CN109572287B

CN109572287B - Mathematical drawing device

Info

Publication number: CN109572287B
Application number: CN201811547104.9A
Authority: CN
Inventors: 刘景典
Original assignee: Yu Zaiju
Current assignee: Shandong Hengxin Technology Service Co ltd
Priority date: 2018-12-17
Filing date: 2018-12-17
Publication date: 2020-12-11
Anticipated expiration: 2038-12-17
Also published as: CN109572287A

Abstract

The invention discloses a mathematical drawing device, and relates to the technical field of mathematical drawing tools. It comprises a positioning device and a drawing device; the positioning device comprises a horizontal mounting plate; the front end and the rear end of the mounting plate are both vertically and fixedly provided with a supporting plate; the drawing device comprises a central column; a central column is rotatably arranged in the mounting hole through a bearing; a horizontal guide rail is fixed at the left end of the mounting table; a horizontal rack is fixed at the right end of the mounting table; the front side and the rear side of the guide rail are respectively connected with a positioning box in a sliding way; a line drawing pen is arranged in the sleeve in a sliding manner up and down; a fixed point pen is arranged in the guide pipe in a vertical sliding manner; the fixed point pen and the two line drawing pens are on the same straight line; a driving motor is arranged on the front side of the upper end of the mounting plate; the front part of the upper end of the mounting plate is provided with a control panel and a display. The invention has the beneficial effects that: the drawing device has no center pinhole, can assist in drawing various figures, and can realize the measurement of straight line angles by using two points on a straight line.

Description

Mathematical drawing device

Technical Field

The invention relates to the technical field of mathematical drawing tools.

Background

In the mathematics subject, in teaching or study, often need carry out the drawing of plane geometry, drawing tools such as traditional set square, compasses are comparatively single, and compasses commonly used need utilize the stitch to confirm the centre of a circle when drawing, and the location is unstable, and when drawing on the paper, the stitch directly punctures and forms the pinhole, and can be bigger and bigger, causes the error, influences the use of below paper simultaneously. The drawing requirements cannot be well met by common drawing tools like an oval figure. In a mathematical graph, angle measurement generally requires a reference line, an included angle vertex and a measured straight line (and needs a certain length), the error is easy to occur when the included angle vertex is positioned, especially when the round points are pricked by the pinholes to be larger and larger, the measurement is inconvenient, and paper is easy to be stained by the protractor in the use and translation process. In a general design, a processor is used for drawing, various patterns can be drawn, but the drawing is inconvenient to use, cannot be used for measurement, is inconvenient to center and is slow in single-line drawing.

Disclosure of Invention

The technical problem to be solved by the invention is to provide a mathematical drawing instrument aiming at the technical defects. The drawing device has no center pinhole, can assist in drawing various figures, and can realize the measurement of straight line angles by using two points on a straight line.

The technical scheme adopted by the invention is as follows: providing a mathematical drawing device, which comprises a positioning device and a drawing device;

the positioning device comprises a horizontal mounting plate; the front end and the rear end of the mounting plate are both vertically and fixedly provided with a supporting plate; the lower end of each supporting plate is provided with a paper pressing plate in a sliding way; the upper end of the paper pressing plate is provided with a guide groove; reset rubber is fixed at the inner bottom end of the guide groove; the lower part of the supporting plate is connected with the guide groove in a sliding way, and the lower end of the supporting plate is contacted with the reset rubber; the middle part of the mounting plate is provided with a mounting hole;

the drawing device comprises a central column; a central column is rotatably arranged in the mounting hole through a bearing;

