A demonstration device for explaining equation classification for teaching advanced mathematics calculus

Abstract

The present invention relates to the technical field of demonstration devices, specifically to a demonstration device for classifying and explaining equations for teaching advanced mathematics and calculus, comprising a fixed frame and a whiteboard body, wherein a push-pull mechanism is arranged inside the whiteboard body, wherein the push-pull mechanism comprises a push chamber, an observation port, a disassembly port, a first slide rail, a first slider, a first writing board, a second writing board, a buffer block, a rack plate and a transmission gear, wherein a push chamber is arranged inside the whiteboard body, and a reciprocating mechanism is arranged at the top of the transmission gear and the left side of the front end of the whiteboard body, and a third slider is slidably connected inside the third slide rail, and a cleaning block is glued to the back of the third slider. The present invention improves ease of use and practicality, and effectively prevents the problem that, under long-term use, due to the different heights of the teachers, a higher position may not be erased, and over time, a deeper pen mark will be left on the board surface.

Description

Technical Field

[0001] The invention relates to the technical field of demonstration devices, in particular to an equation classification explanation demonstration device for teaching advanced mathematics calculus. Background Art

[0002] Generally, when conducting mathematics teaching and demonstration, most of them need to use demonstration devices to assist in the explanation, and record the learning tasks and equations on the whiteboard, so that students can understand calculus more quickly, which increases the students' learning efficiency. The existing advanced mathematics calculus teaching equation classification explanation demonstration device has a variety of functions and realizes diversification. Therefore, it can be seen that the existing advanced mathematics calculus teaching equation classification explanation demonstration device has met people's use needs, but the following problems still exist.

[0003] The existing equation classification explanation demonstration device for teaching advanced mathematics calculus is generally designed as a fixed structure. When conducting teaching demonstrations, due to the limited display range of the board itself, the whiteboard needs to be erased when used for a long time. Traditionally, most of them use a blackboard eraser to erase the board, but due to the different heights of the teachers, it may be impossible to erase at a higher position. Over time, deep pen marks will be left on the board, reducing ease of use and practicality. Therefore, a new type of equation classification explanation demonstration device for teaching advanced mathematics calculus is urgently needed to solve the above problems. Summary of the invention

