Convenient drawing device for mathematics teaching and using method thereof

Abstract

The invention relates to the technical field of drawing devices, and discloses a convenient drawing device for mathematics teaching and a using method thereof.The convenient drawing device comprises a chassis which is of a circular transparent structure, angle scale marks are carved on the surface of the chassis, the convenient drawing device further comprises a supporting column which is fixedly installed in the middle of the top of the chassis, and the bottom of the supporting column is of an open structure; a positioning shaft is installed in the supporting column in a sliding mode. A paintbrush is rapidly clamped and fixed by arranging the positioning assembly, then the servo motor in the equipment box is started through the control switch on the handle, the reciprocating lead screw is firstly driven to enable the positioning shaft to extend out of the bottom of the base plate to position the circle center, and the servo motor continues to be controlled to rotate reversely to drive the supporting arm to rotate to drive the paintbrush to draw; the positioning shaft can abut against the circle center through the handle in the whole process to avoid deviation, and the drawing process is more stable and higher in efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of drawing devices, and in particular to a convenient drawing device for mathematics teaching and a use method thereof. Background Art

[0002] Mathematics is a subject that studies concepts such as quantity, structure, change, space and information. In mathematics teaching, because it involves various function graphs and geometric figures, drawing tools have become an indispensable teaching tool for mathematics teachers. Drawing tools such as rulers, triangles, compasses and protractors are usually used.

[0003] In the prior art, the auxiliary device for drawing circles in mathematics teaching often adopts a compass structure. A pen is clamped and fixed at the drawing end, and then a compass drawing method is used to draw on a display board. During the operation, the auxiliary device is large in size, the positioning end is easy to move, and the stability is insufficient, resulting in low drawing efficiency. Summary of the invention

[0004] The purpose of the present invention is to solve the shortcomings of the prior art and to propose a convenient drawing device for mathematics teaching and a method of using the same.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A convenient drawing device for mathematics teaching, comprising a chassis, wherein the chassis is a circular transparent structure and has angle scale lines engraved on the surface, and further comprising:

[0007] A support column, the support column is fixedly installed in the middle of the top of the chassis, the bottom of the support column is an open structure, a positioning shaft is slidably installed in the support column, a reciprocating screw rod is rotatably installed in the center of the top of the support column, and the positioning shaft is threadedly sleeved on the surface of the reciprocating screw rod;

[0008] A support arm, the support arm is rotatably sleeved on the support pillar surface, a circular groove is provided at one end of the top of the support arm, and a first sliding groove penetrating through the outer surface of the support arm is provided at the other side of the top of the support arm;

[0009] An extension component, which is arranged at one end of the support arm away from the support pillar and is used to extend the coverage of the drawing;

[0010] A positioning component is slidably installed in the first sliding groove, and is used to clamp and fix the paintbrush and can adjust the distance from the paintbrush to the center of the circle.

[0011] As a further solution of the present invention, a partition is fixedly installed on the top of the pillar, an internal gear ring is fixedly embedded in the circular groove, a spur gear meshing with the internal gear ring is rotatably installed on one side of the bottom of the partition, a driven gear is rotatably installed on the center of the top of the partition, and a driving gear meshing with the driven gear is rotatably installed on one side of the top of the partition. The interior of the driving gear is a hollow structure, and a one-way bearing is fixedly installed in the driving gear. The top center of the spur gear is fixed to the inner ring of the one-way bearing through a connecting shaft, and the top of the reciprocating screw passes through the pillar and the partition and is fixed to the bottom rotation center of the driven gear.

[0012] As a further solution of the present invention, a device box is fixedly installed on the top of the partition, and the device box is a cylindrical structure with open ends. A servo motor and a battery are fixedly installed on one side of the device box. The output end of the servo motor is fixedly installed on the top of the connecting shaft through a coupling. A box cover is threadedly sleeved on the top of the device box, and a handle is fixedly installed on the top of the box cover.

[0013] As a further solution of the present invention, the handle has a hollow structure inside, a control switch with a sliding structure is provided on the top of the handle, a microcontroller is provided in the device box, the microcontroller controls the start and stop and forward and reverse rotation of the servo motor, and the battery supplies power to the microcontroller and the servo motor.

[0014] As a further solution of the present invention, the extension component includes a stop block, on which a first extension shaft and a second extension shaft are symmetrically fixedly installed on one side of the stop block close to the support arm, a second scale line is engraved on the surface of the first extension shaft, and a magnet sheet is fixedly embedded on one side of the stop block close to the support arm, and two spring pins are symmetrically installed on one end of the first extension shaft and the second extension shaft close to the stop block, and a first scale line is engraved on one side of the top of the support arm.

