CN210865140U - Intelligent blackboard - Google Patents

Abstract

The utility model relates to a smart blackboard, which comprises an electronic flat plate and a writing board, wherein the electronic flat plate comprises a display module and a first splicing frame arranged on the back side surface of a back plate of the electronic flat plate, the writing board comprises a writing body and a second splicing frame, the second splicing frame comprises a first frame plate, a pressing plate and a second frame plate for connecting the first frame plate and the second frame plate, the first frame plate is connected with the back side surface of the writing body, and the pressing plate tightly supports the second splicing frame; the both ends of the length direction of first concatenation frame all are provided with first mounting, the length direction's of second concatenation frame both ends all are provided with the second mounting, all be provided with the direction inclined plane on two mountings, the concatenation department of electron flat board and clipboard still sets up the third mounting, the third mounting includes that joint plate and two intervals set up the limiting plate at the joint plate homonymy, joint plate and two limiting plates enclose into a joint groove, first mounting and second mounting joint are provided with the cooperation inclined plane on the limiting plate at the joint inslot. The utility model discloses a there is not the segment difference behind the concatenation of wisdom blackboard.

Description

Intelligent blackboard

Technical Field

The utility model relates to an electronic equipment technical field especially relates to a wisdom blackboard.

Background

The intelligent blackboard usually comprises an electronic flat plate and a writing plate which are formed in a splicing mode, the electronic flat plate can be operated in a touch mode to present teaching contents in modes of pictures, videos and the like, and the writing plate can be used for teachers to write on the electronic flat plate and present the teaching contents in a blackboard-writing mode. Dull and stereotyped and the clipboard combination of electron can realize traditional teaching and the combination of electronic teaching, promotes the teaching effect.

The electron flat board and the clipboard of traditional wisdom blackboard when the concatenation, generally adopt the pin location in the concatenation side, and the mode that passes through the connection piece at the upper and lower both ends of concatenation side is realized fixedly, and the connection piece passes through the fix with screw at the dorsal surface of electron flat board and clipboard, but location and fixed effect are not good, and the wave can appear on the whole surface, and dislocation phenomenon also appears easily in upper and lower frame department, and the segment difference is obvious, influences user experience.

SUMMERY OF THE UTILITY MODEL

An object of the embodiment of the utility model is to provide a wisdom blackboard, its electronic flat board and clipboard concatenation easy operation, the splicing back is stepless poor, and surfacing is convenient for show and operation.

In order to achieve the above purpose, the embodiment of the present invention adopts the following technical solutions:

the utility model provides an intelligent blackboard, including electronic flat board and at least one concatenation in the clipboard of electronic flat board one side, the electronic flat board includes display module assembly and is located the first concatenation frame of the concatenation side of electronic flat board, display module assembly includes the apron, first concatenation frame is installed at the dorsal surface of apron, the clipboard includes writes the body and is located the second concatenation frame of the concatenation side of clipboard, the second concatenation frame includes first deckle board, supports the clamp plate and connects the second deckle board of first deckle board and the clamp plate, first deckle board with write the dorsal surface of body and be connected, it supports tightly in to support the clamp plate the second concatenation frame keep away from one side of apron;

the two ends of the first splicing frame in the length direction are both connected with first fixing pieces, the two ends of the second splicing frame in the length direction are both connected with second fixing pieces, the first fixing piece is provided with a first guide inclined plane, the second fixing piece is provided with a second guide inclined plane, a third fixing piece is arranged at the joint of the electronic flat plate and the writing board and comprises a clamping plate and two limiting plates which are arranged at the same side of the clamping plate at intervals, the clamping plate and the two limiting plates enclose a clamping groove, the first fixing piece and the second fixing piece are clamped in the clamping groove, the two limiting plates are respectively provided with a matching inclined surface corresponding to the first guiding inclined surface and the second guiding inclined surface, so that the third fixing piece can pull the first fixing piece and the second fixing piece to be attached to each other when being clamped with the first fixing piece and the second fixing piece.

As a preferred scheme of the intelligent blackboard, the intelligent blackboard further comprises a reinforcing pressing block, wherein the reinforcing pressing block comprises a pressing block body and two pressing block connecting pieces, and the two pressing block connecting pieces are connected with the pressing block body;

the pressing plate is provided with at least one group of notch groups at intervals along the length direction, each group of notch groups comprises two avoidance notches, two pressing block connecting pieces are arranged in the avoidance notches respectively and connected with the first splicing frame through screws, and the pressing block body is tightly pressed against a side face, far away from the first splicing frame, of the pressing plate.

As a preferable scheme of the intelligent blackboard, the first fixing piece comprises a first connecting part and a first convex part which are connected, the first connecting part is connected with the first splicing frame through a screw, and the first guide inclined plane is arranged on the first convex part;

the second fixing piece comprises a second connecting portion and a second convex portion, the second connecting portion is connected with the second splicing frame through screws, and the second guide inclined plane is arranged on the second convex portion.

As an optimal selection scheme of wisdom blackboard, first convex part with all set up the concatenation screw hole on the second convex part, be provided with the concatenation through-hole on the joint board, the concatenation screw passes the concatenation through-hole is twisted soon and is in the concatenation screw hole, with will the joint board respectively with first convex part with the second convex part is connected, the axis of concatenation screw is on a parallel with the apron.

As an optimal scheme of wisdom blackboard, the electronic flat board is including being located the first frame of going up of display module group top, the display module group is still including setting up the backplate of the dorsal surface of apron, the backplate is kept away from one side of apron is connected with the hanging subassembly, the hanging subassembly includes wall link plate and first wall hanging strip, first wall hanging strip is including the third connecting portion and the fixed part that are the contained angle setting, the fixed part laminating is in the backplate is kept away from a side of apron, third connecting portion are kept away from the one end of fixed part with first frame is connected, the wall link plate is fixed on the wall, first wall hanging strip is kept away from one side of backplate is equipped with the first couple that the opening faced down, first wall hanging strip articulate on the wall link plate.

As an optimal selection scheme of wisdom blackboard, the backplate includes the base plate, the four sides orientation of base plate the apron extends there is the bounding wall, the bounding wall is kept away from the one end orientation of base plate the outside of bounding wall is extended there is the connecting plate, the connecting plate with the first frame is connected, the bounding wall with form the holding tank between the base plate, the laminating of connecting portion is in the bounding wall is kept away from a side of holding tank.

As an optimal scheme of wisdom blackboard, first last frame department is equipped with first backshell, first backshell shelters from first last frame is close to the side of first wall hanging strip and the bounding wall is adjacent to the part of first last frame, first backshell with the substrate connection, correspond on the first backshell connecting portion are provided with and dodge the groove, third connecting portion insert and establish dodge the inslot, be equipped with the screw hole on the first last frame, third connecting portion with dodge the tank bottom in groove all be equipped with the through-hole that the screw hole corresponds, the screw passes through-hole on the third connecting portion twist behind the through-hole of dodging the tank bottom in the screw hole.

As an optimal selection scheme of wisdom blackboard, the wall link plate is including the wall hanging frame and the strip that hangs that are connected, the wall hanging frame sets up the dorsal surface of electronic flat board, it sets up to hang the strip the dorsal surface of clipboard, just the length of hanging the strip extends along the horizontal direction, the dorsal surface of clipboard is connected with second wall hanging strip, second wall hanging strip with it articulates to hang the strip.

As an optimal scheme of the intelligent blackboard, the display module further comprises a back plate arranged on the back side surface of the cover plate, the back plate is rectangular and comprises a substrate, surrounding plates extend towards the same side of the substrate on four sides of the substrate, one end of each surrounding plate, far away from the substrate, extends towards the outer side of the surrounding plate and is provided with a connecting plate, and each surrounding plate comprises two first surrounding walls arranged at intervals along the vertical direction and two second surrounding walls arranged at intervals along the horizontal direction;

keep away from towards on the base plate one side punching press of bounding wall is formed with additional strengthening, additional strengthening includes girder, auxiliary girder and first strengthening rib, set up two along vertical direction extensions along its central symmetry on the base plate the girder, girder length direction's both ends extend to two respectively first leg, every the girder with be adjacent to the girder through one between the second leg the auxiliary girder is connected, the girder the auxiliary girder the second leg and be located the top form first reinforcement district between the first leg, be equipped with two on the base plate altogether first reinforcement district, every all be provided with in the first reinforcement district first strengthening rib.

As an optimal selection scheme of wisdom blackboard, the girder vice roof beam and first strengthening rib all bulge in the base plate is kept away from one side of bounding wall, just girder bulge in the height of base plate is H1, vice roof beam bulge in the height of base plate is H2, first strengthening rib bulge in the height of base plate is H3, wherein, H2 < H1, H3 is less than or equal to H2.

As an optimal selection scheme of wisdom blackboard, write the body and keep away from the one end of second concatenation frame can be dismantled and be provided with and shelter from the frame, shelter from the frame and keep away from write the one end and the wall butt of body, it is inside hollow frame structure to shelter from the frame, it all is equipped with its inside opening of intercommunication to shelter from the frame along the both ends of vertical direction, it is equipped with to shelter from the frame open-ended terminal surface is the installation terminal surface, the installation terminal surface can be dismantled and be provided with and shelter from installation terminal surface and shutoff open-ended protection piece.

As a preferred scheme of wisdom blackboard, protection piece pass through buckle mechanism with shelter from the frame and be connected.

