CN109191936A - A kind of educational technology equipment Multi-media audio-visual education platform - Google Patents
A kind of educational technology equipment Multi-media audio-visual education platform Download PDFInfo
- Publication number
- CN109191936A CN109191936A CN201811216451.3A CN201811216451A CN109191936A CN 109191936 A CN109191936 A CN 109191936A CN 201811216451 A CN201811216451 A CN 201811216451A CN 109191936 A CN109191936 A CN 109191936A
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- China
- Prior art keywords
- fixed link
- station
- fixedly installed
- technology equipment
- media audio
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- 239000000428 dust Substances 0.000 claims abstract description 12
- 239000004744 fabric Substances 0.000 claims abstract description 12
- 238000012216 screening Methods 0.000 claims abstract description 12
- 238000012545 processing Methods 0.000 claims description 18
- 238000004140 cleaning Methods 0.000 claims description 14
- 230000005540 biological transmission Effects 0.000 claims description 5
- 238000010586 diagram Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 230000006399 behavior Effects 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
Classifications
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B1/00—Cleaning by methods involving the use of tools
- B08B1/10—Cleaning by methods involving the use of tools characterised by the type of cleaning tool
- B08B1/12—Brushes
-
- 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
- G03B21/54—Accessories
-
- 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
- G03B21/54—Accessories
- G03B21/56—Projection screens
- G03B21/58—Projection screens collapsible, e.g. foldable; of variable area
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Business, Economics & Management (AREA)
- Educational Administration (AREA)
- Educational Technology (AREA)
- Theoretical Computer Science (AREA)
- Electrically Operated Instructional Devices (AREA)
Abstract
The invention discloses a kind of educational technology equipment Multi-media audio-visual education platform, including device noumenon, the internal symmetry on rear side of described device ontology is rotatably equipped with two first screw rods, and the lower end of two first screw rods is sequentially connected by the first belt；Sliding support is threaded on the upside of first screw rod, the upper end of two sliding supports is fixedly installed with projector mounting rack；Station is tiltedly installed on front side of described device ontology；U-type groove is offered on the station, the left and right sides of U-type groove is symmetrically rotatably equipped with two second screw rods, and the second swivel nut is threaded on the second screw rod, is fixedly connected between two the second swivel nuts by the second fixed link；The downside of the U-type groove is also fixedly installed with the first fixed link, and the first fixed link is fixedly connected by screening dust cloth with the second fixed link.The present invention can change the height of projector, can also cover the operation button on station, prevent station from falling ash.
Description
Technical field
The present invention relates to a kind of electrical classroom platform, specifically a kind of educational technology equipment Multi-media audio-visual education platform.
Background technique
The development of China's Modern Education Technology originates in the twenties in last century, referred to as audio-visual education programme.Audio-visual education programme at that time
The media such as magic lantern, film used in activity are used to impart knowledge to students than original knowledge from hearsay and later print media, propagation side
Formula has been leaped major step, has belonged to the scope of Modern Education Technology, but this is not also the Modern Education Technology in complete meaning, only
The primary stage of Modern Education Technology development.
Audio-visual education programme is modern education with modern education such as computer, projector, magic lantern, recording, video recording, broadcast, film, TVs
Technical education by design to teaching process and resource, exploitation, application, is managed and is commented with Modern Educational Theory and technology
Valence, to realize the theory and practice of teaching modernization.
Existing mobile electrified education platform, has a single function, and cannot achieve moving up and down for projector, make the use of projector by
To limitation, at the same time, the station on existing electrical classroom platform easily falls ash and is difficult to clear up, so as to cause operation button into
Grey failure influences the normal use of electrical classroom platform.
Summary of the invention
The purpose of the present invention is to provide a kind of educational technology equipment Multi-media audio-visual education platforms, to solve in above-mentioned background technique
The problem of proposition.
To achieve the above object, the invention provides the following technical scheme:
A kind of educational technology equipment Multi-media audio-visual education platform, including device noumenon, the internal symmetry on rear side of described device ontology
Two first screw rods are rotatably equipped with, the lower end of two first screw rods is sequentially connected by the first belt；First screw rod
Upside is threaded with sliding support, and two sliding supports are connect with the internal slide of device noumenon, and two sliding supports
Upper end be fixedly installed with projector mounting rack；Station is tiltedly installed on front side of described device ontology；On the station
U-type groove is offered, the left and right sides of U-type groove is symmetrically rotatably equipped with two second screw rods, and the upper end of two second screw rods passes through
The transmission connection of second belt；It is threaded with the second swivel nut on second screw rod, consolidates between two the second swivel nuts by second
Fixed pole is fixedly connected；The downside of the U-type groove is also fixedly installed with the first fixed link, and the first fixed link passes through screening dust cloth and second
Fixed link is fixedly connected.
