Portable multimedia presentation equipment

Abstract

The present invention discloses a portable multimedia presentation device, belonging to the technical field of educational equipment, comprising a mobile box, a receiving plate for placing a projector, a lifting drive provided on the lower side of the receiving plate, a plurality of limit slots provided on the receiving plate, and a protective assembly provided on the receiving plate. The protective assembly comprises a plurality of protective plates and a driving mechanism, the protective plates being slidably connected to the limit slots, and the driving mechanism being used to drive the protective plates on both sides to move in opposite directions along the limit slots. The mobile box also comprises a stabilizing assembly, the active mechanism of which can drive a rotating rod to rotate around its axis under the transmission of a transmission mechanism, so as to achieve the pressing of the pressure plate against the top of the projector. The technical solution of the present application, by providing a protective plate and a driving mechanism, utilizes the protective plate to protect the projector, so that the projector can be effectively protected during use by the staff, and the projector can be prevented from being damaged and affecting the normal progress of the lecture and teaching.

Description

Technical Field

[0001] The present invention relates to the technical field of educational equipment, and more particularly to portable multimedia presentation equipment. Background Art

[0002] Multimedia lectures often require projection equipment. During touring lectures, the on-site conditions may not necessarily have projection equipment, especially in outdoor situations. In this case, portable projection equipment is needed to improve the teaching conditions and content.

[0003] Patent document CN113827015A discloses a portable multimedia presentation device for a smart education system. This device utilizes a drawer structure formed between a storage box and the device housing via slide rails, facilitating its opening and closing. This facilitates the storage of small items or equipment, providing convenience for the user. While this device offers numerous advantages, it still suffers from the following issues: After the projector is stored within the device housing, it is protected only by a protective pad. This provides poor protection, leaving the projector unprotected during movement and use. This can easily damage the projector, disrupting the normal conduct of the lecture. Furthermore, lecture tours inevitably involve rushed schedules, and mistakes can often occur. For example, forgetting to turn off the power when storing the projector causes it to continue consuming power even when not in use. This can affect the performance or progress of the next lecture, especially when powered by batteries. Therefore, a portable multimedia presentation device is proposed. Summary of the Invention

[0004] 1. Technical problems to be solved

[0005] The purpose of the present invention is to provide a portable multimedia presentation device that can effectively protect the projector during the process of carrying the device, so that the projector can be in a stable state, and automatically power off when the projector is stored, so as to solve the problems raised in the above-mentioned background technology.

[0006] 2. Technical solution

[0007] The movable frame is provided with a lifting mechanism, and the lifting mechanism can drive the lifting mechanism to move the lifting mechanism upward and downward, and the lifting mechanism is provided with a lifting mechanism.

[0008] As an optional solution to the technical solution of the present application document, the driving mechanism includes a first electric push rod provided on one of the protective plates and a fixed shaft restricted by the receiving plate and rotatably connected thereto, a connecting gear is sleeved on the fixed shaft for power supply, the output end of the first electric push rod is connected and fixed to the protective plate on the other side, and two racks are meshed and connected on both sides of the connecting gear, and the racks are connected and fixed to the corresponding protective plate.

[0009] As an optional solution to the technical solution of this application document, the protective plate is densely covered with multiple rotating frames, and a connecting rod is provided on the rotating frame. The end of the connecting rod is restricted by the rotating frame and is slidably connected to it. A roller is rotatably connected to the connecting rod, and the connecting rod is provided with a spring that is connected and fixed to the rotating frame.

[0010] As an optional solution to the technical solution of this application document, the protective component also includes a plurality of adjustment mechanisms provided on the receiving plate, and the adjustment mechanism includes a gasket provided on the upper side of the receiving plate and a lifting mechanism, and the lifting mechanism is used to drive the gasket to move up and down.

[0011] As an optional solution to the technical solution of this application document, the lifting mechanism includes several screw sleeves embedded in the supporting plate, the inner thread of the screw sleeve is connected to a screw rod, the upper end of the screw rod is connected and fixed to a gasket, and the gasket is in pressure contact with the bottom of the projector.

[0012] As an optional solution to the technical solution of this application document, the lifting drive includes a second electric push rod arranged in the mobile box body, and the output end of the second electric push rod is connected to a connecting plate fixedly connected to the receiving plate. A plurality of fixed sleeves are also provided in the mobile box body, and the inner wall of the fixed sleeve is slidably connected to a guide rod fixedly connected to the receiving plate.

[0013] As an optional solution to the technical solution of this application document, the active mechanism includes several active rods restricted by the inner wall of the moving box and rotatably connected thereto, a mounting frame is fixed on the active rod, a rotating wheel is rotatably connected to the mounting frame, and the rotating wheel is in movably contact with the receiving plate.

