CN113160618A - Multimedia teaching equipment - Google Patents
Multimedia teaching equipment Download PDFInfo
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- CN113160618A CN113160618A CN202110222276.4A CN202110222276A CN113160618A CN 113160618 A CN113160618 A CN 113160618A CN 202110222276 A CN202110222276 A CN 202110222276A CN 113160618 A CN113160618 A CN 113160618A
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- rod
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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
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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
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- Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Business, Economics & Management (AREA)
- Educational Administration (AREA)
- Educational Technology (AREA)
- Theoretical Computer Science (AREA)
- Curtains And Furnishings For Windows Or Doors (AREA)
Abstract
The invention discloses multimedia teaching equipment, relates to the technical field of projection screens, and solves the problems that an existing projection screen is not provided with an automatic tightening device when being unfolded, the screen cannot stretch and flatten the bent part of the screen completely, and the teaching use effect is influenced. A multimedia teaching apparatus includes a clutch post; the clutch column is rotatably connected inside the lifting platform. The device is through the use height that changes separation and reunion post top separation and reunion worm for the separation and reunion worm can drive the projection curtain through propping tight mechanism and hang down and prop tight the use with the projection curtain when low level uses, can be complete, the real projection teaching that carries out the character image, makes the effect of projection teaching better, thereby the separation and reunion worm can drive the curtain rolling rod and rotate the backrush projection curtain and retrieve when high-order use, and the use is stable, convenient and fast.
Description
Technical Field
The invention belongs to the technical field of projection curtains, and particularly relates to multimedia teaching equipment.
Background
At present, in the multimedia teaching process, multimedia information display and transmission are often realized by matching a projection curtain with a projector, and the projection curtain is widely applied to the fields of teaching, meetings, training and the like, and is a tool for displaying images and video files on the occasions of movies, offices, home theaters, large conferences and the like.
If the application number is: in CN 201711295790.0's patent, a multimedia teaching is with slowly falling formula display is disclosed, including display frame, display screen, climbing mechanism, bracing piece, the multimedia teaching equipment table body, electric putter and slowly falling the ware, multimedia teaching equipment table body upper end is equipped with the work desktop, installs the computer on the work desktop, and multimedia teaching equipment table body internally mounted has slowly falls the ware, slowly falls ware upper portion joint support pole, and the display frame is installed on the bracing piece top, and the display screen is installed in the embedding of display frame front side, be equipped with climbing mechanism on the bracing piece, electric putter is connected to climbing mechanism, and electric putter installs at the multimedia teaching equipment table internally.
The device that does not prop tightly automatically when current projection curtain expandes for the curtain can only rely on gravity automatic flagging expansion under the drive of motor, and the curtain roll-up easily produces crooked phenomenon in the reel, and the curtain flagging expansion is obvious can not be with the complete stretching of the crooked position of curtain under the action of gravity flat, and the crooked position of curtain appears the image easily when the projection phenomenon such as buckle, distortion when teaching, influences the teaching result of use, and the practicality is not high.
In view of this, research and improvement are performed on the existing structure and defects, and a multimedia teaching apparatus is provided to achieve the purpose of higher practical value.
Disclosure of Invention
In order to solve the technical problems, the invention provides multimedia teaching equipment, which aims to solve the problems that the existing projection screen is not provided with an automatic tightening device when being unfolded, so that the screen can only automatically sag and unfold under the driving of a motor by means of gravity, the screen is wound in a winding drum and is easy to bend, the curtain can obviously sag and unfold under the action of gravity and cannot completely stretch and flatten the bent part of the screen, the bent part of the screen is easy to bend and distort images during teaching when being projected, the teaching use effect is influenced, and the practicability is not high.
The purpose and the effect of the multimedia teaching equipment are achieved by the following specific technical means:
a multimedia teaching device comprises a curtain cover, a projection curtain, a support control rod, a tightening mechanism, a clutch column and a driving motor; the curtain cloth cover is screwed and fixed in the frame body of the fixed outer frame through screws; one end of the projection curtain is fixedly connected to the rod body of the curtain winding rod, and the other end of the projection curtain is fixedly connected to the top of the plate body of the fixing plate; the two ends of the rod body of the support control rod and the rod body of the curtain winding rod are respectively and rotatably connected inside the side plate of the fixed outer frame; the tightening mechanism consists of a tightening top rod and a tightening bottom rod; the bottom of the tightening top rod is rotatably connected to the top of the tightening bottom rod; the top of the tightening top rod is rotatably connected inside the fixed outer frame, and the bottom end of the tightening bottom rod is rotatably connected to one end of the plate body of the fixed plate; the clutch column is rotationally connected inside the lifting platform; the lifting platform is inserted into the fixed outer frame; the driving motor is screwed and fixed on the top surface of the side plate of the fixed outer frame through screws, and the driving motor is electrically connected with an external power supply and the control device.
