CN112927567A - Projection display device of teaching usefulness - Google Patents
Projection display device of teaching usefulness Download PDFInfo
- Publication number
- CN112927567A CN112927567A CN202011606735.0A CN202011606735A CN112927567A CN 112927567 A CN112927567 A CN 112927567A CN 202011606735 A CN202011606735 A CN 202011606735A CN 112927567 A CN112927567 A CN 112927567A
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- box
- mounting
- fixing
- grooves
- plate
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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
- G03B21/54—Accessories
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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)
Abstract
The invention belongs to the technical field of projection display, in particular to a projection display device for teaching, which aims at the problem of inconvenient disassembly of the existing projector and provides a scheme that the projection display device comprises a mounting frame, wherein a mounting box is fixedly arranged on one side of the mounting frame, a first shaft lever and a second shaft lever are respectively and rotatably connected with the inner walls of the two sides of the mounting frame, the two ends of the first shaft lever and the second shaft lever penetrate through the inner wall of one side of the mounting frame and extend into the mounting box, and a partition plate is fixedly arranged on the inner wall of the mounting frame. For maintenance or cleaning.
Description
Technical Field
The invention relates to the technical field of projection display, in particular to a projection display device for teaching.
Background
A projector, also called a projector, is a device that can project images or videos onto a curtain, and can be connected with a computer, a VCD, a DVD, a BD, a game machine, a DV, etc. through different interfaces to play corresponding video signals. Projectors are widely used in homes, offices, schools and entertainment places, and have different types such as CRT, LCD and DLP according to different working modes.
The existing teaching projector is mostly installed on the ceiling of a classroom and cannot be moved, and when the projector is maintained or cleaned, workers are required to detach the projector from the ceiling by using a ladder, so that the teaching projector is very inconvenient.
Disclosure of Invention
The invention aims to solve the defects in the prior art and provides a projection display device for teaching.
In order to achieve the purpose, the invention adopts the following technical scheme:
a projection display device for teaching comprises a mounting frame, wherein a mounting box is fixedly mounted on one side of the mounting frame, a first shaft rod and a second shaft rod are respectively and rotatably connected to the inner walls of the two sides of the mounting frame, the two ends of the first shaft rod and the second shaft rod penetrate through the inner wall of one side of the mounting frame and extend into the mounting box, a partition plate is fixedly mounted on the inner wall of the mounting frame and is positioned below the first shaft rod and the second shaft rod, a bottom plate is attached to the bottom of the mounting frame, a protective box is rotatably connected to the top of the bottom plate and is positioned in the mounting frame, an inclined plane plate is fixedly mounted at the top of the bottom plate and is positioned in the protective box, a baffle is fixedly mounted at the top of the bottom plate and is positioned at the box opening of the protective box and is attached to the inner walls of the two sides of the box opening of the protective box, a projector is arranged at the top of the inclined plane, and a, the top of inclined plane board is provided with four draw-in grooves, and in four landing leg card income draw-in grooves of projecting apparatus, one side of mounting bracket is provided with the projection groove, and the camera lens of projecting apparatus is located the projection groove, the outer wall of first axostylus axostyle and second axostylus axostyle is provided with in carrying out the lifting unit who goes up and down to the projecting apparatus, set up in the install bin and be used for providing the power component of power for lifting unit, the both ends of baffle are provided with and are used for carrying out the fixed subassembly fixed to.
Preferably, lifting unit establishes four drum on first axostylus axostyle and second axostylus axostyle outer wall including the fixed cover of symmetry, the top fixed mounting of baffle has four fixed blocks, and the fixed block is corresponding with the drum, the top symmetry of baffle is provided with four wire casings, and four wire casings are corresponding with four fixed blocks, four it has the connecting wire all to twine on the drum, the one end of connecting wire run through fixed block and wire casing and with the top fixed connection of bottom plate, four all rotate on the fixed block and be connected with the wire wheel, and the wire wheel is laminated with the connecting wire mutually.
Preferably, the power assembly comprises a motor fixedly installed at the bottom of the installation box, one side of the motor is attached to the inner wall of one side of the installation box, an output shaft of the motor is fixedly connected with one end of the first shaft rod, a first gear is fixedly sleeved on the outer wall of the first shaft rod and is located in the installation box, a second gear is fixedly sleeved at one end of the second shaft rod and is meshed with the first gear.