[0014] As an optional solution to the technical solution of the present application document, the transmission mechanism includes a plurality of connecting shafts restricted by the inner wall of the moving box and rotatably connected therewith, and a driving gear sleeved and fixed on the active rod, a driven gear sleeved and fixed on the connecting shaft, the driving gear and the driven gear are meshed and connected, a driving gear sleeved and fixed on the rotating rod, the driven gear and the driving gear are meshed and connected.

[0015] As an optional solution to the technical solution of this application document, a coil spring is sleeved on the active rod, the inner end of the coil spring is connected and fixed to the active rod, the outer end of the coil spring is connected and fixed to the moving box, and a support block connected and fixed to the moving box is provided on the lower side of the swing rod.

[0016] As an optional solution to the technical solution of the present application document, a magnet 1 is embedded in one of the rotating wheels, a contact control switch is installed at the bottom of the projector near the rotating wheel with magnet 1, a contact piece of the control switch is connected to the top of the receiving plate through a spring, and a magnet 2 is provided on the side of the contact piece close to the receiving plate to attract magnet 1.

[0017] 3. Beneficial effects

[0018] Compared with the prior art, the advantages of the present invention are:

[0019] 1. The technical solution of this application provides a protective plate and a driving mechanism, and utilizes the protective plate to fix and protect the projector, so that the projector can be effectively protected when the staff uses the projector, avoiding damage to the projector that affects the normal progress of the lecture teaching.

[0020] 2. The technical solution of this application enables staff to adjust the placement of the projector by providing a screw sleeve, a screw rod and a gasket, which is convenient for staff to adjust the projection effect of the projector and is conducive to ensuring the effect of lecture teaching.

[0021] 3. The technical solution of this application sets up a stabilizing component, which can further reinforce the projector when the receiving plate carries the projector into the inner cavity of the mobile box, ensuring that the projector can be in a stable state when the staff carries the device to move, thereby improving the protective effect of the device on the projector. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1This is a schematic diagram of the overall structure of a portable multimedia presentation device for a smart education system disclosed in a preferred embodiment of the present application;

[0023] Figure 2 This is a schematic diagram of the structure inside the mobile box of the portable multimedia presentation device for the smart education system disclosed in a preferred embodiment of the present application;

[0024] Figure 3 This is a schematic diagram of the structure inside the movable box when the receiving plate moves upward in the portable multimedia presentation device for a smart education system disclosed in a preferred embodiment of the present application;

[0025] Figure 4 This is a schematic structural diagram of a protective component in a portable multimedia presentation device for a smart education system disclosed in a preferred embodiment of the present application;

[0026] Figure 5 This is a schematic cross-sectional view of the structure of a rotating frame in a portable multimedia presentation device for a smart education system disclosed in a preferred embodiment of the present application;

[0027] Figure 6 This is a schematic structural diagram of a screw sleeve, a screw rod, and a gasket in a portable multimedia presentation device for a smart education system disclosed in a preferred embodiment of the present application;

[0028] Figure 7 This is a schematic structural diagram of a stabilizing component in a portable multimedia presentation device for a smart education system disclosed in a preferred embodiment of the present application;

[0029] Explanation of the numbers in the figure: 1. Moving box; 2. Attachment plate; 201. Limiting groove; 3. Box cover; 4. Partition; 5. Fixing sleeve; 6. Guide rod; 7. Stabilizing assembly; 701. Active rod; 702. Swing rod; 703. Active gear; 704. Mounting frame; 705. Driven gear; 706. Driving gear; 707. Rotating wheel; 708. Coil spring; 709. Ball; 710. Pressure plate; 711. Rotating Rod; 712, connecting shaft; 713, support block; 8, second electric push rod; 9, protective assembly; 901, protection plate; 902, first electric push rod; 903, rack; 904, fixed shaft; 905, connecting gear; 906, roller; 907, rotating frame; 908, connecting rod; 909, spring; 910, screw sleeve; 911, screw; 912, gasket; 10, connecting plate; 11, projector. DETAILED DESCRIPTION

[0030] See also Figure 1-7 , the present invention provides a technical solution:

[0031] A portable multimedia presentation device includes a mobile box 1, which is rotatably connected to a box cover 3. Several partitions 4 are provided on one side of the interior of the mobile box 1. A receiving plate 2 for placing a projector 11 is also provided in the mobile box 1. A lifting drive is provided on the lower side of the receiving plate 2, which can drive the receiving plate 2 to move up and down. Several limiting grooves 201 are provided on the receiving plate 2. A protective component 9 is also provided on the receiving plate 2. The protective component 9 includes several symmetrically arranged protective plates 901 and a driving mechanism. The protective plates 901 are slidably connected to the limiting grooves 201, and the driving mechanism can drive the protective plates 901 on both sides to move in opposite directions along the limiting grooves 201.

