A multifunctional lecturer's platform for university teaching

Abstract

The application discloses a multifunctional lecturer's platform for university teaching and relates to the technical field of lecturer's platforms. The platform comprises a base, a supporting plate arranged on the base, a folding seat slidingly connected to one side of the base, a synchronous mechanism arranged at the bottom end of the folding seat and extending into the supporting plate, and a jacking mechanism connected to the platform and arranged above the synchronous mechanism. The folding seat with the folding and unfolding functions comprises folding legs and fixed legs for supporting, and the end portions of the folding legs and the fixed legs are rotatably connected with load-bearing plates for people to sit on. The folding seat, the synchronous mechanism and the jacking mechanism are arranged, and the side plate, the end plate and the middle column are arranged in the telescopic structure. When the folding seat is opened, the height of the platform is lowered, and when the folding seat is stored, the height of the platform is raised, so that the self-adaptive adjustment of the height of the platform is realized.

Description

Technical Field

[0001] This invention relates to the field of lecturer podium technology, specifically a multifunctional lecturer podium for university teaching. Background Technology

[0002] A lecturer's podium is a platform placed in a classroom to assist in classroom teaching. In the current technology, the podium can hold teaching aids, chalk, books and other products necessary in the teaching process. At the same time, with the development of the times, a control touch screen connected to a projection screen or display screen is generally added to the podium.

[0003] In university courses, major courses require at least one large lecture per day, which consists of two smaller lectures, each lasting one hour. This is very tiring for the instructors, so a chair is usually placed next to the podium so that they can rest after standing for a long time and alleviate the discomfort caused by standing for a long time.

[0004] However, there is a height difference when the teacher is standing and sitting. When the teacher sits down, the height of the podium is above chest level. This height is not conducive to the teacher's use when sitting. Therefore, this application provides a multifunctional lecturer podium that can adjust the height of the chair and the podium simultaneously. Summary of the Invention

[0005] The purpose of this invention is to provide a multifunctional lecturer's podium for university teaching, in order to solve the problem that the height of the podium is above chest level when the teacher is seated, which is not conducive to the teacher's use when seated.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a multifunctional lecturer's podium for university teaching, comprising a base and a support plate disposed on the base, the support plate being a telescopic structure, a folding seat being slidably connected to one side of the base, a synchronization mechanism extending into the support plate being disposed at the bottom end of the folding seat, and a lifting mechanism connected to the podium being connected above the synchronization mechanism.

[0007] The folding seat with folding and unfolding function includes folding legs and fixed legs for support, and the ends of the folding legs and fixed legs are rotatably connected to a load-bearing plate for people to sit on.

[0008] The other end of the folding leg is rotatably connected to a counterweight roller, the counterweight roller is provided with a slot, and the interior of the folding leg is provided with a limiting mechanism to restrict the rotation direction of the counterweight roller;

[0009] A limiting part for limiting the rotation angle of the counterweight roller;

[0010] The synchronization mechanism that moves in sync with the fixed leg includes a rack and a gear for transmission, wherein the rack and the gear mesh with each other;

[0011] The rack moves synchronously with the fixed leg;

[0012] A horizontal plate and a lifting plate are used to drive the support plate to move up and down. The horizontal plate is slidably connected to the inner cavity of the support plate laterally, and the lifting plate is slidably connected to the inner cavity of the support plate vertically.

[0013] The top of the horizontal plate is formed with a first inclined surface, and the bottom of the lifting plate is formed with a second inclined surface, with the first inclined surface and the second inclined surface fitting together.

[0014] As a further embodiment of the present invention: the support plate includes a side plate, an end plate and a middle column, and a podium is provided at the top of the side plate, the end plate and the middle column. The side plate, the end plate and the middle column are all telescopic structures, and the telescopic structure is an upper and lower sleeve structure.

