the frame.

[0017] In one embodiment, the pressure strip further includes a connecting portion connected between the mounting portion and the crimping portion, the connecting portion being arranged to intersect with the mounting portion, the connecting portion extending the crimping portion toward the circuit board at a side edge away from the mounting portion, and the crimping portion elastically abuts against the circuit board.

[0018] In one embodiment, the infrared touch screen further includes a display module, which is exposed in the viewing window. A glue filling groove is provided on a side of the connecting portion facing away from the circuit board, and the glue filling groove is provided with adhesive to bond and fix the display module.

[0019] In one embodiment, the frame body and the pressure strip are made of metal.

[0020] The present invention also provides a display device, comprising the aforementioned infrared touch screen.

[0021] The technical solution of the present invention forms a mounting opening with a larger width by separating the inner side wall and the outer side wall of the frame, so that the infrared module can be directly installed into the accommodating cavity from the mounting opening, and the pressure strip is pressed against the infrared module, thereby eliminating the need to insert the infrared module from the end of the frame, thereby reducing the difficulty of installing the infrared module. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0023] Figure 1 This is a structural diagram of an embodiment of the infrared touch screen provided by the present utility model;

[0024] Figure 2 for Figure 1 Schematic diagram of the structure of the middle frame body;

[0025] Figure 3 for Figure 1 Schematic diagram of the structure of the middle layer;

[0026] Figure 4 for Figure 1 Schematic diagram of the structure of the filter strip.

[0027] Description of Figure Numbers:

[0028] 10. Infrared touch screen; 100. Frame; 200. Infrared module; 300. Filter strip; 400. Display module; 500. Screw; 110. Frame body; 111. Frame end wall; 112. Frame inner side wall; 113. Frame outer side wall; 114. Mounting flange; 115. Accommodating cavity; 116. Mounting opening; 117. Positioning groove; 118a. First step surface; 118b. Second step surface; 119. Third step surface; 120. Pressing strip; 121. Mounting portion; 122. Pressing portion; 123. Connecting portion; 124. Positioning protrusion; 125. Glue filling groove; 210. Circuit board; 220. Light-emitting unit; 310. First side surface; 320. Second side surface; 330. Notch groove; 331. Groove side wall; 332. Groove bottom surface.

[0029] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0031] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0032] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited to "first" and "second" may explicitly or implicitly include at least one of such features. In addition, if "and / or" or "and / or" appears in the full text, its meaning includes three parallel schemes. Taking "A and / or B" as an example, it includes scheme A, or scheme B, or a scheme in which A and B are satisfied at the same time. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0033] The present invention provides an infrared touch screen 10 .

[0034] The infrared touch screen 10 is a display screen that uses infrared technology to detect user touch operations. The infrared touch screen 10 forms a detection area composed of infrared rays by arranging infrared transmitters and infrared receivers around the screen. When the user's finger or an object such as a stylus touches or approaches the screen, it blocks some of the infrared rays, and the infrared receiver cannot receive the infrared rays emitted by the infrared transmitter. The system determines the location of the touch point by detecting these blocked infrared rays and performs corresponding processing. The infrared touch screen 10 includes a frame 100 and an infrared module 200. The frame 100 is used to fix the entire infrared touch screen 10 and provide structural support. The infrared module 200 can emit infrared rays, receive infrared signals, process the received signals, and convert these signals into user interface operation instructions. Since touch is detected by infrared rays, a response can be triggered without directly contacting the screen surface. The infrared touch screen 10 generally has a high degree of transparency and does not affect the display quality. Compared with other types of touch technologies (such as capacitive or resistive), the infrared touch screen 10 is less expensive. The infrared touch screen 10 can be applied to various occasions or display devices, such as self-service terminals, information query machines, electronic whiteboards, etc.

