CN208602164U - Intelligent blackboard - Google Patents

Intelligent blackboard Download PDF

Info

Publication number
CN208602164U
CN208602164U CN201820978115.1U CN201820978115U CN208602164U CN 208602164 U CN208602164 U CN 208602164U CN 201820978115 U CN201820978115 U CN 201820978115U CN 208602164 U CN208602164 U CN 208602164U
Authority
CN
China
Prior art keywords
face
sliding
installation case
hardware installation
wisdom blackboard
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN201820978115.1U
Other languages
Chinese (zh)
Inventor
谭景焕
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Guangzhou Shiyuan Electronics Thecnology Co Ltd
Guangzhou Shirui Electronics Co Ltd
Original Assignee
Guangzhou Shiyuan Electronics Thecnology Co Ltd
Guangzhou Shirui Electronics Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Guangzhou Shiyuan Electronics Thecnology Co Ltd, Guangzhou Shirui Electronics Co Ltd filed Critical Guangzhou Shiyuan Electronics Thecnology Co Ltd
Priority to CN201820978115.1U priority Critical patent/CN208602164U/en
Application granted granted Critical
Publication of CN208602164U publication Critical patent/CN208602164U/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Landscapes

  • Drawing Aids And Blackboards (AREA)

Abstract

The utility model discloses a wisdom blackboard, including the board body, the board body has towards operator's first face and the second face relative with first face, and the second face sets up the hardware install bin, and the hardware install bin passes through sliding block set spare and second face sliding connection, has the operating position and roll-off to the outside maintenance position of board body that hide in the second face. The hardware installation box of the second face through with the wisdom blackboard sets up to sliding structure, can pull out the hardware installation box to the outside of wisdom blackboard when needs maintenance, can break away from the wisdom blackboard completely even, and the maintenance of being convenient for has promoted maintenance speed.

