CN109572286A - A kind of mathematics drawing instruments - Google Patents
A kind of mathematics drawing instruments Download PDFInfo
- Publication number
- CN109572286A CN109572286A CN201811547103.4A CN201811547103A CN109572286A CN 109572286 A CN109572286 A CN 109572286A CN 201811547103 A CN201811547103 A CN 201811547103A CN 109572286 A CN109572286 A CN 109572286A
- Authority
- CN
- China
- Prior art keywords
- newel
- mounting plate
- pen
- gear
- processor
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B43—WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
- B43L—ARTICLES FOR WRITING OR DRAWING UPON; WRITING OR DRAWING AIDS; ACCESSORIES FOR WRITING OR DRAWING
- B43L13/00—Drawing instruments, or writing or drawing appliances or accessories not otherwise provided for
- B43L13/001—Mathematical drawing instruments
Landscapes
- Toys (AREA)
Abstract
The invention discloses a kind of mathematics drawing instruments, are related to mathematics drawing tools technical field.It includes positioning device and drawing device；The positioning device includes horizontal mounting plate；The rear and front end of mounting plate is vertically fixedly installed with support plate；The drawing device includes newel；It is slid back and forth in each guide channel and rack gear is installed；It is slided up and down in casing and detail pen is installed；It is slided up and down in guide pipe and fixed point pen is installed；Pinpoint pen and two detail pens on the same line；The lower part of newel is equipped with distance-adjusting motor；Mounting plate upper end installed in front has driving motor；The upper surface of protective shell is evenly arranged with angle line along annular；The upper-end front of mounting plate is equipped with control panel and display.The beneficial effects of the present invention are: the drafting of a variety of figures can be assisted, it can be achieved that using two-point measurement straight line angle on straight line without the center of circle pin hole when drawing.
Description
Technical field
The present invention relates to mathematics drawing tools technical fields.
Background technique
In Mathematics Discipline, in teaching or study, it is often necessary to carry out the drafting of plane geometric figure, traditional triangle
The drawing tools such as ruler, compasses are more single, and common compasses need to determine the center of circle using stitch when drawing, and position simultaneously
Unstable, when drawing on paper, stitch directly punctures to form pin hole, and can be increasing, causes error, while influencing lower section
The use of paper.Elliptical figure, general drawing tools can not meet drawing requirements well.In mathematic graph,
The measurement of angle generally requires reference line, angle vertex, tested straight line, and error easily occurs in locating clip angular vertex, especially above-mentioned
Described dot by pin hole prick it is increasing when, make troubles to measurement, protractor easily makes paper dirty in using translation motion
?.It is drawn in general design using processor, it is inconvenient to use although multiple patterns can be drawn, it can not be used to survey
Amount, centralized positioning is inconvenient, and single line is drawn slower.
Summary of the invention
The technical problems to be solved by the invention are to provide a kind of mathematics drawing instruments for above-mentioned technical deficiency.
Without the center of circle pin hole when picture, the drafting of a variety of figures can be assisted, it can be achieved that using two-point measurement straight line angle on straight line.