[0004] The purpose of the present invention is to provide an equation classification explanation and demonstration device for teaching advanced mathematics calculus, so as to solve the problem that the higher position cannot be erased as mentioned in the above background technology, and over time, deep marks will be left on the board surface.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: an equation classification explanation demonstration device for teaching advanced mathematics calculus, comprising a fixed frame and a whiteboard body, the whiteboard body is fixedly installed on the top of the fixed frame, a push-pull mechanism is arranged inside the whiteboard body, the push-pull mechanism comprises a push cavity, an observation port, a removal port, a first slide rail, a first slider, a first writing board, a second writing board, a buffer block, a rack plate and a transmission gear, a push cavity is opened inside the whiteboard body, the front and rear sides of the bottom of the push cavity are both provided with a first slide rail, and the first slide rail is slidably connected to the inside of the first slide rail, and the first writing board is fixedly installed on the top of the first slider at the front end,A second writing board is fixedly installed on the top of the first slider at the rear end, and rack plates are welded on the tops of the first writing board and the second writing board, and the rack plates are meshed with transmission gears near the inner side of the pushing cavity. A reciprocating mechanism is arranged on the top of the transmission gear and the left side of the front end of the whiteboard body. The reciprocating mechanism includes a baffle, a second slide rail, a second slider, a conveying cavity, a first shaft rod, a sleeve, a slide groove, a first bevel gear, a second bevel gear, a second shaft rod, a first wheel disc, a third shaft rod, a second wheel disc, a transmission belt, a slide rod and a fixed plate. A baffle is fixedly installed on the bottom end of the left side of the front side of the whiteboard body, and A second slide rail is provided at the top of the baffle, and a second slider is slidably connected inside the second slide rail. The top of the left side of the front face of the whiteboard body is fixedly installed with a conveying cavity. A first shaft rod is provided inside the conveying cavity, and the left and right sides of the first shaft rod are movably connected with the conveying cavity through bearings. A sleeve is sleeved on the outside of the first shaft rod, and a first bevel gear is sleeved on the right side of the outside of the first shaft rod. The inner walls of the sleeve and the first bevel gear are welded to the outer wall of the first shaft rod, and a second bevel gear is meshed at the top right side of the first bevel gear, and a second shaft rod is welded on the top of the second bevel gear. The top end of the second shaft rod passes through the conveying cavity and extends to the outer surface of the conveying cavity, and the second shaft rod is movably connected to the conveying cavity through a bearing, and the outer top end of the second shaft rod is sleeved with a first wheel disc, and the top end of the transmission gear is welded with a third shaft rod, and the top end of the third shaft rod passes through the whiteboard body and extends to the outer surface of the whiteboard body, and the third shaft rod is movably connected to the whiteboard body through a bearing, and the outer top end of the third shaft rod is sleeved with a second wheel disc, and the outsides of the first wheel disc and the second wheel disc are both sleeved inside the transmission belt, and a fixing plate is arranged on the left side of the front of the whiteboard body, and the bottom end of the fixing plate is welded to the second slider The top of the fixed plate is welded with a slide bar, and the slide bar is slidably connected to the inside of the slide slot. The front end of the push cavity, the left side of the back of the first writing board, and the back of the fixed plate are all provided with a cleaning mechanism. The cleaning mechanism includes a cleaning plate, a third slide rail, a third slider, a cleaning block, a limit cavity, a rotating rod, a torsion spring, and a card block. The front end of the push cavity, the left side of the back of the first writing board, and the back of the fixed plate are all fixedly installed with a cleaning plate, and the back of the cleaning plate is provided with a third slide rail. The third slider is slidably connected inside the third slide rail, and the back of the third slider is glued with a cleaning block. ,

[0006] Preferably, an observation port is opened on the right side of the front side of the whiteboard body, and the rear end of the observation port and the pushing cavity are interconnected. A removal port is opened in the middle position of the back side of the whiteboard body, and the removal port is located directly behind the connection between the first writing board and the second writing board.

[0007] Preferably, a groove is provided on the right side of the front of the first writing board and the second writing board, and a pull rod is provided inside the groove, the upper and lower ends of the pull rod are welded to the inner wall of the groove, and the outside of the pull rod is covered with a rubber pad.

[0008] Preferably, buffer blocks are embedded on both sides of the pushing cavity, and the buffer blocks are made of rubber material. The height of the buffer blocks is equal to the height of the first writing board and the second writing board.

[0009] Preferably, a groove cooperating with the slide rod is provided at the bottom end of the conveying cavity, and the slide groove is designed in a spiral shape.

[0010] Preferably, a limiting cavity is opened inside the cleaning plate, and a rotating rod is arranged inside the limiting cavity, the left side of the rotating rod is movably connected to the inner wall of the limiting cavity through a bearing, and the right side of the rotating rod passes through the limiting cavity and extends to the outer surface of the cleaning plate, a torsion spring is wound around the left side of the outside of the rotating rod, and the left side of the torsion spring is welded to the inner wall of the limiting cavity, and the right side of the torsion spring is welded to the outer wall of the rotating rod.

[0011] Preferably, blocks are fixedly installed on both left and right sides of the back of the rotating rod, and grooves cooperating with the blocks are opened on both sides of the front of the third sliding block, and the blocks and the grooves are engaged with each other, and the grooves are designed to be arc-shaped.

