CN105427681B - A kind of Mobile multimedia tutoring system - Google Patents
A kind of Mobile multimedia tutoring system Download PDFInfo
- Publication number
- CN105427681B CN105427681B CN201510898322.7A CN201510898322A CN105427681B CN 105427681 B CN105427681 B CN 105427681B CN 201510898322 A CN201510898322 A CN 201510898322A CN 105427681 B CN105427681 B CN 105427681B
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- guide rail
- projection screen
- bearing
- actuating unit
- projecting apparatus
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09B—EDUCATIONAL OR DEMONSTRATION APPLIANCES; APPLIANCES FOR TEACHING, OR COMMUNICATING WITH, THE BLIND, DEAF OR MUTE; MODELS; PLANETARIA; GLOBES; MAPS; DIAGRAMS
- G09B5/00—Electrically-operated educational appliances
- G09B5/02—Electrically-operated educational appliances with visual presentation of the material to be studied, e.g. using film strip
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B21/00—Projectors or projection-type viewers; Accessories therefor
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- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Business, Economics & Management (AREA)
- Educational Administration (AREA)
- Educational Technology (AREA)
- Theoretical Computer Science (AREA)
- Projection Apparatus (AREA)
- Displays For Variable Information Using Movable Means (AREA)
Abstract
The present invention relates to a kind of Mobile multimedia tutoring systems, it includes computer（1）, removable projection screen subsystem（2）With removable projector sub-system（3）, move projection screen subsystem（2）Including projection screen（21）, actuating unit A（22）, guide rail A（23）With guide rail B（24）, guide rail B（24）Compared with guide rail A（23）Tilt installation, actuating unit A（22）Drive projection screen（21）In guide rail A（23）With guide rail B（24）Upper slip；Projector sub-system（3）Middle projecting apparatus（31）Rotatable holding and projection screen（21）Face, computer（1）Control connection actuating unit A respectively（22）, actuating unit B（32）And projecting apparatus（31）.The present invention makes student watch multimedia while can also clearly see more writings on the blackboard, improves classroom teaching efficiency；There is better viewing visual angle when the classmate of classroom both sides can also be made to watch multimedia simultaneously.
Description
Technical field
The present invention relates to Teaching Technology of Multimedia fields, particularly a kind of Mobile multimedia tutoring system.
Background technology
Multimedia teaching is a kind of teaching method being combined using a variety of electronic instruction media and Traditional teaching means, because
It has the characteristics that picture and text acoustic image and cyclopentadienyl, and can be from the mood, attention and interest of multi-angle mobilizing students, and is widely used
It imparts knowledge to students in campus.
In teaching process, the centre of blackboard is most commonly used place, and blackboard top and bottom are due to the inconvenience of writing
Or the line-of-sight problems of student are not frequently used, and during use projector equipment, projection screen will more block a blackboard part, so
Cause script fewer with regard to the smaller utilizable area of blackboard, it, can not be complete by the content of courses when written contents are more
Whole is written on blackboard.This teaching means has the following problems in the implementation process of classroom：1st, projection screen shelters from
Part blackboard, when teacher's writing on the blackboard in order to allow left and right classmate can see writing on the blackboard clearly when, it is necessary to rise and close projection screen
Close projecting apparatus；When needing to watch instructional media, projection screen is declined again and opens projecting apparatus；This process has occupied
The time in classroom of limit, affects teaching efficiency, reduces classroom teaching efficiency.2nd, when teacher is for writing on the blackboard, by projection screen quilt
After withdrawal, classmates cannot watch teaching projection.3rd, since projection screen size is limited, and present classroom is all compared
Greatly, it is very inconvenient when watching multimedia for the classmate of classroom front row both sides for being sitting in.
The content of the invention
The shortcomings that it is an object of the invention to overcome the prior art, provides a kind of Mobile multimedia tutoring system.This is
Projection screen and projecting apparatus are arranged to packaged type by system, can not effectively be used or projection screen when blackboard is projected screen and covers
Viewing visual angle it is bad when, adjustable projection screen makes it be moved to suitable angle beside the trend, and blackboard is made effectively to use
Area maximizes, and to realize the instructional function of blackboard, and ensures that classmates watch the best effective of black board teaching and multimedia teaching
Fruit；When only needing projection screen aided education, and can projection screen quickly and easily be adjusted back into original place.
