CN105984260A  Multifunctional drawing tool for mathematics teacher  Google Patents
Multifunctional drawing tool for mathematics teacher Download PDFInfo
 Publication number
 CN105984260A CN105984260A CN201510089373.5A CN201510089373A CN105984260A CN 105984260 A CN105984260 A CN 105984260A CN 201510089373 A CN201510089373 A CN 201510089373A CN 105984260 A CN105984260 A CN 105984260A
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 China
 Prior art keywords
 protractor
 ruler
 auxiliary scale
 initial point
 circular
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 235000012489 doughnuts Nutrition 0.000 claims description 11
 230000002093 peripheral Effects 0.000 abstract 1
 238000010586 diagram Methods 0.000 description 3
 230000000694 effects Effects 0.000 description 1
 230000002787 reinforcement Effects 0.000 description 1
Abstract
The invention relates to a teaching aid and particularly relates to a multifunctional drawing tool for a mathematics teacher. The multifunctional drawing tool comprises a ruler, a circular plate and a semicircular plate, wherein the middle of the circular plate is hollowed; a plurality of concentric circular rings are arranged at the hollowed part and are connected with a protractor; the protractor is connected with the ruler; an extended line at the upper end of the ruler passes through the original point of the protractor; an arcshaped groove is formed in the peripheral wall of the protractor; a straight strip groove is formed in the ruler; the arcshaped groove communicates with the straight strip groove; an auxiliary scale is arranged in the straight strip groove; an extended line at the upper end of the auxiliary scale passes through the original point of the protractor; an arcshaped slide block is arranged at the left end of the auxiliary scale and is located in the arcshaped groove; the auxiliary scale can make circular motion around the original point of the protractor; and circle drawing holes are also formed in the ruler. According to the multifunctional drawing tool, the ruler is combined with the protractor, and the auxiliary scale is also assisted, so that a straight line can be drawn, an angle can be measured, an angle with known angularity can be drawn, and circles with different diameters can also be drawn, so that the multifunctional drawing tool is a multipurpose object and is simple in use and convenient to carry.
Description
(1) technical field
The present invention relates to a kind of teaching aid, particularly to a kind of math teacher multifunctional drawing tool.
(2) background technology
Although science and technology is flourishing at present, a lot of schools all use multimedia teaching, but some aspect need nonetheless remain for using original educational aid, such as draw, the most preferably to be taught by doing and illustrating by teacher, onthespot by teacher draws to children's impression intuitively, reinforcement understands, conventional drawing tools includes ruler, set square, protractor etc., and each of which is individually present, and brings inconvenience to carrying of teachers.
(3) summary of the invention
The present invention is in order to make up the defect of prior art, it is provided that a kind of math teacher multifunctional drawing tool easy to carry.
The present invention is achieved through the following technical solutions:
nullA kind of math teacher multifunctional drawing tool，It is characterized in that: include ruler、Plectane，Described plectane is made into integration by protractor and semicircular plate，Circular openwork part is had in the middle of described plectane，The described circular center of circle of openwork part overlaps with the initial point of protractor，It is provided with some donuts in described circular openwork part，The center of circle of these donuts overlaps with the initial point of protractor，Wherein minimum annulus can only hold chalk and insert，Described donut is connected with protractor by connecting rod，The righthand member of described protractor is fixing with the left end of ruler to be connected，The initial point of the extended line throughput hornwork of the upper end of described ruler，Arcuate groove is had on the arcuate perimeter wall of described protractor，The cross section of described arcuate groove is convex shape，Vertical bar shaped groove is had in the upper end wall of described ruler，Described arcuate groove is connected with vertical bar shaped groove，It is provided with auxiliary scale in described vertical bar shaped groove，The initial point of the extended line throughput hornwork of the upper end of described auxiliary scale，The left end of described auxiliary scale is provided with arc shaped slider，Described arc shaped slider is positioned at arcuate groove，Described auxiliary scale can move in a circle with the initial point of protractor；Described ruler is provided with some picture circular holes.
The invention has the beneficial effects as follows:
Ruler and protractor are combined by the present invention, have again the help of auxiliary scale, portray straight line, can also portray the angle of known angle by measuring angle, it is also possible to draw the circle of differentdiameter, oneobjectmanypurposes, use simple and easy to carry.
(4) accompanying drawing explanation
The present invention is further illustrated below in conjunction with the accompanying drawings.
Fig. 1 is the plan structure schematic diagram of the present invention；
Fig. 2 be in Fig. 1 A to the cross section structure schematic diagram of arc groove；
Fig. 3 be in Fig. 1 BB to cross section structure schematic diagram.
In figure, 1 protractor, 2 rulers, 3 auxiliary scales, 4 arcuate grooves, 5 vertical bar shaped grooves, 6 arc shaped sliders, 7 plectanes, 8 semicircular plates, 9 circular openwork parts, 10 donuts, 11 connecting rods, 12 draw circular hole.