Preferably, fixed subassembly is including setting up the fixed slot at the baffle both ends, the case mouth both sides inner wall of protective housing all is provided with the recess, and the recess is corresponding with the fixed slot, the inner wall of recess is provided with the dead lever, and the one end of dead lever extends to in having the fixed slot, the outer wall fixed cover of dead lever is equipped with the limiting plate, and the limiting plate be located the recess and with the inner wall sliding connection of recess, the outer wall cover of dead lever is equipped with the spring, and the both ends of spring laminate with one side of limiting plate and one side inner wall of recess respectively mutually, one end of dead lever runs through one side inner wall of recess and extends to the outside of protective housing, the one end fixed mounting of dead lever has the plectane, and the.
Preferably, two bearings are symmetrically and fixedly mounted on the inner walls of the two sides of the mounting frame, and the two ends of the first shaft lever and the second shaft lever penetrate through the inner rings of the corresponding bearings and are welded with the inner walls of the bearings, so that the rotation friction can be reduced.
Preferably, the top inner wall fixed mounting of guard box has the clamp plate, and the bottom of clamp plate and the top of projecting apparatus are laminated mutually, can fix the projecting apparatus.
Preferably, the top of the two sides of the mounting rack is fixedly provided with a plurality of mounting plates which are provided with mounting holes, so that the mounting rack can be conveniently mounted.
Preferably, the top of the bottom plate is symmetrically and fixedly provided with two stabilizing plates, and one sides of the two stabilizing plates are attached to the inner walls of the two sides of the mounting frame, so that the bottom plate can be stabilized.
When the projector is used, the starting motor drives the first shaft rod to rotate, the first shaft rod drives the two wire coils and the second gear to rotate, the second gear drives the other two wire coils to rotate, one end of the connecting wire can be moved downwards by the wire coils, the bottom plate can also move downwards at the moment, the bottom plate can drive the protective box and the inclined plate to move downwards, the protective box and the inclined plate can drive the projector to move downwards, when the protective box and the inclined plate move to a proper position, the fixed rod is pulled to be separated from the fixed groove, the protective box is released from being fixed, the spring is compressed, the protective box can be taken out for maintenance or cleaning by rotating the protective box, the support legs of the projector are clamped into the clamping grooves after the protective box is rotated, the fixed rod is pulled and pressed downwards, the fixed rod is released, the spring pushes the fixed rod to be clamped into the fixed groove, and the protective box is fixed, the reversal motor drives the bottom plate rebound through line dish and connecting wire, and the bottom plate drives the protective housing and stabilizes the board rebound, and the firm board can carry out the block with the inner wall of mounting bracket to stabilize the bottom plate.
The projector cleaning device is simple in structure, the motor is started to enable the bottom plate to move downwards, the fixing rod is pulled, the protection box is rotated, the projector can be taken out for maintenance or cleaning, the projector is placed into the protection box after the projector is placed, the fixing rod is pulled and pressed downwards, the fixing rod is loosened for fixing, the bottom plate is driven by the reversing motor to reset, and the projector is conveniently detached from a ceiling so as to be maintained or cleaned.
Drawings
Fig. 1 is a schematic overall structure diagram of a projection display device for teaching according to the present invention;
FIG. 2 is a schematic top view and side view of a projection display device for teaching according to the present invention;
FIG. 3 is a schematic side view of a projection display device for teaching according to the present invention;
FIG. 4 is a schematic cross-sectional side view of a projection display device for teaching according to the present invention;
FIG. 5 is a schematic side view of a protective box of the projection display device for teaching according to the present invention;
FIG. 6 is an enlarged schematic view of a portion A of the projection display device for teaching according to the present invention;
fig. 7 is a schematic cross-sectional structural view of a protective box of a projection display device for teaching according to the present invention.