The purpose of the present invention is achieved through the following technical solutions：A kind of Mobile multimedia tutoring system, it includes meter
Calculation machine, removable projection screen subsystem and removable projector sub-system, the removable projection screen subsystem include
Projection screen, actuating unit A, guide rail A and guide rail B, the actuating unit A, guide rail A and guide rail B are each attached on wall, lead
Rail A is installed parallel to blackboard, and guide rail B is tilted compared with guide rail A and installed in the one side of guide rail A, guide rail B, the both ends of projection screen
It is slidably arranged in respectively on guide rail A and guide rail B, projection screen is also connected with actuating unit A, is thrown under the driving of actuating unit A
Shadow screen slides on guide rail A and guide rail B, and the removable projector sub-system includes projecting apparatus and actuating unit B, removable
Dynamic projector sub-system is fixed on the ceiling, and projecting apparatus is fixed on the output terminal of actuating unit B, and actuating unit B drives projection
Instrument rotates so that projecting apparatus and projection screen face, the computer control respectively connection actuating unit A, actuating unit B and
Projecting apparatus.
Certain angle between guide rail B and guide rail A is set, projection screen can be made to shift to one side and the rotation one in religion classroom
Determine angle.So on the one hand reduce projection screen to block blackboard so that blackboard is maximized using area, convenient for seeing simultaneously
See the content on teaching board content and projection screen；On the other hand, projection screen rotates by a certain angle, front-seat same convenient for classroom
Have optimal viewing visual angle when watching projection screen, and guide rail B and guide rail A corner dimensions can be decided according to the actual requirements.It throws
Projecting apparatus is also with rotating by a certain angle while shadow screen rotation so that projecting apparatus and projection screen face ensure projection effect
Fruit.When being moved in view of projection screen, classmates can also be allowed to see teaching projection clearly, projection screen translational speed cannot be too fast, speed
Degree can be controlled in below 10mm/s.
Preferably, the actuating unit A includes stepper motor A, bearing A, synchronizing jugged belt wheel, synchronous cog belt and base
Seat, the pedestal are fixed on the wall, and stepper motor A and bearing A are each attached on pedestal, and bearing A is mounted on stepper motor A
Output terminal, synchronizing jugged belt wheel and bearing A cooperation installs, and synchronous cog belt is fitted on synchronizing jugged belt wheel, is projected
Screen be fixedly connected on it is synchronizing jugged take, computer control connection stepper motor A.Pedestal uses HT150 cast sheets,
And channel steel is welded on it, the mounting surface of milling channel steel after welding, to ensure the installation accuracy of bearing A.
Compared with traditional V belt translation, chain drive, gear drive, in Synchronous Belt Drives, the work of synchronous cog belt
With teeth on face, the wheel rim surface of synchronizing jugged belt wheel is also equipped with corresponding tooth socket, engages to pass by between band and belt wheel
Movement and power are passed, fricton-tight, pretightning force is small, can guarantee constant gearratio, ensures Synchronous Transmission, and simple in structure, at low cost.
For synchronous cog belt usually using steel wire rope or glass cord as bearing bed (endless belt), neoprene or polyurethane are body,
With thin and light, intensity is big, and elongation is small, easy to use, transmission efficiency, and in addition in this programme transmission process, centre connects
Connection member is few, further improves transmission efficiency.Transmission speed is low in the design, by the weight of guide rail carrying projection screen, so
Synchronous cog belt load is extremely low, can directly select finished product.
Preferably, idler wheel is set on the guide rail A and guide rail B, and projection screen passes through Quick connection ring and universal hook and rolling
Wheel connection.Wooden sliding door exclusive guideway can be selected in guide rail, and idler wheel uses the mating rubber roll of guide rail.Projection screen is in moving process
In have certain rotational angle, therefore suspension parts selects universal hook, and is connected with the ring that connects on Quick connection ring and projection screen top
It connects.Quick connection ring and universal hook material are 304 stainless steels.
