CN202685686U  Compass ruler for mathematics teaching  Google Patents
Compass ruler for mathematics teaching Download PDFInfo
 Publication number
 CN202685686U CN202685686U CN 201220361046 CN201220361046U CN202685686U CN 202685686 U CN202685686 U CN 202685686U CN 201220361046 CN201220361046 CN 201220361046 CN 201220361046 U CN201220361046 U CN 201220361046U CN 202685686 U CN202685686 U CN 202685686U
 Authority
 CN
 China
 Prior art keywords
 slide block
 ruler
 chute
 compass
 fixator
 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.)
 Expired  Fee Related
Links
 230000000875 corresponding Effects 0.000 claims description 4
 230000000694 effects Effects 0.000 abstract description 4
 238000000034 method Methods 0.000 description 1
 238000000926 separation method Methods 0.000 description 1
Abstract
The utility model discloses a compass ruler for mathematics teaching. The compass ruler comprises a straight ruler (1), and is characterized in that a chute (2) is formed in the middle of the straight ruler (1); two slide blocks (3) are arranged in the chute (2); a scale pointer (5) is respectively arranged on the upper part of each slide block (3); a telescopic positioning needle (4) is arranged on the lower part of the leftend slide block (3); a chalk holder (6) is arranged on the lower part of the rightend slide block (3); and a fixing device (7) is arranged on a side wall at the right end of each slide block (3) and on a part which corresponds to the chute (2). By adoption of the structure, the effects that the compass ruler is convenient to use and can serve as a straight ruler and the center of a circle can be fixed on a plane are achieved.
Description
Technical field
The utility model relates to a kind of auxiliary mathematics teaching appliance, relates in particular to a kind of compass for math teaching chi.
Background technology
Mathematical education is often used compasses and ruler teaching aid at present, because the two separation and Performance Ratio are more single, needs repeatedly to change the mapping apparatus in the blackboard mapping in the mathematical education process, so not only wastes time and energy, and has wasted valuable instructional blocks of time.
Summary of the invention
The purpose of this utility model provides a kind of simple in structure, and is easy to use, the center of circle can be fixed on the compass for math teaching chi that also can double as ruler on the plane.
The technical solution of the utility model is a kind of compass for math teaching chi, it comprises ruler 1, it is characterized in that: be provided with chute 2 in the centre of described ruler 1, in described chute 2, be provided with two slide blocks 3, be respectively equipped with tuning drive gear 5 on the top of described each slide block 3, be provided with flexible pilot pin 4 in the bottom of described left end slide block 3, be provided with chalk holder 6 in the bottom of described righthand member slide block 3, on the sidewall of described each slide block 3 righthand member and with the corresponding section, position of described chute 2, be respectively equipped with fixator 7.
The technical solution of the utility model can also be that described fixator 7 is comprised of rotating shaft and eccentric disc, and the center of circle that described eccentric disc is passed in described rotating shaft is fixed on the sidewall of described slide block 3.
The beneficial effects of the utility model are to be provided with chute 2 by the centre at described ruler 1, in described chute 2, be provided with two slide blocks 3, be respectively equipped with tuning drive gear 5 on the top of described each slide block 3, be provided with flexible pilot pin 4 in the bottom of described left end slide block 3, be provided with chalk holder 6 in the bottom of described righthand member slide block 3, on the sidewall of described each slide block 3 righthand member and with the corresponding section, position of described chute 2, be respectively equipped with fixator 7, during use, ruler 1 can be used as ruler and makes straight line or oblique line, owing to be provided with chute 2 in the centre of ruler 1, slide block 3 is in chute 2 interior movements, flexible pilot pin 4 on the slide block 3 is fixed on the blackboard, determine the position of chalk holder 6 by the required radius length of tuning drive gear 5 usefulness, pass through again fixedly slide block 3 of fixator 7, just can draw circle around 4 rotations of flexible pilot pin, realize easy to usely, the center of circle can be fixed on the plane and can double as the effect that ruler uses.
Description of drawings
Fig. 1 is structure chart of the present utility model
Among Fig. 11, ruler, 2, chute, 3, slide block, 4, flexible pilot pin, 5, tuning drive gear, 6, chalk holder, 7, fixator.
The specific embodiment
According to Fig. 1, shown in 2, the utility model relates to a kind of compass for math teaching chi, it comprises ruler 1, be provided with chute 2 in the centre of described ruler 1, in described chute 2, be provided with two slide blocks 3, be respectively equipped with tuning drive gear 5 on the top of described each slide block 3, be provided with flexible pilot pin 4 in the bottom of described left end slide block 3, be provided with chalk holder 6 in the bottom of described righthand member slide block 3, on the sidewall of described each slide block 3 righthand member and with the corresponding section, position of described chute 2, be respectively equipped with fixator 7, described fixator 7 is comprised of rotating shaft and eccentric disc, and the center of circle that described eccentric disc is passed in described rotating shaft is fixed on the sidewall of described slide block 3; During use, ruler 1 can be used as ruler and makes straight line or oblique line, owing to be provided with chute 2 in the centre of ruler 1, slide block 3 is in chute 2 interior movements, flexible pilot pin 4 on the slide block 3 is fixed on the blackboard, determine the position of chalk holder 6 by the required radius length of tuning drive gear 5 usefulness, by the rotation of the eccentric disc on the fixator 7 and upper wall or the lower wall tight fit of chute 2 slide block 3 is fixed again, just can draw circle around flexible pilot pin 4 rotations, realized easy to usely, the center of circle can be fixed on the plane and can double as the effect that ruler uses.
Claims (2)
1. compass for math teaching chi, it comprises ruler (1), it is characterized in that: be provided with chute (2) in the centre of described ruler (1), in described chute (2), be provided with two slide blocks (3), be respectively equipped with tuning drive gear (5) on the top of described each slide block (3), be provided with flexible pilot pin (4) in the bottom of described left end slide block (3), be provided with chalk holder (6) in the bottom of described righthand member slide block (3), on the sidewall of described each slide block (3) righthand member and with the corresponding section, position of described chute (2), be respectively equipped with fixator (7).
2. compass for math teaching chi according to claim 1, it is characterized in that: described fixator (7) is comprised of rotating shaft and eccentric disc, and the center of circle that described eccentric disc is passed in described rotating shaft is fixed on the sidewall of described slide block (3).
Priority Applications (1)
Application Number  Priority Date  Filing Date  Title 