The technical solution adopted by the present invention is that: a kind of mathematics drawing instruments, including positioning device and drawing device are provided；
The positioning device includes horizontal mounting plate；The rear and front end of mounting plate is vertically fixedly installed with support
Plate；Each support plate lower end is slidably fitted with pressboard；Pressboard upper end is provided with guide groove；Bottom end is fixed with multiple in guide groove
Position rubber；Support plate lower part is slidably connected with guide groove, support plate lower end and reset rubber contact；Installation is provided in the middle part of mounting plate
Hole；
The drawing device includes newel；Newel is rotatablely installed by bearing in mounting hole；
The lower end of newel is fixed with installs case；Installs case is below mounting plate；The left and right two of installs case front and back is passed through
It wears and is equipped with guide channel；It is slid back and forth in each guide channel and rack gear is installed；The rear end of the rack gear in left side and right side
The front end of rack gear is fixedly installed with vertical casing respectively；Casing internal upper part is fixed with elastic rubber；Peace is slided up and down in casing
Equipped with detail pen；The center bottom of installs case is vertically and fixedly provided with guide pipe, and guide pipe is coaxial with newel；Guide pipe inner top peace
Equipped with elastic switch；It is slided up and down in guide pipe and fixed point pen is installed；A fixed point upper end is contacted with elastic switch；Pinpoint pen and two
A detail pen is on the same line；
The lower part of newel is equipped with distance-adjusting motor；The output end of distance-adjusting motor extends downward into installs case, and roll adjustment
The output end lower end of motor is equipped with roll adjustment gear；Roll adjustment gear engages connection with the rack gear of the left and right sides；It opens on newel top
There is battery case；Battery is installed in battery case；The upper outside of newel is socketed with rotate gear；Peace on front side of mounting plate upper end
Equipped with driving motor；The output end of driving motor is equipped with driving gear；Driving gear engages connection with rotate gear；Newel
Upper outside fixing sleeve is connected to the protective shell of annular, and driving motor and driving gear are in protective shell；The upper surface of protective shell
Angle line is evenly arranged with along annular；The side of newel is provided with the indicateing arm of vertical direction；
The upper-end front of mounting plate is equipped with control panel and display；Multiple control buttons are provided on control panel；
Processor is provided in control panel；Control button is electrically connected with processor；Elastic switch is electrically connected with processor；Processor
Control terminal is electrically connected with the control circuit of both distance-adjusting motor and driving motor respectively；The signal output end and display of processor
Electrical connection.
Advanced optimize the technical program, a kind of pressboard front end face of mathematics drawing instruments is evenly arranged with along its length
Graduation mark.
Advanced optimize the technical program, a kind of control button of mathematics drawing instruments includes but is not limited to diameter adjustment module
With oval input module.
Advanced optimize the technical program, a kind of mounting plate, pressboard and the support plate of mathematics drawing instruments are all transparent modeling
Expect material.
Advanced optimize the technical program, a kind of processor of mathematics drawing instruments is connected with bluetooth module.
The beneficial effects of the invention are that:
1, both positioning device and drawing device are used cooperatively, and without the center of circle pin hole when picture, can assist picture circle, oval, flat
The shapes such as line, triangle are, it can be achieved that utilize two-point measurement straight line angle on straight line；
In drawing device, gear & rack structure is installed in installs case, is adjusted between two detail pens using roll adjustment rack gear
Linear distance, as diameter of a circle, fixed point pen can point out the position in the center of circle at the midpoint of two detail pens, picture, be not necessarily to
The stitch of traditional compasses, and pinpoint pen and can trigger elastic switch, making to draw operates faster convenience, and elastic switch is to start to draw
Trigger switch；
Distance-adjusting motor is used to control to adjust the spacing of two detail pens, and driving motor is for realizing angular turn, band animation
Line pivoting carries out the drawing actions such as picture circle.It is controlled by processor, distance-adjusting motor and driving motor cooperating simultaneously,
Picture ellipse etc. can be achieved；Two detail pens are two points on straight line, the straight incline angle that two detail pens are formed
It can be read in the angle line on protective shell, be benchmark line by tension disc, the angle of corresponding straight line can be measured, do not needed to determine
Dot, it is accurate to be more convenient；
2, the graduation mark of tension disc front end face is length measuring ruler, can carry out straight length measurement, or observation measuring and calculating picture
The translation distance of line pen, for drawing parallel lines；
3, it when drawing circle or drawing oval, needs to carry out the confirmation input of basic data, can be realized by control panel, control plane
Control button on plate is setting end, and processor is data processing and control module, and elastic switch is the trigger switch that starting is drawn,
Distance-adjusting motor and driving motor are responder, and display displays data；
4, the setting of bluetooth module, which can facilitate, establishes connection and control with mobile phone, and data input is more convenient.
