Teaching demonstration combined screen for students

Abstract

The invention relates to the technical field of screen structures, in particular to a teaching demonstration combined screen for students, which comprises a combined screen composed of a plurality of coplanar panel structures. The panel structure comprises a square screen, a round screen and a back plate, a round hole is formed in the middle of the square screen, the round screen is located in the round hole, the square screen and the round screen are coplanar, the back plate and the square screen are distributed front and back, the back plate is used for being fixed to a wall and supporting the square screen, and connecting columns are sequentially arranged between the round screen and the back plate; by the adoption of the mode that the square screen and the round screen are combined, the panel structure can be disassembled and assembled more easily and conveniently and can be assembled and disassembled only by pressing and rotating, extra tools are not needed, and the technical threshold of maintenance is lowered.

Description

Technical Field

[0001] The invention relates to the technical field of screen structures, in particular to a teaching demonstration combined screen for students. Background Art

[0002] With the continuous development of educational technology, the traditional teaching method of blackboard and chalk has gradually been replaced by more modern teaching methods. Especially in the context of the information age, the development of multimedia technology and the Internet has brought unprecedented opportunities for education and teaching. During the learning process, students can acquire knowledge faster, more accurately and more vividly through multimedia screens such as video walls and LED displays. These modern teaching tools not only improve teaching efficiency, but also enhance students' sense of participation and learning experience.

[0003] However, with the widespread application of these devices, their maintenance and inspection have become particularly important, especially in school environments with high frequency of use and changeable environments. Common multimedia screens are large combined screens composed of multiple modules or panels. When a panel is damaged, it needs to be removed and replaced with a new one. Since the panels are assembled by inserting a ridge on the edge of a panel into a slot on the edge of an adjacent panel, a large prying force needs to be provided to the panel when the panel is removed to separate it from other panels. This can easily cause the panel to bend and be damaged, and it is difficult to disassemble and assemble, making the operation inconvenient. Summary of the invention

[0004] In order to solve the above technical problems, the present invention provides a teaching demonstration combined screen for students, and the specific technical solution adopted is:

[0005] A teaching demonstration combined screen for students, the combined screen consisting of a plurality of coplanar panel structures;

[0006] The panel structure includes a square screen, a round screen and a back plate. A round hole is provided in the middle of the square screen. The round screen is located in the round hole, and the square screen and the round screen are coplanar. The back plate and the square screen are distributed front to back, and the back plate is used to be fixed on the wall. The back plate supports the square screen. A connecting column, a first chuck, a first spring, a connecting cylinder, a second chuck, a threaded tube and a threaded rod are sequentially arranged between the round screen and the back plate. One end of the connecting column is fixed on the round screen. The first chuck and the second chuck are both located on the inner side of the connecting cylinder. A card groove and a protrusion that cooperate with each other are arranged on the end surface of the first chuck and the end surface of the second chuck. The first chuck is connected to the second chuck by a first spring. The other end of the connecting column is slidably inserted into the connecting cylinder and fixedly connected to the first chuck. One end of the threaded tube is slidably inserted into the connecting cylinder and connected to the second chuck. The threaded rod is screwed into the other end of the threaded tube, and the threaded rod is fixed to the back plate.

[0007] Among them, a guide structure is arranged between the square screen and the back plate, and the guide structure is fixedly connected to the connecting tube. When the threaded tube is separated from the threaded rod, the guide structure is disassembled, and the square screen is separated from the back plate.

[0008] Furthermore, a square block is fixed between the connecting column and the first chuck, and a square barrel is connected to the end of the connecting tube facing the round screen, and the square block is slidably located in the square barrel;

[0009] A prism is arranged in the middle of the second chuck, the prism is located inside the first spring, and the end of the prism passes through the first chuck and the block and is slidably inserted into the connecting column.

[0010] Furthermore, the guide structure includes two side rods fixed on the outer wall of the connecting tube, the two side rods are collinear and opposite in direction, a guide sleeve is fixed on each side rod, the length direction of the guide sleeve is along the vertical connection direction of the square screen and the back plate, one end of the guide sleeve is fixed on the square screen, and the other end of the guide sleeve is slidably inserted with a guide rod, and the guide rod is fixed on the back plate.