As an optimal scheme of the intelligent blackboard, one side face of the shielding frame far away from the wall face is flush with the front side face of the writing main body.

As an optimal selection scheme of wisdom blackboard, still set up camera subassembly on the electronic flat board, camera subassembly includes:

the positioning piece is arranged on the back side surface of the cover plate, and a positioning through hole is formed in the positioning piece;

the module bracket is connected with the positioning piece and is provided with a mounting hole communicated with the positioning through hole;

the lens module is arranged in the mounting hole;

the electronic flat board comprises a board card support, wherein the board card support is connected with a first upper frame of the electronic flat board, a camera board card electrically connected with the lens module is fixed on the board card support, and a tightly supporting part used for tightly supporting the lens module in the mounting hole is further arranged on the board card support.

As an optimal scheme of the intelligent blackboard, a fourth positioning column is convexly arranged on one of the positioning piece and the module support, and a fourth positioning hole matched with the fourth positioning column in an inserted mode is formed in the other one of the positioning piece and the module support.

As a preferable scheme of the intelligent blackboard, the positioning piece is adhered to the back side surface of the cover plate; and/or the presence of a gas in the gas,

the module bracket is bonded on the positioning piece.

As a preferred scheme of the intelligent blackboard, a first lower frame is further arranged below the display module, and two ends of the first lower frame in the length direction can be detachably connected with corner pieces;

the first lower frame comprises a lower frame body, the lower frame body is provided with a first side face which is the same as the front side face of the cover plate, supporting convex parts for supporting the cover plate and object placing convex parts for placing objects are arranged on the first side face in a protruding mode at intervals, the height of the supporting convex parts protruding out of the first side face is L1, the height of the object placing convex parts protruding out of the first side face is L2, L2 is larger than L1, the object placing convex parts protrude out of the front side face of the cover plate, an accommodating cavity is arranged in the lower frame body, and a first opening communicated with the accommodating cavity is formed in the end face, connected with one end of the corner piece, of the frame body;

the corner piece includes the turning body, the turning body can by first opening inserts hold the intracavity, the turning body pass through the screw with this body coupling of lower frame, the protruding arc convex part and the connection convex part of being provided with on the turning body, connect the one end of convex part with support the length direction's of convex part tip butt, the other end is connected the arc convex part, the arc convex part is kept away from connect the one end of convex part with put thing convex part length direction's tip butt.

As a preferable scheme of the intelligent blackboard, the corner body has a corner side face on the same side as the front side face of the cover plate, the height of the connecting convex part protruding out of the corner side face is L3, L3-L1 is H4, and H4 is not less than 0.1 mm; and/or the presence of a gas in the gas,

the height of one end of the arc-shaped convex part, which is connected with the placing convex part and protrudes out of the side face of the corner is L4, L4-L2 is H5, and H5 is not less than 0.1 mm.

As an optimal scheme of wisdom blackboard, the height of arc convex part is by connecting put the one end orientation of thing convex part and connect the one end of connecting the convex part reduces gradually, just, the arc convex part is connected the height of the one end of connecting the convex part equals connect the height of convex part.

The utility model discloses beneficial effect does: through set up on the clipboard and support the first concatenation frame that the clamp plate supported the electronic flat board, can make the dislocation of clipboard and the dull and stereotyped concatenation department of electron corrected, eliminate the segment difference of this position, through setting up the three mounting that has the inclined plane, can pass through the joint of third mounting and the cooperation on inclined plane after the dull and stereotyped and clipboard concatenation of electron, stimulate first mounting and second mounting and paste tightly, and then stimulate the dull and stereotyped and clipboard and paste tightly, the joint board of third mounting can also prescribe a limit to the position of first mounting and second mounting simultaneously, guarantee that electronic flat board and clipboard after the concatenation do not have the dislocation in vertical direction. The utility model discloses an electronic flat plate and clipboard concatenation easy operation of wisdom blackboard, it is poor not have obvious section after the concatenation, surfacing, be convenient for show and operation.

Drawings

The present invention will be described in further detail with reference to the accompanying drawings and examples.

Fig. 1 is a perspective view of a first viewing angle of the intelligent blackboard according to an embodiment of the present invention.

Fig. 2 is a second perspective view of the intelligent blackboard according to the embodiment of the present invention.

Fig. 3 is an enlarged schematic view of a portion a of fig. 2.

Fig. 4 is a first fixing member according to an embodiment of the present invention; and the second fixing piece and the third fixing piece are assembled.

Fig. 5 is a schematic structural diagram of a second splicing frame according to an embodiment of the present invention.

Fig. 6 is a schematic structural diagram of a reinforcing briquette according to an embodiment of the present invention.

Fig. 7 is an enlarged schematic view of fig. 2 at B.

Fig. 8 is an enlarged schematic view of fig. 2 at C.

Fig. 9 is a schematic structural diagram of a back plate according to an embodiment of the present invention.

Fig. 10 is a schematic structural view of a first hanging strip according to an embodiment of the present invention.

Fig. 11 is a schematic structural view of a second hanging strip according to an embodiment of the present invention.

Fig. 12 is a schematic structural diagram of a first rear housing according to an embodiment of the present invention.

Fig. 13 is a schematic structural view of a wall hanging splicing member according to an embodiment of the present invention.

Fig. 14 is a schematic side view of the intelligent blackboard according to the embodiment of the present invention.

Fig. 15 is a schematic structural view of a shielding frame according to an embodiment of the present invention.

Fig. 16 is an enlarged schematic view of fig. 15 at D.

Fig. 17 is a schematic structural view of a protector according to an embodiment of the present invention.

Fig. 18 is a schematic structural view of a second splicing element according to an embodiment of the present invention.

Fig. 19 is a schematic cross-sectional view of an electronic tablet according to an embodiment of the present invention.

Fig. 20 is an enlarged schematic view of fig. 19 at E.

Fig. 21 is a schematic structural diagram of a positioning element according to an embodiment of the present invention.

Fig. 22 is a first perspective view of the board card holder according to the embodiment of the present invention.

Fig. 23 is a second perspective schematic view of the board card holder according to the embodiment of the present invention.

Fig. 24 is a schematic structural view of a light guide pillar according to an embodiment of the present invention.

Fig. 25 is an enlarged schematic view at F of fig. 19.

Fig. 26 is a schematic structural diagram of a first lower frame according to an embodiment of the present invention.

Fig. 27 is an enlarged schematic view at G of fig. 26.

Fig. 28 is a partial sectional view of an electronic tablet according to an embodiment of the present invention.

Fig. 29 is a schematic structural view of a corner fitting according to an embodiment of the present invention.

In the figure:

1. an electronic tablet; 11. a first splice frame; 12. a cover plate; 13. a first fixing member; 131. a first guide slope; 132. a first connection portion; 133. a first convex portion; 134. a first limiting part; 14. a first upper frame; 15. a back plate; 151. a substrate; 152. enclosing plates; 153. a connecting plate; 154. a main beam; 1541. a main beam connection hole; 1542. a reinforcing protrusion; 155. a secondary beam; 156. a first reinforcing rib; 1561. a first reinforcing strip; 1562. a second reinforcing strip; 1563. a third reinforcing strip; 157. a connecting beam; 158. a second reinforcing rib; 159. a first auxiliary beam; 1510. a second auxiliary beam; 1511. a third reinforcing rib; 16. a first rear case; 161. an avoidance groove; 17. a first lower frame; 171. a lower frame body; 1711. a first side surface; 1712. a second side surface; 1713. a third side; 1714. an accommodating chamber; 1715. a first opening; 1716. a second opening; 172. a support protrusion; 173. a placement convex part; 174. a hook; 18. a second rear housing; 19. a third rear housing; 110. a corner piece; 1101. a corner body; 1102. an arc-shaped convex part; 1103. a connecting projection; 1104. a limiting convex part; 1105. a plug-in part; 111. an inner frame; 1111. a bayonet of the inner frame; 112. a corner fitting;

2. a writing board; 21. a second splice frame; 211. a first frame plate; 212. a second frame plate; 213. pressing the plate; 214. avoiding the notch; 22. a writing body; 23. a second fixing member; 231. a second guide slope; 232. a second connecting portion; 233. a second convex portion; 234. a second limiting part; 24. shielding the frame; 241. an opening; 242. mounting an end face; 243. a connecting bayonet; 244. a frame main body; 245. connecting the convex edge; 246. abutting the convex edge; 25. a protective member; 251. connecting a buckle; 26. a second upper frame; 27. a second lower frame; 28. a second splice; 281. a third positioning column;

3. a third fixing member; 31. a clamping and connecting plate; 311. splicing through holes; 32. a limiting plate; 321. a mating bevel;

4. reinforcing and pressing blocks; 41. a briquetting body; 42. a briquetting connecting piece;

5. a wall hanging component; 51. wall hanging plates; 511. a wall-mounted frame; 512. a suspension bar; 513. a wall hanging splice; 5131. splicing plates; 5132. a baffle plate; 5133. a first positioning post; 52. a first wall hanging strip; 521. a third connecting portion; 522. a fixed part; 523. a first hook; 53. a second wall hanging strip; 531. a second hook;

6. a camera assembly; 61. a positioning member; 611. positioning the through hole; 612. a fourth positioning hole; 62. a module holder; 63. a lens module; 64. a board card support; 641. a tightening part; 6411. a first abutting plate; 6412. a second abutting plate; 642. a first mounting plate; 643. a second mounting plate; 6431. a light guide hole; 644. a third mounting plate; 65. a camera board card; 651. a signal lamp; 66. a light guide pillar; 661. a light guide body; 662. a light guide column limiting part;

7. and a functional module.

