CN211106587U

CN211106587U - Infrared touch screen frame structure, infrared touch screen and wisdom blackboard

Info

Publication number: CN211106587U
Application number: CN201921986042.1U
Authority: CN
Inventors: 王敏; 汪海祥
Original assignee: Jiangsu Odin Electronic Technology Co ltd
Current assignee: Jiangsu Odin Electronic Technology Co ltd
Priority date: 2019-11-18
Filing date: 2019-11-18
Publication date: 2020-07-28
Anticipated expiration: 2029-11-18

Abstract

The utility model discloses an infrared touch screen frame structure, infrared touch screen and wisdom blackboard belongs to teaching equipment technical field. The upper frame and the side frames of the infrared touch screen frame structure of the utility model are connected through the upper corner brace, and the lower frame and the side frames are connected through the lower corner brace; go up frame, lower frame and side frame and seted up lamp strip groove, filter strip groove and glass plate groove in, the filter strip groove is located the lamp strip groove outside. When the lamp strips and the filter strips are overhauled or replaced, the corresponding frames and the corner connectors on the two sides of the frames are only needed to be detached, and then the lamp strips and the filter strips in the frames are directly taken out, so that the overhauling and replacing efficiency is greatly improved. The utility model discloses an infrared touch screen and wisdom blackboard can not produce the piece between infrared touch screen and the clipboard, comparatively levels between the glass board face of infrared touch screen and the clipboard face, facilitates the use.

Description

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

Technical Field

The utility model relates to an infrared touch-control display device technical field, more specifically say, relate to an infrared touch-control screen frame structure, infrared touch-control screen and wisdom blackboard.

Background

With the increasing popularization and importance of electronic intelligent products, the education industry is also undergoing deep technical changes. Under the influence of the intelligentized trend of teaching tools, the intelligent blackboard is popularized in most teaching environments, and the corners of the head are gradually exposed. In the design and production use process of the intelligent blackboard, a large-size touch display device is generally used as a main screen, and two writing boards are used as auxiliary screens and arranged on two sides of the main screen. Large-sized touch display devices generally include capacitive touch screens and infrared touch screens.

Wherein, when assembling solitary screen, install the back with the frame, often fix glass on the section bar surface of frame through sticky mode, this makes in glass's the installation, the inaccurate problem of glass bonding location appears easily, and is inconvenient in the installation, and can lead to main screen and about can't realize seamless concatenation when vice screen splices, influence the use of wisdom blackboard. Therefore, for the assembly of the capacitive touch screen, a plurality of grooves for fixing the glass plate, the display plate and the membrane can be formed in the frame, so that the display plate and the frame are better in fit, and the processing efficiency is improved, for example, the invention and creation of the Chinese patent document named as an intelligent blackboard frame structure and an intelligent blackboard (with the application number of 201721479694) are facilitated.

However, it is worth pointing out that, different from the capacitive touch screen, infrared touch screen is in the use, and its infrared module that is used for realizing touch operation takes place to damage easily, needs to carry out regular maintenance and change to the lamp strip of infrared module. Therefore, the mode of fixing the glass frame by gluing causes that the gluing structure needs to be damaged when the lamp strip is maintained and disassembled, and then the lamp strip is maintained and replaced, which brings great inconvenience to maintenance personnel; adopt the mode of integral type frame section bar, need demolish multilayer subassembly in proper order during the maintenance, efficiency is very low, also leads to monoblock glass board curtain to scrap easily when the operation difficulty.

SUMMERY OF THE UTILITY MODEL

1. Technical problem to be solved by the utility model

The utility model aims to overcome the not enough of the difficult change of lamp strip of the infrared touch screen of wisdom blackboard among the prior art, provide an infrared touch screen frame structure, through set up the groove that is used for installing fixed lamp strip and light filtering strip in last frame, lower frame, side frame, only need demolish the angle sign indicating number when maintenance or change, can take out lamp strip or light filtering strip, efficient, convenient operation.

Another object of the utility model is to provide an infrared touch screen to and contain the wisdom blackboard of this infrared touch screen, lamp strip and filter strip wherein are convenient for change, and change the damage that can avoid the glass board in-process.