the lower end of the central column is fixed with a mounting table; the mounting table is arranged below the mounting plate; a horizontal guide rail is fixed at the left end of the mounting table; a horizontal rack is fixed at the right end of the mounting table; the front side and the rear side of the guide rail are respectively connected with a positioning box in a sliding way; each positioning box is provided with a guide channel in the front-back direction; the rack is in sliding fit with the guide channel; each positioning box is internally provided with a distance adjusting motor; the output end of the pitch adjusting motor is provided with a pitch adjusting gear, and the pitch adjusting gear is meshed with the rack; the middle part of the lower end of each positioning box is provided with a vertical sleeve; elastic rubber is fixed at the upper part in the sleeve; a line drawing pen is arranged in the sleeve in a sliding manner up and down; a guide pipe is vertically fixed in the middle of the bottom end of the mounting table and is coaxial with the central column; the top in the guide tube is provided with an elastic switch; a fixed point pen is arranged in the guide pipe in a vertical sliding manner; the upper end of the fixed point pen is contacted with the elastic switch; the fixed point pen and the two line drawing pens are on the same straight line;

the upper part of the central column is provided with a battery jar; a storage battery is arranged in the battery jar; the outer side of the upper part of the central column is sleeved with a rotating gear; a driving motor is arranged on the front side of the upper end of the mounting plate; the output end of the driving motor is provided with a driving gear; the driving gear is meshed with the rotating gear; an annular protective shell is fixedly sleeved on the outer side of the upper part of the central column, and the driving motor and the driving gear are both arranged in the protective shell; the upper end surface of the protective shell is uniformly provided with angle lines along the ring shape; the side surface of the central column is provided with an indicator in the vertical direction;

the front part of the upper end of the mounting plate is provided with a control panel and a display; a plurality of control buttons are arranged on the control panel; a processor is arranged in the control panel; the control button is electrically connected with the processor; the elastic switch is electrically connected with the processor; the control end of the processor is respectively and electrically connected with the control circuits of the distance adjusting motor and the driving motor; the signal output end of the processor is electrically connected with the display.

Further optimize this technical scheme, the press paper front end face of a mathematics picture plotter evenly is provided with the scale mark along length direction.

Further optimizing the technical scheme, the control button of the mathematical drawing device comprises but is not limited to a diameter adjusting module and an ellipse input module.

Further optimize this technical scheme, a mounting panel, nipper and backup pad of mathematical drawing ware all are transparent plastic material.

Further optimize this technical scheme, a mathematical drawing ware's treater is connected with bluetooth module.

The invention has the beneficial effects that:

1. the positioning device and the drawing device are matched for use, a circle center pinhole is not formed during drawing, shapes such as circles, ellipses, parallel lines and triangles can be drawn in an auxiliary mode, and the angle of the straight line can be measured by using two points on the straight line;

in the drawing device, a rack and pinion structure is arranged on an installation platform, a linear distance between two line drawing pens can be adjusted by utilizing a distance adjusting motor, namely the diameter of a circle, a fixed point pen is arranged at the middle point of the two line drawing pens, the position of the circle center can be pointed out during drawing, the two distance adjusting motors are arranged, the two distance adjusting motors can realize independent adjustment or synchronous adjustment to realize adjustment of different radiuses, the fixed point pen can trigger an elastic switch, so that drawing operation is quicker and more convenient, and the elastic switch is a trigger switch for starting drawing;

the distance adjusting motor is used for controlling and adjusting the distance between the line drawing pen and the fixed point pen, and the driving motor is used for realizing angle rotation and driving the line drawing pen to rotate around a shaft to draw circles and other drawing actions. The pitch adjusting motor and the driving motor are matched to work simultaneously under the control of the processor, so that the ellipse drawing and the like can be realized; the two line drawing pens are two points on a straight line, the angle of inclination of the straight line formed by the two line drawing pens can be read on an angle line on the protective shell, the angle of the corresponding straight line can be measured by taking the paper pressing plate as a datum line, and round points do not need to be determined, so that the method is more convenient and accurate;

2. the scale mark on the front end face of the paper pressing plate is a length measuring scale, and can be used for measuring the length of a straight line or observing, measuring and calculating the translation distance of a line drawing pen, and drawing parallel lines and the like;

3. when drawing a circle or an ellipse, basic data needs to be confirmed and input, the input can be realized through a control panel, a control button on the control panel is a setting end, a processor is a data processing control module, an elastic switch is a trigger switch for starting drawing, a distance adjusting motor and a driving motor are response ends, and a display displays data;