Detailed Description

In order to make the technical problems, technical solutions and technical effects achieved by the present invention more clear, the embodiments of the present invention will be described in further detail with reference to the accompanying drawings, and obviously, the described embodiments are only some embodiments, not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by those skilled in the art without creative efforts belong to the protection scope of the present invention.

In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, detachably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

Referring to fig. 1 and 2, the positive side of wisdom blackboard, electronic flat board 1 or clipboard 2 in the utility model refers to: the side that the user can see or write on is the opposite side of the back side to the front side, which is usually the side facing the wall.

As shown in fig. 1 to 6, the utility model discloses an intelligent blackboard, including electronic flat board 1 and at least one clipboard 2 of concatenation in electronic flat board 1 one side, electronic flat board 1 includes display module and the first concatenation frame 11 that is located the concatenation side of electronic flat board 1, display module includes apron 12, first concatenation frame 11 is installed at the dorsal surface of apron 12, clipboard 2 includes writes body 22 and the second concatenation frame 21 that is located the concatenation side of clipboard 2, second concatenation frame 21 includes first deckle 211, support clamp plate 213 and connects first deckle 211 and support clamp plate 213's second deckle 212, first deckle 211 is connected with the dorsal surface of writing body 22, support clamp plate 213 supports tightly and keeps away from the one side of apron 12 at second concatenation frame 21; the two ends of the first splicing frame 11 in the length direction are both connected with a first fixing piece 13, the two ends of the second splicing frame 21 in the length direction are both connected with a second fixing piece 23, the first fixing piece 13 is provided with a first guide inclined plane 131, the second fixing piece 23 is provided with a second guide inclined plane 231, the splicing part of the electronic flat panel 1 and the writing board 2 is also provided with a third fixing piece 3, the third fixing piece 3 comprises a clamping plate 31 and two limiting plates 32 which are arranged at the same side of the clamping plate 31 at intervals, the clamping plate 31 and the two limiting plates 32 enclose a clamping groove, the first fixing piece 13 and the second fixing piece 23 are clamped in the clamping groove, the two limiting plates 32 are respectively provided with a matching inclined plane 321 corresponding to the first guide inclined plane 131 and the second guide inclined plane 231, so that the third fixing member 3 can pull the first fixing member 13 and the second fixing member 23 to be attached to each other when being clamped with the first fixing member 13 and the second fixing member 23. Through set up on the clipboard 2 and support the first concatenation frame 11 that presses the dull and stereotyped 1 of electron through the pressure plate 213, can make the dislocation of clipboard 2 and the dull and stereotyped 1 concatenation department of electron corrected, eliminate the segment difference of this position, through setting up the three mounting that has the inclined plane, can be after dull and stereotyped 1 of electron and the clipboard 2 concatenation through the joint of third mounting 3 and the cooperation on inclined plane, stimulate first mounting 13 and second mounting 23 and paste tightly, and then stimulate dull and stereotyped 1 of electron and clipboard 2 and paste tightly, the joint board 31 of third mounting 3 can also prescribe a limit to the position of first mounting 13 and second mounting 23 simultaneously, guarantee that dull and stereotyped 1 of electron and clipboard 2 after the concatenation do not have the dislocation in vertical direction. The utility model discloses a 2 concatenation easy operation of electronic flat board 1 and clipboard of wisdom blackboard, it is poor not have obvious section after the concatenation, surfacing, be convenient for show and operation.

The intelligent blackboard further comprises a reinforcing pressing block 4, the reinforcing pressing block 4 comprises a pressing block body 41 and two pressing block connecting pieces 42, and the two pressing block connecting pieces 42 are connected with the pressing block body 41; support and be equipped with at least a set of breach group along its length direction spaced apart on the clamp plate 213, every breach group is including two dodge breach 214, and two briquetting connecting pieces 42 set up respectively in two dodge breachs 214 and are connected with first concatenation frame 11 through the screw, and briquetting body 41 supports tightly and keeps away from a side of first concatenation frame 11 in supporting clamp plate 213. Through setting up reinforcing pressure block 4, can prevent effectively to support clamp plate 213 the turn-ups condition appears, guarantee to support clamp plate 213 can be in the position of supporting the first concatenation frame 11 all the time, and then eliminate the section position deviation on the concatenation side length direction, guarantee that electron flat board 1 and clipboard 2 are level and smooth in the concatenation department promptly.

The first fixing member 13 includes a first connecting portion 132 and a first protrusion 133 connected to each other, the first connecting portion 132 is connected to the first splicing frame 11 by a screw, and the first guide slope 131 is disposed on the first protrusion 133; the second fixing member 23 includes a second connecting portion 232 and a second protrusion 233 connected, the second connecting portion 232 is connected to the second split frame 21 by a screw, and the second guide slope 231 is provided on the second protrusion 233.

Splicing threaded holes are formed in the first convex portion 133 and the second convex portion 233, a splicing through hole 311 is formed in the clamping plate 31, a splicing screw penetrates through the splicing through hole 311 and is screwed in the splicing threaded hole, so that the clamping plate 31 is connected with the first convex portion 133 and the second convex portion 233 respectively, and the axis of the splicing screw is parallel to the cover plate 12. Through setting up the concatenation screw, can remove to first mounting 13 and second mounting 23 at third mounting 3 and peg graft in joint inslot after-fixing at this position, prevent that third mounting 3 from being removed at will and guaranteeing that the concatenation of electronic flat board 1 and clipboard 2 does not become invalid.

Further, one end of the first protruding portion 133, which is far away from the first connecting portion 132, is connected with a first limiting portion 134, the first limiting portion 134 is disposed at one end of the limiting plate 32, which is far away from the clamping plate 31, the first limiting portion 134 extends towards one side, which is far away from the second fixing member 23, one end of the second protruding portion 233, which is far away from the second connecting portion 232, is connected with a second limiting portion 234, the second limiting portion 234 is disposed at one end of the limiting plate 32, which is far away from the clamping plate 31, and the second limiting portion 234 extends towards one side, which is far away from the first fixing member. The first and second position-limiting portions 134 and 234 can reduce the difficulty in assembling the third fixing element 3 with the first and second fixing elements 13 and 23, and can prevent the third fixing element 3 from moving in the thickness direction of the smart black board and separating from the first and second fixing elements 13 and 23 after being assembled.

In an embodiment, as shown in fig. 2 and 7 to 13, the electronic flat panel 1 includes a first upper frame 14 located above the display module, the display module further includes a back plate 15 disposed on a back side surface of the cover plate 12, one side of the back plate 15 away from the cover plate 12 is connected with a wall hanging assembly 5, the wall hanging assembly 5 includes a wall hanging plate 51 and a first wall hanging strip 52, the first wall hanging strip 52 includes a third connecting portion 521 and a fixing portion 522 disposed at an included angle, the fixing portion 522 is attached to one side surface of the back plate 15 away from the cover plate 12, one end of the third connecting portion 521 away from the fixing portion 522 is connected with the first upper frame 14, the wall hanging plate 51 is fixed on a wall surface, one side of the first wall hanging strip 52 away from the back plate 15 is provided with a first hook 523 with a downward opening, and the first wall hanging strip 52 is hung. Through the part of connecting hanging subassembly 5 at backplate 15 does not set up the backshell, backplate 15 is direct to be connected with hanging subassembly 5 promptly, can reduce the distance with the wall behind the wisdom blackboard wall hanging, first wall hanging strip 52 sets up third connecting portion 521 and fixed part 522 for being the contained angle and connecting simultaneously, third connecting portion 521 is fixed at first frame 14 of going up, make hanging subassembly 5 wholly shift up, not only can shorten the length of first wall hanging strip 52, can also be with exerting on backplate 15 the effort dispersion part arrive first frame 14 of going up, prevent that backplate 15 from warping.

Specifically, the back plate 15 includes a base plate 151, surrounding plates 152 extend from four sides of the base plate 151 toward the cover plate 12, a connecting plate 153 extends from one end of the surrounding plate 152 away from the base plate 151 toward the outer side of the surrounding plate 152, an accommodating groove is formed between the surrounding plate 152 and the base plate 151, and a side face of the surrounding plate 152 away from the accommodating groove is attached to the third connecting portion 521. Backplate 15 needs to support display module's optics diaphragm subassembly and apron 12 to need set up light emitting component in a side that is close to the optics diaphragm subassembly, consequently, the setting of holding tank can provide installation space for light emitting component, and the setting of connecting plate 153 can support optics diaphragm subassembly and apron 12, keep apart optics diaphragm subassembly and light emitting component simultaneously, on the heat that makes the last production of light emitting component can not transmit the optics diaphragm subassembly, promote the whole display effect of electronic flat board 1.

In the present embodiment, the enclosing plate 152 is disposed at an obtuse angle with respect to the base plate 151, and therefore, the enclosing plate 152 is inclined, and an included angle between the third connecting portion 521 and the fixing portion 522 is identical to an included angle between the enclosing plate 152 and the base plate 151, so that both the third connecting portion 521 and the fixing portion 522 can be attached to the enclosing plate 152 and the base plate 151, respectively.