[0032] In this embodiment, a worker places the projector 11 on the top surface of the receiving plate 2. Under the action of the driving mechanism, the protective plate 901 moves from both sides to the middle to fix the projector 11. This effectively protects the projector 11 during use and movement, preventing damage to the projector 11 that could affect the lecture.

[0033] Specifically, such as Figure 4 As shown, the driving mechanism includes a first electric push rod 902 provided on one of the protective plates 901 and a fixed shaft 904 that is restricted by the receiving plate 2 and rotatably connected thereto, a connecting gear 905 is sleeved and fixed on the fixed shaft 904, and the output end of the first electric push rod 902 is connected and fixed to the protective plate 901 on the other side, and two racks 903 are meshed and connected on both sides of the connecting gear 905 in a centrally symmetrical structure, and the racks 903 are connected and fixed to the corresponding protective plates 901.

[0034] In this embodiment, under the action of the first electric push rod 902, the protection plate 901 on one side and the corresponding rack 903 move toward the middle. Since the rack 903 is engaged with the gear 905, the protection plate 901 on the other side will also move toward the middle.

[0035] Further, such as Figure 5 As shown, the protective plate 901 is densely covered with multiple rotating frames 907, and the rotating frames 907 are provided with connecting rods 908. The ends of the connecting rods 908 are restricted by the rotating frames 907 and are slidably connected thereto. The connecting rods 908 are rotatably connected to the rollers 906, and the connecting rods 908 are provided with springs 909 that are connected and fixed to the rotating frames 907.

[0036] In this embodiment, the purpose of providing the spring 909 is to better protect the projector 11 , and the purpose of providing the roller 906 is to facilitate the staff to adjust the projector 11 .

[0037] Furthermore, the protective component 9 also includes a plurality of adjustment mechanisms provided on the receiving plate 2. The adjustment mechanisms include a gasket 912 provided on the upper side of the receiving plate 2 and a lifting mechanism. The lifting mechanism can drive the gasket 912 to move up and down.

[0038] In this embodiment, under the action of the lifting mechanism, the gasket 912 can move up and down, so that the staff can adjust the placement state of the projector 11, thereby facilitating the staff to adjust the projection effect of the projector 11, which is conducive to ensuring the effect of lecture teaching.

[0039] Furthermore, if Figure 6 As shown, the lifting mechanism includes a plurality of screw sleeves 910 embedded in the receiving plate 2 , the screw sleeves 910 are internally threaded with screw rods 911 , the upper ends of the screw rods 911 are fixedly connected to gaskets 912 , and the gaskets 912 are in pressure contact with the bottom of the projector 11 .

[0040] In this embodiment, the worker can screw the screw 911 to drive the gasket 912 to move up and down, thereby fine-tuning the position of the projector 11 and making the image projected by the projector 11 square and beautiful.

[0041] It is worth noting that if Figure 2 and Figure 3 As shown, the lifting drive includes a second electric push rod 8 arranged in the mobile box 1, and the output end of the second electric push rod 8 is connected to a connecting plate 10 fixedly connected to the receiving plate 2. A plurality of fixed sleeves 5 are also provided in the mobile box 1, and the inner wall of the fixed sleeve 5 is slidably connected to a guide rod 6 fixedly connected to the receiving plate 2.

[0042] In this embodiment, under the action of the second electric push rod 8, the connecting plate 10 can drive the receiving plate 2 and the projector 11 on its upper side to move up and down, and the fixing sleeve 5 and the guide rod 6 can play a limiting role, so that the receiving plate 2 can be raised and lowered stably.

[0043] It is worth noting that see Figure 7 A stabilizing assembly 7 is also provided in the mobile box 1. The stabilizing assembly 7 includes several rotating rods 711, an active mechanism and a transmission mechanism provided in the inner cavity of the mobile box 1. The rotating rod 711 is restricted by the inner wall of the mobile box 1 and is rotatably connected thereto. A swing rod 702 is provided on the rotating rod 711. A ball 709 is embedded on the swing rod 702 and rotates with the inner wall thereof. A pressure plate 710 is provided on the ball 709. The active mechanism can drive the rotating rod 711 to rotate around its axis position under the transmission of the transmission mechanism.

