A conveniently adjustable lecture table

Abstract

The present invention discloses an adjustable lecture desk, comprising a supporting base plate, the upper end surface of the supporting base plate is fixedly connected to a horizontal base plate, the upper end surface edge of the horizontal base plate is fixedly connected to a baffle, a lifting mechanism for height adjustment is embedded in the interior of the supporting base plate, the upper surface of the horizontal base plate is slidably connected to a control slide plate for controlling the lifting height of the lifting mechanism, the control slide plate is connected to the lifting mechanism through a driving mechanism, the driving mechanism comprises a driving rotating rod and a rack, a rotating groove is provided on the upper end surface of the horizontal base plate, the driving rotating rod is rotatably connected to the inside of the rotating groove, the rack is fixedly connected to the bottom of the control slide plate, the lifting mechanism comprises a sliding plate, a threaded rod and a threaded sleeve, the sliding plate is movably sleeved in the interior of the base plate, and the threaded rod is fixedly connected to the upper end surface of the sliding plate. The device greatly improves the convenience and safety of adjusting the lecture desk when in use.

Description

Technical Field

[0001] The invention relates to the technical field of teaching equipment, and in particular to a lecture table which is easy to adjust. Background Art

[0002] A lecture desk refers to the table used by teachers when giving lectures, with books or texts placed on it; it is used for daily teaching or classroom supervision.

[0003] Chinese patent publication number CN111616504A discloses a new type of mathematics teaching desk, including a body, a first block, a second block, a third block, a control panel, a horizontal fixed plate, a telescopic rod, a fixing plate, a fixing plate groove, a display frame, a display board, an external fixing cavity, a hydraulic cylinder, a support platform, and a moving wheel. The bottom of the body is fixedly and symmetrically provided with a base, a hydraulic cylinder is arranged in the base, the hydraulic cylinder is fixedly connected to the body through a support arm, and two doors are hingedly connected on both sides of the body. The first block, the second block, and the third block are fixed from top to bottom in the body, the center position of the bottom plane of the first block is fixedly connected to the display frame through a hydraulic telescopic rod, the upper end surface and the lower end surface of the second block and the third block are symmetrically inlaid with a control panel, a horizontal fixed plate is fixedly inserted on the upper end surface of the body, and the display frame is a hollow cube.

[0004] The existing lecture halls use partial hydraulic structures to achieve the lifting function when in use. The hydraulic cylinders have certain safety hazards. For example, frequent maintenance is required to avoid the risk of explosion caused by long-term pressure on the cylinders. The control structures such as motors are complex and also have corresponding safety risks. Therefore, they are not suitable for teaching rings for young children such as primary schools and kindergartens. Therefore, a highly safe and easy-to-adjust adjustable lecture table is needed to improve the convenience of teachers' lectures and supervision.

[0005] Therefore, it is necessary to provide a lecture table that is easy to adjust to solve the above-mentioned technical problems. Summary of the invention

[0006] The purpose of the present invention is to provide a lecture table that is easy to adjust to solve the above technical problems.

[0007] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a lecture table that is easy to adjust, comprising a supporting base plate, the upper end surface of the supporting base plate is fixedly connected to a horizontal base plate, the upper end surface edge of the horizontal base plate is fixedly connected to a baffle, a lifting mechanism for height adjustment is embedded in the interior of the supporting base plate, the upper surface of the horizontal base plate is slidably connected to a control slide plate for controlling the lifting height of the lifting mechanism, and the control slide plate is connected to the lifting mechanism through a driving mechanism.

[0008] As a further solution of the present invention, the driving mechanism includes a driving rotating rod and a rack, the upper end surface of the horizontal base plate is provided with a rotating groove, the driving rotating rod is rotatably connected inside the rotating groove, the rack is fixedly connected to the bottom of the control skateboard, and the outer end surface of the driving rotating rod is provided with a first tooth piece matched with the rack.