First frame 14 department of going up is equipped with first backshell 16, first backshell 16 shelters from a side that first frame 14 is close to first wall hanging strip 52 and the part that bounding wall 152 is close to first frame 14 of going up, first backshell 16 is connected with base plate 151, it is provided with and dodges groove 161 to correspond third connecting portion 521 on the first backshell 16, third connecting portion 521 is inserted and is established in dodging groove 161, be equipped with the screw hole on the first frame 14 of going up, the tank bottom of third connecting portion 521 and dodging groove 161 all is equipped with the through-hole that corresponds with the screw hole, the screw passes the through-hole on third connecting portion 521, it twists in the screw hole of first frame 14 to dodge behind the through-hole of the tank bottom of groove 161. The provision of the first back case 16 can shield gaps and electronic components and the like on the first upper frame 14 on the back side of the electronic tablet 1, thereby enhancing the appearance of the electronic tablet 1, and the provision of the avoiding groove 161 is provided to prevent the first back case 16 from obstructing the connection between the first wall hanging strip 52 and the first upper frame 14.

Preferably, a side of the first rear housing 16 away from the first upper rim 14 is flush with a side of the substrate 151 of the back plate 15 away from the receiving groove. In order to realize the above structure, a stepped groove may be provided on the base plate 151, and a portion of the first rear case 16 connected to the base plate 151 is received by the stepped groove, preventing the first rear case 16 from protruding outward at this position.

Further, the first wall hanging strip 52 is formed by bending a sheet metal material, the third connecting portion 521 includes a first body in a flat plate shape and a first reinforcing edge bent towards a side surface far away from the surrounding plate 152 along the width direction of the first body, the fixing portion 522 includes a second body in a flat plate shape and a second reinforcing edge bent towards a side surface far away from the substrate 151 along the width direction of the second body, the first hook 523 is arranged on the second reinforcing edge, one end of the first body is connected with the second body, the other end of the first body extends to form a first connecting edge, the first connecting edge is attached to the bottom of the avoiding groove 161, and the first connecting edge is fixedly connected with the bottom of the avoiding groove 161 and the first upper frame 14 through screws.

The electronic flat panel 1 further includes a second rear housing 18 disposed at the first lower frame 17 below the display module, the second rear housing 18 shields a side of the first lower frame 17 close to the first hanging strip 52 and a portion of the enclosing plate 152 adjacent to the first lower frame 17, and the second rear housing 18 is connected to the substrate 151. By providing the second rear case 18, the gap at the first lower frame 17 on the rear side of the electronic flat panel 1, the electronic components, and the like can be shielded, and the appearance of the electronic flat panel 1 can be improved.

Preferably, a side of the second rear shell 18 away from the first lower frame 17 is flush with a side of the substrate 151 of the back plate 15 away from the receiving groove. In order to realize the above structure, a stepped groove may be provided on the base plate 151, and a portion of the second rear case 18 connected to the base plate 151 is received by the stepped groove, preventing the second rear case 18 from protruding outward at this position.

Preferably, the fixing portion 522 is fixed to the back plate 15 by screws. By fixing the fixing portion 522 to the back panel 15 by a screw as well, the connection stability of the first wall hanging strip 52 can be enhanced.

In this embodiment, two main beams 154 are disposed on the back panel 15, the main beams 154 extend in the vertical direction, the two main beams 154 are disposed symmetrically along the center of the back panel 15, two first wall hanging strips 52 are disposed on the back side surface of the electronic flat panel 1, and the fixing portions 522 of the two first wall hanging strips 52 are respectively fixed on the main beams 154 through screws. Through setting up girder 154, can strengthen the intensity of backplate 15, prevent that backplate 15 from taking place to warp, and set up first wall hanging strip 52 into two, can share the weight of whole electronic flat board 1 (wisdom blackboard even), also can promote the stability behind the hanging simultaneously, and the fixed part 522 of first wall hanging strip 52 is connected on girder 154, can prevent effectively that backplate 15 from taking place to warp.

Specifically, the back plate 15 is integrally formed by stamping, and the main beam 154 is stamped and formed from the base plate 151 toward the side away from the receiving groove. The integrated back plate 15 has good integrity, high strength, difficult deformation, convenient exposure and beautiful appearance.

In addition, the back plate 15 is further provided with a mounting area for mounting the control mainboard, the mounting area is shielded by the third rear shell 19, and one side surface of the third rear shell 19 far away from the back plate 15 is flush with or spaced from one side of the wall hanging plate 51 close to the wall surface. By arranging the rear shells, the positions of the electronic components (such as a control mainboard, a power supply, a switching circuit board and the like) on the back plate 15 are shielded, so that the electronic components can be protected, and the appearance of the electronic flat plate 1 and even the whole intelligent blackboard is attractive.

The wall hanging plate 51 comprises a wall hanging frame 511 and a hanging strip 512 which are connected, the wall hanging frame 511 is arranged on the back side surface of the electronic flat plate 1, the hanging strip 512 is arranged on the back side surface of the writing board 2, the length of the hanging strip 512 extends along the horizontal direction, the back side surface of the writing board 2 is connected with a second wall hanging strip 53, and the second wall hanging strip 53 is hung with the hanging strip 512. Hang electronic flat board 1 through the wall of setting up frame construction and hang strip 512 and hang clipboard 2, adopt the hanging strip 512 of strip structure, can reduce the use of material when guaranteeing sufficient suspension strength, clipboard 2's weight is less than electronic flat board 1 far away, consequently need not set up frame construction's wall and hang clipboard 2, the cost is reduced effectively to the wall of hanging frame 511.

Specifically, second wall lacing bar 53 adopts the sheet metal material shaping of buckling, second wall lacing bar 53 is including being the tabulate third body, the both sides of the width direction of third body are towards keeping away from the lateral surface of clipboard 2 and are buckled there is the third and strengthen the limit, the second couple 531 that the opening is down has been seted up on the third and strengthened the edge, second couple 531 articulates with hanging strip 512, the third body sets up with the dorsal surface interval of clipboard 2, the third body still is provided with the second connection limit of buckling towards clipboard 2, the one end that the third body was kept away from in the second connection limit extends towards the outside of second wall lacing bar 53 has the third to connect the limit, the third is connected the limit and is connected through the dorsal surface of screw and clipboard 2.

In this embodiment, the hanging strip 512 is connected with the wall-hanging frame 511 through the wall-hanging splicing piece 513, the wall-hanging splicing piece 513 includes a splicing plate 5131 and a baffle 5132 that are arranged at an included angle, the splicing plate 5131 is respectively connected with the hanging strip 512 and the wall-hanging frame 511 through screws, and the baffle 5132 abuts against the upper end surfaces of the hanging strip 512 and the wall-hanging frame 511. Through setting up the hanging splice 513 similar to the L type, can be connected hanging strip 512 and hanging frame 511, also can reduce the counterpoint degree of difficulty of the two when the concatenation simultaneously, during the concatenation, only need offset the tip of hanging strip 512 and the tip of hanging frame 511, and the tip of hanging strip 512 offsets with the upper end and the baffle 5132 of hanging frame 511, then revolves the screw and can realize connecting.

In order to further reduce the assembling difficulty, two first positioning posts 5133 are convexly arranged on the splicing plate 5131, a first positioning hole is respectively arranged on the hanging strip 512 and the wall hanging frame 511, and the first positioning posts 5133 are inserted into the first positioning holes. Certainly, in other embodiments, the positions of the first positioning post 5133 and the first positioning hole may also be interchanged, that is, the splice plate 5131 is provided with two first positioning holes, and the hanging strip 512 and the wall-hanging frame 511 are respectively provided with one first positioning post 5133 inserted into the first positioning hole.

As shown in fig. 9, the back panel 15 is rectangular, and the enclosure 152 of the back panel 15 includes two first enclosure walls spaced apart in the vertical direction and two second enclosure walls spaced apart in the horizontal direction; towards the one side punching press that keeps away from bounding wall 152 on the base plate 151 and being formed with additional strengthening, additional strengthening includes girder 154, auxiliary girder 155 and first strengthening rib 156, set up two girder 154 that extend along vertical direction along its central symmetry on the base plate 151, girder 154 length direction's both ends extend to two first leg respectively, connect through an auxiliary girder 155 between every girder 154 and the second leg that is close to girder 154, auxiliary girder 155, the second leg and be located and form first reinforcing region between the first leg of top, be equipped with two first reinforcing regions altogether on the base plate 151, all be provided with first strengthening rib 156 in every first reinforcing region. The reinforcing structure is directly formed on the back plate 15 by stamping, so that the independent manufacture of the reinforcing structure can be avoided, meanwhile, the process of assembling the reinforcing structure can be omitted, the production efficiency is improved, the cost is reduced, the integrity and the strength of the whole back plate 15 can be improved by integrally manufacturing the reinforcing structure with the back plate 15, and the deformation of the back plate 15 is effectively prevented; through setting up first reinforcement district, two first reinforcement districts are located the left and right corners of the top of backplate 15 respectively to punching press forms first strengthening rib 156 in the first reinforcement district that is located both sides, can increase the intensity of backplate 15 top both sides, and this backplate 15 can be applied to in the wisdom blackboard, guarantees that backplate 15 after the concatenation does not take place to warp.

The wisdom blackboard is formed by the concatenation of an electronic flat board 1 and two clipboards that set up respectively in electronic flat board 1 both sides, and the wisdom blackboard is behind the wall hanging, under the effect of 2 self gravities of clipboard, and the pulling force that electronic flat board 1 both sides top position received is more, and this position takes place to warp most easily, consequently sets up first strengthening rib 156 in this position of backplate 15 especially, can prevent effectively that backplate 15 from warping.

