Drawing device for middle school mathematical education

Abstract

The invention discloses a drawing device for middle school mathematical education. The drawing device comprises a drawing plate; a step edge is arranged on the back side of the drawing plate; an angular adjusting rod is mounted at the left end of the step edge; a conical coiling drum is mounted inside the bottom of the step edge; a spring is mounted at the right end of the conical coiling drum; aprotractor winds around the surface of the conical coiling drum; the other side of the protractor is fixedly connected onto the angular adjusting rod; a straight line groove is formed in the middle ofthe top surface of the drawing plate and longitudinally penetrates through the drawing plate; a first pen clamp is mounted in the straight line groove and comprises a fastening button; the fasteningbutton is mounted at the top of the straight line groove; a threaded column is in screw connection with the middle of the fastening button; the bottom of the threaded column is connected with a circular-truncated-cone-shaped pen sleeve; the outer ring of the bottom of the pen sleeve is in screw connection with a circular-truncated-cone-shaped limiting piece; a graduated scale is arranged at the front end of the straight line groove; a point adjusting device is arranged at the left end of the straight line groove; an angular rail nail is mounted at the bottom of the point adjusting device; a telescopic pipe with the square section is arranged at the front end of the point adjusting device; and a second pen clamp is arranged at the tail end of the telescopic pipe.

Description

Technical field [0001] The invention relates to the technical field of teaching appliances, in particular to a drawing device for middle school mathematics teaching. Background technique [0002] At present, in mathematics teaching work, because various functional graphics and geometric figures are involved, drawing tools have become indispensable teaching tools for mathematics teachers. Teachers usually carry drawing tools such as rulers, set squares, compasses, and protractors. The problem that arises from this is that traditional teaching drawing tools are independent and inconvenient to carry, and they often require several tools to be used when drawing graphics. It is very inconvenient to carry and use, and traditional drawing tools are often in pursuit of diversity, which makes the volume of drawing tools very large, which is not conducive to carrying and storing. At the same time, larger drawing tools also occupy the area of ​​the teaching table. Summary of the invention ...

AI Technical Summary

Problems solved by technology

Teachers usually carry drawing tools such as rulers, set squares, compasses and protractors. The resulting problems are: traditional teaching drawing tools are independent and inconvenient to carry, and often require several tools to be used together when drawing graphics. It is very inconvenient to carry and use, and the traditional drawing tools often pursue diversity, which makes the drawing tools very large, which is not conducive to carrying and storage. At the same time, the larger drawing tools also occupy the area of ​​the teaching table

Images