[0012] Preferably, the back surfaces of the three groups of cleaning blocks are respectively attached to the front surfaces of the whiteboard body, the first writing board and the second writing board, and the cleaning blocks are made of sponge.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] 1. The equation classification explanation demonstration device for teaching advanced mathematics calculus is provided with a first slide rail, a first slider, a first writing board, a second writing board, a buffer block, a rack plate, a transmission gear, a first bevel gear, a second bevel gear, a second shaft rod, a first wheel disc, a third shaft rod, a second wheel disc, a transmission belt, a slide rod, a fixed plate and a cleaning block. When the board surface needs to be erased after long-term use, the pull rod is first pushed to move the first writing board. While the first writing board moves, the rack plate moves at the same time. When the rack plate and the transmission gear are meshed with each other, the second writing board is driven to move under the action of the sliding connection between the first slide rail and the first slider. While the transmission gear rotates, the third shaft rod is synchronously rotated. The first gear and the second gear are engaged with each other, and the first gear rotates, causing the sleeve to drive the slide groove to rotate, and the slide bar drives the fixed plate to reciprocate left and right. When the first writing board, the second writing board and the fixed plate are moving, the cleaning block erases the surfaces of the whiteboard body, the first writing board and the second writing board to remove the marks, which is convenient for teachers to teach, improves ease of use and practicality, and effectively prevents the problem that the high position cannot be erased due to the different heights of the teachers during long-term use, and deep pen marks will be left on the board surface over time.

[0015] 2. The equation classification explanation demonstration device for teaching advanced mathematics calculus is provided with a third slide rail, a third slider, a cleaning block, a limit cavity, a rotating rod, a torsion spring and a clamping block. When the cleaning block needs to be cleaned or replaced, the rotating rod is first rotated to release the engagement between the clamping block and the third slider, and then the cleaning block is pulled. Under the action of the sliding connection between the third slide rail and the third slider, the cleaning block is taken out and cleaned, which improves ease of use and practicality, and effectively prevents the problem that the cleaning block is difficult to clean after long-term use, which effectively prevents the teacher from writing. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] 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 of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 It is a front cross-sectional structural schematic diagram of the present invention;

[0018] Figure 2 It is a schematic diagram of the front end cross-sectional structure of the present invention;

[0019] Figure 3 It is a schematic diagram of a top cross-sectional structure of the present invention;

[0020] Figure 4 It is a schematic diagram of the top view of the structure of the present invention;

[0021] Figure 5 For the present invention Figure 1 A schematic diagram of the structure enlargement in the middle;

[0022] Figure 6 For the present invention Figure 2 A magnified schematic diagram of the structure at B in the middle;

[0023] Figure 7 For the present invention Figure 2 A magnified schematic diagram of the structure at C in the middle;

[0024] Figure 8 For the present invention Figure 2 A magnified schematic diagram of the structure at D in the middle;

[0025] Fig. 9 For the present invention Figure 3 The enlarged schematic diagram of the structure at E in the middle;

[0026] Fig.10 For the present invention Fig. 9 The enlarged schematic diagram of the structure at F in the middle;

[0027] Fig.11 It is a schematic diagram of the top view of the rack plate and gear of the present invention.

