Telescopic mobile audio-video device with lifting, folding and hiding screen projector

Abstract

The utility model relates to the field of audio equipment, in particular to a telescopic mobile audio-video device with a lifting folding hidden screen and a projector, which comprises a mobile sound box, a lifting folding projection screen and the projector, the mobile sound box is provided with a hidden cavity and a storage groove, the lifting folding projection screen is arranged in the hidden cavity, a telescopic retaining frame is arranged in the storage groove, and the projector is arranged in the telescopic retaining frame. The projector is arranged on the telescopic blocking frame. According to the utility model, the projector can be telescopically positioned and hidden, so that not only can the projector be conveniently stored and protected, but also the projector can be accurately positioned, a common user can quickly obtain a good projection effect, the adjustment time can be greatly shortened, and great convenience can be brought to the use of the user; the normal projection function can be realized without the assistance of other accessories, and the projector can be used in more places; the projection is less interfered by the outside; in addition, the lifting folding projection screen is arranged on the display screen, and the lifting folding projection screen can be folded and hidden, so that a good protection effect can be achieved.

Description

Technical Field

[0001] The utility model relates to the field of audio equipment, in particular to a mobile audio-visual device. Background Art

[0002] At present, there are many mobile audio-visual devices with projection functions. In such mobile audio-visual devices, projection cloth and projector are now used to realize the projection function. Among them, the projection cloth can be folded and set on the mobile audio-visual device, and the projector is an independent electrical appliance. When the projection function is needed, first unfold the projection cloth; then place the projector at a suitable position in front of the projection cloth, and make the projection direction of the projector face the projection cloth; then turn on the projector; then adjust the projector to make the projection image quality at a high quality.

[0003] Since most users have limited experience in placing and adjusting projectors, the process of adjusting the projector generally involves: adjusting the front, back, left, right, up, and down positions, adjusting the tilt angle, adjusting the screen display area, adjusting the projection angle, adjusting the focal length, etc. This will cause the projector adjustment process to take a lot of time, which brings great inconvenience to the user. In addition, independently placed projectors generally require an auxiliary platform to support the projector, which not only requires the purchase or search for an auxiliary platform, but also limits the applicable places of mobile audio and video devices. In addition, independently placed projectors are not only prone to bumps and damage, but also prone to the projection screen being disturbed by human activities, which can easily affect the playback of related video information, which causes considerable trouble for users. At the same time, the projection cloth on the existing mobile audio and video device is also inconvenient to fold and store.

[0004] Therefore, it is necessary to design a mobile audio-visual device with a lifting, folding, hidden screen projector to solve the above-mentioned technical problems. Utility Model Content

[0005] The purpose of the utility model is to solve the above-mentioned problems and shortcomings, and to provide a mobile audio-visual device with a lifting, folding, hidden screen projector and a retractable projector. The mobile audio-visual device can realize telescopic positioning and hiding of the projector, which is not only conducive to the storage and protection of the projector, but also conducive to accurate positioning of the projector, which can help ordinary users to quickly obtain good projection effects, and can greatly shorten the adjustment time, thereby bringing great convenience to users; it can realize normal projection function without the assistance of other accessories, and can be used in more places; its projection is less affected by external interference, so that it can output video information more stably, thereby solving many problems for users; and there is a lifting, folding projection screen on it, and the lifting, folding projection screen can be folded and hidden, which can play a good protective role.

[0006] The technical solution of the utility model is achieved in this way:

[0007] A mobile audio-visual device with a retractable projector and a lifting, folding and hidden screen, characterized in that it includes a mobile speaker, a lifting and folding projection screen, and a projector. The mobile speaker is respectively provided with a hidden cavity and a storage groove. The lifting and folding projection screen is arranged in the hidden cavity so that it can be lifted in and out, and the lifting and folding projection screen can be unfolded outside the hidden cavity. A retractable blocking frame that can be retracted in and out of the storage groove and block the notch of the storage groove is arranged in the storage groove. The projector is arranged on the retractable blocking frame in the storage groove, so that the projector can enter and exit the storage groove with the retractable blocking frame, and the projector moved outside the storage groove can project images onto the unfolded lifting and folding projection screen.

[0008] Preferably, the retractable blocking frame includes a retractable driving mechanism, a sliding bracket, and a shielding cover. The retractable driving mechanism is arranged in the storage groove, and the retractable driving direction of the retractable driving mechanism faces outside the storage groove. The sliding bracket is slidably fitted in the storage groove. The projector is arranged on the sliding bracket. The shielding cover is arranged at the outer end of the sliding bracket, and the shielding cover can block the notch of the storage groove.