Detailed description of the invention
Fig. 1 is the structural diagram of the present invention；
Fig. 2 is left side perspective structural schematic diagram of the invention；
Fig. 3 is fractionation structural representation of the invention；
Fig. 4 is drawing device decomposition texture schematic diagram of the invention；
Fig. 5 is drawing device part-structure decomposition diagram of the invention；
Fig. 6 is logic circuit diagram of the invention；
In figure, 1, mounting plate；2, support plate；3, pressboard；4, guide groove；5, rubber is resetted；6, mounting hole；7, center
Column；8, installs case；9, guide channel；10, rack gear；11, casing；12, elastic rubber；13, detail pen；14, guide pipe；15, bullet
Power switch；16, pen is pinpointed；17, distance-adjusting motor；18, roll adjustment gear；19, battery case；20, battery；21, rotate gear；22,
Driving motor；23, gear is driven；24, protective shell；25, angle line；26, indicateing arm；27, control panel；28, display；29,
Control button；30, graduation mark.
Specific embodiment
The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.
As shown in figures 1 to 6, a kind of mathematics drawing instruments, including positioning device and drawing device；
The positioning device includes horizontal mounting plate 1；The rear and front end of mounting plate 1 is vertically fixedly installed with support
Plate 2；Each 2 lower end of support plate is slidably fitted with pressboard 3；3 upper end of pressboard is provided with guide groove 4；Bottom end is solid in guide groove 4
Surely have and reset rubber 5；2 lower part of support plate is slidably connected with guide groove 4, and 2 lower end of support plate is contacted with rubber 5 is resetted；Mounting plate 1
Middle part is provided with mounting hole 6；The drawing device includes newel 7；Newel 7 is rotatablely installed by bearing in mounting hole 6；In
The lower end of stem 7 is fixed with installs case 8；Installs case 8 is below mounting plate 1；The left and right two of installs case 8 front and back is through setting
There is guide channel 9；It is slid back and forth in each guide channel 9 and rack gear 10 is installed；The rear end of the rack gear 10 in left side and right side
The front end of rack gear 10 is fixedly installed with vertical casing 11 respectively；11 internal upper part of casing is fixed with elastic rubber 12；In casing 11
It slides up and down and detail pen 13 is installed；The center bottom of installs case 8 is vertically and fixedly provided with guide pipe 14, guide pipe 14 and newel 7
Coaxially；14 inner top of guide pipe is equipped with elastic switch 15；It is slided up and down in guide pipe 14 and fixed point pen 16 is installed；Pinpoint pen 16
Upper end is contacted with elastic switch 15；Pinpoint pen 16 and two detail pens 13 on the same line；The lower part of newel 7 is equipped with tune
Away from motor 17；The output end of distance-adjusting motor 17 extends downward into installs case 8, and the output end lower end of distance-adjusting motor 17 is equipped with
Roll adjustment gear 18；Roll adjustment gear 18 engages connection with the rack gear 10 of the left and right sides；7 top of newel is provided with battery case 19；Battery
Battery 20 is installed in slot 19；The upper outside of newel 7 is socketed with rotate gear 21；1 upper end installed in front of mounting plate has
Driving motor 22；The output end of driving motor 22 is equipped with driving gear 23；Gear 23 is driven to engage connection with rotate gear 21；
7 upper outside fixing sleeve of newel is connected to the protective shell 24 of annular, and driving motor 22 and driving gear 23 are in protective shell 24；
The upper surface of protective shell 24 is evenly arranged with angle line 25 along annular；The side of newel 7 is provided with the indicateing arm of vertical direction
26；The upper-end front of mounting plate 1 is equipped with control panel 27 and display 28；Multiple control buttons are provided on control panel 27
29；Processor is provided in control panel 27；Control button 29 is electrically connected with processor；Elastic switch 15 is electrically connected with processor
It connects；The control terminal of processor is electrically connected with the control circuit of both distance-adjusting motor 17 and driving motor 22 respectively；The letter of processor
Number output end is electrically connected with display 28；3 front end face of pressboard is evenly arranged with graduation mark 30 along its length；Control button 29
Including but not limited to diameter adjustment module and oval input module；Mounting plate 1, pressboard 3 and support plate 2 are all transparent plastic material
Matter；Processor is connected with bluetooth module.