[0011] Furthermore, the communication position between the square barrel and the connecting tube is set as a conical surface.

[0012] Furthermore, an electromagnetic propeller is rolled on the side rod, and a clamping plate is provided at the output end of the electromagnetic propeller. The clamping plate passes through the connecting tube and slides into and is inserted between the first chuck and the second chuck.

[0013] Furthermore, a rotating column is rotatably inserted on the connecting column, the axis of the rotating column is perpendicular to the axis of the connecting column, side plates are fixed at both ends of the rotating column, a hand rod is connected between the two side plates, and the hand rod is far away from the connecting column.

[0014] Furthermore, a first limiting piece is obliquely fixed on the outer wall of the connecting column, the first limiting piece is connected to the rotating column via a spring sheet, and a second limiting piece is arranged on the outer wall of the rotating column.

[0015] Furthermore, each of the side panels is rotatably provided with a rubber wheel, the rubber wheel is coaxial with the hand lever, and the rubber wheel contacts the back side of the square screen.

[0016] Furthermore, four corners of the back of each square screen are provided with plug posts;

[0017] A sleeve is rolled on the back plate, a movable rod is slidably inserted in the sleeve, a second spring is arranged between the sleeve and the movable rod, a top pressure plate is arranged at the end of the movable rod, and four insertion holes are opened on the top pressure plate;

[0018] The top pressure plate is aligned with the contact points of four adjacent square screens, and the four insertion holes on the top pressure plate are used in conjunction with the four insertion columns at the contact points of the four adjacent square screens.

[0019] Furthermore, a positioning plate is slidably provided on the side wall of each guide rod, and the positioning plate is used to limit the position of the guide sleeve on the guide rod, and the positioning plate is fixed to the guide rod by a locking bolt.

[0020] The advantages of the present invention are:

[0021] By adopting the combination of square screen and round screen, the disassembly and installation of the panel structure can be made easier, which can be completed by pressing and rotating without additional tools, thus lowering the technical threshold for maintenance. Compared with the traditional method that may cause bending or other forms of damage to the panel when disassembling the panel, in this case, no interaction force will be generated between the two adjacent groups of panel structures, and when the panel structure is disassembled, it moves horizontally, and other panel structures will not interfere with the disassembled panel structure. Therefore, this structural method can reduce the difficulty of disassembly and assembly, facilitate the protection of the panel structure, and reduce the damage to the panel structure during disassembly and assembly. Due to the simplification of the disassembly and assembly process, workers can complete the replacement work in a shorter time, thus improving the maintenance efficiency. This case has a simple structure and is easy to operate, and the various components can maintain a stable connection in a natural state, and can be easily separated when disassembly is required. In summary, this design not only simplifies the maintenance process of the teaching demonstration combination screen, but also improves the safety and efficiency of maintenance work. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0023] Figure 1 It is a schematic diagram of the structure of the present invention;

[0024] Figure 2 yes Figure 1 A schematic diagram of the enlarged structure of the middle panel structure;

[0025] Figure 3 yes Figure 2 Left view structural diagram;

[0026] Figure 4 yes Figure 3 Schematic diagram of explosion structure;

[0027] Figure 5 yes Figure 4 A schematic diagram of the enlarged structure of the middle back plate;

[0028] Figure 6 yes Figure 4An enlarged schematic diagram of the middle connecting tube and the structure thereon;

[0029] Figure 7 yes Figure 6 Schematic diagram of the cross-section structure;

[0030] Figure 8 yes Figure 6 Schematic diagram of explosion structure;

[0031] Markings in the accompanying drawings:

