CN113223338A - Multimedia presentation device - Google Patents
Multimedia presentation device Download PDFInfo
- Publication number
- CN113223338A CN113223338A CN202110392378.0A CN202110392378A CN113223338A CN 113223338 A CN113223338 A CN 113223338A CN 202110392378 A CN202110392378 A CN 202110392378A CN 113223338 A CN113223338 A CN 113223338A
- Authority
- CN
- China
- Prior art keywords
- protective cover
- projection
- presentation device
- multimedia presentation
- screen
- 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.)
- Granted
Links
- 230000001681 protective effect Effects 0.000 claims abstract description 53
- 230000003014 reinforcing effect Effects 0.000 claims abstract description 21
- 238000004804 winding Methods 0.000 claims description 24
- 230000005540 biological transmission Effects 0.000 claims description 17
- 238000004140 cleaning Methods 0.000 claims description 8
- 229920000742 Cotton Polymers 0.000 claims description 7
- 238000009434 installation Methods 0.000 claims description 3
- 230000005484 gravity Effects 0.000 claims description 2
- 238000006748 scratching Methods 0.000 claims description 2
- 230000002393 scratching effect Effects 0.000 claims description 2
- 230000000903 blocking effect Effects 0.000 claims 1
- 239000000428 dust Substances 0.000 abstract description 6
- 230000000694 effects Effects 0.000 description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 241001310793 Podium Species 0.000 description 1
- 241000190070 Sarracenia purpurea Species 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
Images
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
- B08B1/14—Wipes; Absorbent members, e.g. swabs or sponges
- B08B1/143—Wipes
-
- 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
- B08B1/20—Cleaning of moving articles, e.g. of moving webs or of objects on a conveyor
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- 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
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D10/00—Energy efficient computing, e.g. low power processors, power management or thermal management
Landscapes
- 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)
- Overhead Projectors And Projection Screens (AREA)
Abstract
The invention discloses a multimedia presentation device, which can avoid the shielding of a teacher on multimedia projection when walking, ensure the normal watching and learning of students below, meanwhile, the device can clean the projection screen, avoid dust generated by using the projection screen for a long time, it is characterized in that two fixing seats are fixed at the top of the protective cover through nuts, each fixing seat consists of an L-shaped plate and a triangular reinforcing rib, one end of each L-shaped plate is fixedly arranged at the edge of the protective cover through two rows of nuts, the other end of each L-shaped plate extends out of the protective cover from the edge of the protective cover and is bent upwards for 90 degrees, two through holes are arranged at the other end of the L-shaped plate, the other end of the L-shaped plate is close to one side of the protection plate, the triangular reinforcing ribs are fixedly arranged in the middle of the L-shaped plate, reinforcing seats are arranged at two ends of the protective cover, each reinforcing seat is of an L-shaped structure, and one end of each L-shaped structure is fixedly arranged at the edge of the end part of the protective cover through a nut.
Description
Technical Field
The invention discloses a multimedia presentation device, relates to a multimedia presentation device, and belongs to the technical field of projectors. In particular to a device which can avoid the shielding of multimedia projection when a teacher walks, ensure the normal watching and learning of students below, clear up a projection screen and avoid the dust generated by using the projection screen for a long time.
Background
At present, multimedia projection presentation device all has extensive application in each trade, it is used for large-scale lecture show more, among the environment of classroom teaching and training explanation, and the multimedia presentation device who is applied to the teaching training now, it projects on the projection screen through the optical projector mostly, and the instructor is when explaining, can often make a round trip to walk around habitually on the podium, shelter from the demonstration picture of projecting apparatus and curtain very easily, the training personnel of listening and speaking who leads to the below can not see the projection picture of panorama, and influence training and lecture bandwagon effect.
Notice No. CN209343123U discloses a can projection demonstration multifunctional display device, including side lever and arc top, the top fixedly connected with arc top of side lever, the first motor case of inside fixedly connected with and the second motor case of side lever, the inside of second motor case is provided with first motor, the output swing joint of first motor has the pivot, one side fixedly connected with curtain book of keeping away from first motor of pivot, this display device's curtain book are single curtain book structure, and when the show, the picture on the curtain book is walked around and is sheltered from by the making a round trip of lecturer easily, influences student's watching and study.
The bulletin No. CN108535946A discloses a multifunctional teaching demonstration device, which comprises a slide rail arranged on a platform, wherein two groups of display units are connected on the slide rail in a sliding manner, and each group of display units comprises a curtain and a projector arranged in front of the curtain; the bottom end of the sliding rail is provided with a plurality of air bags capable of pushing the display unit to move; all the air bags are connected together to form a foot pad covering the surface of the platform; and a hydraulic bag filled with clear water is arranged between the two air bags at intervals, and all the hydraulic bags are communicated; the hydraulic bag positioned on one side of the foot pad is connected with a water outlet pipe extending to the upper part of the teacher's desk; the water cup for receiving water is arranged below the water outlet pipe, and the device is too complex in structural function and high in cost.