2. Technical scheme

In order to achieve the above purpose, the utility model provides a technical scheme does:

the utility model discloses a frame structure of an infrared touch screen, which comprises a lower frame, an upper frame and two side frames arranged between the lower frame and the upper frame; the side frame and the lower frame are detachably connected through a lower corner code, and the side frame and the upper frame are detachably connected through an upper corner code; the lower frame, the upper frame and the side frame are provided with a light bar groove for fixing a light bar, a light filtering bar groove for fixing a light filtering bar and a glass plate groove for fixing a glass plate, and the light filtering bar groove is positioned on the outer side of the light bar groove.

Further, the light bar groove and the filter groove are respectively disposed on a vertical portion and a horizontal portion of a groove body formed in an approximately L shape.

Further, the filter strip groove is located at the notch of the groove body.

Furthermore, mounting grooves which are staggered with each other are formed in two opposite groove walls of the filter strip groove, the side edge of the filter strip is clamped and embedded in the mounting grooves, and the filter strip is obliquely arranged.

Furthermore, two opposite groove walls of the lamp strip groove are provided with limiting grooves, and the limiting grooves are used for clamping and embedding lugs of the lamp strip.

Furthermore, at least one of the two opposite groove walls of the light bar groove is provided with an avoiding groove, and a disassembly gap is formed between the groove bottom of the avoiding groove and the light bar.

Furthermore, the lamp strips fixed in the lamp strip grooves of the lower frame are infrared emission lamp strips, and the lamp strips fixed in the lamp strip grooves of the upper frame are infrared absorption lamp strips.

Furthermore, connecting grooves are formed in the upper frame and the side frames, and connecting pieces detachably connected with the connecting grooves are arranged on the upper corner connectors and the lower corner connectors;

and a support groove is formed in the lower frame, and a support piece detachably connected with the support groove is arranged on the lower corner connector.

The utility model discloses an infrared touch screen, including foretell frame structure, structural lamp strip, filter strip and the glass board of installing of frame.

The utility model discloses a wisdom blackboard, including foretell infrared touch screen, be provided with the clipboard on at least one side in the both sides of infrared touch screen.

3. Advantageous effects

Adopt the technical scheme provided by the utility model, compare with prior art, have following beneficial effect:

(1) the frame of the infrared touch screen frame structure of the utility model comprises an upper frame, a lower frame and side frames, wherein the upper frame is connected with the side frames through upper corner codes, and the lower frame is connected with the side frames through lower corner codes; go up frame, lower frame and side frame and seted up lamp strip groove, filter strip groove and glass plate groove in, the filter strip groove is located the lamp strip groove outside. When the lamp strips and the filter strips on the frame need to be overhauled or replaced, only the corresponding frame and the corner connectors on the two sides of the frame need to be dismantled, and then the lamp strips and the filter strips in the frame are directly drawn out, so that the lamp strips and the filter strips are convenient to overhaul and replace, and the overhauling and replacing efficiency is greatly improved.

(2) The upper frame and the side frame are detachably connected with the upper corner code and the lower corner code through the bolt connection between the connecting grooves and the connecting pieces; the lower frame is provided with a supporting groove, the lower corner connector is provided with a supporting piece matched with the supporting groove, the lower frame and the lower corner connector can be detachably connected through the bolt connection between the supporting piece and the supporting groove, so that the corner connector and the frame can be conveniently detached and installed when the lamp strip and the light filtering strip are replaced, and the overhauling and replacing efficiency is further improved.

(3) In the infrared touch screen of the utility model, the side edges of the glass plate of the infrared touch screen are respectively arranged in the glass plate grooves of the upper frame, the side frames and the lower frame, and the glass plate is not required to be fixed by glue and adhesive; simultaneously, the glass plate is integrally kept flat under the fixation of the glass plate grooves of the upper frame, the side frame and the lower frame, the glass plate cannot deform under the action of external force, the problem that the glass and the side frame have large gaps due to the fact that four corners of the glass plate deform convexly is solved, and the product quality is improved.

(4) The utility model discloses a wisdom blackboard, one side of its infrared touch screen is provided with the clipboard, perhaps both sides all are provided with the clipboard, infrared touch screen and clipboard amalgamation back can not produce the piece between infrared touch screen and the clipboard, comparatively level and smooth between the glass board face of infrared touch screen and the clipboard face, make things convenient for in the use of wisdom blackboard.