Description

Wisdom blackboard
Technical field
The utility model relates to intelligent electronic device technical field more particularly to a kind of wisdom blackboards.
Background technique
In teaching process, knowledge point would generally be presented in teacher in a manner of writing on the blackboard, in order to carry out to relevant knowledge Explanation, is also convenient for learner and intuitively carries out memory rational learning.Blackboard is the most common educational aid that writing on the blackboard is presented, at present In order to which writing on the blackboard is more intelligently presented, a kind of wisdom blackboard is proposed, wisdom blackboard not only includes that can be used for writing writing on the blackboard Clipboard (blackboard or blank), further includes the electronic plane that electronic document, picture, video can be presented, need during installation by Electronics usually is arranged in the back side of wisdom blackboard on wall or on support frame in integral installation after electronic plane and clipboard are assembled Plate hardware installation case.Existing wisdom blackboard has the disadvantage that 1, when wisdom blackboard is hung entirely through the mode of wall hanging It connects when on the wall hanging beam of wall, if wisdom blackboard breaks down, needing integrally to remove wisdom blackboard could be to hardware Installs case repairs, and increases maintenance difficulty, reduces maintenance speed.2, when wisdom blackboard is fixed on the support frame, out In security consideration, generally support frame and wisdom blackboard are integrally moved to close metope, therefore the narrow space of wisdom blackboard back side, If wisdom blackboard breaks down, wisdom blackboard and support frame can only be moved together to void spaces, it could be to hardware installation case It repairs, equally exists the maintenance difficulty high problem low with speed is repaired.
Utility model content
The purpose of the utility model embodiment is: providing a kind of wisdom blackboard, the hardware installation case of back side setting can The outside of wisdom blackboard is slid into, it is easy to repair, maintenance difficulty is reduced, maintenance speed is improved.
For this purpose, the utility model embodiment uses following technical scheme:
A kind of wisdom blackboard, including plate ontology be provided, the plate ontology have oriented manipulation person the first face and with it is described The second opposite face of first face, second face are arranged hardware installation case, the hardware installation case by slide block assembly with it is described Second face is slidably connected, the maintenance position for having the operating position being hidden in second face and sliding out to the plate body exterior It sets.
As a kind of preferred embodiment of wisdom blackboard, the slide block assembly is arranged adjacent to the edge of the plate ontology.
As a kind of preferred embodiment of wisdom blackboard, the slide block assembly includes two and is arranged in parallel and at interval sliding rail, Along its length through sliding slot is offered on the sliding rail, the opening of two sliding slots is opposite;The hardware installation case phase Pair both ends be inserted respectively into two sliding slots.
As a kind of preferred embodiment of wisdom blackboard, it is arranged between the hardware installation case and the slot bottom of the sliding slot several Directive wheel, the directive wheel are connected in the sliding slot or on the hardware installation case by shaft.
As a kind of preferred embodiment of wisdom blackboard, the sliding slot has the sliding slot head end for hardware installation case insertion The sliding slot end opposite with the sliding slot head end, the sliding slot end are provided with the limit for preventing the hardware installation case from skidding off Plate.
As a kind of preferred embodiment of wisdom blackboard, the slide block assembly includes sliding rail and sliding block, along it on the sliding rail Length direction opens up sliding slot, and the sliding block is slidably matched with the sliding slot, and one in both the sliding rail and the sliding block is solid It is scheduled on second face, another in both the sliding rail and the sliding block is fixed on the hardware installation case.
As a kind of preferred embodiment of wisdom blackboard, it is provided on the hardware installation case convenient for dragging the hardware installation The handle of case, the handle are fixed on the hardware installation case perpendicular on the side in second face.
As a kind of preferred embodiment of wisdom blackboard, the plate ontology is connect by overturning component with mounting surface, can be opposite It is overturn in the mounting surface.
As a kind of preferred embodiment of wisdom blackboard, the overturning component includes the wall hanging beam being fixed on the mounting surface With the hook with wall hanging beam mounting cooperation, the hook is fixed on the plate ontology, and the hook can be relative to described The rotation of wall hanging beam.
As a kind of preferred embodiment of wisdom blackboard, the top of the plate ontology is spaced the multiple institutes of setting along its length Hook is stated, the length of the wall hanging beam is horizontally extending, and interval setting is multiple on the wall hanging beam matches with the hook The wall hanging position of conjunction, each wall hanging position are provided with section wall hanging bar cylindrical.
The utility model embodiment has the beneficial effect that by setting the hardware installation case in the second face of wisdom blackboard to Hardware installation case can be drawn out to the outside of wisdom blackboard, it might even be possible to completely disengage intelligence by slide construction when needing repairing Intelligent blackboard, it is easy to repair, improve maintenance speed.
Detailed description of the invention
The utility model is described in further detail below according to drawings and examples.
Fig. 1 is the decomposition diagram of wisdom blackboard described in the utility model embodiment.
Fig. 2 is the structural schematic diagram of wisdom blackboard described in the utility model embodiment.
Fig. 3 is the decomposition diagram of the hardware installation case of wisdom blackboard described in the utility model embodiment.
Fig. 4 is that (hardware installation case is in work to the partial structural diagram of wisdom blackboard described in the utility model embodiment Make position).
Fig. 5 be the utility model embodiment described in wisdom blackboard partial structural diagram (hardware installation case be in inspection Repair position).
In figure:
1, plate ontology;11, main screen;12, vice screen;
2, hardware installation case;21, shell;22, it covers;23, power panel;24, mainboard;25, WIFI module;26, it touches and turns Fishplate bar;27, flange
3, wall hanging beam;4, it links up with;5, support plate;6, sliding rail;7, directive wheel.
Specific embodiment
The technical issues of to solve the utility model, the technical solution of use and the technical effect that reaches are clearer, It is described in further detail below in conjunction with technical solution of the attached drawing to the utility model embodiment, it is clear that described reality Applying example is only the utility model a part of the embodiment, instead of all the embodiments.Based on the embodiments of the present invention, It is practical new to belong to this for those skilled in the art's every other embodiment obtained without creative efforts The range of type protection.