Preferably, the actuating unit B includes stepper motor B, gear shaft A, gear shaft B, bearing B, bearing C, babinet
And axle bed, the projecting apparatus are provided outside projector frame, projector frame is manufactured up and down using hot rolled steel plate, and surrounding passes through
Steel plate welds, and corner is welded with angle bar, and gear shaft A is connected to the output terminal of stepper motor B, and gear shaft B engages biography with gear shaft A
Dynamic, one end of gear shaft B is arranged on by bearing B on babinet, on the outside of bearing B bearing (ball) cover A, bearing (ball) cover A is set to be fixed on
On babinet, the other end of gear shaft B is arranged on by bearing C on bearing (ball) cover B, and bearing (ball) cover B is fixed on babinet, gear shaft
The output terminal of B is connected by axle bed with projector frame.The babinet is fixed on the ceiling, and for dust-proof, material uses
HT150；Axle bed is cast using HT200, is radially got through hole, is connected by bolt with the shaft end of gear shaft B.Because of bearing B and bearing C
Axial force and radial load are born simultaneously, therefore select angular contact ball bearing.
Preferably, synchronizing jugged take is provided with synchronous cog belt set, and projection screen upper end is provided with hook, projection
Screen is connected by hook and synchronous cog belt set.
Preferably, the Mobile multimedia tutoring system further includes remote controler, and the computer includes electric control gear,
Electric control gear is used to receive the signal of remote controler and controls actuating unit A, actuating unit B and projecting apparatus.Electric control gear is single with 51
Piece machine is core, by the reception to infrared signal (remote controler) and travel switch signal etc., to stepper motor A, stepper motor B
It is controlled with projecting apparatus.
The present invention has the following advantages：
1st, projection screen and projecting apparatus are arranged to packaged type by the present invention, in use, projection screen and projecting apparatus rotate
Angle cooperates so that classmates are watching multimedia while can also clearly see more writings on the blackboard, reduce projection
The switching of screen and black board teaching pattern improves the efficiency of teaching in classroom；It can also make the classmate of classroom both sides can be more preferable simultaneously
Viewing projection screen on the content of courses.
2nd, system structure is simple, at low cost, transmission efficiency：Synchronous cog belt is used in removable projection screen subsystem
Transmission, compared with traditional V belt translation, chain drive, gear drive, by nibbling between synchronous cog belt and synchronizing jugged belt wheel
It closes to transfer movement and power, fricton-tight, pretightning force is small, can guarantee constant gearratio, ensures Synchronous Transmission, simple in structure, into
This is low；And synchronous cog belt is usually using steel wire rope or glass cord as bearing bed (endless belt), neoprene or polyurethane
For body, with thin and light, intensity is big, and elongation is small, easy to use, transmission efficiency, in addition, connection among transmission mechanism
Component is few, further improves transmission efficiency.
Description of the drawings
Fig. 1 is the structure diagram of Mobile multimedia tutoring system of the present invention；
Fig. 2 is the front view that projection screen subsystem is moved in the present invention；
Fig. 3 is the top view that projection screen subsystem is moved in the present invention；
Fig. 4 is the partial sectional view that projector sub-system is moved in the present invention；
Fig. 5 is the classroom planar structure schematic diagram investigated in the specific embodiment of the invention；
Fig. 6 is in structure diagram during different position for projection screen in the specific embodiment of the invention；
In figure：1- computers, 2- move projection screen subsystem, 21- projection screens, 211- hooks, 22- actuating units
The synchronizing jugged belt wheel of A, 221- stepper motor A, 222- bearing A, 223-, 224- synchronous cog belts, 225- pedestals, 226- synchronous gears
Shape band set, 23- guide rails A, 24- guide rail B, 25- idler wheel, 26- Quick connection rings, the universal hooks of 27-, 3- move projector sub-system,
31- projecting apparatus, 311- projector frames, 32- actuating units B, 321- stepper motor B, 322- gear shaft A, 323- gear shaft B,
324- bearings B, 325- bearing C, 326- babinet, 327- axle beds, 328- bearing (ball) covers A, 329- bearing (ball) cover B, 4- blackboard, 5- are said
Platform, 6- first rows seat, 7-, the left walls of 8-, the right walls of 9-, distance of the right walls of a- away from blackboard, the width of b-, the length of c- blackboards
Degree, the width of d- projection screens, distance of the e- projecting apparatus away from projection screen, distance of the f- dais away from first row seat, g- projections
Screen is away from first row seat distances, distance of the left walls of h- apart from blackboard, the length in l- classrooms, the width in m- classrooms.
Specific embodiment
The present invention will be further described below in conjunction with the accompanying drawings, but protection scope of the present invention is not limited to following institute
It states.