[0028] In the figure: 1, fixed frame; 2, whiteboard body; 311, push cavity; 312, observation port; 313, removal port; 314, first slide rail; 315, first slider; 316, first writing board; 317, second writing board; 318, buffer block; 319, rack plate; 320, transmission gear; 411, baffle; 412, second slide rail; 413, second slider; 414, conveying cavity; 415, first shaft rod; 416, sleeve; 4 17. Slide groove; 418. First bevel gear; 419. Second bevel gear; 420. Second shaft rod; 421. First wheel disc; 422. Third shaft rod; 423. Second wheel disc; 424. Transmission belt; 425. Slide rod; 426. Fixed plate; 511. Cleaning plate; 512. Third slide rail; 513. Third slider; 514. Cleaning block; 515. Limiting cavity; 516. Rotating rod; 517. Torsion spring; 518. Block. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] See also Figure 1-11An embodiment of the present invention is a device for explaining and demonstrating equations for teaching advanced mathematics and calculus, comprising a fixed frame 1 and a whiteboard body 2, wherein the whiteboard body 2 is fixedly mounted on the top of the fixed frame 1, and a push-pull mechanism is arranged inside the whiteboard body 2, wherein the push-pull mechanism comprises a push cavity 311, an observation port 312, a removal port 313, a first slide rail 314, a first slider 315, a first writing board 316, a second writing board 317, a buffer block 318, a rack plate 319 and a transmission gear 320, wherein a push cavity 311 is arranged inside the whiteboard body 2, and first slide rails 314 are arranged on both the front and rear sides of the bottom of the push cavity 311, and first sliders 315 are slidably connected inside the first slide rails 314, and the front end of the first slider 315 is arranged on the front end of the first slider 315. A first writing board 316 is fixedly installed on the top, and a second writing board 317 is fixedly installed on the top of the first slider 315 at the rear end. A rack plate 319 is welded to the top of the first writing board 316 and the second writing board 317, and the rack plate 319 is meshed with a transmission gear 320 near the inner side of the pushing cavity 311. A reciprocating mechanism is arranged at the top of the transmission gear 320 and the left side of the front end of the whiteboard body 2. The reciprocating mechanism includes a baffle 411, a second slide rail 412, a second slider 413, a conveying cavity 414, a first shaft rod 415, a sleeve 416, a slide groove 417, a first bevel gear 418, a second bevel gear 419, a second shaft rod 420, a first wheel disc 421, a third shaft rod 422, a second wheel disc 423, a transmission belt 424, Slide rod 425 and fixed plate 426, a baffle 411 is fixedly installed at the bottom end of the left side of the front face of the whiteboard body 2, and a second slide rail 412 is opened at the top of the baffle 411, and a second slider 413 is slidably connected inside the second slide rail 412, and the top of the left side of the front face of the whiteboard body 2 is fixedly installed with a conveying chamber 414, a first shaft rod 415 is arranged inside the conveying chamber 414, and the left and right sides of the first shaft rod 415 are movably connected to the conveying chamber 414 through bearings, a sleeve 416 is sleeved on the outside of the first shaft rod 415, and a first bevel gear 418 is sleeved on the right side of the outside of the first shaft rod 415, the inner walls of the sleeve 416 and the first bevel gear 418 are welded to the outer wall of the first shaft rod 415, and the top right side of the first bevel gear 418 A second bevel gear 419 is meshed, and a second shaft rod 420 is welded to the top of the second bevel gear 419, the top of the second shaft rod 420 penetrates the conveying cavity 414 and extends to the outer surface of the conveying cavity 414, and the second shaft rod 420 is movably connected to the conveying cavity 414 through a bearing, and the outer top of the second shaft rod 420 is sleeved with a first wheel disc 421, and the top of the transmission gear 320 is welded with a third shaft rod 422, and the top of the third shaft rod 422 penetrates the whiteboard body 2 and extends to the outer surface of the whiteboard body 2, and the third shaft rod 422 is movably connected to the whiteboard body 2 through a bearing, and the outer top of the third shaft rod 422 is sleeved with a second wheel disc 423, and the outsides of the first wheel disc 421 and the second wheel disc 423 are both sleeved inside the transmission belt 424,A fixing plate 426 is provided on the left side of the front of the whiteboard body 2, and the bottom end of the fixing plate 426 is welded to the top of the second slider 413, a sliding rod 425 is welded to the top of the fixing plate 426, and the sliding rod 425 is slidably connected to the inside of the slide groove 417, and a cleaning mechanism is provided at the front end of the pushing cavity 311, the left side of the back of the first writing board 316, and the back of the fixing plate 426. The cleaning mechanism includes a cleaning plate 511, a third slide rail 512, a third slider 513, a cleaning block 514, a limiting cavity 515, a rotating rod 516, a torsion spring 517, and a clamping block 518. The front end of the pushing cavity 311, the left side of the back of the first writing board 316, and the back of the fixing plate 426 are all fixedly installed with a cleaning plate 511, and a third slide rail 512 is provided on the back of the cleaning plate 511, and a third slider 513 is slidably connected inside the third slide rail 512, and a cleaning block 514 is glued to the back of the third slider 513.

[0031] An observation port 312 is provided on the right side of the front side of the whiteboard body 2, and the rear end of the observation port 312 and the pushing cavity 311 are interconnected. A removal port 313 is provided at the middle position of the back side of the whiteboard body 2, and the removal port 313 is located directly behind the connection between the first writing board 316 and the second writing board 317. With the help of the observation port 312, it is convenient to watch the first writing board 316 and the second writing board 317, which is convenient for students to study and memorize, and improves the usability. With the help of the removal port 313, it is convenient to disassemble and replace the cleaning block 514 on the back side of the first writing board 316, which improves the practicality.

[0032] A pull groove is provided on the right side of the front of the first writing board 316 and the second writing board 317, and a pull rod is provided inside the pull groove. The upper and lower ends of the pull rod are welded to the inner wall of the pull groove, and the outside of the pull rod is wrapped with a rubber pad. Under the action of the pull rod, the first writing board 316 and the second writing board 317 can be pulled conveniently, so as to facilitate the switching of the board surfaces.

[0033] Buffer blocks 318 are embedded on both sides of the pushing cavity 311, and the buffer blocks 318 are made of rubber. The height of the buffer blocks 318 is equal to the height of the first writing board 316 and the second writing board 317. Under the action of the buffer blocks 318, it is convenient to buffer and reduce shock on the frames of the second writing board 317 and the first writing board 316, thereby improving stability.

[0034] The bottom end of the conveying cavity 414 is provided with a groove that cooperates with the slide rod 425. The slide groove 417 is designed in a spiral shape. Under the action of the slide groove 417 and the slide rod 425, when the sleeve 416 rotates, the slide rod 425 reciprocates left and right to erase the front side of the whiteboard body 2, thereby improving ease of use.

[0035] A limiting cavity 515 is provided inside the cleaning plate 511, and a rotating rod 516 is arranged inside the limiting cavity 515. The left side of the rotating rod 516 is movably connected to the inner wall of the limiting cavity 515 through a bearing, and the right side of the rotating rod 516 passes through the limiting cavity 515 and extends to the outer surface of the cleaning plate 511. A torsion spring 517 is wound around the left side of the outside of the rotating rod 516, and the left side of the torsion spring 517 is welded to the inner wall of the limiting cavity 515, and the right side of the torsion spring 517 is welded to the outer wall of the rotating rod 516. Under the action of this mechanism, the cleaning block 514 is convenient to fix and replace, thereby improving ease of use.

[0036] Blocks 518 are fixedly installed on the left and right sides of the back of the rotating rod 516, and grooves that cooperate with the block 518 are opened on both sides of the front of the third sliding block 513, and the block 518 and the groove are engaged with each other. The groove is designed to be arc-shaped. With the action of the groove, it is convenient to fix the third sliding block 513 and limit the cleaning block 514, thereby improving ease of use.

[0037] The backs of the three groups of cleaning blocks 514 are respectively adhered to the fronts of the whiteboard body 2, the first writing board 316 and the second writing board 317, and the cleaning blocks 514 are made of sponge. Under the effect of mutual adhesion, it is easier to clean the surface, thereby improving ease of use.

[0038] Working principle: When the board needs to be erased after long-term use, first push the pull rod, and the first writing board 316 moves under the action of the sliding connection between the first slide rail 314 and the first slider 315. When the first writing board 316 moves, the rack plate 319 moves at the same time. When the rack plate 319 and the transmission gear 320 are meshed with each other, the second writing board 317 is driven to move under the action of the sliding connection between the first slide rail 314 and the first slider 315. When the transmission gear 320 rotates, the third shaft rod 422 rotates synchronously, driving the second shaft rod 422 to move. 420 rotates, and under the action of the transmission belt 424, the first wheel plate 421 is driven to rotate. Under the mutual meshing action of the first bevel gear 418 and the second bevel gear 419, the first shaft rod 415 rotates, so that the sleeve 416 drives the slide groove 417 to rotate, and under the action of the slide rod 425, the fixed plate 426 is driven to reciprocate left and right. When the first writing board 316, the second writing board 317 and the fixed plate 426 move, the cleaning block 514 erases the surface of the whiteboard body 2, the first writing board 316 and the second writing board 317 to remove the traces;