[0009] Preferably, the retractable driving mechanism includes a first motor, a lead screw, and a moving block. The first motor and the lead screw are both arranged in the storage groove, and the two ends of the lead screw respectively face the bottom and the notch of the storage groove, and the lead screw is drivingly connected to the first motor. The moving block is screwed on the lead screw, and the sliding bracket is fixedly connected to the moving block.

[0010] Preferably, the storage groove is opened on the front wall of the mobile speaker. The retractable blocking frame can move back and forth in and out of the storage groove, and a touch screen is arranged on the front wall of the retractable blocking frame.

[0011] Preferably, the hidden cavity is opened on the top surface of the mobile speaker. The lifting and folding projection screen includes a lifting driving mechanism and a folding projection screen. The lifting driving mechanism is arranged in the hidden cavity. The folding projection screen is arranged at the lifting end of the lifting driving mechanism, so that the folding projection screen can enter the hidden cavity with the lifting driving mechanism after being folded, and the folding projection screen can be unfolded outside the hidden cavity, and the projector can project images onto the folding projection screen.

[0012] Preferably, the lifting driving mechanism includes a telescopic slide rail and an electric telescopic push rod. The telescopic slide rail and the electric telescopic push rod are both vertically arranged in the hidden cavity. The folding projection screen is simultaneously connected to the telescopic end of the telescopic slide rail and the telescopic end of the electric telescopic push rod.

[0013] Preferably, the folding projection screen comprises a main projection screen, at least one auxiliary projection screen, and at least one folding drive mechanism. The main projection screen is arranged on the lifting end of the lifting drive mechanism, the folding drive mechanism is arranged on the main projection screen, the auxiliary projection screen is hinged on the main projection screen, and the auxiliary projection screen is driven and connected to the folding drive mechanism, and the auxiliary projection screen can be flipped and attached to the main projection screen under the drive of the folding drive mechanism.

[0014] Preferably, there are two auxiliary projection screens, which are respectively hinged on the left and right ends of the main projection screen, and can be flipped forward horizontally and attached to the front wall of the main projection screen.

[0015] Preferably, the folding drive mechanism includes a second motor, a gearbox, a driving turntable, and a driving shaft. The second motor and / or the gearbox are arranged on the main projection screen, and the gearbox is drivingly connected to the second motor. The driving turntable is mounted on the power output shaft of the gearbox, and the rotation center of the driving turntable is coaxial with the flipping center line of the auxiliary projection screen. One end of the driving shaft is connected to the end face of the driving turntable, and the axial center line of the driving shaft is staggered with the rotation center line of the driving turntable. The driving shaft can be relatively rotatably inserted into the auxiliary projection screen.

[0016] Preferably, a shielding cover which can be flipped open outwards is provided on the cavity opening of the hidden cavity.

[0017] The beneficial effects of the utility model are as follows: on the mobile audio-visual device, the projector is positioned in the storage slot by using a telescopic bracket, and the telescopic bracket can cover the notch of the storage slot, which can achieve the purpose of telescopic positioning and hiding the projector, which is not only conducive to storing and protecting the projector, but also conducive to accurately positioning the projector, which can help ordinary users quickly obtain good projection effects, which can greatly shorten the adjustment time, thereby bringing great convenience to the user. And it can realize the normal projection function without the assistance of other accessories, and it can be used in more places; its projection is less affected by external interference, so it can output video information more stably, thereby solving many problems for users.

[0018] At the same time, there is a hidden cavity on the mobile speaker, and the lifting and folding projection screen is arranged in the hidden cavity so as to be able to be lifted in and out, and the lifting and folding projection screen can be unfolded outside the hidden cavity, which can not only meet normal projection needs, but also can fold the lifting and folding projection screen and hide it in the hidden cavity, which can help to shield and protect the lifting and folding projection screen, and can facilitate the storage of the lifting and folding projection screen and the projector through the mobile speaker of small volume, thereby saving installation space and improving the convenience of use and management. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1One of the structural schematic diagrams of the mobile audio-visual device in the retracted state of the present utility model.

[0020] Figure 2 Another structural schematic diagram of the mobile audio-visual device in the retracted state of the present utility model.

[0021] Figure 3 Structural schematic diagram of the lifting and folding projection screen in the extended state of the present utility model.

[0022] Figure 4 One of the structural schematic diagrams of the lifting and folding projection screen in the unfolded state of the present utility model.

[0023] Figure 5 Another structural schematic diagram of the lifting and folding projection screen in the unfolded state of the present utility model.

[0024] Figure 6 Three-dimensional structural schematic diagram of the mobile speaker of the present utility model.

[0025] Figure 7 Structural schematic diagram of the assembled state of the projector and the telescopic retaining frame of the present utility model.

[0026] Figure 8 Structural schematic diagram of the assembled state of the sliding bracket and the shielding cover of the present utility model.