(5) detailed description of the invention
Accompanying drawing is the specific embodiment of the present invention.nullSuch as Fig. 1、Fig. 2、Shown in Fig. 3，This kind of math teacher multifunctional drawing tool，Including including ruler 2、Plectane 7，Plectane 7 is made into integration by protractor 1 and semicircular plate 8，Circular openwork part 9 is had in the middle of plectane 8，The circular center of circle of openwork part 9 overlaps with the initial point of protractor 1，It is provided with some donuts 10 in circular openwork part 9，The center of circle of these donuts 10 overlaps with the initial point of protractor 1，Wherein minimum annulus can only hold chalk and insert，Donut 10 is connected with protractor 1 by connecting rod 11，The righthand member of protractor 1 is fixing with the left end of ruler 2 to be connected，Preferably it is made into integration，The upper end of ruler 2、Namely there is the initial point of the extended line throughput hornwork 1 on one side of graduation mark，Arcuate groove 4 is had on the arcuate perimeter wall of protractor 1，The cross section of arcuate groove 4 is convex shape，Vertical bar shaped groove 5 is had in the upper end wall of ruler 2，Arcuate groove 4 is connected with vertical bar shaped groove 5，The righthand member of arcuate groove 4 at least extends to downwards bottom vertical bar shaped groove 5，Auxiliary scale 3 it is provided with in vertical bar shaped groove 5，The initial point of the extended line throughput hornwork 1 of the upper end of described auxiliary scale 3，That is when auxiliary scale 3 is positioned at vertical bar shaped groove 5，Their upper endface edge is concordant，The left end of auxiliary scale 3 is provided with arc shaped slider 6，Arc shaped slider 6 is positioned at arcuate groove 4，The center of circle of the arc of arc shaped slider 6 overlaps with the initial point of protractor 1，Auxiliary scale 3 can move in a circle with the initial point of protractor 1；Some picture circular holes 12 it are additionally provided with on ruler 2.
The present invention can draw straight line, angle, the angle of angulation, draw the angle of known angle, draw the circle of differentdiameter, draw bowlder, can be by the present invention by round with drawing with coloured chalk on blackboard, piece of chalk can also be inserted in minimum annulus in as the center of circle, another chalk is placed on the intersection of other donuts and connecting rod, pushes the present invention with another chalk and draw circle；Draw bigger bowlder, then being inserted into by piece of chalk in the annulus of minimum is the center of circle, is inserted in picture circular hole picture circle with another chalk the most permissible.
In addition to technical characteristic described in description, remaining technical characteristic is all known to a person skilled in the art technology.
Claims (1)
 null1. a math teacher multifunctional drawing tool，It is characterized in that: include ruler (2)、Plectane (7)，Described plectane (7) is made into integration by protractor (1) and semicircular plate (8)，Circular openwork part (9) is had in the middle of described plectane (7)，The center of circle of described circular openwork part (9) overlaps with the initial point of protractor (1)，It is provided with some donuts (10) in described circular openwork part (9)，The center of circle of these donuts (10) overlaps with the initial point of protractor (1)，Wherein minimum annulus can only hold chalk and insert，Described donut (10) is connected with protractor (1) by connecting rod (11)，The righthand member of described protractor (1) is fixing with the left end of ruler (2) to be connected，The initial point of extended line throughput hornwork (1) of the upper end of described ruler (2)，Arcuate groove (4) is had on the arcuate perimeter wall of described protractor (1)，The cross section of described arcuate groove (4) is convex shape，Vertical bar shaped groove (5) is had in the upper end wall of described ruler (2)，Described arcuate groove (4) is connected with vertical bar shaped groove (5)，It is provided with auxiliary scale (3) in described vertical bar shaped groove (5)，The initial point of extended line throughput hornwork (1) of the upper end of described auxiliary scale (3)，The left end of described auxiliary scale (3) is provided with arc shaped slider (6)，Described arc shaped slider (6) is positioned at arcuate groove (4)，Described auxiliary scale (3) can move in a circle with the initial point of protractor (1)；Described ruler (2) is provided with some picture circular holes (12).
Priority Applications (1)
Application Number  Priority Date  Filing Date  Title 

CN201510089373.5A CN105984260A (en)  20150227  20150227  Multifunctional drawing tool for mathematics teacher 
Applications Claiming Priority (1)
Application Number  Priority Date  Filing Date  Title 

CN201510089373.5A CN105984260A (en)  20150227  20150227  Multifunctional drawing tool for mathematics teacher 
Publications (1)
Publication Number  Publication Date 

CN105984260A true CN105984260A (en)  20161005 
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Family Applications (1)
Application Number  Title  Priority Date  Filing Date 

CN201510089373.5A Pending CN105984260A (en)  20150227  20150227  Multifunctional drawing tool for mathematics teacher 
Country Status (1)
Country  Link 

CN (1)  CN105984260A (en) 

2015
 20150227 CN CN201510089373.5A patent/CN105984260A/en active Pending
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Legal Events
Date  Code  Title  Description 

C06  Publication  
PB01  Publication  
WD01  Invention patent application deemed withdrawn after publication 
Application publication date: 20161005 

WD01  Invention patent application deemed withdrawn after publication 