Battery case 19 is set in newel 7 of the invention, carries battery 20 and powers for entire circuit, it is easy to use, this
Invention can according to different usage scenarios be applicable in different size product type carry out using.Distance-adjusting motor 17 and driving in the present invention
Motor 22 is both needed to Linear Control, and servo motor can be used, in order to data control and data feedback, accurate adjusting control diameter,
Rotational angle etc..When drawing similar to the movement affixed one's seal, the pen tip for pinpointing pen 16 is lower than 13 pen tip of detail pen, puts down gently the present invention
It does not draw when on paper, pressboard 3 pushes down paper at this time, can preferably position smooth drawing area, but reset rubber 5
By itself elasticity upward supporting role is played to support plate 2, make pinpoint pen 16 contacted with paper, and detail pen 13 not with paper
Contact, the adjusting during this setting is easy to use, when pushing mounting plate 1, then support plate 2, which pushes, resets rubber 5, detail pen
13 declines are contacted with paper, while pinpointing 16 upper end of pen pressing elastic switch 15, and elastic switch 15, which is pressurized, to be powered, and processor control is opened
Picture is opened, the rotation of detail pen 13 is drawn, and when unclamping lower pressure, elastic switch 15 bounces power-off, stops drawing.
The present invention is drawing bowlder, controls distance-adjusting motor 17 using control panel 27 and rotates, regulates and controls the straight of two detail pens 13
Linear distance, i.e. setting diameter of a circle, are placed on drawing area, are pressed in fixed point pen 16 on the center of circle (if non-centering, pinpoints pen
16 depressed positions draw the center of circle, but are different from the bundle hole of traditional compasses), it pushes, fixed point pen 16 triggers elastic switch 15, processing
Device controls driving motor 22 and rotates, and detail pen 13 starts to draw circle around fixed point pen 16 according to setting, and uplifting device is after completing picture circle
It can.If desired concentric circles is drawn, then unclamps pressure, when not lift, under the resilient support for resetting rubber 5, mounting plate 1 rises,
Pen 16 is pinpointed still in center location, is reset diameter data, after the completion of adjusting, is pushed again, trigger elastic switch 15, carries out
Draw circle.
When drawing oval, elliptical long axis data and short axle data are set using control panel 27, according to elliptical
Parametric equation formula, x=acos θ, y=bsin θ, a are the half of long axial length, and b is the long half of short axle, set the numerical value of a and b
, and the initial distance between two detail pens 13 can be used as the one of numerical value of 2a or 2b, i.e. 17 motor of distance-adjusting motor
Initially regulated and controled, therefore inputs another numerical value again.Point on ellipse can by dot distance and angle define,
Therefore, it is that (prompt: the rotation of this angle adjusts control can be used to inclining for straight line to angle that driving motor 22, which controls rotational angle,
Rake angle measurement), 17 command range of distance-adjusting motor is distance of the point on ellipse to dot, and the two cooperation can draw ellipse
Circle.After the completion of setting, pinpoints pen 16 and be directed at the center of circle, push opening elastic switch 15, under processing control, driving motor 22 and tune
Cooperate away from motor 17 and realizes that picture is oval.Similarly, it can be controlled by processor and draw other mathematic parameter figures.
When carrying out the angle measurement of straight line.Regard detail pen 13 and fixed point 16 place straight line of pen as a physical presence
Straight line, then it is benchmark line with tension disc sideline that driving motor 22 controls this straight line around the angular turn at midpoint online, setting-out
13 place straight line angles of pen are controllable it is found that can be read by the 26 corresponding angle line 25 of indicateing arm on newel 7.According to above-mentioned original
The sideline of tension disc is bonded the reference line of measured straight line by reason, without looking for angle vertex or dot etc., need to will only pinpoint pen 16
Positioning is placed on any position on surveyed straight line, and center of rotation column 7 drives detail pen 13 to rotate, and surveys directly when detail pen 13 is fallen in
On line, from 25 reading angular of angle line on protective shell 24.
According to above-mentioned angle principle, the present invention can assist the parallel lines of the fixed point angled requirement in picture sideline, parallel four
Side shape, triangle (carry out angle fixed point, 13 place straight line of detail pen is a bevel edge, and side length can be 13 spacing of detail pen, then connect
Point is drawn) etc..Draw parallel lines relational graph when, set detail pen 13 after, translate drawing device, tension disc is
The benchmark of translation, while graduation mark 30 is set on tension disc, it is indicated by the boundary of support plate 2, can directly measure translation
Distance.