Furthermore, a transmission gear is arranged at the top of the tightening ejector rod, two symmetrical coaxial gears are arranged at two ends of the rod body of the supporting control rod, and the transmission gear is in meshing transmission with gear teeth of the coaxial gears.
Further, the mounting height of curtain rolling rod is higher than the mounting height of support control lever, and the body of rod one end of curtain rolling rod is equipped with the roll-up gear, and the body of rod one end of support control lever is equipped with props tight gear, and the roll-up gear is the worm wheel design with propping tight gear.
Furthermore, the top of the clutch column is provided with a clutch worm, and the length of the clutch worm is smaller than the height between the circle centers of the tightening gear and the furling gear.
Furthermore, a transmission protrusion is arranged at the top end of the rotating rod of the driving motor, a transmission groove is formed in the bottom of the clutch column body, and the transmission protrusion is inserted into the transmission groove.
Furthermore, the outside of the rod body in the middle of the driving motor rotating rod is provided with threads, the middle of the transverse plate at the bottom of the lifting platform is provided with a height control hole, the height control hole is designed as a threaded hole, and the threads in the middle of the driving motor rotating rod are screwed in the height control hole.
Further, the inside locating plate that is equipped with of right side board of fixed frame framework, and the locating plate is equipped with two of symmetry, and locating plate body cross sectional shape is "C" shape, and the plate internal portion of locating plate is equipped with the track post, and elevating platform bottom diaphragm pegs graft in the outside of track post cylinder, and the main part outside that the track post is located elevating platform top and bottom has all cup jointed positioning spring.
Compared with the prior art, the invention has the following beneficial effects:
the device is through the use height that changes separation and reunion post top separation and reunion worm for the separation and reunion worm can drive the projection curtain through propping tight mechanism and hang down and prop tight the use with the projection curtain when low level uses, can be complete, the real projection teaching that carries out the text image, make the effect of projection teaching better, thereby the separation and reunion worm can drive the curtain winding rod and rotate the backrush projection curtain and retrieve when high-order use, and the use is stable, convenient and fast, the flexibility and the practicality of the device have been improved.
Firstly, when the driving motor rotates reversely, the thread in the middle of the driving motor rotating rod can be screwed into the inside of the height control hole and rotates to the top of the lifting platform bottom plate to press the lifting platform downwards, and the driving motor continues to rotate reversely and can not be screwed in the inside of the height control hole any more, so that the clutch worm only transmits with the tightening gear at the moment, thereby being capable of controlling the rotation of the supporting control rod, the coaxial gear of the supporting control rod drives the tightening mandril to swing through the transmission gear to drive the whole tightening mechanism to draw out and expand the projection curtain tightly, and the clutch worm can not transmit with the furling gear at the moment, the furling gear can idle and can not block the device, thereby realizing the expansion and tightening use of the projection curtain, being capable of completely stretching and unfolding the bent part of the projection curtain for use, being capable of completely and truly carrying out the projection teaching of text images, and enabling the effect of the projection teaching to be better, the flexibility and the practicability of the device are improved.
Secondly, when driving motor corotation, the screw thread at driving motor bull stick middle part can twist through the height control hole and rotate the bottom of elevating platform bottom plate with the elevating platform lifting, and driving motor continues corotation this moment and no longer can twist the inside of inserting the height control hole, the separation and reunion worm can only with roll-up gear drive this moment, thereby realize retrieving the backrush to the projection curtain that has expanded, and the separation and reunion worm can not with prop tight gear drive this moment, so prop tight mechanism this moment and freely contract, thereby can not block dead device and can accomodate the complete backrush of projection curtain into the inside curtain rolling rod's of curtain cover outside, and is convenient and flexible, and the use is stable, and the stability of the device is improved.