[0035] See also Figure 1 and Figure 2 In one embodiment of the present invention, the infrared touch screen 10 includes a frame 100 and an infrared module 200. The frame 100 includes a frame body 110 and a pressure strip 120 connected to the frame body 110. The frame body 110 includes a frame end wall 111, a frame inner side wall 112 provided on the outer side of the frame end wall 111, and a frame outer side wall 113 provided on the inner side of the frame end wall 111. The frame end wall 111, the frame inner side wall 112, and the frame outer side wall 113 jointly define a accommodating cavity 115. The frame outer side wall 113 encloses a viewing window. An installation opening 116 is formed between the frame inner side wall 112 and the frame outer side wall 113. The infrared module 200 can be installed in the accommodating cavity 115 from the installation opening 116, and the pressure strip 120 is pressed against the infrared module 200. The infrared module 200 can emit infrared rays toward the viewing window.

[0036] Specifically, the frame body 110 includes a frame end wall 111, a frame inner side wall 112, and a frame outer side wall 113. The frame end wall 111, the frame inner side wall 112, and the frame outer side wall 113 collectively define a receiving cavity 115. The receiving cavity 115 is annular. The frame 100 can be a square frame, a round frame, or other polygonal frame 100. Correspondingly, the receiving cavity 115 is square ring-shaped, circular ring-shaped, or other polygonal ring-shaped. The frame inner side wall 112 and the frame outer side wall 113 are separated by a mounting opening 116. The width of the mounting opening 116 is substantially the same as the width of the receiving cavity 115, which is the distance from the frame inner side wall 112 to the frame outer side wall 113. The distance between the outer sidewall 113 and the inner sidewall 112 is greater than the distance between the inner sidewall 112 and the outer sidewall 113. That is, the height of the outer sidewall 113 is greater than the height of the inner sidewall 112. The outer sidewall 113 defines a viewing window for mounting a display panel. The viewing window is located on the side of the mounting opening 116 away from the end wall 111. The infrared module 200 can emit infrared rays toward the viewing window to form a detection area in the viewing window.

[0037] In the traditional method of inserting the infrared module into the accommodating cavity from the end of the frame, the infrared module is prone to interference and friction with the inner wall of the accommodating cavity; since the traditional accommodating cavity is relatively closed, it is difficult to visually observe its internal conditions, making it difficult to determine whether the infrared module is installed in place; after the infrared module is installed, the end of the frame needs to be welded, which is not only troublesome to operate, but the heat generated during welding may also damage the infrared module.

[0038] Therefore, the mounting opening 116 of the infrared touch screen 10 proposed in the present invention has a larger width, allowing the infrared module 200 to be directly installed into the accommodating cavity 115 through the mounting opening 116. This eliminates the traditional installation method of inserting the infrared module 200 from the end of the frame 100 into the accommodating cavity 115. Instead, the mounting opening 116 formed by the inner sidewall 112 and the outer sidewall 113 of the frame is directly installed into the accommodating cavity 115, thereby reducing the difficulty of installing the infrared module 200. At the same time, the pressure strip 120 presses the infrared module 200 to confine the infrared module 200 to the accommodating cavity 115, preventing the infrared module 200 from moving within the accommodating cavity 115 or slipping out of the accommodating cavity 115, thereby ensuring the stability and reliability of the installation of the infrared module 200 and the frame 100.

[0039] The technical solution of the present invention forms a mounting opening 116 with a larger width by separating the inner side wall 112 and the outer side wall 113 of the frame, so that the infrared module 200 can be directly installed into the accommodating cavity 115 from the mounting opening 116, and the pressure strip 120 is crimped to the infrared module 200, thereby eliminating the need to insert the infrared module 200 from the end of the frame 100, thereby reducing the difficulty of installing the infrared module 200.

[0040] In one embodiment, see Figure 1 and Figure 3 The pressure strip 120 includes a mounting portion 121 and a crimping portion 122 connected to each other. The mounting portion 121 is connected to the frame body 110 . The infrared module 200 includes a circuit board 210 and a light-emitting unit 220 provided on the circuit board 210 . The crimping portion 122 abuts against the circuit board 210 .

