Platform

Abstract

The utility model provides a platform, which belongs to the technical field of teaching aids and comprises a pedestal, a lower shell, an upper shell, a bearing plate, a rotating frame and a driving mechanism. The lower shell is fixedly mounted on the pedestal; the lower shell is provided with a first mounting cavity and a lifting mechanism, the lower end of the upper shell is supported on the lifting mechanism, and the upper shell is provided with a second mounting cavity; the bearing plate is fixedly mounted on the upper shell; the bearing plate is provided with a connecting hole and a mounting seat, and the rotating frame is rotationally connected to the mounting seat; the display is used for being installed on the rotating frame, and a through hole corresponding to the connecting hole is formed in the rotating frame; the driving mechanism is mounted in the mounting seat, connected with the rotating frame and used for driving the rotating frame to rotate so as to adjust the angle of the display. According to the platform provided by the utility model, the height of the whole platform can be changed, and the use angle of the display can be adjusted, so that the platform is suitable for the height and the teaching habit of a teacher, the teaching difficulty is reduced, and the teaching effect is improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to teaching aid technical field, more specifically, relate to a rostrum. BACKGROUND

[0002] The classroom rostrum is an indispensable part in the teaching environment, usually located at the front end of the classroom, used for teachers to carry out teaching activities. With the development of multimedia technology, the installation and use of host and display are of great significance in the function of the rostrum. At present, the host is usually installed inside the rostrum, and the display is installed on the upper end of the rostrum, which is convenient for teachers to use. However, due to the different height and teaching habits of teachers, the traditional rostrum cannot be adjusted after placing the display, and the height of the rostrum body cannot be adjusted, which leads to great difficulty for teachers to teach and affects the teaching effect. UTILITARY MODEL

[0003] The utility model aims at providing a rostrum to solve the technical problem that the teaching aid in the prior art cannot be adjusted, leading to great difficulty for teachers to teach and affecting the teaching effect.

[0004] To achieve the above-mentioned purpose, the utility model adopts the technical scheme of providing a rostrum, comprising:

[0005] A pedestal is used for being fixedly arranged on the ground;

[0006] A lower shell is fixedly installed on the pedestal; the lower shell is provided with a first installation cavity, and a lifting mechanism is arranged in the first installation cavity;

[0007] An upper shell is installed above the lower shell, and the lower end is supported on the free end of the lifting mechanism; the upper shell is provided with a second installation cavity; the second installation cavity is used for placing a host and a control module;

[0008] A bearing plate is fixedly installed on the upper shell; the bearing plate is provided with a connecting hole in communication with the second installation cavity; the upper end of the bearing plate is provided with a mounting seat, and the mounting seat has the freedom of moving along the width direction of the bearing plate;

[0009] A rotating frame is installed on the mounting seat, and one end of the rotating frame is rotatably connected with the mounting seat; a display is used for being installed on the rotating frame, and the rotating frame is provided with a through hole corresponding to the connecting hole;

[0010] A driving mechanism is installed in the mounting seat and connected with the rotating frame, used for driving the rotating frame to rotate and adjusting the angle of the display.

[0011] In a possible implementation, the lectern further comprises an elastic shielding cylinder between the upper shell and the lower shell, upper and lower ends of the elastic shielding cylinder are fixedly connected to the upper shell and the lower shell respectively, and the elastic shielding cylinder is used for shielding the gap between the upper shell and the lower shell.

[0012] In a possible implementation, an upper end surface of the lower shell is provided with an annular mounting groove arranged around the first mounting cavity, the elastic shielding cylinder is located in the annular mounting groove, and the elastic shielding cylinder is a flexible bellows.

[0013] In a possible implementation, a plurality of guide sleeves arranged vertically are arranged in the first mounting cavity, and a lower end surface of the upper shell is provided with a plurality of guide rods, the guide rods being slidingly connected in the corresponding guide sleeves.

[0014] In a possible implementation, a plurality of partition plates are arranged in the upper shell, the partition plates being used for dividing the second mounting cavity into a plurality of storage areas; and the upper shell is provided with a plurality of switch doors corresponding to the plurality of storage areas.