As a further solution of the present invention: the inside of described device ontology is also fixedly installed with first motor, the first electricity
Machine is fixedly connected with wherein first screw rod.
As further scheme of the invention: being evenly arranged with several this body running of control device on the station
Operation button.
As further scheme of the invention: the inside of the station is also fixedly installed with drive wherein one second
Second motor of screw rod rotation.
As further scheme of the invention: being rotatably equipped with rotary shaft, rotary shaft on the downside of second fixed link
On be fixedly installed with several cleaning brushes, the downside of the second fixed link is also fixedly installed with the third motor for driving rotary shaft rotation.
As the present invention further scheme: the bottom of described device ontology is also provided with locker, before locker
Side is provided with cabinet door, and electronic lock is provided in cabinet door, and warning device is additionally provided in device noumenon, and warning device includes centre
Manage unit and alarm unit.
As further scheme of the invention: being fixedly installed with card reader and lid door detector, institute on the electronic lock
The input terminal and card reader and lid door detector for stating central processing unit are electrically connected, the output end of central processing unit and alarm
Unit is electrically connected, and alarm unit includes emergency alarm bell and alarm lamp.
As further scheme of the invention: the central processing unit is also electrically connected with memory.
Compared with prior art, the beneficial effects of the present invention are:
1, the present invention drives sliding support and projector mounting rack to move up and down by the rotation of two first screw rods, thus
Change the height of projector；
2, the second fixed link slide downward is driven when the present invention is rotated clockwise simultaneously by two second screw rods, second is solid
Screening dust cloth expansion is driven when fixed pole slide downward, to cover the operation button on station, prevents station from falling ash；
3, it is also rotatably equipped with rotary shaft on the downside of the second fixed link, several cleaning brushes are fixedly installed in rotary shaft,
Rotary shaft rotation is driven by third motor, to carry out clearly by cleaning brush to station in the second fixed link slide downward
It sweeps, keeps the cleaning of station, improve the service life of station；
4, it is additionally provided with warning device, when user opens cabinet door using correct magnetic card, card reader receives magnetic card
On signal, the signal that lid door detector detects is converted into unlatching from closing, and when someone opens cabinet door by force, card reader is simultaneously
The signal on magnetic card is not received, and the signal that lid door detector detects is converted into unlatching from closing, and open signal is transmitted
To central processing unit, central processing unit drives alarm unit work.
Detailed description of the invention
Fig. 1 is the main view of educational technology equipment Multi-media audio-visual education platform.
Fig. 2 is educational technology equipment Multi-media audio-visual education platform schematic diagram of internal structure.
Fig. 3 is the structural schematic diagram of educational technology equipment Multi-media audio-visual education platform station.
Fig. 4 is the structural schematic diagram of the second fixed link in educational technology equipment Multi-media audio-visual education platform.
Fig. 5 is the structural block diagram of warning device in educational technology equipment Multi-media audio-visual education platform.
In figure: 1- device noumenon, 2- warning device, 3- sliding support, 4- projector mounting rack, 5- station, 6- cabinet door,
7- electronic lock, the first screw rod of 8-, the first belt of 9-, 10- first motor, 11-U type groove, the second screw rod of 12-, 13- swivel nut, 14-
Two motors, the second belt of 15-, the first fixed link of 16-, 17- screening dust cloth, the second fixed link of 18-, 19- operation button, 20- are cleaned
Brush, 21- third motor, 22- card reader, 23- memory, 24- lid door detector, 25- central processing unit, 26- alarm unit.
Specific embodiment
The technical solution of the patent is explained in further detail With reference to embodiment.