Moreover, the transmission is protruding can provide the turning force for the separation and reunion post through the real-time transmission recess, can not lose driving motor's transmission because the lift of elevating platform is followed to the separation and reunion post, and stable in use, and positioning spring can make driving motor twist in the inside in high control hole through the screw thread at bull stick middle part more easily when just reversing, realizes the control to elevating platform and separation and reunion post height position, and is nimble convenient, and degree of automation is high, has improved the device flexibility and stability.
Drawings
Fig. 1 is a schematic structural view of the present invention.
FIG. 2 is a schematic view of the inside structure of the clutch worm of the present invention when the rewind projection screen is used at a high position.
FIG. 3 is a schematic view of the internal structure of the projection screen tightly supported by the clutch worm in the low position of the present invention.
Fig. 4 is a schematic view of the internal structure of the clutch post, the lifting platform and the driving motor after disassembly.
Figure 5 is a schematic view of the tightening mechanism and the fixing plate of the present invention.
FIG. 6 is a schematic view of the curtain rod and support control rod of the present invention.
Fig. 7 is an enlarged structural view of the portion a in fig. 2 according to the present invention.
Fig. 8 is an enlarged structural view of the portion B in fig. 3 according to the present invention.
In the drawings, the corresponding relationship between the component names and the reference numbers is as follows:
1. fixing the outer frame; 2. a screen cover; 3. a projection screen; 4. a curtain winding rod; 5. a support lever; 6. a tightening mechanism; 7. a clutch column; 8. a lifting platform; 9. a drive motor; 10. a fixing plate; 101. positioning a plate; 1011. a rail post; 1012. a positioning spring; 401. rolling up the gear; 501. a coaxial gear; 502. tightening the gear; 601. supporting the mandril tightly; 602. tightly supporting the bottom rod; 6011. a transmission gear; 701. a clutch worm; 702. a transmission groove; 801. a height control aperture; 901. and a transmission protrusion.
Detailed Description
The embodiments of the present invention will be described in further detail with reference to the drawings and examples. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.
In the description of the present invention, "a plurality" means two or more unless otherwise specified; the terms "upper", "lower", "left", "right", "inner", "outer", "front", "rear", "head", "tail", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are only for convenience in describing and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, should not be construed as limiting the invention. Furthermore, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "connected" and "connected" are to be interpreted broadly, e.g., as being fixed or detachable or integrally connected; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Example (b):
as shown in figures 1 to 8:
the invention provides multimedia teaching equipment, which comprises a curtain cover 2, a projection curtain 3, a support control rod 5, a tightening mechanism 6, a clutch column 7 and a driving motor 9, wherein the projection curtain is arranged on the curtain cover; the curtain cover 2 is screwed and fixed in the frame body of the fixed outer frame 1 through screws; one end of the projection screen 3 is fixedly connected to the rod body of the screen winding rod 4, and the other end of the projection screen 3 is fixedly connected to the top of the plate body of the fixing plate 10; the two ends of the rod body of the support control rod 5 and the curtain winding rod 4 are respectively and rotatably connected inside the side plates of the fixed outer frame 1; the installation height of the curtain winding rod 4 is higher than that of the support control rod 5, a winding gear 401 is arranged at one end of a rod body of the curtain winding rod 4, a tightening gear 502 is arranged at one end of the rod body of the support control rod 5, and the winding gear 401 and the tightening gear 502 are both in worm wheel design, so that the device can be locked under the matching action of a clutch worm 701 and a worm wheel, the phenomenon that the projection curtain 3 is accidentally rewound or accidentally tightened when in use is prevented, the device can be stably used, and the stability of the device is improved; the tightening mechanism 6 consists of a tightening top rod 601 and a tightening bottom rod 602; the bottom of the tightening top rod 601 is rotatably connected to the top of the tightening bottom rod 602; the top of the tightening top rod 601 is rotatably connected inside the fixed outer frame 1, and the bottom end of the tightening bottom rod 602 is rotatably connected to one end of the plate body of the fixed plate 10; the top of the stretching ejector rod 601 is provided with a transmission gear 6011, two symmetrical coaxial gears 501 are arranged at two ends of a rod body of the supporting control rod 5, the transmission gear 6011 is in meshed transmission with gear teeth of the coaxial gears 501, the facility enables the coaxial gears 501 to drive the stretching mechanism 6 to automatically stretch when rotating, and the projection curtain 3 is pulled and stretched tightly for use, so that the device is convenient and fast, and the flexibility of the device is improved; the clutch column 7 is rotatably connected inside the lifting platform 8; the lifting platform 8 is inserted in the fixed outer frame 1; the driving motor 9 is screwed and fixed on the top surface of the side plate of the fixed outer frame 1 through screws, and the driving motor 9 is electrically connected with an external power supply and a control device, the specific structure and the working principle of the driving motor are the prior mature technology, and the description is not repeated herein; the top end of the rotating rod of the driving motor 9 is provided with a transmission protrusion 901, the bottom of the cylinder of the clutch column 7 is provided with a transmission groove 702, the transmission protrusion 901 is inserted into the transmission groove 702, the transmission protrusion 901 can provide rotating force for the clutch column 7 through the transmission groove 702 in real time, the transmission of the driving motor 9 cannot be lost due to the fact that the clutch column 7 follows the lifting of the lifting platform 8, and the use is stable.