As shown in Figure 1 to 4, a kind of Mobile multimedia tutoring system, it includes computer 1, removable projection screen
Subsystem 2, removable projector sub-system 3 and remote controler.
The removable projection screen subsystem 2 includes projection screen 21, actuating unit A22, guide rail A23 and guide rail
B24, the actuating unit A22, guide rail A23 and guide rail B24 are each attached on wall, and guide rail A23 is installed parallel to blackboard 4,
Guide rail B24 is tilted compared with guide rail A23 and installed in the one side of guide rail A23, guide rail B24, on the guide rail A23 and guide rail B24
Idler wheel 25 is set, and projection screen 21 is connected by Quick connection ring 26 and universal hook 27 with idler wheel 25.Quick connection ring 26 and universal hook
27 materials are 304 stainless steels.Projection screen 21 is also connected with actuating unit A22, the projection screen under the driving of actuating unit A22
Curtain 21 is slided and rotated by a certain angle on guide rail A23 and guide rail B24.
Certain angle between guide rail B24 and guide rail A23 is set, projection screen 21 can be made to shift to the one side in religion classroom simultaneously
It rotates by a certain angle.So on the one hand reducing the blocking to blackboard 4 of projection screen 21 so that blackboard 4 is maximized using area,
Convenient for watching the content in teaching board content and projection screen 21 simultaneously；On the other hand, projection screen 21 rotates by a certain angle,
There is optimal viewing visual angle when watching projection screen 21 convenient for classroom front row classmate.When being moved in view of projection screen 21,
Classmates can be allowed to see teaching projection clearly, 21 translational speed of projection screen cannot be too fast, and speed can be controlled in below 10mm/s.
To determine position that projection screen 21 moves, acquisition investigation is carried out to classroom design size between more, Fig. 5 is acquisition
The classroom planar structure schematic diagram of investigation, table 1 are classroom design sizes.Wherein Room 5113 are using Mobile multimedia teaching system
The best classroom of effect after system.Present embodiment determines the optimal mobile position of projection screen 21 by taking 5113 classrooms as an example
It puts, dotted line is the optimal shift position of the projection screen 21 according to obtained by mapping the size in 5113 classrooms in Fig. 6, according to actual mapping
The angle for drawing guide rail B24 and guide rail A23 is 11 °.
1 classroom design size of table
As shown in Figures 2 and 3, the actuating unit A22 includes stepper motor A221, bearing A222, synchronous cog belt
Wheel 223, synchronous cog belt 224 and pedestal 225, the pedestal 225 are fixed on the wall, stepper motor A221 and bearing A222
It is each attached on pedestal 225, bearing A222 is mounted on the output terminal of stepper motor A221, synchronizing jugged belt wheel 223 and bearing
A222 cooperation installations, synchronous cog belt 224 are fitted on synchronizing jugged belt wheel 223, are provided on synchronous cog belt 224 same
Toothed belt set 226 is walked, 21 upper end of projection screen is provided with hook 211, and projection screen 21 passes through hook 211 and synchronous cog belt set
226 connections.Pedestal 225 uses HT150 cast sheets, and welds channel steel on it, the mounting surface of milling channel steel after welding, to ensure
The installation accuracy of bearing A222.
As shown in figure 4, the removable projector sub-system 3 includes projecting apparatus 31 and actuating unit B32, projecting apparatus 31
The output terminal of actuating unit B32 is fixed on, actuating unit B32 drives projecting apparatus 31 to rotate so that projecting apparatus 31 and projection screen
21 faces.Removable projector sub-system 3 is fixed on the ceiling in classroom.
The actuating unit B32 includes stepper motor B321, gear shaft A322, gear shaft B323, bearing B324, bearing
C325, babinet 326 and axle bed 327, the projecting apparatus 31 are provided outside projector frame 311, and the babinet 326 is fixed on
On ceiling, gear shaft A322 is connected to the output terminal of stepper motor B321, gear shaft B323 and gear shaft A322 engaged transmissions,
One end of gear shaft B323 is arranged on by bearing B324 on babinet 326, and bearing (ball) cover A328, bearing are set on the outside of bearing B324
End cap A328 is fixed on babinet 326, and the other end of gear shaft B324 is arranged on by bearing C325 on bearing (ball) cover B329, axis
Socket end lid B329 is fixed on babinet 326, and the output terminal of gear shaft B323 is connected by axle bed 327 with projector frame 311.It throws
Shadow instrument frame is manufactured about 311 using hot rolled steel plate, and surrounding is welded by steel plate, and corner is welded with angle bar；Babinet 326 is used to prevent
Dirt, material use HT150；Axle bed 327 is cast using HT200, radially gets through hole, is connected by the shaft end of bolt and gear shaft B323
It connects.Bearing B324 and bearing C325 is angular contact ball bearing.