Embodiment 1
Incorporated by reference to Fig. 1-3, a kind of educational technology equipment Multi-media audio-visual education platform, including device noumenon 1, described device ontology 1
The internal symmetry of rear side is rotatably equipped with two first screw rods 8, and the lower end of two first screw rods 8 is connected by the transmission of the first belt 9
It connects, the inside of device noumenon 1 is also fixedly installed with first motor 10, first motor 10 and the wherein fixed company of first screw rod 8
It connects, so that two first screw rods 8 be driven to rotate in same direction simultaneously；The upside of first screw rod 8 is threaded with sliding support 3,
Two sliding supports 3 are connect with the internal slide of device noumenon 1, and the upper end of two sliding supports 3 is fixedly installed with projection
Instrument mounting rack 4 so that projector is fixedly mounted, and drives sliding support 3 and projector peace by the rotation of two first screw rods 8
It shelves 4 to move up and down, to change the height of projector；
The front side of described device ontology 1 is tiltedly installed with station 5, and several control devices are evenly arranged on station 5
The operation button 19 that ontology 1 works；Outside on the station 5 positioned at operation button 19 offers U-type groove 11, U-type groove 11
The left and right sides be symmetrically rotatably equipped with two second screw rods 12, the upper end of two second screw rods 12 passes through the second belt 15 and is driven
Connection, so that two second screw rods 12 rotate in same direction simultaneously；The inside of the station 5 is also fixedly installed with drive wherein one
Second motor 14 of the second screw rod 12 rotation；The second swivel nut 13, two the second swivel nuts are threaded on second screw rod 12
It is fixedly connected between 13 by the second fixed link 18, two second screw rods 12 drive the second fixed link 18 when rotating clockwise simultaneously
Slide downward, two second screw rods 12 drive 18 upward sliding of the second fixed link when rotating counterclockwise simultaneously；The U-type groove 11
Downside is also fixedly installed with the first fixed link 16, and the first fixed link 16 is fixedly connected by screening dust cloth 17 with the second fixed link 18,
It drives screening dust cloth 17 to be unfolded when the second 18 slide downward of fixed link, to cover the operation button 19 on station 5, prevents from operating
Platform 5 falls ash.
Embodiment 2
Incorporated by reference to Fig. 1-4, a kind of educational technology equipment Multi-media audio-visual education platform, including device noumenon 1, described device ontology 1
The internal symmetry of rear side is rotatably equipped with two first screw rods 8, and the lower end of two first screw rods 8 is connected by the transmission of the first belt 9
It connects, the inside of device noumenon 1 is also fixedly installed with first motor 10, first motor 10 and the wherein fixed company of first screw rod 8
It connects, so that two first screw rods 8 be driven to rotate in same direction simultaneously；The upside of first screw rod 8 is threaded with sliding support 3,
Two sliding supports 3 are connect with the internal slide of device noumenon 1, and the upper end of two sliding supports 3 is fixedly installed with projection
Instrument mounting rack 4 so that projector is fixedly mounted, and drives sliding support 3 and projector peace by the rotation of two first screw rods 8
It shelves 4 to move up and down, to change the height of projector；
The front side of described device ontology 1 is tiltedly installed with station 5, and several control devices are evenly arranged on station 5
The operation button 19 that ontology 1 works；Outside on the station 5 positioned at operation button 19 offers U-type groove 11, U-type groove 11
The left and right sides be symmetrically rotatably equipped with two second screw rods 12, the upper end of two second screw rods 12 passes through the second belt 15 and is driven
Connection, so that two second screw rods 12 rotate in same direction simultaneously；The inside of the station 5 is also fixedly installed with drive wherein one
Second motor 14 of the second screw rod 12 rotation；The second swivel nut 13, two the second swivel nuts are threaded on second screw rod 12
It is fixedly connected between 13 by the second fixed link 18, two second screw rods 12 drive the second fixed link 18 when rotating clockwise simultaneously
Slide downward, two second screw rods 12 drive 18 upward sliding of the second fixed link when rotating counterclockwise simultaneously；The U-type groove 11
Downside is also fixedly installed with the first fixed link 16, and the first fixed link 16 is fixedly connected by screening dust cloth 17 with the second fixed link 18,
It drives screening dust cloth 17 to be unfolded when the second 18 slide downward of fixed link, to cover the operation button 19 on station 5, prevents from operating
Platform 5 falls ash.
The present embodiment difference from example 1 is that, the downside of second fixed link 18 is rotatably equipped with rotation
Axis is fixedly installed with several cleaning brushes 20 in rotary shaft, and the downside of the second fixed link 18, which is also fixedly installed with, drives rotary shaft to turn
Dynamic third motor 21 drives rotary shaft rotation by third motor 21, to pass through in the second 18 slide downward of fixed link
Cleaning brush 20 cleans station 5, keeps the cleaning of station 5, improves the service life of station 5.