[0015] As a further solution of the present invention, the support arm is provided with two slide slot holes compatible with the first extension shaft and the second extension shaft at one end close to the stop block, the first extension shaft and the second extension shaft are slidably installed in the two slide slot holes, the adjacent sides of the two slide slot holes are open, a first fastening bolt is threadedly connected to one side of the support arm, one end of the first fastening bolt abuts against the surface of the second extension shaft to limit it, two storage cavities are symmetrically provided at the bottom of the support arm, a spring leg is hingedly connected to the end of the opening of each storage cavity away from the chassis through a torsion spring, and a cover plate is removably embedded at the other end of the opening of each storage cavity, and two foot pads flush with the chassis are fixedly installed at the bottom of the stop block.

[0016] As a further solution of the present invention, the positioning assembly includes a moving box, two protrusions are symmetrically provided on two opposite sides of the moving box, the two protrusions pass through the support arms and respectively abut against the surfaces of the first extension shaft and the second extension shaft, the interiors of the two protrusions are hollow structures and the surfaces are provided with round holes that are compatible with the spring pins, sliders are slidably installed in the two protrusions, two clamping blocks are symmetrically slidably installed in the moving box, a bidirectional screw is rotatably installed in the moving box, a guide shaft is fixedly installed in the moving box, the two clamping blocks are slidably sleeved on the surface of the guide shaft, and the two clamping blocks are threadedly sleeved on the bidirectional The surface of the screw rod is symmetrically threaded with two second fastening bolts in the moving box, and the bottom end of the moving box is provided with through holes compatible with the two second fastening bolts. The bottom ends of the two second fastening bolts pass through the through holes and are tightened against the surface of the support arm to limit the moving box. The two second fastening bolts are both semi-threaded structures and are fixedly sleeved with shaft sleeves on the surface. Each of the sliders is provided with an avoidance groove and an inclined structure on the side close to the second fastening bolt, and each of the sliders is pressed against the second fastening bolt through one side of its inclined surface. A cylindrical convex rafter is provided on the other side of each slider, and a return spring is sleeved on the surface of each convex rafter.

[0017] As a further solution of the present invention, a worm is rotatably installed on one side of the moving box, a worm wheel meshing with the worm is fixedly sleeved on the surface of one end of the bidirectional lead screw, a transmission shaft is fixedly installed on the top of the worm, a top cover is fixedly installed on the top of the moving box, a pointer is fixedly installed on one side of the top of the top cover, and a convex shaft is fixedly installed on the other side of the top of the top cover, a threaded hole is provided on the top of the convex shaft and passes through its outer surface, an adjusting stud is threadedly connected in the threaded hole, a limiting hole is provided at the bottom end of the adjusting stud, and the transmission shaft is slidably installed in the limiting hole, the adjusting stud, two second fastening bolts and one end of the first fastening bolt are all fixedly installed with anti-slip knobs, a mounting hole for the entry and exit of a paintbrush is provided at the center of the top of the top cover, and concave slots for clamping the paintbrush are provided on adjacent sides of the two clamping blocks.

[0018] A method for using a convenient drawing device for mathematics teaching comprises the following steps:

[0019] Step 1: First, install the paintbrush inside the positioning assembly, rotate the knob on the top of the adjustment stud to drive the worm to rotate, and then adjust the distance between the two clamps. Place the paintbrush on the two clamps to adjust the height, and then turn the knob on the top of the adjustment stud to clamp and fix the paintbrush.

[0020] Step 2: Then, according to the requirements of the drawing parameters, drag the moving box so that the pointer on the top of it points to the corresponding scale number, which represents the radius, and then turn the knob on the top of the second fastening bolt so that the second fastening bolt rotates and presses against the support arm, thereby limiting the moving box;

[0021] Step 3: Then hold the handle, control the servo motor to start through the control switch on the handle, and drive the driving gear to rotate through the one-way bearing, and the driving gear drives the driven gear to rotate, and then drives the reciprocating screw to rotate. The reciprocating screw drives the positioning shaft to extend from the bottom of the chassis through the thread drive, which is used for center positioning. At the same time, the support arm rotates to the initial position;

[0022] Step 4: Finally, push the control switch to drive the servo motor to reverse, thereby driving the arm to rotate around the positioning axis from the initial position, which can drive the brush in the positioning component to draw;

[0023] Step 5: When the drawing radius is greater than the length of the arm, rotate the second fastening bolt to raise it, release the limit on the mobile box, and the protrusion slides into the inside of the mobile box under the action of the reset spring, and then push the mobile box to one side of the block and adsorb the mobile box through the magnet sheet. At the same time, the spring pins on the surfaces of the first extension shaft and the second extension shaft are respectively embedded in the protrusions on both sides of the mobile box, so that the mobile box and the block are adjusted as a whole, loosen the first fastening bolt, drag the mobile box until the brush is at the desired radius position, and then tighten and loosen the first fastening bolt, and then you can draw as in step 4.

