CN204414942U - Mathematical education drawing tool - Google Patents

Mathematical education drawing tool Download PDF

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Publication number
CN204414942U
CN204414942U CN201520017919.1U CN201520017919U CN204414942U CN 204414942 U CN204414942 U CN 204414942U CN 201520017919 U CN201520017919 U CN 201520017919U CN 204414942 U CN204414942 U CN 204414942U
Authority
CN
China
Prior art keywords
chalk
barrel
compasses
chalk barrel
compass foot
Prior art date
Application number
CN201520017919.1U
Other languages
Chinese (zh)
Inventor
吴琼
Original Assignee
吴琼
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by 吴琼 filed Critical 吴琼
Priority to CN201520017919.1U priority Critical patent/CN204414942U/en
Application granted granted Critical
Publication of CN204414942U publication Critical patent/CN204414942U/en

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Abstract

The utility model belongs to teaching aid technical field, particularly a kind of mathematical education drawing tool.This mathematical education drawing tool comprises protractor and compasses, it is characterized in that: described compasses are connected to protractor upper end by rotating shaft, compasses comprise the first compass foot and the second compass foot, first compass foot tip is fixed with chalk barrel, some chalks are arranged with in yi word pattern in chalk barrel, and the chalk be positioned at foremost stretches out chalk barrel outside, second compass foot top is provided with apical branch bar, telescopic advance lever is provided with between apical branch bar and chalk barrel, the sidewall of the open end of chalk barrel is inlaid with dead ring, in dead ring, outer both sides stretch out in the inwall of chalk barrel respectively, outer wall.Structure is simple, easy to use; All kinds of teaching apparatus for mathematics is gathered together, ruler need not be changed back and forth during use, improve efficiency of teaching; Chalk is frangibility not, saves resource.

Description

Mathematical education drawing tool
(1) technical field
The utility model relates to a kind of mathematical education drawing tool, belongs to teaching aid technical field.
(2) background technology
Math teacher is given lessons in process often needs mapping, when use amount hornwork carries out the measurement of angle and draws, student is often made clearly not observe, especially the student sat in the back row, have impact on the study of student like this, and the drawing appliance that math teacher uses class hour has ruler and protractor etc. a lot, the function singleness of these instruments, the common educational compasses general structure can drawn on blackboard is larger, the mode of clamping chalk is adopted to map, its single clamping easily causes fractureing of chalk, change chalk is also cumbersome thing simultaneously.
(3) summary of the invention
The utility model, in order to make up the defect of prior art, provides a kind of structure simple, easy to use and be convenient to the mathematical education drawing tool drawing and change chalk.
The utility model is achieved by the following technical solution:
A kind of mathematical education drawing tool, comprise protractor and compasses, it is characterized in that: described compasses are connected to protractor upper end by rotating shaft, compasses comprise the first compass foot and the second compass foot, first compass foot tip is fixed with chalk barrel, some chalks are arranged with in yi word pattern in chalk barrel, and the chalk be positioned at foremost stretches out chalk barrel outside, second compass foot top is provided with apical branch bar, telescopic advance lever is provided with between apical branch bar and chalk barrel, the sidewall of the open end of chalk barrel is inlaid with dead ring, in dead ring, outer both sides stretch out in the inwall of chalk barrel respectively, outer wall.
Wherein:
The outer wall of the chalk barrel at described dead ring place is fixed with binding thread cylinder, regulate dead ring to the degree of tightness power of chalk by binding thread cylinder, can be as required, regulate the length of the chalk section of stretching out foremost, make chalk not frangibility, change chalk also more direct simultaneously, operate also more convenient.
Described protractor is provided with leg-of-mutton hollow out, can draw various triangle, easy to use.
The utility model is realized by following operation principle: protractor is connected with compasses by the utility model, compass foot can be worked as ruler and be used, all kinds of teaching apparatus for mathematics is gathered together, ruler need not be changed back and forth during use, improve efficiency of teaching, regulate dead ring to the degree of tightness power of chalk by binding thread cylinder, as required, the length of the chalk section of stretching out foremost can be regulated, makes chalk not frangibility, change chalk also more direct simultaneously, operate also more convenient.
The beneficial effects of the utility model are: structure is simple, easy to use; All kinds of teaching apparatus for mathematics is gathered together, ruler need not be changed back and forth during use, improve efficiency of teaching; Chalk is frangibility not, saves resource.
(4) accompanying drawing explanation
Below in conjunction with accompanying drawing, the utility model is further described.
Accompanying drawing 1 is the utility model structural representation.
In figure: 1, protractor; 2, compasses; 3, rotating shaft; 4, the first compass foot; 5, the second compass foot; 6, chalk barrel; 7, chalk; 8, apical branch bar; 9, telescopic advance lever; 10, dead ring; 11, binding thread cylinder; 12, hollow out.
(5) detailed description of the invention
Accompanying drawing is specific embodiment of the utility model.
The utility model mathematical education drawing tool as shown in Figure 1, comprise protractor 1 and compasses 2, described compasses 2 are connected to protractor 1 upper end by rotating shaft 3, compasses 2 comprise the first compass foot 4 and the second compass foot 5, first compass foot 4 tip is fixed with chalk barrel 6, some chalks 7 are arranged with in yi word pattern in chalk barrel 6, and the chalk 7 be positioned at foremost stretches out chalk barrel 6 outside, second compass foot 5 top is provided with apical branch bar 8, telescopic advance lever 9 is provided with between apical branch bar 8 and chalk barrel 6, the sidewall of the open end of chalk barrel 6 is inlaid with dead ring 10, in dead ring 10, outer both sides stretch out in the inwall of chalk barrel 6 respectively, outer wall, the outer wall of the chalk barrel 6 at dead ring 10 place is fixed with binding thread cylinder 11, protractor 1 is provided with leg-of-mutton hollow out 12, various triangle can be drawn, easy to use.
Protractor 1 is connected with compasses 2 by the utility model, compasses 2 pin can be worked as ruler and be used, all kinds of teaching apparatus for mathematics is gathered together, ruler need not be changed back and forth during use, improve efficiency of teaching, the degree of tightness power of dead ring 10 pairs of chalks 7 is regulated by binding thread cylinder 11, as required, the length of chalk 7 section of stretching out foremost can be regulated, makes chalk 7 not frangibility, change chalk 7 also more direct simultaneously, operate also more convenient.

Claims (3)

1. a mathematical education drawing tool, comprise protractor (1) and compasses (2), it is characterized in that: described compasses (2) are connected to protractor (1) upper end by rotating shaft (3), compasses (2) comprise the first compass foot (4) and the second compass foot (5), first compass foot (4) tip is fixed with chalk barrel (6), some chalks (7) are arranged with in yi word pattern in chalk barrel (6), and the chalk (7) be positioned at foremost stretches out chalk barrel (6) outside, second compass foot (5) top is provided with apical branch bar (8), telescopic advance lever (9) is provided with between apical branch bar (8) and chalk barrel (6), the sidewall of the open end of chalk barrel (6) is inlaid with dead ring (10), in dead ring (10), outer both sides stretch out in the inwall of chalk barrel (6) respectively, outer wall.
2. mathematical education drawing tool according to claim 1, the outer wall that it is characterized in that the chalk barrel (6) at described dead ring (10) place is fixed with binding thread cylinder (11).
3. mathematical education drawing tool according to claim 1, is characterized in that described protractor (1) is provided with leg-of-mutton hollow out (12).
CN201520017919.1U 2015-01-12 2015-01-12 Mathematical education drawing tool CN204414942U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201520017919.1U CN204414942U (en) 2015-01-12 2015-01-12 Mathematical education drawing tool

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201520017919.1U CN204414942U (en) 2015-01-12 2015-01-12 Mathematical education drawing tool

Publications (1)

Publication Number Publication Date
CN204414942U true CN204414942U (en) 2015-06-24

Family

ID=53465342

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201520017919.1U CN204414942U (en) 2015-01-12 2015-01-12 Mathematical education drawing tool

Country Status (1)

Country Link
CN (1) CN204414942U (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107358839A (en) * 2017-08-31 2017-11-17 林广华 It is a kind of to be provided with the picture-drawing device for changing chalk
CN108773235A (en) * 2018-06-14 2018-11-09 黄永怀 A kind of combined type mathematical education drawing instrument

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107358839A (en) * 2017-08-31 2017-11-17 林广华 It is a kind of to be provided with the picture-drawing device for changing chalk
CN108773235A (en) * 2018-06-14 2018-11-09 黄永怀 A kind of combined type mathematical education drawing instrument

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Legal Events

Date Code Title Description
GR01 Patent grant
C14 Grant of patent or utility model
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20150624

Termination date: 20160112