Embodiment 3
Incorporated by reference to Fig. 1-5, a kind of educational technology equipment Multi-media audio-visual education platform, including device noumenon 1, described device ontology 1
The internal symmetry of rear side is rotatably equipped with two first screw rods 8, and the lower end of two first screw rods 8 is connected by the transmission of the first belt 9
It connects, the inside of device noumenon 1 is also fixedly installed with first motor 10, first motor 10 and the wherein fixed company of first screw rod 8
It connects, so that two first screw rods 8 be driven to rotate in same direction simultaneously；The upside of first screw rod 8 is threaded with sliding support 3,
Two sliding supports 3 are connect with the internal slide of device noumenon 1, and the upper end of two sliding supports 3 is fixedly installed with projection
Instrument mounting rack 4 so that projector is fixedly mounted, and drives sliding support 3 and projector peace by the rotation of two first screw rods 8
It shelves 4 to move up and down, to change the height of projector；
The front side of described device ontology 1 is tiltedly installed with station 5, and several control devices are evenly arranged on station 5
The operation button 19 that ontology 1 works；Outside on the station 5 positioned at operation button 19 offers U-type groove 11, U-type groove 11
The left and right sides be symmetrically rotatably equipped with two second screw rods 12, the upper end of two second screw rods 12 passes through the second belt 15 and is driven
Connection, so that two second screw rods 12 rotate in same direction simultaneously；The inside of the station 5 is also fixedly installed with drive wherein one
Second motor 14 of the second screw rod 12 rotation；The second swivel nut 13, two the second swivel nuts are threaded on second screw rod 12
It is fixedly connected between 13 by the second fixed link 18, two second screw rods 12 drive the second fixed link 18 when rotating clockwise simultaneously
Slide downward, two second screw rods 12 drive 18 upward sliding of the second fixed link when rotating counterclockwise simultaneously；The U-type groove 11
Downside is also fixedly installed with the first fixed link 16, and the first fixed link 16 is fixedly connected by screening dust cloth 17 with the second fixed link 18,
It drives screening dust cloth 17 to be unfolded when the second 18 slide downward of fixed link, to cover the operation button 19 on station 5, prevents from operating
Platform 5 falls ash.
The downside of second fixed link 18 is rotatably equipped with rotary shaft, and several cleaning brushes are fixedly installed in rotary shaft
20, the downside of the second fixed link 18 is also fixedly installed with the third motor 21 for driving rotary shaft rotation, passes through 21 band of third motor
Dynamic rotary shaft rotation keeps behaviour to clean by cleaning brush 20 to station 5 in the second 18 slide downward of fixed link
Make the cleaning of platform 5, improves the service life of station 5.
The bottom of described device ontology 1 is also provided with locker, and cabinet door 6 is provided on front side of locker, is arranged in cabinet door 6
There is electronic lock 7, warning device 2 is additionally provided in device noumenon 1, warning device 2 includes central processing unit 25 and alarm unit
26, card reader 22 and lid door detector 24 are fixedly installed on the electronic lock 7, card reader 22 is used to examine the enabling of user
Magnetic card, lid door detector 24 are used to detect the open and-shut mode of cabinet door 6, the input terminal and card reader 22 of the central processing unit 25
It is electrically connected with lid door detector 24, the output end and alarm unit 26 of central processing unit 25 are electrically connected, alarm unit 26
Including emergency alarm bell and alarm lamp, when user opens cabinet door 6 using correct magnetic card, card reader 22 receives the letter on magnetic card
Number, the signal that lid door detector 24 detects is converted into unlatching from closing, and when someone opens cabinet door 6 by force, card reader 22 is simultaneously
The signal on magnetic card is not received, and the signal that lid door detector 24 detects is converted into unlatching from closing, and open signal is passed
Central processing unit 25 is passed, central processing unit 25 drives alarm unit 26 to work；The central processing unit 25 is also electrically
It is connected with memory 23, memory 23 is for storing the time opened the door every time.
The present invention drives sliding support and projector mounting rack to move up and down by the rotation of two first screw rods, to change
Become the height of projector；The present invention drives the second fixed link slide downward when rotating clockwise simultaneously by two second screw rods,
Screening dust cloth expansion is driven when the second fixed link slide downward, to cover the operation button on station, prevents station from falling ash；
It is also rotatably equipped with rotary shaft on the downside of the second fixed link, several cleaning brushes are fixedly installed in rotary shaft, passes through third electricity
Machine drives rotary shaft rotation, to clean by cleaning brush to station in the second fixed link slide downward, keeps behaviour
The cleaning for making platform improves the service life of station；It is additionally provided with warning device, when user opens cabinet using correct magnetic card
Men Shi, card reader receive the signal on magnetic card, and the signal that lid door detector detects is converted into unlatching from closing, when someone is strong
When row opens cabinet door, card reader does not receive the signal on magnetic card, and the signal that lid door detector detects is converted into from closing
It opens, and open signal is passed into central processing unit, central processing unit drives alarm unit work.