[0024] Compared with the prior art, the present invention has the following beneficial effects:

[0025] 1. The brush can be quickly clamped and fixed by setting the positioning component, and then the positioning component is adjusted to the appropriate position according to the drawing requirements, and then the servo motor in the equipment box is started through the control switch on the handle. First, the servo motor is started to drive the one-way bearing to rotate, and then the driving gear is driven to rotate, and the driving gear drives the driven gear to rotate, and the driven gear drives the reciprocating screw to rotate. The reciprocating screw drives the positioning shaft from the bottom of the chassis through the thread drive to locate the center of the circle, and then the servo motor is controlled to reverse, and then the spur gear is driven to rotate, and the spur gear is meshed with the inner gear ring to drive the support arm to rotate. The corresponding angle can be rotated arbitrarily according to the drawing requirements, and the drawing process only needs to hold the handle so that the positioning shaft is against the center of the circle, which improves the stability of the positioning shaft and the work efficiency of drawing;

[0026] 2. By setting the positioning component, it can be used to clamp pens of various diameters. During the clamping process, you only need to turn the anti-slip knob on the top of the adjusting stud to drive the worm to rotate, the worm drives the worm wheel to rotate, and the worm wheel drives the bidirectional lead screw to rotate. Through the threaded drive of the bidirectional lead screw, the two clamping blocks can move synchronously, so that the clamped pen can be fixed in the center position of the mobile box, which is convenient for more accurate positioning of the distance from the brush to the center of the circle, while improving the scope of application of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1This is a schematic diagram of the structure of a convenient drawing device for mathematics teaching proposed by the present invention;

[0028] Figure 2 This is a schematic cross-sectional view of a convenient drawing device for mathematics teaching proposed by the present invention;

[0029] Figure 3 This is a schematic diagram of the upward structural view of the support arm of a convenient drawing device for mathematics teaching proposed by the present invention;

[0030] Figure 4 This is a schematic diagram of the exploded structure of a convenient drawing device for mathematics teaching proposed by the present invention;

[0031] Figure 5 for Figure 4 A schematic diagram of the enlarged structure of part A;

[0032] Figure 6 for Figure 4 A schematic diagram of the enlarged structure of part B;

[0033] Figure 7 for Figure 4 A schematic diagram of the enlarged structure of the middle C part;

[0034] Figure 8 This is a schematic diagram of the exploded structure of a positioning component of a convenient drawing device for mathematics teaching proposed by the present invention;

[0035] Fig. 9 A schematic diagram of the connection structure between a worm and an adjusting stud of a convenient drawing device for mathematics teaching proposed by the present invention;

[0036] Fig.10 The present invention is a schematic cross-sectional structural diagram of a positioning component of a convenient drawing device for mathematics teaching proposed by the present invention.

[0037] In the figure: 1, chassis; 2, support arm; 3, extension assembly; 301, stopper; 302, magnet sheet; 303, first extension shaft; 304, second scale line; 305, second extension shaft; 306, spring pin; 4, positioning assembly; 401, moving box; 402, convex block; 403, clamping block; 404, two-way screw rod; 405, guide shaft; 406, slider; 407, return spring; 408, second fastening bolt; 409, anti-slip knob; 410, top cover; 412, pointer; 413, adjustment stud; 414, convex shaft; 415. Worm gear; 416. Worm; 417. Bushing; 418. Drive shaft; 5. First scale mark; 6. Equipment box; 7. Box cover; 8. Handle; 9. Control switch; 10. First slide slot; 11. Pillar; 12. Positioning shaft; 13. Reciprocating screw; 14. Internal gear ring; 15. Spur gear; 16. Driven gear; 17. Driving gear; 18. Servo motor; 19. Storage chamber; 20. Cover plate; 21. Spring leg; 22. First fastening bolt; 23. Foot pad; 24. Partition; 25. Battery; 26. One-way bearing. DETAILED DESCRIPTION