4. the Bluetooth module can be conveniently connected and controlled with the mobile phone, and data input is more convenient.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic diagram of a left side view structure according to the present invention;

FIG. 3 is a schematic view of the split structure of the present invention;

FIG. 4 is an exploded view of the drawing apparatus of the present invention;

FIG. 5 is an exploded view of a portion of the drawing apparatus of the present invention;

FIG. 6 is a block diagram of the logic circuit of the present invention;

in the figure, 1, mounting plate; 2. a support plate; 3. pressing a paper board; 4. a guide groove; 5. resetting the rubber; 6. mounting holes; 7. a central column; 8. an installation table; 9. a guide rail; 10. a rack; 11. a positioning box; 12. a guide channel; 13. a distance-adjusting motor; 14. a pitch adjusting gear; 15. a sleeve; 16. an elastic rubber; 17. a line drawing pen; 18. a guide tube; 19. an elastic switch; 20. a fixed point pen; 21. a battery case; 22. a storage battery; 23. a rotating gear; 24. a drive motor; 25. a drive gear; 26. a protective shell; 27. an angle line; 28. an indicator mark; 29. a control panel; 30. a display; 31. a control button; 32. scale lines are marked.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

As shown in fig. 1-6, a mathematical mapper includes a positioning device and a mapping device;

the positioning device comprises a horizontal mounting plate 1; the front end and the rear end of the mounting plate 1 are vertically and fixedly provided with supporting plates 2; the lower end of each supporting plate 2 is provided with a paper pressing plate 3 in a sliding way; the upper end of the paper pressing plate 3 is provided with a guide groove 4; the inner bottom end of the guide groove 4 is fixed with a reset rubber 5; the lower part of the supporting plate 2 is connected with the guide groove 4 in a sliding way, and the lower end of the supporting plate 2 is contacted with the reset rubber 5; the middle part of the mounting plate 1 is provided with a mounting hole 6; the drawing device comprises a central column 7; a central column 7 is rotatably arranged in the mounting hole 6 through a bearing; the lower end of the central column 7 is fixed with a mounting table 8; the mounting table 8 is arranged below the mounting plate 1; a horizontal guide rail 9 is fixed at the left end of the mounting table 8; a horizontal rack 10 is fixed at the right end of the mounting table 8; the front side and the rear side of the guide rail 9 are respectively connected with a positioning box 11 in a sliding way; each positioning box 11 is provided with a guide channel 12 in the front-back direction; the rack 10 is in sliding fit with the guide channel 12; a distance adjusting motor 13 is arranged in each positioning box 11; the output end of the distance adjusting motor 13 is provided with a distance adjusting gear 14, and the distance adjusting gear 14 is meshed with the rack 10; the middle part of the lower end of each positioning box 11 is provided with a vertical sleeve 15; the inner upper part of the sleeve 15 is fixed with elastic rubber 16; a line drawing pen 17 is arranged in the sleeve 15 in a sliding manner up and down; a guide pipe 18 is vertically fixed in the middle of the bottom end of the mounting table 8, and the guide pipe 18 is coaxial with the central column 7; an elastic switch 19 is arranged at the top in the guide tube 18; a fixed point pen 20 is arranged in the guide tube 18 in a vertical sliding manner; the upper end of the fixed point pen 20 is contacted with the elastic switch 19; the fixed point pen 20 and the two line drawing pens 17 are on the same straight line; the upper part of the central post 7 is provided with a battery groove 21; a storage battery 22 is installed in the battery jar 21; the outer side of the upper part of the central column 7 is sleeved with a rotating gear 23; a driving motor 24 is arranged on the front side of the upper end of the mounting plate 1; the output end of the driving motor 24 is provided with a driving gear 25; the driving gear 25 is meshed with the rotating gear 23; an annular protective shell 26 is fixedly sleeved on the outer side of the upper part of the central column 7, and the driving motor 24 and the driving gear 25 are both arranged in the protective shell 26; the upper end surface of the protective shell 26 is uniformly provided with angle lines 27 along the ring shape; the side surface of the central column 7 is provided with a vertical indicator 28; the front part of the upper end of the mounting plate 1 is provided with a control panel 29 and a display 30; a plurality of control buttons 31 are arranged on the control panel 29; a processor is arranged in the control panel 29; the control button 31 is electrically connected with the processor; the elastic switch 19 is electrically connected with the processor; the control end of the processor is respectively and electrically connected with the control circuits of the distance adjusting motor 13 and the driving motor 24; the signal output end of the processor is electrically connected with the display 30; the front end face of the paper pressing plate 3 is uniformly provided with scale marks 32 along the length direction; control buttons 31 include, but are not limited to, a diameter adjustment module and an elliptical input module; the mounting plate 1, the paper pressing plate 3 and the supporting plate 2 are all made of transparent plastic materials; the processor is connected with a Bluetooth module.