In the description of the present invention, unless otherwise clearly defined and limited, term " connected ", " connection ", " Gu It is fixed " it shall be understood in a broad sense, for example, it may be being fixedly connected, it may be a detachable connection, or integral;It can be mechanical connect It connects, is also possible to be electrically connected;It can be directly connected, can also can be in two elements indirectly connected through an intermediary The interaction relationship of the connection in portion or two elements.For the ordinary skill in the art, it can be managed with concrete condition Solve the concrete meaning of above-mentioned term in the present invention.
In the present invention unless specifically defined or limited otherwise, fisrt feature the "upper" of second feature or it "lower" may include that the first and second features directly contact, and also may include that the first and second features are not direct contacts but lead to Cross the other characterisation contact between them.Moreover, fisrt feature includes above the second feature " above ", " above " and " above " One feature is right above second feature and oblique upper, or is merely representative of first feature horizontal height higher than second feature.First is special Sign is directly below and diagonally below the second feature including fisrt feature under the second feature " below ", " below " and " below ", or only Indicate that first feature horizontal height is less than second feature.
As shown in Fig. 1 to 5, the utility model embodiment provides a kind of wisdom blackboard, including plate ontology 1, and plate ontology 1 has Hardware installation case 2 is arranged in the first face of oriented manipulation person and the second face opposite with the first face, the second face, and hardware installation case 2 is logical It crosses slide block assembly to be slidably connected with the second face, there is the operating position being hidden in the second face and slides out to outside plate ontology 1 Overhaul position.By setting slide construction for the hardware installation case 2 in the second face of wisdom blackboard, can be incited somebody to action when needing repairing Hardware installation case 2 is drawn out to the outside of wisdom blackboard, it might even be possible to wisdom blackboard is completely disengaged, it is easy to repair, and improve maintenance Speed.
In the present invention, the outside (i.e. the outside of plate ontology 1) of wisdom blackboard refers to: along the front of wisdom blackboard When (i.e. the first face) is watched, the position do not blocked by plate ontology 1.
Plate ontology 1 specifically includes main screen 11 and the vice screen 12 of 11 left and right sides of main screen is arranged in, and main screen 11 is intelligent interaction Plate, surface use anti-dazzle tempered glass, realization can touch-control write also chalk-writing, vice screen 12 is clipboard, is used Anti-dazzle tempered glass, main screen 11 and vice screen 12 are spliced into the plate ontology 1 an of entirety by splice.Hardware installation case 2 is logical The back side that slide block assembly is slidably arranged in one of vice screen 12 is crossed, hardware installation case 2 is connect by connecting line with main screen 11, when When needing to repair hardware installation case 2, hardware installation case 2 is pulled to maintenance position by operating position, unclamps connecting line, Hardware installation case 2 can be repaired by removing on plate ontology 1.
Certain plate ontology 1 is not limited to the structure spliced using a main screen 11 and two vice screens 12, and connecting method uses m The form of a main screen 11 and the splicing of n vice screen 12, wherein m and n is natural integer, and m >=1, n >=1.And connecting method Being can be to be a variety of, and if main screen 11 is in centre, two vice screens 12 are located at main screen 11 in the left and right sides or two vice screens 12 respectively The same side.
In a preferred embodiment of the utility model, slide block assembly is arranged adjacent to the edge of plate ontology 1.It will slide Block easily facilitates hardware installation case 2 and takes out and be inserted into, reduce maintenance difficulty adjacent to the edge of plate ontology 1.
Plate ontology 1 has top side, the bottom side opposite with top side and is connected to top side and bottom Connection side between side, slide block assembly is adjacent to connection side.
The sliding trace of hardware installation case 2 can be horizontally disposed with, and can also be vertically arranged, can also be along horizontal by a clamp The direction at angle is arranged.The sliding trace of hardware installation case 2 is preferably horizontally disposed, in this way after hardware installation case 2 is inserted in place, No longer needing to be arranged additional fixed structure also can make hardware installation case 2 be fixed on the second face, convenient for operation.
In another preferred embodiment of the utility model, slide block assembly includes two and is arranged in parallel and at interval cunning Rail 6, along its length through sliding slot is offered on sliding rail 6, the opening of two sliding slots is opposite;Hardware installation case 2 it is opposite two End is inserted respectively into two sliding slots.Hardware installation case 2 directly cooperates with sliding slot, not only may be implemented to slide, can also reduce The use of part reduces production cost.
In order to keep the sliding of hardware installation case 2 more smooth, several lead is set between hardware installation case 2 and the slot bottom of sliding slot To wheel 7, directive wheel 7 is connected in sliding slot or on hardware installation case 2 by shaft.
In the present embodiment, one of vice screen 12 being corresponded on the second face and being provided with support plate 5, support plate 5 is far from second The one side in face is concordant with the jamb surface of plate ontology 1, and support plate 5 is detachably connected by screw and frame, and utilizes double Face glue is Nian Jie with the second face.Parallel along the vertical direction and two sliding rails 6 of interval setting, the sliding slot of each sliding slot in support plate 5 Head end is provided with the limit plate for preventing hardware installation case 2 from skidding off adjacent to the connection side of plate ontology 1, sliding slot end.
In other embodiments, sliding block can also be additionally set and sliding slot cooperates, specifically, slide block assembly includes sliding rail 6 And sliding block, sliding slot is opened up along its length on sliding rail 6, and sliding block is in sliding fit with the sliding chute, one in both sliding rail 6 and sliding block It is fixed on the second face, another in both sliding rail 6 and sliding block is fixed on hardware installation case 2.
Hardware installation case 2 is arranged in close to the side in the second face in sliding block, and the sliding slot on sliding rail 6 is dovetail groove, sliding block Structure and the structure of sliding slot match.