[0027] Figure 9 One of the three-dimensional structural schematic diagrams of the telescopic drive mechanism of the present utility model.

[0028] Figure 10 Another three-dimensional structural schematic diagram of the telescopic drive mechanism of the present utility model.

[0029] Figure 11 Three-dimensional structural schematic diagram of the lifting and folding projection screen of the present utility model.

[0030] Figure 12 Three-dimensional structural schematic diagram of the folding projection screen of the present utility model.

[0031] Figure 13 Three-dimensional structural schematic diagram of the folding drive mechanism of the present utility model. Detailed implementation manners

[0032] As Figures 1 to 6As shown in the figure, a mobile audio-visual device with a retractable projector for a lifting, folding and hidden screen of the present utility model includes a mobile speaker 1, a lifting and folding projection screen 2, and a projector 3. Among them, a hidden cavity 11 and a storage groove 12 are respectively formed on the mobile speaker 1. The lifting and folding projection screen 2 is arranged in the hidden cavity 11 so that it can move up and down in and out, and the lifting and folding projection screen 2 can be unfolded outside the hidden cavity 11. A retractable blocking frame 4 that can retract in and out of the storage groove 12 and block the notch of the storage groove 12 is arranged in the storage groove 12. The projector 3 is arranged on the retractable blocking frame 4 in the storage groove 12, so that the projector 3 can enter and exit the storage groove 12 along with the retractable blocking frame 4, and the projector 3 moved outside the storage groove 12 can project an image onto the unfolded lifting and folding projection screen 2.

[0033] On this mobile audio-visual device, the projector 3 is positioned in the storage groove 12 by using the retractable blocking frame 4, and the retractable blocking frame 4 can block the notch of the storage groove 12. This can achieve the purpose of retractable positioning and hiding the projector 3. This not only facilitates the storage and protection of the projector, but also facilitates the accurate positioning of the projector 3, which is beneficial for ordinary users to quickly obtain a good projection effect, and it can greatly shorten the adjustment time, thus bringing great convenience to the user's use. And it can achieve normal projection function without the assistance of other accessories, and it can be used in more places; its projection is less interfered by the outside world, so it can output video information more stably, thus solving many troubles for the user.

[0034] At the same time, there is a hidden cavity 11 on the mobile speaker 1, and the lifting and folding projection screen 2 is arranged in the hidden cavity 11 so that it can move up and down in and out. Moreover, the lifting and folding projection screen 2 can be unfolded outside the hidden cavity 11. This can not only meet the normal projection requirements, but also fold and hide the lifting and folding projection screen 2 in the hidden cavity 11, which is beneficial for shielding and protecting the lifting and folding projection screen 2, and it is beneficial to store the lifting and folding projection screen 2 and the projector 3 through the mobile speaker 1 with a smaller volume, thus facilitating the saving of installation space and improving the convenience of use and management.

[0035] Such as Figure 3 、 Figure 4 and Figure 7As shown, the telescopic shielding frame 4 includes a telescopic driving mechanism 41, a sliding bracket 42, and a shielding cover 43. The telescopic driving mechanism 41 is arranged in the storage groove 12, and the telescopic driving direction of the telescopic driving mechanism 41 faces outside the storage groove 12. The sliding bracket 42 is slidably inserted into the storage groove 12. The projector 3 is fixedly arranged on the sliding bracket 42. The shielding cover 43 is arranged at the outer end of the sliding bracket 42, and the shielding cover 43 can shield the notch of the storage groove 12. Such a telescopic shielding frame 4 is very stable and reliable, which can not only automatically control the telescoping, but also greatly improve the accuracy and stability of the projector 3 entering and exiting, thus contributing to further improving the convenience and reliability of use.

[0036] The projector 3 can be fixed on the sliding bracket 42 by a plurality of screws (not shown in the figure). The threaded ends of the screws pass through the bottom of the sliding bracket 42 from the bottom of the sliding bracket 42 and are locked on the bottom of the projector 3. When the sliding bracket 42 slides outside the storage groove 12, the screws are also outside the storage groove 12. This can not only ensure that the installation and positioning of the projector 3 are very stable and reliable, but also facilitate meeting the disassembly and maintenance requirements of the projector 3.

[0037] As Figure 6 、 Figure 7 、 Figure 9 and Figure 10 shown, the telescopic driving mechanism 41 includes a first motor 411, a lead screw 412, and a moving block 413. The first motor 411 and the lead screw 412 are both arranged in the storage groove 12, and the two ends of the lead screw 412 face the bottom and the notch of the storage groove 12 respectively, and the lead screw 412 is drivingly connected to the first motor 411. The moving block 413 is screwed on the lead screw 412, and the sliding bracket 42 is fixedly connected to the moving block 413. Such a telescopic driving mechanism 41 can greatly improve the accuracy and stability of the sliding bracket 42 telescoping in and out of the storage groove 12, thereby facilitating improving the accuracy and reliability of positioning. During use, the relative position between the projector 3 and the lifting and folding projection screen 2 is stable, so the projected image will also be very stable, thus facilitating the realization of high-quality video output.