[0009] As a further solution of the present invention, the lifting mechanism includes a sliding plate, a threaded rod and a threaded sleeve. The sliding plate is movably sleeved inside the base plate, the threaded rod is fixedly connected to the upper end surface of the sliding plate, the threaded sleeve is sleeved on the outer end surface of the threaded rod, the threaded sleeve and the threaded rod are threadedly engaged, and the top of the threaded sleeve is fixedly connected to the inner wall of the base plate.

[0010] As a further solution of the present invention, the driving rotating rod passes through the horizontal bottom plate and extends to the inside of the bottom plate, and is fixedly connected to a second bevel gear, and the outer end surface of the threaded sleeve is fixedly connected to a first bevel gear meshing with the second bevel gear.

[0011] Furthermore, the sliding plate extends through the bottom of the base plate, and a sealing film is filled between the lifting mechanism and the sliding plate to improve the safety of the device.

[0012] As a further solution of the present invention, the upper end surface of the horizontal bottom plate is fixedly connected to the limiting slide, the bottom of the control slide is fixedly connected to a "T"-shaped slide rail adapted to the limiting slide, a limiting slide groove is provided inside the limiting slide, an induction pressure plate is elastically embedded inside the limiting slide groove through an elastic part, and the upper end surface of the induction pressure plate is in contact with the bottom of the limiting slide.

[0013] As a further solution of the present invention, a gap is provided between the rack and the first tooth plate, a limiting groove is provided inside the horizontal bottom plate, the driving rotating rod is arranged through the middle of the limiting groove, an extension rod is slidably connected inside the limiting groove, one end of the extension rod is limited by the driving rotating rod through an anti-slip part, and the end of the extension rod facing away from the driving rotating rod is fixedly connected to the bottom of the induction pressure plate.

[0014] Furthermore, a rotating wheel is rotatably embedded in the joint between the induction pressure plate and the "T"-shaped slide rail to reduce surface friction and facilitate sliding.

[0015] As a further solution of the present invention, the anti-slip member includes a limiting tooth and a second tooth piece, the limiting tooth is fixedly connected to the bottom of the side end surface of the extension rod, and the second tooth piece is meshed with the limiting tooth.

[0016] Furthermore, one side of the bottom end of the extension rod is an arc-shaped surface that fits the driving rotating rod, and the limiting tooth is fixedly connected to the arc-shaped surface.

[0017] As a further solution of the present invention, a clamping mechanism is elastically embedded in the inner wall of the limiting slide groove, and the side end faces of the clamping mechanism are respectively embedded with an arc-shaped protrusion and a clamping piece, the arc-shaped protrusion is in contact with the bottom edge of the induction pressure plate, the clamping piece is arranged on the upper end face of the induction pressure plate, and the edge of the "T"-shaped slide rail is provided with a clamping surface that matches the clamping piece.

[0018] Furthermore, the cross-sections of the snap-fit ​​surface and the snap-fit ​​sheet are both right-angled triangles, thereby realizing one-way sliding of the control slide, avoiding frequent movement of the control slide when the lecturer is working, and the extension of the snap-fit ​​sheet is lower than the extension of the arc-shaped protrusion, avoiding failure of the arc-shaped protrusion limit when the control slide moves. The surface of the arc-shaped protrusion can be set to an arc or inclined surface, so that the arc-shaped protrusion presses the snap-fit ​​structure into the interior of the limiting slide groove as the sensing pressure plate moves downward, and the control slide extends out of the surface of the horizontal bottom plate. An embedded handle is embedded in the bottom of the control slide for easy operation of the control slide, and a soft bag and an arc surface are provided on the edge of the control slide to reduce damage caused by collision.