Furthermore, the main beam 154, the sub-beam 155 and the first reinforcing rib 156 all protrude from one side of the substrate 151 away from the enclosing plate 152, the height of the main beam 154 protruding from the substrate 151 is H1, the height of the sub-beam 155 protruding from the substrate 151 is H2, and the height of the first reinforcing rib 156 protruding from the substrate 151 is H3, wherein H2 is greater than H1, and H3 is not less than H2. By setting the height of the main beam 154 protruding from the substrate 151 to be higher, the main beam 154 can bear the main gravity of the electronic flat panel 1, and the auxiliary beam 155 and the first reinforcing ribs 156 are both set to be lower than the main beam 154, so that the usage amount of materials is reduced and the cost is reduced on the premise of ensuring sufficient support strength. In the present embodiment, the surfaces of the sub-beam 155 and the first reinforcing bead 156 are flush.

In addition, an arc transition structure is arranged at the joint of the secondary beam 155 and the main beam 154. This radiused transition structure may avoid stress concentrations at the junction of the primary beams 154 and the secondary beams 155.

A connecting beam 157 is formed on one side of the base plate 151 away from the enclosing plate 152 in a stamping mode, the connecting beam 157 is connected with the two main beams 154, and the connecting beam 157 and the two auxiliary beams 155 are located on the same horizontal plane; a second reinforcing rib 158 is stamped and formed on the side of the base plate 151 facing away from the shroud 152, a second reinforcing region is formed between the two main beams 154, the connecting beam 157 and the first surrounding wall located above, and the second reinforcing rib 158 is located in the second reinforcing region. The attachment beams 157 provide strength between the two main beams 154.

Specifically, two main beams 154 and a connection beam 157 are each disposed adjacent to the center of the back panel 15 in the vertical direction.

A first auxiliary beam 159 is stamped and formed on one side of the base plate 151 away from the enclosing plate 152, the first auxiliary beam 159 is arranged in the second reinforcing region, the first auxiliary beam 159 extends along the horizontal direction, two ends of the first auxiliary beam are respectively connected with the two main beams 154, and the first auxiliary beam 159 is respectively arranged at intervals with the connecting beam 157 and the first enclosing wall above.

A third reinforcing region is formed between the two main beams 154, the connecting beam 157 and the first surrounding wall located below, a second auxiliary beam 1510 is formed on one side of the base plate 151 away from the surrounding plate 152 in a stamping mode, the second auxiliary beam 1510 is arranged in the third reinforcing region, the second auxiliary beam 1510 extends along the horizontal direction, two ends of the second auxiliary beam 1510 are respectively connected with the two main beams 154, and the second auxiliary beam 1510 is respectively arranged at intervals with the connecting beam 157 and the first surrounding wall located below.

In addition, a third reinforcing rib 1511 is further arranged in the third reinforcing region, the third reinforcing rib 1511 and the back plate 15 are integrally formed in a punching mode, and the third reinforcing rib 1511 is arranged between the connecting beam 157 and the second auxiliary beam 1510 and is respectively connected with the connecting beam 157 and the second auxiliary beam 1510.

Further, the first reinforcing bead 156 includes a first reinforcing bead 1561, a second reinforcing bead 1562 and a third reinforcing bead 1563, a first end of the first reinforcing bead 1561 extends to the first peripheral wall located above, and the first end of the first reinforcing bead 1561 is spaced apart from the second peripheral wall, the first end of the second reinforcing bead 1562 is connected to the main beam 154, the first end of the third reinforcing bead 1563 is connected to the sub-beam 155, and the second end of the first reinforcing bead 1561, the second end of the second reinforcing bead 1562 and the second end of the third reinforcing bead 1563 are connected.

The center line of the second reinforcing bars 1562 and the center line of the third reinforcing bars 1563 intersect at a point, and the center line of the first reinforcing bars 1561 and the center line of the second reinforcing bars 1562 and the center line of the third reinforcing bars 1563 intersect at a point which is offset from each other.

Specifically, the second reinforcing bar 1562 is perpendicular to the main beam 154, and a first end of the second reinforcing bar 1562 is disposed at an interval from both an end of the main beam 154 and a position where the main beam 154 is connected to the sub-beam 155; the third reinforcing bar 1563 is perpendicular to the sub-beam 155, and a first end of the third reinforcing bar 1563 and both ends of the sub-beam 155 in the length direction are disposed at an interval. The end of the secondary beam 155 remote from the primary beam 154 extends to the shroud 152.

Further, there is an enclosure wall reinforcement portion along its length direction interval distribution on the first enclosure wall, and there is an enclosure wall reinforcement portion along its length direction interval distribution on the second enclosure wall, and the enclosure wall reinforcement portion is towards inboard stamping forming by the outside of bounding wall 152, and enclosure wall reinforcement portion protrusion in the inner wall of bounding wall 152. The enclosure wall reinforcing parts with the stamping directions opposite to those of the main beam 154, the auxiliary beam 155, the first reinforcing ribs 156 and the like are arranged, so that the strength of the enclosure plate 152 can be enhanced, the connecting plate 153 on the enclosure plate 152 is generally used for supporting the optical membrane assembly of the electronic flat plate 1, the strength of the enclosure plate 152 is required, and the arrangement of the enclosure wall reinforcing parts can greatly improve the strength of the enclosure plate 152 and ensure that the enclosure plate 152 is not deformed.

In addition, a plurality of main beam connection holes 1541 are formed in the main beam 154 along the length direction thereof, the main beam connection holes 1541 are used for connecting wall hanging strips, two arc-shaped reinforcing protrusions 1542 are respectively stamped and formed on both sides of the main beam connection holes 1541, and the reinforcing protrusions 1542 are protruded toward the inner side of the surrounding plate 152.

As shown in fig. 1 and 14 to 18, one end of the writing body 22 far away from the second splicing frame 21 is detachably provided with a shielding frame 24, one end of the shielding frame 24 far away from the writing body 22 abuts against a wall surface, the shielding frame 24 is of a hollow frame structure inside, both ends of the shielding frame 24 along the vertical direction are both provided with openings 241 communicated with the inside of the shielding frame 24, the end surface of the shielding frame 24 provided with the openings 241 is a mounting end surface 242, and the mounting end surface 242 is detachably provided with a protection member 25 shielding the mounting end surface 242 and blocking the openings 241. Gaps between the left end and the right end of the intelligent blackboard and the wall surface can be plugged by arranging the shielding frame 24, so that the appearance of the whole intelligent blackboard is attractive, and meanwhile, under the supporting action of the shielding frame 24, the intelligent blackboard is high in stability after being hung on the wall and is not prone to shaking; by arranging the hollow shielding frame 24, the weight and the manufacturing cost of the shielding frame 24 can be reduced, and the overall weight of the whole intelligent blackboard is further reduced; through setting up protection piece 25, can prevent to shelter from the terminal surface at both ends from exposing about frame 24, avoid the operator when clearing up intelligent blackboard, the department fish tail of frame 24 is sheltered from to the hand.

In the present embodiment, the protection member 25 is connected to the shielding frame 24 by a snap mechanism. The buckle mechanism is connected with the protection piece 25 and the shielding frame 24, so that the protection piece 25 and the shielding frame 24 can be conveniently disassembled and assembled.

Specifically, the fastening mechanism includes a connection buckle 251 and a connection bayonet 243 fastened to the connection buckle 251, the connection buckle 251 is disposed on the protective member 25, and the connection bayonet 243 is disposed on the shielding frame 24. Of course, the positions of the connection clip 251 and the connection clip 243 can also be interchanged, that is, the connection clip 251 is disposed on the shielding frame 24, and the connection clip 243 is disposed on the protection member 25.

Preferably, the cross section of the shielding frame 24 is rectangular, the shielding frame 24 has a first plate and a second plate perpendicular to the front side surface or the wall surface of the writing board 2, and a third plate and a fourth plate are connected between the first plate and the second plate, wherein the first plate and the second plate are both provided with connecting bayonets 243, the protection member 25 is provided with two rows of connecting buckles 251, and the number and the positions of the two rows of connecting buckles 251 correspond to the connecting bayonets 243 on the first plate and the second plate respectively.

Shielding frame 24 includes frame main body 244, and frame main body 244 is close to the protruding connection chimb 245 that is provided with in one side of clipboard 2, connects chimb 245 and is connected with the dorsal surface of clipboard 2. Preferably, connecting flange 245 is removably attached to the back side of tablet 2 by screws.

One side of the shielding frame 24 away from the wall surface is flush with the front side of the writing board 2. This design can make and shelter from frame 24 and do not bulge in the positive flank of clipboard 2, makes the front of whole wisdom blackboard pleasing to the eye.

In order to reduce the connection difficulty of the shielding frame 24 and the writing board 2, a second positioning column is convexly arranged on one side surface of the connecting convex edge 245 close to the writing board 2, a second positioning hole is formed in the back side surface of the writing board 2, and the second positioning column is in inserting fit with the second positioning hole. Of course, the positions of the second positioning column and the second positioning hole can also be interchanged, that is, the second positioning column is protruded from the back side of the writing board 2, and the second positioning hole is opened on the connecting flange 245.

Sheltering from frame 24 and still setting up butt chimb 246, butt chimb 246 butt is kept away from the terminal surface of the one end of electronic flat board 1 at clipboard 2, and butt chimb 246 does not bulge in the positive flank of clipboard 2.

