Lift multimedia podium

Abstract

The present application relates to teaching auxiliary equipment technical field, specifically relates to lifting type multimedia podium, including base and table board, the top of base is fixedly connected with fixed column, the bottom of table board is fixedly connected with threaded cylinder, the bottom of table board is fixedly connected with fixed block, the fixed column is equipped with lifting assembly, the top of table board is opened with recess, the recess is equipped with turnover plate, the top of turnover plate is embedded with display screen, the middle of fixed block is opened with transmission cavity, the bottom of turnover plate is hingedly connected with moving rack, the middle of transmission cavity is rotatably connected with fixed shaft, the fixed shaft is fixedly connected with gear on the same axis, gear is engaged with moving rack, the inner wall of transmission cavity is slidably connected with fixed rack, the bottom end of fixed rack is fixedly connected with the top of base, the present application drives the engagement transmission of fixed rack, gear and moving rack when the table board is lifted, makes turnover plate automatically adjust inclination angle, realizes the self-adapting linkage of table board height and display screen angle, avoids the frequent low head or adjustment posture of teacher, improves the use comfort.

Description

Technical Field

[0001] This invention relates to the field of teaching aids technology, specifically to a liftable multimedia lectern. Background Technology

[0002] As a core facility in the teaching setting, the lectern provides teachers with a stable surface to place lesson plans, teaching aids, and blackboard writing tools, ensuring ease of operation during lectures. With technological advancements and the widespread adoption of digital teaching, multimedia lecterns are increasingly used in classrooms. Also known as electronic lecterns, multimedia electronic lecterns, or centrally controlled lecterns, these products integrate a lectern with a computer, multimedia control system, video display stand, audio equipment, audio-visual converters, and other electronic devices. They utilize multimedia computers to comprehensively process and control various media information, including symbols, language, text, sound, graphics, images, and videos. The various elements of multimedia are organically combined according to teaching requirements and projected onto a screen or projector. Teaching or training is completed through human-computer interaction between the user and the computer. This provides teachers with a more convenient teaching environment while allowing students to access more vivid and concrete knowledge points, thus improving teaching efficiency. For example, the Zhongyue Bohua TS307 height-adjustable multimedia lectern uses an electric lifting system, an integrated equipment structure, and a safety protection design. The electric lifting system allows the lectern height to adapt to different teachers' heights, reducing fatigue from standing for long periods. The integrated design avoids safety hazards caused by exposed cables, and the locking system protects the equipment from theft or damage. However, in actual use, during the teaching process of the Yuebohua TS307 height-adjustable multimedia lectern, after adjusting the platform height to the corresponding position via the lifting system and unlocking the locking system, the built-in monitor on the flip panel is placed on top of the platform for easy operation by the teacher. After flipping, the monitor and the top of the platform are on the same plane. When the teacher is standing to teach, their line of sight is usually level or slightly downward. The monitor screen, which is level with the platform, is below the teacher's line of sight. This forces the teacher to frequently look down to see the screen content. Maintaining this posture for a long time not only easily causes neck fatigue but also distracts the teacher and affects the smoothness of the teaching. At the same time, because the screen is parallel to the platform surface, the display angle of the screen may not form the optimal vertical or tilt angle with the teacher's line of sight, which can easily cause glare or blind spots, further reducing the readability of the screen content. This forces the teacher to adjust their body posture or head angle when operating the equipment or viewing the teaching content, thus affecting the user experience and teaching efficiency.

[0003] Therefore, this invention proposes a liftable multimedia lectern to solve the above problems. Summary of the Invention

[0004] To address the aforementioned issues, this invention provides a height-adjustable multimedia lectern. The lifting and lowering of the lectern drives the meshing transmission of a fixed rack and pinion, and a moving rack, enabling the tilting plate to automatically adjust its angle. This achieves adaptive linkage between the lectern height and the display screen angle, preventing teachers from frequently bending down or adjusting their posture and improving user comfort.