[0038] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0039] In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front end", "rear end", "two ends", "one end", "the other end" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply 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 limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0040] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0041] Reference Figure 1-Figure 10A convenient drawing device for mathematics teaching includes a chassis 1, which is a circular transparent structure with angle scale lines engraved on the surface, and a pillar 11, which is fixedly installed in the middle of the top of the chassis 1, and the bottom of the pillar 11 is an open structure. A positioning shaft 12 is slidably installed in the pillar 11, and a reciprocating screw rod 13 is rotatably installed in the top center of the pillar 11. The positioning shaft 12 is threadedly sleeved on the surface of the reciprocating screw rod 13, a support arm 2, and the support arm 2 is rotatably sleeved on the surface of the support arm 11. A circular groove is opened at one end of the top of the support arm 2, and a first slide groove 10 penetrating its outer surface is opened on the other side of the top of the support arm 2, an extension component 3, and the extension component 3 is arranged at the end of the support arm 2 away from the pillar 11, which is used to extend the coverage of the drawing, a positioning component 4, and a positioning The component 4 is slidably installed in the first slide groove 10. The positioning component 4 is used to clamp and fix the paintbrush and can adjust the distance from the paintbrush to the center of the circle. A partition 24 is fixedly installed on the top of the pillar 11. An internal gear ring 14 is fixedly embedded in the circular groove. A spur gear 15 meshing with the internal gear ring 14 is rotatably installed on one side of the bottom of the partition 24. A driven gear 16 is rotatably installed on the top center of the partition 24. A driving gear 17 meshing with the driven gear 16 is rotatably installed on one side of the top of the partition 24. The driving gear 17 has a hollow structure inside, and a one-way bearing 26 is fixedly installed in the driving gear 17. The top center of the spur gear 15 is fixed to the inner ring of the one-way bearing 26 through a connecting shaft. The top of the reciprocating screw 13 passes through the pillar 11 and the partition 24 and rotates with the bottom center of the driven gear 16. The device box 6 is fixedly installed on the top of the partition 24. The device box 6 is a cylindrical structure with open ends. A servo motor 18 and a battery 25 are fixedly installed on one side of the device box 6. The output end of the servo motor 18 is fixedly installed with the top of the connecting shaft through a coupling. A box cover 7 is threadedly sleeved on the top of the device box 6. A handle 8 is fixedly installed on the top of the box cover 7. The handle 8 is hollow inside. A control switch 9 with a sliding structure is provided on the top of the handle 8. A microcontroller is provided in the device box 6. The microcontroller controls the start and stop and forward and reverse rotation of the servo motor 18. The battery 25 supplies power to the microcontroller and the servo motor 18. The present invention quickly clamps and fixes the paintbrush by setting a positioning component 4, and then adjusts the positioning component 4 to an appropriate position according to the drawing requirements, and then Then, the servo motor 18 in the equipment box 6 is started through the control switch 9 on the handle 8. First, the servo motor 18 is started to drive the one-way bearing 26 to rotate, and then the driving gear 17 is driven to rotate, and the driving gear 17 drives the driven gear 16 to rotate, and the driven gear 16 drives the reciprocating screw 13 to rotate. The reciprocating screw 13 extends the positioning shaft 12 from the bottom of the chassis 1 through the thread drive to locate the center of the circle, and then the servo motor 18 is controlled to reverse, and then the spur gear 15 is driven to rotate, and the spur gear 15 is meshed with the inner gear ring 14 to drive the support arm 2 to rotate. The corresponding angle can be rotated arbitrarily according to the drawing needs, and the drawing process only needs to hold the handle 8 so that the positioning shaft 12 is against the center of the circle, which improves the stability of the positioning shaft 12 and the drawing work efficiency;

[0042] The support 11 is a shoulder column structure, and the shoulder end is at the bottom to improve the stability of the support 11. Two second slide grooves are provided on the surface of the positioning shaft 12, and the second slide grooves do not penetrate the top of the positioning shaft 12. The opening at the bottom of the support 11 is provided as a limited opening adapted to the outer surface of the positioning shaft 12. Therefore, the positioning shaft 12 is slidably connected to the support 11. At the same time, the positioning shaft 12 slides to a limited position toward the bottom of the support 11 and will not completely slide out of the support 11. During assembly, the positioning shaft 12 first penetrates into the interior of the support 11 from the top, and then the reciprocating screw 13 with a bearing sleeve is installed on the support The opening at the top of the column 11 can also be provided with a pawl in the device box 6 for limiting the driven gear 16, thereby improving the stability of the positioning shaft 12 during use. A microcontroller (not shown in the figure) is provided in the device box 6 and combined with a sliding control switch 9, which can control the servo motor 18 in three gears. The first gear is to turn off the servo motor 18; the second gear is the forward rotation of the servo motor 18, at which time the driving gear 17 can be driven to rotate through the one-way bearing 26, thereby controlling the extension and retraction of the positioning shaft 12; the third gear controls the reverse rotation of the servo motor 18, thereby driving the support arm 2 to rotate, and driving the drawing pen for drawing.