In the figure: 1. a mounting frame; 2. installing a box; 3. a partition plate; 4. a base plate; 5. a protective box; 6. Wire coils; 7. a first shaft lever; 8. a motor; 9. a first gear; 10. a projection slot; 11. a wire guide wheel; 12. a connecting wire; 13. a projector; 14. a second shaft lever; 15. a bearing; 16. a second gear; 17. a wire slot; 18. pressing a plate; 19. a fixed block; 20. a circular plate; 21. an inclined plane plate; 22. a card slot; 23. fixing grooves; 24. a baffle plate; 25. fixing the rod; 26. a limiting plate; 27. A spring; 28. a groove; 29. mounting holes; 30. mounting a plate; 31. and (5) stabilizing the plate.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.
Example one
Referring to fig. 1-7, a projection display device for teaching, comprising a mounting frame 1, a mounting box 2 is fixedly mounted on one side of the mounting frame 1, the inner walls of the two sides of the mounting frame 1 are respectively and rotatably connected with a first shaft rod 7 and a second shaft rod 14, the two ends of the first shaft rod 7 and the second shaft rod 14 penetrate through the inner wall of one side of the mounting frame 1 and extend into the mounting box 2, a partition plate 3 is fixedly mounted on the inner wall of the mounting frame 1, the partition plate 3 is positioned below the first shaft rod 7 and the second shaft rod 14, a bottom plate 4 is attached to the bottom of the mounting frame 1, a protection box 5 is rotatably connected to the top of the bottom plate 4, the protection box 5 is positioned in the mounting frame 1, an inclined plane 21 is fixedly mounted at the top of the bottom plate 4, the inclined plane 21 is positioned in the protection box 5, a baffle 24 is fixedly mounted at the top of the bottom plate 4, and the baffle 24 is, the top of inclined plane board 21 sets up projecting apparatus 13, and the camera lens of projecting apparatus 13 runs through the case mouth of protective housing 5 and extends to the outer wall of protective housing 5, the top of inclined plane board 21 is provided with four draw-in grooves 22, and four landing leg card of projecting apparatus 13 are gone into in draw-in groove 22, one side of mounting bracket 1 is provided with projection groove 10, and the camera lens of projecting apparatus 13 is located projection groove 10, the outer wall of first axostylus axostyle 7 and second axostylus axostyle 14 is provided with in the lifting unit who goes up and down to projecting apparatus 13, set up in the install bin 2 and be used for providing the power component of power for lifting unit, the both ends of baffle 24 are provided with and are.
Example two
The improvement is further based on the first embodiment: the lifting assembly comprises four wire coils 6 which are symmetrically and fixedly sleeved on the outer walls of a first shaft rod 7 and a second shaft rod 14, four fixing blocks 19 are fixedly installed at the top of a partition plate 3, the fixing blocks 19 correspond to the wire coils 6, four wire grooves 17 are symmetrically arranged at the top of the partition plate 3, the four wire grooves 17 correspond to the four fixing blocks 19, connecting wires 12 are wound on the four wire coils 6, one ends of the connecting wires 12 penetrate through the fixing blocks 19 and the wire grooves 17 and are fixedly connected with the top of a bottom plate 4, wire guide wheels 11 are rotatably connected on the four fixing blocks 19, the wire guide wheels 11 are attached to the connecting wires 12, the power assembly comprises a motor 8 fixedly installed at the bottom of an installation box 2, one side of the motor 8 is attached to the inner wall of one side of the installation box 2, the output shaft of the motor 8 is fixedly connected with one end of the first shaft rod, the first gear 9 is positioned in the installation box 2, one end of the second shaft lever 14 is fixedly sleeved with a second gear 16, the second gear 16 is meshed with the first gear 9, the fixing component comprises fixing grooves 23 arranged at two ends of a baffle plate 24, grooves 28 are arranged on inner walls of two sides of a box opening of the protection box 5, the grooves 28 correspond to the fixing grooves 23, fixing rods 25 are arranged on inner walls of the grooves 28, one ends of the fixing rods 25 extend into the fixing grooves 23, a limiting plate 26 is fixedly sleeved on an outer wall of each fixing rod 25, the limiting plate 26 is positioned in each groove 28 and is in sliding connection with the inner wall of the corresponding groove 28, springs 27 are sleeved on outer walls of the fixing rods 25, two ends of each spring 27 are respectively attached to one side of the corresponding limiting plate 26 and one side of the corresponding inner wall of the corresponding groove 28, one end of each fixing rod 25 penetrates through the inner wall of one side of the corresponding groove 28, and the plectane 20 is located one side of guard box 5, the both sides inner wall symmetry fixed mounting of mounting bracket 1 has two bearings 15, and the both ends of primary shaft pole 7 and second shaft pole 14 run through the inner circle of corresponding bearing 15 and weld with the inner wall of bearing 15 mutually, can reduce the running friction, the top inner wall fixed mounting of guard box 5 has clamp plate 18, and the bottom of clamp plate 18 is laminated with the top of projecting apparatus 13 mutually, can fix projecting apparatus 13, the both sides top fixed mounting of mounting bracket 1 has a plurality of mounting panels 30, all be provided with mounting hole 29 on a plurality of mounting panels 30, can conveniently install mounting bracket 1, the top symmetry fixed mounting of bottom plate 4 has two steadying plates 31, and one side of two steadying plates 31 is laminated with the both sides inner wall of mounting bracket 1 mutually, can be to the firm of bottom plate 4.
