Holographic 3D projection device for educational presentations

Abstract

The utility model discloses a kind of holographic 3D projection equipment for teaching display, it is related to teaching display appliance technical field.The holographic 3D projection equipment of the utility model includes holographic 3D projector and trolley, the holographic 3D projector includes the projection support of C shape, the projection support bottom is detachably fixed with intelligent sand table, the projection support top is provided with laser light source, the laser light source below is provided with pyramid transparent film, and the holographic 3D projector is fixed on trolley.3D holographic projection equipment shows significant advantage in education display by its naked eye 3D effect, high interactivity and real feeling, improves display effect and user experience.

Description

Technical Field

[0001] This utility model relates to the field of teaching aids technology, and in particular to a holographic 3D projection device for teaching demonstrations. Background Technology

[0002] The necessity of 3D holographic projection technology in teaching demonstrations lies in its unique advantages, which can significantly enhance teaching effectiveness, optimize the learning experience, and break through the limitations of traditional teaching. Holographic projection generates three-dimensional images through the principles of interference and diffraction, achieving a naked-eye 3D effect without the need for any devices, making teaching content more intuitive and vivid. Furthermore, combined with touch-sensing technology, students can interact with the projected content in real time, such as operating virtual models or participating in virtual experiments, enhancing their sense of participation. It has particularly promising applications in teaching demonstrations, not only for the intuitive three-dimensional display of mechanical structures and transmission principles, but also for multi-dimensional presentations in subjects such as Chinese language, political education, history, and geography, and for vivid demonstrations of video and audio materials showcasing the deeds of advanced or historical figures. It can also adapt to interdisciplinary collaboration and has a clear advantage in concretizing abstract knowledge and concepts.

[0003] Furthermore, holographic projection instruments are high-precision instruments, and configuring them in various teaching scenarios is costly. Usually, a small number of 3D projection instruments are used in a mobile manner via a trolley. However, the high-frequency vibrations caused by road bumps can cause significant damage to such high-precision instruments. The trolley, which has shock absorption function, is a flexible support and cannot provide stable support for the instrument during projection. Therefore, it cannot be guaranteed that the instrument will not shake due to its normal operation vibration, and the projection effect is difficult to guarantee.

[0004] Therefore, those skilled in the art are dedicated to developing a highly interactive and realistic holographic 3D projection device for teaching demonstrations that can filter out walking bumps. Summary of the Invention

[0005] In view of the above-mentioned deficiencies of the prior art, the technical problem to be solved by this utility model is to provide a holographic 3D projection device for teaching demonstration that is highly interactive and realistic and can filter out walking bumps.

[0006] To achieve the above objectives, a holographic 3D projection device for teaching demonstrations is characterized in that the holographic 3D projection device includes a holographic 3D projector and a trolley. The trolley includes a base plate and wheels fixed to the bottom of the base plate. Several columns are provided on the base plate. From bottom to top, each column has a sliding lifting plate, a shock-absorbing spring, and a mounting plate. The two ends of the shock-absorbing spring are fixedly connected to the lifting plate and the mounting plate, respectively. The holographic 3D projector is fixedly mounted on the mounting plate. A lifting assembly is fixedly mounted on the base plate, and the telescopic end of the lifting assembly is fixedly connected to the lifting plate. A locking hook assembly is provided between the lifting plate and the mounting plate, and the locking hook assembly is adapted to switch the shock-absorbing spring between a free state and a compressed state. The holographic 3D projector includes a C-shaped projection stand, a detachable and fixed intelligent sand table at the bottom of the projection stand, a laser light source at the top of the projection stand, and a pyramid-shaped transparent film below the laser light source.

[0007] Preferably, the number of columns is four; Preferably, the tops of the two rear columns are provided with handles.

[0008] Preferably, the lifting component is a gas spring. Gas springs are existing technology, such as the gas springs used for height adjustment under the seat of an office chair; the specific structure of the gas spring will not be described in detail.

[0009] Preferably, the locking hook assembly is a quick-release latch.

[0010] Preferably, the walking wheels are equipped with a braking assembly (not shown in the figure) to prevent the cart from moving unnecessarily.

[0011] Preferably, the pyramidal transparent film is made of plexiglass or acrylic sheet.

[0012] Preferably, the holographic 3D projector is equipped with an audio player.

[0013] This utility model relates to a holographic projection device for teaching demonstration and the walking and projection conditions of its trolley.

[0014] During the holographic 3D projection demonstration, the intelligent sand table can display maps, landforms, urban rail transit, ecological resource distribution, etc. The laser light source can project people, buildings, cultural relics, climate, etc. The light source projected onto the transparent membrane structure of the pyramid can present a three-dimensional structure. The audio player can play voice to explain the course, or play music or songs to make the teaching more immersive, enhance the display effect and user experience.