[0015] As a further embodiment of the present invention: the bottom end of the load-bearing plate is provided with a receiving groove for accommodating the folding leg, the limiting part is formed at one end of the receiving groove, and a limiting mechanism for limiting the load-bearing plate is installed at one end of the intermediate column.

[0016] As a further embodiment of the present invention: the limiting mechanism includes a fixed column, a rotating column, a fixed clamping block, a displacement block, a movable clamping block, a spring, and a protruding plate;

[0017] The fixed column is fixedly connected to one end of the non-telescopic part of the intermediate column, the rotating column is rotatably connected to one end of the fixed column, the fixed clamping block is formed on one end of the rotating column, the displacement block is slidably connected to the inside of the rotating column, the movable clamping block is formed on the bottom end of the displacement block, the spring is connected between the displacement block and the inner wall end of the rotating column, and one end of the fixed column has a protruding plate formed to restrict the downward rotation of the rotating column.

[0018] The lifting part of the intermediate column is provided with a strip groove for accommodating the limiting mechanism. The bottom end of the strip groove is flat and is used to limit the rotation direction of the fixed column.

[0019] As a further embodiment of the present invention: the side of the fixed clamping block and the movable clamping block that are far apart from each other has an inclined surface structure, and the side of the fixed clamping block and the movable clamping block that are close to each other has a vertical plane structure.

[0020] As a further embodiment of the present invention: the rotating ends of the two fixed legs are connected by a synchronous shaft, and the rotating ends of the two folding legs are connected by a synchronous shaft.

[0021] As a further embodiment of the present invention: a plurality of balls for reducing friction are rotatably connected to the first inclined surface at the top of the horizontal plate, and the lifting plate is slidably connected to the balls.

[0022] As a further embodiment of the present invention: a first sliding groove is provided in the interior of the side plate in a horizontal direction, and a second sliding groove is provided in the interior of the side plate in a vertical direction. The horizontal plate is slidably connected to the first sliding groove by a slider, and the lifting plate is slidably connected to the second sliding groove by a slider.

[0023] As a further embodiment of the present invention: the bottom end of the horizontal plate is provided with a toothed block that meshes with the gear; the bottom end of the rack is connected to a sliding plate that is slidably connected to the base; a synchronizing rod is connected between the sliding plate and the fixed leg; and a shaft-mounted motor connected to the gear is installed on the fixed part of the side plate.

[0024] As a further embodiment of the present invention: the limiting mechanism includes a locking member with one end inclined, an elastic member connected to the flat end of the locking member, the locking member being axially slidably connected to the folding leg, the elastic member being connected to the inner wall end of the folding leg, and a sliding groove being provided on the inner wall of the folding leg for the locking member to be axially slidably connected.

[0025] Compared with the prior art, the beneficial effects of the present invention are:

[0026] 1. By setting up a folding seat, a synchronization mechanism and a lifting mechanism, and setting the side panels, end panels and middle columns as telescopic structures, the height of the podium will decrease when the folding seat is opened and increase when the folding seat is closed, thereby achieving adaptive adjustment of the podium height. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the structure of the present invention;

[0028] Figure 2 This is a schematic diagram of the internal structure of the side plate of the present invention;

[0029] Figure 3 This is a schematic diagram of the lifting mechanism of the present invention;

[0030] Figure 4 This is a schematic diagram of the limiting mechanism structure of the present invention;

[0031] Figure 5 This is a schematic diagram of the folding seat structure of the present invention;

[0032] Figure 6 This is a schematic diagram of the installation of the fixing column of the present invention;

[0033] Figure 7This is a schematic diagram showing the connection between the limiting mechanism and the slot in this invention.