Disclosure of Invention
In order to improve the situation, the multimedia presentation device provided by the invention can avoid the shielding of a teacher on multimedia projection when walking, ensure the normal watching and learning of students below, and simultaneously can clean the projection screen and avoid dust generated by long-time use of the projection screen.
The multimedia presentation device of the present invention is realized as follows: the invention relates to a multimedia demonstration device which comprises a protective cover, fixing seats, reinforcing seats, a first projection screen, a blank screen, a weighting block, a second projection screen, a traction rope, a transmission chain, a second winding roller, a connecting shaft, a cleaning cotton, a first winding roller, a driving motor, a transmission gear and a strip-shaped groove, wherein the top of the protective cover is fixedly provided with two fixing seats through nuts, each fixing seat comprises an L-shaped plate and a triangular reinforcing rib, one end of each L-shaped plate is fixedly arranged at the edge of the protective cover through two rows of nuts, the other end of each L-shaped plate extends out of the protective cover from the edge of the protective cover and is bent upwards by 90 degrees, the other end of each L-shaped plate is provided with two through holes, the other end of each L-shaped plate is close to one side of the protective cover, the triangular reinforcing ribs are fixedly arranged at the middle parts of the L-shaped plates, the reinforcing seats are arranged at the two ends of the protective cover, each reinforcing seat is of an L-shaped structure, one end of each L-shaped structure is fixedly arranged at the edge of the end part of the protective cover through a nut, the other end of the L-shaped structure extends out of the protective cover from the edge of the protective cover and is bent by 90 degrees towards the direction far away from the protective cover, the other end of the L-shaped structure is provided with a through groove, the through groove and the through hole are positioned on the same straight line, both sides of the bottom of the protective cover are provided with strip-shaped grooves, cleaning cotton is arranged at the edges of the strip-shaped grooves, one side in the protective cover is provided with a first roller through a connecting shaft, the other side in the protective cover is provided with a second roller through the connecting shaft, one end of the first roller and one end of the second roller are sleeved with a transmission gear, the transmission gears on the first roller and the second roller are connected through a transmission chain, the other end of the first roller is fixedly provided with a driving motor, one ends of a projection screen and a traction rope are respectively wound on the first roller and the second roller, and the other ends of the projection screen and the traction rope correspondingly penetrate through the strip-shaped grooves on both sides of the bottom of the protective cover and extend out of the protective cover, the other end of projection curtain is overhead to be put there is the blank curtain, has No. two projection curtains on the other end of haulage rope, the bottom of blank curtain and No. two projection curtains is all fixed with the weight block.
Has the beneficial effects.
Firstly, can avoid the teacher to the sheltering from of multimedia projection when walking about, guarantee the student's of below normal watch and study.
And secondly, the lecturer can conveniently carry out back and forth walking explanation, and excessive shielding of the picture is avoided.
Thirdly, can clear up the projection screen, avoid using the projection screen for a long time and the dust that produces.
Drawings
FIG. 1 is a perspective view of a multimedia presentation apparatus according to the present invention;
FIG. 2 is a schematic diagram of a multimedia presentation apparatus according to the present invention;
FIG. 3 is a schematic view of a protective cover of a multimedia presentation apparatus according to the present invention;
FIG. 4 is a perspective view of a first winding roller of the multimedia presentation apparatus of the present invention;
fig. 5 is a bottom view of a multimedia presentation apparatus of the present invention.
In the attached drawings
Wherein the method comprises the following steps: the protective cover comprises a protective cover (1), a fixed seat (2), a reinforcing seat (3), a first projection screen (4), a blank screen (5), a weighting block (6), a second projection screen (7), a traction rope (8), a transmission chain (9), a second winding roller (10), a connecting shaft (11), a cleaning cotton (12), a first winding roller (13), a driving motor (14), a transmission gear (15) and a strip-shaped groove (16).