[0043] In this embodiment, the extension component 3 includes a stopper 301, and the first extension shaft 303 and the second extension shaft 305 are symmetrically fixedly installed on the side of the stopper 301 close to the support arm 2. The surface of the first extension shaft 303 is engraved with a second scale line 304. A magnet sheet 302 is fixedly embedded on the side of the stopper 301 close to the support arm 2. Two spring pins 306 are symmetrically installed on the first extension shaft 303 and the second extension shaft 305 close to the end of the stopper 301. A first scale line 5 is engraved on one side of the top of the support arm 2. Two spring pins 306 that are compatible with the first extension shaft 303 and the second extension shaft 305 are opened on the end of the support arm 2 close to the stopper 301. A slide slot hole, a first extension shaft 303 and a second extension shaft 305 are slidably installed in the two slide slot holes, the adjacent sides of the two slide slot holes are open, a first fastening bolt 22 is threadedly connected to one side of the support arm 2, one end of the first fastening bolt 22 abuts against the surface of the second extension shaft 305 to limit it, and two storage cavities 19 are symmetrically provided at the bottom of the support arm 2, and a spring leg 21 is hingedly connected to the end of each storage cavity 19 away from the chassis 1 through a torsion spring, and a cover plate 20 is removably embedded at the other end of the open end of each storage cavity 19, and two foot pads 23 flush with the chassis 1 are fixedly installed at the bottom of the stopper 301.

[0044] During use, when the required drawing radius exceeds the length of the support arm 2, loosen the first fastening bolt 22, and then loosen the two second fastening bolts 408. At this time, the mobile box 401 can slide arbitrarily in the first sliding groove 10 opened in the support arm 2, and then push the mobile box 401 to close to the stopper 301. Under the dual limiting action of the magnet sheet 302 and the spring pin 306, the mobile box 401 and the stopper 301 are a whole. Continue to adjust the position of the mobile box 401. Combined with the scale line 304 on the surface of the first extension shaft 303, the brush carried by the positioning component 4 can be adjusted to a distance that meets the drawing requirements, thereby improving the scope of application of the equipment and better meeting the needs of drawing. Through the flexible use of the extension component 3 and the telescopic design of the positioning shaft 12, the entire device can be retracted into a smaller volume when not in use, thereby improving the convenience of carrying the equipment. The foot pad 23 is arranged flush with the chassis 1, and the transparent chassis allows the device to be used as a ruler, thereby improving the convenience and versatility of the equipment.

[0045] In this embodiment, the positioning assembly 4 includes a moving box 401, and two protrusions 402 are symmetrically provided on two opposite sides of the moving box 401. The two protrusions 402 pass through the support arm 2 and respectively abut against the surfaces of the first extension shaft 303 and the second extension shaft 305. The interiors of the two protrusions 402 are hollow structures and the surfaces are provided with round holes adapted to the spring pins 306. Slide blocks 406 are slidably installed in the two protrusions 402. Two clamping blocks 403 are symmetrically slidably installed in the moving box 401. A bidirectional screw rod 404 is rotatably installed in the moving box 401. A fixed installation is installed in the moving box 401. There is a guide shaft 405, two clamping blocks 403 are slidably sleeved on the surface of the guide shaft 405, and the two clamping blocks 403 are threadedly sleeved on the surface of the bidirectional screw rod 404. The mobile box 401 is symmetrically threaded with two second fastening bolts 408. The bottom end of the mobile box 401 is provided with through holes adapted to the two second fastening bolts 408. The bottom ends of the two second fastening bolts 408 pass through the through holes and are tightly pressed against the surface of the support arm 2 to limit the mobile box 401. The two second fastening bolts 408 are semi-threaded structures and the surfaces are fixedly sleeved with shaft sleeves 417. Each slider 406 is close to the second fastening bolts One side of the fixing bolt 408 is provided with an avoidance groove and an inclined structure, each slider 406 is against the second fixing bolt 408 through one side of its inclined surface, and the other side of each slider 406 is provided with a cylindrical convex rafter, and the surface of each convex rafter is sleeved with a return spring 407, a worm 416 is rotatably installed on one side of the moving box 401, a worm wheel 415 meshing with the worm 416 is fixedly sleeved on one end surface of the bidirectional lead screw 404, a transmission shaft 418 is fixedly installed on the top of the worm 416, a top cover 410 is fixedly installed on the top of the moving box 401, and a finger is fixedly installed on one side of the top of the top cover 410 Needle 412, a convex shaft 414 is fixedly installed on the other side of the top of the top cover 410, a threaded hole is opened on the top of the convex shaft 414 and passes through its outer surface, an adjusting stud 413 is threadedly connected to the threaded hole, a limiting hole is opened at the bottom of the adjusting stud 413, a transmission shaft 418 is slidably installed in the limiting hole, the adjusting stud 413, the two second fastening bolts 408 and one end of the first fastening bolt 22 are fixedly installed with an anti-slip knob 409, a mounting hole for the brush to enter and exit is opened at the center of the top of the top cover 410, and a concave slot for clamping the brush is clamped on the adjacent sides of the two clamping blocks 403.