[0019] When the present invention is used, the lecturer needs to stand when giving a lecture, so the height of the podium is relatively high. When doing self-study or other supervisory work, the lecturer is mostly in a sitting position, and thus the height of the podium needs to be lowered to facilitate the lecturer's work and supervision of students. By arranging a control slide and a horizontal bottom plate to be stacked on each other, the baffle plate overlaps with the horizontal bottom plate during the lecture and does not occupy too much podium space, which is convenient for the lecturer to move around and write on the blackboard. When the lecturer needs to sit down, the control slide and the horizontal bottom plate can be unfolded, which can greatly expand the desktop space for the lecturer's office work, and the driving mechanism can also synchronously drive the lifting mechanism to lower the height of the device. The device is simple and convenient to operate, and does not require corresponding electrical and hydraulic components. It is safer and more reliable than in a classroom environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0021] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0022] Figure 2 It is a schematic diagram of the bottom plate structure of the present invention;

[0023] Figure 3 It is a schematic diagram of the bottom structure of the control slide plate of the present invention;

[0024] Figure 4 It is a schematic diagram of the lifting mechanism structure of the present invention;

[0025] Figure 5 The present invention Figure 2 The enlarged structural diagram at A in the middle;

[0026] Figure 6It is a schematic diagram of the cross-sectional structure of the induction pressure plate of the present invention;

[0027] Figure 7 It is a schematic diagram of the structure of the anti-slip part in the induction pressure plate of the present invention;

[0028] Figure 8 It is a schematic diagram of the structure of the induction pressure plate regulating state of the present invention;

[0029] Fig. 9 It is a schematic diagram of the cross-sectional structure of the position-limiting slideway of the present invention;

[0030] Fig.10 It is a schematic diagram of the structure of the clamping mechanism of the present invention.

[0031] In the figure: 1. control slide plate; 2. baffle plate; 3. horizontal bottom plate; 4. support bottom plate; 5. lifting mechanism; 6. sealing film; 7. rotating groove; 8. limiting slideway; 9. driving rotating rod; 10. first tooth piece; 11. rack; 12. clamping surface; 13. "T"-shaped slide rail; 14. embedded handle; 15. first bevel gear; 16. second bevel gear; 17. sliding plate; 18. threaded rod; 19. threaded sleeve; 20. induction pressure plate; 21. limiting slide groove; 22. rotating wheel; 23. elastic member; 24. anti-skid member; 25. extension rod; 26. limiting groove; 27. limiting tooth; 28. second tooth piece; 29. ​​clamping mechanism; 30. arc-shaped protrusion; 31. clamping piece. DETAILED DESCRIPTION

[0032] Embodiment 1

[0033] like Figure 1-3 As shown, a lecture desk that is easy to adjust includes a supporting base plate 4, the upper end surface of the supporting base plate 4 is fixedly connected to a horizontal base plate 3, the upper end surface edge of the horizontal base plate 3 is fixedly connected to a baffle 2, a lifting mechanism 5 for height adjustment is embedded in the interior of the supporting base plate 4, and a control slide plate 1 for controlling the lifting height of the lifting mechanism 5 is slidably connected to the upper surface of the horizontal base plate 3, and the control slide plate 1 is connected to the lifting mechanism 5 through a driving mechanism.

[0034] When in use, the lecturer needs to stand when giving a lecture, so the height of the desk is relatively high. When doing self-study or other supervisory work, the lecturer is mostly sitting, and thus the height of the desk needs to be lowered to facilitate the lecturer's work and supervision of students. By arranging the control slide 1 and the horizontal bottom plate 3 to be stacked on each other, the baffle 2 overlaps with the horizontal bottom plate 3 during the lecture and does not occupy too much podium space, which is convenient for the lecturer to move around and write on the blackboard. When the lecturer needs to sit down, the control slide 1 and the horizontal bottom plate 3 can be unfolded, which can greatly expand the desktop space for the lecturer's office work. At the same time, the lifting mechanism 5 can be synchronously driven by the driving mechanism to lower the height of the device. The device is simple and convenient to operate, and there is no corresponding electrical and hydraulic components. It is safer and more reliable than in a classroom environment.