The specific implementation mode is as follows:
the multimedia presentation device of the present invention is realized as follows: the invention discloses a multimedia demonstration device which comprises a protective cover (1), fixing seats (2), a reinforcing seat (3), a first projection screen (4), a blank screen (5), a weighting block (6), a second projection screen (7), a traction rope (8), a transmission chain (9), a second winding roller (10), a connecting shaft (11), a cleaning sponge (12), a first winding roller (13), a driving motor (14), a transmission gear (15) and a strip-shaped groove (16), wherein the top of the protective cover (1) is fixedly provided with two fixing seats (2) through nuts, the fixing seats (2) comprise L-shaped plates and triangular reinforcing ribs, one ends of the L-shaped plates are fixedly arranged at the edges of the protective cover (1) through two rows of nuts, the other ends of the L-shaped plates extend out of the protective cover (1) from the edges of the protective cover (1) and are bent upwards by 90 degrees, and two through holes are formed in the other ends of the L-shaped plates, the other end of the L-shaped plate is close to one side of the protection plate, the triangular reinforcing ribs are fixedly arranged in the middle of the L-shaped plate, reinforcing seats (3) are arranged at two ends of the protection cover (1), the reinforcing seats (3) are of an L-shaped structure, one end of the L-shaped structure is fixedly arranged at the end edge of the protection cover (1) through nuts, the other end of the L-shaped structure extends out of the protection cover (1) from the edge of the protection cover (1) and is bent by 90 degrees towards the direction far away from the protection cover (1), through grooves are formed in the other end of the L-shaped structure, the through grooves and the through holes are located on the same straight line, strip-shaped grooves (16) are formed in two sides of the bottom of the protection cover (1), cleaning cotton is arranged at the edges of the strip-shaped grooves (16), a first winding roller (13) is arranged on one inner side of the protection cover (1) through a connecting shaft (11), a second winding roller (10) is arranged on the other inner side of the protection cover (1), a transmission gear (15) is sleeved at one end of the first winding roller (13) and the second winding roller (10), a transmission gear (15) on the first winding roller (13) and the second winding roller (10) is connected through a transmission chain (9), a driving motor (14) is fixedly arranged at the other end of the first winding roller (13), one ends of a first projection screen (4) and a traction rope (8) are respectively wound on the first winding roller (13) and the second winding roller (10), the other ends of the first projection screen (4) and the traction rope (8) correspondingly penetrate through strip-shaped grooves (16) on two sides of the bottom of the protective cover (1) and extend out of the protective cover (1), an empty curtain (5) is arranged at the other end of the projection screen, a second projection screen (7) is arranged at the other end of the traction rope (8), and weighting blocks (6) are fixedly arranged at the bottoms of the empty curtain (5) and the second projection screen (7);
when the device is used, the device is fixed on a wall through the fixed seat (2) and the reinforcing seat (3), because the other end of the L-shaped plate and the other end of the L-shaped structure extend out of the protective cover (1) from the edge of the protective cover (1), a gap can exist between the device and the wall after installation, the starting device enables the first roller (13) to rotate through the driving motor (14), the first roller (13) rotates and drives the second roller (10) to rotate through the transmission gear (15) and the transmission chain (9) in a matching way, the first projection screen (4) is retracted at the same time, the second projection screen (7) is released, the second projection screen (7) is positioned in front of the first projection screen (4), the width between the two projection screens is enough for a teacher to move back and forth, the lower half part of an image projected by a projector is released on the second projection screen (7), and the upper half part of the image is released on the first projection screen (4) at the rear part, through the staggered gap between the first projection screen and the second projection screen (7), the shielding of a teacher on multimedia projection when walking can be effectively avoided, and the normal watching and learning of students below are ensured;
the space of the interval is reserved for the space of the back-and-forth movement of the instructor, and meanwhile, the problem that the projection is not shielded due to the back-and-forth movement of the personnel is avoided. Two sides of two groups of strip-shaped grooves (16) at the bottom of the protective cover (1) are provided with cleaning cotton (12) which can clean the first projection screen and the second projection screen (7).
The other end of the L-shaped plate is provided with two through holes, so that the fixing seat (2) can be conveniently fixed on a wall through a screw, and the effect of fixing the device is enhanced;
the design that the triangular reinforcing ribs are fixedly arranged in the middle of the L-shaped plate can improve the structural strength of the fixing seat (2) and avoid the deformation of the fixing seat (2) when the device is fixed, so that the use effect of the device is influenced;
the other end of the L-shaped structure is provided with a through groove, so that the reinforcing seat (3) can be conveniently fixed on a wall through a screw, and the effect of fixing the device is enhanced;
the design that the through grooves and the through holes are positioned on the same straight line can avoid the fixing effect of the through grooves and the through holes from being influenced by different front and back positions;
the design of cleaning cotton is arranged at the edge of the strip-shaped groove (16), so that a first projection screen and a second projection screen (7) can be cleaned, and the phenomenon that the projection screens are not collected into the protective cover (1) for a long time to generate dust so as to influence the watching effect during projection is avoided;
the design that the weighting blocks (6) are fixedly arranged at the bottoms of the air curtain (5) and the second projection screen (7) respectively can guide the air curtain (5) and the second projection screen (7), and the air curtain (5) and the second projection screen (7) are prevented from being clamped at the strip-shaped groove (16) due to too light weight under the action of gravity of the weighting blocks (6) when being rolled out and put down, so that the device is damaged, meanwhile, the air curtain (5) and the second projection screen (7) can be limited, and the air curtain (5) and the second projection screen (7) are prevented from being completely taken into the protective cover (1) when being folded, and further cannot be rolled out next time;
due to the design that a gap exists between the device and the wall after installation, the protective cover (1) can be protected, and the protective cover (1) is effectively prevented from being damaged due to scratching of the wall;
reach and to the sheltering from of multimedia projection when can avoiding the teacher to walk about, guarantee below student's normal watching and study, can clear up the projection curtain simultaneously, avoid using the projection curtain for a long time and the purpose of the dust that produces.