The working principle is as follows: when the device is used, the motor 8 is started, the motor 8 drives the first shaft lever 7 to rotate, the first shaft lever 7 drives the first gear 9 and the wire coil 6 to rotate, the first gear 9 drives the second gear 16 to rotate, the second gear 16 drives the second shaft lever 14 to rotate, the second gear 16 drives the wire coil 6 to rotate, when the wire coil 6 rotates, one end of the connecting wire 12 wound on the outer side can move downwards, the connecting wire 12 can drive the wire guide wheel 11 to rotate, the bottom plate 4 can also move downwards at the moment, the bottom plate 4 can drive the protection box 5, the stabilizing plate 31, the inclined plate 21 and the baffle plate 24 to move downwards, the protection box 5 can drive the pressing plate 18 to extend downwards, the pressing plate 18 and the inclined plate 21 can drive the projector 13 to move downwards, when the projector moves to a proper position, the circular plate 20 is pulled, the circular plate 20 drives the fixing rod 25 to move, and the fixing rod 25 can be separated from the fixing groove, and the fixing of the protection box 5 is released, the fixing rod 25 can drive the limiting plate 26 to move, the limiting plate 26 can compress the spring 27, the fixing rod 25 is moved upwards, the fixing rod 25 can drive the protection box 5 to rotate, at the moment, the projector 13 can be taken out for maintenance or cleaning, after the maintenance or cleaning, the supporting leg of the projector 13 is clamped into the clamping groove 22, the protection box 5 is rotated to cover the projector 13, the fixing rod 25 is pulled and pressed downwards to enable the fixing rod 25 to correspond to the fixing groove 23, the fixing rod 25 is loosened, the spring 27 rebounds, the spring 27 pushes the limiting plate 26 to move, the limiting plate 26 drives the fixing rod 25 to move, the fixing rod 25 can be clamped into the fixing groove 23 and fixes the protection box 5, the motor 8 is reversed, the bottom plate 4 can be driven to move upwards through the line disc 6 and the connecting line 12, the bottom plate 4 drives the protection box, The inclined plane plate 21 and the baffle plate 24 move upwards, and when the bottom plate 4 is attached to the mounting rack 1, the stabilizing plate 31 is engaged with the inner wall of the mounting rack 1, and stabilizes the bottom plate 4.
