Digital media teaching based hidden projection curtain integrated device

Abstract

The application discloses a hidden projection curtain integrated device based on digital media teaching, which comprises a base, a projector, a telescopic cylinder, a curtain frame, a turnover device and a curtain. The base comprises a first accommodating cavity and a second accommodating cavity. The upper end of the first accommodating cavity is provided with a cover plate which is rotationally connected. The projector is installed on the cover plate. The telescopic cylinder is arranged in the second accommodating cavity. The power output end of the telescopic cylinder is connected with the bottom of the curtain frame. The turnover device is arranged on the curtain frame. The turnover device comprises a first turnover plate, a second turnover plate and a rotating mechanism. The first turnover plate and the second turnover plate are installed on the rotating mechanism. The rotating mechanism drives the first turnover plate and the second turnover plate to rotate and separate or approach each other. One end of the curtain is connected with the first turnover plate, and the other end of the curtain is connected with the second turnover plate. Compared with the prior art, the device is convenient to arrange and store, and is more convenient to operate. Meanwhile, the curtain can be prevented from being scratched during carrying, and has better protection effect.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of projection screen device, in particular to a hidden projection screen integrated device based on digital media teaching. BACKGROUND

[0002] With the rapid development of science and technology, multimedia projection devices have been widely used in media teaching. The projection screen is one of the most commonly used products in multimedia projection devices. The projection screen is mainly matched with the projector to obtain high-quality projection effect.

[0003] However, before teaching, the projection screen and the projector need to be arranged, which takes a lot of time. Meanwhile, the projection screen and the projector are independently installed, which makes the arrangement process more troublesome and is not conducive to the carrying of the projection screen and the projector. In addition, the screen is easy to be scratched and damaged during carrying, which affects the projection quality.

[0004] Therefore, the present application is developed based on the above problems. SUMMARY

[0005] The main purpose of the present application is to provide a hidden projection screen integrated device based on digital media teaching, which is convenient for arrangement and storage, and is more convenient to operate. At the same time, it can avoid scratching the screen during carrying, and has better protection effect.

[0006] In order to achieve the above purpose, the solution of the present application is:

[0007] A hidden projection screen integrated device based on digital media teaching, comprising a base, a projector, a telescopic cylinder, a screen frame, a turnover device and a screen, the base comprises a first accommodating cavity and a second accommodating cavity, the upper end of the first accommodating cavity is provided with a rotationally connected cover plate, the projector is installed on the cover plate, the telescopic cylinder is arranged in the second accommodating cavity, the power output end of the telescopic cylinder is connected with the bottom of the screen frame, the turnover device is arranged on the screen frame, the turnover device comprises a first turnover plate, a second turnover plate and a rotating mechanism, the first turnover plate and the second turnover plate are installed on the rotating mechanism, the rotating mechanism drives the first turnover plate and the second turnover plate to rotate and separate or approach each other, one end of the screen is connected to the first turnover plate and the other end is connected to the second turnover plate.

[0008] Further, the rotating mechanism comprises a first shell, a second shell, a connecting cover, a first driving plate and a second driving plate, both sides of the connecting cover are provided with connecting plates, the side walls of the first shell and the second shell are provided with semicircular grooves which are in sliding fit with the outer sides of the connecting plates, the first driving plate is connected to the side walls on both sides of the first shell, the second driving plate is connected to the side walls on both sides of the second shell, the inner side walls of the connecting plates are provided with symmetrically arranged first rotating shafts, the ends of the first driving plate and the second driving plate which are close to each other are respectively sleeved on the first rotating shafts, the end of the first driving plate which is close to the second driving plate is provided with a first driving tooth, the end of the second driving plate which is close to the first driving plate is provided with a second driving tooth which is in mesh with the first driving tooth, the first turnover plate is installed on the first shell, and the second turnover plate is installed on the second shell.

[0009] Further, the connecting plates are further provided with guide columns, and the first driving plate and the second driving plate are provided with arc-shaped guide grooves for sliding connection of the guide columns.

[0010] Further, the bottom of the connecting cover is provided with a limiting convex strip, the upper end of the connecting plate is provided with a limiting convex block, and the first driving plate and the second driving plate are respectively provided with limiting grooves which are in abutment with both sides of the limiting convex block.