CN 201220361046 CN202685686U (en)  20120716  20120716  Compass ruler for mathematics teaching 
Applications Claiming Priority (1)
Application Number  Priority Date  Filing Date  Title 

CN 201220361046 CN202685686U (en)  20120716  20120716  Compass ruler for mathematics teaching 
Publications (1)
Publication Number  Publication Date 

CN202685686U true CN202685686U (en)  20130123 
Family
ID=47541349
Family Applications (1)
Application Number  Title  Priority Date  Filing Date 

CN 201220361046 Expired  Fee Related CN202685686U (en)  20120716  20120716  Compass ruler for mathematics teaching 
Country Status (1)
Country  Link 

CN (1)  CN202685686U (en) 
Cited By (2)
Publication number  Priority date  Publication date  Assignee  Title 

CN105818577A (en) *  20160422  20160803  王立云  Straight ruler with circle drawing function 
CN112248693A (en) *  20201022  20210122  潍坊科技学院  Combined plotter for mathematical education 

2012
 20120716 CN CN 201220361046 patent/CN202685686U/en not_active Expired  Fee Related
Cited By (2)
Publication number  Priority date  Publication date  Assignee  Title 

CN105818577A (en) *  20160422  20160803  王立云  Straight ruler with circle drawing function 
CN112248693A (en) *  20201022  20210122  潍坊科技学院  Combined plotter for mathematical education 
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Legal Events
Date  Code  Title  Description 

C14  Grant of patent or utility model  
GR01  Patent grant  
C17  Cessation of patent right  
CF01  Termination of patent right due to nonpayment of annual fee 
Granted publication date: 20130123 Termination date: 20130716 