Drawings

Fig. 1 is a schematic structural diagram of a frame structure of an infrared touch screen of the present invention;

FIG. 2 is a schematic view of the connection mode between the lower corner brace and the lower frame and the side frame of the present invention;

FIG. 3 is a schematic view of the connection between the upper corner brace and the upper and side frames of the present invention;

fig. 4 is a schematic structural view of the middle lower frame of the present invention;

fig. 5 is a schematic structural view of the upper frame of the present invention;

FIG. 6 is a schematic structural view of the middle side frame of the present invention;

FIG. 7 is a schematic structural view of the middle and lower corner brace of the present invention;

fig. 8 is a schematic structural view of the middle-upper corner connector of the present invention;

fig. 9 is a schematic structural diagram of the infrared touch screen of the present invention;

fig. 10 is a schematic structural view of the intelligent blackboard of the present invention.

Description of the reference numerals: 100. an infrared touch screen; 101. a light bar; 102. a light filtering strip; 103. a glass plate; 110. a lower frame; 111. a lower frame light bar groove; 112. a lower frame filter strip groove; 113. a lower frame glass plate groove; 114. a first support groove of the lower frame; 115. a lower frame second support groove; 116. a third support groove of the lower frame; 120. an upper frame; 121. an upper frame light bar groove; 122. the upper frame filters the light bar; 123. a glass plate groove of the upper frame; 124. the upper frame is provided with a first connecting groove; 125. a second connecting groove of the upper frame; 126. a third connecting groove of the upper frame; 127. a fourth connecting groove of the upper frame; 130. a side frame; 131. side frame light bar grooves; 132. a side frame light filtering bar; 133. side frame glass plate grooves; 134. a first connecting groove of the side frame; 135. a side frame second connecting groove; 136. a third connecting groove of the side frame; 137. a side frame fourth connecting groove; 140. lower corner connectors; 141. a lower corner brace first connecting piece; 142. a second connector of the lower corner connector; 143. a third connecting piece of a lower corner connector; 144. a fourth connecting piece of a lower corner connector; 145. a lower corner brace second support member; 146. a third support member of a lower corner connector; 147. a lower corner brace first support member; 150. mounting corners; 151. a first connecting piece is connected with the upper corner; 152. a second connecting piece is connected with the upper corner; 153. a third connecting piece is connected with the upper corner; 154. a fourth connecting piece is connected with the upper corner; 200. a writing board.

Detailed Description

For a further understanding of the present invention, reference will be made to the following detailed description taken in conjunction with the accompanying drawings and examples.

The structure, ratio, size and the like shown in the drawings of the present specification are only used for matching with the content disclosed in the specification, so as to be known and read by people familiar with the technology, and are not used for limiting the limit conditions which can be implemented by the present invention, so that the present invention does not have the substantial significance in the technology, and any structure modification, ratio relationship change or size adjustment should still fall within the scope which can be covered by the technical content disclosed by the present invention without affecting the efficacy which can be produced by the present invention and the achievable purpose. In addition, the terms "upper", "lower", "left", "right" and "middle" used in the present specification are for clarity of description, and are not intended to limit the scope of the present invention, and the relative relationship between the terms and the terms is not to be construed as a scope of the present invention.

Referring to fig. 1, the frame structure of the infrared touch screen of the present embodiment includes a lower frame 110 and an upper frame 120 detachably connected by corner connectors, and two side frames 130 located between the upper frame 120 and the lower frame 110. Specifically, referring to fig. 2, the lower frame 110 and the side frame 130 are connected by a lower corner connector 140, which may be a detachable connection realized by a bolt connection; referring to fig. 3, the upper frame 120 and the side frame 130 are connected by an upper corner brace 150, which may be a detachable connection by a bolt connection.

The lamp strip or the filter strip in the frame structure of this embodiment need only demolish the corner connector of corresponding frame and this frame both sides when needs overhaul or change, then directly take out lamp strip or the filter strip in the frame can. For example, when the light bar or the filter strip in the lower frame 110 has a fault and needs to be overhauled or replaced, only the side frame, and the lower corner codes 140 and the upper corner codes 150 on the two sides of the frame can be removed, at this time, one side of the light bar or the filter strip is exposed, the removal and replacement of the light bar or the filter strip can be realized through a tool or direct manual operation, the operation is convenient, and other components on the infrared touch screen 100 cannot be damaged in the overhauling or replacing process.