[0035] Embodiment 2

[0036] Based on the first embodiment, Figure 1-3 As shown, the driving mechanism includes a driving rod 9 and a rack 11. A rotating groove 7 is provided on the upper end surface of the horizontal bottom plate 3. The driving rod 9 is rotatably connected inside the rotating groove 7. The rack 11 is fixedly connected to the bottom of the control slide 1. The outer end surface of the driving rod 9 is provided with a first tooth piece 10 adapted to the rack 11.

[0037] When in use, the sliding of the slide plate 1 is controlled to drive the movement of the bottom rack 11, and then the rotation of the rotating rod 9 is driven by the engagement of the rack 11 with the first tooth plate, and the lifting mechanism is driven by the rotating rod 9 to adjust the height of the device.

[0038] like Figure 1-4 As shown, the lifting mechanism 5 includes a sliding plate 17, a threaded rod 18 and a threaded sleeve 19. The sliding plate 17 is movably sleeved inside the base plate 4, the threaded rod 18 is fixedly connected to the upper end surface of the sliding plate 17, the threaded sleeve 19 is sleeved on the outer end surface of the threaded rod 18, the threaded sleeve 19 and the threaded rod 18 are threadedly engaged, and the top of the threaded sleeve 19 is fixedly connected to the inner wall of the base plate 4.

[0039] like Figure 1-5 As shown, the driving rotating rod 9 passes through the horizontal bottom plate 3 and extends to the inside of the bottom plate 4 , and is fixedly connected to the second bevel gear 16 . The outer end surface of the threaded sleeve 19 is fixedly connected to the first bevel gear 15 meshing with the second bevel gear 16 .

[0040] Furthermore, the sliding plate 17 extends through the bottom of the base plate 4, and a sealing film 6 is filled between the lifting mechanism 5 and the sliding plate 17 to improve the safety of the device.

[0041] When in use, as the horizontal base plate 3 and the control slide plate 1 slide, the control slide plate 1 is pulled out and at the same time drives the rotation of the driving rod 9 through the bottom rack 11 and the first tooth plate 10 on the outer end face of the driving rod 9, thereby driving the rotating rod 9 to drive the rotation of the threaded sleeve 19 through the engagement of the first bevel gear 15 and the second bevel gear 16, so that the threaded rod 18 is rotated and retracted into the interior of the threaded sleeve 19 through the engagement of the threaded sleeve 19 and the threaded rod 18, so that the overall height of the device gradually decreases when the sliding plate 17 is gradually retracted into the interior of the base plate 4, and the height of the device can be controlled by controlling the sliding stroke of the control slide plate 1.

[0042] like Figure 1-3As shown in 5-6, the upper end surface of the horizontal bottom plate 3 is fixedly connected to the limiting slide 8, and the bottom of the control slide 1 is fixedly connected to a "T"-shaped slide rail 13 adapted to the limiting slide 8. A limiting slide groove 21 is provided inside the limiting slide 8, and an induction pressure plate 20 is elastically embedded in the limiting slide groove 21 through an elastic member 23, and the upper end surface of the induction pressure plate 20 fits with the bottom of the limiting slide 8.

[0043] When in use, the horizontal bottom plate 3 and the control slide plate 1 are bidirectionally limited by the adaptation of the "T"-shaped slide rail 13 and the limiting slideway 18, and the moving stroke of the control slide plate 1 is limited to prevent it from deflecting when sliding.

[0044] like Figure 1-3 As shown in 5-6, a gap is provided between the rack 11 and the first tooth plate 10, a limiting groove 26 is provided inside the horizontal bottom plate 3, and the driving rotating rod 9 passes through the middle limiting groove 26. An extension rod 25 is slidably connected inside the limiting groove 26. One end of the extension rod 25 is fitted with the bottom of the driving rotating rod 9 through the anti-slip part 24, and the end of the extension rod 25 facing away from the driving rotating rod 9 is fixedly connected to the bottom of the sensing pressure plate 20.

[0045] Furthermore, a rotating wheel 22 is rotatably embedded in the joint between the induction pressure plate 20 and the “T”-shaped slide rail 13 to reduce surface friction and facilitate sliding.