[0015] During walking operation, the lifting assembly lowers the lifting plate, mounting plate, and holographic 3D projector to their lowest positions, reducing the overall center of gravity of the trolley and improving walking stability; the locking hook assembly is in the released state, that is, the shock-absorbing spring is in the free state, and the shock-absorbing spring filters out the high-frequency vibrations generated by small bumps on the road surface, reducing damage to the holographic 3D projector. During projection, the lifting component is adjusted to the required working height, while the locking hook component is in the locked state, i.e., the shock-absorbing spring is in a compressed state, which is closer to a rigid support, providing more stable support for the holographic 3D projector and preventing the shock-absorbing spring from being too weak, which would cause the holographic 3D projector to float up and down due to its normal working vibration, thus affecting the projection effect.

[0016] Compared with the prior art, the present invention has the following beneficial effects: 3D holographic projection devices, with their naked-eye 3D effect, high interactivity and realism, have shown significant advantages in educational displays, enhancing the display effect and user experience.

[0017] In walking mode, the center of gravity is lowered by the lifting component to improve walking stability, and the shock-absorbing spring is released to a free state by the locking hook component, which filters out high-frequency vibrations caused by small bumps on the road surface, reduces damage to the holographic 3D projector, and extends its service life. In projection mode, the appropriate projection height is adjusted by the lifting component, and the shock-absorbing spring is compressed by the locking hook component, making it closer to a rigid support, preventing the holographic 3D projector from floating up and down due to its normal operating vibration, thus improving the projection effect. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0019] Figure label: 1. Vehicle floor; 2. Wheels; 3. Columns; 4. Lifting platform; 5. Mounting plate; 6. Shock-absorbing springs; 7. Lifting assembly; 8. Locking hook assembly; 9. Holographic 3D projector; 91. Projection bracket; 92. Intelligent sand table; 93. Laser light source; 94. Pyramid transparent film; 10. Handle. Detailed Implementation

[0020] The following description, with reference to the accompanying drawings, illustrates several preferred embodiments of the present invention to make its technical content clearer and easier to understand. The present invention can be embodied in many different forms, and the scope of protection of the present invention is not limited to the embodiments mentioned herein.

[0021] In the accompanying drawings, components with the same structure are indicated by the same numerical designation, and components with similar structures or functions are indicated by similar numerical designations. The dimensions and thicknesses of each component shown in the drawings are arbitrary, and this invention does not limit the dimensions and thicknesses of each component. To make the illustrations clearer, the thickness of some components has been appropriately exaggerated in the drawings. Example 1

[0022] refer to Figure 1 This utility model discloses a holographic projection device for teaching demonstration. The holographic 3D projection device includes a holographic 3D projector and a trolley. The trolley includes a base plate 1 and wheels 2 fixed to the bottom of the base plate 1. Several columns 3 are provided on the base plate. From bottom to top, a lifting plate 4, a shock-absorbing spring 6, and a mounting plate 5 are arranged on the columns 3. The two ends of the shock-absorbing spring 6 are fixedly connected to the lifting plate 4 and the mounting plate 5, respectively. A holographic 3D projector 99 is fixedly mounted on the mounting plate 5. A lifting assembly 7 is fixedly mounted on the base plate 1. The telescopic end of the lifting assembly 7 is fixedly connected to the lifting plate 4. A locking hook assembly 8 is provided between the lifting plate 4 and the mounting plate 5. The locking hook assembly 8 is adapted to switch the shock-absorbing spring 6 between a free state and a compressed state. The holographic 3D projector 9 includes a C-shaped projection bracket 91, a detachable and fixed intelligent sand table 92 at the bottom of the projection bracket 91, a laser light source 93 at the top of the projection bracket 91, and a pyramidal transparent film 94 below the laser light source 93.

[0023] Preferably, the number of columns 3 is four; Preferably, the tops of the two rear columns 3 are provided with handles 10.

[0024] Preferably, the lifting component 7 is a gas spring. Gas springs are existing technology, such as the gas springs used for height adjustment under the seat of an office chair; the specific structure of the gas spring will not be described in detail.

[0025] Preferably, the locking hook assembly 8 is a quick-release latch.

[0026] Preferably, the walking wheel 2 is equipped with a braking assembly (not shown in the figure) to prevent the cart from moving unnecessarily.

[0027] Preferably, the pyramidal transparent film 94 is made of plexiglass or acrylic sheet.

[0028] Preferably, the holographic 3D projector 9 is equipped with an audio player. This utility model demonstrates the teaching and demonstration capabilities of its holographic projection equipment and the movement and projection capabilities of its trolley.