When drawing circle, drawing ellipse, measurement straight line angle, a detail pen 13 can also be only installed, when obvious miss occurs in cooperation
When poor, and the increase of 13 quantity of detail pen easily expands the error of closed figures, then single detail pen 13 can be used, if material technique
Guarantee that error is very small always, does not then impact.When drawing parallel lines or the figures such as parallelogram, fixed point pen 16 can be removed
Or a detail pen 13 is only installed.It is slidably installed, is both needed to non-described in detail pen 13, fixed point pen 16, support plate 2 etc. in the present invention
The mismatch error of often small horizontal direction.
In the present invention, display 28 is connect for showing multiple controllable and measurable data with processor, opposite with actual use
Should, it is limited without explaining, such as the spacing etc. of two detail pens 13 of display.The control on control panel 27 is pressed simultaneously
Button 29 is corresponding with needed for function, is arranged accordingly according to function, specific constructive form can be selected according to demand.
Such as setting diameter adjustment module, that is, the work of distance-adjusting motor 17 is controlled, the straight line spacing between two detail pens 13 is adjusted；It is ellipse
Circle input module is used for parameter setting when picture ellipse, the as setting of a or b numerical value；Conventional specific state of a control exists more
Kind form can be used, such as setting plus-minus button, knob or the input of direct numerical value etc.；Elastic switch 15 open when be picture circle or
Drawing ellipse can be distinguished by setting select button, can also be set by logic, for example oval input module is not inputted or counted
Value is identical as diameter adjustment module, then is to draw circle, otherwise draws oval.The concrete form present invention of control button 29 does not do careful exhibition
Show, those skilled in the art can carry out conventional selection according to functional requirement, operating process and control habit etc..Indigo plant is set simultaneously
Tooth module can connect mobile phone, and be controlled by cell phone application, then can reduce control button 29, and may occur in which more logics
Control.
Claims (5)
1. a kind of mathematics drawing instruments, it is characterised in that: including positioning device and drawing device；
The positioning device includes horizontal mounting plate (1)；The rear and front end of mounting plate (1) is vertically fixedly installed with support
Plate (2)；Each support plate (2) lower end is slidably fitted with pressboard (3)；Pressboard (3) upper end is provided with guide groove (4)；Guiding
Slot (4) interior bottom end, which is fixed with, resets rubber (5)；Support plate (2) lower part is slidably connected with guide groove (4), support plate (2) lower end with
Reset rubber (5) contact；Mounting hole (6) are provided in the middle part of mounting plate (1)；
The drawing device includes newel (7)；Newel (7) are rotatablely installed by bearing in mounting hole (6)；
The lower end of newel (7) is fixed with installs case (8)；Installs case (8) is below mounting plate (1)；The left and right two of installs case (8)
Portion front and back is provided through guide channel (9)；It is slid back and forth in each guide channel (9) and rack gear (10) is installed；Left side
The rear end of rack gear (10) and the front end of rack gear (10) on right side be fixedly installed with vertical casing (11) respectively；In casing (11)
Top is fixed with elastic rubber (12)；It is slided up and down in casing (11) and detail pen (13) is installed；The center bottom of installs case (8)
It is vertically and fixedly provided with guide pipe (14), guide pipe (14) and newel (7) are coaxial；Guide pipe (14) inner top is equipped with elastic switch
(15)；It is slided up and down in guide pipe (14) and fixed point pen (16) is installed；Fixed point pen (16) upper end is contacted with elastic switch (15)；It is fixed
Point pen (16) and two detail pens (13) are on the same line；
The lower part of newel (7) is equipped with distance-adjusting motor (17)；The output end of distance-adjusting motor (17) extends downward into installs case (8)
It is interior, and the output end lower end of distance-adjusting motor (17) is equipped with roll adjustment gear (18)；The rack gear of roll adjustment gear (18) and the left and right sides
(10) engagement connection；Newel (7) top is provided with battery case (19)；Battery (20) are installed in battery case (19)；Newel
(7) upper outside is socketed with rotate gear (21)；Mounting plate (1) upper end installed in front has driving motor (22)；Driving motor
(22) output end is equipped with driving gear (23)；Gear (23) are driven to engage connection with rotate gear (21)；On newel (7)
Fixing sleeve is connected to the protective shell (24) of annular on the outside of portion, and driving motor (22) and driving gear (23) are in protective shell (24)；
The upper surface of protective shell (24) is evenly arranged with angle line (25) along annular；The side of newel (7) is provided with vertical direction
Indicateing arm (26)；
The upper-end front of mounting plate (1) is equipped with control panel (27) and display (28)；It is provided on control panel (27) more
A control button (29)；Processor is provided in control panel (27)；Control button (29) is electrically connected with processor；Elastic switch
(15) it is electrically connected with processor；The control terminal of processor is electric with the control of both distance-adjusting motor (17) and driving motor (22) respectively
Road electrical connection；The signal output end of processor is electrically connected with display (28).