In another preferred embodiment of the utility model, it is provided on hardware installation case 2 convenient for dragging hardware peace The handle of vanning 2, handle are fixed on hardware installation case 2 perpendicular on the side in the second face.
In other embodiments, convex is equipped with flange 27 on hardware installation case 2, when hardware installation case 2 is located at working position When setting, flange 27 is connected on the outside of the sliding slot head end of sliding slot.
In another preferred embodiment of the utility model, hardware installation case 2 includes equipped with the shell 21 being open, sets One of shell 21 far from the second face is arranged in the capping 22 of the hardware being placed in shell 21 and selective shut-off opening, capping 22 Side.
Shell 21 is formed using the welding of sheet metal parts, and structure is rectangular box structure, and connecting line access is provided on shell 21 Mouthful, shell 21 is mainly used for mounting hardware, is in sliding fit with the sliding chute and fixes capping 22, and capping 22 is also made of sheet metal component, It can be directly connected to using bolt with shell 21, can also be connect with the structure that hinge cooperates with shell 21 using bolt, real The structure that now capping 22 can be overturn relative to shell 21.Hardware is mainly electronics board, such as power panel 23, mainboard 24, WIFI Module 25, touch pinboard 26 etc..All hardware is integrated in a shell 21 using hardware installation case 2, may be implemented to collect Cheng Hua convenient for cabling, reduces other support metal plate brackets, reduces cost.
In another preferred embodiment of the utility model, plate ontology 1 is connect by overturning component with mounting surface, can It is overturn relative to mounting surface.It, can be in wisdom blackboard integral installation in mounting surface by setting plate ontology 1 to structure may be reversed When on (such as metope), if wisdom blackboard breaks down, it is only necessary to plate ontology 1 flip an angle, then by the hard of the second face Part installs case 2 be drawn out to plate ontology 1 outside can to the hardware in hardware installation case 2 carry out inspection and maintenance, do not need by Wisdom blackboard integral demounting, reduces maintenance difficulty, improves maintenance speed.
In the present embodiment, overturning component includes the wall hanging beam 3 being fixed on mounting surface and cooperates with the mounting of wall hanging beam 3 Hook 4, hook 4 are fixed on plate ontology 1, and hook 4 can be rotated relative to wall hanging beam 3.
The top of plate ontology 1 is spaced the multiple hooks 4 of setting along its length, and the length of wall hanging beam 3 is prolonged in the horizontal direction It stretches, the multiple wall hanging positions with 4 cooperation of hook of interval setting on wall hanging beam 3, it is cylindrical that each wall hanging position is provided with section Wall hanging bar.Hook 4 is arranged in the top of plate ontology 1, so that the bottom of plate ontology 1 is in free state, plate ontology 1 can be by Down toward upper overturning, make the rotary movement of plate ontology 1 more safe and laborsaving in this way.
The reverses direction of plate ontology 1 is not limited to overturn from the bottom to top, can also from top to bottom overturn, from left to right overturning or Person overturns from right to left, it is only necessary to change position of the overturning component on plate ontology 1.When plate ontology 1 is from top to bottom overturn When, in order to increase the safety in switching process, connecting rod can be set between plate ontology 1 and mounting surface, and connecting rod is can Stretching structure, can be with the overturning angle between limiting plate ontology 1 and mounting surface.And when plate ontology 1 from left to right or by it is right extremely When left overturning, auxiliary support assemblies can be set in opposite one end that plate ontology 1 is equipped with overturning component, auxiliary support assemblies can It is connect with metope, when needing to overturn, auxiliary support assemblies and plate ontology 1 are detached from, and when needing fixed plate ontology 1, will be assisted Support component is connect with plate ontology 1, the fixation of stiffening plate ontology 1, reduces the pressure of 1 pair of plate ontology overturning component.
In other embodiments, plate ontology 1 can also be connect by wall hanging board with foot prop, i.e., plate ontology 1 is not turnover Structure, hardware installation case 2 are slidable structure.
In assembly, first by installations such as each hardware such as power panel 23, mainboard 24, WIFI module 25, touch pinboard 26 Into the shell 21 of hardware installation case 2, capping 22 is fixed, completes the installation of hardware installation case 2;Support plate 5 is installed to again It in one of vice screen 12 of the plate ontology 1 of wisdom blackboard, then will be installed in support plate 5 equipped with the sliding rail 6 of directive wheel 7, most Hardware installation case 2 is inserted into afterwards in the sliding slot of sliding rail 6.
When wisdom blackboard needs repairing, the flange 27 on hardware installation case 2 is pulled, hardware installation case 2 is completely disengaged Sliding slot removes connecting line, hardware installation case 2 can be removed, and hardware installation case 2 is repaired or debugged, such as the institute of Fig. 2 and 5 Show.
In the description of this article, it is to be understood that the orientation or positional relationships such as term " on " are based on the figure Orientation or positional relationship is merely for convenience of description and simplification operation, rather than the device or element of indication or suggestion meaning must There must be specific orientation, be constructed and operated in a specific orientation, therefore should not be understood as limiting the present invention.
In the description of this specification, the description of reference term " embodiment " etc. means the specific spy in conjunction with the embodiment Sign, structure, material or feature are contained at least one embodiment or example of the utility model.In the present specification, right The schematic representation of above-mentioned term is not necessarily referring to identical embodiment.
In addition, it should be understood that although this specification is described in terms of embodiments, but not each embodiment is only wrapped Containing an independent technical solution, this narrating mode of specification be only be to understand device, those skilled in the art should It considers the specification as a whole, the technical solutions in the embodiments can also be appropriately combined, and forming those skilled in the art can With the other embodiments of understanding.
Technical principle of the utility model has been described above with reference to specific embodiments.These descriptions are intended merely to explain this reality With novel principle, and it cannot be construed to the limitation to scope of protection of the utility model in any way.Based on the explanation herein, Those skilled in the art, which does not need to pay for creative labor, can associate with other specific implementation modes of this utility model, These modes are fallen within the protection scope of the utility model.