The upper side and the lower side of the writing body 22 are respectively provided with a second upper frame 26 and a second lower frame 27, wherein the protecting member 25 positioned above the shielding frame 24 and the second upper frame 26 are parallel and level with one side surface of the writing body 22 away from the same, and the protecting member 25 positioned below the shielding frame 24 and the second lower frame 27 are parallel and level with one side surface of the writing body 22 away from the same.

In this embodiment, a first convex edge is convexly disposed on one side of the second upper border 26 abutting against the writing body 22, and the first convex edge is connected to the back side surface of the writing body 22; the second lower border 27 is provided with a second convex edge in a protruding manner on one side of the writing body 22, and the second convex edge is connected with the back side surface of the writing body 22. By providing the first convex edge and the second convex edge, the second upper frame 26 and the second lower frame 27 can be connected with the writing body 22 conveniently.

Specifically, the first convex edge and the second convex edge are both connected to the back side of the writing body 22 of the writing board 2 by screws. Of course, the first flange and the second flange are not limited to screw connection, and may be adhered to the back side of the writing body 22 of the writing board 2 by gluing.

The structure of the second upper frame 26 and the second lower frame 27 can be set to be consistent, the second upper frame 26 is hollow, two ends of the second upper frame 26 are provided with sockets communicated with the inside of the second upper frame 26, a first splicing member is arranged in the socket, the first splicing member partially extends out of the second upper frame 26, the first splicing member is of a strip structure, the part of the first splicing member inserted into the second upper frame 26 is connected with the second upper frame 26 through screws, the part of the first splicing member arranged out of the second upper frame 26 is connected with the second splicing member 28 through screws, the second splicing member 28 is of a plate shape, and the second splicing member is respectively connected with the first splicing member and the connecting convex edge 245 of the shielding frame 24 through screws.

In order to reduce the difficulty in assembling the second splicing member 28 with the first splicing member and the connecting flange 245, a third positioning column 281 is protruded from the second splicing member 28, and third positioning holes for inserting the third positioning column 281 are respectively formed in the first splicing member and the connecting flange 245. Of course, in other embodiments, the positions of the third positioning post 281 and the third positioning hole can be interchanged, that is, the third positioning post 281 is disposed on the first splicing member and the connecting flange 245, and the third positioning hole is opened on the second splicing member 28.

As shown in fig. 19 to 24, a camera assembly 6 is disposed on a back side surface of a cover plate 12 of an electronic flat panel 1, the camera assembly 6 includes a positioning member 61, a module bracket 62, a lens module 63 and a board bracket 64, wherein the positioning member 61 is disposed on the back side surface of the cover plate 12 of the display device, the positioning member 61 is provided with a positioning through hole 611, the module bracket 62 is connected to the positioning member 61, the module bracket 62 is provided with a mounting hole communicated with the positioning through hole 611, the lens module 63 is disposed in the mounting hole, the board bracket 64 is connected to a first upper frame 14 of the electronic flat panel 1, the board bracket 64 is fixed with a camera board 65 electrically connected to the lens module 63, and the board bracket 64 is further provided with a tightening portion 641 for tightening the lens module 63 in the mounting hole. Through setting up the setting element 61, can reduce the installation location degree of difficulty of module support 62, and under module support 62 and the combined action of supporting tight portion 641, can realize fixing lens module 63, need not additionally to set up screw or sticky fixed lens module 63, the lens module 63 dismouting of being convenient for, in addition, lens module 63 sets up the dorsal surface at apron 12, no longer set up in first frame 14, consequently, can not occupy the space of first frame 14, can reduce the volume of first frame 14, be convenient for realize the narrow frame setting.

In the present embodiment, the cover plate 12 is tempered glass.

In this embodiment, a through hole is formed on the cover plate 12 at a position corresponding to the lens module 63, and the through hole is communicated with the positioning through hole 611 on the positioning member 61, so that the lens module 63 can clearly shoot the front side surface of the cover plate 12. Of course, in other embodiments, the through hole formed on the cover plate 12 may be omitted, because the cover plate 12 is of a transparent structure, and even if the cover plate 12 is not provided with the through hole, the lens module 63 can also normally photograph the front side of the cover plate 12.

In order to reduce the fixing difficulty of the module bracket 62, a fourth positioning hole 612 may be further formed in the positioning member 61, a fourth positioning column is correspondingly protruded from one side of the module bracket 62 close to the positioning member 61, the fourth positioning column is inserted into the fourth positioning hole 612 to position the module bracket 62, and when the fourth positioning column on the module bracket 62 is inserted into the fourth positioning hole 612 on the positioning member 61, the mounting hole on the module bracket 62 corresponds to the positioning through hole 611 on the positioning member 61, that is, the module bracket 62 is mounted in place.

Of course, the positions of the fourth positioning column and the fourth positioning hole 612 can also be interchanged, that is, the fourth positioning column is disposed on the positioning member 61, and the fourth positioning hole 612 is opened on the module bracket 62.

The number of the fourth positioning columns and the number of the fourth positioning holes 612 can be two or more, so that the mounting position of the module bracket 62 is further limited, and the mounting difficulty of the module bracket 62 is reduced.

In the present embodiment, the positioning member 61 is adhered to the back side surface of the cover plate 12. The positioning element 61 is fixed in a sticking mode, so that the fixing difficulty of the positioning element 61 on the cover plate 12 can be reduced, and structures such as threaded holes and the like are avoided being formed in the cover plate 12.

The module holder 62 is adhered to the positioning member 61. In other embodiments, the module bracket 62 can also be fixed to the positioning member 61 by screws, fasteners, or the like.

Specifically, the mounting hole is a step hole, the step hole includes a first hole and a second hole which are sequentially arranged, the first hole is adjacent to the cover plate 12, the size of the first hole is smaller than that of the second hole, a step surface is formed between the first hole and the second hole, and an abutting surface which abuts against the step surface is arranged on the lens module 63. Through setting up the mounting hole as the step hole, be convenient for install lens module 63, prevent that lens module 63 from breaking away from module support 62, simultaneously under the effect of abutting portion 641 and step face, can fix lens module 63.

The card bracket 64 includes a first mounting plate 642, a second mounting plate 643, and a third mounting plate 644, the first mounting plate 642 is connected to the first upper frame 14, the second mounting plate 643 is connected to the first mounting plate 642 by the third mounting plate 644, and the camera card 65 is disposed on the second mounting plate 643.

In this embodiment, the first mounting plate 642 and the second mounting plate 643 are located at the same side of the third mounting plate 644, the fastening portion 641 includes a first fastening plate 6411 and a second fastening plate 6412 arranged at an included angle, one end of the first fastening plate 6411 away from the second fastening plate 6412 is connected to the third mounting plate 644 or the first mounting plate 642, and the second fastening plate 6412 is fastened to the lens module 63.

Specifically, the abutting portion 641, the first mounting plate 642, the second mounting plate 643 and the third mounting plate 644 are integrally formed by punching or bending a metal plate or integrally formed by injection molding plastic, so that the connection and assembly of the integrally formed structure can be reduced, the manufacturing process can be reduced, and the strength of the whole board card support 64 can be increased.

The first abutting plate 6411 and the second abutting plate 6412 are arranged in an acute angle, and the first abutting plate 6411 and the third mounting plate 644 are connected and located on the same plane.

The camera board card 65 is arranged on one side of the second mounting plate 643 away from the first mounting plate 642, the camera board card 65 is provided with a signal lamp 651, the corresponding signal lamp 651 is provided with a light guide column 66, the first end of the light guide column 66 extends to the position of the signal lamp 651, and the second end of the light guide column 66 extends to the position of the cover plate 12. Through setting up the light guide post 66, can transmit the light of the signal lamp 651 on the camera integrated circuit board 65 to apron 12 department, the suggestion user shoots the state.

Specifically, the second mounting plate 643 is provided with a light guide hole 6431, the light guide column 66 includes a light guide body 661 and a light guide column limiting portion 662 protruding from the outer wall of the light guide body 661, the first end of the light guide column 66 can pass through the light guide hole 6431 and abut against the camera board 65, and the light guide column limiting portion 662 abuts against one side of the second mounting plate 643 close to the camera board 65. Through setting up spacing portion 662 of leaded light hole 6431 and leaded light post, can be fixed leaded light post 66, need not to set up structure such as screw, adhesive and also can realize the fixed of leaded light post 66, reduced the dismouting degree of difficulty of leaded light post 66.

The light guide column stopper 662 is a plate-like structure that is annularly provided around the central axis of the light guide column 66 on the outer peripheral wall of the light guide column 66.

To prevent light from the light guide 66 from being dispersed, an opaque coating may be applied to the outer wall of the light guide 66 except for the end surfaces of the first and second ends.