2. a kind of mathematics drawing instruments according to claim 1, it is characterised in that: pressboard (3) front end face is along its length
It is evenly arranged with graduation mark (30).
3. a kind of mathematics drawing instruments according to claim 1, it is characterised in that: control button (29) includes but is not limited to straight
Diameter adjustment module and oval input module.
4. a kind of mathematics drawing instruments according to claim 1, it is characterised in that: mounting plate (1), pressboard (3) and support
Plate (2) is all transparent plastics material.
5. a kind of mathematics drawing instruments according to claim 1, it is characterised in that: processor is connected with bluetooth module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811547103.4A CN109572286B (en) | 2018-12-17 | 2018-12-17 | Mathematical drawing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811547103.4A CN109572286B (en) | 2018-12-17 | 2018-12-17 | Mathematical drawing device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109572286A true CN109572286A (en) | 2019-04-05 |
| CN109572286B CN109572286B (en) | 2020-07-03 |
Family
ID=65930638
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811547103.4A Expired - Fee Related CN109572286B (en) | 2018-12-17 | 2018-12-17 | Mathematical drawing device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109572286B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112706547A (en) * | 2021-01-13 | 2021-04-27 | 曲靖师范学院 | Precision mathematical calculation meter-making device |
| CN112793339A (en) * | 2021-02-04 | 2021-05-14 | 日照职业技术学院 | Mathematics teaching is with automatic drawing device |
| CN113276585A (en) * | 2021-05-18 | 2021-08-20 | 闽南师范大学 | Surveying and mapping device |
| CN114083927A (en) * | 2021-11-15 | 2022-02-25 | 哈尔滨学院 | Mathematical teaching auxiliary device and operation method |
Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB229189A (en) * | 1924-07-21 | 1925-02-19 | John Douglas Mcleod | Improvements in protractors |
| GB457594A (en) * | 1936-05-21 | 1936-12-01 | John William Jambura | Improvements in or relating to protractors and like instruments for use in drawing and measuring angles |
| CN2166970Y (en) * | 1993-06-02 | 1994-06-01 | 熊康新 | Two-purpose compass for drawing ellipses and circular |
| CN2415940Y (en) * | 1999-12-06 | 2001-01-24 | 雷建锋 | Multi-function compasses |
| US7165331B1 (en) * | 2005-05-24 | 2007-01-23 | Micro Processing Technology, Inc. | Apparatus and method for scribing a semiconductor wafer while controlling scribing forces |
| CN201245008Y (en) * | 2008-09-02 | 2009-05-27 | 张建忠 | Semiautomatic compasses |
| CN202088747U (en) * | 2011-05-31 | 2011-12-28 | 刘伟秋 | Teaching aid used for ellipse drawing and provided with long and short shafts capable of being adjusted conveniently |
| CN203697775U (en) * | 2014-02-16 | 2014-07-09 | 刘欢欢 | Drawing board for mechanical drawing |
| CN104527272A (en) * | 2014-12-11 | 2015-04-22 | 苏州市职业大学 | Napier's compasses |
| CN204870229U (en) * | 2015-08-18 | 2015-12-16 | 金陵科技学院 | Oval instrument of construction drawing |
| US20180290484A1 (en) * | 2017-04-11 | 2018-10-11 | Hojjatollah Salimi | Plotter apparatus and methods for drawing a polygon inscribed within a circle |
-
2018
- 2018-12-17 CN CN201811547103.4A patent/CN109572286B/en not_active Expired - Fee Related
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB229189A (en) * | 1924-07-21 | 1925-02-19 | John Douglas Mcleod | Improvements in protractors |
| GB457594A (en) * | 1936-05-21 | 1936-12-01 | John William Jambura | Improvements in or relating to protractors and like instruments for use in drawing and measuring angles |