The battery jar 21 is arranged in the central column 7, the storage battery 22 is arranged in the central column to supply power to the whole circuit, the use is convenient, and the solar battery can be suitable for different sizes of products according to different use scenes. The pitch-adjusting motor 13 and the driving motor 24 in the invention both need linear control, and can adopt servo motors so as to facilitate data control and data feedback, and accurately adjust and control the diameter radius, the rotation angle and the like. The invention is similar to the action of stamping when drawing, the pen point of the fixed point pen 20 is lower than the pen point of the line drawing pen 17, and drawing is not carried out when the pen point is lightly placed on paper, at the moment, the paper pressing plate 3 presses paper, so that a drawing area can be positioned and leveled better, but the reset rubber 5 plays a role of supporting the supporting plate 2 upwards by virtue of the elasticity of the reset rubber 5, so that the fixed point pen 20 is in contact with the paper, and the line drawing pen 17 is not in contact with the paper, the setting is convenient to adjust in the using process, when the mounting plate 1 is pressed down, the supporting plate 2 presses down the reset rubber 5, the line drawing pen 17 descends to be in contact with the paper, meanwhile, the elastic switch 19 is pressed at the upper end of the fixed point pen 20, the elastic switch 19 is pressed to be electrified, the processor controls to start drawing, the line drawing pen 17 rotates to draw, and when the pressing force is.

When the invention is used for drawing a circle, the control panel 29 is used for controlling the distance adjusting motor 13 to rotate, the linear distance of the two line drawing pens 17 is adjusted and controlled, namely the diameter of the set circle is placed in a drawing area, so that the fixed point pen 20 is pressed on the center of the circle (if the center of the circle is not fixed, the position of the fixed point pen 20 pressed downwards is the circle center, but the circle center is different from the hole pricking of the traditional compasses), the fixed point pen 20 is pressed downwards, the fixed point pen 20 triggers the elastic switch 19 to be opened, the processor controls the driving motor 24 to rotate, the line drawing pens 17 start to draw a circle around the fixed point pen 20 according to the setting, and the device is lifted after. If concentric circles need to be drawn, the pressure is released but not lifted, the mounting plate 1 is lifted under the elastic support of the reset rubber 5, the fixed point pen 20 is still at the circle center position, the diameter data is reset, and the elastic switch 19 is pressed down again after the adjustment is finished to draw circles; because the two line drawing pens 17 can be independently adjusted by the respective distance adjusting motors 13, when concentric circles are drawn, the radius of each line drawing pen 17 can be independently adjusted, and then drawing can be performed.