Wherein, the top of the clutch column 7 is provided with a clutch worm 701, the length of the clutch worm 701 is smaller than the height between the circle centers of the tightening gear 502 and the furling gear 401, the design and the cooperation of the design and the different height designs of the furling gear 401 and the tightening gear 502 can ensure that the clutch worm 701 can only transmit with one of the furling gear 401 and the tightening gear 502 after being lifted, when the clutch worm 701 transmits with the tightening gear 502, the support control rod 5 can be controlled to rotate, the coaxial gear 501 of the support control rod 5 drives the tightening mandril 601 to swing downwards through the transmission gear 6011 to drive the whole tightening mechanism 6 to draw out and expand the projection curtain 3 tightly, and at the moment, the clutch worm 701 can not transmit with the furling gear 401, the furling gear 401 can idle without clamping the device, thereby realizing the expansion and tightening use of the projection curtain 3, and completely stretching and expanding and using the bent part of the projection curtain 3, can be complete, the real projection teaching that carries out the characters and images, make the effect of projection teaching better, separation and reunion worm 701 and roll-up gear 401 transmission, thereby realize carrying out the rollback to the projection curtain 3 that has expanded and retrieve, and separation and reunion worm 701 this moment can not with prop tight gear 502 transmission, so prop tight mechanism 6 this moment and can freely contract, thereby can accomodate into the outside of 2 inside curtain rolling rod 4 of curtain cover with the complete rollback of projection curtain 3 by the device of can not blocking, and is convenient and flexible, and the use is stable, the stability and the flexibility of the device have been improved.
Wherein, the outside of the rod body in the middle of the rotating rod of the driving motor 9 is provided with a thread, and the middle of the transverse plate at the bottom of the lifting platform 8 is provided with a height control hole 801, the height control hole 801 is designed as a threaded hole, and the thread in the middle of the rotating rod of the driving motor 9 is screwed in the height control hole 801, so that the device can realize the adjustment of the using height position of the clutch column 7 by controlling the positive and negative rotation of the driving motor 9, when the driving motor 9 rotates reversely, the thread in the middle of the rotating rod of the driving motor 9 can be screwed in the height control hole 801 and rotates to the top of the bottom plate of the lifting platform 8 to press the lifting platform 8, and at the moment, the driving motor 9 continues to rotate reversely and can not be screwed in the height control hole 801 any more, when the driving motor 9 rotates forwardly, the thread in the middle of the rotating rod of the driving motor 9 can be screwed in the height control hole 801 and rotates to the bottom of the bottom plate of the lifting platform 8 to lift the lifting platform 8, and at the moment, the driving motor 9 continues to rotate forwards and is not screwed into the height control hole 801 any more, so that the automation degree is high, and the flexibility and the adaptability of the device are improved.
Wherein, the inside locating plate 101 that is equipped with of right side board of fixed frame 1 framework, and locating plate 101 is equipped with two of symmetry, locating plate 101 plate body cross sectional shape is "C" shape, and the inside track post 1011 that is equipped with of plate body of locating plate 101, 8 bottom diaphragms of elevating platform are pegged graft in the outside of track post 1011 cylinder, and the track post 1011 is located the main part outside of 8 tops of elevating platform and bottom and has all cup jointed positioning spring 1012, positioning spring 1012 can make during driving motor 9 just reversing twist the inside at height control hole 801 through the screw thread at bull stick middle part more easily, the realization is to the control of 7 height positions of elevating platform 8 and separation and reunion post, it is nimble convenient, the automation degree is high, the device flexibility and stability have been improved.