[0038] As Figure 9 and Figure 10 shown, the lead screw 412 is drivingly connected to the first motor 411 through a reduction box 414, which can make the power output by the first motor 411 drive the lead screw 412 to rotate more stably and accurately.

[0039] As Figure 3 and Figure 4As shown, the storage slot 12 is opened on the front wall of the mobile speaker 1. The telescopic baffle 4 can move back and forth in and out of the storage slot 12. A touch screen 5 is arranged on the front wall of the telescopic baffle 4. In this way, when the telescopic baffle 4 moves forward, the distance between the projector 3 and the lifting and folding projection screen 2 can be accurately maintained within a very reasonable range. This eliminates the need to make the mobile speaker 1 too thick to meet the usage requirements for the distance between the projector 3 and the lifting and folding projection screen 2, thus facilitating the manufacture of a smaller-sized mobile speaker 1, and further facilitating the manufacture of a small-sized mobile audio-visual device, which is conducive to further improving the convenience of user use and management. By arranging the touch screen 5 on the front wall of the telescopic baffle 4, when the telescopic baffle 4 extends out of the storage slot 12 and protrudes from the front wall of the mobile speaker 1 to put the projector 3 into the projection state, the operation of the touch screen 5 is not hindered by the telescopic baffle 4. Coupled with the fact that the touch screen 5 itself is also convenient for users to operate, this can greatly improve the convenience of user use.

[0040] During actual use, the touch screen 5 can provide functions such as song selection, switching on and off the telescopic drive mechanism 41, switching on and off the lifting and folding projection screen 2, and switching on and off the projector 3, thus meeting the actual usage requirements.

[0041] As Figure 4 , Figures 6 to 8 As shown, the sliding bracket 42 includes a supporting plate 421 and two side plates 422. The two side plates 422 are vertically arranged on the left and right top edges of the supporting plate 421. The rear wall of the shielding cover 43 is connected to the front end of the supporting plate 421 and the front ends of the two side plates 422. The left surface of the left side plate 422 and the right surface of the right side plate 422 are respectively connected to the left and right groove walls of the storage slot 12 through slide rails 44 applied to drawers. The projector 3 is arranged on the top surface of the supporting plate 421. The moving block 413 is fixed to the bottom surface of the supporting plate 421 by a number of screws. The touch screen 5 is arranged on the front wall of the shielding cover 43. Such a sliding bracket 42 is very simple and reliable, and the above-mentioned assembly not only facilitates manufacturing but also ensures that the sliding of the sliding bracket 42 is very accurate and stable.

[0042] As Figure 6 , Figure 7 , Figure 9 And Figure 10As shown, a first optoelectronic partition 415 is provided on the side wall of the moving block 413, and two first optoelectronic switches 416 are provided in the receiving groove 12. The two first optoelectronic switches 416 are arranged side by side in the front and back, and the two first optoelectronic switches 416 are located in the front and back directions of the first optoelectronic partition 415 moving with the moving block 413, and the first optoelectronic partition 415 can act on the two first optoelectronic switches 416. This can be used to position the front and back positions of the sliding bracket 42 moving, so as to facilitate accurately positioning the extending position and the retracting position of the sliding bracket 42, and further facilitate accurately positioning the projector 3, which helps to further improve the reliability of the mobile audio-visual device.

[0043] As Figure 4 shown Figure 8 As shown, a mounting groove 431 is formed on the front wall of the shielding cover 43, and at least one wire passing hole 432 penetrating through to the receiving groove 12 is formed at the bottom of the mounting groove 431. The touch screen 5 is mounted in the mounting groove 431. This can not only accurately position the touch screen 5, but also facilitate the touch screen 5 to obtain electric energy.

[0044] As Figure 4 shown Figure 6 As shown, an inclined surface 13 inclined backward is formed on the front top edge of the mobile speaker 1, and the receiving groove 12 is formed in the middle of the inclined surface 13. This can reduce the obstruction of the front top edge of the mobile speaker 1 to the projection of the projector 3, so that it is not necessary to make the sliding bracket 42 slide outwards too much. This can not only reduce the space occupied in the use state, but also facilitate better positioning of the sliding bracket 42, so that the sliding bracket 42 can better support the projector 3.

[0045] As Figure 4 shown, the front walls of the shielding cover 43 and the touch screen 5 are both inclined backward. This can not only make the front structure very coordinated, but also facilitate the user to observe and operate the touch screen 5, thus facilitating improving the convenience of use.