[0034] In the diagram: 1. Base; 2. Side plate; 3. End plate; 4. Middle column; 5. Podium; 6. Limiting mechanism; 601. Fixed column; 602. Rotating column; 603. Fixed clamping block; 604. Displacement block; 605. Moving clamping block; 606. Spring; 607. Protruding plate; 7. Folding seat; 701. Load-bearing plate; 702. Folding leg; 703. Fixed leg; 704. Receiving groove; 705. Counterweight roller; 706. Limiting part; 8. Synchronization mechanism; 801. Synchronization rod; 802. Slide plate; 803. Rack; 804. Gear; 9. Lifting mechanism; 901. Horizontal plate; 902. Lifting plate; 10. Strip groove; 11. Limiting mechanism; 1101. Engaging part; 1102. Elastic part; 12. Shaft-holding motor; 13. Slot. Detailed Implementation

[0035] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. 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.

[0036] Please see Figures 1 to 7 In this embodiment of the invention, a multifunctional lecturer's podium for university teaching includes a base 1 and a support plate disposed on the base 1. The support plate has a telescopic structure. A folding seat 7 is slidably connected to one side of the base 1. A synchronization mechanism 8 extending into the support plate is disposed at the bottom end of the folding seat 7. A lifting mechanism 9 connected to the podium 5 is connected above the synchronization mechanism 8. The support plate includes a side plate 2, an end plate 3, and a middle column 4. The podium 5 is disposed at the top of the side plate 2, the end plate 3, and the middle column 4. The side plate 2, the end plate 3, and the middle column 4 are all telescopic structures, and the telescopic structure is an upper and lower nested structure.

[0037] In this embodiment: When a university teacher sits down using this device, the user pushes the vertically positioned load-bearing plate 701 towards the central column 4. The load-bearing plate 701 rotates around its connection point with the fixed leg 703, pressing against the movable clamping block 605. The movable clamping block 605 then moves the displacement block 604 axially, compressing the spring 606 until the load-bearing plate 701 and the movable clamping block 605 are completely separated. The movable clamping block 605 and the spring 606 then reset. The user then pulls the load-bearing plate 701 in the opposite direction, causing it to rotate. The load-bearing plate 701 then contacts the inclined surface of the movable clamping block 605, which in turn compresses the rotating column 602. Moving upwards allows the load-bearing plate 701 to rotate out. During the rotation of the load-bearing plate 701, the folding leg 702 and the counterweight roller 705 remain vertically downwards under the influence of gravity until the counterweight roller 705 contacts the ground. At this point, the load-bearing plate 701 is tilted. The folding leg 702 is then restrained by hand, and the load-bearing plate 701 is leveled. The folding leg 702 continues to rotate away from the fixed leg 703 until it contacts the restraining part 706, completing the opening of the load-bearing plate 701. During the rotation of the counterweight roller 705, several slots 13 rotate along with it. During rotation, the slots 13 press against the inclined surface of the locking member 1101. 01. The folding leg 702 moves axially inside. When the slot 13 aligns with the engaging member 1101, the engaging member 1101, under the elastic action of the elastic member 1102, resets and engages with the slot 13. Since the other end of the engaging member 1101 is flat, it can prevent the counterweight roller 705 from rotating in the opposite direction. Also, since the folding leg 702 forms an obtuse angle with the load-bearing plate 701 after opening, it can prevent the folding leg 702 from rotating when subjected to other external forces. Then, by starting the bearing motor 12, the bearing motor 12 drives the gears 804 located inside the two side plates 2 to rotate. The two gears 804 respectively drive the rack 803 connected to them and the horizontal plate 901 to move. The rack 803 is connected to the synchronous rod 80 through the slide plate 802. 1. The mechanism moves, thereby moving the fixed leg 703 and the load-bearing plate 701. The load-bearing plate 701 moves axially. At this time, the gear 804, due to its rotatable connection with the side plate 2, rotates. Simultaneously, the gear 804 drives the horizontal plate 901 to move axially through the gear block. Meanwhile, the lifting plate 902 moves vertically downward under the action of gravity, thereby adjusting the overall height of the device and realizing the synchronous adjustment function of the folding seat 7 and the podium 5. It should be noted that the lifting parts of the podium 5, the side plate 2, the end plate 3, and the middle column 4 are made of lightweight but appropriately rigid materials to prevent the podium 5 from moving due to excessive weight. Also, when the podium 5 is at its highest height...At this time, the outermost teeth of the horizontal plate 901 and the rack 803 are located at the top and bottom of the drive gear 804, respectively. The limiting mechanism 6 simultaneously provides corresponding protection. When folding the seat 7, the load-bearing plate 701 should be lifted first until the counterweight roller 705 separates from the ground. Then, the axle motor 12 is reversed via a switch to reset the folding seat 7. During the downward movement of the lifting part of the middle column 4, when the limiting mechanism 6 contacts the fixed part of the middle column 4, the limiting mechanism 6 can enter the slot 10 under pressure. When the lifting part of the middle column 4 resets upward, the limiting mechanism 6 rotates out of the slot 10 and resets. The slot 10 is inclined outwards, meaning the bottom end of the slot 10 is deeper than its top end, preventing the limiting mechanism 6 from failing to rotate out automatically.

