A drawing device for higher vocational mathematics education

Abstract

The present invention discloses a drawing device for higher vocational mathematics education, which relates to the technical field of mathematics drawing, including a support device, wherein a limiting device is arranged at the left end inside the support device, and the limiting device is fixedly connected with a folding device. The present invention drives the following plate to move by setting a rotating track column, and when the following plate moves, it will also move in the sliding groove through a sliding block in coordination with a matching hole for auxiliary limiting, and when the annular disk moves, it will drive the chalk or marker to follow the function track to draw the required function image on the blackboard or whiteboard, thereby solving the problem that most of the drawing devices for higher mathematics teaching and education today cannot assist teachers to draw function images quickly and roughly, and then teachers need to find points to draw function images based on their own teaching experience, thereby reducing the teaching efficiency of teachers drawing to a certain extent.

Description

Technical Field

[0001] The invention relates to an auxiliary device for higher vocational teaching and education, in particular to a drawing device used for higher vocational mathematics education. Background Art

[0002] Mathematics is a discipline that studies concepts such as quantity, structure, change, space and information. Mathematics is a universal means for humans to strictly describe the abstract structure and patterns of things. It can be applied to any problem in the real world. All mathematical objects are essentially artificially defined.

[0003] Higher vocational education is the abbreviation of higher vocational education, and higher vocational education is clearly defined as an important part of higher education. In some professions, it is inevitable to use mathematical knowledge to work, so it is also inevitable to teach mathematical knowledge in higher vocational education. The teaching of mathematical knowledge requires drawing operations to assist the teaching of mathematical knowledge. Therefore, drawing devices used in the process of higher vocational mathematics teaching and education have emerged, that is, drawing devices used in higher vocational mathematics teaching and education.

[0004] At present, there are still some defects and deficiencies in the use of drawing devices for higher mathematics teaching and education. The specific areas that need to be improved are as follows:

[0005] 1. Most of the current drawing devices for higher mathematics teaching cannot assist teachers in drawing function graphs quickly and roughly, and teachers are required to find points to draw function graphs based on their own teaching experience, which reduces the efficiency of drawing teaching by teachers to a certain extent;

[0006] 2. Most of the current drawing devices for advanced mathematics teaching and education cannot be conveniently folded and carried, which, to a certain extent, reduces the convenience of teachers' later carrying and moving, thus bringing certain inconvenience to teachers' use during class changes;

[0007] 3. Most of the drawing devices used in advanced mathematics education today cannot be conveniently positioned for auxiliary drawing, and teachers are required to press for auxiliary positioning, so that teachers can only draw with one hand, which reduces the drawing speed of teachers;

[0008] 4. Most of the current drawing devices for advanced mathematics education cannot be easily connected to chalk or markers, and teachers need to make multiple adjustments to assemble and connect them, which reduces the convenience of use for teachers to a certain extent;

[0009] 5. Most of the drawing devices used in higher mathematics education today cannot assist in cleaning to a certain extent, and teachers are required to move the drawing devices several times to erase the images, which increases the workload of teachers to a certain extent. Summary of the invention

[0010] The purpose of the present invention is to provide a drawing device for higher vocational mathematics education to solve the problem raised in the above background technology that most of the current drawing devices for higher mathematics teaching and education cannot assist teachers in quickly drawing function graphs, and teachers are required to roughly find points to draw function graphs based on their own teaching experience, thus reducing the efficiency of teaching by teachers drawing to a certain extent.

[0011] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a drawing device for higher vocational mathematics education, comprising a supporting device, a limiting device is arranged at the left end inside the supporting device, the limiting device is fixedly connected to a folding device, the right end of the folding device is fixedly connected to a connecting device, a positioning device is arranged at the center of the supporting device, an auxiliary device is arranged at the right end inside the supporting device, a guiding device is arranged at the lower end inside the supporting device, and the guiding device is movably connected to the auxiliary device and the limiting device.

[0012] As a preferred technical solution of the present invention, the supporting device includes a supporting box, a transparent window is provided on the left end of the upper side surface of the supporting box, an inspection cover is movably connected to the left end of the supporting box, a sliding groove is provided on the upper side of the right end wall of the supporting device, and a folding device is movably connected in the sliding groove.

[0013] As a preferred technical solution of the present invention, the folding device includes a follower plate, a receiving groove is provided inside the follower plate, a plurality of snap-in grooves are evenly provided on the inner wall at the lower end of the receiving groove, one of the plurality of snap-in grooves is movably connected with a snap-in block, a limiting plate is fixedly connected to the upper end of the snap-in block, the limiting plate is movably connected in the limiting groove, the limiting groove is provided at the left end of the folding plate, two ends of a push spring are fixedly connected to the opposite surfaces of the limiting groove and the limiting plate, a pulling block is fixedly connected to the front and rear sides of the right end of the folding plate, and the folding plate The front and rear ends of the right side surface are fixedly connected to hinge seats, and adjustable hinge grooves are provided on the two hinge seats. Hinge columns are movably connected in the two adjustable hinge grooves, and the opposite surfaces of the two hinge columns are fixedly connected to the fixed plate. The left end of the fixed plate is fixedly connected to a connecting block, and the connecting block is movably connected in the connecting groove. The connecting groove is provided at the right end of the folding plate, and the fixed plate is fixedly connected with a connecting device. The right end of the follower plate is arranged at the right end of the support box through a matching hole, and the matching hole is provided in the sliding block, and the sliding block is movably connected in the sliding groove.

[0014] As a preferred technical solution of the present invention, the guiding device includes a rotating belt, the left and right ends of the rotating belt are movably connected with a transmission shaft, the front and rear ends of the two transmission shafts are movably connected to the support box, the front and rear ends of the left end transmission shaft are fixedly connected with a rotating disk, and the back surfaces of the two rotating disks are fixedly connected with a plurality of anti-sliding blocks, and a plurality of function tracks are evenly opened on the outer side surface of the rotating belt, and the rear ends of the plurality of function tracks are connected to a guide track, and the guide track is opened on the outer side surface of the rear end of the rotating belt.