However, as is well known to those skilled in the art, the working principle and wiring method of the motor 8 and the projector 13 are common and are conventional means or common knowledge, and thus will not be described herein, and those skilled in the art can make any choice according to their needs or convenience.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (8)
1. The projection display device for teaching comprises a mounting rack (1) and is characterized in that a mounting box (2) is fixedly mounted on one side of the mounting rack (1), inner walls on two sides of the mounting rack (1) are respectively and rotatably connected with a first shaft rod (7) and a second shaft rod (14), two ends of the first shaft rod (7) and the second shaft rod (14) penetrate through the inner wall of one side of the mounting rack (1) and extend into the mounting box (2), a partition plate (3) is fixedly mounted on the inner wall of the mounting rack (1), the partition plate (3) is located below the first shaft rod (7) and the second shaft rod (14), a bottom plate (4) is attached to the bottom of the mounting rack (1), a protection box (5) is rotatably connected to the top of the bottom plate (4), the protection box (5) is located in the mounting rack (1), and an inclined plane plate (21) is fixedly mounted at the top of the bottom plate (4, the inclined plane plate (21) is located in the protective box (5), the baffle (24) is fixedly mounted at the top of the bottom plate (4), the baffle (24) is located at the box opening of the protective box (5) and is attached to the inner walls of the two sides of the box opening of the protective box (5), the projector (13) is arranged at the top of the inclined plane plate (21), the lens of the projector (13) penetrates through the box opening of the protective box (5) and extends to the outer wall of the protective box (5), four clamping grooves (22) are formed in the top of the inclined plane plate (21), four supporting legs of the projector (13) are clamped into the clamping grooves (22), a projection groove (10) is formed in one side of the mounting frame (1), the lens of the projector (13) is located in the projection groove (10), lifting components for lifting the projector (13) are arranged on the outer walls of the first shaft lever (7) and the second shaft lever (14), and a power component for providing power for the lifting components is arranged in the mounting frame (2), and fixing components for fixing the protective box (5) are arranged at two ends of the baffle (24).
2. A teaching projection display device according to claim 1, the lifting component comprises four wire coils (6) which are symmetrically and fixedly sleeved on the outer walls of the first shaft lever (7) and the second shaft lever (14), four fixing blocks (19) are fixedly arranged at the top of the partition plate (3), the fixed block (19) corresponds to the wire coil (6), four wire grooves (17) are symmetrically arranged at the top of the clapboard (3), the four wire slots (17) correspond to the four fixing blocks (19), connecting wires (12) are wound on the four wire coils (6), one end of the connecting wire (12) penetrates through the fixing block (19) and the wire groove (17) and is fixedly connected with the top of the bottom plate (4), four wire guide wheels (11) are rotationally connected to the fixing block (19), and the wire guide wheels (11) are attached to the connecting wire (12).
3. The projection display device for teaching as claimed in claim 1, wherein the power assembly comprises a motor (8) fixedly mounted at the bottom of the mounting box (2), one side of the motor (8) is attached to one inner wall of the mounting box (2), an output shaft of the motor (8) is fixedly connected with one end of a first shaft rod (7), a first gear (9) is fixedly sleeved on the outer wall of the first shaft rod (7), the first gear (9) is located in the mounting box (2), a second gear (16) is fixedly sleeved on one end of a second shaft rod (14), and the second gear (16) is engaged with the first gear (9).
4. The projection display device for teaching according to claim 1, wherein the fixing component comprises fixing grooves (23) disposed at two ends of a baffle (24), the inner walls of two sides of the opening of the protective box (5) are both provided with grooves (28), the grooves (28) correspond to the fixing grooves (23), the inner walls of the grooves (28) are provided with fixing rods (25), one ends of the fixing rods (25) extend into the fixing grooves (23), the outer walls of the fixing rods (25) are fixedly sleeved with limiting plates (26), the limiting plates (26) are located in the grooves (28) and are slidably connected with the inner walls of the grooves (28), the outer walls of the fixing rods (25) are sleeved with springs (27), two ends of the springs (27) are respectively attached to one side of the limiting plates (26) and one side of the inner walls of the grooves (28), one ends of the fixing rods (25) penetrate through one side of the inner walls of the grooves (28) and extend to the outside of the protective box (5), one end of the fixing rod (25) is fixedly provided with a circular plate (20), and the circular plate (20) is positioned on one side of the protective box (5).
5. The projection display device for teaching according to claim 1, wherein two bearings (15) are symmetrically and fixedly installed on the inner walls of two sides of the mounting rack (1), and two ends of the first shaft rod (7) and the second shaft rod (14) penetrate through the inner rings of the corresponding bearings (15) and are welded with the inner walls of the bearings (15).
6. The projection display device for teaching according to claim 1, wherein a pressure plate (18) is fixedly installed on the inner wall of the top of the protective box (5), and the bottom of the pressure plate (18) is attached to the top of the projector (13).
7. The projection display device for teaching as claimed in claim 1, wherein a plurality of mounting plates (30) are fixedly mounted on the tops of two sides of the mounting frame (1), and mounting holes (29) are formed in the plurality of mounting plates (30).