[0041] The infrared module 200 includes a circuit board 210 and a light-emitting unit 220. The circuit board 210 is the base for supporting electronic components and is responsible for controlling the emission of infrared signals. The light-emitting unit 220 is mounted on the circuit board 210 and is used to emit infrared rays. The pressure strip 120 includes a mounting portion 121 and a crimping portion 122. The mounting portion 121 is responsible for securing the pressure strip 120 to the frame body 110. The crimping portion 122 is used to crimp the circuit board 210 after the infrared module 200 is installed in the accommodating cavity 115, ensuring that the infrared module 200 is stably installed in the accommodating cavity 115 and preventing it from loosening due to external impact or vibration.

[0042] In one embodiment, see Figure 1 The light-emitting unit 220 is arranged on the side of the circuit board 210 close to the viewing window, the mounting portion 121 is connected to the inner side wall 112 of the frame, the crimping portion 122 abuts against the side of the circuit board 210 close to the viewing window, and is separated from the outer side wall 113 of the frame to form a light-emitting channel. The infrared rays emitted by the light-emitting unit 220 can pass through the light-emitting channel to reach the viewing window.

[0043] When the mounting portion 121 is connected to the inner side wall 112 of the frame, the crimping portion 122 can abut against the side of the circuit board 210 near the viewing window from the mounting port 116 to ensure that the circuit board 210 is firmly installed in the accommodating cavity 115. A light-emitting channel is formed between the crimping portion 122 and the outer side wall 113 of the frame. The light-emitting unit 220 is arranged on the side of the circuit board 210 near the viewing window, so that the position of the light-emitting unit 220 is closer to the viewing window. At the same time, the infrared rays emitted by the light-emitting unit 220 can pass through the light-emitting channel to reach the viewing window. The infrared rays can be evenly distributed around the viewing window to form an effective detection network for capturing the user's touch actions. The light-emitting channel ensures the effective propagation of infrared rays, reduces the loss of light, and enhances the sensitivity of touch detection.

[0044] In other embodiments, the mounting portion 121 may also be connected to the frame outer sidewall 113 and / or the frame end wall 111 , or connected to at least two of the frame end wall 111 , the frame inner sidewall 112 , and the frame outer sidewall 113 .

[0045] In one embodiment, see Figure 1 The mounting portion 121 is fixed to the inner side wall 112 of the frame by screws 500 .

[0046] Using screws 500 to secure mounting portion 121 to frame inner sidewall 112 creates a removable connection between holddown 120 and frame body 110. This also increases the stability of the connection between holddown 120 and frame body 110, ensuring that infrared module 200 is not displaced by external factors (such as vibration) during use. Using screws 500 to secure the infrared module 200 allows for quick and easy removal and reinstallation when maintenance or replacement is required.

[0047] In other embodiments, the mounting portion 121 and the inner side wall 112 of the frame may also be connected by welding, snap connection, magnetic connection, bonding, or other connection methods.

[0048] In one embodiment, see Figures 1 to 3 The mounting portion 121 is provided with a positioning protrusion 124 , and the inner side wall 112 of the frame is provided with a positioning groove 117 , and the positioning protrusion 124 is positioned and clamped in the positioning groove 117 .

[0049] During installation, the positioning protrusion 124 on the mounting portion 121 can be aligned with the positioning groove 117 on the inner side wall 112 of the frame to achieve preliminary positioning between the mounting portion 121 and the inner side wall 112 of the frame. The mounting portion 121 can then be fixed to the inner side wall 112 of the frame using screws 500 to ensure a secure installation of the pressure strip 120. The design of the positioning protrusion 124 and the positioning groove 117 ensures precise alignment between the mounting portion 121 and the inner side wall 112 of the frame, avoiding deviation during installation, improving the manufacturing accuracy and assembly efficiency of the infrared touch screen 10, and enhancing the stability of the overall structure.

[0050] In another embodiment, the mounting portion 121 is provided with a positioning groove 117 , and the inner side wall 112 of the frame is provided with a positioning protrusion 124 , which is positioned and clamped in the positioning groove 117 .

[0051] In other embodiments, one of the mounting portion 121 and the frame inner sidewall 112 is provided with a magnet, and the other is provided with a metal piece, and the magnet and the metal piece are magnetically connected to achieve rapid positioning of the mounting portion 121 and the frame inner sidewall 112.