[0038] Please refer to this carefully. Figure 2 The synchronization mechanism 8, which moves synchronously with the fixed leg 703, includes a rack 803 and a gear 804 for transmission, with the rack 803 and gear 804 meshing with each other; wherein the rack 803 moves synchronously with the fixed leg 703, and a shaft motor 12 connected to the gear 804 is installed on the fixed part of the side plate 2; a toothed block that meshes with the gear 804 is provided at the bottom end of the horizontal plate 901, and a sliding plate 802 that is slidably connected to the base 1 is connected to the bottom end of the rack 803, with a synchronization rod 801 connecting the sliding plate 802 and the fixed leg 703.

[0039] In this embodiment: the shaft motor 12 is started, which drives the gears 804 located inside the two side plates 2 to rotate. The two gears 804 respectively drive the rack 803 and the horizontal plate 901 connected to them to move. The rack 803 moves through the slide plate 802 and the synchronous rod 801, thereby driving the fixed leg 703 and the load-bearing plate 701 to move. The load-bearing plate 701 moves axially. At this time, the gears 804 rotate because they are rotatably connected to the side plates 2. At the same time, the gears 804 drive the horizontal plate 901 to move axially through the tooth blocks. The lifting plate 902 moves vertically downward under the action of gravity, thereby adjusting the overall height of the device and realizing the synchronous adjustment function of the folding seat 7 and the podium 5.

[0040] Please refer to this carefully. Figure 2 and Figure 3 The horizontal plate 901 and the lifting plate 902 are used to drive the support plate to move up and down. The horizontal plate 901 is slidably connected to the inner cavity of the support plate in the lateral direction, and the lifting plate 902 is slidably connected to the inner cavity of the support plate in the vertical direction.

[0041] The horizontal plate 901 has a first inclined surface at its top end and the lifting plate 902 has a second inclined surface at its bottom end, with the first and second inclined surfaces fitting together. Multiple ball bearings for reducing friction are rotatably connected to the first inclined surface at the top end of the horizontal plate 901, and the lifting plate 902 is slidably connected to the ball bearings. The side plate 2 has a first horizontally arranged groove inside and a second vertically arranged groove inside. The horizontal plate 901 is slidably connected to the first groove by a slider, and the lifting plate 902 is slidably connected to the second groove by a slider.

[0042] In this embodiment: During the rotation of the drive gear 804, it meshes with the toothed block at the bottom of the horizontal plate 901, thereby driving the horizontal plate 901 to move axially. At this time, the moving direction of the horizontal plate 901 is opposite to the moving direction of the rack 803. When the horizontal plate 901 moves, the second inclined surface at the bottom of the lifting plate 902 is misaligned with the first inclined surface at the top of the horizontal plate 901. At this time, the lifting plate 902 moves downward, and the podium 5 moves downward with the lifting plate 902. The support plate shortens synchronously, thereby reducing the overall height of the product. Thus, the overall height changes with the unfolding or folding of the folding seat 7.