[0015] As a preferred technical solution of the present invention, the auxiliary device includes a reinforcement plate, which is fixedly connected to the inner wall of the right end of the support box, and telescopic rods are fixedly connected to the lower side surfaces of the front and rear ends of the reinforcement plate, and the lower ends of the two telescopic rods are fixedly connected to tensioning blocks, and the two tensioning blocks are movably connected to the optical axes at the front and rear ends of the tensioning shaft, respectively, and the upper end of the tensioning shaft is movably connected to the lower end of the rotating belt, and the two telescopic rods are sleeved with tensioning springs, and the two ends of the two tensioning springs are respectively fixedly connected to the opposite surfaces of the two tensioning blocks and the reinforcement plate, and a cleaning brush is fixedly connected to the lower side surface of the reinforcement plate, and the cleaning brush is movably connected to the upper outer side surface of the rotating belt.

[0016] As a preferred technical solution of the present invention, the limiting device includes a track column, the upper end of the track column is fixedly connected to a follower plate, the lower end of the track column is movably connected to a limited slot one and a limited slot two, the limited slot one is arranged on the horizontal plate, the front and rear ends of the horizontal plate are fixedly connected to positioning blocks, the two positioning blocks are respectively movably connected in the two positioning slots, the two positioning slots are respectively arranged in the two fixed blocks, the two fixed blocks are respectively fixedly connected to the front and rear inner walls of the support box, the limited slot two is arranged on the vertical plate, the left and right ends of the vertical plate are movably connected with positioning rods, the front and rear ends of the two positioning rods are respectively fixedly connected to the front and rear inner walls of the support box, one end of a power rod is fixedly connected to the front side wall of the vertical plate, and the other end of the power rod passes through the front side wall of the support box and is fixedly connected to a power handle.

[0017] As a preferred technical solution of the present invention, the positioning device includes a handle, which is fixedly connected to the center of the upper side surface of the support box, and limit rails are arranged on the front and rear ends of the handle, and the two limit rails are fixedly connected to the upper side surface of the support box, and the inner walls of the opposite surfaces of the two limit rails are fixedly connected to limit rods, and the two limit rods are respectively movably connected to two limit blocks, and the two limit blocks are respectively movably connected in the two limit rails, and the two limit rods are respectively sleeved with return springs, and the two ends of the two return springs are respectively fixedly connected to the opposite surfaces of the two limit blocks and the two limit rods on the back sides, the upper ends of the two limit blocks are movably connected to one end of the connecting plate through a hinge seat, and the other ends of the two connecting plates are movably connected to the lower end of the pressure plate through other two hinge seats, and the front and rear ends of the pressure plate are fixedly connected to the suction rod.

[0018] As a preferred technical solution of the present invention, the lower ends of the two suction rods are provided with movable plugs movably connected in the two suction cylinders, the two suction cylinders are respectively fixedly connected to the front and rear sides of the support box, the lower ends of the two suction cylinders are respectively fixedly connected to two air connecting blocks, the two air connecting blocks are respectively fixedly connected to the front and rear inner walls of the auxiliary frame, the two air connecting blocks are connected to a ventilation shell through the auxiliary frame, the lower end of the ventilation shell is fixedly connected to two negative pressure suction nozzles, and square hole one and square hole two are respectively opened on the left and right side walls at the center of the auxiliary frame.

[0019] As a preferred technical solution of the present invention, the cleaning device includes a positioning seat, the positioning seat corresponding to the second square hole is fixedly connected to the right side surface of the auxiliary frame, the positioning seat is movably connected to the lower end of the positioning shaft, and the outer side surface of the upper end of the positioning shaft is fixedly connected to a gear plate and a rotating plate, a movable groove is opened in the rotating plate, and a movable plate is movably connected in the movable groove, and a friction pad is movably connected to the side surface of the movable plate, and the friction pad is fixedly connected to the inner wall of the upper end of the movable groove, the lower end of the movable plate is fixedly connected to two cleaning brushes, and the left and right ends of the lower side surface of the rotating plate are fixedly connected to one cleaning brush, and the rear side surface of the movable plate is fixedly connected to a pulling plate, and the gear plate A power tooth plate is transmission-connected through square hole two, and the power tooth plate is movably connected with an auxiliary rod, and the front and rear ends of the auxiliary rod are respectively fixedly connected to the front and rear inner walls of the auxiliary frame, and the left end of the power tooth plate is fixedly connected with a hinge plate, and the hinge plate is hinged with a matching hinge groove, and the matching hinge groove is opened at the right end of the power plate, and a groove is opened at the center of the power plate, and an auxiliary shaft is movably connected in the groove, and the auxiliary shaft is fixedly connected to the lower side surface of the ventilation shell, and one end of the torsion spring is fixedly connected to the inner wall of the lower end of the groove, and the other end of the torsion spring is fixedly connected to the upper side surface of the ventilation shell, and the torsion spring is sleeved on the auxiliary shaft, and the left end of the power plate passes through square hole one and is arranged at the left end of the auxiliary frame.

[0020] As a preferred technical solution of the present invention, the connecting device includes two annular disks, a fixed plate is fixedly connected to the left side surface of the upper annular disk, and the lower side surface of the upper annular disk is connected to the lower annular disk through three fixed columns, the three fixed columns are movably connected in three arc grooves, the three arc grooves are opened on three clamping plates, and the outer sides of the three clamping plates are fixedly connected to the toggle plates, the three clamping plates are fan-shaped, and the inner walls at the centers of the three clamping plates are fixedly connected to the elastic layers, and the inner walls of the three arc grooves are opened Guide grooves, three groups of two-two guide grooves are all movably connected with guide blocks, three groups of two-two guide blocks are respectively fixedly connected to the outer sides of three fixed columns, three groups of two-two guide blocks are all movably connected with arc columns, two ends of the arc columns are respectively fixedly connected to the inner walls of the three groups of two-two guide grooves, three groups of two-two arc columns are all sleeved with return springs, and two ends of the return springs are respectively fixedly connected to the three groups of two-two guide blocks and the opposite surface of the three groups of two-two guide grooves close to the center.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] 1. The present invention drives the rotating shaft at the left end to rotate by setting a rotating disk and a plurality of two groups of anti-sliding blocks. The rotation of the rotating shaft at the left end will cooperate with the rotating shaft at the right end to drive the rotating belt to rotate. During the rotation of the rotating belt, the function track set on the outer surface of the rotating belt will rotate. When rotating to select a suitable function track, it will be stably moved through the guide track and the track column. During the rotation of the function track, the high-level mathematics teacher can observe through the transparent window. When it rotates to the function image to be drawn, the rotation can be stopped. Next, the power rod can be driven to move. During the movement of the power rod, the vertical plate will be driven to move. The movement of the vertical plate will drive the second limit slot to move. Then, the track column can be moved to the front side. When the track column moves to the front side, it will move with the corresponding function track. In this process, it will also be moved through the guide track. The over-limit groove cooperates with the transverse plate to move laterally. During the movement of the transverse plate, the positioning grooves opened in the two fixed blocks will cooperate with the two positioning blocks for auxiliary limiting, and then the following plate will be driven to move through the track column. When the following plate moves, the sliding block will cooperate with the matching hole to move in the sliding groove for auxiliary limiting. During the movement of the following plate, the folding plate and the two annular disks will be driven to move. When the annular disk moves, the chalk or marker will follow the function track to draw the required function image on the blackboard or whiteboard, thereby solving the problem that most of the drawing devices in higher mathematics teaching and education today cannot assist teachers in quickly and roughly drawing function images, and teachers need to find points to draw function images based on their own teaching experience, thereby reducing the efficiency of teaching using teachers' drawings to a certain extent.