[0046] The projector 3 is a short-throw projector. In this way, it is not necessary to make the mobile audio-visual device too large to meet the projection requirements of the projector 3, so as to facilitate manufacturing a small-sized mobile audio-visual device, which can facilitate packaging, storage and transportation.

[0047] The projector 3 can also adopt an ultra-short-throw projector, which can facilitate manufacturing a smaller-sized mobile audio-visual device, thus further improving the convenience of packaging, storage and transportation.

[0048] As Figures 1 to 6 , Figure 11As shown, the hidden cavity 11 is opened on the top surface of the mobile speaker 1. The lifting and folding projection screen 2 includes a lifting drive mechanism 21 and a folding projection screen 22. The lifting drive mechanism 21 is arranged in the hidden cavity 11, and the folding projection screen 22 is arranged at the lifting end of the lifting drive mechanism 21, so that after the folding projection screen 22 is folded, it can enter the hidden cavity 11 along with the lifting drive mechanism 21, and the folding projection screen 22 can be unfolded outside the hidden cavity 11, and the projector 3 can project images onto the folding projection screen 22. In this way, the requirement of automatic lifting can be achieved, which is beneficial to improving the accuracy, stability and convenience of the lifting action, and further contributes to improving the reliability and applicability of the mobile audio-visual device.

[0049] As Figure 5 , Figure 6 and Figure 11 shown, the lifting drive mechanism 21 includes a telescopic slide rail 211 and an electric telescopic push rod 212. The telescopic slide rail 211 and the electric telescopic push rod 212 are both vertically arranged in the hidden cavity 11, and the folding projection screen 22 is simultaneously connected to the telescopic end of the telescopic slide rail 211 and the telescopic end of the electric telescopic push rod 212. Such a lifting drive mechanism 21 is beneficial to accurately and stably push the folding projection screen 22 to perform reciprocating lifting motion, thereby being beneficial to improving the accuracy and stability of the vertical movement of the folding projection screen 22.

[0050] As Figure 11 shown, the telescopic slide rail 211 can directly adopt the telescopic slide rail applied to the drawer, so that the functions of stable positioning and guiding can be satisfied, and thus the requirements of actual manufacturing and use can be met.

[0051] As Figure 6 and Figure 11 shown, two second photoelectric switches 111 are arranged in the hidden cavity 11, and the two second photoelectric switches 111 are arranged side by side vertically. A second photoelectric partition 112 that can move up and down along with it is arranged on the telescopic end of the electric telescopic push rod 212 or the telescopic end of the telescopic slide rail 211, and the second photoelectric partition 112 can act on the two second photoelectric switches 111 during the up and down movement. This is beneficial to accurately positioning the height position of the folding projection screen 22, so as to achieve the purpose of accurately positioning the hidden position and the unfolded position of the folding projection screen 22, and further contributes to improving the reliability of the mobile audio-visual device.

[0052] As Figures 3 to 5 , Figure 11 and Figure 12As shown, the folding projection screen 22 includes a main projection screen 23, at least one sub-projection screen 24, and at least one folding drive mechanism 25. The main projection screen 23 is disposed on the lifting end of the lifting drive mechanism 21. The folding drive mechanism 25 is disposed on the main projection screen 23. The sub-projection screen 24 is hinged to the main projection screen 23, and the sub-projection screen 24 is drivingly connected to the folding drive mechanism 25, and the sub-projection screen 24 can be turned over and attached to the main projection screen 23 under the drive of the folding drive mechanism 25. In this way, the folding projection screen 22 can be folded automatically and stably, which not only improves the convenience of folding, but also improves the accuracy and reliability of folding.

[0053] As Figure 11 shown, the number of the folding drive mechanisms 25 is equal to the number of the sub-projection screens 24, and each sub-projection screen 24 is driven by a folding drive mechanism 25 respectively, so as to meet the folding requirements of multiple sub-projection screens 24. Figure 12 As

[0054] shown, there are two sub-projection screens 24, and the two sub-projection screens 24 are respectively hinged to the left and right ends of the main projection screen 23, and the two sub-projection screens 24 can be turned forward horizontally and attached to the front wall of the main projection screen 23. This not only enables the folding projection screen 22 to have a simple structure, but also enables the folding projection screen 22 to have a larger screen effect, so as to facilitate providing a larger picture, and further helps to improve the applicability of the mobile audio-visual device. Figures 3 to 5 、 Figure 11 shown, the sub-projection screen 24 and the main projection screen 23 are hinged together by two three-dimensional invisible hinges 26, and the two three-dimensional invisible hinges 26 are arranged side by side up and down. This not only enables the side edges of the sub-projection screen 24 to be closely attached to the side edges of the main projection screen 23, but also meets the requirements of 180-degree folding and unfolding, so as to facilitate improving the reliability and stability of the folding of the folding projection screen 22. Figure 12 As