Claims (10)

1. a kind of wisdom blackboard, including plate ontology, the plate ontology have oriented manipulation person the first face and with first face Hardware installation case is arranged in the second opposite face, second face, which is characterized in that the hardware installation case by slide block assembly with Second face is slidably connected, the inspection for having the operating position being hidden in second face and sliding out to the plate body exterior Repair position.
2. wisdom blackboard according to claim 1, which is characterized in that the slide block assembly is adjacent to the side of the plate ontology Edge setting.
3. wisdom blackboard according to claim 1, which is characterized in that the slide block assembly includes that two parallel and interval is set The sliding rail set, along its length through sliding slot is offered on the sliding rail, the opening of two sliding slots is opposite;The hardware The opposite both ends of installs case are inserted respectively into two sliding slots.
4. wisdom blackboard according to claim 3, which is characterized in that the slot bottom of the hardware installation case and the sliding slot it Between several directive wheels are set, the directive wheel is connected in the sliding slot or on the hardware installation case by shaft.
5. wisdom blackboard according to claim 3, which is characterized in that the sliding slot has to be inserted into for the hardware installation case Sliding slot head end and the sliding slot end opposite with the sliding slot head end, the sliding slot end, which is provided with, prevents the hardware installation case The limit plate skidded off.
6. wisdom blackboard according to claim 1, which is characterized in that the slide block assembly includes sliding rail and sliding block, described Sliding slot is opened up on sliding rail along its length, the sliding block is slidably matched with the sliding slot, both the sliding rail and the sliding block In one be fixed on second face, another in both the sliding rail and the sliding block is fixed on the hardware installation case On.
7. wisdom blackboard according to any one of claims 1 to 6, which is characterized in that be provided on the hardware installation case Convenient for dragging the handle of the hardware installation case, the handle is fixed on the hardware installation case perpendicular to the side in second face On face.
8. wisdom blackboard according to any one of claims 1 to 6, which is characterized in that the plate ontology passes through overturning component It connect, can be overturn relative to the mounting surface with mounting surface.
9. wisdom blackboard according to claim 8, which is characterized in that the overturning component includes being fixed on the mounting surface On wall hanging beam and hook with wall hanging beam mounting cooperation, the hook is fixed on the plate ontology, and the hook can It is rotated relative to the wall hanging beam.
10. wisdom blackboard according to claim 9, which is characterized in that the top of the plate ontology along its length between Every multiple hooks are arranged, the length of the wall hanging beam is horizontally extending, and interval setting is multiple on the wall hanging beam With the wall hanging position of the hook cooperation, each wall hanging position is provided with section wall hanging bar cylindrical.
CN201820978115.1U 2018-06-22 2018-06-22 Intelligent blackboard Active CN208602164U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201820978115.1U CN208602164U (en) 2018-06-22 2018-06-22 Intelligent blackboard