[0023] The folding plate can be moved to the right side by the two pulling blocks, and the limiting groove can be used to make the limiting plate move downward through the pushing spring and the limiting groove, so that the clamping block can be used to position the folding plate in the storage groove. At the same time, the clamping block can be used to position the folding plate in the storage groove. At the same time, it can be convenient for high-level mathematics teachers to pull the folding plate out of the storage groove for different amounts according to needs, and the above operation can be repeated to position the adjusted position. After use, the above operation can be reversed to fold the folding plate for easy carrying, thereby solving the problem that most of the drawing devices for high-level mathematics teaching and education cannot be conveniently folded and carried, and thus reduces the convenience of carrying and moving for teachers in the later stage to a certain extent, thus bringing certain inconvenience to the teachers when changing classes.

[0024] 3. The present invention sets a handle to press the pressing plate to move downward. During the downward movement of the pressing plate, the two connecting plates will cooperate with the four corresponding hinge seats to make the lower ends of the two connecting plates close to each other. During the process of the lower ends of the two connecting plates approaching each other, the two limit blocks will be driven to ensure the stability of movement under the two limit rods and the two limit rails. At the same time, the pulling force of the two suction springs will be overcome, and then the two suction rods will be driven to move downward. The two suction rods move downward and cooperate with the two connecting blocks, the ventilation shell and the two negative pressure nozzles to empty the air of the two suction cylinders. Then the auxiliary frame can be placed at a suitable position of the blackboard or whiteboard, and then the pressing plate can be released to make the two A suction spring drives the two limit blocks to move away from each other. When the two limit blocks move away from each other, they can cooperate with the two connecting plates to make the pressure plate move upward and reset. In this process, the two suction rods can be driven to move upward in the two suction cylinders, and then the two connecting block ventilation shells and two negative pressure suction nozzles can be used to suck air. Subsequently, the positions of the auxiliary frame and the support box can be relatively positioned through the two negative pressure suction nozzles, thereby solving the problem that most of the drawing devices for higher mathematics teaching and education today cannot be conveniently positioned for auxiliary drawing, and teachers need to press for auxiliary positioning, so teachers can only draw with one hand, which reduces the drawing speed of teachers.

[0025] 4. The present invention sets a handle to press the pressing plate to move downward. During the downward movement of the pressing plate, the two connecting plates will cooperate with the four corresponding hinge seats to make the lower ends of the two connecting plates approach each other. During the process of the lower ends of the two connecting plates approaching each other, the two limit blocks will be driven to ensure the stability of movement under the two limit rods and the two limit rails. At the same time, the pulling force of the two suction springs will be overcome, and then the two suction rods will be driven to move downward. The two suction rods move downward to cooperate with the two connecting blocks, the ventilation shell and the two negative pressure nozzles to empty the air of the two suction cylinders. Then the auxiliary frame can be placed at a suitable position on the blackboard or whiteboard, and then the pressing plate can be released. The two suction springs drive the two limit blocks to move away from each other. When the two limit blocks move away from each other, they can cooperate with the two connecting plates to move the pressure plate upward and reset. In this process, the two suction rods can be driven to move upward in the two suction cylinders, and then the two connecting block ventilation shells and the two negative pressure suction nozzles can be used to suck air. Subsequently, the positions of the auxiliary frame and the support box can be relatively positioned through the two negative pressure suction nozzles, thereby solving the problem that most of the drawing devices for higher mathematics teaching and education today cannot be conveniently connected to chalk or markers, and teachers need to make multiple adjustments to assemble and connect them, thereby reducing the problem of ease of use for teachers to a certain extent.

[0026] 5. The present invention drives the movable plate to move in the movable groove by setting a pulling plate. When the movable plate moves in the movable groove, the adjusted position of the movable plate is positioned by the friction pad. Then the left end of the power plate can be toggled, and then it can be stably rotated under the support of the auxiliary shaft. When the power plate rotates, the torsion force generated by the torsion spring matching groove can be overcome. When the power plate rotates, the power tooth plate can be driven to move left and right through the matching hinge groove and the hinge plate. When the power tooth plate moves left and right, the auxiliary rod is used to limit the position to ensure the stability of the movement. When the power tooth plate moves left and right, the gear plate can be driven to rotate. The rotation of the gear disk will drive the rotation of the positioning shaft, and the rotation of the positioning shaft will ensure the relative position with the assistance of the positioning seat. During the rotation of the positioning shaft, the rotating plate will be driven to rotate in a fan-shaped cycle, and then the chalk or marker notes will be cleaned through two cleaning brushes one and two cleaning brushes two, thereby reducing the inconvenience of high-level mathematics teachers drawing graphs of different functions to a certain extent, thereby solving the problem that most of the drawing devices in today's high-level mathematics teaching and education cannot assist in cleaning to a certain extent, and teachers are required to move the drawing device many times to erase the image, thereby increasing the workload of teachers to a certain extent. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the front three-dimensional structure of the present invention;

[0028] Figure 2 It is a rear-view stereoscopic structural schematic diagram of the present invention;

[0029] Figure 3 It is a schematic diagram of the AA cross-section three-dimensional structure of the present invention;

[0030] Figure 4 It is a schematic diagram of the three-dimensional structure of the guide device of the present invention;

[0031] Figure 5 It is a schematic diagram of the three-dimensional structure of the limiting device of the present invention;

[0032] Figure 6 It is a schematic diagram of the three-dimensional structure of the auxiliary device of the present invention;

[0033] Figure 7 It is a schematic diagram of the three-dimensional structure of the cleaning device of the present invention;

[0034] Figure 8 It is a schematic diagram of the BB cross-section three-dimensional structure of the present invention;

[0035] Fig. 9 It is a schematic diagram of the three-dimensional structure of the connecting device of the present invention;

[0036] Fig.10 It is a schematic diagram of the FF cross-section three-dimensional structure of the present invention;

[0037] Fig.11 It is a schematic diagram of the enlarged structure of position E of the present invention;

[0038] Fig.12 It is a schematic diagram of the GG cross-section three-dimensional structure of the present invention;

[0039] Fig.13 It is a schematic diagram of the enlarged structure of the H portion of the present invention;

[0040] Fig.14 It is a schematic diagram of the three-dimensional structure of the positioning device of the present invention;

[0041] Fig.15 It is a schematic diagram of the JJ cross-section three-dimensional structure of the present invention.