[0043] Please refer to this carefully. Figure 1 , Figure 2 , Figure 5 The folding seat 7 with folding and unfolding function includes folding legs 702 and fixed legs 703 for support, and the ends of the folding legs 702 and fixed legs 703 are rotatably connected to a load-bearing plate 701 for people to sit on.

[0044] Among them, a counterweight roller 705 is rotatably connected to the other end of the folding leg 702;

[0045] A limiting part 706 is used to limit the rotation angle of the counterweight roller 705; a receiving groove 704 for accommodating the folding leg 702 is provided at the bottom end of the load-bearing plate 701, and the limiting part 706 is formed at one end of the receiving groove 704; the rotating ends of the two fixed legs 703 are connected by a synchronous shaft, the rotating ends of the two folding legs 702 are connected by a synchronous shaft, and a limiting mechanism 6 for limiting the load-bearing plate 701 is installed at one end of the intermediate column 4.

[0046] In this embodiment: the load-bearing plate 701 is rotated out. During the rotation of the load-bearing plate 701, the folding leg 702 and the counterweight roller 705 remain vertically downward under the action of gravity until the counterweight roller 705 contacts the ground. At this time, the load-bearing plate 701 is tilted. The folding leg 702 is then restrained by hand, and the load-bearing plate 701 is leveled. The folding leg 702 continues to rotate away from the fixed leg 703 until it contacts the restraining part 706, thus completing the opening of the load-bearing plate 701. After that, the load-bearing plate 701 is pulled axially, and the load-bearing plate 701 drives the fixed leg 703 to move, so that the folding seat 7 can be unfolded and used.

[0047] Please refer to this carefully. Figure 4 The limiting mechanism 6 includes a fixed column 601, a rotating column 602, a fixed clamping block 603, a displacement block 604, a movable clamping block 605, a spring 606, and a protruding plate 607.

[0048] A fixed column 601 is fixedly connected to one end of the non-telescopic part of the intermediate column 4. A rotating column 602 is rotatably connected to one end of the fixed column 601. A fixed clamping block 603 is formed on one end of the rotating column 602. A displacement block 604 is slidably connected to the inside of the rotating column 602. A movable clamping block 605 is formed on the bottom end of the displacement block 604. A spring 606 is connected between the displacement block 604 and the inner wall end of the rotating column 602. One end of the fixed column 601 has a protruding plate 607 formed to restrict the downward rotation of the rotating column 602. The side of the fixed clamping block 603 and the movable clamping block 605 that are far apart from each other has an inclined surface structure, and the side of the fixed clamping block 603 and the movable clamping block 605 that are close to each other has a vertical plane structure.

[0049] In this embodiment: the load-bearing plate 701 presses against the movable clamping block 605, which in turn drives the displacement block 604 to move axially. At this time, the displacement block 604 moves and presses against the spring 606 until the load-bearing plate 701 is completely separated from the movable clamping block 605. Then, the movable clamping block 605 and the spring 606 return to their original positions. Next, the load-bearing plate 701 is pulled in the opposite direction to rotate. At this time, the load-bearing plate 701 contacts the inclined surface of the movable clamping block 605. The movable clamping block 605 then presses against the rotating column 602 and moves it upwards, thus rotating the load-bearing plate 701 out. When storing the load-bearing plate 701, its upward rotation is in contact with the fixed... When the inclined surfaces of clamping block 603 make contact, the fixed clamping block 603 is forced to rotate the rotating column 602 upward. When the load-bearing plate 701 separates from the fixed clamping block 603, the rotating column 602 rotates downward under the action of gravity. At this time, the load-bearing plate 701 is stuck between the fixed clamping block 603 and the movable clamping block 605, thus completing the limitation of the load-bearing plate 701. It should be noted that under the reset action of spring 606, the maximum distance between the movable clamping block 605 and the fixed clamping block 603 is slightly greater than the thickness of the load-bearing plate 701, thereby avoiding the problem that the load-bearing plate 701 cannot be effectively stuck between the fixed clamping block 603 and the movable clamping block 605.

