CN109203788A

CN109203788A - A kind of multiduty mathematics teaching aid

Info

Publication number: CN109203788A
Application number: CN201711202941.3A
Authority: CN
Inventors: 张坤浪
Original assignee: Individual
Current assignee: Individual
Priority date: 2017-11-27
Filing date: 2017-11-27
Publication date: 2019-01-15

Abstract

A kind of multiduty mathematics teaching aid, it is made of ruler (1), the ruler (2) with protractor pointer and the ruler (3) with calipers function with semicircle protractor, wherein one end of the ruler (1) has semicircular protractor (1-2), installs a suitable screw rod (1-3) in the center apart from 5 centimetres or so of another port；The ruler (2) overlaps on first ruler (1), and against the vertex of protractor (1-2), the ruler (3) is overlapped on second ruler (2)；It integrates the multiple functions such as folding ruler, compasses, protractor, set square, can effectively solve variety of problems brought by many defects of the teaching aids such as conventional teaching set square, compasses, protractor.

Description

A kind of multiduty mathematics teaching aid

Technical field

The present invention is a kind of multiduty teaching apparatus for mathematics, and it is more that it collects folding ruler, compasses, protractor, set square etc. Kind function can effectively solve brought kind of many defects of the teaching aids such as traditional set square, compasses, protractor in one Kind problem.

Background technique

In mathematical education, teacher will often use ruler, protractor, compasses and set square of various shapes.And it is traditional Protractor can often have some difficulties when measuring the degree at angle, such as: some angles cannot be measured directly, need extended line It could be measured after section, the problems such as dihedral can not be measured；Traditional teaching set square is also fixed shape, can not be demonstrated Quickly draw triangle of different shapes；Traditional compasses for teaching is mostly to do center of circle pilot pin with the iron needle of sharp, difficult Exempt from the accident hurted sb.'s feelings, and first to measure the radius length of drawn circle, it is very time-consuming.

Summary of the invention

The object of the invention is to the deficiencies in order to overcome the prior art, thus provide one kind can effectively solve it is above-mentioned many The novel mathematical teaching aid of problem.

The technical solution adopted by the present invention to solve the technical problems is: using transparent organic plastic or other hard materials first The ruler that size, thickness, length is suitable of material production one, and one end has semicircular protractor wherein, apart from another The center that 5 centimetres or so of port is installed by one suitable screw rod；Then second ruler is overlapped on first ruler, and right The vertex of protractor, the circular hole of a suitable size is drilled out with electric drill, suitable screw rod is inserted in the hole and screws on nut, and The angle indicator of protractor is made on the circular hole side of second ruler；Then ruler is overlapped into second ruler by third On, the circular hole of a suitable size is bored apart from 3-5 centimetres of endpoint of center in one end far from protractor vertex, by suitable spiral shell Bar, which inserts in the hole, screws on nut, and the center of ruler is milled out 1 centimetre or so a wide slot as the shape of triangle in third Shape locating slot, trough rim indicate length mark；Finally ruler is coupled with second ruler in third the port center of one end with by force Center of circle pilot pin of one piece of strong magnets as compasses on power gluing, and in the shape localization slot of triangle wedge one can before The chalk sleeve for pushing and pulling running fix afterwards, for being inserted into drawing with coloured chalk circle.

The beneficial effects of the present invention are: multi-purpose content, can effectively solve the religion such as conventional teaching set square, compasses, protractor Variety of problems brought by many defects of tool.

Detailed description of the invention

Fig. 1 is the structural diagram of the present invention.

Specific embodiment

Specific embodiment to facilitate the understanding of the present invention, is stated now in conjunction with Figure of description: first with transparent The ruler (1-1) that organic plastics or other hard materials production one are suitable for size, thickness, length, and one end has wherein Semicircular protractor (1-2) installs a suitable screw rod as triangle in the center apart from 5 centimetres or so of another port Shape localization bar (1-3)；Then the second ruler (2-1) of similar (1-1) is overlapped on first ruler (1-1), and Against the vertex of protractor, the circular hole of a suitable size is drilled out with electric drill, suitable screw rod (2-2) is inserted in the hole and screws on spiral shell Mother makes the angle indicator (2-3) of protractor on the circular hole side of second ruler；It then will be similar to the third handle of (1-1) Ruler (3-1) overlaps on second ruler (2-1), in one end far from protractor vertex apart from 3-5 centimetres of endpoint of center Suitable screw rod (3-2) is inserted in the hole and screws on nut by the circular hole for boring a suitable size, and in third ruler (3-1) Center mills out shape localization slot (3-3) of 1 centimetre or so the wide slot as triangle, and trough rim indicates length mark.Finally Seccotine is used to affix one piece of strong magnets as circle in the port center that third couples using ruler (3-1) with second ruler one end The center of circle pilot pin (3-4) of rule, and wedging one can front and back push-and-pull move positioning in the shape localization slot (3-3) of triangle Chalk sleeve (3-5), for being inserted into drawing with coloured chalk circle.

Application method

This is a changeable ruler, and when overlapping is short ruler, can become after expansion in, long ruler；It is a function The powerful deformation protractor of energy, according to the equal mathematical principle of vertical angles, it can help us to facilitate a variety of different shapes of measurement Angle, and without extending line segment, if ruler (1-1) and (2-1) close to two faces at angle when measurement dihedral, this Traditional protractor can not be measured；It is one " ten thousand become set square " again, third root ruler (3-1) is pulled open, by triangle Shape localization slot (3-3) is put into the shape localization bar (1-3) of triangle, changes the shape localization bar (1-3) of triangle three Position in angular shape localization slot (3-3), it is just at qualified " ten thousand become triangle "；It or one flat circle Center of circle pilot pin (3-4) is directed at the center of circle, is inserted into chalk chalk sleeve (3-5) is inner by rule, needed for around the center of circle, rotation can be drawn Circle come.

Claims

1. a kind of multiduty mathematics teaching aid, by ruler (1), the ruler with protractor pointer with semicircle protractor (2) it is constituted with the ruler with calipers function (3), it is characterised in that: wherein one end of the ruler (1) has semicircular amount Angle device (1-2) installs a suitable shape localization of the screw rod as triangle in the center apart from 5 centimetres or so of another port Bar (1-3).

2. multipurpose mathematics teaching aid according to claim 1, it is characterized in that the ruler (2) overlaps on ruler (1), and Against the vertex of protractor (1-2), the circular hole of a suitable size is drilled out with electric drill, suitable screw rod (2-2) is inserted in the hole Nut is screwed on, and makes the angle indicator (2-3) of protractor on the side of its circular hole.

3. multipurpose mathematics teaching aid according to claim 1, it is characterized in that the ruler (3) overlaps on ruler (2), One end far from protractor vertex bores the circular hole of a suitable size apart from 3-5 centimetres of endpoint of center, by suitable screw rod (3- 2) it inserts in the hole and screws on nut, and mill out 1 centimetre or so a wide slot as the shape of triangle in the center of ruler (3) and determine Position slot (3-3), trough rim indicates length mark, and the port center for coupling with ruler (2) one end affixes one piece of strength with seccotine Center of circle pilot pin (3-4) of the magnet as compasses, and in the shape localization slot (3-3) of triangle wedging one can front and back push away The chalk sleeve (3-5) for drawing running fix, for being inserted into drawing with coloured chalk circle.