CN202986539U - Mathematical tool rule - Google Patents

Mathematical tool rule Download PDF

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Publication number
CN202986539U
CN202986539U CN 201220749120 CN201220749120U CN202986539U CN 202986539 U CN202986539 U CN 202986539U CN 201220749120 CN201220749120 CN 201220749120 CN 201220749120 U CN201220749120 U CN 201220749120U CN 202986539 U CN202986539 U CN 202986539U
Authority
CN
China
Prior art keywords
square
mathematical tool
expansion link
sliding sleeve
tool rule
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
Application number
CN 201220749120
Other languages
Chinese (zh)
Inventor
朱林
Original Assignee
朱林
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 朱林 filed Critical 朱林
Priority to CN 201220749120 priority Critical patent/CN202986539U/en
Application granted granted Critical
Publication of CN202986539U publication Critical patent/CN202986539U/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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Abstract

The utility model discloses a mathematical tool rule which includes a set square (1), a semicircle protractor (2) is connected inside the set square (1), an extensible rod (3) is arranged at the right-angle endpoint of the set square (1) and is connected with the set square (1) through a rotating shaft (4), the top of the extensible rod (3) is provided with a sliding sleeve (5) capable of extending along the extensible sleeve, and chalks (6) can be placed at the top of the sliding sleeve (5). The mathematical tool rule is reasonable and practical in design, ingenious and novel in conception, and easy and convenient to use, enables an arc drawing device to match with the protractor in usage to perform the drawing of angles and straight lines, improves drawing efficiency and accuracy when teachers teach, and is convenient to carry.

Description

A kind of mathematical tool chi
Technical field
The utility model relates to a kind of mathematical tool chi.
Background technology
At present, the teacher particularly drawing tools used in teaching process of mathematics teacher is ruler, set square, protractor, compasses temple, its shortcoming be purposes single, carry inconvenience, and to use respectively, if it is just very inconvenient to measure angle and the picture straight line of large-size, sometimes cause measure error and setting-out error.
Summary of the invention
Technical problem to be solved in the utility model is: a kind of multi-functional mathematical tool chi is provided.
For solving the problems of the technologies described above, the technical solution adopted in the utility model is:
A kind of mathematical tool chi, comprise a set square 1, be connected with semicircular protractor 2 in set square 1, it is characterized in that, be provided with expansion link 3 on the right angle of set square 1 end points, expansion link 3 is connected with set square 1 by rotating shaft 4, and expansion link 3 tops are provided with can be along the flexible sliding sleeve 5 of expansion link, can place chalk 6 on sliding sleeve 5 tops.
The beneficial effects of the utility model are: practicality reasonable in design, and the novelty that is skillfully constructed, easy to use, drawing the arc device can be used in conjunction with protractor, carries out the making of angle straight line, and the utility model has improved mapping efficient and the accuracy rate of teachers ' teaching, easy to carry, very practical.
Description of drawings
Below in conjunction with accompanying drawing, the specific embodiment of the present utility model is described in further detail.
Fig. 1 is structural representation of the present utility model.
In figure, 1 set square, 2 protractors, 3 expansion links, 4 rotating shafts, 5 sliding sleeves, 6 chalks.
The specific embodiment
As shown in Figure 1, a kind of mathematical tool chi, comprise a set square 1, be connected with semicircular protractor 2 in set square 1, it is characterized in that, be provided with expansion link 3 on the right angle of set square 1 end points, expansion link 3 is connected with set square 1 by rotating shaft 4, expansion link 3 tops are provided with can be along the flexible sliding sleeve 5 of expansion link, can place chalk 6 on sliding sleeve 5 tops.

Claims (1)

1. mathematical tool chi, comprise a set square (1), be connected with semicircular protractor (2) in set square (1), it is characterized in that, be provided with expansion link (3) on the right angle end points of set square (1), expansion link (3) is connected with set square (1) by rotating shaft (4), and expansion link (3) top is provided with can be along the flexible sliding sleeve (5) of expansion link, can place chalk (6) on sliding sleeve (5) top.
CN 201220749120 2012-12-15 2012-12-15 Mathematical tool rule Expired - Fee Related CN202986539U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN 201220749120 CN202986539U (en) 2012-12-15 2012-12-15 Mathematical tool rule

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN 201220749120 CN202986539U (en) 2012-12-15 2012-12-15 Mathematical tool rule

Publications (1)

Publication Number Publication Date
CN202986539U true CN202986539U (en) 2013-06-12

Family

ID=48557751

Family Applications (1)

Application Number Title Priority Date Filing Date
CN 201220749120 Expired - Fee Related CN202986539U (en) 2012-12-15 2012-12-15 Mathematical tool rule

Country Status (1)

Country Link
CN (1) CN202986539U (en)

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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 non-payment of annual fee

Granted publication date: 20130612

Termination date: 20131215