[0032] 1. Panel structure; 2. Square screen; 3. Round screen; 4. Back plate; 5. Connecting column; 6. First chuck; 7. First spring; 8. Connecting tube; 9. Second chuck; 10. Threaded tube; 11. Threaded rod; 12. Block; 13. Square barrel; 14. Prism; 15. Side rod; 16. Guide sleeve; 17. Guide rod; 18. Conical surface; 19. Electromagnetic thruster; 20. Card plate; 21. Rotating column; 22. Side plate; 23. Hand lever; 24. First limit plate; 25. Spring piece; 26. Second limit plate; 27. Rubber wheel; 28. Insert column; 29. ​​Sleeve; 30. Movable rod; 31. Second spring; 32. Top pressure plate; 33. Socket; 34. Positioning plate; 35. Locking bolt. DETAILED DESCRIPTION

[0033] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0034] In the description of the present invention, it should be noted that the orientations or positional relationships indicated by “center”, “up”, “down”, “left”, “right”, “vertical”, “horizontal”, “inside” and “outside”, etc., are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0035] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. This embodiment is written in a progressive manner.

[0036] like Figures 1 to 8As shown, a teaching demonstration combined screen for students of the present invention is composed of a plurality of coplanar panel structures 1;

[0037] The panel structure 1 includes a square screen 2, a round screen 3 and a back plate 4. A round hole is provided in the middle of the square screen 2. The round screen 3 is located in the round hole. The square screen 2 and the round screen 3 are coplanar. The back plate 4 and the square screen 2 are distributed front and back. The back plate 4 is used to be fixed on the wall. The back plate 4 supports the square screen 2. A connecting column 5, a first chuck 6, a first spring 7, a connecting tube 8, a second chuck 9, a threaded tube 10 and a threaded rod 11 are sequentially arranged between the round screen 3 and the back plate 4. One end of the connecting column 5 is fixed on the round screen 3. The first chuck 6 The first chuck 6 and the second chuck 9 are both located inside the connecting tube 8, and the end surfaces of the first chuck 6 and the second chuck 9 are both provided with grooves and protrusions used in cooperation with each other, the first chuck 6 and the second chuck 9 are connected by a first spring 7, the other end of the connecting column 5 is slidably inserted into the connecting tube 8 and fixedly connected to the first chuck 6, one end of the threaded tube 10 is slidably inserted into the connecting tube 8 and connected to the second chuck 9, the threaded rod 11 is screwed into the other end of the threaded tube 10, and the threaded rod 11 is fixed on the back plate 4;

[0038] A guide structure is provided between the square screen 2 and the back plate 4 , and the guide structure is fixedly connected to the connecting tube 8 . When the threaded tube 10 is separated from the threaded rod 11 , the guide structure is disassembled, and the square screen 2 is separated from the back plate 4 .

[0039] In detail, the back plate 4 can support and fix the square screen 2 through the guide structure. Since the connecting tube 8 is connected to the guide structure, the back plate 4 can support the circular screen 3 synchronously. The first chuck 6 and the second chuck 9 are both located in the connecting tube 8, and the two end surfaces of the connecting tube 8 can limit the first chuck 6 and the second chuck 9, so that the first chuck 6 and the second chuck 9 can only move in the internal area of ​​the connecting tube 8. The first spring 7 provides an elastic thrust for the first chuck 6 and the second chuck 9, so that in the natural state, the first chuck 6 and the second chuck 9 are separated, and the first chuck 6 is connected to the circular screen 3 through the connecting column 5. Due to the action of the first spring 7 and the screwed connection relationship between the threaded tube 10 and the threaded rod 11, the square screen 2 and the circular screen 3 can be fixed on the back plate 4 in the natural state.

[0040] When the panel structure 1 is damaged, the worker only needs to press the circular screen 3 inwards so that the circular screen 3 pushes the connecting column 5 and the first chuck 6 to move, so that the first chuck 6 and the second chuck 9 can be buckled and connected with each other through the grooves and protrusions thereon. At this time, the first spring 7 is in an elastic deformation state, and then the circular screen 3 is rotated, and the circular screen 3 will drive the connecting column 5, the first chuck 6, the first spring 7, the second chuck 9 and the threaded tube 10 to rotate synchronously. Since the threaded tube 10 is threadedly connected to the threaded rod 11, as the threaded tube 10 rotates, it gradually moves away from the back plate 4 until the threaded tube 10 is separated from the threaded rod 11. In this process, the threaded tube 10 will move away from the back plate 4 synchronously with the second chuck 9, the connecting tube 8, the first spring 7, the first chuck 6, the connecting column 5 and the circular screen 3, and the connecting column 5 will be connected to the first chuck 9, the first spring 7, the first chuck 6, the connecting column 5 and the circular screen 3. The connecting tube 8 will drive the guide structure and the screen 2 above it to move synchronously until the guide structure is disassembled and the square screen 2 is separated from the back plate 4. At this time, the square screen 2 and the round screen 3 are disassembled. The new square screen 2 and the round screen 3 are reversely installed on the back plate 4 in the above manner to complete the replacement of the panel structure 1. The structural method is simple. It only needs to press and rotate the round screen 3 to complete the disassembly of the panel structure 1. Therefore, no other tools are required. Complete manual disassembly and assembly can be achieved, simplifying the operation method. In addition, when the square screen 2 and the round screen 3 on the panel structure 1 are separated from other panel structures 1, they can be smoothly moved horizontally to the outside of the combined screen without interfering with other panel structures 1. Therefore, the difficulty of disassembly and assembly is greatly reduced, which is convenient for protecting the panel structure 1.

[0041] By adopting the combination of square screen 2 and round screen 3, the disassembly and installation of panel structure 1 can be made easier, which can be completed by pressing and rotating without additional tools, thus lowering the technical threshold for maintenance. Compared with the traditional method that may cause bending or other forms of damage to the panel when disassembling the panel, in this case, no interaction force will be generated between the two adjacent groups of panel structures 1, and when the panel structure 1 is disassembled, it moves horizontally, and other panel structures 1 will not interfere with the disassembled panel structure 1. Therefore, this structural method can reduce the difficulty of disassembly and assembly, facilitate the protection of the panel structure 1, and reduce the damage to the panel structure 1 during the disassembly and assembly process. Due to the simplification of the disassembly and assembly process, workers can complete the replacement work in a shorter time, thus improving the maintenance efficiency. This case has a simple structure and is easy to operate, and the various components can maintain a stable connection in a natural state, and can be easily separated when disassembly is required. In summary, this design not only simplifies the maintenance process of the teaching demonstration combination screen, but also improves the safety and efficiency of the maintenance work.

[0042] like Figures 7 and 8 As shown, a block 12 is fixed between the connecting column 5 and the first chuck 6, and a square barrel 13 is connected to the end of the connecting tube 8 facing the round screen 3, and the block 12 is slidably located in the square barrel 13;

[0043] A prism 14 is provided in the middle of the second chuck 9 , the prism 14 is located inside the first spring 7 , and the end of the prism 14 passes through the first chuck 6 and the block 12 and is slidably inserted into the connecting column 5 .

[0044] In detail, in the natural state, due to the action of the first spring 7, the block 12 stays in the square barrel 13. At this time, the square barrel 13 can be used to limit the rotation and position of the block 12, that is, the rotation and position of the connecting column 5 and the circular screen 3 are limited, so that the circular screen 3 cannot be rotated at will, achieving the effect of locking and locking. When the circular screen 3 is pressed, the block 12 moves from the square barrel 13 into the connecting tube 8, and the square barrel 13 stops limiting the block 12.

[0045] The prism 14 can guide the second chuck 9 and the first chuck 6, so that they can be smoothly engaged with each other and the misalignment of teeth can be avoided.

[0046] It should be pointed out that when the block 12 moves into the connecting tube 8, the side wall of the block 12 facing the circular screen 3 will remain in contact with the inner wall of the end face of the connecting tube 8, that is, the end of the connecting tube 8 limits the block 12. At this time, the first chuck 6 and the second chuck 9 are engaged with each other, so that when the threaded tube 10 moves, it will push the connecting tube 8 to move synchronously through the block 12.

[0047] like Figures 4 to 5 As shown, the guide structure includes two side rods 15 fixed on the outer wall of the connecting tube 8, the two side rods 15 are collinear and opposite in direction, a guide sleeve 16 is fixed on each side rod 15, the length direction of the guide sleeve 16 is along the vertical connection direction of the square screen 2 and the back plate 4, one end of the guide sleeve 16 is fixed on the square screen 2, and the other end of the guide sleeve 16 is slidably inserted with a guide rod 17, and the guide rod 17 is fixed on the back plate 4.

[0048] In detail, the guide sleeve 16 and the guide rod 17 can play a guiding and supporting role for the square screen 2, and the side rod 15 can be used to synchronously support the connecting tube 8. When the threaded tube 10 moves on the threaded rod 11, the threaded tube 10 will push the connecting tube 8 to move synchronously, and the connecting tube 8 drives the square screen 2 to move synchronously through the guide sleeve 16, thereby making the square screen 2 and the round screen 3 move away from the back plate 4 at the same time and realize the disassembly work, the guide sleeve 16 slides on the guide rod 17, when the guide sleeve 16 and the guide rod 17 are separated, the threaded tube 10 is separated from the threaded rod 11, and the square screen 2 and the round screen 3 are removed.

[0049] like Figure 8 As shown, the communication position between the square barrel 13 and the connecting tube 8 is set as a conical surface 18.

[0050] In detail, by setting the connection position between the connecting tube 8 and the square barrel 13 to the conical surface 18, the block 12 can be more conveniently slid into the square barrel 13, thereby facilitating the rapid assembly of the block 12 and the square barrel 13 and reducing the assembly difficulty and precision requirements.

[0051] like Figure 8 As shown, an electromagnetic propeller 19 is rolled on the side rod 15 , and a clamping plate 20 is provided at the output end of the electromagnetic propeller 19 . The clamping plate 20 passes through the connecting tube 8 and slides into and is inserted between the first chuck 6 and the second chuck 9 .

[0052] In detail, in the natural state, the electromagnetic propeller 19 is energized and is in an extended state. At this time, the electromagnetic propeller 19 pushes the card plate 20 to move between the first chuck 6 and the second chuck 9. The card plate 20 limits the position of the first chuck 6, so that the block 12 cannot be moved out of the square barrel 13, so that the circular screen 3 cannot be rotated and moved, and the position of the circular screen 3 is locked. When the square screen 2 and the circular screen 3 need to be disassembled, the worker only needs to control the current flow in the electromagnetic propeller 19 to shrink the electromagnetic propeller 19 and move the card plate 20 away from the first chuck 6 and the second chuck 9, so that the circular screen 3 can move forward.

[0053] The above structure can achieve an anti-theft effect and prevent the square screen 2 and the round screen 3 from being disassembled at will.

[0054] like Figure 7 As shown, a rotating column 21 is rotatably inserted into the connecting column 5, and the axis of the rotating column 21 is perpendicular to the axis of the connecting column 5. Side plates 22 are fixed at both ends of the rotating column 21, and a hand lever 23 is connected between the two side plates 22, and the hand lever 23 is away from the connecting column 5.

[0055] In detail, when the circular screen 3 is pushed to move, a gap is generated between the circular screen 3 and the square screen 2. At this time, the hand lever 23 rotates to between the square screen 2 and the circular screen 3 based on the rotating column 21. The worker can directly operate the hand lever 23 and rotate it, so that the circular screen 3 rotates. This method can provide an operating position for the worker, avoid the disadvantage that the worker cannot effectively operate the circular screen 3 when the circular screen 3 is directly rotated, and facilitate the protection of the circular screen 3.

[0056] In the natural state, the square screen 2 and the round screen 3 are coplanar, the hand lever 23 can be hidden at the back of the square screen 2 , and the side panel 22 supports the hand lever 23 .

[0057] like Figure 7 As shown, a first limiting piece 24 is obliquely fixed on the outer wall of the connecting column 5 , the first limiting piece 24 is connected to the rotating column 21 via a spring piece 25 , and a second limiting piece 26 is arranged on the outer wall of the rotating column 21 .

[0058] In detail, the spring piece 25 can provide an elastic thrust to the rotating column 21, so that the hand lever 23 fits against the back of the square screen 2. When the round screen 3 moves, due to the action of the spring piece 25, the hand lever 23 moves down to between the square screen 2 and the round screen 3, thereby automatically revealing the hand lever 23. The rotation of the rotating column 21 will drive the second limiting piece 26 thereon to move synchronously. When the second limiting piece 26 contacts the first limiting piece 24, the rotating column 21 stops rotating, thereby having a limiting effect on the rotating column 21 and the hand lever 23.

[0059] Since the first limiting piece 24 is inclined, when the rotating column 21 and the hand lever 23 rotate, the hand lever 23 will pass through the axis of the connecting column 5 and continue to move, thereby utilizing the elastic force of the first spring 7 and the locking effect of the first limiting piece 24 on the hand lever 23 to achieve the locking work of the hand lever 23 position and prevent it from moving at will.

[0060] like Figure 7 As shown, a rubber wheel 27 is rotatably provided on each of the side panels 22 , the rubber wheel 27 is coaxial with the hand lever 23 , and the rubber wheel 27 contacts the back surface of the square screen 2 .

[0061] In detail, by providing the rubber wheel 27, the hand lever 23 can be kept separated from the square screen 2, that is, the rubber wheel 27 protects the square screen 2. When the rotating column 21 rotates, the rubber wheel 27 rolls on the back of the square screen 2, thereby reducing friction and avoiding damage to the square screen 2.

[0062] like Figures 4 to 5 As shown, each of the four corners of the back side of the square screen 2 is provided with plug posts 28;

[0063] A sleeve 29 is rolled on the back plate 4, a movable rod 30 is slidably inserted in the sleeve 29, a second spring 31 is arranged between the sleeve 29 and the movable rod 30, a top pressure plate 32 is arranged at the end of the movable rod 30, and four insertion holes 33 are opened on the top pressure plate 32;

[0064] The top pressure plate 32 is aligned with the contact points of four adjacent square screens 2 , and the four insertion holes 33 on the top pressure plate 32 are used in conjunction with the four insertion posts 28 at the contact points of the four adjacent square screens 2 .

[0065] In detail, the top pressure plate 32 on each group of panel structures 1 is located at a corner position thereof, and the top pressure plate 32 at this position can be used in conjunction with the four pins 28 on the four adjacent square screens 2, thereby utilizing the plane of the top pressure plate 32 to achieve the alignment and coplanarity processing of the four adjacent square screens 2, which facilitates making multiple groups of panel structures 1 coplanar, and the four insertion holes 33 on the top pressure plate 32 are used to provide insertion positions for the four pins 28 at the contact point positions, thereby utilizing the pins 28 to achieve the fastening connection of the four adjacent square screens 2 by the top pressure plate 32, and this connection method does not affect the translational movement of the square screen 2, but only hinders its vertical movement.

[0066] Since the distance between the square screen 2 and the round screen 3 and the back plate 4 is adjustable when they are fixed, it is necessary to utilize the retractability of the sleeve 29 and the movable rod 30 to provide support for the top pressure plate 32. The second spring 31 can provide elastic thrust for the top pressure plate 32, thereby providing auxiliary thrust for the contact point positions of the four adjacent square screens 2.

[0067] like Figure 5 As shown, a positioning plate 34 is slidably provided on the side wall of each guide rod 17 , and the positioning plate 34 is used to limit the position of the guide sleeve 16 on the guide rod 17 . The positioning plate 34 is fixed to the guide rod 17 by a locking bolt 35 .

[0068] In detail, by setting the positioning plate 34, the position of the guide sleeve 16 can be conveniently limited, thereby limiting the distance between the square screen 2 and the round screen 3 and the back plate 4 when fixed, making it convenient for the square screens 2 on multiple groups of panel structures 1 to be accurately coplanar, thereby improving the flatness of the combined screen, and by loosening the locking bolt 35, the position of the positioning plate 34 can be adjusted, thereby adjusting the positioning position of the guide sleeve 16.