[0046] When in use, the positioning assembly 4 can be used to clamp pens of various diameters. During the clamping process, it is only necessary to rotate the anti-slip knob 409 at the top of the adjusting stud 413 to drive the worm 416 to rotate, the worm 416 drives the worm wheel 415 to rotate, and the worm wheel 415 drives the bidirectional screw 404 to rotate. Through the thread drive of the bidirectional screw 404, the two clamping blocks 403 can move synchronously, so that the clamped pen can be fixed at the center position of the mobile box 401, which is convenient for more accurate positioning of the distance from the brush to the center of the circle, and at the same time improves the applicability of the device. Range: The second fastening bolt 408 is provided not only for limiting the position of the mobile box 401 after adjustment in the first slide groove 10, but also when the extension component 3 is stored, the second fastening bolt 408 is rotated to drive the shaft sleeve 417 to move downward, and the shaft sleeve 417 is abutted against the inclined surface of the slider 406, so that it slides in the direction of the spring pin 306 and compresses the reset spring 407 until the spring pin 306 is pushed out from the protrusion 402, thereby separating the mobile box 401 from the extension component 3 and entering the first slide groove 10 opened by the support arm 2, thereby improving the linkage of the equipment.

[0047] A method for using a convenient drawing device for mathematics teaching comprises the following steps:

[0048] S1: First, install the paintbrush inside the positioning assembly 4, and rotate the knob 409 on the top of the adjusting stud 413 to drive the worm 416 to rotate, thereby adjusting the distance between the two clamping blocks 403, and place the paintbrush on the two clamping blocks 403 to adjust the height, and then rotate the knob 409 on the top of the adjusting stud 413 to clamp and fix the paintbrush;

[0049] S2: Then, according to the requirements of the drawing parameters, the moving box 401 is dragged so that the pointer 412 on the top thereof points to the corresponding scale number, which represents the radius, and then the knob 409 on the top of the second fastening bolt 408 is turned so that the second fastening bolt 408 rotates and presses against the support arm 2, thereby limiting the moving box 401;

[0050] S3: Then hold the handle 8, control the servo motor 18 to start through the control switch 9 on the handle 8, and drive the driving gear 17 to rotate through the one-way bearing 26, and the driving gear 17 drives the driven gear 16 to rotate, and then drives the reciprocating screw 13 to rotate, and the reciprocating screw 13 drives the positioning shaft 12 to extend from the bottom of the chassis 1 through the thread drive, which is used for center positioning, and at the same time the support arm 2 rotates to the initial position;

[0051] S4: Finally, the control switch 9 is pushed to drive the servo motor 18 to reverse, thereby driving the arm 2 to rotate around the positioning axis 12 from the initial position, and driving the brush in the positioning component 4 to draw;

[0052] S5: When the drawing radius is greater than the length of the arm 2, rotate the second fastening bolt 408 to raise it, release the limit on the moving box 401, and the protrusion 402 slides into the moving box 401 under the action of the return spring 407, and then push the moving box 401 to the side of the stopper 301 and adsorb the moving box 401 through the magnet sheet 302, and at the same time, the spring pins 306 on the surfaces of the first extension shaft 303 and the second extension shaft 305 are respectively embedded in the protrusions 402 on both sides of the moving box 401, so that the moving box 401 and the stopper 301 are adjusted as a whole, loosen the first fastening bolt 22, drag the moving box 401 until the brush is at the desired radius position, and then tighten and loosen the first fastening bolt 22, and then you can draw as in S4.

