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Multifunctional drawing tool

A drawing tool and multi-functional technology, applied in the field of multi-functional drawing tools for teaching, can solve the problems of easy deviation of the center, inconvenient, inconvenient drawing, etc.

Inactive Publication Date: 2009-09-30
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Traditional teaching aids bring a lot of inconvenience to teachers when drawing on the blackboard. For example, when drawing a circle on the blackboard, because the center positioning pin of the traditional compasses is a steel nail, too much force will damage the blackboard, and too little force will easily cause the center to deviate. Teachers It is very inconvenient and requires certain skills to hold the steel nail feet firmly with one hand and turn the compass with the other hand to draw

Method used

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Embodiment Construction

[0013] The structural principle and working principle of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0014] see figure 1 , 2 , a multifunctional drawing tool, including a ruler 1 and a ruler 2 connected by a magnetic central shaft 7 at one end, a slider 4 is arranged on the ruler 1, and a tapered chalk hole 12 is arranged on one side of the slider 4 , Ruler 2 is provided with slide block 5, and one side of slide block 5 is provided with tapered chalk hole 11, is also provided with dial 3 on magnetic central shaft 7, and sucker 8 is provided at the bottom of magnetic central shaft 7. Screws 6 are also arranged on the slider 4 and the slider 5 . Described ruler 1, ruler 2 are engraved with standard scale. The material of described ruler 1, ruler 2 is transparent plexiglass. Described straightedge 1, straightedge 2 ends have the conical threaded hole 9 of vertical direction and the trapezoidal hole 10 of hor...

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Abstract

The invention relates to a multifunctional drawing tool which comprises a ruler 1 and a ruler 2. One end of the ruler 1 is connected with one end of the ruler 2 by a magnetic central shaft 7; a slide block 4 is arranged on the ruler 1; one side of the slide block 4 is provided with a taper hole 12 used for holding a chalk; a slide block 5 is arranged on the ruler 2; one side of the slide block 5 is provided with a taper hole 11 used for holding a chalk; the magnetic central shaft 7 is provided with a dial 3; and the lowest part of the magnetic central shaft 7 is provided with a sucking disc 8. When the multifunctional drawing tool is used, a chalk is firstly cut into a taper shape or a long-flat shape by the end of the ruler and put into the taper hole of the slide block to be clamped fixedly, then the sucking disc is fixedly adsorbed on a blackboard for fixation, and the drawing tool can draw straight lines in any angles, circular arcs in any angle, radius, ellipses, concentric circles, and the like and has the advantages of convenience and accuracy.

Description

technical field [0001] The invention relates to a multifunctional drawing tool for teaching. Background technique [0002] Traditional teaching drawing tools use wooden compasses, 45° right-angle triangles and 60° right-angle triangles, and protractors. [0003] Traditional teaching aids bring a lot of inconvenience to teachers when drawing on the blackboard. For example, when drawing a circle on the blackboard, because the center positioning pin of the traditional compasses is a steel nail, too much force will damage the blackboard, and too little force will easily cause the center to deviate. Teachers It is very inconvenient and requires certain skills to hold the steel nail feet firmly with one hand and turn the compass with the other hand to draw. When drawing a settable, the teacher needs to fix it with one hand and draw a straight line with chalk with the other hand. When the ruler is slightly deflected, the drawn straight line will also be inclined. Contents of the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B43L7/12B43L9/02B43L11/04G01B5/02
Inventor 刘庆立曹巨江姚素芬张勇李薇申雷易舒俊
Owner SHAANXI UNIV OF SCI & TECH
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