The computer 1 includes electric control gear, and electric control gear is used to receive the signal of remote controler and controls stepper motor
A221, stepper motor B321 and projecting apparatus 31.
It, can be by projection screen when needing to watch 4 writing on the blackboard of blackboard and projection screen 21 simultaneously during the specifically used present invention
21 are moved to 4 one side of blackboard, reduce the blocking to blackboard 4 of projection screen 21 so that blackboard 4 is maximized using area, convenient for same
When watch the content on teaching board content and projection screen 21；When only needing to watch the content on projection screen 21, can incite somebody to action
Projection screen 21 is moved to the position parallel with blackboard 4.
Claims (5)
1. a kind of Mobile multimedia tutoring system, it is characterised in that：It includes computer（1）, removable projection screen subsystem
System（2）With removable projector sub-system（3）, the removable projection screen subsystem（2）Including projection screen（21）, it is dynamic
Force mechanisms A（22）, guide rail A（23）With guide rail B（24）, the actuating unit A（22）, guide rail A（23）With guide rail B（24）It is solid
It is scheduled on wall, guide rail A（23）Parallel to blackboard（4）Installation, guide rail B（24）In guide rail A（23）One side, guide rail B（24）Phase
For guide rail A（23）Tilt installation, projection screen（21）Both ends be slidably arranged in guide rail A respectively（23）With guide rail B（24）On,
Projection screen（21）Also with actuating unit A（22）Connection, in actuating unit A（22）Driving under projection screen（21）In guide rail A
（23）With guide rail B（24）Upper slip, the removable projector sub-system（3）Including projecting apparatus（31）With actuating unit B
（32）, projecting apparatus（31）It is fixed on actuating unit B（32）Output terminal, actuating unit B（32）Drive projecting apparatus（31）It rotates, makes
Obtain projecting apparatus（31）With projection screen（21）Face, the computer（1）Control connection actuating unit A respectively（22）, power
Mechanism B（32）And projecting apparatus（31）；
The actuating unit A（22）Including stepper motor A（221）, bearing A（222）, synchronizing jugged belt wheel（223）, synchronous gear
Shape band（224）And pedestal（225）, the pedestal（225）It is fixed on the wall, stepper motor A（221）With bearing A（222）
It is fixed on pedestal（225）On, bearing A（222）Mounted on stepper motor A（221）Output terminal, synchronizing jugged belt wheel（223）With
Bearing A（222）Cooperation installation, synchronous cog belt（224）It is fitted to synchronizing jugged belt wheel（223）On, projection screen（21）
It is fixedly connected on synchronous cog belt（224）On, the computer（1）Control connection stepper motor A（221）.
2. a kind of Mobile multimedia tutoring system according to claim 1, it is characterised in that：The guide rail A（23）
With guide rail B（24）Upper setting idler wheel（25）, projection screen（21）Pass through Quick connection ring（26）With universal hook（27）With idler wheel（25）
Connection.
3. a kind of Mobile multimedia tutoring system according to claim 1, it is characterised in that：The actuating unit B
（32）Including stepper motor B（321）, gear shaft A（322）, gear shaft B（323）, bearing B（324）, bearing C（325）, babinet
（326）And axle bed（327）, the projecting apparatus（31）It is provided outside projector frame（311）, the babinet（326）It is fixed
On wall, gear shaft A（322）It is connected to stepper motor B（321）Output terminal, gear shaft B（323）With gear shaft A（322）
Engaged transmission, gear shaft B（323）One end pass through bearing B（324）It is arranged on babinet（326）On, bearing B（324）Outside is set
Bearing (ball) cover A（328）, bearing (ball) cover A（328）It is fixed on babinet（326）On, gear shaft B（324）The other end pass through bearing C
（325）It is arranged on bearing (ball) cover B（329）On, bearing (ball) cover B（329）It is fixed on babinet（326）On, gear shaft B（323）It is defeated
Outlet passes through axle bed（327）With projector frame（311）Connection.