[0044] In this embodiment, when the receiving plate 2 and the projector 11 on its upper side move to the inner cavity of the mobile box 1, under the action of the active mechanism and the transmission mechanism, the rotating rod 711 drives the swing rod 702 and the pressure plate 710 to swing downward until the pressure plate 710 is in close contact with the projector 11, further reinforcing the projector 11 and improving the protective effect of this device on the projector 11.

[0045] In addition, Figure 7 As shown, the active mechanism includes several active rods 701 restricted by the inner wall of the mobile box 1 and rotatably connected thereto, a mounting frame 704 is fixed on the active rod 701, a rotating wheel 707 is rotatably connected to the mounting frame 704, and the rotating wheel 707 is in active contact with the receiving plate 2.

[0046] In this embodiment, when the receiving plate 2 moves into the movable box 1 and contacts the rotating wheel 707 , the mounting bracket 704 then drives the active rod 701 to rotate around the axis of the active rod 701 .

[0047] In addition, Figure 7 As shown, the transmission mechanism includes several connecting shafts 712 that are restricted by the inner wall of the moving box 1 and rotatably connected thereto, and a driving gear 703 that is sleeved and fixed on the active rod 701. A driven gear 705 is sleeved and fixed on the connecting shaft 712, and the driving gear 703 is meshed and connected with the driven gear 705. A driving gear 706 is sleeved and fixed on the rotating rod 711, and the driven gear 705 is meshed and connected with the driving gear 706. The diameter of the driving gear 706 is smaller than the diameter of the driving gear 703 and the driven gear 705.

[0048] In this embodiment, when the active rod 701 rotates, the active gear 703 rotates accordingly. Since the active gear 703 is meshed with the driven gear 705 and the driven gear 705 is meshed with the driving gear 706, the driving gear 706 will drive the rotating rod 711 to rotate. The driving gear 706 is designed to be small in size, so that a small rotation of the active rod 701 can drive the swing rod 702 to swing significantly, thereby realizing the pressure and fixation of the pressure plate 710 on the projector 11.

[0049] In addition, a coil spring 708 is sleeved on the active rod 701, the inner end of the coil spring 708 is connected and fixed to the active rod 701, and the outer end of the coil spring 708 is connected and fixed to the mobile box 1. A support block 713 connected and fixed to the mobile box 1 is provided on the lower side of the swing rod 702, and the support block 713 is magnetically matched with the swing rod 702.

[0050] In this embodiment, the coil spring 708 and support block 713 are provided to limit the swing arm 702 to a certain extent, preventing the swing arm 702 from swinging freely while the receiving plate 2 is located outside the movable housing 1, thereby preventing the swing arm 702 from dangling and causing malfunction of the device. When the projector 11 is extended for use, the swing arm 702 is fixed to one side of the support block 713 by magnetic attraction, preventing the swing arm 702 from shaking and affecting the performance of the projector 11.

[0051] It should be noted that a magnet 1 is embedded in one of the rotating wheels 707, and a contact control switch is installed at the bottom of the projector 11 near the rotating wheel 707 where the magnet 1 is installed. The top of the receiving plate 2 is connected to a contact piece of the control switch through a spring, and a magnet 2 is provided on the side of the contact piece close to the receiving plate 2 to attract the magnet 1.

[0052] In this embodiment, when the receiving plate 2 moves into the movable housing 1 and contacts the rotating wheel 707, the first magnet in the rotating wheel 707 attracts the second magnet on the receiving plate 2, causing the contact piece to overcome the spring force and move toward the receiving plate 2, thereby disengaging the contact piece from the contact control switch and powering off the projector 11. This prevents the projector 11 from being forgotten to turn off the power when it is stored in the movable housing 1, especially when powered by a battery, which would cause unnecessary energy consumption and affect the next use. At the same time, ensuring that the projector 11 is powered off when idle can further improve its safety.

[0053] When the relevant staff needs to use this device, the staff first places the projector 11 on the receiving plate 2. Under the action of the first electric push rod 902, the protective plate 901 on one side and the corresponding rack 903 move toward the middle. Since the rack 903 is engaged with the gear 905, the protective plate 901 on the other side will also move toward the middle, and this will continue until the roller 906 is in close contact with the projector 11, and the projector 11 can be fixed.

[0054] When the staff needs to adjust the placement of the projector 11 during use of the projector 11 , the staff can screw the screw 911 so that the screw 911 drives the gasket 912 to move up and down, thereby adjusting the placement of the projector 11 .