[0042] In the figure: 1 guide device, 11 anti-sliding block, 12 rotating disk, 13 rotating belt, 14 function track, 15 guide track, 16 transmission shaft, 2 positioning device, 21 auxiliary frame, 22 square hole 1, 23 ventilation shell, 24 negative pressure suction nozzle, 25 square hole 2, 26 connecting air block, 27 suction cylinder, 28 suction rod, 29 limit rail, 210 limit rod, 211 connecting plate, 212 pressure plate, 213 limit block, 214 handle, 215 suction spring, 3 support device, 31 support box, 32 sliding groove, 33 transparent window, 34 inspection cover, 4 connecting device, 41 toggle plate, 42 annular disk, 43 arc groove, 44 clamping plate, 45 guide groove, 46 arc column, 47 return spring, 48 fixed column, 49 guide block, 410 elastic layer, 5 folding device, 51 follower plate, 52 matching hole, 53 sliding block, 54 folding plate, 55 pulling block, 56 hinge seat, 57 adjustable hinge groove, 58 hinge column, 59 Limiting groove, 510 pushing spring, 511 limiting plate, 512 clamping block, 513 clamping groove, 514 receiving groove, 515 connecting block, 516 connecting groove, 517 fixing plate, 6 cleaning device, 61 gear plate, 62 positioning shaft, 63 rotating plate, 64 power tooth plate, 65 hinge plate, 66 matching hinge groove, 67 power plate, 68 torsion spring, 69 auxiliary shaft, 610 groove, 611 auxiliary rod, 612 moving groove, 613 moving plate, 61 4 pulling plate, 615 cleaning brush 1, 616 friction pad, 617 cleaning brush 2, 618 positioning seat, 7 limiting device, 71 positioning rod, 72 fixed block, 73 positioning block, 74 power handle, 75 power rod, 76 positioning groove, 77 horizontal plate, 78 limiting groove 1, 79 vertical plate, 710 limiting groove 2, 711 track column, 8 auxiliary device, 81 reinforcement plate, 82 tensioning spring, 83 telescopic rod, 84 cleaning brush, 85 tensioning block, 86 tensioning shaft. DETAILED DESCRIPTION

[0043] 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.

[0044] See also Figure 1-15 , the present invention provides a technical solution of a drawing device for higher vocational mathematics education:

[0045] A limiting device 7 is arranged at the left end inside the supporting device 3, and the limiting device 7 is fixedly connected to the folding device 5, and the right end of the folding device 5 is fixedly connected to the connecting device 4, a positioning device 2 is arranged at the center of the supporting device 3, an auxiliary device 8 is arranged at the right end inside the supporting device 3, and a guiding device 1 is arranged at the lower end inside the supporting device 3, and the guiding device 1 is movably connected to the auxiliary device 8 and the limiting device 7.

[0046] The support device 3 includes a support box 31, a transparent window 33 is provided at the left end of the upper side of the support box 31, an inspection cover 34 is movably connected to the left end of the support box 31, a sliding groove 32 is opened on the upper side of the right end wall of the support device 3, and a folding device 5 is movably connected in the sliding groove 32.

[0047] The folding device 5 includes a follower plate 51, a receiving groove 514 is provided inside the follower plate 51, a plurality of snap-in grooves 513 are evenly provided on the inner wall at the lower end of the receiving groove 514, one of the plurality of snap-in grooves 513 is movably connected with a snap-in block 512, a limiting plate 511 is fixedly connected to the upper end of the snap-in block 512, the limiting plate 511 is movably connected in the limiting groove 59, the limiting groove 59 is provided at the left end of the folding plate 54, two ends of a push spring 510 are fixedly connected to the opposite surfaces of the limiting groove 59 and the limiting plate 511, the front and rear sides of the right end of the folding plate 54 are fixedly connected with a pulling block 55, and the front and rear ends of the right side of the folding plate 54 are fixedly connected to the hinge seat 5 6. The two hinge seats 56 are each provided with an adjustable hinge groove 57, and the two adjustable hinge grooves 57 are each movably connected with a hinge column 58, so as to facilitate the staff to rotate and fold the movable position. The opposite surfaces of the two hinge columns 58 are fixedly connected to the fixed plate 517, and the left end of the fixed plate 517 is fixedly connected with a connecting block 515, and the connecting block 515 is movably connected in the connecting groove 516. The connecting groove 516 is provided at the right end of the folding plate 54, and the fixed plate 517 is fixedly connected with a connecting device 4. The right end of the follower plate 51 is arranged at the right end of the support box 31 through the matching hole 52, and the matching hole 52 is provided in the sliding block 53, and the sliding block 53 is movably connected in the sliding groove 32.

[0048] The guide device 1 includes a rotating belt 13, and the left and right ends of the rotating belt 13 are movably connected with a transmission shaft 16, and the front and rear ends of the two transmission shafts 16 are movably connected to the support box 31. The front and rear ends of the left end transmission shaft 16 are fixedly connected with a rotating disk 12, and the back surfaces of the two rotating disks 12 are fixedly connected with a plurality of anti-sliding blocks 11. A plurality of function tracks 14 are evenly opened on the outer surface of the rotating belt 13, so as to achieve the purpose of facilitating high-level mathematics teachers to draw different function images. The rear ends of the plurality of function tracks 14 are connected to a guide track 15, and the guide track 15 is opened on the outer surface of the rear end of the rotating belt 13.