[0050] Please refer to this carefully. Figure 1 and Figure 6 The lifting part of the intermediate column 4 is provided with a strip groove 10 for accommodating the limiting mechanism 6. The bottom end of the strip groove 10 is flat and is used to limit the rotation direction of the fixed column 601.

[0051] In this embodiment: during the downward movement of the lifting part of the intermediate column 4, when the limiting mechanism 6 contacts the fixed part of the intermediate column 4, the limiting mechanism 6 can enter the strip groove 10 under the action of the squeezing force. When the lifting part of the intermediate column 4 returns to its original position, the limiting mechanism 6 rotates out of the strip groove 10 and returns to its original position. The strip groove 10 is set with an outward inclination, that is, the bottom end of the strip groove 10 is deeper than the top end of the strip groove 10, which can avoid the problem that the limiting mechanism 6 cannot rotate out automatically.

[0052] Please refer to this carefully. Figure 7 The counterweight roller 705 is provided with a slot 13, and the interior of the folding leg 702 is provided with a limiting mechanism 11 that limits the rotation direction of the counterweight roller 705. The limiting mechanism 11 includes a locking member 1101 with one end inclined. The flat end of the locking member 1101 is connected to an elastic member 1102. The locking member 1101 is axially slidably connected to the folding leg 702. The elastic member 1102 is connected to the end of the inner wall of the folding leg 702. The inner wall of the folding leg 702 is provided with a sliding groove for the locking member 1101 to slide axially.

[0053] In this embodiment: During the rotation of the counterweight roller 705, several slots 13 rotate along with the counterweight roller 705. During the rotation, the slots 13 will press against the inclined surface of the locking member 1101. At this time, the locking member 1101 moves axially inside the folding leg 702. When the slot 13 is aligned with the locking member 1101, the locking member 1101 is reset and locked into the slot 13 under the elastic action of the elastic member 1102. Since the other end of the locking member 1101 is in a flat state, it can prevent the counterweight roller 705 from rotating in the opposite direction. And since the folding leg 702 is at an obtuse angle with the load-bearing plate 701 after opening, it can prevent the folding leg 702 from rotating when subjected to other external forces.