[0005] To achieve the above objectives, the technical solution of the present invention is as follows: a lifting multimedia lectern, comprising a base and a platform, wherein symmetrically arranged fixed columns are fixedly connected to the top of the base, and a plurality of threaded cylinders corresponding to the fixed columns are fixedly connected to the bottom of the platform, and a fixed block is fixedly connected to the bottom of the platform, wherein the two sides of the fixed block are respectively fixedly connected to the outer wall of the corresponding threaded cylinder, and the threaded cylinders are all slidably engaged with the corresponding fixed columns, and each fixed column is provided with a lifting component for controlling the height of the platform. The top of the table has a groove, and a flip plate is installed in the groove. The bottom of the flip plate, near the blackboard, is hinged to the bottom wall of the groove. A display screen is embedded in the top of the flip plate. A transmission cavity is opened in the middle of the fixed block. A movable rack is hinged to the bottom of the flip plate, away from the blackboard. The bottom end of the movable rack extends through the table into the transmission cavity, and the movable rack slides along the height of the transmission cavity sidewall. A fixed shaft is rotatably connected in the middle of the transmission cavity. A gear is coaxially fixedly connected to the fixed shaft. The gear meshes with the movable rack. A fixed rack that meshes with the gear slides along the height of the transmission cavity sidewall, away from the movable rack. The bottom end of the fixed rack is fixedly connected to the top of the base.

[0006] The technical principle of the above solution is as follows: When the teacher drives the lifting assembly to drive the platform and move the fixed block up or down, the transmission cavity inside the fixed block also moves synchronously. Since the bottom end of the fixed rack is fixed to the base, when the transmission cavity rises with the platform, the fixed rack and the transmission cavity move relative to each other. The relative movement of the fixed rack forces the gear to rotate clockwise around the fixed shaft axis through meshing with the gear. The rotation of the gear further drives the moving rack that meshes with it to slide upward along the height direction of the transmission cavity. The top of the moving rack is hinged to the side of the flip plate away from the blackboard. When the moving rack slides upward, it will push up the side of the flip plate away from the blackboard, causing the flip plate to drive the display screen to flip upward around the hinge point near the blackboard, increasing the angle. When the moving rack slides downward, this side of the flip plate will move downward under the action of gravity and the pulling force of the moving rack, causing it to flip downward around the hinge point, decreasing the angle.

[0007] The above approach has the following beneficial effects: 1. This solution adjusts the monitor's tilt angle automatically to accommodate the teacher's height by adjusting the platform, ensuring that the monitor remains at a comfortable tilt angle when the teacher is standing. 2. This solution, through adaptive adjustment of the platform height and display screen angle to the teacher's lifting height, avoids the frequent head-down or posture adjustments required when the display screen and platform are on the same plane, thus improving the teacher's comfort when using the podium.

[0008] Furthermore, each lifting component includes a motor, which is connected to the controller of the multimedia lectern via a signal connection. The other end of each motor output shaft is fixedly connected to a threaded rod, and the threads inside the threaded cylinder mesh with the threads on the corresponding threaded rod.

[0009] Beneficial effects: By driving the threaded rod to rotate through the motor, and using the thread engagement to drive the threaded cylinder to rise and fall, the height of the platform can be electrically adjusted, accurately controlling the platform height, making operation convenient and adapting to the needs of teachers of different heights.

[0010] Furthermore, both the inner wall of the threaded cylinder and the surface of the threaded rod are coated with polytetrafluoroethylene.

[0011] Beneficial effects: The polytetrafluoroethylene coating has a low coefficient of friction, which can reduce frictional resistance in the threaded transmission process and improve the smoothness and service life of the lifting system.

[0012] Furthermore, the surfaces of the moving rack, the fixed rack, and the gears are all coated with a wear-resistant coating.

[0013] Beneficial effects: The wear-resistant coating enhances the surface hardness of transmission components, reduces wear during long-term meshing motion, extends the service life of the transmission system, and ensures the stability of angle adjustment.

[0014] Furthermore, a locking plate located above the display screen is slidably fitted on the top of the tabletop, with both sides of the locking plate slidably fitted with the sidewalls of the groove.

[0015] Beneficial effect: The drawers save table space by being hidden under the tabletop, making the tabletop surface neater.

[0016] Furthermore, the locking plate is equipped with a lock for closing the groove.

[0017] Beneficial effects: The opening and closing of the groove is controlled by a lock, preventing the equipment from being stolen or accidentally damaged, thus improving the security of the lectern.

[0018] Furthermore, a drawer for placing the keyboard slides into the bottom of the tabletop.