[0015] In a possible implementation, the mounting seat comprises a bottom plate, two side plates and two vertical plates, the bottom plate being slidingly connected to the bearing plate; the bottom plate is provided with a wire hole, and the driving mechanism is mounted on the bottom plate; the two side plates are fixedly installed on the left and right sides of the bottom plate respectively; the two vertical plates are fixedly installed on the front and back sides of the bottom plate respectively; the vertical plate located on the front side of the bottom plate is provided with a rotating hole; one end of the rotating frame is provided with a rotating shaft connected with the rotating hole, and the height of the vertical plate located on the back side of the bottom plate is greater than the height of the vertical plate located on the front side of the bottom plate; the upper end surfaces of the two side plates and the upper end surfaces of the two vertical plates form an inclined mounting surface for mounting the rotating frame.

[0016] In a possible implementation, the rotating frame is provided with a containing groove for mounting a display, and the through hole is arranged on the groove bottom surface of the containing groove; the vertical plate located on the back side of the bottom plate is provided with an avoiding groove, and the end of the rotating frame away from the rotating shaft is provided with a shielding plate slidingly connected in the avoiding groove.

[0017] In a possible implementation, the vertical plate located on the back side of the bottom plate is an arc-shaped plate, the avoiding groove is an arc-shaped groove, and the shielding plate is an arc-shaped structure matched with the arc-shaped groove.

[0018] In a possible implementation, the bearing plate is provided with a sliding groove and a linear driver fixedly installed in the sliding groove, the lower end of the mounting seat is provided with a sliding block slidingly connected in the sliding groove, and the free end of the linear driver is connected with the sliding block; two elastic cloths are further arranged in the sliding groove, and the two elastic cloths are arranged on the two sides of the sliding block respectively, and the elastic cloths are used for shielding the sliding groove.

[0019] In a possible implementation, the second mounting cavity is provided with a control module connected with the lifting mechanism and the driving mechanism, and the side surface of the upper shell is provided with an operation opening corresponding to the control module.

[0020] The lectern has the advantages that, compared with the prior art, the lectern is fixed on the pedestal by cooperation and installation of the upper shell and the lower shell, the lifting mechanism is installed in the first mounting cavity of the lower shell, the display is installed on the rotating frame, and the host and the control module are installed in the second mounting cavity of the upper shell. During use, the teacher controls the upper shell to move up and down along the vertical direction by means of the driving mechanism, so that the height of the display is changed to adapt to the height of the teacher; then the driving mechanism is started to control the rotating frame to rotate on the bearing plate, so that the display is angle-adjusted relative to the bearing plate, to adapt to the habit of the teacher during teaching and clearly watch the content on the display. In this way, the height of the entire lectern can be changed, and the use angle of the display can be adjusted to adapt to the height and teaching habit of the teacher, thereby reducing the teaching difficulty and improving the teaching effect. BRIEF DESCRIPTION OF DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0022] Figure 1 The internal structure of the lectern provided by the embodiments of the present application Figure 1 ;

[0023] Figure 2 The top view of the lectern provided by the embodiments of the present application

[0024] Figure 3 The internal structure of the lectern provided by the embodiments of the present application Figure 2 ;

[0025] Figure 4The utility model provides a connection schematic view of upper shell, lifting mechanism, elastic shielding cylinder and lower shell provided by the utility model embodiment.

[0026] Figure 5 The utility model provides a structure schematic view of mounting seat provided by the utility model embodiment.

[0027] Figure 6 The utility model provides a connection schematic view of bearing plate and mounting seat provided by the utility model embodiment.

[0028] Figure 7 The utility model provides a structure schematic view of platform with switch door.

[0029] Among them, the reference numeral in the drawing is:

[0030] 1, pedestal, 2, lower shell, 21, first installation cavity, 22, lifting mechanism, 23, elastic shielding cylinder, 24, annular installation groove, 25, guide sleeve, 3, upper shell, 31, second installation cavity, 32, guide rod, 33, partition, 34, switch door, 35, ventilation hole, 36, operation opening, 4, bearing plate, 41, mounting seat, 42, connecting hole, 43, bottom plate, 44, side plate, 45, vertical plate, 46, wire hole, 47, rotation hole, 48, avoiding groove, 49, sliding slot, 5, rotating frame, 51, containing groove, 52, through hole, 53, rotating shaft, 54, shielding plate, 55, linear drive, 56, sliding block, 57, stretch cloth, 6, drive mechanism, 7, control module, 8, main machine. DETAILED DESCRIPTION

[0031] In order to make the technical problem, technical scheme and beneficial effect that the utility model wants to solve more clearly, the following is in conjunction with the drawing and embodiment, and the utility model is further detailedly explained.It should be understood that the specific embodiment described here is only used to explain the utility model, and is not used to limit the utility model.

