Multipurpose drawing device for mathematics teaching

Abstract

The invention discloses a multipurpose drawing device for mathematics teaching, and relates to the technical field of teaching aids, the multipurpose drawing device comprises a drawing board, cavities are formed in the left and right sides in the drawing board, elastic positioning columns which slidably penetrate through the cavities and are fixed through positioning mechanisms are arranged on the left and right sides of the drawing board, and anti-skid rubber cones are rotatably connected to the bottom ends of the elastic positioning columns; arc-shaped pressing plates are fixed at the top ends of the elastic positioning columns; a teacher can draw a standard straight line along the side wall of the side, close to the second scale line, of the drawing board, and the teacher can draw a standard circle on the blackboard by rotating the drawing board with the anti-skid rubber cone at the bottom end of the anti-skid rubber cone as the circle center. In addition, the rotary adjusting mechanism drives the supporting shaft on the inner side of the groove to drive the angle drawing graduated scale to rotate to the outside of the groove, so that the teacher can draw a standard geometric angle on the blackboard along the angle drawing graduated scale and the rear side wall of the drawing board; therefore, the multipurpose drawing device for mathematics teaching can meet different drawing requirements in the mathematics teaching process at the same time.

Description

Technical Field

[0001] The present invention relates to the technical field of teaching tools, in particular to a multi-purpose drawing device for mathematics teaching. Background Art

[0002] Mathematics is a discipline that studies concepts such as quantity, structure, change, space, and information. Mathematics teaching refers to the process in which teachers impart mathematical knowledge, skills, and ideas to students through certain methods and means, and cultivate students' mathematical thinking ability, problem-solving ability, and interest and attitude towards mathematics. In the process of mathematics teaching, when teachers teach students geometry knowledge, they usually need to draw graphics such as straight lines, circles, and squares on the blackboard to assist teaching.

[0003] At present, teachers generally need to use different drawing tools when drawing geometric figures, such as using a ruler to draw a straight line and a compass to draw a circle. Although standard geometric figures can be drawn with the help of different drawing tools, switching back and forth between different drawing tools is time-consuming and labor-intensive, and inconvenient to use, which reduces the teacher's drawing efficiency and teaching quality. Therefore, the present invention proposes a multi-purpose drawing device for mathematics teaching to solve the problems existing in the prior art. Summary of the Invention

[0004] In response to the above problems, the purpose of the present invention is to propose a multi-purpose drawing device for mathematics teaching, which solves the problem that in the current mathematics teaching process, teachers need to use different auxiliary drawing tools to draw different geometric figures in a standard way, and frequently switching between different auxiliary drawing tools will affect drawing efficiency and teaching quality.

[0005] In order to achieve the purpose of the present invention, the present invention is implemented through the following technical solutions: a multi-purpose drawing device for mathematics teaching, including a drawing board, wherein cavities are opened on the left and right sides of the drawing board, and elastic positioning columns are provided on the left and right sides of the drawing board to slide through the cavities and are fixed by a positioning mechanism, the bottom end of the elastic positioning column is rotatably connected to a non-slip rubber cone, and the top end of the elastic positioning column is fixed with an arc pressure plate, a through groove corresponding to the position of the cavity is opened in the middle of the drawing board, and a sliding displacement driven by a transverse adjustment mechanism is provided inside the through groove. A movable column, the bottom end of the movable column is fixed with a drawing chalk through an elastic snap-fit ​​mechanism, the top of the movable column is fixed with a diamond pointer, the top of the drawing board is printed with first scale lines located in front and behind the diamond pointer, the front side of the top of the drawing board is printed with second scale lines, the back side of the drawing board is symmetrically provided with grooves, the inner side of the groove is rotatably connected to a support shaft driven to rotate by a rotation adjustment mechanism, a connecting plate is sleeved on the support shaft, the end of the connecting plate away from the support shaft is fixed with an angle scale, and the back side of the top of the drawing board is slidably connected to a protractor.

[0006] A further improvement is that: a connecting block is symmetrically fixed to the front side wall of the protractor, a T-shaped slider is fixed to the bottom end of the connecting block, and a T-shaped slide rail adapted to the T-shaped slider is opened on the top of the drawing board.

[0007] A further improvement is that the rotation adjustment mechanism includes a driving chamber opened on the front side of the groove and a first screw rod rotatably connected to the driving chamber, a threaded block is threadedly sleeved on the first screw rod, a rack is fixed to one end of the threaded block close to the support shaft, a rotating gear meshing with the rack is sleeved on the support shaft, and the opposite ends of the two groups of the first screw rods are both passed through bearings to the outside of the drawing board and are fixed with a first knob.

[0008] A further improvement is that a blocking piece is sleeved on the elastic positioning column, a first limiting spring sleeved on the outside of the elastic positioning column is fixed to the top of the blocking piece, and the top of the first limiting spring is fixed to the top of the cavity.

[0009] A further improvement is that the positioning mechanism includes positioning bolts with threads running through both sides of the drawing board and positioning grooves provided on the side walls of the elastic positioning columns, and the positioning grooves are adapted to the positioning bolts.

[0010] Further improvements are: the lateral adjustment mechanism includes a second knob and a second screw rod rotatably connected to the inside of the through slot, the bottom end of the second knob is fixed with a rotating shaft, the bottom end of the rotating shaft passes through the inside of the drawing board through a bearing and is fixed with a first bevel gear, and the end of the second screw rod close to the first bevel gear is fixed with a second bevel gear meshing with the first bevel gear.

[0011] A further improvement is that the elastic snap-fit ​​mechanism includes a circular groove opened at the bottom end of the movable column and a second limit spring fixed to the top end of the circular groove; the bottom end of the second limit spring is fixed with a snap-fit ​​sleeve slidably connected to the inside of the circular groove; the inner wall of the snap-fit ​​sleeve is fixed with an elastic rubber sleeve; the upper part of the drawing chalk is interference fit in the elastic rubber sleeve.

[0012] Further improvements are: a storage groove is symmetrically opened on the front side of the drawing board, a chalk storage box is slidably connected to the inside of the storage groove, the front side of the drawing board is rotatably connected to a rotating block that is symmetrically distributed on the left and right, the side of the rotating block close to the chalk storage box is connected to the limiting block through a third limiting spring, a non-slip rubber pad is fixed to the bottom surface of the drawing board, and a spirit level is embedded and fixed on the top of the drawing board.

[0013] The beneficial effects of the present invention are as follows: the present invention attaches the square drawing board to the surface of the blackboard, so that the teacher can draw a standard straight line along the side wall of the drawing board near the second scale line, and by clamping the drawing chalk at the bottom end of the movable column and rotating the drawing board with the non-slip rubber cone at the bottom end of the non-slip rubber cone as the center of the circle, the teacher can draw a standard circle on the blackboard, and the rotation adjustment mechanism drives the support shaft inside the groove to rotate to the outside of the groove until an angle is formed between the angle scale and the rear side wall of the drawing board, so that the teacher can draw a standard geometric angle on the blackboard along the angle scale and the rear side wall of the drawing board, so that the multi-purpose drawing device for mathematics teaching can simultaneously meet different drawing requirements in the mathematics teaching process without the need for teachers to frequently switch between different drawing tools, thereby improving the teacher's drawing efficiency and bringing convenience to the teacher's mathematics teaching work. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 is a top view of the present invention;

[0015] Figure 2 is a top cross-sectional view of the present invention;

[0016] Figure 3 The present invention Figure 2 A magnified view of point A in the figure;

[0017] Figure 4 The present invention Figure 2 Enlarged view of point B in FIG.

[0018] Figure 5 The present invention Figure 2 Enlarged view of point C in the figure;

[0019] Figure 6 is a front cross-sectional view of the present invention;

[0020] Figure 7 The present invention Figure 6 The enlarged view of point D in the figure;

[0021] Figure 8 It is a rear view of the present invention;

[0022] Figure 9 is a cross-sectional view of the movable column and the clamping sleeve of the present invention;

[0023] Figure 10 It is a schematic diagram of the three-dimensional structure of the protractor of the present invention.

[0024] Among them: 1. Drawing board; 2. Cavity; 3. Elastic positioning column; 4. Anti-slip rubber cone; 5. Arc pressure plate; 6. Through slot; 7. Moving column; 8. Drawing chalk; 9. Diamond pointer; 10. First scale mark; 11. Second scale mark; 12. Groove; 13. Support shaft; 14. Connecting plate; 15. Angle scale; 16. Protractor; 17. Connecting block; 18. T-type slider; 19. T-type slide rail; 20. Drive cavity; 21. First screw rod; 22. Threaded block; 23. Rack; 24. Rotary Gear; 25. First knob; 26. Block; 27. First limit spring; 28. Positioning bolt; 29. ​​Positioning slot; 30. Second knob; 31. Second screw rod; 32. Rotating shaft; 33. First bevel gear; 34. Second bevel gear; 35. Circular slot; 36. Second limit spring; 37. Snap-fit ​​sleeve; 38. Elastic rubber sleeve; 39. Storage slot; 40. Chalk storage box; 41. Rotating block; 42. Third limit spring; 43. Limit block; 44. Anti-slip rubber pad; 45. Level. DETAILED DESCRIPTION

[0025] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0026] Mathematics is a universal means for humans to rigorously describe and deduce abstract structures and patterns of things. It can be applied to any problem in the real world. All mathematical objects are essentially human-defined. In this sense, mathematics belongs to the formal sciences, not the natural sciences. Different mathematicians and philosophers have a range of views on the exact scope and definition of mathematics. Mathematics plays an irreplaceable role in the development of human history and social life, and is also an essential basic tool for the study and research of modern science and technology.

[0027] Mathematics teaching refers to the process in which teachers impart mathematical knowledge, skills and ideas to students through certain methods and means, and cultivate students' mathematical thinking ability, problem-solving ability, and interest and attitude towards mathematics. There are many mathematical teaching strategies. Among them, the intuitive teaching strategy uses specific images, physical objects or multimedia tools to demonstrate mathematical concepts, formulas and principles to help students establish intuitive understanding. The heuristic teaching method focuses on cultivating students' logical thinking ability and independent learning ability, and stimulates students' curiosity by raising questions and guiding discussions. The practical application strategy emphasizes the practical application of mathematical knowledge, designs mathematical problems with practical backgrounds, and guides students to use the knowledge they have learned to solve practical problems.

[0028] In the process of mathematics teaching, teachers generally need to use a variety of different drawing tools when drawing geometric figures, which brings inconvenience to teachers' mathematics teaching work.

[0029] Regarding the problems existing in the above-mentioned prior art, see Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 、 Figure 5 、 Figure 6 、 Figure 7 、 Figure 8 、 Figure 9 、 Figure 10The present embodiment provides a multi-purpose drawing device for mathematics teaching, comprising a square drawing board 1 and cavities 2 on the left and right sides of the drawing board 1. Elastic positioning columns 3 are provided on both sides of the drawing board 1, and the elastic positioning columns 3 slide through the drawing board 1 and the cavity 2 and are fixed by a positioning mechanism, so that the elastic positioning columns 3 can be easily positioned and fixed after being pressed. The bottom end of the elastic positioning column 3 is rotatably connected to a non-slip rubber cone 4 through a bearing, so that the drawing board 1 and the elastic positioning column 3 can rotate relative to the non-slip rubber cone 4. The top end of the elastic positioning column 3 is fixed with an arc-shaped pressing plate 5 by a bolt, which is convenient for the teacher to press the elastic positioning column 3 to descend. The middle position of the drawing board 1 is provided with a There is a through slot 6 connected up and down, and the through slot 6 is located between the two groups of cavities 2 and corresponds to the position of the cavity 2. A moving column 7 is slidingly provided on the inside of the through slot 6, and the moving column 7 is driven by a lateral adjustment mechanism and performs left and right lateral displacement. A drawing chalk 8 for drawing graphics on the blackboard is fixed to the bottom of the moving column 7 through an elastic snap-fit ​​mechanism. A diamond pointer 9 is fixed to the top of the moving column 7 by a bolt. A first scale line 10 is printed on the top of the drawing board 1. The first scale line 10 is provided with two groups and is respectively located on the front and rear sides of the diamond pointer 9. The arrangement of the diamond pointer 9 and the first scale line 10 makes it easy for the teacher to know the moving distance of the moving column 7. The front side of the top of the drawing board 1 is printed with the first scale line 10. Two scale lines 11 are provided to facilitate teachers to confirm the drawing length when drawing a straight line. The rear side of the drawing board 1 is provided with grooves 12 that are symmetrically distributed on the left and right. The opposite sides of the two sets of grooves 12 are rotatably connected to support shafts 13 through bearings, and the support shafts 13 are driven and rotated by a rotary adjustment mechanism. A connecting plate 14 is fixed on the support shaft 13. The end of the connecting plate 14 away from the support shaft 13 is welded and fixed with an angle scale 15 with its own scale lines. A protractor 16 for measuring the angle between the angle scale 15 and the drawing board 1 is slidably connected to the rear side of the top of the drawing board 1. By attaching the square drawing board 1 to the surface of the blackboard, the teacher can draw along the drawing line. A standard straight line is drawn on the side wall of the drawing board 1 near the second scale line 11, and by clamping the drawing chalk 8 at the bottom of the movable column 7 and rotating the drawing board 1 with the anti-slip rubber cone 4 at the bottom of the anti-slip rubber cone 4 as the center, the teacher can draw a standard circle on the blackboard. In addition, the support shaft 13 inside the groove 12 is driven by the rotary adjustment mechanism to rotate the angle scale 15 to the outside of the groove 12 until an angle is formed between the angle scale 15 and the rear side wall of the drawing board 1, so that the teacher can draw a standard geometric angle on the blackboard along the angle scale 15 and the rear side wall of the drawing board 1, so that the drawing device has a multi-purpose integrated design and can draw different graphics.

[0030] The front side wall of the protractor 16 is fixed with a connecting block 17 which is symmetrically distributed on the left and right by bolts, and a T-shaped slider 18 is fixed to the bottom end of the connecting block 17 by bolts. A T-shaped slide rail 19 is opened on the rear side of the top of the drawing board 1, and the T-shaped slide rail 19 is adapted to the T-shaped slider 18. The T-shaped slider 18 is slidably connected to the T-shaped slide rail 19 to realize the lateral sliding adjustment of the protractor 16, which is convenient for measuring the angles at different positions.

[0031] The rotation adjustment mechanism includes a driving chamber 20 and a first screw rod 21, wherein the driving chamber 20 is provided with two groups and respectively opened on the front side of the two groups of grooves 12. The first screw rod 21 is rotatably connected to the driving chamber 20 through a bearing. A threaded block 22 is threadedly sleeved on the first screw rod 21, and the threaded block 22 slides in contact with the inner wall of the driving chamber 20. The end of the threaded block 22 close to the support shaft 13 is fixed with a rack 23 by bolts, and a rotating gear 24 is sleeved on the support shaft 13, and the rotating gear 24 and the rack 23 are meshed with each other. The opposite ends of the two groups of first screw rods 21 are both passed through bearings to the outside of the drawing board 1 and are fixed with a first knob 25 by bolts. By rotating the first knob 25, the first screw rod 21 is driven to rotate, so that the threaded block 22 threaded on the first screw rod 21 is laterally displaced. During the lateral displacement of the threaded block 22, the rack 23 is driven to displace, and the rack 23 drives the rotating gear 24 meshed with it to rotate, and the rotating gear 24 drives the support shaft 13 to rotate.

[0032] A baffle 26 is sleeved on one side of the elastic positioning column 3 located in the cavity 2, and a first limit spring 27 is fixed to the top of the baffle 26. The first limit spring 27 is movably sleeved on the outside of the elastic positioning column 3, and the top of the first limit spring 27 is fixed to the top inside the cavity 2. The first limit spring 27 provides elastic contraction force for the baffle 26, so that the elastic positioning column 3 has an automatic rebound and reset function, which prevents the elastic positioning column 3 from hindering the drawing board 1 from fitting with the blackboard surface.

[0033] The positioning mechanism includes positioning bolts 28 and positioning grooves 29, wherein the positioning bolts 28 are provided in two groups and are respectively threaded through the left and right side walls of the drawing board 1, and the positioning grooves 29 are opened on the side walls of the elastic positioning column 3 and adapted to the positioning bolts 28. By screwing the positioning bolts 28 into the positioning grooves 29, the elastic positioning column 3 is positioned and fixed so that it will not rebound and reset.

[0034] The lateral adjustment mechanism includes a second knob 30 and a second screw rod 31, wherein the second screw rod 31 is rotatably connected to the inside of the through slot 6 through a bearing, and the bottom end of the second knob 30 is fixed with a rotating shaft 32 by a bolt, and the bottom end of the rotating shaft 32 passes through the inside of the drawing board 1 through a bearing and is fixed with a first bevel gear 33. A second bevel gear 34 is fixed to the end of the second screw rod 31 close to the first bevel gear 33, and the second bevel gear 34 is meshed with the first bevel gear 33. By rotating the second knob 30, the rotating shaft 32 drives the first bevel gear 33 to rotate, and the first bevel gear 33 drives the second bevel gear 34 meshed with it to rotate, and the second bevel gear 34 drives the second screw rod 31 to rotate, thereby causing the movable column 7 threaded on the second screw rod 31 to be displaced laterally.

[0035] The elastic clamping mechanism includes a circular groove 35 and a second limiting spring 36, wherein the circular groove 35 is opened at the bottom end of the movable column 7, the second limiting spring 36 is fixed to the top inside the circular groove 35, and a clamping sleeve 37 is fixed to the bottom end of the second limiting spring 36, and the clamping sleeve 37 is slidably connected to the inside of the circular groove 35. An elastic rubber sleeve 38 is fixed to the inner wall of the clamping sleeve 37, and the upper part of the drawing chalk 8 is interference fit in the elastic rubber sleeve 38. By interference fitting the drawing chalk 8 into the inner side of the elastic rubber sleeve 38, the drawing chalk 8 is clamped. At the same time, the second limiting spring 36 provides an elastic ejection force for the clamping sleeve 37 and the drawing chalk 8, so that the drawing chalk 8 can contact the surface of the blackboard when the drawing board 1 is attached to the blackboard, so that the drawing chalk 8 can draw a circle on the surface of the blackboard when the drawing board 1 rotates.

[0036] Two groups of storage slots 39 are symmetrically distributed on the front side of the drawing board 1. Chalk storage boxes 40 for storing drawing chalks are slidably connected inside the storage slots 39. The left and right sides of the front side wall of the drawing board 1 are rotatably connected to rotating blocks 41 through bearings. A third limit spring 42 is fixed to the side of the rear side wall of the rotating block 41 close to the chalk storage box 40. The end of the third limit spring 42 away from the rotating block 41 is fixedly connected to the limit block 43. The third limit spring 42 provides an elastic ejection force for the limit block 43, thereby limiting and blocking the chalk storage box 40 to prevent the chalk storage box 40 from falling out. A non-slip rubber pad 44 is fixed to the bottom surface of the drawing board 1, which plays an anti-slip role between the drawing board 1 and the blackboard. A spirit level 45 is embedded and fixed on the top of the drawing board 1 to facilitate control of the levelness of the drawing board 1.

[0037] When the teacher needs to draw a straight line pattern during mathematics teaching, the teacher first places the bottom surface of the drawing board 1 on the blackboard surface and makes the drawing board 1 in a horizontal state. Then, the teacher grabs the chalk with the other hand and draws a line along the side wall of the drawing board 1 near the second scale line 11, that is, draws a standard horizontal straight line. Then, the teacher places the drawing board 1 on the blackboard surface and makes the drawing board 1 in a vertical state. Then, the teacher grabs the chalk with the other hand and draws a line along the side wall of the drawing board 1 near the second scale line 11, that is, draws a standard vertical straight line.

[0038] When the teacher needs to draw a circular pattern during mathematics teaching, he first clamps the drawing chalk 8 to the bottom end of the movable column 7, and then presses the right elastic positioning column 3 downward until the right non-slip rubber cone 4 extends to the bottom of the drawing board 1, and uses the positioning mechanism to clamp and fix the elastic positioning column 3, and then uses the transverse adjustment mechanism to drive the movable column 7 to move laterally along the through slot 6, and drives the drawing chalk 8 clamped at the bottom end of the movable column 7 to move to an appropriate position according to the diameter of the circle to be drawn (the distance between the drawing chalk 8 and the right elastic positioning column 3 is the radius of the circle to be drawn), and then the teacher puts the bottom surface of the drawing board 1 into contact with the blackboard surface, and presses the arc-shaped pressing plate 5 to make the right non-slip rubber cone 4 contact with the blackboard surface, and then rotates the drawing board 1 with the right non-slip rubber cone 4 as the center of the circle, and the drawing chalk 8 can be used to draw a standard circle;

[0039] When a teacher needs to draw a geometric angle during mathematics teaching, the teacher first fits the bottom surface of the drawing board 1 to the surface of the blackboard and makes the drawing board 1 in a horizontal state. Then, the teacher uses the rotation adjustment mechanism to drive the support shaft 13 inside the groove 12 to rotate the angle scale 15 to the outside of the groove 12, so that an angle is formed between the angle scale 15 and the rear side wall of the drawing board 1 (the angle value is measured using the laterally adjustable protractor 16). Then, the teacher grabs the chalk and slides it along the angle scale 15 and the rear side wall of the drawing board 1 on the blackboard to draw a standard geometric angle.

[0040] The basic principles, main features, and advantages of the present invention are shown and described above. Those skilled in the art should understand that the present invention is not limited to the foregoing embodiments. The foregoing embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and modifications are intended to fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. A multi-purpose drawing device for mathematics teaching, comprising a drawing board (1), characterized in that: The drawing board (1) has cavities (2) on both sides thereof, and elastic positioning columns (3) are provided on both sides thereof, which slide through the cavities (2) and are fixed by a positioning mechanism. The bottom end of the elastic positioning column (3) is rotatably connected with an anti-slip rubber cone (4), and the top end of the elastic positioning column (3) is fixed with an arc-shaped pressing plate (5). A through groove (6) corresponding to the position of the cavity (2) is provided in the middle of the drawing board (1), and a moving column (7) driven to move by a transverse adjustment mechanism is slidably provided inside the through groove (6), and a drawing chalk (8) is fixed to the bottom end of the moving column (7) by an elastic clamping mechanism. The moving column (7) is provided with a drawing chalk (8) on its bottom end. (7) A diamond pointer (9) is fixed at the top, a first scale line (10) is printed on the top of the drawing board (1) and is located on both sides of the front and rear of the diamond pointer (9), a second scale line (11) is printed on the front side of the top of the drawing board (1), a groove (12) is symmetrically opened on the back side of the drawing board (1), a support shaft (13) driven to rotate by a rotation adjustment mechanism is rotatably connected inside the groove (12), a connecting plate (14) is sleeved on the support shaft (13), an angle scale (15) is fixed on the end of the connecting plate (14) away from the support shaft (13), and a protractor (16) is slidably connected to the back side of the top of the drawing board (1).

2. A multi-purpose drawing device for mathematics teaching according to claim 1, characterized in that: A connecting block (17) is symmetrically fixed to the front side wall of the protractor (16), a T-shaped slider (18) is fixed to the bottom end of the connecting block (17), and a T-shaped slide rail (19) adapted to the T-shaped slider (18) is provided at the top end of the drawing board (1).

3. A multi-purpose drawing device for mathematics teaching according to claim 1, characterized in that: The rotary adjustment mechanism comprises a driving chamber (20) provided at the front side of the groove (12) and a first screw rod (21) rotatably connected to the driving chamber (20); a threaded block (22) is threadedly sleeved on the first screw rod (21); a rack (23) is fixed to one end of the threaded block (22) close to the support shaft (13); a rotating gear (24) meshing with the rack (23) is sleeved on the support shaft (13); opposite ends of the two sets of the first screw rods (21) are both passed through bearings to the outside of the drawing board (1) and are fixed with a first knob (25).

4. A multi-purpose drawing device for mathematics teaching according to claim 1, characterized in that: A baffle (26) is sleeved on the elastic positioning column (3), a first limit spring (27) sleeved on the outside of the elastic positioning column (3) is fixed to the top of the baffle (26), and the top of the first limit spring (27) is fixed to the top of the cavity (2).

5. A multi-purpose drawing device for mathematics teaching according to claim 1, characterized in that: The positioning mechanism comprises positioning bolts (28) with threads penetrating through both sides of the drawing board (1) and positioning grooves (29) provided on the side walls of the elastic positioning columns (3), wherein the positioning grooves (29) are adapted to the positioning bolts (28).

6. A multi-purpose drawing device for mathematics teaching according to claim 1, characterized in that: The transverse adjustment mechanism comprises a second knob (30) and a second screw rod (31) rotatably connected to the inside of the through slot (6); a rotating shaft (32) is fixed to the bottom end of the second knob (30); the bottom end of the rotating shaft (32) passes through the inside of the drawing board (1) through a bearing and is fixed with a first bevel gear (33); and a second bevel gear (34) meshing with the first bevel gear (33) is fixed to one end of the second screw rod (31) close to the first bevel gear (33).

7. A multi-purpose drawing device for mathematics teaching according to claim 1, characterized in that: The elastic clamping mechanism comprises a circular groove (35) formed at the bottom end of the movable column (7) and a second limit spring (36) fixed to the top end of the circular groove (35); a clamping sleeve (37) slidably connected to the inside of the circular groove (35) is fixed to the bottom end of the second limit spring (36); an elastic rubber sleeve (38) is fixed to the inner wall of the clamping sleeve (37); and the upper part of the drawing chalk (8) is interference fit in the elastic rubber sleeve (38).

8. A multi-purpose drawing device for mathematics teaching according to claim 1, characterized in that: The front side of the drawing board (1) is symmetrically provided with a storage groove (39), a chalk storage box (40) is slidably connected inside the storage groove (39), the front side of the drawing board (1) is rotatably connected with a rotating block (41) symmetrically distributed on the left and right, the side of the rotating block (41) close to the chalk storage box (40) is connected to the limiting block (43) through a third limiting spring (42), the bottom surface of the drawing board (1) is fixed with an anti-slip rubber pad (44), and the top of the drawing board (1) is embedded and fixed with a level (45).

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