When drawing an ellipse, the control panel 29 is used to set the major axis data and the minor axis data of the ellipse, according to the parameter equation formula of the ellipse, x is acos θ, y is bsin θ, a is half of the major axis length, b is half of the minor axis length, it is only necessary to set the values of a and b, and the initial distance between the two line drawing pens 17 can be used as one value of 2a or 2b, that is, the two distance adjusting motors 13 perform initial adjustment and control synchronously, so that the other value is input. The points on the ellipse can be defined by the distance to the dots and the included angle, therefore, the driving motor 24 controls the rotation angle to be the included angle (prompting that the rotation adjustment control of the included angle can be used for measuring the inclination angle of the straight line), the distance control motor 13 controls the distance to be the distance from the points on the ellipse to the dots, and the ellipse can be drawn by matching the two. After the setting is completed, the pointing pen 20 is aligned with the center of the circle, the elastic switch 19 is pressed down to be opened, and the driving motor 24 and the distance-adjusting motor 13 are matched to draw an ellipse under the processing control. Similarly, other mathematical parameter patterns may be drawn under the control of the processor.

When making angle measurements of straight lines. When the straight line of the line drawing pen 17 and the pointing pen 20 is regarded as an actual straight line, the driving motor 24 controls the straight line to rotate around the angle of the midpoint, the line of the side line of the paper pressing plate is taken as a reference line, the angle of the straight line of the line drawing pen 17 is controllable, and the indicating mark 28 on the central column 7 can read the angle line 27. According to the principle, the sidelines of the paper pressing plate are attached to the datum lines of the measured straight lines, the included angle vertexes or dots and the like do not need to be found, the fixed point pen 20 only needs to be adjusted and placed at any position on the measured straight lines, the central column 7 is rotated to drive the line drawing pen 17 to rotate, when the line drawing pen 17 falls on the measured straight lines, the angle can be read from the angle line 27 on the protective shell 26.

According to the angle principle, the invention can assist the fixed point drawing of parallel lines, parallelograms, triangles (for angle fixed point, the straight line of the drawing pen 17 is a bevel edge, the side length can be the distance between the drawing pens 17, and then the drawing with the connected points) and the like with angle requirements. When drawing the parallel line related graph, after setting the distance of the line drawing pen 17, the translation drawing device can be used, the paper pressing plate is the reference of translation, simultaneously, the scale marks 32 are arranged on the paper pressing plate, and the translation distance can be directly measured through the boundary indication of the supporting plate 2.

When drawing circles, ellipses and measuring straight line angles, only one line drawing pen 17 can be installed, when obvious errors occur in matching, the error of a closed figure is easily enlarged due to the increase of the number of the line drawing pens 17, a single line drawing pen 17 can be adopted, and if the error is guaranteed to be very small all the time by material technology, no influence is caused. When drawing a pattern such as a parallel line or a parallelogram, the pointing pen 20 may be removed or only one drawing pen 17 may be attached. In the invention, the slide installation of the line drawing pen 17, the pointing pen 20, the supporting plate 2 and the like requires very small matching errors in the horizontal direction.

In the present invention, the display 30 is connected to the processor for displaying a plurality of controllable feedback data, corresponding to the actual use, without any interpretation limitation, such as displaying the distance between the two line drawing pens 17 and the pointing pen 20. Meanwhile, the control buttons 31 on the control panel 29 correspond to the functions required, and are correspondingly arranged according to the functions, and the specific structural form can be selected according to the requirements. For example, a diameter adjusting module is arranged (total adjustment and sub-adjustment can be performed), namely, the work of the distance adjusting motor 13 is controlled, and the linear distance between the two line drawing pens 17 is adjusted; the ellipse input module is used for setting parameters when drawing an ellipse, namely setting a numerical value or a numerical value b; the conventional specific control state can be in various forms, such as setting an addition and subtraction button, a knob or direct numerical value input and the like; whether the elastic switch 19 draws a circle or an ellipse when being turned on can be distinguished by setting a selection button, and can also be set through logic, for example, if the ellipse input module is not input or the numerical value is the same as that of the diameter adjusting module, the circle is drawn, otherwise, the ellipse is drawn. The specific form of the control button 31 is not detailed herein and can be routinely selected by those skilled in the art based on functional requirements, operational procedures, control habits, etc. Set up bluetooth module joinable cell-phone simultaneously to control through cell-phone APP, then reducible control button 31, and more logic control can appear.