[0049] The auxiliary device 8 includes a reinforcement plate 81, which is fixedly connected to the inner wall of the right end of the support box 31. Telescopic rods 83 are fixedly connected to the lower side surfaces of the front and rear ends of the reinforcement plate 81. The lower ends of the two telescopic rods 83 are fixedly connected to tensioning blocks 85. The two tensioning blocks 85 are respectively movably connected to the optical axes at the front and rear ends of the tensioning shaft 86. The upper end of the tensioning shaft 86 is movably connected to the lower end of the rotating belt 13. Tensioning springs 82 are sleeved on the two telescopic rods 83. The two ends of the two tensioning springs 82 are respectively fixedly connected to the opposite surfaces of the two tensioning blocks 85 and the reinforcement plate 81. A cleaning brush 84 is fixedly connected to the lower side surface of the reinforcement plate 81, and the cleaning brush 84 is movably connected to the upper outer side surface of the rotating belt 13.

[0050] The limiting device 7 includes a track column 711, the upper end of which is fixedly connected to a follower plate 51, and the lower end of the track column 711 is movably connected to a limited groove 1 78 and a limited groove 2 710, the limited groove 1 78 is arranged on a transverse plate 77, and the front and rear ends of the transverse plate 77 are fixedly connected to positioning blocks 73, and the two positioning blocks 73 are respectively movably connected to two positioning grooves 76, and the two positioning grooves 76 are respectively arranged in two fixed blocks 72, and the two fixed blocks 72 are respectively fixedly connected to the front and rear inner walls of the support box 31, and the limited groove 2 710 is arranged on a vertical plate 79, and the left and right ends of the vertical plate 79 are movably connected to positioning rods 71, and the front and rear ends of the two positioning rods 71 ​​are respectively fixedly connected to the front and rear inner walls of the support box 31, and the front side wall of the vertical plate 79 One end of a power rod 75 is fixedly connected to the upper part, and the other end of the power rod 75 passes through the front side wall of the support box 31 and is fixedly connected to a power handle 74. The limiting groove 78 cooperates with the transverse plate 77 to move laterally. During the movement of the transverse plate 77, the positioning grooves 76 opened in the two fixed blocks 72 will cooperate with the two positioning blocks 73 to perform auxiliary limiting, and then the follower plate 51 will be driven to move through the track column 711. When the follower plate 51 moves, the sliding block 53 will cooperate with the matching hole 52 to move in the sliding groove 32 for auxiliary limiting. During the movement of the follower plate 51, the folding plate 54 and the two annular disks 42 will be driven to move. When the annular disk 42 moves, it will drive the chalk or marker to follow the function track 14 to draw the required function image on the blackboard or whiteboard.

[0051] The positioning device 2 includes a handle 214, and the handle 214 is fixedly connected to the center of the upper side of the support box 31. The front and rear ends of the handle 214 are provided with limit rails 29, and the two limit rails 29 are fixedly connected to the upper side of the support box 31. The inner walls of the opposite surfaces of the two limit rails 29 are fixedly connected to limit rods 210, and the two limit rods 210 are respectively movably connected to two limit blocks 213, and the two limit blocks 213 are respectively movably connected in the two limit rails 29. The two limit rods 210 are sleeved A return spring 47 is connected, so that the pressure plate 212 can be easily pressed downward in cooperation with the handle 214 to achieve the purpose of exhausting and sucking gas positioning. The two ends of the two return springs 47 are respectively fixedly connected to the two limit blocks 213 and the opposite surfaces of the two limit rods 210. The upper ends of the two limit blocks 213 are movably connected to one end of the connecting plate 211 through a hinge seat, and the other ends of the two connecting plates 211 are movably connected to the lower end of the pressure plate 212 through another two hinge seats. The front and rear ends of the pressure plate 212 are fixedly connected to the suction rod 28.

[0052] The lower ends of the two suction rods 28 are provided with movable plugs and movably connected in the two suction cylinders 27. The two suction cylinders 27 are respectively fixedly connected to the front and rear sides of the support box 31. The lower ends of the two suction cylinders 27 are respectively fixedly connected to two air connecting blocks 26. The two air connecting blocks 26 are respectively fixedly connected to the front and rear inner walls of the auxiliary frame 21. The two air connecting blocks 26 pass through the auxiliary frame 21 and are connected to the ventilation shell 23. The lower end of the ventilation shell 23 is fixedly connected to two negative pressure suction nozzles 24. Square hole 1 22 and square hole 25 are respectively provided on the left and right side walls at the center of the auxiliary frame 21. The two suction rods 28 move downward to cooperate with the two air connecting blocks 26, the ventilation shell 23 and the two negative pressure suction nozzles 24 to empty the air of the two suction cylinders 27. Then the auxiliary frame 21 can be placed at a suitable position on the blackboard or whiteboard, which is convenient for high-level mathematics teachers to use and achieve the purpose of efficient drawing.

[0053] The cleaning device 6 includes a positioning seat 618, and the positioning seat 618 is fixedly connected to the right side surface of the auxiliary frame 21 corresponding to the square hole 25. The positioning seat 618 is movably connected to the lower end of the positioning shaft 62, and the outer side surface of the upper end of the positioning shaft 62 is fixedly connected to the gear plate 61 and the rotating plate 63. A moving groove 612 is opened in the rotating plate 63, and a moving plate 613 is movably connected in the moving groove 612. A friction pad 616 is movably connected to the upper side surface of the moving plate 613, so as to position the moving plate 613 after movement. The friction pad 616 is fixedly connected to the inner wall of the upper end of the moving groove 612, and a cleaning brush 617 is fixedly connected to the lower end of the moving plate 613. Cleaning brush 1 615 is fixedly connected to both the left and right ends of the lower side surface of the rotating plate 63. A pulling plate 614 is fixedly connected to the rear side surface of the moving plate 613. The gear plate 61 passes through the square hole 25 for transmission. A power tooth plate 64 is connected, and the power tooth plate 64 is movably connected to an auxiliary rod 611. The front and rear ends of the auxiliary rod 611 are respectively fixedly connected to the front and rear inner walls of the auxiliary frame 21. The left end of the power tooth plate 64 is fixedly connected to a hinge plate 65. The hinge plate 65 is hinged with a matching hinge groove 66, so that the power tooth plate 64 can move stably with the assistance of the auxiliary rod 611. The matching hinge groove 66 is provided at the right end of the power plate 67. A groove 610 is provided at the center of the power plate 67. An auxiliary shaft 69 is movably connected in the groove 610. The auxiliary shaft 69 is fixedly connected to the lower side surface of the ventilation shell 23. One end of a torsion spring 68 is fixedly connected to the inner wall of the lower end of the groove 610, and the other end of the torsion spring 68 is fixedly connected to the upper side surface of the ventilation shell 23. The torsion spring 68 is sleeved on the auxiliary shaft 69. The left end of the power plate 67 passes through a square hole 22 and is arranged at the left end of the auxiliary frame 21.

[0054] The connecting device 4 includes two annular disks 42, a fixing plate 517 is fixedly connected to the left side surface of the upper annular disk 42, and the lower side surface of the upper annular disk 42 is connected to the lower annular disk 42 through three fixing columns 48. The three fixing columns 48 are movably connected in three arc grooves 43. The three arc grooves 43 are opened on three clamping plates 44. The three clamping plates 44 are arranged in a fan shape. The outer sides of the three clamping plates 44 are fixedly connected to the toggle plates 41. The three clamping plates 44 An elastic layer 410 is fixedly connected to the inner wall at the center, and guide grooves 45 are provided on the inner walls of the three arc grooves 43. Guide blocks 49 are movably connected in the three groups of two-by-two guide grooves 45. The three groups of two-by-two guide blocks 49 are respectively fixedly connected to the outer surfaces of the three fixed columns 48. The three groups of two-by-two guide blocks 49 are movably connected to the arc columns 46. The two ends of the three groups of two-by-two arc columns 46 are respectively fixedly connected to the inner walls of the three groups of two-by-two guide grooves 45. The arc columns 46 are all sleeved with return springs 47, and the two ends of the return springs 47 are respectively fixedly connected with three groups of guide blocks 49 in groups of two and three groups of guide grooves 45 in groups of two. On the opposite surface of one side near the center, the auxiliary shaft 69 supports stable rotation. When the power plate 67 rotates, the torsion force generated by the torsion spring 68 and the groove 610 will be overcome. When the power plate 67 rotates, it will drive the power tooth plate 64 to move left and right through the matching hinge groove 66 and the hinge plate 65. When the power tooth plate 64 moves left and right, the auxiliary rod 611 will be used to limit the position to ensure the stability of the movement. When the power tooth plate 64 moves left and right, the gear plate 61 can be driven to rotate. During the rotation of the gear plate 61, the positioning shaft 62 will be driven to rotate. The relative position of the positioning shaft 62 will be guaranteed with the assistance of the positioning seat 618. During the rotation of the positioning shaft 62, the rotating plate 63 will be driven to rotate in a fan-shaped cycle, and then the chalk or marker notes will be cleaned through the two cleaning brushes 1 615 and the two cleaning brushes 2 617.

[0055] The specific operation mode of the present invention is:

[0056] When it is necessary to roughly draw a function graph on a blackboard or a whiteboard, the high mathematics teacher can cooperate with the handle 214 to press the pressure plate 212 to move downward. In the process of the pressure plate 212 moving downward, the two connecting plates 211 will cooperate with the four corresponding hinge seats to make the lower ends of the two connecting plates 211 approach each other. In the process of the lower ends of the two connecting plates 211 approaching each other, the two limit blocks 213 will be driven to ensure the stability of movement under the two limit rods 210 and the two limit rails 29. At the same time, the pulling force of the two suction springs 215 will be overcome, and then the two suction rods 28 will be driven to move downward. The two suction rods 28 move downward to cooperate with the two air connecting blocks 26, the ventilation shell 23 and The two negative pressure suction nozzles 24 exhaust the air in the two suction cylinders 27, and then the auxiliary frame 21 can be placed at a suitable position of the blackboard or whiteboard, and then the pressure plate 212 can be loosened to allow the two suction springs 215 to drive the two limit blocks 213 to move away from each other. When the two limit blocks 213 move away from each other, the two connecting plates 211 can be cooperated to move the pressure plate 212 upward to reset. In this process, the two suction rods 28 can be driven to move upward in the two suction cylinders 27, and then the two connecting blocks 26, the ventilation shells 23 and the two negative pressure suction nozzles 24 can be cooperated to suck air, and then the positions of the auxiliary frame 21 and the support box 31 can be relatively positioned by the two negative pressure suction nozzles 24;

[0057] After the auxiliary frame 21 and the support box 31 are relatively positioned, the support box 31 can be pressed by the handle 214 while the fixing plate 517 can be pulled to rotate and place horizontally with the assistance of the two hinge columns 58 and the two adjusting hinge grooves. Then, the fixing plate 517 can be moved to the left so that the connecting block 515 is inserted into the connecting groove 516 to position the upper annular disk 42. At the same time, the annular disk 42 at the lower end can be positioned by the three fixing columns 48. Then, the folding plate 54 can be driven to move to the right by the two pulling blocks 55. In the process of the folding plate 54 moving to the right, the limiting plate 511 can move the clamping block 512 downward through the pushing spring 510 and the limiting groove 59, so that the clamping block 512 can cooperate with the multiple clamping grooves 513 to position the folding plate 54 in the storage groove 514. At the same time, it is convenient for high-level mathematics teachers to pull the folding plate 54 out of the storage groove 514 for use according to their needs. At the same time, the above operation will be repeated to position the adjusted position. After use, the above operation can be reversed to fold the folding plate 54 for easy carrying.

[0058] After the folding plate 54 and the two annular disks 42 are properly adjusted, one of the three toggle plates 41 can be toggled. After toggling one of the three toggle plates 41, the corresponding clamping plate 44 will be driven to move. During the movement of the clamping plate 44, the arc groove 43 cooperates with the fixed column 48 to limit the position, so that the clamping plate 44 moves in an arc shape. Then, the center of the three clamping plates 44 can be notched, and then the high-level mathematics teacher can place a marker or chalk at the center of the three clamping plates 44, and then the corresponding toggle plate 41 can be released to release the corresponding clamping plate 44. After the corresponding clamping plates 44 are moved, the two guide blocks 49 can be pulled to reset in the two corresponding guide grooves 45 by the two corresponding return springs 47. During the reset process, the two corresponding arc columns 46 cooperate with the two guide blocks 49 to assist in limiting. Then, the chalk or marker can be relatively positioned between the three clamping plates 44, and the three elastic layers 410 can be used to protect the chalk or marker from being clamped. At the same time, three groups of return springs 47 in pairs can be used to clamp and position the chalk or marker to the circular part of the two annular disks 42 for use.

[0059] After positioning the chalk or marker, one of the two rotating disks 12 can be rotated, and at the same time, two sets of anti-slip blocks 11 can be used to prevent slipping, and then the rotating shaft at the left end can be driven to rotate. The rotation of the rotating shaft at the left end will cooperate with the rotating shaft at the right end to drive the rotating belt 13 to rotate. During the rotation of the rotating belt 13, the function track 14 set on the outer surface of the rotating belt 13 will be rotated. When rotating to select a suitable function track, the guide track 15 will cooperate with the track column 711 for stable movement. During the rotation of the function track 14, the high-level mathematics teacher can observe through the transparent window 33, and the rotation can be stopped when it rotates to the function image to be drawn. Next, the power handle 74 can be used to drive the power rod 75 to move. During the movement of the power rod 75, the vertical plate 79 will be driven to move. The movement of the vertical plate 79 will drive the limit slot 2 710 to move. The track column 711 is moved to a moving position, and then the track column 711 can be moved forward. When the track column 711 moves to a moving position forward, it will move with the corresponding function track 14. In this process, it will also move laterally with the horizontal plate 77 through the limiting groove 1 78. During the movement of the horizontal plate 77, the positioning grooves 76 provided in the two fixed blocks 72 will cooperate with the two positioning blocks 73 for auxiliary limiting. Then, the track column 711 will drive the follower plate 51 to move. When the follower plate 51 moves, the sliding block 53 will cooperate with the matching hole 52 to move in the sliding groove 32 for auxiliary limiting. During the movement of the follower plate 51, the folding plate 54 and the two annular disks 42 will be driven to move. When the annular disk 42 moves, it will drive the chalk or marker to follow the function track 14 to draw the required function image on the blackboard or whiteboard.

[0060] After use, you can also press the handle 214 and cooperate with the pulling plate 614 to drive the moving plate 613 to move in the moving groove 612. When the moving plate 613 moves in the moving groove 612, the friction pad 616 will be used to position the moving plate 613 after adjustment. Next, you can move the left end of the power plate 67, and then it can be stably rotated under the support of the auxiliary shaft 69. When the power plate 67 rotates, it will overcome the torsion force generated by the torsion spring 68 and the groove 610. When the power plate 67 rotates, it will drive the power tooth plate 64 to move left and right in a circular motion by cooperating with the hinge groove 66 and the hinge plate 65. When the power toothed plate 64 moves in a circular motion to the left and right positions, the auxiliary rod 611 is used to limit the position to ensure the stability of the movement. When the power toothed plate 64 moves in a circular motion to the left and right positions, the gear plate 61 can be driven to rotate. During the rotation of the gear plate 61, the positioning shaft 62 is driven to rotate. The relative position of the positioning shaft 62 is ensured with the assistance of the positioning seat 618. During the rotation of the positioning shaft 62, the rotating plate 63 is driven to rotate in a fan-shaped circular motion, and then the chalk or marker notes are cleaned by two cleaning brushes 1 615 and two cleaning brushes 2 617, thereby reducing the inconvenience of high-level mathematics teachers drawing different function graphs to a certain extent.

[0061] During the rotation of the rotating belt 13, the two tensioning blocks 85 will move upward through the two telescopic rods 83, the tensioning springs 82 and the reinforcement plate 81, and then the tensioning shaft 86 will be driven to move upward. The upward movement of the tensioning shaft 86 can tension the rotating belt 13 to prevent the function track 14 from wrinkling and causing the track column 711 to move unstably. At the same time, the cleaning brush 84 will be tightly connected to the function track 14 to clean the function track 14, thereby preventing impurities in the function track 14 from affecting the movement of the track column 711 and causing unstable function image drawing.

[0062] In the description of the present invention, it is necessary to understand that the indicated orientation or positional relationship is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to 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.

[0063] In the present invention, unless otherwise clearly stipulated and limited, for example, it can be a fixed connection, a detachable connection, or an integrated one; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. Unless otherwise clearly defined, for ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0064] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A drawing device for higher vocational mathematics education, comprising a supporting device, characterized in that: A limiting device is provided at the left end inside the supporting device, the limiting device is fixedly connected with a folding device, and a guiding device is provided at the lower end inside the supporting device; The folding device comprises a follower plate, a storage groove is provided in the follower plate, and a plurality of clamping grooves are evenly provided on the inner wall of the lower end of the storage groove, and a clamping block is movably connected to one of the plurality of clamping grooves, and the upper end of the clamping block is fixedly connected to a limiting plate, and the limiting plate is movably connected in the limiting groove, and the limiting groove is provided at the left end of the folding plate, and the two ends of the pushing spring are respectively fixedly connected to the opposite surfaces of the limiting groove and the limiting plate, and the right end of the folding plate is fixedly connected to the pulling block at the front and rear sides of the right end of the folding plate, and the front and rear ends of the right side of the folding plate are fixedly connected to the hinge seat, and the two hinge seats are provided with adjustable hinge grooves, and the two adjustable hinge grooves are movably connected with hinge columns, and the opposite surfaces of the two hinge columns are fixedly connected to the fixing plate, and the left end of the fixing plate is fixedly connected with a connecting block, and the connecting block is movably connected in the connecting groove, and the connecting groove is provided at the right end of the folding plate, and the right end of the fixing plate is fixedly connected with a connecting device for positioning chalk or marker pen, and the right end of the follower plate is arranged at the right end of the supporting box through the matching hole; The guide device includes a rotating belt, the left and right ends of the rotating belt are movably connected to a transmission shaft, the front and rear ends of the two transmission shafts are movably connected to the support box, the front and rear ends of the left transmission shaft are fixedly connected to a rotating disk, and the back surfaces of the two rotating disks are fixedly connected to a plurality of anti-sliding blocks, and a plurality of function tracks are evenly opened on the outer side of the rotating belt, and the rear ends of the plurality of function tracks are connected to a guide track, and the guide track is opened on the outer side of the rear end of the rotating belt; The limiting device includes a track column, the upper end of the track column is fixedly connected to the follower plate, the lower end of the track column is movably connected to limited slot one and limited slot two, the limited slot one is arranged on the horizontal plate, the front and rear ends of the horizontal plate are fixedly connected to positioning blocks, the two positioning blocks are respectively movably connected in the two positioning slots, the two positioning slots are respectively arranged in the two fixed blocks, the two fixed blocks are respectively fixedly connected to the front and rear inner walls of the support box, the limited slot two is arranged on the vertical plate, the left and right ends of the vertical plate are movably connected with positioning rods, the front and rear ends of the two positioning rods are respectively fixedly connected to the front and rear inner walls of the support box, one end of a power rod is fixedly connected to the front side wall of the vertical plate, and the other end of the power rod passes through the front side wall of the support box and is fixedly connected to the power handle.

2. A drawing device for higher vocational mathematics education according to claim 1, characterized in that: The support device comprises a support box, a transparent window is arranged at the left end of the upper side of the support box, an inspection cover is movably connected to the left end of the support box, a sliding groove is arranged on the upper side of the right end wall of the support device, and a folding device is movably connected in the sliding groove; The matching hole is arranged in the sliding block, and the sliding block is movably connected in the sliding groove.

3. A drawing device for higher vocational mathematics education according to claim 2, characterized in that: An auxiliary device is provided at the right end inside the supporting device, and the auxiliary device includes a reinforcing plate, which is fixedly connected to the inner wall of the right end of the supporting box, and telescopic rods are fixedly connected to the lower side surfaces of the front and rear ends of the reinforcing plate, and the lower ends of the two telescopic rods are fixedly connected to tensioning blocks, and the two tensioning blocks are movably connected to the optical axes at the front and rear ends of the tensioning shaft respectively, and the upper end of the tensioning shaft is movably connected to the lower end of the rotating belt, and the two telescopic rods are sleeved with tensioning springs, and the two ends of the two tensioning springs are respectively fixedly connected to the opposite surfaces of the two tensioning blocks and the reinforcing plate, and a cleaning brush is fixedly connected to the lower side surface of the reinforcing plate, and the cleaning brush is movably connected to the upper outer side surface of the rotating belt.

4. A drawing device for higher vocational mathematics education according to claim 3, characterized in that: A positioning device is provided at the center of the supporting device, and the positioning device includes a handle, the handle is fixedly connected to the center of the upper side surface of the supporting box, and limit rails are provided at the front and rear ends of the handle, the two limit rails are fixedly connected to the upper side surface of the supporting box, and the inner walls of the opposite surfaces of the two limit rails are fixedly connected to limit rods, and the two limit rods are respectively movably connected to two limit blocks, and the two limit blocks are respectively movably connected in the two limit rails, and the two limit rods are respectively sleeved with return springs, and the two ends of the two return springs are respectively fixedly connected to the opposite surfaces of the two limit blocks and the two limit rods on the back sides, the upper ends of the two limit blocks are movably connected to one end of the connecting plate through a hinge seat, and the other ends of the two connecting plates are movably connected to the lower end of the pressing plate through other two hinge seats, and the front and rear ends of the pressing plate are fixedly connected with suction rods.

5. A drawing device for higher vocational mathematics education according to claim 4, characterized in that: The lower ends of the two suction rods are each provided with a movable plug movably connected in the two suction cylinders, the two suction cylinders are respectively fixedly connected to the front and rear side surfaces of the support box, the lower ends of the two suction cylinders are respectively fixedly connected to two air connecting blocks, the two air connecting blocks are respectively fixedly connected to the front and rear inner walls of the auxiliary frame, the two air connecting blocks are both connected to a ventilation shell through the auxiliary frame, the lower end of the ventilation shell is fixedly connected to two negative pressure suction nozzles, and square hole one and square hole two are respectively opened on the left and right side walls at the center of the auxiliary frame.

6. A drawing device for higher vocational mathematics education according to claim 5, characterized in that: The drawing device includes a cleaning device, and the cleaning device includes a positioning seat, and the positioning seat is fixedly connected to the right side surface of the auxiliary frame corresponding to the second square hole, the positioning seat is movably connected to the lower end of the positioning shaft, and the outer side surface of the upper end of the positioning shaft is fixedly connected to a gear plate and a rotating plate, a movable groove is opened in the rotating plate, and a movable plate is movably connected in the movable groove, and a friction pad is movably connected to the side surface of the movable plate, and the friction pad is fixedly connected to the inner wall of the upper end of the movable groove, and the lower end of the movable plate is fixedly connected to a cleaning brush, and the left and right ends of the lower side surface of the rotating plate are fixedly connected to a cleaning brush, and the rear side surface of the movable plate is fixedly connected to a pulling plate, and the gear plate is passed through A power tooth plate is connected through square hole two for transmission, and the power tooth plate is movably connected with an auxiliary rod, and the front and rear ends of the auxiliary rod are respectively fixedly connected to the front and rear inner walls of the auxiliary frame, and the left end of the power tooth plate is fixedly connected with a hinge plate, and the hinge plate is hinged with a matching hinge groove, and the matching hinge groove is opened at the right end of the power plate, and a groove is opened at the center of the power plate, and an auxiliary shaft is movably connected in the groove, and the auxiliary shaft is fixedly connected to the lower side surface of the ventilation shell, and one end of the torsion spring is fixedly connected to the inner wall of the lower end of the groove, and the other end of the torsion spring is fixedly connected to the upper side surface of the ventilation shell, and the torsion spring is sleeved on the auxiliary shaft, and the left end of the power plate passes through square hole one and is arranged at the left end of the auxiliary frame.

7. A drawing device for higher vocational mathematics education according to claim 6, characterized in that: The connecting device comprises two annular disks, the fixing plate is fixedly connected to the left side surface of the upper annular disk, and the lower annular disk is connected to the three side annular disk through three fixing posts on the lower side surface of the upper annular disk, the three fixing posts are movably connected in the three arc grooves, the three arc grooves are arranged on the three clamping plates, the three clamping plates are fan-shaped, and the inner walls at the centers of the three clamping plates are fixedly connected with elastic layers, and guide grooves are arranged on the inner walls of the three arc grooves, and guide blocks are movably connected in the three groups of two-two groups of guide grooves, and the guide blocks in the three groups of two-two groups are respectively fixedly connected to the outer sides of the three fixed posts, and the guide blocks in the three groups of two-two groups are movably connected with arc posts, and the two ends of the arc posts in the three groups of two-two groups are respectively fixedly connected to the inner walls of the three groups of two-two groups of guide grooves, and the arc posts in the three groups of two-two groups are sleeved with return springs, and the two ends of the return springs in the three groups of two-two groups are respectively fixedly connected to the three groups of two-two groups of guide blocks and the opposite surface of the three groups of two-two groups of guide grooves near the center that is opposite to the guide block.

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