[0011] Further, the rotating mechanism further comprises a first adjusting plate and a second adjusting plate, the lower ends of the first adjusting plate and the second adjusting plate are provided with symmetrically arranged adjusting seats, the side walls of the adjusting seats are provided with second rotating shafts, the side walls of the first driving plate and the second driving plate are provided with rotating shaft holes for embedding and rotating of the second rotating shafts, and the front ends of the adjusting seats are provided with strip-shaped holes in sliding fit with the guide columns.

[0012] Further, the first adjusting plate is provided with a first clamping tooth, and the second adjusting plate is provided with a second clamping tooth which is in mesh with the first clamping tooth.

[0013] Further, the rotating mechanism further comprises an adjuster which is arranged on the left and right sides of the bottom of the first adjusting plate and the second adjusting plate, the adjuster comprises a jacking rod, a spring and a locking cover, the lower surfaces of the first adjusting plate and the second adjusting plate are provided with locking seats, the locking cover is locked on the locking seats by screws, the middle parts of the locking cover and the locking seat are in fit with a sliding hole for extension of the lower end of the jacking rod, the upper end of the jacking rod is provided with a circular jacking head and an abutment convex platform, the adjusting seat is provided with a through hole for penetration of the circular jacking head, the side wall of the abutment convex platform is in abutment with the side wall of the adjusting seat, the first driving plate and the second driving plate are provided with spherical grooves for jacking of the circular jacking head, the spring is sleeved on the lower end of the jacking rod, one end of the spring is in abutment with the side wall of the abutment convex platform, and the other end of the spring is in abutment with the side walls of the locking seat and the locking cover.

[0014] Further, the curtain frame comprises a bottom support, a telescopic rod and a handle, the lower end of the telescopic rod is installed on the bottom support, the upper end of the telescopic rod is connected with the turnover device, and the lower end of the handle is hinged with the telescopic rod.

[0015] Further, the lower end of the base and the bottom support is provided with a roller.

[0016] Further, the side wall on the two sides of the second accommodating cavity is provided with a clamping groove.

[0017] Compared with the prior art, the beneficial effects are that:

[0018] 1, when using the present application, only the cover plate is turned up, the projector is taken out of the first accommodating groove, then the telescopic cylinder drives the curtain frame to move to the designated position, the curtain frame drives the turnover device to rise through the telescopic rod, then the first turnover plate and the second turnover plate are separated by rotating each other, so that the curtain is opened and arranged, and the projector can project on the curtain. It is quick and convenient to operate, which greatly reduces the time spent on arranging the projection equipment, and further improves the teaching efficiency.

[0019] 2, when storing, only the projector is stored in the first accommodating groove by turning over the cover plate, the telescopic cylinder drives the curtain frame to be close to the bottom bracket, the turnover device drives the first turnover plate and the second turnover plate to store the curtain, and finally the telescopic rod is retracted to drive the turnover device into the clamping groove for fixation. At this time, under the action of the roller, the handle can be pulled to drag the base to be carried, so that the storage and carrying of the present application are more convenient. At the same time, the turnover device stores the curtain in the interior, which can avoid scratching the curtain during carrying, the first accommodating groove can also avoid the projector from being bumped, prevents the equipment from being damaged, further improves the service life of the present application, and greatly reduces the storage volume. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 It is another appearance structure perspective view when using the present application.

[0021] Figure 2 It is another appearance structure perspective view when using the present application.

[0022] Figure 3 It is appearance structure perspective view when storing the present application.

[0023] Figure 4 It is appearance structure perspective view when storing the present application.

[0024] Figure 5 It is connection structure schematic view of the first drive plate and the second drive plate.

[0025] Figure 6 It is Figure 5 It is a local enlarged view of area A.

[0026] Figure 7 The connection structure diagram of the connecting seat.

[0027] Figure 8 The installation structure diagram of the adjuster.

[0028] Figure 9 The cross-sectional structure diagram of the adjuster.

[0029] Figure 10 The cross-sectional structure diagram of the adjuster when the adjusting plate is turned over

[0030] In the figure:

[0031] Base 1, first accommodating cavity 11, second accommodating cavity 12, clamping groove 121, cover plate 13, projector 2, telescopic cylinder 3, curtain frame 4, bottom support 41, telescopic rod 42,

[0032] Handle 43, turning device 5, first shell 51, semicircular groove 511, second shell 52, connecting cover 53, connecting plate 531, first rotating shaft 532, guide column 533,

[0033] Limiting convex strip 534, limiting convex block 535, first driving plate 54, first driving tooth 541, arc-shaped guide groove 542, limiting groove 543, rotating shaft hole 544, spherical groove 545,

[0034] Second driving plate 55, second driving tooth 551, first adjusting plate 56, first clamping tooth 561, second adjusting plate 57, second clamping tooth 571, adjusting seat 58, strip-shaped hole 581,

[0035] Through hole 582, curtain 6, first turning plate 61, second turning plate 62, adjuster 7, top rod 71, circular top head 711, abutting convex platform 712, spring 72, locking cover 73, locking seat 74, sliding hole 75. DETAILED DESCRIPTION

[0036] In order to further explain the technical solutions of the present application, the present application will be described in detail below through specific embodiments.