Claims

1. A mathematical plotter characterized in that: comprises a positioning device and a drawing device;

the positioning device comprises a horizontal mounting plate (1); the front end and the rear end of the mounting plate (1) are vertically and fixedly provided with a supporting plate (2); the lower end of each supporting plate (2) is provided with a paper pressing plate (3) in a sliding way; the upper end of the paper pressing plate (3) is provided with a guide groove (4); the inner bottom end of the guide groove (4) is fixed with a reset rubber (5); the lower part of the support plate (2) is connected with the guide groove (4) in a sliding way, and the lower end of the support plate (2) is contacted with the reset rubber (5); the middle part of the mounting plate (1) is provided with a mounting hole (6);

the drawing device comprises a central column (7); a central column (7) is rotatably arranged in the mounting hole (6) through a bearing;

the lower end of the central column (7) is fixed with a mounting table (8); the mounting table (8) is arranged below the mounting plate (1); a horizontal guide rail (9) is fixed at the left end of the mounting table (8); a horizontal rack (10) is fixed at the right end of the mounting table (8); the front side and the rear side of the guide rail (9) are respectively connected with a positioning box (11) in a sliding way; each positioning box (11) is provided with a guide channel (12) in the front-back direction; the rack (10) is in sliding fit with the guide channel (12); a distance adjusting motor (13) is arranged in each positioning box (11); the output end of the distance adjusting motor (13) is provided with a distance adjusting gear (14), and the distance adjusting gear (14) is meshed and connected with the rack (10); the middle part of the lower end of each positioning box (11) is provided with a vertical sleeve (15); an elastic rubber (16) is fixed at the inner upper part of the sleeve (15); a line drawing pen (17) is arranged in the sleeve (15) in a sliding manner up and down; a guide pipe (18) is vertically fixed in the middle of the bottom end of the mounting table (8), and the guide pipe (18) is coaxial with the central column (7); an elastic switch (19) is arranged at the top in the guide tube (18); a fixed point pen (20) is arranged in the guide tube (18) in a vertical sliding manner; the upper end of the fixed point pen (20) is contacted with the elastic switch (19); the fixed point pen (20) and the two line drawing pens (17) are on the same straight line;

the upper part of the central column (7) is provided with a battery groove (21); a storage battery (22) is arranged in the battery tank (21); the outer side of the upper part of the central column (7) is sleeved with a rotating gear (23); a driving motor (24) is arranged on the front side of the upper end of the mounting plate (1); the output end of the driving motor (24) is provided with a driving gear (25); the driving gear (25) is meshed with the rotating gear (23); an annular protective shell (26) is fixedly sleeved on the outer side of the upper part of the central column (7), and the driving motor (24) and the driving gear (25) are both arranged in the protective shell (26); the upper end surface of the protective shell (26) is uniformly provided with angle lines (27) along the ring shape; the side surface of the central column (7) is provided with an indicator (28) in the vertical direction;

the front part of the upper end of the mounting plate (1) is provided with a control panel (29) and a display (30); a plurality of control buttons (31) are arranged on the control panel (29); a processor is arranged in the control panel (29); the control button (31) is electrically connected with the processor; the elastic switch (19) is electrically connected with the processor; the control end of the processor is respectively and electrically connected with the control circuits of the distance adjusting motor (13) and the driving motor (24); the signal output end of the processor is electrically connected with a display (30).

2. A mathematical mapper in accordance with claim 1, wherein: the front end face of the paper pressing plate (3) is uniformly provided with scale marks (32) along the length direction.

3. A mathematical mapper in accordance with claim 1, wherein: the control buttons (31) include, but are not limited to, a diameter adjustment module and an elliptical input module.

4. A mathematical mapper in accordance with claim 1, wherein: the mounting plate (1), the paper pressing plate (3) and the support plate (2) are all made of transparent plastic materials.

5. A mathematical mapper in accordance with claim 1, wherein: the processor is connected with a Bluetooth module.