[0054] The above description is merely a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A multifunctional lecturer's podium for university teaching, comprising a base (1) and a support plate disposed on the base (1), characterized in that, The support plate is a telescopic structure. A folding seat (7) is slidably connected to one side of the base (1). A synchronization mechanism (8) extending into the support plate is provided at the bottom of the folding seat (7). A lifting mechanism (9) connected to the podium (5) is connected above the synchronization mechanism (8). The folding seat (7) with folding and unfolding function includes folding legs (702) and fixed legs (703) for support, and the ends of the folding legs (702) and fixed legs (703) are rotatably connected to a load-bearing plate (701) for people to sit on. The other end of the folding leg (702) is rotatably connected to a counterweight roller (705), the counterweight roller (705) is provided with a slot (13), and the interior of the folding leg (702) is provided with a limiting mechanism (11) that restricts the rotation direction of the counterweight roller (705). Limiting part (706) for limiting the rotation angle of the counterweight roller (705); The synchronization mechanism (8) that operates synchronously with the fixed leg (703) includes a rack (803) and a gear (804) for transmission, wherein the rack (803) and the gear (804) mesh with each other; The rack (803) moves synchronously with the fixed leg (703); The horizontal plate (901) and the lifting plate (902) are used to drive the support plate to move up and down. The horizontal plate (901) is slidably connected to the inner cavity of the support plate laterally, and the lifting plate (902) is slidably connected to the inner cavity of the support plate vertically. The top end of the horizontal plate (901) is formed with a first inclined surface, and the bottom end of the lifting plate (902) is formed with a second inclined surface, the first inclined surface and the second inclined surface are in contact with each other; The support plate includes a side plate (2), an end plate (3) and a middle column (4), and a limiting mechanism (6) for limiting the load-bearing plate (701) is installed at one end of the middle column (4). The limiting mechanism (6) includes a fixed column (601), a rotating column (602), a fixed clamping block (603), a displacement block (604), a movable clamping block (605), a spring (606), and a protruding plate (607). The fixed column (601) is fixedly connected to one end of the non-telescopic part of the intermediate column (4), the rotating column (602) is rotatably connected to one end of the fixed column (601), the fixed clamping block (603) is formed on one end of the rotating column (602), the displacement block (604) is slidably connected to the inside of the rotating column (602), the moving clamping block (605) is formed on the bottom end of the displacement block (604), the spring (606) is connected between the displacement block (604) and the inner wall end of the rotating column (602), and one end of the fixed column (601) has a protruding plate (607) formed to restrict the downward rotation of the rotating column (602). The middle column (4) has a strip groove (10) on its lifting part for accommodating the limiting mechanism (6). The bottom end of the strip groove is flat and is used to limit the rotation direction of the fixed column (601). The fixed clamping block (603) and the movable clamping block (605) are inclined on the side away from each other, and the fixed clamping block (603) and the movable clamping block (605) are vertical on the side close to each other.

2. The multifunctional lecturer's podium for university teaching according to claim 1, characterized in that, A podium (5) is provided at the top of the side plate (2), end plate (3) and middle column (4). The side plate (2), end plate (3) and middle column (4) are all telescopic structures, and the telescopic structure is a top-and-bottom sleeve structure.

3. A multifunctional lecturer's podium for university teaching according to claim 2, characterized in that, The bottom end of the load-bearing plate (701) is provided with a receiving groove (704) for accommodating the folding leg (702), and the limiting part (706) is formed at one end of the receiving groove (704).

4. A multifunctional lecturer's podium for university teaching according to claim 1, characterized in that, The rotating ends of the two fixed legs (703) are connected by a synchronous shaft, and the rotating ends of the two folding legs (702) are connected by a synchronous shaft.

5. A multifunctional lecturer's podium for university teaching according to claim 1, characterized in that, A plurality of ball bearings for reducing friction are rotatably connected to the first inclined surface at the top of the horizontal plate (901), and the lifting plate (902) is slidably connected to the ball bearings.

6. A multifunctional lecturer's podium for university teaching according to claim 2, characterized in that, The side plate (2) has a first horizontally arranged sliding groove inside, and the side plate (2) also has a second vertically arranged sliding groove inside. The horizontal plate (901) is slidably connected to the first sliding groove by a slider, and the lifting plate (902) is slidably connected to the second sliding groove by a slider.

7. A multifunctional lecturer's podium for university teaching according to claim 6, characterized in that, The bottom end of the horizontal plate (901) is provided with a tooth block that meshes with the gear (804), the bottom end of the rack (803) is connected to a slide plate (802) that is slidably connected to the base (1), a synchronizing rod (801) is connected between the slide plate (802) and the fixed leg (703), and a shaft-mounted motor (12) connected to the gear (804) is installed on the fixed part of the side plate (2).

8. A multifunctional lecturer's podium for university teaching according to claim 1, characterized in that, The limiting mechanism (11) includes a locking member (1101) with one end inclined. An elastic member (1102) is connected to the flat end of the locking member (1101). The locking member (1101) is axially slidably connected to the folding leg (702). The elastic member (1102) is connected to the inner wall end of the folding leg (702). The inner wall of the folding leg (702) is provided with a sliding groove for the locking member (1101) to slide axially.

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