[0046] When in use, the sensing pressure plate 20 is suspended in the middle of the limiting slide groove 21 under the action of the elastic member 23. While supporting the "T"-shaped slide rail 13, the extension rod 25 presses the driving rotating rod 9 to increase the fixing force between the anti-slip member 24 and the driving rotating rod 9, thereby preventing the driving rotating rod 9 from self-rotating and making the device unstable, thereby improving the safety and stability of the device.

[0047] like Figure 1-3 As shown in FIGS. 5-8 , the anti-slip member 24 includes a limiting tooth 27 and a second tooth piece 28 . The limiting tooth 27 is fixedly connected to the bottom of the side end surface of the extension rod 25 , and the second tooth piece 28 is meshed with the limiting tooth 27 .

[0048] Furthermore, one side of the bottom end of the extension rod 25 is an arcuate surface that fits the driving rotating rod 9, and the limiting teeth 27 are fixedly connected to the arcuate surface. The setting of the arcuate surface can effectively improve the fixing effect of the rotating rod 9.

[0049] When in use, the driving rotating rod 9 is effectively fixed by the engagement of the limit tooth 27 and the second tooth piece 28, and the rotation of the driving rotating rod 9 is effectively avoided through mechanical locking, which causes the device to slide. Furthermore, when the surface of the control skateboard 1 is under pressure, such as the pressure on the control skateboard 1 when a book is placed in it or the lecturer is sitting, the "T"-shaped slide rail 13 drives the sensing pressure plate 20 to move downward. At this time, the rack 11 engages with the first tooth piece 10 to further fix the driving rotating rod 9, and the limit tooth 27 disengages from the second tooth piece 28 as it moves downward, so that the device can control the rotation of the driving rotating rod 9 as the control skateboard 1 slides, thereby effectively achieving the stability and safety of the structure of the device when no control is required, as well as the smoothness during the control intervention process, avoiding interference with the control of the control skateboard 1.

[0050] like Figure 1-5 As shown in Figures 9-10, a snap-fit ​​mechanism 29 is elastically embedded in the inner wall of the limiting slide groove 21, and the side end faces of the snap-fit ​​mechanism 29 are respectively embedded with an arc-shaped protrusion 30 and a snap-fit ​​sheet 31. The arc-shaped protrusion 30 is in contact with the bottom edge of the sensing pressure plate 20, and the snap-fit ​​sheet 31 is arranged on the upper end face of the sensing pressure plate 20, and a snap-fit ​​surface 12 matching the snap-fit ​​sheet 31 is provided on the edge of the "T"-shaped slide rail 13.

[0051] Furthermore, the cross-sections of the snap-fit ​​surface 12 and the snap-fit ​​piece 31 are both right-angled triangles, thereby realizing one-way sliding of the control slide 1 and avoiding frequent movement of the control slide when the lecturer is working. The extension amount of the snap-fit ​​piece 31 is lower than the extension amount of the arc-shaped protrusion 30, thereby avoiding failure of the arc-shaped protrusion 30 to limit the position when the control slide moves. The surface of the arc-shaped protrusion 30 can be set to an arc or inclined surface, so that the arc-shaped protrusion 30 presses the snap-fit ​​structure into the interior of the limiting slide groove 21 as the sensing pressure plate 20 moves downward, and the control slide 1 extends out of the surface of the horizontal bottom plate 3. An embedded handle 14 is embedded at the bottom of the control slide 1 to facilitate the operation of the control slide 1, and a soft bag and an arc surface are provided on the edge of the control slide 1 to reduce damage caused by collision.

[0052] When in use, the "T"-shaped slide rail 13 slides inside the limiting slide groove 21, and the engaging surface 12 and the engaging piece 31 engage with each other, thereby effectively avoiding invalid movement of the control slide plate 1. For example, when the student is naughty, when the control slide plate 1 moves downward under pressure, the "T"-shaped slide rail 13 drives the sensing pressure plate 20 to move downward. Since the bottom of the sensing pressure plate 20 is fitted with an arc-shaped protrusion 30, the engaging mechanism 29 is retracted into the inner wall of the limiting slide groove 21, and then the engaging surface 12 is disengaged from the engaging piece 31, so that the device can only be regulated when the surface is under pressure, such as office supplies or artificial pressure, effectively improving the safety of the device control, and when the pressure is removed, the device can automatically complete the locking of the "T"-shaped slide rail 13 and the driving rotating rod 9, which is extremely reliable.

[0053] Working principle: when giving a lecture, the lecturer needs to stand and give a lecture, so the height of the lecture desk is relatively high. When doing self-study and other supervisory work, the lecturer is mostly sitting, and thus the height of the lecture desk needs to be lowered to facilitate the lecturer's work and supervision of students. By arranging a control slide 1 and a horizontal bottom plate 3 to be stacked on each other, the baffle 2 and the horizontal bottom plate 3 overlap during the lecture and do not occupy too much podium space, which is convenient for the lecturer to move around and write on the blackboard. When the lecturer needs to sit down, the control slide 1 and the horizontal bottom plate 3 can be unfolded, which can greatly expand the desktop space for the lecturer's office. At the same time, the lifting mechanism 5 can be synchronously driven by the driving mechanism to lower the height of the device. The device is simple and convenient to operate, and does not have corresponding electrical and hydraulic components. It is safer and more reliable than in a classroom environment. By controlling the sliding of the slide 1 The movement of the bottom rack 11 drives the movement of the bottom rack 11, and then the engagement of the rack 11 with the first tooth piece realizes the rotation drive of the rotating rod 9, and the lifting mechanism is driven by the rotating rod 9 to adjust the height of the device. As the horizontal bottom plate 3 and the control slide plate 1 slide relative to each other, the control slide plate 1 drives the rotation of the driving rod 9 through the bottom rack 11 and the first tooth piece 10 on the outer end surface of the driving rotating rod 9 while being pulled out, and then the rotating rod 9 drives the rotation of the threaded sleeve 19 through the engagement of the first bevel gear 15 and the second bevel gear 16, so that the threaded sleeve 19 is engaged with the threaded rod 18 to rotate and enter the inside of the threaded sleeve 19, so that the overall height of the device gradually decreases when the sliding plate 17 is gradually retracted into the inside of the bottom plate 4. The device is low, and the height of the device can be controlled by controlling the sliding stroke of the control slide 1. The induction pressure plate 20 is suspended in the middle of the limiting slide groove 21 under the action of the elastic member 23. While supporting the "T"-shaped slide rail 13, the driving rotating rod 9 is pressed by the extension rod 25 to increase the fixing force between the anti-slip member 24 and the driving rotating rod 9, thereby preventing the driving rotating rod 9 from self-rotating and making the device unstable, thereby improving the safety and stability of the device. The horizontal bottom plate 3 and the control slide 1 are bidirectionally limited by the adaptation of the "T"-shaped slide rail 13 and the limiting slide 18, and the moving stroke of the control slide 1 is limited to prevent it from deflecting when sliding. The driving rotating rod 9 is effectively fixed by the engagement of the limiting tooth 27 and the second tooth piece 28, and is effectively prevented by mechanical locking. The rotation of the driving rod 9 causes the device to slide, and further when the surface of the control slide 1 is under pressure, such as when a book is placed in it or when a lecturer sits down, the pressure on the control slide 1 causes the "T"-shaped slide rail 13 to drive the sensing pressure plate 20 to move downward. At this time, the rack 11 is engaged with the first tooth piece 10 to further fix the driving rod 9, and the limiting tooth 27 is disengaged from the second tooth piece 28 as it moves downward, so that the device can control the rotation of the driving rod 9 as the control slide 1 slides, thereby effectively achieving the stability and safety of the structure of the device when no control is required, as well as the smoothness during the control intervention process, avoiding interference with the control of the control slide 1, and sliding the "T"-shaped slide rail 13 inside the limiting slide groove 21, and the clamping surface 12 and the clamping piece 31 are clamped with each other.This effectively avoids the ineffective movement of the control slide 1. For example, when the control slide 1 is pressed down, the "T"-shaped slide rail 13 drives the sensing pressure plate 20 to move down. Since the bottom of the sensing pressure plate 20 is attached with an arc-shaped protrusion 30, the clamping mechanism 29 is retracted into the inner wall of the limit slide groove 21, and then the clamping surface 12 is disengaged from the clamping piece 31, so that the device can only be regulated when the surface is under pressure, such as office supplies or artificial pressure, effectively improving the safety of the device control. When the pressure is removed, the device can automatically complete the locking of the "T"-shaped slide rail 13 and the driving rod 9, which is extremely reliable.