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201820978115.1U CN208602164U (en) 2018-06-22 2018-06-22 Intelligent blackboard

Publications (1)

Publication Number Publication Date
CN208602164U true CN208602164U (en) 2019-03-15

Family

ID=65665758

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201820978115.1U Active CN208602164U (en) 2018-06-22 2018-06-22 Intelligent blackboard

Country Status (1)

Country Link
CN (1) CN208602164U (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111636881A (en) * 2020-05-22 2020-09-08 湖北工业大学 Shield tail clearance monitoring device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111636881A (en) * 2020-05-22 2020-09-08 湖北工业大学 Shield tail clearance monitoring device

Similar Documents

Publication Publication Date Title
CN202774955U (en) Multifunctional platform provided with automatic lifting snapshot instrument
CN201576411U (en) Box body and led display module
CN202674777U (en) Preceding-maintenance-type liquid crystal video wall splicing device
CN208602164U (en) Intelligent blackboard
CN208689482U (en) A kind of student's tablet computer of sliding cover type double-sided screen
CN108304098A (en) A kind of module plug-in type electronic blackboard
CN102208154A (en) Display with detachable frame
CN106659005B (en) Cabinet, LED display and LED mosaic screen
CN208705847U (en) A kind of module plug-in type electronic blackboard
CN208225030U (en) A kind of family can the study nanometer blackboard that touches of writing on the blackboard
CN208646421U (en) Intelligent blackboard
CN110750133A (en) Hidden server front window liquid crystal display mounting structure
CN201085269Y (en) Assembled combination cabinet
CN1317926C (en) Inserted hanging door type cabinet
CN209683581U (en) A kind of high impedance vehicular touch screen
CN2821674Y (en) BTX casing structure
CN2855195Y (en) Multimedia platform
CN209267462U (en) A kind of tangible formula liquid crystal display of energy storage inverter
CN207037539U (en) A kind of take-up of three screens notebook and three screen notebooks
CN208646429U (en) Plate fixing structure and intelligent blackboard comprising same
CN207946738U (en) A kind of Portable hand computer cabinet
CN103646616B (en) Maintained LED display screen before a kind of
CN208664703U (en) Concatenation intelligence writing device
CN2671002Y (en) Master casing of drawer computer
CN216635963U (en) A wisdom blackboard for wisdom teaching

Legal Events

Date Code Title Description
GR01 Patent grant
GR01 Patent grant