[0032] It should be noted that when an element is referred to as "fixed to" or "set to" another element, it can be directly on another element or indirectly on the other element.When an element is referred to as "connected to" another element, it can be directly connected to another element or indirectly connected to the other element.

[0033] It should be understood that the terms "length", "width", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0034] In addition, the terms "first", "second" are only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise specifically limited.

[0035] Please refer to Figures 1 to 7 The present application provides a lectern. The lectern comprises a pedestal 1, a lower shell 2, an upper shell 3, a bearing plate 4, a rotating frame 5 and a driving mechanism 6. The pedestal 1 is used to be fixed on the ground. The lower shell 2 is fixedly installed on the pedestal 1. The lower shell 2 is provided with a first installation cavity 21, and a lifting mechanism 22 is arranged in the first installation cavity 21. The upper shell 3 is installed above the lower shell 2, and the lower end is supported on the free end of the lifting mechanism 22. The upper shell 3 is provided with a second installation cavity 31. The second installation cavity 31 is used to place a main machine 8 and a control module 7. The bearing plate 4 is fixedly installed on the upper shell 3. The bearing plate 4 is provided with a connecting hole 42 which is in communication with the second installation cavity 31. The upper end of the bearing plate 4 is provided with a mounting seat 41, and the mounting seat 41 has the freedom of moving along the width direction of the bearing plate 4. The rotating frame 5 is installed on the mounting seat 41, and one end of the rotating frame 5 is rotatably connected with the mounting seat 41. A display is used to be installed on the rotating frame 5. The rotating frame 5 is provided with a through hole 52 corresponding to the connecting hole 42. The driving mechanism 6 is installed in the mounting seat 41 and connected with the rotating frame 5, and is used to drive the rotating frame 5 to rotate to adjust the angle of the display.

[0036] The lectern provided by the utility model is compared with prior art, the upper shell 3 and the lower shell 2 are cooperatively installed and fixed on the pedestal 1, the lifting mechanism 22 is installed in the first installation cavity 21 of the lower shell 2, the display is installed on the rotating frame 5, and the host computer 8 and the control module 7 are installed in the second installation cavity 31 of the upper shell 3. When in use, the teacher controls the upper shell 3 to move up and down along the vertical direction by means of the driving mechanism 6, so that the height of the display is changed to adapt to the height of the teacher; then the driving mechanism 6 is started to control the rotating frame 5 to rotate on the bearing plate 4, so that the display is angularly adjusted relative to the bearing plate 4 to adapt to the habit of the teacher when teaching and clearly watch the content on the display. In this way, the height of the whole lectern can be changed, and the use angle of the display can be adjusted to adapt to the height and teaching habit of the teacher, so that the teaching difficulty is reduced, and the teaching effect is improved.

[0037] Please refer to Figure 1 、 Figure 3 and Figure 4 , as a specific embodiment of the lectern provided by the utility model, the lectern further comprises an elastic shielding cylinder 23 located between the upper shell 3 and the lower shell 2, the upper and lower ends of the elastic shielding cylinder 23 are fixedly connected with the upper shell 3 and the lower shell 2 respectively, and the elastic shielding cylinder 23 is used for shielding the gap between the upper shell 3 and the lower shell 2; when the upper shell 3 moves upward relative to the lower shell 2, the elastic shielding cylinder 23 is elongated and deformed, so as to perfectly shield the gap between the upper shell 3 and the lower shell 2. By means of the elastic shielding cylinder 23, foreign matters and the like can be prevented from entering the inside of the lectern, and the purpose of small noise can be achieved. At the same time, by means of the elastic shielding cylinder 23, the students below the lectern can be effectively prevented from watching the lifting mechanism 22 and the like in the inside of the lower shell 2, so as to ensure the students to concentrate on learning. The elastic shielding cylinder 23 is detachably connected with the upper shell 3 and the lower shell 2, so that the inside of the lower shell 2 can be maintained and the like by means of detaching the elastic shielding cylinder 23.

[0038] The upper shell 3 is provided with a ventilation hole 35 for heat dissipation of the host computer 8 and the like.

[0039] Please refer to Figure 1 、 Figure 3 and Figure 4, as a specific embodiment of the podium provided by the utility model, the upper end face of lower shell 2 is equipped with annular installation groove 24 arranged around first installation cavity 21, and elastic shielding cylinder 23 is located in annular installation groove 24, and elastic shielding cylinder 23 is flexible bellows; annular installation groove 24 is used to place elastic shielding cylinder 23, so that when upper shell 3 is butt-jointed on lower shell 2, elastic shielding cylinder 23 is completely located in annular installation groove 24. The upper end of elastic shielding cylinder 23 is pulled out of annular installation groove 24 by starting lifting mechanism 22 acting on upper shell 3, so that the gap can be always shielded. The lower end of elastic shielding cylinder 23 is installed into the bottom of annular installation groove 24, and the upper end is installed on the lower end face of upper shell 3 through bolts, so that upper shell 3 and lower shell 2 are stably butt-jointed together. The bolts also make elastic shielding cylinder 23 detachable from upper shell 3. Preferably, elastic shielding cylinder 23 is flexible bellows, the upper end of the flexible bellows is connected to the lower end of upper shell 3, and the lower end of the flexible bellows is fixedly installed into annular installation groove 24.

[0040] Please refer to Figure 4 , as a specific embodiment of the podium provided by the utility model, a plurality of guide sleeves 25 arranged vertically are arranged in first installation cavity 21, and the lower end face of upper shell 3 is equipped with a plurality of guide rods 32, which are slidingly connected in the corresponding guide sleeves 25; that is, after starting lifting mechanism 22, upper shell 3 moves upward, guide rods 32 move up and down in guide sleeves 25, and the cooperation of guide sleeves 25 and guide rods 32 makes the relative movement between upper shell 3 and lower shell 2 more accurate.

[0041] Please refer to Figure 1 and Figure 3 , as a specific embodiment of the podium provided by the utility model, a plurality of partition plates 33 are arranged in upper shell 3, and the partition plates 33 are used to divide second installation cavity 31 into a plurality of storage areas; a plurality of switch doors 34 corresponding to the plurality of storage areas are arranged on upper shell 3; second installation cavity 31 is divided into a plurality of storage areas by partition plates 33, and the storage areas can be used to place teachers' books, water cups and other personal items. At the same time, the plurality of storage areas are closed by switch doors 34, and door locks can be arranged on switch doors 34 to improve safety.

[0042] Please refer to Figures 1 to 3 、 Figures 5 to 7, as a specific embodiment of the lectern provided by the utility model, the mounting seat 41 includes the bottom plate 43, two side plates 44 and two vertical plates 45, the bottom plate 43 is slidably connected to the bearing plate 4; the bottom plate 43 is provided with a wire passing hole 46, and the driving mechanism 6 is installed on the bottom plate 43; the two side plates 44 are respectively fixedly installed on the left and right sides of the bottom plate 43; the two vertical plates 45 are respectively fixedly installed on the front and back sides of the bottom plate 43; the vertical plate 45 located on the front side of the bottom plate 43 is provided with a rotating hole 47; one end of the rotating frame 5 is provided with a rotating shaft 53 connected with the rotating hole 47, and the height of the vertical plate 45 located on the back side of the bottom plate 43 is greater than the height of the vertical plate 45 located on the front side of the bottom plate 43; the upper end faces of the two side plates 44 and the upper end faces of the two vertical plates 45 form an inclined mounting surface for installing the rotating frame 5; the bottom plate 43, the two side plates 44 and the two vertical plates 45 enclose the mounting seat 41 with an open upper end, and the height difference between the two vertical plates 45 is provided, and the upper end faces of the two side plates 44 are arranged obliquely, so as to form an inclined mounting surface for the rotating frame 5 at the upper end of the mounting seat 41. Among them, the rotating shaft 53 on the rotating frame 5 is rotatably connected to the rotating hole 47 of the vertical plate 45 close to the front side of the bottom plate 43, so that the rotating frame 5 can move close to or away from the inclined mounting surface. And the wire passing hole 46 is opened on the bottom plate 43, so that after the display and the rotating frame 5 are installed on the mounting seat 41, the connecting line of the display can be connected with the host 8 and the like through the wire passing hole 46 and the like.

[0043] Please refer to Figure 3 , Figure 5 and Figure 6 , as a specific embodiment of the lectern provided by the utility model, the rotating frame 5 is provided with a containing groove 51 for installing the display, and a through hole 52 is opened on the groove bottom surface of the containing groove 51; the vertical plate 45 located on the back side of the bottom plate 43 is provided with an avoiding groove 48, and the end of the rotating frame 5 away from the rotating shaft 53 is provided with a shielding plate 54 slidably connected in the avoiding groove 48; the containing groove 51 is opened on the rotating frame 5, so that the display is stably installed in the containing groove 51. At the same time, the through hole 52 is arranged on the groove bottom surface of the containing groove 51, and the through hole 52 corresponds to the wire passing hole 46, so as to facilitate the connection between the host 8 and the display. At the same time, the shielding plate 54 is arranged on the end of the rotating frame 5 away from the rotating shaft 53, and the avoiding groove 48 is opened on the vertical plate 45 of the mounting seat 41, and in the process of rotating the rotating frame 5, the shielding plate 54 slides in the avoiding groove 48, so that the inside of the mounting seat 41 can be shielded by means of the shielding plate 54.

[0044] Please refer to Figure 3 , Figure 5 and Figure 6As a specific embodiment of the podium provided by the utility model, the vertical plate 45 at the back side of the bottom plate 43 is an arc-shaped plate, the avoiding groove 48 is an arc-shaped groove, and the shielding plate 54 is an arc-shaped structure matched with the arc-shaped groove.

[0045] Please refer to Figure 3 and Figure 6 As a specific embodiment of the podium provided by the utility model, the bearing plate 4 is provided with a sliding groove 49 and a linear driver 55 fixedly installed in the sliding groove 49, the lower end of the mounting seat 41 is provided with a sliding block 56 slidingly connected in the sliding groove 49, and the free end of the linear driver 55 is connected with the sliding block 56; two stretchable cloths 57 are further arranged in the sliding groove 49, and the two stretchable cloths 57 are respectively installed on the two sides of the sliding block 56, and the stretchable cloth 57 is used for shielding the sliding groove 49; the linear driver 55 and the sliding block 56 are arranged along the width direction of the bearing plate 4 and installed in the sliding groove 49. During installation, the mounting seat 41 is fixedly installed on the sliding block 56, and after the linear driver 55 is started, the sliding block 56 is driven to move while the mounting seat 41 is driven to move on the bearing plate 4. The linear driver 55 can be an electric push rod. The number of the sliding blocks 56 is two, and a connecting rod is fixedly arranged between the two sliding blocks 56. The stretchable cloth 57 is arranged at the top of the sliding groove 49, the stretchable cloth 57 is aligned with the upper end surface of the bearing plate 4, and the stretchable cloth 57 is arranged in two, and is respectively located between the two ends of the sliding block 56 and the two ends of the sliding groove 49; thus, during the movement of the sliding block 56, the stretchable cloth 57 is stretched and contracted, and the sliding groove 49 can be always closed.

[0046] Please refer to Figure 1 and Figure 7 As a specific embodiment of the podium provided by the utility model, the second mounting cavity 31 is provided with a control module 7 connected with the lifting mechanism 22 and the driving mechanism 6, and the side surface of the upper shell 3 is provided with an operation opening 36 corresponding to the control module 7; in this way, the teacher or other staff can directly control the control module 7 through the operation opening 36 without opening the upper shell 3. A fingerprint lock or the like can be arranged on the control module 7, so that the finger passes through the operation opening 36 and is attached to the fingerprint lock, realizing the effect of quick opening or closing. Meanwhile, the parameters such as height and habit of different teachers are arranged in the control module 7, so that the podium can be directly adjusted to the set parameters of the teacher.