As shown in fig. 25 to 29, corner pieces 110 are detachably disposed at two ends of a length direction of a first lower frame 17 of an electronic flat panel 1, the first lower frame 17 includes a lower frame body 171, the lower frame body 171 has a first side surface 1711 on the same side as a front side surface of a cover 12, supporting protrusions 172 for supporting the cover 12 and placement protrusions 173 for placing articles are disposed on the first side surface 1711 at intervals, a height of the supporting protrusions 172 protruding from the first side surface 1711 is L1, a height of the placement protrusions 173 protruding from the first side surface 1711 is L2, L2 is greater than L1, the placement protrusions 173 protrude from the front side surface of the cover 12, a receiving cavity 1714 is disposed in the lower frame body 171, a first opening 1715 communicating with the receiving cavity 1714 is disposed on an end surface of the lower frame body 171 connected to one end of the corner piece 110, the corner piece 110 includes a corner body 1101, the corner body 1101 can be inserted into the receiving cavity 1714 through the first opening 1715, the corner body 1101 is connected to the lower bezel body 171 by a screw, an arcuate projection 1102 and a connecting projection 1103 are provided so as to project from the corner body 1101, one end of the connecting projection 1103 abuts on the end portion of the support projection 172 in the longitudinal direction, the other end thereof abuts on the arcuate projection 1102, and one end of the arcuate projection 1102 away from the connecting projection 1103 abuts on the end portion of the placement projection 173 in the longitudinal direction. The protruding height of the placing convex part 173 from the first side surface 1711 is set to be greater than the protruding height of the supporting convex part 172 from the first side surface 1711, so that the placing convex part 173 can be used as a platform for placing articles such as pens, additional structures such as a pen box are not needed, the manufacturing and installation cost is reduced, and the placing convex part 173 is arranged to protrude from the front side surface of the cover plate 12, so that the supporting convex part 172 can be prevented from being scratched by hands when an operator takes the articles on the placing convex part 173, and the operator can be effectively prevented from being scratched by hands; the two ends of the first lower frame 17 in the length direction can be detached to form the corner pieces 110, the two ends of the first lower frame 17 can be plugged by the corner pieces 110, the manufacturing difficulty of the first lower frame 17 is reduced, meanwhile, the universality of the corner pieces 110 is high, the corner pieces can be applied to the first lower frames 17 with different lengths, and the requirements of electronic flat plates 1 with various sizes are met.

In this embodiment, the corner body 1101 has a corner side surface on the same side as the front side surface of the cover 12, the height of the connecting protrusion 1103 protruding out of the corner side surface is L3, L3-L1 is H4, H4 is not less than 0.1mm, the height of the arc-shaped protrusion 1102 connecting one end of the placement protrusion 173 protruding out of the corner side surface is L4, L4-L2 is H5, and H5 is not less than 0.1 mm. The design makes the surface of the part of the corner piece 110 exposed on the lower frame body 171 higher than the surface of the first lower frame 17, which can effectively prevent hand cutting.

Further, the height of the arc-shaped protrusion 1102 gradually decreases from the end of the connecting projection 173 to the end connected to the connecting projection 1103, and the height of the arc-shaped protrusion 1102 connected to the end of the connecting projection 1103 is equal to the height of the connecting projection 1103.

The arcuate convex portion 1102 has an abutment surface that abuts against an end surface of the lower bezel main body 171 that is connected to the corner fitting 110, and the shape of the abutment surface matches the shape of the end surface of the lower bezel main body 171 that is connected to the corner fitting 110. This design can make the appearance of the connection between the first lower rim 17 and the corner member 110 beautiful.

One end of the corner body 1101 inserted into the accommodating cavity 1714 is connected with a plugging portion 1105, the thickness of the plugging portion 1105 is smaller than that of the corner body 1101, a limiting step is formed between the plugging portion 1105 and the corner body 1101, the lower bezel body 171 is provided with a second side surface 1712 opposite to the first side surface 1711, and the limiting step is located on one side of the corner body 1101 close to the second side surface 1712 and is abutted to an end surface of the lower bezel body 171 provided with a first opening 1715. The arrangement of the limiting step can limit the insertion position of the corner body 1101 of the corner piece 110, and meanwhile, the insertion part 1105 can prolong the length of the corner piece 110 inserted into the accommodating cavity 1714, so that the connection stability is improved.

In this embodiment, the plugging portion 1105 has a threaded hole for screwing a screw, a through hole for passing the screw is formed on the second side 1712 of the lower frame body 171, and the screw passes through the through hole and is screwed into the threaded hole, so as to fix the plugging portion 1105 in the accommodating cavity 1714 of the lower frame body 171. Preferably, the screw is a countersunk head screw.

The connecting protrusion 1103 has a limiting protrusion 1104 protruding from a side surface of the cover plate 12, the electronic tablet 1 further includes an inner frame 111, the inner frame 111 is disposed on a back side surface of the cover plate 12, and the limiting protrusion 1104 is disposed on a side of the inner frame 111 away from the cover plate 12.

Further, the inner frame 111 includes frame strips respectively disposed on four sides of the cover plate 12, two adjacent frame strips are connected by a corner piece 112, and the corner piece 112 is disposed between the limit protrusion 1104 and the cover plate 12.

Specifically, the inner frame 111 is bonded to the cover plate 12, and the first lower frame 17 is connected to the inner frame 111 by screws. The inner frame 111 is connected with the cover plate 12 in a sticking mode, so that the inner frame 111 and the cover plate 12 can be prevented from being fixed by fasteners such as screws, the structure of the inner frame 111 is simplified, and the screws are arranged to connect the first lower frame 17 and the inner frame 111, so that the connection stability of the first lower frame 17 and the inner frame 111 can be enhanced.

Preferably, a third side 1713 is connected between the first side 1711 and the second side 1712 of the lower bezel body 171, the third side 1713 is close to the center of the display module, and the hook 174 is convexly arranged on the third side 1713; one side of the inner frame 111, which is far away from the cover plate 12, is provided with an inner frame bayonet 1111, and the hook 174 is clamped with the inner frame bayonet 1111. Through setting up pothook 174 and inner frame bayonet 1111, can reduce the equipment degree of difficulty of first lower frame 17 and inner frame 111, promote packaging efficiency.

In this embodiment, the hook 174 includes a hook body protruding from the third side 1713, a fastening portion protruding from one side of the hook body close to the inner frame 111 is inserted into the inner frame bayonet 1111, and the hook body is connected to the inner frame 111 through a screw.

The end surface of the support protrusion 172 at the end remote from the first side surface 1711 does not protrude from the front side surface of the cover 12. This design can further prevent the support protrusion 172 from scraping the hand of the operator, improving safety.

In this embodiment, an inclined transition surface or a circular arc transition surface is provided between the side of the supporting convex portion 172 close to the placing convex portion 173 and the first side surface 1711. The inclined transition surface or the arc transition surface is arranged, so that the edge structure of the supporting convex part 172 can be further reduced, and the hand scratch of an operator can be effectively prevented.

The placement convex portion 173 is perpendicular to the cover plate 12. This design ensures that the article can be stably placed on the placement protrusion 173.

In this embodiment, a side surface of the protruding part 173 close to the supporting protruding part 172 is an arc surface. Of course, the placing convex portion 173 is not limited to be provided with the arc-shaped surface, and may be provided with an inclined surface, such as: one side surface of the placing convex portion 173 close to the supporting convex portion 172 is an inclined surface, and the height of the end of the inclined surface connected with the first side surface 1711 is smaller than the height of the end of the inclined surface far from the first side surface 1711. Or, a receiving groove is concavely formed on one side of the placing convex portion 173 close to the supporting convex portion 172.

In other embodiments, the protruding part 173 may be disposed in an overall inclined structure, and an included angle between the protruding part 173 and the cover 12 is smaller than 90 degrees.

The display device further includes a functional module 7, a second opening 1716 communicated with the accommodating cavity 1714 is formed on the second side surface 1712 of the lower bezel body 171, and the functional module 7 is installed in the accommodating cavity 1714 through the second opening 1716.

The functional module 7 is mounted in the lower frame body 171, and the functional module 7 can be hidden and mounted while reasonably utilizing the space in the first lower frame 17.

Functional module 7 can be loudspeaker component or button subassembly, if functional module 7 is loudspeaker component, need set up the play sound hole of loudspeaker in first side 1711 corresponds the position, if functional module 7 is button subassembly, need set up the button hole that supplies the button to pass through in first side 1711 corresponds the position.

In a specific embodiment of the utility model, the wisdom blackboard includes two clipboards 2 of electronic flat panel 1, and two clipboards 2 set up respectively in the left and right sides of electronic flat panel 1, in other embodiments, can also set up an electronic flat panel 1 and a clipboard 2, and clipboard 2 sets up in the left side or the right side of electronic flat panel 1.

The electronic tablet 1 can be used for operations such as touch writing and picture video display of an operator, and the writing board 2 can be a blackboard or a whiteboard, or any plane board body which can be used for writing to present writing contents.

In the description herein, it is to be understood that the terms "upper" and the like are used in a descriptive sense and based on the orientation or positional relationship shown in the drawings for convenience in description and simplicity of operation, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, configuration and operation in a particular orientation, and therefore should not be construed as limiting the present invention.

In the description herein, references to the description of "an embodiment" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be appropriately combined to form other embodiments as will be appreciated by those skilled in the art.

The technical principle of the present invention is described above with reference to specific embodiments. The description is made for the purpose of illustrating the principles of the invention and should not be construed in any way as limiting the scope of the invention. Based on the explanations herein, those skilled in the art will be able to conceive of other embodiments of the present invention without any inventive effort, which would fall within the scope of the present invention.