[0053] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A convenient drawing device for mathematics teaching, comprising a chassis (1), wherein the chassis (1) is a circular transparent structure and has angle scale lines engraved on the surface, characterized in that: Also includes: A support column (11), the support column (11) is fixedly mounted in the middle of the top of the chassis (1), the bottom of the support column (11) is an open structure, a positioning shaft (12) is slidably mounted in the support column (11), a reciprocating screw rod (13) is rotatably mounted in the center of the top of the support column (11), and the positioning shaft (12) is threadedly sleeved on the surface of the reciprocating screw rod (13); A support arm (2), the support arm (2) being rotatably sleeved on the surface of the support pillar (11), a circular groove being provided at one end of the top of the support arm (2), and a first slide groove (10) penetrating the outer surface of the support arm (2) being provided at the other side of the top of the support arm (2); An extension component (3), the extension component (3) being arranged at an end of the support arm (2) away from the support pillar (11) and being used to extend the coverage of the drawing; A positioning component (4) is slidably mounted in the first slide groove (10), and the positioning component (4) is used to clamp and fix the paintbrush and can adjust the distance between the paintbrush and the center of the circle.

2. A convenient drawing device for mathematics teaching according to claim 1, characterized in that: A partition (24) is fixedly installed on the top of the pillar (11), an internal gear ring (14) is fixedly embedded in the circular groove, a spur gear (15) meshing with the internal gear ring (14) is rotatably installed on one side of the bottom of the partition (24), a driven gear (16) is rotatably installed on the top center of the partition (24), a driving gear (17) meshing with the driven gear (16) is rotatably installed on one side of the top of the partition (24), the driving gear (17) is hollow inside, a one-way bearing (26) is fixedly installed inside the driving gear (17), the top center of the spur gear (15) is fixed to the inner ring of the one-way bearing (26) through a connecting shaft, and the top of the reciprocating screw rod (13) passes through the pillar (11) and the partition (24) and is fixedly installed on the bottom rotation center of the driven gear (16).

3. A convenient drawing device for mathematics teaching according to claim 2, characterized in that: A device box (6) is fixedly mounted on the top of the partition (24); the device box (6) is a cylindrical structure with two ends open; a servo motor (18) and a battery (25) are fixedly mounted on one side of the device box (6); an output end of the servo motor (18) is fixedly mounted on the top of a connecting shaft via a coupling; a box cover (7) is threadedly sleeved on the top of the device box (6); and a handle (8) is fixedly mounted on the top of the box cover (7).

4. A convenient drawing device for mathematics teaching according to claim 3, characterized in that: The handle (8) has a hollow structure inside, and a control switch (9) having a sliding structure is provided on the top of the handle (8). A microcontroller is provided in the device box (6), and the microcontroller controls the start and stop and forward and reverse rotation of the servo motor (18). The storage battery (25) supplies power to the microcontroller and the servo motor (18).

5. A convenient drawing device for mathematics teaching according to claim 4, characterized in that: The extension assembly (3) comprises a stopper (301), a first extension shaft (303) and a second extension shaft (305) are symmetrically fixedly mounted on one side of the stopper (301) close to the support arm (2), a second scale line (304) is engraved on the surface of the first extension shaft (303), a magnet sheet (302) is fixedly embedded on one side of the stopper (301) close to the support arm (2), two spring pins (306) are symmetrically mounted on one end of the first extension shaft (303) and the second extension shaft (305) close to the stopper (301), and a first scale line (5) is engraved on one side of the top of the support arm (2).

6. A convenient drawing device for mathematics teaching according to claim 5, characterized in that: The support arm (2) is provided with two slide slot holes matched with the first extension shaft (303) and the second extension shaft (305) at one end close to the stopper (301); the first extension shaft (303) and the second extension shaft (305) are slidably installed in the two slide slot holes; the adjacent sides of the two slide slot holes are open; a first fastening bolt (22) is threadedly connected to one side of the support arm (2); one end of the first fastening bolt (22) abuts against the surface of the second extension shaft (305) to limit the position thereof; two storage cavities (19) are symmetrically provided at the bottom of the support arm (2); a spring leg (21) is hingedly connected to the open end of each storage cavity (19) away from the chassis (1) through a torsion spring; a cover plate (20) is detachably embedded at the other open end of each storage cavity (19); two foot pads (23) flush with the chassis (1) are fixedly installed at the bottom of the stopper (301).

7. A convenient drawing device for mathematics teaching according to claim 1, characterized in that: The positioning assembly (4) comprises a moving box (401), two protrusions (402) are symmetrically arranged on two opposite sides of the moving box (401), the two protrusions (402) pass through the support arm (2) and respectively abut against the surfaces of the first extension shaft (303) and the second extension shaft (305), the interiors of the two protrusions (402) are hollow structures and the surfaces are provided with round holes that match the spring pins (306), the two protrusions (402) are slidably installed with sliders (406), the moving box (401) has two clamping blocks (403) symmetrically slidably installed, a bidirectional screw rod (404) is rotatably installed in the moving box (401), a guide shaft (405) is fixedly installed in the moving box (401), the two clamping blocks (403) are slidably sleeved on the surface of the guide shaft (405), and the two clamping blocks (403) are threaded. Sleeved on the surface of the bidirectional screw rod (404), the movable box (401) is symmetrically threaded with two second fastening bolts (408), the bottom end of the movable box (401) is provided with through holes compatible with the two second fastening bolts (408), the bottom ends of the two second fastening bolts (408) pass through the through holes and are pressed against the surface of the support arm (2) to limit the movable box (401), the two second fastening bolts (408) are semi-threaded structures and the surfaces are fixedly sleeved with shaft sleeves (417), each of the sliders (406) is provided with an avoidance groove and an inclined surface structure on the side close to the second fastening bolt (408), each of the sliders (406) is pressed against the second fastening bolt (408) through its inclined side, and each of the sliders (406) is provided with a cylindrical convex rafter on the other side, and a return spring (407) is sleeved on the surface of each convex rafter.

8. A convenient drawing device for mathematics teaching according to claim 7, characterized in that: A worm (416) is rotatably mounted on one side of the moving box (401); a worm wheel (415) meshing with the worm (416) is fixedly sleeved on one end surface of the bidirectional lead screw (404); a transmission shaft (418) is fixedly mounted on the top of the worm (416); a top cover (410) is fixedly mounted on the top of the moving box (401); a pointer (412) is fixedly mounted on one side of the top of the top cover (410); a convex shaft (414) is fixedly mounted on the other side of the top of the top cover (410); a through hole is provided on the top of the convex shaft (414). A threaded hole is formed on the outer surface of the top cover (410), wherein an adjusting stud (413) is threadedly connected to the threaded hole, a limiting hole is formed at the bottom end of the adjusting stud (413), and the transmission shaft (418) is slidably installed in the limiting hole. The adjusting stud (413), the two second fastening bolts (408) and one end of the first fastening bolt (22) are all fixedly installed with an anti-slip knob (409). A mounting hole for the entry and exit of a paintbrush is formed at the center of the top of the top cover (410), and a concave slot for clamping a paintbrush is formed on adjacent sides of the two clamping blocks (403).

9. A method for using a convenient drawing device for mathematics teaching, characterized in that: A convenient drawing device for mathematics teaching according to any one of claims 1 to 8 is used, comprising the following steps: S1: First, install the paintbrush inside the positioning assembly (4), rotate the knob (409) at the top of the adjusting stud (413) to drive the worm (416) to rotate, thereby adjusting the distance between the two clamping blocks (403), place the paintbrush between the two clamping blocks (403) to adjust the height, and then rotate the knob (409) at the top of the adjusting stud (413) to clamp and fix the paintbrush; S2: Then, according to the requirements of the drawing parameters, the moving box (401) is dragged so that the pointer (412) on the top thereof points to the corresponding scale number, which represents the radius, and then the knob (409) on the top of the second fastening bolt (408) is turned so that the second fastening bolt (408) rotates and presses against the support arm (2), thereby limiting the position of the moving box (401); S3: Then, the handle (8) is held by hand, and the servo motor (18) is controlled by the control switch (9) on the surface of the handle (8) to start and drive the driving gear (17) to rotate through the one-way bearing (26), and the driving gear (17) drives the driven gear (16) to rotate, thereby driving the reciprocating screw (13) to rotate, and the reciprocating screw (13) drives the positioning shaft (12) to extend from the bottom of the chassis (1) through the thread drive, which is used for center positioning, and at the same time, the support arm (2) rotates to the initial position; S4: Finally, the control switch (9) is pushed to drive the servo motor (18) to reverse, thereby driving the support arm (2) to rotate around the positioning axis (12) from the initial position, and driving the brush in the positioning component (4) to draw; S5: When the drawing radius is greater than the length of the support arm (2), the second fastening bolt (408) is rotated to raise it, the limit on the moving box (401) is released, and the protrusion (402) slides into the inside of the moving box (401) under the action of the return spring (407), and then the moving box (401) is pushed to one side of the stopper (301) and the moving box (401) is adsorbed by the magnet sheet (302), and at the same time, the spring pins (306) on the surfaces of the first extension shaft (303) and the second extension shaft (305) are respectively embedded in the protrusions (402) on both sides of the moving box (401), so that the moving box (401) and the stopper (301) are adjusted as a whole, the first fastening bolt (22) is loosened, and the moving box (401) is dragged until the brush is at the desired radius position, and then the first fastening bolt (22) is locked and loosened, and then the drawing can be carried out as in the operation in S4.

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