[0047] The above is only a preferred embodiment of the utility model, and is not used to limit the utility model, and any modification, equivalent replacement and improvement within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A lectern, characterized in that, The podium comprises: a pedestal for being fixed on the ground; a lower shell fixedly installed on the pedestal; the lower shell is provided with a first installation cavity, and the first installation cavity is provided with a lifting mechanism; an upper shell installed above the lower shell and supported at the free end of the lifting mechanism; the upper shell is provided with a second installation cavity for placing a main machine and a control module; a bearing plate fixedly installed on the upper shell; the bearing plate is provided with a connecting hole communicated with the second installation cavity; the upper end of the bearing plate is provided with a mounting seat, and the mounting seat has a freedom of movement along the width direction of the bearing plate; a rotating frame installed on the mounting seat, and one end of the rotating frame is rotatably connected with the mounting seat; a display installed on the rotating frame, and the rotating frame is provided with a through hole corresponding to the connecting hole; a driving mechanism installed in the mounting seat and connected with the rotating frame for driving the rotating frame to rotate to adjust the angle of the display.

2. The lectern of claim 1, wherein The podium further comprises an elastic shielding cylinder between the upper shell and the lower shell, the upper and lower ends of the elastic shielding cylinder are fixedly connected with the upper shell and the lower shell respectively, and the elastic shielding cylinder is used for shielding the gap between the upper shell and the lower shell.

3. The lectern of claim 2, wherein, The upper end surface of the lower shell is provided with an annular installation groove arranged around the first installation cavity, the elastic shielding cylinder is located in the annular installation groove, and the elastic shielding cylinder is a flexible bellows.

4. The lectern of claim 1, wherein The first installation cavity is provided with a plurality of vertically arranged guide sleeves, and the lower end surface of the upper shell is provided with a plurality of guide rods which are slidingly connected in the corresponding guide sleeves.

5. The lectern of claim 1, wherein The upper shell is provided with a plurality of switch doors corresponding to a plurality of storage areas.

6. The lectern of claim 1, wherein The mounting seat comprises a bottom plate, two side plates and two vertical plates, the bottom plate is slidingly connected with the bearing plate, the bottom plate is provided with a wire hole, and the driving mechanism is installed on the bottom plate, the two side plates are fixedly installed on the left and right sides of the bottom plate, the two vertical plates are fixedly installed on the front and back sides of the bottom plate, the vertical plate located on the front side of the bottom plate is provided with a rotating hole, one end of the rotating frame is provided with a rotating shaft connected with the rotating hole, the height of the vertical plate located on the back side of the bottom plate is greater than that of the vertical plate located on the front side of the bottom plate, and the upper end surfaces of the two side plates and the two vertical plates form an inclined mounting surface for mounting the rotating frame.

7. The lectern of claim 6, wherein The rotating frame is provided with a containing groove for mounting the display, and the through hole is formed on the groove bottom surface of the containing groove, the vertical plate located on the back side of the bottom plate is provided with an avoiding groove, and one end of the rotating frame away from the rotating shaft is provided with a shielding plate slidingly connected in the avoiding groove.

8. The lectern of claim 7, wherein, The vertical plate located on the back side of the bottom plate is an arc-shaped plate, the avoiding groove is an arc-shaped groove, and the shielding plate is an arc-shaped structure matched with the arc-shaped groove.

9. The lectern of claim 1, wherein The bearing plate is provided with a sliding groove and a linear driver fixedly installed in the sliding groove, the lower end of the mounting seat is provided with a sliding block slidingly connected in the sliding groove, and the free end of the linear driver is connected with the sliding block; two stretchable cloths are further arranged in the sliding groove, and the two stretchable cloths are respectively arranged on the two sides of the sliding block, and the stretchable cloths are used for shielding the sliding groove.

10. A lectern as claimed in any one of claims 1 to 9, wherein, The second mounting cavity is provided with a control module connected with the lifting mechanism and the driving mechanism, and the side surface of the upper shell is provided with an operation opening corresponding to the control module.

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