Claims (19)

1. The utility model provides a smart blackboard, includes that electronic flat board and at least one concatenation are in the clipboard of electronic flat board one side, its characterized in that, electronic flat board includes display module and is located the first concatenation frame of the concatenation side of electronic flat board, display module includes the apron, first concatenation frame is installed in the dorsal surface of apron, the clipboard is including writing the body and being located the second concatenation frame of the concatenation side of clipboard, the second concatenation frame includes first deckle board, supports the clamp plate and connects the first deckle board with the second deckle board of clamp plate, first deckle board with write the dorsal surface of body and be connected, it supports tightly to support the clamp plate and is in the second concatenation frame keeps away from one side of apron;

the two ends of the first splicing frame in the length direction are both connected with first fixing pieces, the two ends of the second splicing frame in the length direction are both connected with second fixing pieces, the first fixing piece is provided with a first guide inclined plane, the second fixing piece is provided with a second guide inclined plane, a third fixing piece is arranged at the joint of the electronic flat plate and the writing board and comprises a clamping plate and two limiting plates which are arranged at the same side of the clamping plate at intervals, the clamping plate and the two limiting plates enclose a clamping groove, the first fixing piece and the second fixing piece are clamped in the clamping groove, the two limiting plates are respectively provided with a matching inclined surface corresponding to the first guiding inclined surface and the second guiding inclined surface, so that the third fixing piece can pull the first fixing piece and the second fixing piece to be attached to each other when being clamped with the first fixing piece and the second fixing piece.

2. The intelligent blackboard of claim 1, further comprising a reinforcing press block, wherein the reinforcing press block includes a press block body and two press block connectors, both of which are connected to the press block body;

the pressing plate is provided with at least one group of notch groups at intervals along the length direction, each group of notch groups comprises two avoidance notches, two pressing block connecting pieces are arranged in the avoidance notches respectively and connected with the first splicing frame through screws, and the pressing block body is tightly pressed against a side face, far away from the first splicing frame, of the pressing plate.

3. The intelligent blackboard according to claim 1, wherein the first fixing member includes a first connection portion and a first protrusion connected with each other, the first connection portion is connected with the first frame by a screw, and the first guide slope is provided on the first protrusion;

the second fixing piece comprises a second connecting portion and a second convex portion, the second connecting portion is connected with the second splicing frame through screws, and the second guide inclined plane is arranged on the second convex portion.

4. The intelligent blackboard of claim 3, wherein the first convex portion and the second convex portion are both provided with a splicing threaded hole, the clamping plate is provided with a splicing through hole, a splicing screw passes through the splicing through hole and is screwed in the splicing threaded hole, so that the clamping plate is respectively connected with the first convex portion and the second convex portion, and the axis of the splicing screw is parallel to the cover plate.

5. The intelligent blackboard according to claim 1, wherein the electronic flat board includes a first upper frame located above the display module, the display module further includes a back plate disposed on a back side of the cover plate, a wall hanging component is connected to a side of the back plate away from the cover plate, the wall hanging component includes a wall hanging board and a first wall hanging strip, the first wall hanging strip includes a third connecting portion and a fixing portion disposed at an included angle, the fixing portion is attached to a side of the back plate away from the cover plate, one end of the third connecting portion away from the fixing portion is connected to the first upper frame, the wall hanging board is fixed on a wall surface, a first hook with a downward opening is disposed on one side of the first wall hanging strip away from the back plate, and the first wall hanging strip is hung on the wall hanging board.

6. The intelligent blackboard of claim 5, wherein the backboard includes a base board, surrounding boards extend from four sides of the base board toward the cover board, a connecting board extends from one end of the surrounding boards away from the base board toward the outer side of the surrounding boards, the connecting board is connected with the first upper frame, a receiving groove is formed between the surrounding boards and the base board, and the connecting part is attached to one side of the receiving groove away from the surrounding boards.

7. The intelligent blackboard of claim 6, wherein the first upper frame is provided with a first rear casing, the first rear casing shields the first upper frame near a side of the first wall hanging strip and the surrounding plate is adjacent to the part of the first upper frame, the first rear casing is connected with the substrate, the first rear casing is provided with an avoiding groove corresponding to the connecting part, the third connecting part is inserted in the avoiding groove, a threaded hole is provided on the first upper frame, the third connecting part and the groove bottom of the avoiding groove are provided with a through hole corresponding to the threaded hole, and a screw passes through the through hole on the third connecting part and is screwed in the threaded hole after the through hole of the groove bottom of the avoiding groove.

8. The intelligent blackboard of claim 5, wherein the wall hanging plate includes a wall hanging frame and a hanging strip connected with each other, the wall hanging frame is disposed on the back side of the electronic tablet, the hanging strip is disposed on the back side of the writing plate, the length of the hanging strip extends along the horizontal direction, the back side of the writing plate is connected with a second wall hanging strip, and the second wall hanging strip is hung with the hanging strip.

9. The intelligent blackboard according to claim 1, wherein the display module further includes a back plate disposed on the back side of the cover plate, the back plate is rectangular, the back plate includes a base plate, surrounding plates extend from four sides of the base plate toward the same side of the base plate, a connecting plate extends from one end of the surrounding plate away from the base plate toward the outer side of the surrounding plate, and the surrounding plates include two first surrounding walls disposed at intervals in a vertical direction and two second surrounding walls disposed at intervals in a horizontal direction;

keep away from towards on the base plate one side punching press of bounding wall is formed with additional strengthening, additional strengthening includes girder, auxiliary girder and first strengthening rib, set up two along vertical direction extensions along its central symmetry on the base plate the girder, girder length direction's both ends extend to two respectively first leg, every the girder with be adjacent to the girder through one between the second leg the auxiliary girder is connected, the girder the auxiliary girder the second leg and be located the top form first reinforcement district between the first leg, be equipped with two on the base plate altogether first reinforcement district, every all be provided with in the first reinforcement district first strengthening rib.

10. The intelligent blackboard of claim 9, wherein the main beam, the sub-beam and the first reinforcing rib all protrude from one side of the base plate far away from the surrounding plate, the height of the main beam protruding from the base plate is H1, the height of the sub-beam protruding from the base plate is H2, the height of the first reinforcing rib protruding from the base plate is H3, wherein H2 < H1, and H3 is not more than H2.

11. The intelligent blackboard according to claim 1, wherein a shielding frame is detachably disposed at an end of the writing body away from the second splicing frame, the end of the shielding frame away from the writing body abuts against a wall surface, the shielding frame is a hollow frame structure, openings communicating the inside of the shielding frame are disposed at two ends of the shielding frame in a vertical direction, the end face of the shielding frame, which is provided with the opening, is a mounting end face, and the mounting end face is detachably disposed with a protection member for shielding the mounting end face and blocking the opening.

12. The intelligent blackboard of claim 11, wherein the protector is connected to the sheltering border by a snap mechanism.

13. The intelligent blackboard according to claim 11 to the above, wherein the side of the shielding frame away from the wall surface is flush with the front side of the writing body.

14. The intelligent blackboard of claim 1, wherein the electronic tablet is further provided with a camera assembly, the camera assembly comprises:

the positioning piece is arranged on the back side surface of the cover plate, and a positioning through hole is formed in the positioning piece;

the module bracket is connected with the positioning piece and is provided with a mounting hole communicated with the positioning through hole;

the lens module is arranged in the mounting hole;

the electronic flat board comprises a board card support, wherein the board card support is connected with a first upper frame of the electronic flat board, a camera board card electrically connected with the lens module is fixed on the board card support, and a tightly supporting part used for tightly supporting the lens module in the mounting hole is further arranged on the board card support.

15. The intelligent blackboard according to claim 14, wherein a fourth positioning post is protruded from one of the positioning member and the module holder, and a fourth positioning hole is formed in the other of the positioning member and the module holder for inserting and matching with the fourth positioning post.

16. The intelligent blackboard according to claim 14, wherein the positioning member is adhered to the back side of the cover plate; and/or the presence of a gas in the gas,

the module bracket is bonded on the positioning piece.

17. The intelligent blackboard according to claim 1, wherein a first lower frame is further disposed below the display module, and corner pieces are detachably connected to both ends of the first lower frame in the length direction;

the first lower frame comprises a lower frame body, the lower frame body is provided with a first side face which is the same as the front side face of the cover plate, supporting convex parts for supporting the cover plate and object placing convex parts for placing objects are arranged on the first side face in a protruding mode at intervals, the height of the supporting convex parts protruding out of the first side face is L1, the height of the object placing convex parts protruding out of the first side face is L2, L2 is larger than L1, the object placing convex parts protrude out of the front side face of the cover plate, an accommodating cavity is arranged in the lower frame body, and a first opening communicated with the accommodating cavity is formed in the end face, connected with one end of the corner piece, of the frame body;

the corner piece includes the turning body, the turning body can by first opening inserts hold the intracavity, the turning body pass through the screw with this body coupling of lower frame, the protruding arc convex part and the connection convex part of being provided with on the turning body, connect the one end of convex part with support the length direction's of convex part tip butt, the other end is connected the arc convex part, the arc convex part is kept away from connect the one end of convex part with put thing convex part length direction's tip butt.

18. The intelligent blackboard according to claim 17, wherein the corner body has a corner side face on the same side as the front side face of the cover plate, the height of the connecting protrusion protruding from the corner side face is L3, L3-L1 is H4, and H4 is not less than 0.1 mm; and/or the presence of a gas in the gas,

the height of one end of the arc-shaped convex part, which is connected with the placing convex part and protrudes out of the side face of the corner is L4, L4-L2 is H5, and H5 is not less than 0.1 mm.

19. The intelligent blackboard according to claim 17, wherein the height of the arc-shaped protrusion gradually decreases from the end connected with the protruding part toward the end connected with the protruding part, and the height of the arc-shaped protrusion connected with the end connected with the protruding part is equal to the height of the protruding part.

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