[0019] Beneficial effects: The drawers are hidden under the tabletop, saving surface space and making the layout of the podium neater, while also making it easier for teachers to operate the keyboard.

[0020] Furthermore, a buffer pad is fixedly connected to the bottom wall of the groove.

[0021] Beneficial effect: When the flip panel descends and closes, the buffer pad can absorb the impact force and prevent the impact force generated by the flip panel colliding with the bottom of the groove when it descends from indirectly damaging the display screen.

[0022] Furthermore, a U-shaped baffle is fixedly connected to the top of the platform.

[0023] Beneficial effects: Prevents lesson plans, teaching aids, and other items from slipping off the edge of the tabletop, improving safety during use.

[0024] Furthermore, a lighting strip is fixedly connected to the top of the barrier, and the lighting strip is connected to the controller signal of the multimedia lectern.

[0025] Beneficial effect: Provides local lighting, making it easier for teachers to operate equipment or read lesson plans when the light is insufficient. Attached Figure Description

[0026] Figure 1 This is an isometric view of the multimedia lectern as an embodiment of the lifting multimedia lectern of the present invention; Figure 2 This is a front sectional view of the fixed column in an embodiment of the lifting multimedia lectern of the present invention; Figure 3 This is a side sectional view of the fixed block in an embodiment of the lifting multimedia lectern of the present invention.

[0027] The reference numerals in the accompanying drawings of the instruction manual include: 1. base; 2. platform; 3. fixed column; 4. threaded cylinder; 5. fixed block; 6. flip plate; 7. transmission cavity; 8. moving rack; 9. fixed shaft; 10. gear; 11. fixed rack; 12. motor; 13. threaded rod; 14. locking plate; 15. drawer; 16. baffle; 17. display screen. Detailed Implementation

[0028] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0029] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0030] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0031] The following detailed description illustrates the specific implementation method: Example 1: As attached Figure 1 As shown: A height-adjustable multimedia lectern includes a base 1 and a platform 2. The top of the base 1 is fixedly connected to symmetrically arranged fixing columns 3 by bolts. Several threaded cylinders 4 corresponding to the fixing columns 3 are welded to the bottom of the platform 2. Fixing blocks 5 are welded to the bottom of the platform 2. The two sides of the fixing blocks 5 are respectively welded to the outer walls of the corresponding threaded cylinders 4. The threaded cylinders 4 are all slidably engaged with the corresponding fixing columns 3. A drawer 15 for placing a keyboard is slidably engaged on the bottom of the platform 2 near the blackboard. When the monitor is flipped up, it is on the same plane as the top of the platform 2. When the teacher stands to teach, his line of sight is usually level or slightly downward. The monitor screen, which is level with the platform 2, will be below the teacher's line of sight, causing the teacher to have to frequently look down to see the screen content. This not only easily causes neck fatigue for the teacher, but also easily distracts the teacher's attention, affecting the fluency and efficiency of teaching. To improve the fluency of teaching and the comfort of teachers using the podium, as shown in the attached document... Figure 2 and attached Figure 3As shown, each fixed column 3 is equipped with a lifting assembly for controlling the height of the control panel 2. Each lifting assembly includes a motor 12, preferably a Swiss MAXON model. The motor 12 is connected to the controller of the multimedia lectern via signal transmission. The output shaft of each motor 12 is coaxially fixed to a threaded rod 13 by bolts. The threads inside the threaded cylinder 4 mesh with the threads on the corresponding threaded rod 13 (the inner wall of the threaded cylinder 4 and the surface of the threaded rod 13 are coated with polytetrafluoroethylene to reduce frictional resistance during thread transmission and improve the smoothness of the lifting system). The top of the panel 2 has a groove, and a tilting mechanism is provided in the groove. The rotating plate 6 is hinged to the bottom wall of the groove near the blackboard at the bottom (a buffer pad is fixedly connected to the bottom wall of the groove. When the rotating plate 6 is lowered and closed, the buffer pad can absorb the impact force and prevent the rotating plate 6 from colliding with the bottom of the groove and indirectly damaging the display screen 17). The display screen 17 is embedded in the top of the rotating plate 6. The top of the platform 2 is slidably fitted with a locking plate 14 located above the display screen 17. Both sides of the locking plate 14 are slidably fitted with the side wall of the groove. The locking plate 14 is equipped with a lock for closing the groove. The opening and closing of the groove is controlled by the locking plate 14 and the lock to protect the components inside the groove. A transmission cavity 7 is formed in the middle of the fixed block 5. A movable rack 8 is hinged to the bottom of the flip plate 6 on the side away from the blackboard. The bottom end of the movable rack 8 extends into the transmission cavity 7 through the groove and the platform 2. The movable rack 8 slides with the side wall of the transmission cavity 7 along its height direction. A fixed shaft 9 is rotatably connected to the middle of the transmission cavity 7. A gear 10 is coaxially welded to the fixed shaft 9. The gear 10 meshes with the movable rack 8. A fixed rack 11, which meshes with the gear 10, slides with the side wall of the transmission cavity 7 away from the movable rack 8 along the height direction of the transmission cavity 7. The bottom end of the fixed rack 11 is fixedly connected to the top of the base 1 by bolts. (The surfaces of the movable rack 8, the fixed rack 11, and the gear 10 are all coated with a wear-resistant coating to enhance the surface hardness of the transmission components, reduce wear during long-term meshing, and ensure the stability of angle adjustment.) The height of the platform 2 can be adjusted to accommodate the height of different teachers. The tilt angle of the display screen 17 can be adjusted while the platform 2 is raised or lowered, so that teachers do not need to frequently look down at the screen when teaching in a standing posture, reducing neck fatigue and improving user comfort.