[0037] As Figures 1-10As shown, a hidden projection curtain integrated device based on digital media teaching includes a base 1, a projector 2, a telescopic cylinder 3, a curtain frame 4, a turnover device 5 and a curtain 6. The inside of the base 1 is provided with a first accommodating cavity 11 and a second accommodating cavity 12. The upper end of the first accommodating cavity 11 is provided with a rotationally connected cover plate 13. The projector 2 is installed on the cover plate 13. When the cover plate 13 is turned to close the first accommodating cavity 11, the projector 2 can be stored in the first accommodating cavity 11. When the cover plate 13 is turned outward to open the first accommodating cavity 11, the projector 2 can be driven. In addition, the projector 2 can not be installed on the cover plate 13. When stored, the projector 2 is moved into the first accommodating cavity 11 for storage. When used, the projector 2 is taken out and placed on the cover plate 13. The upper surface of the cover plate 13 can be provided with a support rod. When used, the lower end of the support rod can be buckled and connected to the side wall of the base 1, thereby improving the support strength of the cover plate 13. The telescopic cylinder 3 is arranged in the second accommodating cavity 12. The power output end of the telescopic cylinder 3 penetrates through the second accommodating cavity 12 and is connected to the bottom of the curtain frame 4. By driving the telescopic cylinder 3, the curtain frame 4 can be driven to approach or move away from the base 1, so as to adjust the distance between the curtain 6 and the projector 2, thereby facilitating the picture adjustment of the projector 2 and meeting the use requirements of different occasions and different users.

[0038] In the embodiment, the curtain frame 4 includes a bottom support 41, a telescopic rod 42 and a handle 43. The lower end of the telescopic rod 42 is installed on the bottom support 41. The upper end of the telescopic rod 42 is connected to the turnover device 5. The lower end of the handle 43 is hingedly connected to the telescopic rod 42. The telescopic rod 42 can adopt a conventional telescopic rod 42 device on the market. The turnover device 5 is driven to rise or fall by the telescopic rod 42, so as to adjust the height of the curtain 6. The lower ends of the base 1 and the bottom support 41 are provided with rollers. Under the action of the rollers, the device is dragged and carried during storage, and the operation is more labor-saving. The sidewalls on both sides of the second accommodating cavity 12 are provided with clamping grooves 121. During storage, the turnover device 5 can be embedded in the clamping grooves 121 for fixation, so as to fix the turnover device 5 and avoid damage of the turnover device 5 due to violent vibration during carrying. Meanwhile, the storage volume is greatly reduced.

[0039] In the embodiment, the turnover device 5 is arranged on the upper end of the telescopic rod 42. The turnover device 5 comprises a first turnover plate 61, a second turnover plate 62 and a rotating mechanism. The first turnover plate 61 and the second turnover plate 62 are arranged on the rotating mechanism. The rotating mechanism drives the first turnover plate 61 and the second turnover plate 62 to rotate away from or close to each other. One end of the curtain 6 is connected to the first turnover plate 61 and the other end is connected to the second turnover plate 62. The rotating mechanism comprises a first housing 51, a second housing 52, a connecting cover 53, a first driving plate 54 and a second driving plate 55. The rear side of the first housing 51 is connected to the curtain frame 4. The connecting cover 53 is provided with connecting plates 531 on both sides. The connecting plates 531 are provided with circular guide surfaces on both sides. The side walls of the first housing 51 and the second housing 52 are provided with semicircular grooves 511 which are in sliding fit with the outer side surfaces of the connecting plates 531. When the curtain 6 is opened, one end of the first housing 51 and the second housing 52 can rotate around the circular guide surfaces of the connecting plates 531. The other end of the first housing 51 and the second housing 52 is provided with a lock catch. When the curtain 6 is stored, the first housing 51 and the second housing 52 can be locked together by the lock catch. The first driving plate 54 is connected to the side walls on both sides of the first housing 51. The second driving plate 55 is connected to the side walls on both sides of the second housing 52. The inner side walls of the connecting plates 531 are provided with symmetrically arranged first rotating shafts 532. The ends of the first driving plate 54 and the second driving plate 55 which are close to each other are respectively sleeved on the first rotating shafts 532. The end of the first driving plate 54 which is close to the second driving plate 55 is provided with a first driving tooth 541. The end of the second driving plate 55 which is close to the first driving plate 54 is provided with a second driving tooth 551 which is in mesh with the first driving tooth 541. The first turnover plate 61 is arranged on the first housing 51. The second turnover plate 62 is arranged on the second housing 52. In use, the second housing 52 is turned downward. The ends of the first driving plate 54 and the second driving plate 55 are respectively rotated around the first rotating shafts 532. The first turnover plate 61 and the second turnover plate 62 are separated from each other to open the curtain 6. The first driving plate 54 and the second driving plate 55 are driven by the meshing of the first driving tooth 541 and the second driving tooth 551 when rotating. The rotating precision is higher. The rotation is more synchronous and stable. The coordination of the first housing 51 and the second housing 52 when rotating is improved. The curtain 6 can be slowly and smoothly unfolded. The curtain 6 is prevented from being torn.

[0040] More preferably, the connecting plate 531 is further provided with a guide column 533, and the first driving plate 54 and the second driving plate 55 are provided with arc-shaped guide grooves 542 for sliding connection of the guide column 533. The arc-shaped guide grooves 542 can guide the first driving plate 54 and the second driving plate 55, and further improve the rotation stability of the first driving plate 54 and the second driving plate 55. Moreover, the bottom of the connecting cover 53 is provided with a limiting protrusion 534, and the bottom side walls of the first shell 51 and the second shell 52 abut against the limiting protrusion 534 when the curtain 6 is completely opened, thereby improving the support strength of the whole turnover device 5. The upper end of the connecting plate 531 is provided with a limiting protrusion 535, and the first driving plate 54 and the second driving plate 55 are respectively provided with limiting grooves 543 abutting against both sides of the limiting protrusion 535. When the curtain 6 is stored, the both sides of the limiting protrusion 535 can abut against the groove walls of the limiting grooves 543 of the first driving plate 54 and the second driving plate 55 respectively, thereby avoiding excessive abutment of the first turnover plate 61 and the second turnover plate 62, reducing the abutment pressure between the first turnover plate 61 and the second turnover plate 62, and preventing the curtain 6 from being damaged by pressure.

[0041] In the embodiment, the rotating mechanism further comprises a first adjusting plate 56 and a second adjusting plate 57, and the lower ends of the first adjusting plate 56 and the second adjusting plate 57 are respectively provided with symmetrically arranged adjusting seats 58. The side walls of the adjusting seats 58 are provided with second rotating shafts, and the side walls of the first driving plate 54 and the second driving plate 55 are provided with rotating shaft holes 544 for embedding and rotating of the second rotating shafts. The rotating shaft holes 544 are arranged outside the first rotating shaft 532, and the front ends of the adjusting seats 58 are provided with strip-shaped holes 581 slidingly matched with the guide column 533. After the above structure is adopted, as shown in FIG. 8, when the curtain 6 is stored, the middle part of the curtain 6 is concentrated and stacked at one end where the first turnover plate 61 and the second turnover plate 62 are close to each other. In order to avoid the first turnover plate 61 and the second turnover plate 62 from pressing the curtain 6 to generate creases, the first adjusting plate 56 and the second adjusting plate 57 are abutted by the curtain 6 when stored, so that the first adjusting plate 56 and the second adjusting plate 57 rotate around the second rotating shafts. The inner sides of the first adjusting plate 56 and the second adjusting plate 57 are turned to the inside of the first shell and the second shell, the spacing between the first adjusting plate 56 and the second adjusting plate 57 is increased, and thus the accommodating space is increased. At this time, the middle part of the curtain 6 can be naturally accommodated between the first adjusting plate 56 and the second adjusting plate 57, and creases are avoided. Figure 10

[0042] More preferably, the first adjusting plate 56 is provided with a first clamping tooth 561, and the second adjusting plate 57 is provided with a second clamping tooth 571 embedded with the first clamping tooth 561. The first clamping tooth 561 and the second clamping tooth 571 are matched with each other when the curtain 6 is opened to form a plane for supporting the curtain 6. When stored, the first clamping tooth 561 and the second clamping tooth 571 are rotated to be spaced from each other, so that interference is avoided, and the first adjusting plate 56 and the second adjusting plate 57 are more stably rotated. ​

[0043] In the embodiment, the rotating mechanism further comprises an adjuster 7 arranged on the left and right sides of the bottom of the first adjusting plate 56 and the second adjusting plate 57, the adjuster 7 comprises a top rod 71, a spring 72 and a locking cover 73, the bottom of the first adjusting plate 56 and the second adjusting plate 57 is provided with a locking seat 74, the locking cover 73 is locked on the locking seat 74 through a screw, the locking cover 73 and the locking seat 74 are provided with a sliding hole 75 for the lower end of the top rod 71 to extend into, the upper end of the top rod 71 is provided with a circular top head 711 and an abutting boss 712, the adjusting seat 58 is provided with a through hole 582 for the circular top head 711 to pass through, the side wall of the abutting boss 712 abuts against the side wall of the adjusting seat 58, the first driving plate 54 and the second driving plate 55 are provided with a spherical groove 545 for the circular top head 711 to top into, the spring 72 is sleeved on the lower end of the top rod 71, one end of the spring 72 abuts against the side wall of the abutting boss 712, and the other end of the spring 72 abuts against the side wall of the locking seat 74 and the locking cover 73. When the curtain 6 is opened, the through hole 582 and the spherical groove 545 are in the same axial position, at this time, the circular top head 711 is completely embedded in the spherical groove 545 for cooperation, the friction between the top rod 71 and the first driving plate 54 and the second driving plate 55 is increased, the first driving plate 54 and the second driving plate 55 are fixed, and the first driving plate 54 and the second driving plate 55 are prevented from automatically turning over. At the same time, the abutting boss 712 abuts against the adjusting seat 58 and the first driving plate 54 and the second driving plate 55, the position of the first adjusting plate 56 and the second adjusting plate 57 is fixed, and the curtain 6 has better supporting effect. When the curtain 6 is stored, the first adjusting plate 56 is subjected to external force and the abutting of the curtain 6 and starts to turn around the second rotating shaft. At this time, the axial position of the through hole 582 and the spherical groove 545 changes, the top rod 71 is displaced by the through hole 582, at this time, the circular top head 711 moves out of the spherical groove 545, thereby reducing the friction between the top rod 71 and the first driving plate 54 and the second driving plate 55, facilitating the turning over and storage of the first driving plate 54 and the second driving plate 55, and the side wall of the abutting boss 712 is also separated from the side wall of the adjusting seat 58, so that the first adjusting plate 56 and the second adjusting plate 57 can better turn over.

[0044] Compared with the prior art, the beneficial effects are that: 1, when the present application is used, only need to turn up the cover plate 13, take out the projector 2 from the first containing groove, then drive the curtain frame 4 to move to the designated position by the telescopic cylinder 3, drive the curtain frame 4 to rise by the telescopic rod 42, then the first turning plate 61 and the second turning plate 62 are separated by rotating, so that the curtain 6 is opened and arranged, and the projector 2 can project on the curtain 6. The operation is quick and convenient, which greatly reduces the time spent on arranging the projection equipment, and further improves the teaching efficiency.

[0045] When the projector 2 is stored, the cover plate 13 is turned over to store the projector 2 into the first accommodating groove, the telescopic cylinder 3 drives the curtain frame 4 to be close to the bottom bracket, the turnover device 5 drives the first turnover plate 61 and the second turnover plate 62 to store the curtain 6, and finally the telescopic rod 42 is retracted to drive the turnover device 5 into the clamping groove 121 to be fixed. At this time, under the action of the roller, the handle 43 can be pulled to drag the base 1 to be carried, so that the storage and carrying of the projector 2 are more convenient. Meanwhile, the turnover device 5 stores the curtain 6 in the interior, so that the curtain 6 can be prevented from being scratched during the carrying, the first accommodating groove can also prevent the projector 2 from being bumped, the equipment is prevented from being damaged, the service life of the projector 2 is further improved, and the storage volume is greatly reduced.

[0046] The above embodiments and drawings are not limited to the product shape and style of the present application, and any appropriate changes or modifications made by those skilled in the art should be considered as not departing from the patent scope of the present application.

Claims

1. A hidden projection screen integrated device based on digital media teaching, characterized in that, The utility model provides a projection device, including base, projector, telescopic cylinder, curtain frame, turnover device and curtain, the base includes first accommodating cavity and second accommodating cavity, the upper end of first accommodating cavity is equipped with the cover plate of rotation connection, the projector is installed on the cover plate, the telescopic cylinder is equipped in second accommodating cavity, and the power output end of telescopic cylinder is connected with the bottom of curtain frame, and the turnover device sets up on the curtain frame, and the turnover device includes first turnover board, second turnover board and rotation mechanism, and first turnover board and second turnover board are installed on rotation mechanism, and rotation mechanism drives first turnover board and second turnover board rotate and separate or close to each other, one end of curtain is connected on first turnover board and the other end is connected on second turnover board. The rotation mechanism includes first shell, second shell, connecting cover, first drive plate and second drive plate, the left and right sides of connecting cover are equipped with connecting plate, the side wall of connecting plate is equipped with two circular guide surfaces, the side wall of first shell and second shell is equipped with semicircular groove close to connecting plate one end, and the side wall of first shell and second shell on the left and right sides is slidably connected with the side wall of connecting plate, first drive plate is connected on the side wall of first shell on the left and right sides, second drive plate is connected on the side wall of second shell on the left and right sides, the inner side wall of connecting plate is equipped with the first rotation shaft of symmetrical setting, and the end of first drive plate and second drive plate close to each other is respectively sleeved on the first rotation shaft of symmetrical setting, the end of first drive plate close to second drive plate is equipped with first drive tooth, and the end of second drive plate close to first drive plate is equipped with second drive tooth meshed with first drive tooth, first turnover board is installed on first shell, and second turnover board is installed on second shell. The side of connecting plate close to first shell and second shell is equipped with the guide column of symmetrical setting, the arc-shaped guide slot for the guide column sliding connection is equipped on first drive plate and second drive plate, and the arc-shaped guide slot on first drive plate and second drive plate is slidably connected with different guide columns; The bottom of connecting cover is equipped with limiting convex strip, the upper end of connecting plate is equipped with limiting convex block, and the limiting slot for the limiting convex block on both sides is respectively equipped on first drive plate and second drive plate; The rotation mechanism further includes first adjusting plate and second adjusting plate, the lower end of first adjusting plate is equipped with the adjusting seat of symmetrical setting, the lower end of second adjusting plate is equipped with the adjusting seat of symmetrical setting, the side wall of adjusting seat is equipped with second rotation shaft, and the rotation shaft hole for the second rotation shaft embedding rotation is equipped on the side wall of first drive plate and second drive plate, the front end of adjusting seat is slidably connected with the strip-shaped hole of guide column.

2. The digital media teaching based hidden projection screen integrated device according to claim 1, wherein, First clamping tooth is equipped on the first adjusting plate, and second clamping tooth is equipped on the second adjusting plate and is embedded with first clamping tooth.

3. The integrated digital media teaching based hidden projection screen device according to claim 2, wherein, The rotating mechanism further comprises adjusters arranged on the left and right sides of the bottom of the first adjusting plate and the left and right sides of the bottom of the second adjusting plate, the adjusters comprising a top rod, a spring and a locking cover, the left and right sides of the lower surface of the first adjusting plate and the left and right sides of the lower surface of the second adjusting plate being provided with locking seats, the locking cover being locked on the locking seats by screws, the middle parts of the locking cover and the locking seats being provided with sliding holes for the lower end of the top rod to extend into, the upper end of the top rod being provided with a round head and an abutting boss, the adjusting seat being provided with a through hole for the round head to pass through, the side wall of the abutting boss abutting against the side wall of the adjusting seat, the first driving plate and the second driving plate being provided with spherical grooves for the round head to top into, the spring being sleeved on the lower end of the top rod, one end of the spring abutting against the side wall of the abutting boss, the other end of the spring abutting against the side wall of the locking seat and the locking cover.

4. The integrated digital media teaching based hidden projection screen device of claim 1, wherein, The curtain frame comprises a bottom support, a telescopic rod and a handle, the lower end of the telescopic rod being mounted on the bottom support, the upper end of the telescopic rod being connected with the turnover device, the lower end of the handle being hinged to the telescopic rod.

5. The integrated digital media teaching based hidden projection screen device according to claim 4, wherein, The lower end of the bottom support and the base is provided with a rolling wheel.

6. The digital media teaching based hidden projection screen integrated device of claim 1, wherein, The side walls on the two sides of the second accommodating cavity are provided with clamping grooves.

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