[0039] When the cleaning block 514 needs to be cleaned or replaced, first rotate the rotating rod 516 to make the torsion spring 517 elastically deform, thereby releasing the engagement between the blocking block 518 and the third slider 513, and then pull the cleaning block 514. With the sliding connection between the third slide rail 512 and the third slider 513, the cleaning block 514 is taken out and cleaned. With the action of the disassembly port 313, the first slide rail 314 on the back of the first writing board 316 is conveniently taken out and cleaned, and the operation is now completed.

[0040] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

Claims

1. A device for explaining and demonstrating equation classification for teaching advanced mathematics and calculus, comprising a fixing frame (1) and a whiteboard body (2), wherein the whiteboard body (2) is fixedly mounted on the top of the fixing frame (1), and characterized in that: A push-pull mechanism is arranged inside the whiteboard body (2), and the push-pull mechanism comprises a push cavity (311), an observation port (312), a removal port (313), a first slide rail (314), a first slider (315), a first writing board (316), a second writing board (317), a buffer block (318), a rack plate (319) and a transmission gear (320). The push cavity (311) is arranged inside the whiteboard body (2), and the first slide rail (314) is arranged at both the front and rear sides of the bottom of the push cavity (311), and the first slider (315) is slidably connected inside the first slide rail (314), and the first writing board (316) is fixedly installed on the top of the first slider (315) at the front end, and the first slider (315) is arranged at the rear end. A second writing board (317) is fixedly installed at the top of (315), a rack plate (319) is welded to the top of the first writing board (316) and the second writing board (317), and a transmission gear (320) is meshed on the inner side of the rack plate (319) near the pushing chamber (311), and a reciprocating mechanism is arranged at the top of the transmission gear (320) and the left side of the front end of the whiteboard body (2), and the reciprocating mechanism includes a baffle (411), a second slide rail (412), a second slider (413), a conveying chamber (414), a first shaft (415), a sleeve (416), a slide groove (417), a first bevel gear (418), a second bevel gear (419), a second shaft (420), a first wheel (421), A third shaft (422), a second wheel (423), a transmission belt (424), a slide bar (425) and a fixed plate (426); a baffle (411) is fixedly installed at the bottom end of the left side of the front face of the whiteboard body (2); a second slide rail (412) is provided at the top end of the baffle (411); a second slide block (413) is slidably connected inside the second slide rail (412); a top end of the left side of the front face of the whiteboard body (2) is fixedly installed with a conveying cavity (414); a first shaft (415) is provided inside the conveying cavity (414); and the left and right sides of the first shaft (415) are movably connected to the conveying cavity (414) through bearings; a sleeve (416) is sleeved outside the first shaft (415); and the first shaft (4 15), a first bevel gear (418) is sleeved on the right side of the outside of the sleeve (416), the inner walls of the sleeve (416) and the first bevel gear (418) are welded to the outer wall of the first shaft (415), a second bevel gear (419) is meshed at the top right side of the first bevel gear (418), and a second shaft (420) is welded to the top of the second bevel gear (419), the top of the second shaft (420) passes through the conveying cavity (414) and extends to the outer surface of the conveying cavity (414), and the second shaft (420) is movably connected to the conveying cavity (414) via a bearing, a first wheel disc (421) is sleeved on the top outside of the second shaft (420), and a third shaft (422) is welded to the top of the transmission gear (320),The top end of the third shaft rod (422) passes through the whiteboard body (2) and extends to the outer surface of the whiteboard body (2), and the third shaft rod (422) is movably connected to the whiteboard body (2) through a bearing, the outer top end of the third shaft rod (422) is sleeved with a second wheel disc (423), and the outer parts of the first wheel disc (421) and the second wheel disc (423) are sleeved inside the transmission belt (424), a fixing plate (426) is provided on the left side of the front face of the whiteboard body (2), and the bottom end of the fixing plate (426) is welded to the top end of the second sliding block (413), a sliding rod (425) is welded to the top end of the fixing plate (426), and the sliding rod (425) is slidably connected to the inside of the sliding groove (417), and the inner front end of the pushing cavity (311) and the first bookcase (417) are connected. A cleaning mechanism is provided on the left side of the back of the writing board (316) and the back of the fixed plate (426), and the cleaning mechanism comprises a cleaning plate (511), a third slide rail (512), a third slider (513), a cleaning block (514), a limiting cavity (515), a rotating rod (516), a torsion spring (517) and a clamping block (518). The cleaning plate (511) is fixedly installed on the front end of the pushing cavity (311), the left side of the back of the first writing board (316) and the back of the fixed plate (426), and the back of the cleaning plate (511) is provided with a third slide rail (512), the third slider (513) is slidably connected inside the third slide rail (512), and the back of the third slider (513) is glued with a cleaning block (514).