[0032] The specific implementation process is as follows: When using the multimedia lectern for teaching, firstly, the teacher sends a signal to the motor 12 through the controller of the multimedia lectern according to their own height needs. After the motor 12 starts, the output shaft drives the threaded rod 13 to rotate, so that the threaded cylinder 4 rises and falls stably along the fixed column 3 under the rotation of the threaded rod 13, thereby driving the platform 2 to rise or fall synchronously, so as to achieve precise adjustment of the height of the platform 2 to adapt to the height needs of different teachers. When the platform 2 rises, the fixing block 5 at the bottom of the platform 2 moves synchronously, and the transmission cavity 7 in the middle of the fixing block 5 also moves synchronously with the fixing block 5. Since the bottom end of the fixing rack 11 is fixed to the top of the base 1 by bolts, when the transmission cavity 7 rises with the platform 2, relative movement occurs between the fixing rack 11 and the transmission cavity 7. The relative movement of the fixing rack 11 forces the gear 10 to rotate clockwise around the fixed shaft 9 through meshing with the gear 10. The rotation of the gear 10 further drives the moving rack 8, which meshes with it, to slide upward along the height direction of the transmission cavity 7. The top end of the moving rack 8 is hinged to the side of the bottom of the flip plate 6 away from the blackboard. When the moving rack 8 slides upward, it will push the flip plate 6 away from the blackboard upward. On one side of the platform, the flip plate 6 causes the display screen 17 to flip upward around the hinge point near the blackboard, increasing the angle. When the platform 2 descends, the transmission cavity 7 moves downward accordingly, changing the relative motion direction between the fixed rack 11 and the transmission cavity 7. The gear 10 rotates counterclockwise, causing the moving rack 8 to slide downward. This side of the flip plate 6 moves downward under the action of gravity and the pulling force of the moving rack 8, flipping downward around the hinge point, decreasing the angle. The height of the platform 2 is adjusted according to the teacher's height requirements, and the angle of the display screen 17 is adaptively adjusted according to the height of the platform 2, ensuring that the teacher can easily see the content on the display screen 17 while standing, avoiding frequent head-down or posture adjustments to view the display screen 17, thus improving the comfort of using the lectern in the classroom. During the flipping process of the flipping plate 6, when the flipping plate 6 descends and closes, the buffer pad can absorb the impact force to prevent the impact force generated by the flipping plate 6 colliding with the bottom of the groove when it descends and indirectly damage the display screen 17. At the same time, the surfaces of the moving rack 8, the fixed rack 11 and the gear 10 are all provided with wear-resistant coatings, which enhance the surface hardness of the transmission components, reduce wear in long-term meshing motion, and ensure the stability of angle adjustment. When the display screen 17 is not in use, the groove is closed by sliding the locking plate 14 on both sides with the groove sidewall. After closing, the locking plate 14 is locked by the lock to protect the components in the groove and prevent the equipment from being stolen or accidentally damaged. The drawer 15 at the bottom of the table 2 near the blackboard is used to place the keyboard. The design of hiding it under the table 2 saves space on the table 2 and makes the surface of the podium cleaner.