The preferred embodiment of the patent is described in detail above, but this patent is not limited to above-mentioned embodiment party
Formula within the knowledge of one of ordinary skill in the art can also be under the premise of not departing from this patent objective
It makes a variety of changes.
Claims (8)
1. a kind of educational technology equipment Multi-media audio-visual education platform, which is characterized in that including device noumenon (1), described device ontology (1)
The internal symmetry of rear side is rotatably equipped with two first screw rods (8), and the lower end of two first screw rods (8) passes through the first belt (9)
Transmission connection；Be threaded with sliding support (3) on the upside of first screw rod (8), two sliding supports (3) with device sheet
The internal slide of body (1) connects, and the upper end of two sliding supports (3) is fixedly installed with projector mounting rack (4)；Described device
Station (5) are tiltedly installed on front side of ontology (1)；It is offered U-type groove (11) on the station (5), a left side for U-type groove (11)
Right two sides are symmetrically rotatably equipped with two second screw rods (12), and the upper end of two second screw rods (12) is passed by the second belt (15)
Dynamic connection；It is threaded with the second swivel nut (13) on second screw rod (12), passes through second between two the second swivel nuts (13)
Fixed link (18) is fixedly connected；The downside of the U-type groove (11) is also fixedly installed with the first fixed link (16), the first fixed link
(16) it is fixedly connected by screening dust cloth (17) with the second fixed link (18).
2. educational technology equipment Multi-media audio-visual education platform according to claim 1, which is characterized in that described device ontology (1)
Inside be also fixedly installed with first motor (10), first motor (10) is fixedly connected with wherein first screw rod (8).
3. educational technology equipment Multi-media audio-visual education platform according to claim 2, which is characterized in that on the station (5)
It is evenly arranged with the operation button (19) of several control device ontology (1) work.
4. educational technology equipment Multi-media audio-visual education platform according to claim 3, which is characterized in that the station (5)
Inside is also fixedly installed with the second motor (14) for driving wherein second screw rod (12) rotation.
5. educational technology equipment Multi-media audio-visual education platform according to claim 1, which is characterized in that second fixed link
(18) it is rotatably equipped with rotary shaft on the downside of, is fixedly installed in rotary shaft several cleaning brushes (20), the second fixed link (18)
Downside is also fixedly installed with the third motor (21) for driving rotary shaft rotation.
6. educational technology equipment Multi-media audio-visual education platform according to claim 1, which is characterized in that described device ontology (1)
Bottom be also provided with locker, be provided on front side of locker cabinet door (6), electronic lock (7), device be provided in cabinet door (6)
It is additionally provided on ontology (1) warning device (2), warning device (2) includes central processing unit (25) and alarm unit (26).
7. educational technology equipment Multi-media audio-visual education platform according to claim 6, which is characterized in that on the electronic lock (7)
It is fixedly installed with card reader (22) and lid door detector (24), input terminal and card reader (22) of the central processing unit (25)
It is electrically connected with lid door detector (24), the output end of central processing unit (25) and alarm unit (26) are electrically connected, alarm
Unit (26) includes emergency alarm bell and alarm lamp.
8. educational technology equipment Multi-media audio-visual education platform according to claim 7, which is characterized in that the central processing unit
(25) memory (23) are also electrically connected with.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811216451.3A CN109191936A (en) | 2018-10-18 | 2018-10-18 | A kind of educational technology equipment Multi-media audio-visual education platform |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811216451.3A CN109191936A (en) | 2018-10-18 | 2018-10-18 | A kind of educational technology equipment Multi-media audio-visual education platform |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109191936A true CN109191936A (en) | 2019-01-11 |
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ID=64946044
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811216451.3A Pending CN109191936A (en) | 2018-10-18 | 2018-10-18 | A kind of educational technology equipment Multi-media audio-visual education platform |
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| CN (1) | CN109191936A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110176157A (en) * | 2019-04-24 | 2019-08-27 | 安徽工程大学 | A kind of educational technology equipment Multi-media audio-visual education platform |
-
2018
- 2018-10-18 CN CN201811216451.3A patent/CN109191936A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110176157A (en) * | 2019-04-24 | 2019-08-27 | 安徽工程大学 | A kind of educational technology equipment Multi-media audio-visual education platform |
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| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20190111 |
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| WD01 | Invention patent application deemed withdrawn after publication |