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Multifunctional teaching sector ruler and compass

A multi-functional, ruler and gauge technology, applied in the field of teaching rulers, can solve the problem of single function of rulers and gauges, and achieve the effect of easy portability and fast drawing speed

Inactive Publication Date: 2008-08-06
马广忠
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to overcome the technical problem of the single function of existing rulers and provide a multifunctional teaching ruler that is easy to carry and can draw straight lines as well as various angles and circles.

Method used

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  • Multifunctional teaching sector ruler and compass

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Embodiment Construction

[0010] The technical scheme of the present invention will be further described below in conjunction with the accompanying drawings.

[0011] As shown in Fig. 1 and Fig. 2, the present invention generally comprises a female ruler 1 and a sub-ruler 4, the section of the female ruler 1 is concave and has a length scale, and one end of the female ruler 1 is provided with a chalk jack 5 , the other end is hinged with a sub-ruler 4 marked with a length scale; the end of the sub-ruler 4 is provided with a compass needle 8, and the body of the sub-ruler 4 is hinged with a strut 2, and the other end of the strut 2 extends into the female In the groove 6 of straightedge 1; For preventing sub-straightedge 4 from sliding in the chute, groove 6 bottom surface is provided with some retaining teeth 7, and each retaining tooth 7 corresponds to a triangular angle and circle radius; Also be provided with extension spring 3 between the ruler body of 4 and female ruler 1, the pulling force of ext...

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Abstract

The invention discloses a multifunction teaching ruler, which is mainly used for teacher picturing on blackboard. The structure of the rule comprises a mother ruler with length graduation and a concave section; a chalk socket is arranged on one end of the mother ruler; a sub-ruler marked with length graduation is articulated with the other end of the mother ruler; a compasses needle is arranged on an end of the sub-ruler; a strut is articulated with a sub-ruler body; the other end of the strut is inserted in the socket of the mother ruler; a plurality of stop pawls are arranged on the bottom of the socket; each stop pawl corresponds to a triangle angle and a circle radius; a tension spring is arranged between the body of the sub-ruler and the mother ruler; a stable triangle structure is formed between the sub-ruler and the mother ruler by the tensile force of the tension spring. The invention has multifunction of painting straight line, triangles with random angle and side length and circle as well as circular arc with random radius directly. The multifunction teaching ruler has the advantages of high speed and standard picturing and convenient carrying, and alters the inconvenience that teachers carry a plurality of picturing teaching aids.

Description

technical field [0001] The invention relates to a ruler for teaching, in particular to a ruler for teachers to draw on a blackboard. Background technique [0002] At present, most of the rulers used by teachers in teaching have single functions. For example, rulers can only draw straight lines, and settables can only draw fixed 30°, 45°, 60° and 90°. To standardize drawing, you need to bring various There are many rulers and gauges, which are inconvenient to carry. And there is no suitable settable for drawing other angles. For example, it is very inconvenient to standardize the illustration of two forces forming an angle of 37°. The existing ruler does not have an angle of 37°. Invention content: [0003] The purpose of the present invention is to overcome the technical problem of the single function of the existing ruler, and provide a multifunctional teaching ruler which is easy to carry and can draw straight lines and various angles and circles. [0004] In order to ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B43L13/00B43L9/04B43L7/10G01B3/06
Inventor 马广忠董海霞
Owner 马广忠
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