[0055] When the projector 11 is finished using, under the action of the second electric push rod 8, the connecting plate 10 drives the receiving plate 2 and the projector 11 on its upper side to move into the movable box 1. When the receiving plate 2 contacts the rotating wheel 707, the mounting bracket 704 immediately drives the active rod 701 to rotate around the axis position of the active rod 701, and the active gear 703 rotates accordingly. Since the active gear 703 is meshed with the driven gear 705 and the driven gear 705 is meshed with the driving gear 706, the driving gear 706 will drive the rotating rod 711, the swing rod 702 and the pressure plate 710 to rotate, and the pressure plate 710 is immediately pressed on the projector 11 to further fix the projector 11.

Claims

1. A portable multimedia presentation device, comprising a mobile housing, characterized in that: The movable box body is rotatably connected to a box cover, and the movable box body is further provided with a receiving plate for placing the projector. The lower side of the receiving plate is provided with a lifting drive, and the lifting drive can drive the receiving plate to move up and down; The receiving plate is provided with a plurality of limiting grooves, and a protective assembly is further provided on the receiving plate. The protective assembly includes a plurality of protective plates and a driving mechanism. The protective plates are slidably connected to the limiting grooves, and the driving mechanism is used to drive the protective plates on both sides to move in opposite directions along the limiting grooves. The movable box is also provided with a stabilizing assembly, which includes a plurality of rotating rods, an active mechanism and a transmission mechanism provided in the inner cavity of the movable box. The rotating rod is limited by the inner wall of the movable box and is rotatably connected thereto. A swing rod is fixed on the rotating rod, and a pressure plate is rotatably provided on the swing rod. The pressure plate is in active contact with the top of the imager. The active mechanism can drive the rotating rod to rotate around its axis position under the transmission of the transmission mechanism, so as to realize the pressure of the pressure plate against the top of the imager. The driving mechanism includes a first electric push rod provided on one of the protective plates and a fixed shaft limited by the receiving plate and rotatably connected thereto, a connecting gear is sleeved and fixed on the fixed shaft, the output end of the first electric push rod is connected and fixed to the protective plate on the other side, two racks are meshed and connected on both sides of the connecting gear, and the racks are connected and fixed to the corresponding protective plates; The protection assembly further includes a plurality of adjustment mechanisms provided on the receiving plate, wherein the adjustment mechanisms include a gasket provided on the upper side of the receiving plate and a lifting mechanism, wherein the lifting mechanism is used to drive the gasket to move up and down; The lifting mechanism includes a plurality of screw sleeves embedded in the receiving plate, wherein the screw sleeves are internally threaded with screw rods, the upper ends of the screw rods are fixedly connected to gaskets, and the gaskets are in pressure contact with the bottom of the projector; The active mechanism includes a plurality of active rods constrained by and rotatably connected to the inner wall of the movable box, a mounting bracket fixed on the active rod, a rotating wheel rotatably connected to the mounting bracket, and the rotating wheel movably contacts the receiving plate; A magnet 1 is embedded in one of the rotating wheels, and a contact control switch is installed at the bottom of the projector near the rotating wheel with magnet 1. The top of the receiving plate is connected to a contact piece of the control switch through a spring, and a magnet 2 is provided on the side of the contact piece close to the receiving plate to attract magnet 1.

2. The portable multimedia presentation device according to claim 1, characterized in that: The protection plate is densely covered with a plurality of rotating frames, each of which is provided with a connecting rod. The end of the connecting rod is restricted by the rotating frame and is slidably connected thereto. A roller is rotatably connected to the connecting rod, and the connecting rod is provided with a spring fixedly connected to the rotating frame.

3. The portable multimedia presentation device according to claim 1, characterized in that: The lifting drive includes a second electric push rod arranged in the mobile box body, and the output end of the second electric push rod is connected to a connecting plate fixedly connected to the receiving plate. A plurality of fixed sleeves are also provided in the mobile box body, and the inner wall of the fixed sleeve is slidably connected to a guide rod fixedly connected to the receiving plate.

4. The portable multimedia presentation device according to claim 1, characterized in that: The transmission mechanism includes a plurality of connecting shafts restricted by the inner wall of the moving box and rotatably connected thereto, and a driving gear sleeved and fixed on the active rod, a driven gear sleeved and fixed on the connecting shaft, the driving gear and the driven gear are meshed and connected, and a driving gear sleeved and fixed on the rotating rod, the driven gear and the driving gear are meshed and connected.

5. The portable multimedia presentation device according to claim 1, characterized in that: A coil spring is sleeved on the active rod, the inner end of the coil spring is connected and fixed to the active rod, the outer end of the coil spring is connected and fixed to the moving box, and a support block connected and fixed to the moving box is provided on the lower side of the swing rod.

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