[0033] Example 2: As attached Figure 1 As shown, the difference from Embodiment 1 is that a U-shaped baffle 16 is fixedly connected to the top of the table 2 to prevent teaching materials, teaching aids and other items from slipping off the edge of the table 2, thereby improving safety.

[0034] Example 3: As attached Figure 1As shown, the difference from Embodiment 2 is that a lighting strip is attached to the top of the baffle 16. The lighting strip is preferably an LED strip. The lighting strip is connected to the controller signal of the multimedia lectern and provides local lighting for the lectern, making it convenient for teachers to operate equipment or read lesson plans when there is insufficient light.

[0035] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the scope of protection of this invention.

Claims

1. A lifting multimedia lectern, comprising a base (1) and a platform (2), wherein the top of the base (1) is fixedly connected to symmetrically arranged fixed columns (3), the bottom of the platform (2) is fixedly connected to a plurality of threaded cylinders (4) corresponding to the fixed columns (3), and the bottom of the platform (2) is fixedly connected to a fixed block (5), the two sides of the fixed block (5) being fixedly connected to the outer wall of the corresponding threaded cylinder (4), and the threaded cylinders (4) slidingly engaging with the corresponding fixed columns (3), characterized in that: Each fixed column (3) is equipped with a lifting component for controlling the height of the control panel (2); The top of the table (2) has a groove, and a flip plate (6) is provided in the groove. The bottom of the flip plate (6) is hinged to the bottom wall of the groove on the side closest to the blackboard. The top of the flip plate (6) has a display screen (17). The middle of the fixed block (5) has a transmission cavity (7). The bottom of the flip plate (6) is hinged to the side away from the blackboard with a moving rack (8). The bottom end of the moving rack (8) passes through the groove and the table (2) and extends into the transmission cavity (7). The moving rack (8) slides with the side wall of the transmission cavity (7) along its height direction. The middle of the transmission cavity (7) is rotatably connected to a fixed shaft (9). A gear (10) is coaxially fixedly connected to the fixed shaft (9). The gear (10) meshes with the moving rack (8). The side wall of the transmission cavity (7) away from the moving rack (8) slides with a fixed rack (11) that meshes with the gear (10) along the height direction of the transmission cavity (7). The bottom end of the fixed rack (11) is fixedly connected to the top of the base (1).

2. The lifting multimedia lectern according to claim 1, characterized in that: The lifting components all include a motor (12), the motor (12) is connected to the controller signal of the multimedia lectern, and the other end of the output shaft of the motor (12) is fixedly connected to a threaded rod (13). The threads inside the threaded cylinder (4) are engaged with the threads on the corresponding threaded rod (13).

3. The lifting multimedia lectern according to claim 2, characterized in that: The inner wall of the threaded cylinder (4) and the surface of the threaded rod (13) are both coated with polytetrafluoroethylene.

4. The lifting multimedia lectern according to claim 1, characterized in that: The surfaces of the movable rack (8), the fixed rack (11), and the gear (10) are all coated with a wear-resistant coating.

5. The lifting multimedia lectern according to claim 1, characterized in that: The top of the table (2) is slidably fitted with a locking plate (14) located above the display screen (17), and the two sides of the locking plate (14) are slidably fitted with the side wall of the groove.

6. The lifting multimedia lectern according to claim 5, characterized in that: The locking plate (14) is provided with a lock for closing the groove.

7. The lifting multimedia lectern according to claim 1, characterized in that: The bottom of the tabletop (2) has a drawer (15) for placing the keyboard.

8. The lifting multimedia lectern according to claim 1, characterized in that: A cushioning pad is fixedly connected to the bottom wall of the groove.

9. The lifting multimedia lectern according to claim 1, characterized in that: The top of the platform (2) is fixedly connected to a U-shaped baffle (16).

10. The lifting multimedia lectern according to claim 9, characterized in that: A lighting strip is fixedly connected to the top of the barrier (16), and the lighting strip is connected to the controller signal of the multimedia lectern.

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