Claims (10)
1. A multimedia presentation device is characterized in that: the top of the protective cover is fixedly provided with two fixing seats through nuts, each fixing seat consists of an L-shaped plate and a triangular reinforcing rib, one end of each L-shaped plate is fixedly arranged at the edge of the protective cover through two rows of nuts, the other end of each L-shaped plate extends out of the protective cover from the edge of the protective cover and is bent upwards by 90 degrees, reinforcing seats are arranged at the two ends of the protective cover and are of L-shaped structures, one end of each L-shaped structure is fixedly arranged at the edge of the end part of the protective cover through the nuts, the other end of each L-shaped structure extends out of the protective cover from the edge of the protective cover and is bent by 90 degrees in the direction away from the protective cover, strip-shaped grooves are formed in the two sides of the bottom of the protective cover, a first winding roller is arranged on one side in the protective cover through a connecting shaft, a transmission gear is sleeved on one end of the first winding roller and one end of the second winding roller, and the transmission gears on the first winding roller and the second winding roller are connected through a transmission chain, the other end of a winding up roller is fixed with driving motor, and the one end of a projection curtain and haulage rope twines respectively on a winding up roller and No. two winding up rollers, and the other end correspondence of a projection curtain and haulage rope passes the bar groove of protection casing bottom both sides and extends to outside the protection casing, and the other end overhead of projection curtain has the sky white curtain, has put No. two projection curtains on the other end of haulage rope.
2. A multimedia presentation device according to claim 1, wherein, in use, the second screen is positioned in front of the first screen, the width between the two screens being sufficient for the instructor to move around.
3. The multimedia presentation device according to claim 2, wherein the second projection screen is used to project the lower half of the image projected by the projector, and the first projection screen is used to project the upper half of the image, so that the blocking of the multimedia projection by the instructor during walking can be effectively avoided by the staggered gaps between the first and second projection screens, thereby ensuring the normal watching and learning of students below.
4. The multimedia presentation device of claim 1, wherein the L-shaped plate has two through holes formed at the other end thereof, and the other end of the L-shaped plate is adjacent to one side of the protection plate.
5. The multimedia presentation device of claim 1, wherein the triangular reinforcing ribs are fixedly disposed in the middle of the L-shaped plate.
6. A multimedia presentation device as claimed in claim 1, wherein a through slot is provided at the other end of said L-shaped structure.
7. A multimedia presentation device according to claim 6, wherein the through slots and the through holes are located in the same line.
8. The multimedia presentation device according to claim 1, wherein the weight is fixed to the bottom of each of the blank screen and the second projection screen, so that the blank screen and the second projection screen can be guided, and the blank screen and the second projection screen are prevented from being jammed in the strip-shaped groove due to too light weight under the gravity action of the weight when being rolled out and put down, thereby damaging the device, and meanwhile, the blank screen and the second projection screen can be limited, thereby preventing the blank screen and the second projection screen from being completely retracted into the protective cover when being folded up, and further preventing the blank screen and the second projection screen from being unable to be rolled out next time.
9. The multimedia presentation device according to claim 1, wherein a gap is formed between the device and the wall after installation, so that the protective cover can be protected, and damage caused by scratching the wall due to the protective cover can be effectively avoided.
10. The multimedia presentation device of claim 1, wherein cleaning cotton is disposed at the edge of the strip-shaped groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110392378.0A CN113223338B (en) | 2021-04-13 | 2021-04-13 | Multimedia presentation device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110392378.0A CN113223338B (en) | 2021-04-13 | 2021-04-13 | Multimedia presentation device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113223338A true CN113223338A (en) | 2021-08-06 |
| CN113223338B CN113223338B (en) | 2023-08-08 |
Family
ID=77087475
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110392378.0A Active CN113223338B (en) | 2021-04-13 | 2021-04-13 | Multimedia presentation device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113223338B (en) |
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| Publication number | Publication date |
|---|---|
| CN113223338B (en) | 2023-08-08 |
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