[0029] During the holographic 3D projection demonstration, the intelligent sand table can display maps, landforms, urban rail transit, ecological resource distribution, etc. The laser light source can project people, buildings, cultural relics, climate, etc. The light source projected onto the transparent membrane structure of the pyramid can present a three-dimensional structure. The audio player can play voice to explain the course, or play music or songs to make the teaching more immersive, enhance the display effect and user experience.

[0030] During the walking operation, the lifting assembly 7 lowers the lifting plate 4, mounting plate 5 and holographic 3D projector 99 to the lowest state, reducing the overall center of gravity of the trolley and improving walking stability; the locking hook assembly 8 is in the released state, that is, the shock-absorbing spring 6 is in the free state, and the shock-absorbing spring 6 filters the high-frequency vibration generated by small bumps on the road surface, reducing damage to the holographic 3D projector 99. During projection, the lifting component 7 is adjusted to the required working height, while the locking hook component 8 is in the locked state, that is, the shock-absorbing spring 6 is in the compressed state, which is closer to a rigid support, providing more stable support for the holographic 3D projector 99, preventing the shock-absorbing spring 6 from being too weak, causing the holographic 3D projector 99 to float up and down due to its normal working vibration, thus affecting the projection effect. Example 2

[0031] A sand table model was set up based on the terrain of Baini Village, showcasing the surrounding mountains and crisscrossing fields.

[0032] Scene 1: The scene of Huang Wenxiu's first arrival in Baini Village, communicating with the villagers and learning about the village's situation is presented through a 3D projection, with an audio player playing Huang Wenxiu's original words from her diary as narration; Scene 2: Shows Huang Wenxiu visiting villages and households to gain a deeper understanding of the villagers' living conditions. Huang Wenxiu's walking route can be displayed on the smart sand table, and background music can be played by the audio player. Scene 3: Showcasing Huang Wenxiu leading villagers to develop industries and improve infrastructure, such as using 3D models to display tangerine planting and road construction, while an audio player plays Huang Wenxiu's reflections on helping farmers; Scene 4: The text showcases Huang Wenxiu's spirit of dedication, while the audio player plays an inspiring narration.

[0033] The preferred embodiments of this utility model have been described in detail above. It should be understood that those skilled in the art can make numerous modifications and variations based on the concept of this utility model without creative effort. Therefore, all technical solutions that can be obtained by those skilled in the art based on the concept of this utility model through logical analysis, reasoning, or limited experimentation on the basis of existing technology should be within the scope of protection defined by the claims.

Claims

1. A holographic 3D projection device for teaching demonstrations, characterized in that, The holographic 3D projection device includes a holographic 3D projector (9) and a trolley. The trolley includes a base plate (1) and wheels (2) fixed to the bottom of the base plate (1). Several columns (3) are provided on the base plate. A lifting plate (4), a shock-absorbing spring (6), and a mounting plate (5) that can slide up and down along the column (3) are arranged sequentially from bottom to top on the column (3). The two ends of the shock-absorbing spring (6) are fixedly connected to the lifting plate (4) and the mounting plate (5) respectively. The holographic 3D projector (9) is fixedly installed on the mounting plate (5). A lifting assembly (7) is fixedly installed on the base plate (1). The telescopic end of the lifting assembly (7) is fixedly connected to the lifting plate (4). A locking hook assembly (8) is provided between the lifting plate (4) and the mounting plate (5). The locking hook assembly (8) is adapted to switch the shock-absorbing spring (6) between a free state and a compressed state. The holographic 3D projector (9) includes a C-shaped projection bracket (91), a detachable and fixed intelligent sand table (92) is provided at the bottom of the projection bracket (91), a laser light source (93) is provided at the top of the projection bracket (91), and a pyramid transparent film (94) is provided below the laser light source (93).

2. The holographic 3D projection device for teaching demonstration as described in claim 1, characterized in that, The number of columns (3) is four.

3. The holographic 3D projection device for teaching demonstration as described in claim 2, characterized in that, The tops of the two rear columns (3) are provided with handles (10).

4. The holographic 3D projection device for teaching demonstration as described in claim 1, characterized in that, The lifting component (7) is a pneumatic rod.

5. The holographic 3D projection device for teaching demonstration as described in claim 1, characterized in that, The locking hook assembly (8) is a quick-release locking buckle.

6. The holographic 3D projection device for teaching demonstration as described in claim 1, characterized in that, The traveling wheel (2) is equipped with a braking assembly.

7. The holographic 3D projection device for teaching demonstration as described in claim 1, characterized in that, The pyramidal transparent film (94) is made of plexiglass or acrylic sheet.

8. The holographic 3D projection device for teaching demonstration as described in claim 1, characterized in that, The holographic 3D projector (9) is equipped with an audio player.

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