Claims

1. A conveniently adjustable lecture table, comprising a supporting base plate, characterized in that: The upper end surface of the supporting bottom plate is fixedly connected to the horizontal bottom plate, the upper end surface edge of the horizontal bottom plate is fixedly connected to the baffle plate, a lifting mechanism for height adjustment is embedded inside the supporting bottom plate, and a control slide plate for controlling the lifting height of the lifting mechanism is slidably connected to the upper surface of the horizontal bottom plate, and the control slide plate is connected to the lifting mechanism through a driving mechanism; The driving mechanism comprises a driving rotating rod and a rack, the upper end surface of the horizontal bottom plate is provided with a rotating groove, the driving rotating rod is rotatably connected inside the rotating groove, the rack is fixedly connected to the bottom of the control slide plate, and the outer end surface of the driving rotating rod is provided with a first tooth piece adapted to the rack; The lifting mechanism comprises a sliding plate, a threaded rod and a threaded sleeve, wherein the sliding plate is movably sleeved inside the bottom plate, the threaded rod is fixedly connected to the upper end surface of the sliding plate, the threaded sleeve is sleeved on the outer end surface of the threaded rod, the threaded sleeve and the threaded rod are threadedly engaged, and the top of the threaded sleeve is fixedly connected to the inner wall of the bottom plate; The driving rotating rod passes through the horizontal bottom plate and extends to the inside of the bottom plate, and is fixedly connected to the second bevel gear, and the outer end surface of the threaded sleeve is fixedly connected to the first bevel gear meshing with the second bevel gear; The upper end surface of the horizontal bottom plate is fixedly connected to the limited slideway, the bottom of the control slide plate is fixedly connected to a "T"-shaped slide rail adapted to the limited slideway, a limited slide groove is provided inside the limited slideway, an induction pressure plate is elastically embedded inside the limited slide groove through an elastic member, and the upper end surface of the induction pressure plate is in contact with the bottom of the limited slideway; A gap is provided between the rack and the first tooth piece, a limiting groove is provided inside the horizontal bottom plate, the driving rotating rod is arranged through the middle of the limiting groove, an extension rod is slidably connected inside the limiting groove, one end of the extension rod limits the driving rotating rod through an anti-slip member, and one end of the extension rod away from the driving rotating rod is fixedly connected to the bottom of the induction pressure plate; The anti-slip member comprises a limiting tooth and a second tooth piece, wherein the limiting tooth is fixedly connected to the bottom of the side end surface of the extension rod, and the second tooth piece is meshed with the limiting tooth.

2. The easily adjustable lecture table according to claim 1, characterized in that: The inner wall of the limiting slide groove is elastically embedded with a clamping mechanism, and the side end faces of the clamping mechanism are respectively embedded with an arc-shaped protrusion and a clamping piece, the arc-shaped protrusion is in contact with the bottom edge of the induction pressure plate, the clamping piece is arranged on the upper end face of the induction pressure plate, and the edge of the "T"-shaped slide rail is provided with a clamping surface that matches the clamping piece.

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