The specific use mode and function of the embodiment are as follows:
in the invention, when the projection curtain 3 needs to be put down for use, the projection curtain 3 can be pulled down and tightly supported for use through the supporting mechanism 6 only by controlling the driving motor 9 to rotate reversely through the control device, when the driving motor 9 rotates reversely, the thread in the middle of the rotating rod of the driving motor 9 can be screwed into the inside of the height control hole 801 and rotates to the top of the bottom plate of the lifting platform 8 to press down the lifting platform 8, and at the moment, the driving motor 9 continues to rotate reversely and is not screwed into the inside of the height control hole 801 any more, so that the clutch worm 701 only transmits with the supporting gear 502, the supporting control rod 5 can be controlled to rotate, the coaxial gear 501 of the supporting control rod 5 drives the supporting mandril 601 to swing downwards through the transmission gear 6011 to drive the whole supporting mechanism 6 to draw out and expand and tightly support the projection curtain 3, and the clutch worm 701 does not transmit with the furling gear 401 at the moment, and the furling gear 401 can idle without clamping the device, therefore, the projection curtain 3 can be unfolded and tightened for use, the bent part of the projection curtain 3 can be completely stretched and unfolded for use, the projection teaching of characters and images can be completely and truly carried out, the projection teaching effect is better, when the projection curtain 3 needs to be recovered after being used, the curtain winding rod 4 can be driven to carry out rewinding recovery on the projection curtain 3 only by controlling the driving motor 9 to rotate forwards through the control device, when the driving motor 9 rotates forwards, the thread in the middle of the rotating rod of the driving motor 9 can be screwed into the height control hole 801 and rotates to the bottom of the bottom plate of the lifting platform 8 to lift the lifting platform 8, and at the moment, the driving motor 9 continues to rotate forwards and can not be screwed into the inside of the height control hole 801 any more, at the moment, the clutch worm 701 can only be in transmission with the winding gear 401, so that the unwound projection curtain 3 can be rewound and recovered, and the clutch worm 701 can not be in transmission with the tightening gear 502 at the moment, therefore, the tightening mechanism 6 can be freely contracted at the moment, the device can not be locked, thereby the complete rollback of the projection curtain 3 can be accommodated in the curtain cover 2 outside the curtain winding rod 4, the use is convenient and flexible, the device is stable, the device can be locked under the matching action of the clutch worm 701 and the worm gear, the phenomenon that the projection curtain 3 is accidentally rolled back or accidentally unfolded when in use is prevented, the device can be stably used, the transmission bulge 901 can provide rotating force for the clutch column 7 through the transmission groove 702 in real time, the transmission of the driving motor 9 can not be lost because the clutch column 7 follows the lifting of the lifting platform 8, the use is stable, and the positioning spring 1012 can enable the driving motor 9 to be more easily screwed in the height control hole 801 through the threads in the middle of the rotating rod when in the forward and reverse rotation, the control of the high and low positions of the lifting platform 8 and the clutch column 7 is realized, the device is flexible and convenient, and has high automation degree, the device is through changing the use height that 7 top separation and reunion worms 701 of separation and reunion post, make separation and reunion worm 701 can drive projection curtain 3 flagging and prop tight the use with projection curtain 3 through propping tight mechanism 6 when low-order use, can be complete, the real projection teaching that carries out the text image, make the effect of projection teaching better, thereby separation and reunion worm 701 can drive curtain rolling rod 4 when high-order use and rotate rollback projection curtain 3 and retrieve, and the use is stable, convenient and fast.
The embodiments of the present invention have been presented for purposes of illustration and description, and are not intended to be exhaustive or limited to the invention in the form disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art. The embodiment was chosen and described in order to best explain the principles of the invention and the practical application, and to enable others of ordinary skill in the art to understand the invention for various embodiments with various modifications as are suited to the particular use contemplated.
Claims (7)
1. A multimedia teaching apparatus, characterized by: comprises a curtain cover (2), a projection curtain (3), a support control rod (5), a tightening mechanism (6), a clutch column (7) and a driving motor (9); the curtain cloth cover (2) is screwed and fixed in the frame body of the fixed outer frame (1) through screws; one end of the projection screen (3) is fixedly connected to the rod body of the screen winding rod (4), and the other end of the projection screen (3) is fixedly connected to the top of the plate body of the fixing plate (10); the two ends of the rod body of the support control rod (5) and the rod body of the curtain winding rod (4) are respectively and rotatably connected inside the side plate of the fixed outer frame (1); the tightening mechanism (6) consists of a tightening top rod (601) and a tightening bottom rod (602); the bottom of the tightening top rod (601) is rotatably connected to the top of the tightening bottom rod (602); the top of the tightening top rod (601) is rotatably connected inside the fixed outer frame (1), and the bottom end of the tightening bottom rod (602) is rotatably connected to one end of the plate body of the fixed plate (10); the clutch column (7) is rotatably connected inside the lifting platform (8); the lifting platform (8) is inserted into the fixed outer frame (1); the driving motor (9) is screwed and fixed on the top surface of the side plate of the fixed outer frame (1) through screws, and the driving motor (9) is electrically connected with an external power supply and the control device.
2. A multimedia teaching apparatus as claimed in claim 1, wherein: the top of the tightening ejector rod (601) is provided with a transmission gear (6011), two symmetrical coaxial gears (501) are arranged at two ends of a rod body of the supporting control rod (5), and the transmission gear (6011) is meshed with gear teeth of the coaxial gears (501) for transmission.
3. A multimedia teaching apparatus as claimed in claim 1, wherein: the mounting height of curtain rolling rod (4) is higher than the mounting height of support control lever (5), and the body of rod one end of curtain rolling rod (4) is equipped with roll-up gear (401), and the body of rod one end of support control lever (5) is equipped with props tight gear (502), and roll-up gear (401) and prop tight gear (502) are the worm wheel design.
4. A multimedia teaching apparatus as claimed in claim 1, wherein: the top of the clutch column (7) is provided with a clutch worm (701), and the length of the clutch worm (701) is smaller than the height between the circle centers of the tightening gear (502) and the furling gear (401).
5. A multimedia teaching apparatus as claimed in claim 1, wherein: the top end of a rotating rod of the driving motor (9) is provided with a transmission protrusion (901), the bottom of a cylinder body of the clutch column (7) is provided with a transmission groove (702), and the transmission protrusion (901) is inserted into the transmission groove (702).
6. A multimedia teaching apparatus as claimed in claim 1, wherein: the screw thread is arranged on the outer portion of the rod body in the middle of the rotating rod of the driving motor (9), the middle of the transverse plate at the bottom of the lifting platform (8) is provided with a height control hole (801), the height control hole (801) is designed to be a threaded hole, and the screw thread in the middle of the rotating rod of the driving motor (9) is screwed in the height control hole (801).
7. A multimedia teaching apparatus as claimed in claim 1, wherein: fixed frame (1) the inside locating plate (101) that is equipped with of right side board of framework, and locating plate (101) are equipped with two of symmetry, and locating plate (101) plate body cross sectional shape is "C" shape, and the inside track post (1011) that is equipped with of plate body of locating plate (101), and elevating platform (8) bottom diaphragm is pegged graft in the outside of track post (1011) cylinder, and the main part outside that track post (1011) are located elevating platform (8) top and bottom has all cup jointed positioning spring (1012).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110222276.4A CN113160618B (en) | 2021-02-28 | 2021-02-28 | Multimedia teaching equipment |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110222276.4A CN113160618B (en) | 2021-02-28 | 2021-02-28 | Multimedia teaching equipment |
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| CN113160618A true CN113160618A (en) | 2021-07-23 |
| CN113160618B CN113160618B (en) | 2022-11-01 |
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| CN202110222276.4A Active CN113160618B (en) | 2021-02-28 | 2021-02-28 | Multimedia teaching equipment |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114660881A (en) * | 2022-03-28 | 2022-06-24 | 深圳市福佑铭信息技术有限公司 | Automatic retraction device for image projection screen |
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| CN113160618B (en) | 2022-11-01 |
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Effective date of registration: 20221009 Address after: 725000 little giant industrial park, No. 39, Chuangxin Road, high tech Industrial Development Zone, Ankang City, Shaanxi Province Applicant after: Shaanxi EasyVision Tongda Technology Co.,Ltd. Address before: 276800 1001, unit 1, building 2, shuijingcheng, Donggang District, Rizhao City, Shandong Province Applicant before: Xia Peizhun |
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