4. a kind of Mobile multimedia tutoring system according to claim 1, it is characterised in that：The synchronous cog belt
（224）On be provided with synchronous cog belt set（226）, projection screen（21）Upper end is provided with hook（211）, projection screen（21）It is logical
Cross hook（211）With synchronous cog belt set（226）Connection.
5. a kind of Mobile multimedia tutoring system according to claim 1 ~ 4 any one, it is characterised in that：Described
Mobile multimedia tutoring system further includes remote controler, the computer（1）Including electric control gear, electric control gear is distant for receiving
It controls the signal of device and controls actuating unit A（22）, actuating unit B（32）And projecting apparatus（31）.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510898322.7A CN105427681B (en) | 2015-12-08 | 2015-12-08 | A kind of Mobile multimedia tutoring system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510898322.7A CN105427681B (en) | 2015-12-08 | 2015-12-08 | A kind of Mobile multimedia tutoring system |
Publications (2)
| Publication Number | Publication Date |
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| CN105427681A CN105427681A (en) | 2016-03-23 |
| CN105427681B true CN105427681B (en) | 2018-06-05 |
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| CN201510898322.7A Active CN105427681B (en) | 2015-12-08 | 2015-12-08 | A kind of Mobile multimedia tutoring system |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109901348A (en) * | 2019-04-02 | 2019-06-18 | 上海飞来飞去新媒体展示设计有限公司 | A kind of dynamic mechanically curtain projecting method based on key point calibration technique |
| CN111554132B (en) * | 2020-05-18 | 2022-10-18 | 许昌学院 | Multimedia teaching selection projection instrument |
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| CN205428255U (en) * | 2015-12-08 | 2016-08-03 | 成都大学 | Portable multimedia teaching system |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20050037707A (en) * | 2003-10-20 | 2005-04-25 | 주식회사 대우일렉트로닉스 | Automatic screen device for the projector |
| CN202275255U (en) * | 2011-10-31 | 2012-06-13 | 广州艾恩光电技术有限公司 | Deformable stereoscopic rear projection display system |
| CN103105720A (en) * | 2013-01-17 | 2013-05-15 | 潘玮玲 | Projection hanging screen system |
| CN104007600B (en) * | 2014-04-25 | 2015-12-09 | 江汉大学 | A kind of projecting apparatus system |
| CN203952963U (en) * | 2014-05-07 | 2014-11-26 | 无锡商业职业技术学院 | A kind of remote control variable bit projecting apparatus |
| CN103919377B (en) * | 2014-05-13 | 2015-12-16 | 重庆交通大学 | Rotatable reflection prevention blackboard with adjusting angle |
| CN203986789U (en) * | 2014-06-27 | 2014-12-10 | 浙江工业大学 | The whiteboard structure in Multimedia Mobile classroom |
| CN204065653U (en) * | 2014-09-28 | 2014-12-31 | 成都大学 | The moveable projection arrangement of a kind of curtain |
| CN104280993A (en) * | 2014-10-27 | 2015-01-14 | 成都艾塔科技有限公司 | Ceiling type projector cross hanging bracket |
| CN104330949B (en) * | 2014-12-03 | 2016-10-26 | 中国计量学院 | Teaching board book projector mechanism |
| CN204331267U (en) * | 2015-01-09 | 2015-05-13 | 湖北汽车工业学院 | Multifunctional projector frame |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN205428255U (en) * | 2015-12-08 | 2016-08-03 | 成都大学 | Portable multimedia teaching system |
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Effective date of registration: 20181126 Address after: 614100 No. 5, unit 6, unit B, District 38, Nanping Street, Jiajiang Town, Jiajiang, Leshan, Sichuan. Patentee after: Yang Yongli Address before: 610106 East Shiling Town, Longquanyi District, Chengdu City, Sichuan Province Patentee before: Chengdu University |
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| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20190508 Address after: 050000 Room 202, Executive Building, Geriatric University, 333 Hongqi Street, Shijiazhuang Bridge West District, Hebei Province Patentee after: Hebei Risheng Network Technology Co., Ltd. Address before: 614100 No. 5, unit 6, unit B, District 38, Nanping Street, Jiajiang Town, Jiajiang, Leshan, Sichuan. Patentee before: Yang Yongli |