[0052] In one embodiment, see Figure 1 and Figure 2The inner wall surface of the outer side wall 113 of the frame is provided with a first step surface 118a, and the inner side wall 112 of the frame is correspondingly provided with a second step surface 118b. The opposite sides of the side of the circuit board 210 away from the viewing window are respectively abutted against the first step surface 118a and the second step surface 118b.

[0053] A first boss protrudes from the inner wall surface of the outer side wall 113 of the frame, and a first step surface 118a is formed on the side of the first boss facing the window area opening; a second boss protrudes from the inner wall surface of the inner side wall 112 of the frame, and a second step surface 118b is formed on the side of the second boss facing the window area opening; or the accommodating cavity 115 includes two cavities with different widths, and the connection between the two cavities forms a first step surface 118a on the outer side wall 113 of the frame and a second step surface 118b on the inner side wall 112 of the frame.

[0054] The circuit board 210 can be firmly installed in the frame body 110 by abutting the first step surface 118a and the second step surface 118b respectively, reducing the displacement caused by changes in the external environment; it helps to accurately align the circuit board 210, ensuring that the infrared rays can be accurately emitted from the preset light output channel to the viewing window; it simplifies the installation process of the infrared module 200, making it easier to align the various components of the infrared module 200 during installation; when the circuit board 210 needs to be replaced or inspected, the infrared module 200 can be easily removed from the two step surfaces for maintenance or replacement; the circuit board 210 is suspended above the bottom of the accommodating cavity 115, which can disperse the pressure of the crimping portion 122 on the circuit board 210, avoiding damage to the circuit board 210 caused by single-point force on the circuit board 210.

[0055] In one embodiment, see Figure 1 The infrared touch screen 10 further includes a filter bar 300 , which is disposed in the light output channel.

[0056] The filter strip 300 filters out stray light in the environment, allowing only infrared light of a specific wavelength to pass through. This reduces the impact of ambient light on infrared detection, improves touch recognition accuracy, and enhances the contrast of infrared light in the detection area, making touch point detection clearer and more reliable. The filter strip 300 is located in the light exit channel between the crimping portion 122 and the outer frame wall 113. It ensures that all infrared light passing through the light exit channel is screened by the filter strip 300. The infrared light is filtered as it passes through the light exit channel, ensuring that only infrared light that meets the requirements reaches the viewing window area.

[0057] Infrared light emitted by the light-emitting unit 220 in the infrared module 200 passes through the filter strip 300 and is reflected within the filter strip 300. This reflected infrared light covers the viewing window, allowing infrared signal transmission to form a touch detection area on the viewing window. The filter strip 300 can be made of optical glass or organic glass, and may have a specific coating or coating added to its surface to achieve better filtering effects.

[0058] In one embodiment, see Figure 1 and Figure 3 The pressure strip 120 also includes a connecting portion 123 connected between the mounting portion 121 and the crimping portion 122. The side edge of the outer frame side wall 113 away from the frame end wall 111 extends inward to form a mounting flange 114. The mounting flange 114 and the connecting portion 123 are spaced apart along the first direction, and a portion of the light output channel is formed at the interval between the mounting flange 114 and the connecting portion 123. The filter strip 300 has a first side surface 310 and a second side surface 320 opposite to each other in the first direction. The first side surface 310 abuts against the inner side surface of the mounting flange 114, and the second side surface 320 abuts against the side of the connecting portion 123 away from the circuit board 210.

[0059] The pressure strip 120 includes a mounting portion 121, a connecting portion 123, and a crimping portion 122, which are sequentially connected. The mounting portion 121 is used to connect to the inner sidewall 112 of the frame to ensure a stable connection between the pressure strip 120 and the frame body 110. The crimping portion 122 is used to abut the side of the circuit board 210 near the viewing window to ensure crimping of the pressure strip 120 to the infrared module 200. The connecting portion 123 connects the mounting portion 121 and the crimping portion 122, acting as a transition. The mounting flange 114 and the connecting portion 123 are spaced apart along a first direction to form a portion of the light output channel. The mounting flange 114 abuts the first side 310 of the filter strip 300, while the side of the connecting portion 123 facing away from the circuit board 210 abuts the second side 320 of the filter strip 300. The mounting flange 114 and the connecting portion 123 jointly support the filter strip 300 in the first direction to secure its position in the light output channel. The connecting portion 123 provides support for the filter bar 300 to fix the filter bar 300 ; conversely, the reaction force of the filter bar 300 on the connecting portion 123 is transmitted to the crimping portion 122 and acts on the circuit board 210 , further improving the stability of the crimping of the crimping portion 122 on the circuit board 210 .