2. The device for classifying and explaining equations for teaching advanced mathematics and calculus according to claim 1, characterized in that: An observation port (312) is provided on the right side of the front face of the whiteboard body (2), and the rear end of the observation port (312) and the pushing cavity (311) are mutually connected. A removal port (313) is provided at the middle position of the back face of the whiteboard body (2), and the removal port (313) is located directly behind the connection between the first writing board (316) and the second writing board (317).

3. The device for classifying, explaining and demonstrating equations for teaching advanced mathematics and calculus according to claim 1, characterized in that: The first writing board (316) and the second writing board (317) are both provided with a groove on the right side of the front side, and a pull rod is provided inside the groove. The upper and lower ends of the pull rod are welded to the inner wall of the groove, and the outside of the pull rod is covered with a rubber pad.

4. The device for classifying and explaining equations for teaching advanced mathematics and calculus according to claim 1, characterized in that: Buffer blocks (318) are embedded on both sides of the pushing cavity (311), and the buffer blocks (318) are made of rubber material. The height of the buffer blocks (318) is equal to the height of the first writing board (316) and the second writing board (317).

5. The device for classifying, explaining and demonstrating equations for teaching advanced mathematics and calculus according to claim 1, characterized in that: The bottom end of the conveying cavity (414) is provided with a notch that cooperates with the slide rod (425), and the slide groove (417) is designed in a spiral shape.

6. The device for classifying, explaining and demonstrating equations for teaching advanced mathematics and calculus according to claim 1, characterized in that: A limiting cavity (515) is provided inside the cleaning plate (511), and a rotating rod (516) is arranged inside the limiting cavity (515); the left side of the rotating rod (516) is movably connected to the inner wall of the limiting cavity (515) via a bearing, and the right side of the rotating rod (516) passes through the limiting cavity (515) and extends to the outer surface of the cleaning plate (511); a torsion spring (517) is wound around the left side of the outside of the rotating rod (516), and the left side of the torsion spring (517) is welded to the inner wall of the limiting cavity (515), and the right side of the torsion spring (517) is welded to the outer wall of the rotating rod (516).

7. The device for classifying, explaining and demonstrating equations for teaching advanced mathematics and calculus according to claim 1, characterized in that: Blocks (518) are fixedly mounted on both left and right sides of the back of the rotating rod (516), and grooves cooperating with the block (518) are provided on both sides of the front of the third sliding block (513), and the block (518) and the groove are engaged with each other, and the groove is designed to be arc-shaped.

8. The device for classifying, explaining and demonstrating equations for teaching advanced mathematics and calculus according to claim 1, characterized in that: The back surfaces of the three groups of cleaning blocks (514) are respectively attached to the front surfaces of the whiteboard body (2), the first writing board (316) and the second writing board (317), and the cleaning blocks (514) are made of sponge.

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