8. The projection display device for teaching according to claim 1, wherein two stabilizing plates (31) are symmetrically and fixedly installed on the top of the bottom plate (4), and one side of each of the two stabilizing plates (31) is attached to the inner walls of the two sides of the mounting frame (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011606735.0A CN112927567A (en) | 2020-12-30 | 2020-12-30 | Projection display device of teaching usefulness |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011606735.0A CN112927567A (en) | 2020-12-30 | 2020-12-30 | Projection display device of teaching usefulness |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112927567A true CN112927567A (en) | 2021-06-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011606735.0A Pending CN112927567A (en) | 2020-12-30 | 2020-12-30 | Projection display device of teaching usefulness |
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| Country | Link |
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| CN (1) | CN112927567A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113639158A (en) * | 2021-09-01 | 2021-11-12 | 深圳市炫之风文化创意有限公司 | Immersive projection equipment for exhibition hall |
| CN115164072A (en) * | 2022-07-14 | 2022-10-11 | 深圳市华竣展览有限公司 | Stereoscopic projection equipment is used in show of digital museum |
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| KR20000061825A (en) * | 1999-03-31 | 2000-10-25 | 노주석 | Lifter |
| CN107146480A (en) * | 2017-07-06 | 2017-09-08 | 谢然 | A kind of computer based multimedia teaching instrument |
| CN107906310A (en) * | 2017-11-24 | 2018-04-13 | 郑州涵莱智能科技有限公司 | A kind of height adjustment device of smart projector |
| CN108006414A (en) * | 2017-12-27 | 2018-05-08 | 张志海 | A kind of Multifunctional projection equipment for being used to impart knowledge to students |
| CN108675175A (en) * | 2018-05-04 | 2018-10-19 | 安徽超越环保科技有限公司 | A kind of hydraulic-driven hanger flexible connecting device |
| CN208670466U (en) * | 2018-07-25 | 2019-03-29 | 宣韬 | A kind of language teaching Liftable type projection device |
| CN110889981A (en) * | 2019-10-23 | 2020-03-17 | 西安科成新果信息科技有限公司 | Information science and technology is with teaching projection equipment convenient to clearance and maintenance |
| CN210319325U (en) * | 2019-07-23 | 2020-04-14 | 南京音汇律成智能科技有限公司 | Projector hanging bracket convenient for angle adjustment |
| CN211281347U (en) * | 2019-11-06 | 2020-08-18 | 徐州博虎电动车科技有限公司 | Controller with automatic parking function of electric vehicle |
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2020
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Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20000061825A (en) * | 1999-03-31 | 2000-10-25 | 노주석 | Lifter |
| CN107146480A (en) * | 2017-07-06 | 2017-09-08 | 谢然 | A kind of computer based multimedia teaching instrument |
| CN107906310A (en) * | 2017-11-24 | 2018-04-13 | 郑州涵莱智能科技有限公司 | A kind of height adjustment device of smart projector |
| CN108006414A (en) * | 2017-12-27 | 2018-05-08 | 张志海 | A kind of Multifunctional projection equipment for being used to impart knowledge to students |
| CN108675175A (en) * | 2018-05-04 | 2018-10-19 | 安徽超越环保科技有限公司 | A kind of hydraulic-driven hanger flexible connecting device |
| CN208670466U (en) * | 2018-07-25 | 2019-03-29 | 宣韬 | A kind of language teaching Liftable type projection device |
| CN210319325U (en) * | 2019-07-23 | 2020-04-14 | 南京音汇律成智能科技有限公司 | Projector hanging bracket convenient for angle adjustment |
| CN110889981A (en) * | 2019-10-23 | 2020-03-17 | 西安科成新果信息科技有限公司 | Information science and technology is with teaching projection equipment convenient to clearance and maintenance |
| CN211281347U (en) * | 2019-11-06 | 2020-08-18 | 徐州博虎电动车科技有限公司 | Controller with automatic parking function of electric vehicle |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113639158A (en) * | 2021-09-01 | 2021-11-12 | 深圳市炫之风文化创意有限公司 | Immersive projection equipment for exhibition hall |
| CN115164072A (en) * | 2022-07-14 | 2022-10-11 | 深圳市华竣展览有限公司 | Stereoscopic projection equipment is used in show of digital museum |
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Application publication date: 20210608 |
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