[0060] In other embodiments, the connecting portion 123 may not be provided, and the pressure strip 120 may be in a plate-shaped or block-shaped shape. A portion of the pressure strip 120 is connected to the end surface of the inner side wall 112 of the frame away from the frame end wall 111, and one side surface of the other portion of the pressure strip 120 is pressed against the circuit board 210, and the other side surface abuts against the filter strip 300.

[0061] In one embodiment, see Figure 1 and Figure 4 The filter strip 300 is provided with a notch groove 330 on the second side surface 320 . The groove sidewall 331 of the notch groove 330 is arranged to intersect with the second side surface 320 and abut against the side surface of the connecting portion 123 away from the mounting portion 121 . The groove bottom surface 332 of the notch groove 330 abuts against the side wall surface of the connecting portion 123 away from the circuit board 210 .

[0062] The connecting portion 123 can be quickly snapped into the notch 330, achieving close contact between the notch 330 and the connecting portion 123, ensuring precise and rapid positioning of the filter bar 300 during installation. This simplifies the installation and removal of the filter bar 300 and improves the convenience of installing and replacing the filter bar 300. The sidewall of the connecting portion 123 facing away from the circuit board 210 abuts the bottom surface 332 of the notch 330 along a first direction, while the side surface of the connecting portion 123 facing away from the mounting portion 121 abuts the sidewall 331 of the notch 330 along a second direction. By abutting the filter bar 300 in two intersecting directions, the connecting portion 123 provides good support for the filter bar 300 in both directions. At the same time, the mounting flange 114 transmits the force to the connecting portion 123 through the filter strip 300, and then acts on the circuit board 210 through the pressing portion 122, thereby enhancing the pressing effect on the circuit board 210, thereby enhancing the structural stability and reliability among the filter strip 300, the pressing strip 120 and the circuit board 210.

[0063] In other embodiments, the connecting portion 123 may also directly abut the second side surface 320 of the filter bar 300, or abut the side surface adjacent to the second side surface 320; or there may be no contact between the pressing strip 120 and the filter bar 300, and the filter bar 300 may be fixed to the outer frame wall 113 by bonding.

[0064] In one embodiment, see Figure 1 The side surface of the filter strip 300 away from the connecting portion 123 is bonded and fixed to the inner side surface of the outer frame wall 113 .

[0065] The filter bar 300 abuts the connecting portion 123 via the notch 330, providing good support for the filter bar 300 in both the first and second directions. Adhesion is applied to the side of the filter bar 300, away from the connecting portion 123, further enhancing the stability of the filter bar 300 during installation. This strengthens the connection between the filter bar 300 and the connecting portion 123, and further improves the stability of the holding strip 120 against the circuit board 210. Adhesion simplifies the securing process during installation, improving installation efficiency.

[0066] Furthermore, a third stepped surface 119 is formed on the inner side surface of the outer frame side wall 113. The side surface of the filter bar 300 close to the circuit board 210 abuts against the third stepped surface 119. The third stepped surface 119 provides support for the filter bar 300 in the first direction. At the same time, the third stepped surface 119 provides positioning and support for the filter bar 300 when installing the filter bar 300, thereby improving the installation efficiency of the filter bar 300.

[0067] In other embodiments, the side of the filter strip 300 away from the circuit board 210 is bonded and fixed to the inner side of the mounting flange 114 .

[0068] In one embodiment, see Figure 1 and Figure 3 The pressure strip 120 also includes a connecting portion 123 connected between the mounting portion 121 and the crimping portion 122. The connecting portion 123 is arranged to intersect with the mounting portion 121. The connecting portion 123 extends a crimping portion 122 toward the circuit board 210 at a side edge away from the mounting portion 121, and the crimping portion 122 elastically abuts against the circuit board 210.

[0069] The crimping portion 122 extends from the side edge of the connecting portion 123 away from the mounting portion 121 toward the circuit board 210. There is a certain distance between the connecting portion 123 and the circuit board 210. The crimping portion 122 has a certain elasticity and can be slightly bent or deformed in the gap between the connecting portion 123 and the circuit board 210 to adapt to the slight deformation or displacement that may occur in the circuit board 210, ensuring that it can be close to the circuit board 210, providing stable contact pressure, and reducing displacement caused by external factors (such as vibration or temperature changes). At the same time, the elastic contact can absorb the stress generated by the circuit board 210 due to thermal expansion and contraction, etc., and protect the circuit board 210 from damage. The crimping portion 122 can be configured as an elastic pressure arm, or the crimping portion 122 can be made of elastic material, or an elastic layer can be provided on the side of the crimping portion 122 that abuts the circuit board 210.

[0070] In one embodiment, see Figure 1 and Figure 3 The infrared touch screen 10 further includes a display module 400 , which is exposed in the viewing window. A glue filling groove 125 is recessed on the side of the connecting portion 123 facing away from the circuit board 210 , and the glue filling groove 125 is provided with an adhesive to bond and fix the display module 400 .

[0071] The frame 100 is arranged around the periphery of the display module 400 so that the display module 400 is exposed in the viewing window. After the infrared light emitted by the infrared module 200 is reflected by the filter strip 300, a detection area is formed on a plane parallel to the display module 400. A glue filling groove 125 is provided on the side of the connecting portion 123 facing away from the circuit board 210. The glue filling groove 125 is provided with an adhesive. The display module 400 is fixed to the connecting portion 123 via the adhesive in the glue filling groove 125, thereby achieving a stable connection between the display module 400 and the frame 100 and ensuring the stable position of the display module 400. The adhesive not only fixes the display module 400, but also provides a certain sealing effect, preventing dust and moisture from entering the accommodating cavity 115 and affecting the infrared module 200. The provision of the glue filling groove 125 can prevent the fluid adhesive from flowing around during the bonding process, causing contamination of the frame 100 and the display module 400 and wasting adhesive.

[0072] In other embodiments, the connecting portion 123 and the display module 400 may also be bonded using double-sided tape or other solid adhesive; the display module 400 and the frame 100 may also be connected magnetically, connected with fasteners, welded, etc.

[0073] In one embodiment, the frame body 110 and the pressing strip 120 are made of metal.

[0074] The frame 110 and the bead 120 are made of metal, such as aluminum alloy, stainless steel, or other metal materials with good strength and rigidity. The bead 120 can be made of the same material as the frame 110 to ensure consistency and coordination of the overall structure; different materials can also be used to enhance the product's appearance based on the design style.

[0075] Metal materials have high strength and rigidity, which can provide better structural support and ensure that the entire infrared touch screen 10 does not deform easily when subjected to external impact or pressure; metal has good thermal conductivity, which can help the circuit board 210 and other electronic components dissipate heat and extend the service life of the equipment; metal materials have electromagnetic shielding effects, which can reduce the impact of external electromagnetic interference on the infrared touch screen 10 and improve the stability of the system; depending on the selected metal material, materials with certain corrosion resistance can be selected, such as stainless steel or surface-treated aluminum alloy, to increase the service life of the equipment in harsh environments; metal materials are easy to process and can be processed using a variety of processes such as stamping, cutting, and bending, which facilitates manufacturing and assembly; metal materials have a good appearance texture and can be made to have a good visual effect through surface treatment processes such as spraying and anodizing.

[0076] In other embodiments, the frame body 110 and the pressure strip 120 may also be made of non-metallic materials with high strength and rigidity, such as carbon fiber composites, glass fiber reinforced plastics, aramid fiber composites, polyimide, polyetheretherketone, epoxy resin, polycarbonate, graphene reinforced composites, etc.

[0077] The present invention also proposes a display device, which includes an infrared touch screen 10. The specific structure of the infrared touch screen 10 refers to the above embodiment. Since the present display device adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought by the technical solutions of the above embodiments, which will not be described one by one here.

[0078] The above description is merely an exemplary embodiment of the present invention and does not limit the patent scope of the present invention. All equivalent structural transformations made using the contents of the present invention specification and drawings under the technical concept of the present invention, or direct / indirect application in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. An infrared touch screen, characterized in that: include: A frame, comprising a frame body and a press strip connected to the frame body, the frame body comprising a frame end wall, a frame inner side wall provided on the outer side of the frame end wall, and a frame outer side wall provided on the inner side of the frame end wall, the frame end wall, the frame inner side wall, and the frame outer side wall jointly defining a receiving cavity, the frame outer side wall enclosing a viewing window, and a mounting opening formed between the frame inner side wall and the frame outer side wall; and The infrared module can be installed into the accommodating cavity from the installation opening, and the pressure strip is pressed against the infrared module; the infrared module can emit infrared rays toward the viewing window.

2. The infrared touch screen according to claim 1, wherein: The pressure strip includes a mounting portion and a pressing portion connected to each other, the mounting portion is connected to the frame body, the infrared module includes a circuit board and a light emitting unit provided on the circuit board, and the pressing portion abuts against the circuit board.

3. The infrared touch screen according to claim 2, wherein: The light-emitting unit is arranged on the side of the circuit board close to the viewing window, the mounting portion is connected to the inner side wall of the frame, the crimping portion abuts against the side of the circuit board close to the viewing window, and is separated from the outer side wall of the frame to form a light output channel, and the infrared rays emitted by the light-emitting unit can pass through the light output channel to reach the viewing window.

4. The infrared touch screen according to claim 3, wherein: The mounting portion is fixed to the inner side wall of the frame by screws; And / or, one of the mounting portion and the inner side wall of the frame is provided with a positioning protrusion, and the other is provided with a positioning groove, and the positioning protrusion is positioned and clamped in the positioning groove; And / or, the inner wall surface of the outer side wall of the frame is provided with a first step surface, and the inner side wall of the frame is correspondingly provided with a second step surface, and the opposite sides of the side of the circuit board away from the viewing window are respectively abutted against the first step surface and the second step surface.

5. The infrared touch screen according to claim 3, wherein: The infrared touch screen further includes a filter bar, which is arranged in the light output channel.

6. The infrared touch screen according to claim 5, characterized in that: The pressure strip also includes a connecting portion connected between the mounting portion and the crimping portion, and a mounting flange extends inward from the side edge of the outer side wall of the frame away from the frame end wall, the mounting flange and the connecting portion are spaced apart along the first direction, and a portion of the light output channel is formed at the interval between the mounting flange and the connecting portion; the filter strip has a first side surface and a second side surface opposite to each other in the first direction, the first side surface abuts against the inner side surface of the mounting flange, and the second side surface abuts against the side surface of the connecting portion away from the circuit board.

7. The infrared touch screen according to claim 6, wherein: The filter strip is provided with a notch on the second side surface, a sidewall of the notch intersecting the second side surface and abutting against a side surface of the connecting portion away from the mounting portion, and a bottom surface of the notch abutting against a sidewall surface of the connecting portion away from the circuit board; And / or, the side surface of the filter strip away from the connecting portion is adhesively fixed to the inner side surface of the outer side wall of the frame.

8. The infrared touch screen according to claim 2, wherein: The pressure strip also includes a connecting portion connected between the mounting portion and the crimping portion, the connecting portion is arranged to intersect with the mounting portion, the connecting portion extends the crimping portion toward the circuit board at a side edge away from the mounting portion, and the crimping portion elastically abuts against the circuit board.

9. The infrared touch screen according to claim 8, wherein: The infrared touch screen further includes a display module, the display module is exposed in the viewing window, a glue filling groove is recessed on a side of the connecting portion facing away from the circuit board, and the glue filling groove is provided with adhesive for bonding and fixing the display module; And / or, the frame body and the pressure strip are made of metal.

10. A display device, characterized in that: It comprises the infrared touch screen as described in any one of claims 1 to 9.

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