Referring to fig. 2 and 3, the lower frame 110, the upper frame 120 and the side frames 130 are all provided with a lamp strip groove, a filter strip groove and a glass plate groove. The glass plate groove is used for installing and fixing the glass plate, the light groove is used for installing and fixing the light bar, and the light filtering bar groove is used for installing and fixing the light filtering bar groove. The light filtering strip groove is located on the outer side of the light strip groove, so that only infrared light with specific wavelength can be emitted after light emitted by the light strip is filtered by the light filtering strip, or only infrared light with specific wavelength can be emitted onto the light strip after external light is filtered by the light filtering strip.

Specifically, referring to fig. 2, the lower frame 110 of the present embodiment is provided with a lower frame light bar groove 111, a lower frame filter bar groove 112, and a lower frame glass plate groove 113, and the side frame 130 is provided with a side frame light bar groove 131, a side frame filter light bar 132, and a side frame glass plate groove 133; referring to fig. 3, the top frame 120 of the present embodiment is provided with a top frame light bar groove 121, a top frame filter light bar 122, and a top frame glass plate groove 123.

It should be noted that, in order to facilitate the processing and assembly of the frame structure, except that the upper frame 120 or the side frame 130 is provided with a mounting opening or a key opening at a required position, the structures of the rest parts may be substantially identical, for example, may be made of the same type of section bar; similarly, the lower frame 110 and the upper frame 120 and the side frame 130 have substantially the same structure, except for the change of the supporting structure to adapt to the structure of the infrared touch screen, and at least the structures of the lower frame 110 and the upper frame 120 and the side frame 130 at the light bar slot, the filter bar slot and the glass plate slot may be substantially the same.

For example, as an embodiment, the light bar groove and the filter groove may be disposed on a vertical portion and a horizontal portion of a substantially L-shaped groove body, that is, a substantially L-shaped groove body is formed on the frame, the groove body has a horizontal portion parallel to the glass plate 103 and a vertical portion perpendicular to the glass plate 103, the light bar groove is disposed on the vertical portion, the filter is disposed on the horizontal portion, after installation, the light bar is engaged in the light bar groove, the filter is engaged in the filter groove, and the light emitting portion or the absorbing portion of the light bar is disposed toward the filter.

Referring to fig. 4 to 6, in the light bar groove of the present embodiment, two opposite groove walls may be provided with limiting grooves, and when the light bar 101 is installed, two lugs of the light bar 101 are respectively embedded into the limiting grooves provided on the two opposite groove walls of the light bar groove, so as to realize installation and fixation of the light bar. This structure also can make infrared touch screen at the in-process that uses, and its lamp strip 101 can not take place to rock in the frame to improve the stability of whole touch-control.

In order to facilitate the installation and the removal of the light bar, an avoiding groove can be formed in the groove wall of the light bar groove and can be formed in parallel with the limiting groove, so that the avoiding groove and the avoiding groove jointly form a protrusion on the groove wall of the light bar groove, when the lug of the light bar 101 is embedded in the limiting groove, one part of one side surface of the light bar 101 body is abutted against the protrusion, and the other part of one side surface of the light bar 101 body is suspended in the avoiding groove. When the light bar 101 in the frame needs to be replaced, the light bar 101 can be taken out through the avoiding groove.

Referring to fig. 4 to 6, the filter groove of the present embodiment may be disposed at the notch of the L-type groove body, so as to improve the purity of the infrared light with a specific wavelength emitted from the light bar, or improve the purity of the infrared light with a specific wavelength incident on the light bar absorption portion, thereby improving the accuracy of infrared touch control.

The filter strip grooves can be provided with mounting grooves on two opposite groove walls respectively, and the mounting grooves are used for mounting the side edges of the filter strip, so that the filter strip can be stably mounted and fixed in the filter strip grooves. In order to improve the filtering effect of the filter strip, the filter strip may be disposed obliquely. Specifically, the mounting grooves on the two groove walls of the filter strip groove can be arranged in a staggered manner, so that the filter strip can be obliquely arranged.

The light bar 101 of the present embodiment may specifically be an infrared absorption light bar or an infrared emission light bar. When the lamp strip in one of the frames of the frame structure is an infrared emission lamp strip, the frame opposite to the frame is inevitably an infrared emission lamp strip. For example, when the lower frame 110 of the frame structure is provided with an infrared emission light bar, the upper frame 120 is necessarily provided with an infrared absorption light bar; when the frame structure is arranged in the left side frame and is provided with the infrared emission lamp strip, the side frame on the right side is provided with the infrared absorption lamp strip, so that the infrared touch control operation can be completed in the outer side of the glass plate 103 of the infrared touch control screen, namely the touch control side of the glass plate 103 forms a two-dimensional infrared light array.