[0055] shown, the sub-projection screen 24 and the main projection screen 23 are hinged together by two three-dimensional invisible hinges 26, and the two three-dimensional invisible hinges 26 are arranged side by side up and down. This not only enables the side edges of the sub-projection screen 24 to be closely attached to the side edges of the main projection screen 23, but also meets the requirements of 180-degree folding and unfolding, so as to facilitate improving the reliability and stability of the folding of the folding projection screen 22. Figure 3 shown, the sub-projection screen 24 and the main projection screen 23 are hinged together by two three-dimensional invisible hinges 26, and the two three-dimensional invisible hinges 26 are arranged side by side up and down. This not only enables the side edges of the sub-projection screen 24 to be closely attached to the side edges of the main projection screen 23, but also meets the requirements of 180-degree folding and unfolding, so as to facilitate improving the reliability and stability of the folding of the folding projection screen 22. Figure 12 As

[0056] shown, the sub-projection screen 24 and the main projection screen 23 are hinged together by two three-dimensional invisible hinges 26, and the two three-dimensional invisible hinges 26 are arranged side by side up and down. This not only enables the side edges of the sub-projection screen 24 to be closely attached to the side edges of the main projection screen 23, but also meets the requirements of 180-degree folding and unfolding, so as to facilitate improving the reliability and stability of the folding of the folding projection screen 22. Figure 11 shown, the sub-projection screen 24 and the main projection screen 23 are hinged together by two three-dimensional invisible hinges 26, and the two three-dimensional invisible hinges 26 are arranged side by side up and down. This not only enables the side edges of the sub-projection screen 24 to be closely attached to the side edges of the main projection screen 23, but also meets the requirements of 180-degree folding and unfolding, so as to facilitate improving the reliability and stability of the folding of the folding projection screen 22. Figure 13As shown, the folding drive mechanism 25 includes a second motor 251, a gearbox 252, a driving turntable 253, and a driving shaft 254. The second motor 251 or / and the gearbox 252 are arranged on the main projection screen 23, and the gearbox 252 is drivingly connected to the second motor 251. The driving turntable 253 is sleeved on the power output shaft of the gearbox 252, and the rotation center of the driving turntable 253 is coaxial with the flip center line of the auxiliary projection screen 24. One end of the driving shaft 254 is connected to the end face of the driving turntable 253, and the axial center line of the driving shaft 254 is arranged to be staggered from the rotation center line of the driving turntable 253. The driving shaft 254 can be relatively rotatably inserted on the auxiliary projection screen 24. Such a folding drive mechanism 25 is very stable and reliable, which can greatly improve the accuracy and stability of flipping the auxiliary projection screen 24.

[0057] like Figure 13 As shown, the main projection screen 23 or the second motor 251 or the gearbox 252 is provided with a photoelectric limit sensor 255 for sensing the rotation angle of the driving turntable 253. This can help to accurately locate the rotation angle of the driving turntable 253, thereby facilitating the purpose of accurately flipping the auxiliary projection screen 24.

[0058] like Figure 11 and Figure 12 As shown, the main projection screen 23 includes a main aluminum frame 231, a main projection board 232 or a projection cloth, and the main projection board 232 or the projection cloth is arranged on the main aluminum frame 231; the auxiliary projection screen 24 includes an auxiliary aluminum frame 241, an auxiliary projection board 242 or an auxiliary projection cloth, and the auxiliary projection board 242 or the auxiliary projection cloth is arranged on the auxiliary aluminum frame 241; and the components connected to the main projection screen 23 and the auxiliary projection screen 24 are connected to the corresponding aluminum frames. In this way, the main projection screen 23 and the auxiliary projection screen 24 can have a light and reliable structure, which can be conducive to the stability of movement.

[0059] like Figures 1 to 3 , Figure 5 As shown, a shielding cover 14 that can be turned outward and opened is provided on the cavity opening of the hidden cavity 11. This can provide a better protection for the lifting and folding projection screen 2 folded in the hidden cavity 11.

[0060] like Figures 1 to 5As shown, the hidden cavity 11 is opened at the rear end of the top surface of the mobile speaker 1. The shielding cover 14 is hinged to the rear cavity opening of the hidden cavity 11 through two hinges arranged side by side left and right, and the shielding cover 14 can be flipped open backward and upward; when the folding projection screen 22 moves upward, it can push open the shielding cover 14; the shielding cover 14 can also be manually opened; after the shielding cover 14 is opened, it abuts against the rear wall of the folding projection screen 22. When the folding projection screen 22 is retracted into the hidden cavity 11, the shielding cover 14 closes by its own gravity; in this way, the requirement of automatically opening and closing the shielding cover 14 can be achieved, which helps to improve the convenience of use.

[0061] At least one tension spring (not shown in the figure) is connected between the inner wall of the shielding cover 14 and the inner wall of the hidden cavity 11. When the shielding cover 14 is opened, the tension spring accumulates tension; when the folding projection screen 22 is retracted into the hidden cavity 11, the shielding cover 14 is driven to close by the tension of the tension spring, which helps to achieve a more reliable closing effect; and after closing, the tension spring is hidden in the hidden cavity 11, which can ensure that the quality of the mobile audio-visual device is not affected.

[0062] There are two tension springs. The two tension springs are arranged in a V-shaped relationship in the hidden cavity 11, and the lower ends of the two tension springs are connected to the rear cavity wall of the hidden cavity 11, and the upper ends of the two tension springs are connected to the inner wall of the shielding cover 14. This can not only prevent the tension spring from affecting the lifting of the folding projection screen 22, but also make the closing of the shielding cover 14 more stable.

[0063] As Figure 6 shown, mixing consoles 15 are respectively arranged at the left and right ends of the inclined surface 13. This can facilitate the mixing operation, which helps to improve the convenience of use.

[0064] As Figure 6 shown, at least one charging port 16 for charging the microphone is arranged on the top surface of the mobile speaker 1. This can facilitate meeting more usage requirements, which helps to improve the applicability of the mobile audio-visual device.

[0065] As Figure 6 shown, a plurality of universal wheels 17 are arranged on the bottom surface of the mobile speaker 1, and at least one universal wheel 17 is a universal wheel with a brake. This can not only improve the convenience of movement, but also ensure the stability of placement.

[0066] As Figure 6 shown, groove-type handle parts 18 with a narrow groove opening and a wide groove interior are respectively opened on the left and right surfaces of the mobile speaker 1. This can not only facilitate movement, but also prevent the handle from occupying external space, which helps to reduce scratching.

[0067] As Figure 6As shown, at least one speaker 19 is provided on the mobile speaker 1, and each speaker 19 is arranged on the front wall of the mobile speaker 1. The cavity where each speaker 19 is installed is separated from the hidden cavity 11 and the storage cavity 12 by partitions. This is beneficial for obtaining good sound effects.

[0068] As Figure 6 shown, a convex mouth portion 10 is formed by protruding upward from the cavity opening of the hidden cavity 11. This can increase the hidden space of the hidden cavity 11 without increasing the volume of the mobile speaker 1 significantly, thereby facilitating the configuration of a folding projection screen 22 with a large height, and further facilitating the achievement of better usage effects.

[0069] As Figure 6 shown, the front wall of the convex mouth portion 10 is a backward-inclined surface 101. Identification information (such as company name, trademark, product introduction, etc.) can be set on the backward-inclined surface 101, and a backward-inclined display screen can also be set on the backward-inclined surface 101, so as to meet more usage requirements.

[0070] As Figure 2 and Figure 5 shown, a maintenance opening 20 penetrating through to the hidden cavity 11 is provided on the rear wall of the mobile speaker 1, and a cover plate 201 that can be opened (realizing the opening requirement by fixing with screws or by using hinges and locks) is installed on the maintenance opening 20. This facilitates the maintenance of the folding projection screen 22 and the lifting drive mechanism 21, which helps improve the convenience of maintenance.

[0071] A battery is provided in the mobile speaker 1. In this way, this mobile audio-visual device can be used in places where it is difficult to obtain commercial power, which helps to expand the applicable range of this mobile audio-visual device.

[0072] The above embodiments are the preferred embodiments of the present invention. All structures similar to the present invention and equivalent changes made shall fall within the protection scope of the present invention.

Claims

1. A mobile audio-visual device with a lifting, folding, hidden screen and telescopic projector, characterized in that: The invention comprises a mobile sound box (1), a lifting and folding projection screen (2), and a projector (3), wherein the mobile sound box (1) is provided with a hidden cavity (11) and a storage groove (12), the lifting and folding projection screen (2) is arranged in the hidden cavity (11) so as to be able to be lifted and moved in and out, and the lifting and folding projection screen (2) can be unfolded outside the hidden cavity (11), the storage groove (12) is provided with a telescopic blocking frame (4) which can be telescopically moved in and out of the storage groove (12) and can cover the notch of the storage groove (12), the projector (3) is arranged on the telescopic blocking frame (4) in the storage groove (12), and the projector (3) can move in and out of the storage groove (12) along with the telescopic blocking frame (4), and the projector (3) moved outside the storage groove (12) can project an image onto the unfolded lifting and folding projection screen (2).

2. The mobile audio-visual device with a lifting, folding, hidden screen and telescopic projector according to claim 1, characterized in that: The telescopic blocking frame (4) comprises a telescopic driving mechanism (41), a sliding bracket (42), and a shielding cover (43); the telescopic driving mechanism (41) is arranged in the storage slot (12), and the telescopic driving direction of the telescopic driving mechanism (41) is directed toward the outside of the storage slot (12); the sliding bracket (42) is embedded in the storage slot (12) in a manner that it can slide in and out; the projector (3) is arranged on the sliding bracket (42); the shielding cover (43) is arranged on the outer end of the sliding bracket (42), and the shielding cover (43) can shield the notch of the storage slot (12).

3. The mobile audio-visual device with a lifting, folding, hidden screen and telescopic projector according to claim 2, characterized in that: The telescopic driving mechanism (41) comprises a first motor (411), a screw rod (412), and a moving block (413); the first motor (411) and the screw rod (412) are both arranged in the storage groove (12), and the two ends of the screw rod (412) are respectively oriented toward the groove bottom and the groove opening of the storage groove (12); the screw rod (412) is also driven and connected to the first motor (411); the moving block (413) is screwed onto the screw rod (412); and the sliding bracket (42) is fixedly connected to the moving block (413).

4. The mobile audio-visual device with a lifting, folding, hidden screen and telescopic projector according to claim 1, characterized in that: The storage slot (12) is provided on the front wall of the mobile speaker (1); the telescopic retaining frame (4) can move forward and backward into and out of the storage slot (12); and a touch screen (5) is provided on the front wall of the telescopic retaining frame (4).

5. The mobile audio-visual device with a lifting, folding, hidden screen and telescopic projector according to claim 1, characterized in that: The hidden cavity (11) is opened on the top surface of the mobile sound box (1); the lifting and folding projection screen (2) comprises a lifting and folding drive mechanism (21) and a folding projection screen (22); the lifting and folding drive mechanism (21) is arranged in the hidden cavity (11); the folding projection screen (22) is arranged on the lifting end of the lifting and folding drive mechanism (21); the folding projection screen (22) can enter the hidden cavity (11) along with the lifting and folding drive mechanism (21) after being folded; the folding projection screen (22) can also be unfolded outside the hidden cavity (11); and the projector (3) can project an image onto the folding projection screen (22).

6. The mobile audio-visual device with a lifting, folding, hidden screen and telescopic projector according to claim 5, characterized in that: The lifting drive mechanism (21) comprises a telescopic slide rail (211) and an electric telescopic push rod (212); the telescopic slide rail (211) and the electric telescopic push rod (212) are both vertically arranged in the hidden cavity (11); and the folding projection screen (22) is connected to the telescopic end of the telescopic slide rail (211) and the telescopic end of the electric telescopic push rod (212) at the same time.

7. The mobile audio-visual device with a lifting, folding, hidden screen and telescopic projector according to claim 5, characterized in that: The folding projection screen (22) comprises a main projection screen (23), at least one auxiliary projection screen (24), and at least one folding drive mechanism (25); the main projection screen (23) is arranged on the lifting end of the lifting drive mechanism (21); the folding drive mechanism (25) is arranged on the main projection screen (23); the auxiliary projection screen (24) is hinged on the main projection screen (23), and the auxiliary projection screen (24) is driven and connected to the folding drive mechanism (25); and the auxiliary projection screen (24) can be turned over and attached to the main projection screen (23) under the drive of the folding drive mechanism (25).

8. The mobile audio-visual device with a lifting, folding, hidden screen and telescopic projector according to claim 7, characterized in that: There are two auxiliary projection screens (24), which are respectively hinged on the left and right ends of the main projection screen (23), and can be turned forward horizontally and attached to the front wall of the main projection screen (23).

9. The mobile audio-visual device with a lifting, folding, hidden screen and telescopic projector according to claim 7, characterized in that: The folding drive mechanism (25) comprises a second motor (251), a gearbox (252), a driving turntable (253), and a driving shaft (254); the second motor (251) or / and the gearbox (252) are arranged on the main projection screen (23), and the gearbox (252) is drivingly connected to the second motor (251); the driving turntable (253) is sleeved on the power output shaft of the gearbox (252), and the rotation center of the driving turntable (253) is coaxial with the turning center line of the auxiliary projection screen (24); one end of the driving shaft (254) is connected to the end surface of the driving turntable (253), and the axial center line of the driving shaft (254) is arranged to be staggered from the rotation center line of the driving turntable (253); and the driving shaft (254) is relatively rotatably inserted into the auxiliary projection screen (24).

10. The mobile audio-visual device with a lifting, folding, hidden screen and telescopic projector according to claim 1, characterized in that: The cavity opening of the hidden cavity (11) is provided with a shielding cover (14) which can be flipped outwards and opened.

Images