[0069] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A teaching demonstration combined screen for students, characterized in that: The combined screen is composed of a plurality of coplanar panel structures; The panel structure includes a square screen, a round screen and a back plate. A round hole is provided in the middle of the square screen. The round screen is located in the round hole, and the square screen and the round screen are coplanar. The back plate and the square screen are distributed front to back, and the back plate is used to be fixed on the wall. The back plate supports the square screen. A connecting column, a first chuck, a first spring, a connecting cylinder, a second chuck, a threaded tube and a threaded rod are sequentially arranged between the round screen and the back plate. One end of the connecting column is fixed on the round screen. The first chuck and the second chuck are both located on the inner side of the connecting cylinder. A card groove and a protrusion that cooperate with each other are arranged on the end surface of the first chuck and the end surface of the second chuck. The first chuck is connected to the second chuck by a first spring. The other end of the connecting column is slidably inserted into the connecting cylinder and fixedly connected to the first chuck. One end of the threaded tube is slidably inserted into the connecting cylinder and connected to the second chuck. The threaded rod is screwed into the other end of the threaded tube, and the threaded rod is fixed to the back plate. Among them, a guide structure is arranged between the square screen and the back plate, and the guide structure is fixedly connected to the connecting tube. When the threaded tube is separated from the threaded rod, the guide structure is disassembled, and the square screen is separated from the back plate.

2. A teaching demonstration combined screen for students according to claim 1, characterized in that: A square block is fixed between the connecting column and the first chuck, and a square barrel is connected to the end of the connecting cylinder facing the round screen, and the square block is slidably located in the square barrel; A prism is arranged in the middle of the second chuck, the prism is located inside the first spring, and the end of the prism passes through the first chuck and the block and is slidably inserted into the connecting column.

3. A teaching demonstration combined screen for students according to claim 1, characterized in that: The guide structure includes two side rods fixed on the outer wall of the connecting tube, the two side rods are collinear and opposite in direction, a guide sleeve is fixed on each side rod, the length direction of the guide sleeve is along the vertical connection direction of the square screen and the back plate, one end of the guide sleeve is fixed on the square screen, and the other end of the guide sleeve is slidably inserted with a guide rod, and the guide rod is fixed on the back plate.

4. A teaching demonstration combined screen for students according to claim 2, characterized in that: The communicating position between the square barrel and the connecting tube is set as a conical surface.

5. A teaching demonstration combined screen for students according to claim 3, characterized in that: An electromagnetic propeller is rolled on the side rod, and a clamping plate is arranged at the output end of the electromagnetic propeller. The clamping plate passes through the connecting tube and slides into and is inserted between the first clamping plate and the second clamping plate.

6. A teaching demonstration combined screen for students according to claim 1, characterized in that: A rotating column is rotatably inserted on the connecting column, the axis of the rotating column is perpendicular to the axis of the connecting column, side plates are fixed at both ends of the rotating column, a hand rod is connected between the two side plates, and the hand rod is far away from the connecting column.

7. A teaching demonstration combined screen for students according to claim 6, characterized in that: A first limiting piece is obliquely fixed on the outer wall of the connecting column, the first limiting piece is connected to the rotating column via a spring sheet, and a second limiting piece is arranged on the outer wall of the rotating column.

8. A teaching demonstration combined screen for students according to claim 7, characterized in that: A rubber wheel is rotatably arranged on each of the side plates. The rubber wheel is coaxial with the hand lever and contacts the back of the square screen.

9. A teaching demonstration combined screen for students according to claim 1, characterized in that: Each of the four corners of the back of the square screen is provided with plug posts; A sleeve is rolled on the back plate, a movable rod is slidably inserted in the sleeve, a second spring is arranged between the sleeve and the movable rod, a top pressure plate is arranged at the end of the movable rod, and four insertion holes are opened on the top pressure plate; The top pressure plate is aligned with the contact points of four adjacent square screens, and the four insertion holes on the top pressure plate are used in conjunction with the four insertion columns at the contact points of the four adjacent square screens.

10. A teaching demonstration combined screen for students according to claim 3, characterized in that: A positioning plate is slidably arranged on the side wall of each guide rod. The positioning plate is used to limit the position of the guide sleeve on the guide rod. The positioning plate is fixed to the guide rod by a locking bolt.

Images