The filter strip 102 of the present embodiment may be a filter strip 102 commonly used in the related art, and functions to filter light, so that only infrared light corresponding to a specific wavelength range can pass through the filter strip 102, and thus the detailed structure of the present embodiment is not described again.

Referring to fig. 7, the lower corner brace 140 of the present embodiment has an overall shape matching the lower frame 110 and the side frame 130, and the lower corner brace 140, the lower frame 110 and the side frame 130 are fixed to form an integral structure. The lower corner brace 140 is provided with a plurality of connecting members on one side facing the side frame 130, the connecting members may be plate-shaped members or strip-shaped members led out from the lower corner brace 140 to the side of the side frame 130, and the connecting members may be provided with screw holes. The side frame 130 is provided with a connecting groove at a position corresponding to the connecting member, and the side frame 130 is also provided with a screw hole at a position corresponding to the screw hole of the connecting member. When the side frame 130 is connected to the lower corner brace 140, the connecting member is inserted into the connecting groove, and then the bolt is inserted through the connecting member and the screw hole of the side frame 130, thereby achieving the connection.

Specifically, one side of the lower corner connector 140 facing the side frame 130 may be provided with a lower corner connector first connecting part 141, a lower corner connector second connecting part 142, a lower corner connector third connecting part 143, and a lower corner connector fourth connecting part 144, and the side frame 130 is correspondingly provided with a side frame first connecting groove 134, a side frame second connecting groove 135, a side frame third connecting groove 136, and a side frame fourth connecting groove 137. Wherein lower corner connector first connecting piece 141, lower corner connector third connecting piece 143 and lower corner connector fourth connecting piece 144 parallel arrangement, lower corner connector second connecting piece 142 sets up with lower corner connector fourth connecting piece 144 is perpendicular to share the shear force that the corner connector received in two directions, thereby improve the intensity that corner connector and frame are connected, improve the holistic stability of frame structure.

The lower corner brace 140 is provided with a plurality of supporting members facing one side of the lower frame 110, and a supporting groove is provided at a position on the lower frame 110 corresponding to the supporting members. Specifically, the side of the lower corner brace 140 facing the lower frame 110 is provided with a lower corner brace first supporting member 147, a lower corner brace second supporting member 145 and a lower corner brace third supporting member 146, and the lower frame 110 is correspondingly provided with a lower frame first supporting groove 114, a lower frame second supporting groove 115 and a lower frame third supporting groove 116. Wherein, angle sign indicating number second support piece 145 and angle sign indicating number third support piece 146 parallel arrangement down, angle sign indicating number first support piece 147 and angle sign indicating number third support piece 146 perpendicular setting down, the effect of the shearing force that receives in two directions of sharing angle sign indicating number also can be played to this structure to improve the holistic stability of frame structure.

Referring to fig. 8, the upper corner brace 150 of the present embodiment has an overall shape matching the upper frame 120 and the side frame 130, and the upper corner brace 150 is integrally formed with the upper frame 120 and the side frame 130 after being fixed thereto. Since the overall structures of the upper frame 120 and the side frame 130 are substantially the same, the upper corner brace 150 has a substantially symmetrical structure, i.e., the structure of the upper corner brace 150 facing the upper frame 120 is substantially the same as the structure of the upper corner brace 150 facing the side frame 130.

Specifically, the upper corner connector 150 is provided with an upper corner connector first connecting piece 151 towards one side of the upper frame 120 and the side frame 130, an upper corner connector second connecting piece 152, an upper corner connector third connecting piece 153 and an upper corner connector fourth connecting piece 154, the upper frame 120 is correspondingly provided with an upper frame first connecting groove 124, an upper frame second connecting groove 125, an upper frame third connecting groove 126 and an upper frame fourth connecting groove 127, and the side frame 130 is correspondingly provided with a side frame first connecting groove 134, a side frame second connecting groove 135, a side frame third connecting groove 136 and a side frame fourth connecting groove 137. The upper corner brace first connecting piece 151, the upper corner brace third connecting piece 153 and the upper corner brace fourth connecting piece 154 are arranged in parallel, and the upper corner brace second connecting piece 152 and the upper corner brace fourth connecting piece 154 are arranged perpendicularly.