| CN2166970Y (en) * | 1993-06-02 | 1994-06-01 | 熊康新 | Two-purpose compass for drawing ellipses and circular |
| CN2415940Y (en) * | 1999-12-06 | 2001-01-24 | 雷建锋 | Multi-function compasses |
| US7165331B1 (en) * | 2005-05-24 | 2007-01-23 | Micro Processing Technology, Inc. | Apparatus and method for scribing a semiconductor wafer while controlling scribing forces |
| CN201245008Y (en) * | 2008-09-02 | 2009-05-27 | 张建忠 | Semiautomatic compasses |
| CN202088747U (en) * | 2011-05-31 | 2011-12-28 | 刘伟秋 | Teaching aid used for ellipse drawing and provided with long and short shafts capable of being adjusted conveniently |
| CN203697775U (en) * | 2014-02-16 | 2014-07-09 | 刘欢欢 | Drawing board for mechanical drawing |
| CN104527272A (en) * | 2014-12-11 | 2015-04-22 | 苏州市职业大学 | Napier's compasses |
| CN204870229U (en) * | 2015-08-18 | 2015-12-16 | 金陵科技学院 | Oval instrument of construction drawing |
| US20180290484A1 (en) * | 2017-04-11 | 2018-10-11 | Hojjatollah Salimi | Plotter apparatus and methods for drawing a polygon inscribed within a circle |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112706547A (en) * | 2021-01-13 | 2021-04-27 | 曲靖师范学院 | Precision mathematical calculation meter-making device |
| CN112793339A (en) * | 2021-02-04 | 2021-05-14 | 日照职业技术学院 | Mathematics teaching is with automatic drawing device |
| CN113276585A (en) * | 2021-05-18 | 2021-08-20 | 闽南师范大学 | Surveying and mapping device |
| CN114083927A (en) * | 2021-11-15 | 2022-02-25 | 哈尔滨学院 | Mathematical teaching auxiliary device and operation method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109572286B (en) | 2020-07-03 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109572286A (en) | A kind of mathematics drawing instruments | |
| CN102679927B (en) | Measuring device and use method thereof | |
| US11752798B2 (en) | Measuring and drawing device | |
| US4246703A (en) | Electronic drafting instrument with digital readout of displacement | |
| CN109572287A (en) | A kind of mathematics drawing instruments | |
| CN210322782U (en) | High-precision fabric density tester based on moire fringes | |
| CN101398302A (en) | Front inclination angle measurement mechanism for motorcycle | |
| CN2929710Y (en) | Refraction index meter | |
| US3778905A (en) | Scribing instruments | |
| CN208313562U (en) | A kind of experimental provision measuring refractive index | |
| CN207231447U (en) | A kind of automatic-positioning type cylindricity measurement measurer | |
| CN210581158U (en) | Tool ruler for dress designing | |
| CN206945536U (en) | Sample transparency measures annex | |
| CN221549576U (en) | Portable protractor for bridge design | |
| CN219096366U (en) | Square plastic ruler | |
| CN204831542U (en) | Laboratory is with device of inspection LCD supplied materials luminance | |
| CN219505739U (en) | Special ruler for drawing light refraction | |
| CN206353397U (en) | The parallelogram rule experimental provision of Hooke's law and power | |
| CN220147060U (en) | Mathematics integration multifunctional teaching ruler | |
| CN2183161Y (en) | Positioning ruler for cranium puncture | |
| CN219191750U (en) | Portable plotter | |
| CN214240209U (en) | Multifunctional auxiliary drawing rule for teaching | |
| CN102062569A (en) | Measurement board for measuring root and seedling lengths of cereal seedling | |
| CN221305970U (en) | Function detection device for mobile phone display screen | |
| CN211060836U (en) | Plant organ measuring and recording instrument |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200703 Termination date: 20201217 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |