Mathematical plotter

Abstract

The utility model relates to the technical field of mathematical drawing, and discloses a mathematical drawing device which comprises a disc, a wafer and a main plate, the wafer is arranged at the circle center position in the middle of the disc, the main plate is connected to the side edge of the wafer, the side edge of the wafer is further connected with two auxiliary plates, and the tail ends of the main plate and the auxiliary plates are slidably arranged in a sliding groove formed in an inner ring of the disc in an abutting mode. A plate groove is formed in the main plate, a movable plate is slidably arranged in the plate groove, a second through hole is formed in the middle of the surface of the movable plate, and a penetrating opening which is communicated with the plate groove and vertically penetrates through the plate groove is formed in the surface of the main plate in the direction of the plate groove. According to the technical scheme, the pen point penetrates through the second penetrating hole in the surface of the position-adjustable moving plate, a circle or an arc with the corresponding radius is drawn, the scale marks arranged on the surface of the disc facilitate direct drawing of the arc with the corresponding angle, and therefore the purpose of drawing an arc with the specified radius and angle is achieved without the help of a ruler and a protractor. And no pinhole is left, so that continuous drawing with the circle center as the starting point is facilitated.

Description

Technical Field

[0001] This utility model relates to the field of mathematical graphing technology, specifically a mathematical graphing device. Background Technology

[0002] Mathematical drawing is the process of visually representing mathematical concepts, relationships, and problems using graphics. It is an important tool for mathematical learning and research. Drawing not only assists in problem-solving but also cultivates logical thinking and spatial imagination. It allows people to deepen their understanding of mathematical principles through hands-on activities and improves the efficiency and accuracy of solving practical problems. In mathematics and drafting, a compass is a tool used to draw circles or chords, commonly used in ruler-and-compass constructions. Compasses are usually made of metal and consist of two parts connected by a hinge, which allows for adjustment. Compasses are classified into ordinary compasses, spring compasses, point compasses, beam compasses, old-fashioned compasses, mechanical pencil compasses, and sliding compasses, etc.

[0003] When drawing an arc with a specified angle and radius using a traditional circular compass, it requires not only a compass but also a ruler and a protractor, necessitating the use of more tools. Furthermore, the drawing leaves pinholes on the paper, making it inconvenient to continue drawing from the center. Therefore, we propose a mathematical plotter. Utility Model Content

[0004] The purpose of this invention is to provide a mathematical plotter that allows a pen tip to pass through a second perforation on the surface of an adjustable movable plate to draw circles or arcs of corresponding radii. The scale lines on the surface of the disc facilitate the direct drawing of arcs of corresponding angles, thus eliminating the need for a ruler and protractor to draw arcs of specified radii and angles. Furthermore, it avoids leaving pinholes, making it easy to continue drawing from the center of the circle, thereby solving the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: A mathematical plotter includes a disk, a disc, and a main board. The disc is placed at the center of the disk, and the main board is connected to the side of the disc. Two secondary boards are also connected to the side of the disc. The ends of the main board and the secondary boards are slidably placed in a groove within the inner ring of the disk. A groove is formed inside the main board, and a movable plate is slidably placed within the groove. A second through hole is formed at the center of the surface of the movable plate. A through hole is formed on the surface of the main board along the direction of the groove, communicating with the groove and penetrating vertically. The main board surface on the side of the opening is evenly provided with linear scale lines, and the surface of the disc is evenly provided with angular scale lines. Side grooves communicating with the main board groove are opened on both sides of the plate groove. Rod grooves are also opened on both sides of the moving plate. A connecting rod is arranged laterally between the rod groove and the side groove. The connecting rod can slide through the opening on the side of the main board and the side groove to the outside. A locking piece is fixed around the outer ring of the connecting rod located in the side groove. A spring is sleeved on the outer ring of the connecting rod between the locking piece and the moving plate. The spring abuts against the locking piece and makes it contact the inner surface of the side groove, and the end of the connecting rod is placed in the rod groove.

[0006] By adopting the above technical solution, the position of the moving plate in the plate groove is adjusted, thereby adjusting the distance between the first and second through holes, and adjusting the radius of the circle or arc. When drawing an arc, the rotation angle of the main board can also be adjusted with the help of the scale line, making it easy to draw an arc with the corresponding angle directly.

[0007] Optionally, a first perforation is provided at the center of the surface of the disc, and the size of the first perforation is the same as that of the second perforation.

[0008] By adopting the above technical solution, the first perforation is used to mark the center position of the circle after drawing it.

[0009] Optionally, a rubber pad is attached to the surface of the locking piece, and the locking piece is anti-slip against the inner surface of the side groove by the rubber pad.

[0010] By adopting the above technical solution, the locking piece can better prevent slipping and adhere to the inner surface of the side groove.

[0011] Optionally, both the main board and the sub-board have sliders fixed at their ends, and the ends of the main board and the sub-board can be slidably placed in a groove via the sliders.

[0012] By adopting the above technical solution, the ends of the main board and the sub-board can be slidably placed in the groove.

[0013] Optionally, the included angle between the main board and the sub-board, and between the two sub-boards, is 120 degrees.

[0014] By adopting the above technical solution, it is ensured that the motherboard and sub-board can rotate stably around the disc.

[0015] Compared with the prior art, the beneficial effects of the technical solution of this application are as follows:

[0016] 1. The technical solution of this application sets a main board and a secondary board connected to the outer ring of a circular plate. The sliders at the ends of the two boards can be slidably placed in the groove of the circular plate, so that the main board and the secondary board can rotate around the circular plate. By using the second perforation on the surface of the adjustable moving board to pass through the pen tip, a circle or arc of the corresponding radius can be drawn. The scale lines set on the surface of the circular plate make it easy to draw the arc of the corresponding angle directly, so that it is not necessary to use a ruler and a protractor to achieve the purpose of drawing an arc of a specified radius and angle, and no pinholes are left, which makes it easy to continue drawing with the center of the circle as the starting point.

[0017] 2. The technical solution of this application draws a circle by using the pen tip to pass through the second hole. Different thicknesses, colors or types of pens can be selected to draw circles or arcs according to needs, making it more convenient to use.

[0018] 3. The technical solution of this application can quickly release the lock on the moving plate by pressing the connecting rod, and can quickly lock the moving plate again after releasing the connecting rod, so as to easily adjust the position of the moving plate and the second through hole to change the radius of the circle to be drawn. Attached Figure Description

[0019] Other features, objects, and advantages of this invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0020] Figure 1 This is a schematic diagram of the overall structure of the mathematical plotter of this utility model;

[0021] Figure 2 This is a detailed structural diagram of the connection between the internal structure of the disc and the main board and the sub-board of the mathematical plotter of this utility model;

[0022] Figure 3 This is a schematic diagram of the cross-sectional structure of the moving plate of the mathematical plotter of this utility model.

[0023] In the diagram: 1. Disc; 11. Slide groove; 12. Angle scale line; 2. Circular piece; 21. First through hole; 3. Main board; 31. Plate groove; 311. Side groove; 32. Through hole; 33. Linear scale line; 4. Sub-plate; 5. Moving plate; 51. Second through hole; 52. Rod groove; 6. Connecting rod; 61. Locking piece; 611. Rubber pad; 62. Spring; 7. Slider. Detailed Implementation

[0024] Please see Figure 1-3This utility model provides a technical solution: a mathematical plotter, including a disk 1, a circular piece 2, and a main board 3. The circular piece 2 is placed at the center of the disk 1, and the main board 3 is connected to the side of the circular piece 2. Two sub-boards 4 are also connected to the sides of the circular piece 2 on both sides of the main board 3. The included angle between the main board 3 and the sub-boards 4 and between the two sub-boards 4 are both 120 degrees. The ends of the main board 3 and the sub-boards 4 are fixed with sliders 7, so that the ends of the main board 3 and the sub-boards 4 can slide against each other in the grooves 11 set in the inner ring of the disk 1 through the sliders 7. When in use, the sliders 7 slide in the grooves 11, so that the main board 3 and the sub-boards 4 can rotate around the circular piece 2.

[0025] A slot 31 is formed inside the motherboard 3 along the direction of the motherboard 3. A movable plate 5 is slidably placed in the slot 31. A second through hole 51 is formed in the middle of the surface of the movable plate 5. A through hole 32 is formed on the surface of the motherboard 3 along the direction of the slot 31, communicating with the slot 31 and passing through it vertically. Line scale lines 33 are evenly arranged on the surface of the motherboard 3 on the side of the through hole 32. The movable plate 5 can slide and change its position inside the slot 31, thereby changing the distance between the second through hole 51 and the center of the disc 2. This distance can be determined and measured by the line scale lines 33.

[0026] To achieve the purpose of locking the movable plate 5 to the desired position, the position of the movable plate 5 is locked in the plate groove 31 by a locking structure. Side grooves 311 communicating with the plate groove 31 are opened on both sides of the plate groove 31. Rod grooves 52 are also opened on both sides of the movable plate 5. A connecting rod 6 is laterally arranged between the rod groove 52 and the side grooves 311. The connecting rod 6 serves as a locking structure, and it can slide through the opening on the side of the main plate 3 communicating with the side groove 311 to the outside. A locking piece 61 is fixed around the outer ring of the connecting rod 6 located in the side groove 311. The locking piece 61 is connected to the movable plate 5. A spring 62 is fitted around the outer ring of the connecting rod 6 between the plates 5. A rubber pad 611 is fixed to the surface of the locking piece 61. The spring 62 abuts against the locking piece 61, causing it to press against the inner surface of the side groove 311 through the rubber pad 611. The end of the connecting rod 6 is placed in the rod groove 52. At this time, the position of the moving plate 5 can be locked. When in use, the pen tip is inserted into the second through hole 51 of the moving plate 5 and pushed. The slider 7 slides in the slide groove 11, causing the main plate 3 and the sub-plate 4 to rotate in the inner ring of the disk 1. Thus, a circle can be drawn with the first through hole 21 as the center.

[0027] A first through hole 21 is provided in the middle of the surface of the circular piece 2. The size of the first through hole 21 is the same as that of the second through hole 51. After drawing the circle, the pen tip can be used to mark the center of the circle through the first through hole 21, which makes it convenient to continue drawing from the center of the circle.

[0028] The end of the connecting rod 6 is welded and fixed to a circular plate. When the connecting rod 6 is pressed by the plate, the spring 62 can be compressed and the locking piece 61 will no longer abut against the inner surface of the side groove 311 through the rubber pad 611, thus releasing the lock on the moving plate 5. The end of the connecting rod 6 is still inserted in the rod groove 52. Then, the moving plate 5 can be moved to a sliding position in the plate groove 31 by sliding the connecting rod 6. After releasing the pressure on the connecting rod 6, the moving plate 5 can be locked again.

[0029] The surface of the disc 1 is evenly provided with angle scale lines 12. When drawing an arc, the rotation angle of the main board 3 can be measured through the angle scale lines 12, so that an arc with the corresponding angle can be drawn as needed.

[0030] In use, the disc 1 is pressed directly onto the surface of the paper. The plate at the end of the connecting rod 6 presses the connecting rod 6, causing it to compress the spring 62 through the locking piece 61. This inserts the end of the connecting rod 6 into the rod groove 52, and the rubber pad 611 on the surface of the locking piece 61 no longer abuts against the surface of the side groove 311, releasing the anti-slip lock on the moving plate 5. Then, the moving plate 5 can be slid within the plate groove 31 by sliding the connecting rod 6. Subsequently, the distance between the first through hole 21 and the second through hole 51 of the moving plate 5 can be adjusted using the scale line 33. This distance is the radius of the circle or arc to be drawn. After adjusting to the desired position, the connecting rod 6 is no longer pressed. Under the reset action of the spring 62, the locking piece 61 is once again anti-slip against the side groove 311 through the rubber pad 611. The inner surface of the groove 311, while the end of the connecting rod 6 is still inserted in the rod groove 52 of the moving plate 5, can achieve the purpose of locking the position of the moving plate 5. Then, the pen tip can be inserted into the second through hole 51 of the moving plate 5 and pushed. The slider 7 slides in the slide groove 11, causing the main plate 3 and the sub-plate 4 to rotate in the inner circle of the disk 1, so that a circle can be drawn with the first through hole 21 as the center. After the circle is drawn, the center position can be marked through the first through hole 21. When it is necessary to draw an arc of the corresponding angle, after adjusting the radius in the above way, first rotate the through hole 32 of the main plate 3 to align with the zero point of the scale line 33. Then, the rotation angle of the main plate 3 can be referenced and controlled by the scale line 33, which makes it easy to draw an arc of the corresponding angle directly.

Claims

1. A mathematical plotter, comprising a disk (1), a disc (2), and a main board (3), characterized in that: The circular piece (2) is placed at the center of the disk (1), the main board (3) is connected to the side of the circular piece (2), and two sub-boards (4) are also connected to the side of the circular piece (2). The ends of the main board (3) and the sub-boards (4) are slidably placed in the groove (11) set in the inner ring of the disk (1). The motherboard (3) has a slot (31) inside, and a movable plate (5) is slidably placed in the slot (31). A second through hole (51) is opened in the middle of the surface of the movable plate (5). The surface of the motherboard (3) has a through hole (32) along the direction of the slot (31) that communicates with the slot (31) and passes through it vertically. Line scale lines (33) are evenly arranged on the surface of the motherboard (3) on the side of the through hole (32). Angle scale lines (12) are evenly arranged on the surface of the disc (1). The position of the movable plate (5) is locked in the slot (31) by a locking structure.

2. The mathematical plotter according to claim 1, characterized in that: Both sides of the plate groove (31) are provided with side grooves (311) communicating with the plate groove (31). The two sides of the movable plate (5) are also provided with rod grooves (52). The locking structure is a connecting rod (6). The connecting rod (6) is arranged horizontally between the rod groove (52) and the side groove (311). The connecting rod (6) can slide through the opening communicating with the side groove (311) on the side of the main plate (3) to the outside. The outer ring of the connecting rod (6) in the side groove (311) is fixed with a locking piece (61). The outer ring of the connecting rod (6) between the locking piece (61) and the movable plate (5) is fitted with a spring (62). The spring (62) abuts against the locking piece (61) and makes it contact the inner surface of the side groove (311). The end of the connecting rod (6) is placed in the rod groove (52).

3. The mathematical plotter according to claim 1, characterized in that: A first perforation (21) is provided at the middle position of the surface of the disc (2), and the size of the first perforation (21) is the same as that of the second perforation (51).

4. The mathematical plotter according to claim 2, characterized in that: A rubber pad (611) is attached to the surface of the locking piece (61), and the locking piece (61) is anti-slip against the inner surface of the side groove (311) through the rubber pad (611).

5. The mathematical plotter according to claim 1, characterized in that: Both the main board (3) and the sub-board (4) are fixed with sliders (7) at their ends, and the ends of the main board (3) and the sub-board (4) can be slidably placed in the slide groove (11) through the sliders (7).

6. The mathematical plotter according to claim 1, characterized in that: The included angle between the main board (3) and the sub-board (4) and between the two sub-boards (4) is 120 degrees.

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