Referring to fig. 9, the infrared touch screen 100 includes the above-mentioned frame structure, and a light bar 101 and a filter bar 102 are disposed in an upper frame 120, a side frame 130 and a lower frame 110 of the frame structure.

In addition, the side edges of the glass plate 103 of the infrared touch screen 100 are respectively installed in the glass plate grooves of the upper frame 120, the side frames 130 and the lower frame 110, and the glass plate does not need to be fixed by using glue or an adhesive; meanwhile, under the fixation of the glass plate grooves of the upper frame 120, the side frame 130 and the lower frame 110, the whole glass plate is kept flat, the glass plate cannot deform under the action of external force, the problem that the glass and the side frame have large gaps due to the fact that four corners of the glass plate deform and protrude is solved, and the product quality is improved.

Referring to fig. 10, the present embodiment further provides an intelligent blackboard, which includes an infrared touch screen 100, a writing board may be disposed on one side of the infrared touch screen 100, and the writing board 200 is specifically spliced on the left side or the right side of the infrared touch screen 100; the writing board 200 may be disposed on both sides of the infrared touch screen 100, and the writing board 200 and the infrared touch screen 100 are connected to each other. After the splicing, no splicing seam is generated between the infrared touch screen and the writing board, and the glass board surface of the infrared touch screen and the writing board surface are relatively flat, so that the intelligent blackboard is convenient to use.

The present invention and its embodiments have been described above schematically, and the description is not limited thereto, and what is shown in the drawings is only one of the embodiments of the present invention, and the actual structure is not limited thereto. Therefore, if the person skilled in the art receives the teaching of the present invention, without departing from the inventive spirit of the present invention, the person skilled in the art should also design the similar structural modes and embodiments without creativity to the technical solution, and all shall fall within the protection scope of the present invention.

Claims

1. A frame structure of an infrared touch screen comprises a lower frame, an upper frame and two side frames arranged between the lower frame and the upper frame; the method is characterized in that: the side frame and the lower frame are detachably connected through a lower corner code, and the side frame and the upper frame are detachably connected through an upper corner code; the lower frame, the upper frame and the side frame are all provided with a light bar groove for fixing a light bar, a light filtering bar groove for fixing a light filtering bar and a glass plate groove for fixing a glass plate, and the light filtering bar groove is positioned on the outer side of the light bar groove.

2. The border structure of an infrared touch screen according to claim 1, wherein the light bar grooves and the light filter grooves are respectively disposed on a vertical portion and a horizontal portion of a substantially L-shaped groove body.

3. The infrared touch screen frame structure according to claim 2, characterized in that: the filter strip groove is positioned at the notch of the groove body.

4. The infrared touch screen frame structure according to claim 3, wherein: the filter strip comprises a filter strip groove and a filter strip, wherein the filter strip groove is provided with two opposite groove walls, the two opposite groove walls are provided with mounting grooves which are staggered with each other, the side edge of the filter strip is clamped and embedded in the mounting grooves, and the filter strip is obliquely arranged.

5. The infrared touch screen frame structure according to claim 1, characterized in that: and two opposite groove walls of the lamp strip groove are provided with limiting grooves, and the limiting grooves are used for clamping and embedding lugs of the lamp strip.

6. The infrared touch screen frame structure of claim 5, wherein: at least one of the two opposite groove walls of the lamp strip groove is provided with an avoiding groove, and a disassembly gap is formed between the groove bottom of the avoiding groove and the lamp strip.

7. The infrared touch screen frame structure according to any one of claims 1 to 6, wherein: the lamp strip of the lower frame fixed in the lamp strip groove is an infrared emission lamp strip, and the lamp strip of the upper frame fixed in the lamp strip groove is an infrared absorption lamp strip.

8. The infrared touch screen frame structure according to any one of claims 1 to 6, wherein: connecting grooves are formed in the upper frame and the side frames, and connecting pieces detachably connected with the connecting grooves are arranged on the upper corner connectors and the lower corner connectors;

9. An infrared touch screen is characterized in that: the frame structure of any one of claims 1 to 8, wherein the frame structure is provided with a light bar, a filter bar and a glass plate.

10. An intelligent blackboard, its characterized in that: the infrared touch screen comprises the infrared touch screen of claim 9, wherein a writing board is arranged on at least one of two sides of the infrared touch screen.