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Ruler capable of being used for drawing circles

A ruler and circle-drawing technology, applied in the field of teaching aids, can solve the problems of inconvenient carrying, waste of classroom time, cumbersome operation, etc., and achieve the effect of easy portability, low cost, and guaranteed drawing effect

Inactive Publication Date: 2012-05-09
喻继浩
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] In the current known technology, a ruler is used to draw a straight line, and a compass is used to draw a circle, and the two cannot be replaced.
When teachers teach, they need to use ruler and compass at the same time, which is inconvenient to carry. When drawing a circle in class, they must first use the compass to measure the required radius on the ruler before drawing the circle. The operation is cumbersome and wastes class time

Method used

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  • Ruler capable of being used for drawing circles
  • Ruler capable of being used for drawing circles

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Embodiment Construction

[0008] The present invention will be further described below in conjunction with accompanying drawing.

[0009] Such as figure 1 As shown, the present invention comprises a ruler 3, a length scale 2 marked on the ruler 3, a positioning rod 1 installed at the "0" scale, a track groove 4 provided on the ruler 3, and a mobile device installed in the track groove 4 Ring 6, chalk 5 is installed in the mobile ring 6. Ruler 3 total length 75cm-100cm. The track groove 4 is parallel to the scale surface of the ruler 3. Positioning rod 1 is used as the center of circle, and positioning rod 1 generally adopts bolt, screw or tapered rod, preferably tapered rod, and its tip is positioned at the same side of ruler 3 as locking bolt. Locking bolts are installed on the moving ring 6, and the locking bolts and the moving ring 6 are respectively located at both sides of the ruler 3, so that the moving ring 6 can translate along the track groove 4 and fix the position of the chalk.

[0010] ...

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PUM

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Abstract

The invention relates to a ruler capable of being used for drawing circles, which belongs to the field of teaching aids and comprises a ruler body, length graduations, a positioning rod, a track groove, a movable collar and a locking bolt. The length graduations are marked on the ruler body, the positioning rod is mounted at the 'zero' graduation, the track groove is arranged on the ruler body, the movable collar is mounted in the track groove, the locking bolt is mounted on the movable collar, and a chalk is mounted in the movable collar. The ruler capable of being used for drawing circles has the advantages that a drawing function of a conventional ruler and a drawing function of compasses are integrated, drawing steps are simplified, and the ruler is low in cost, convenient in use and applicable to classroom teaching.

Description

technical field [0001] The invention relates to a ruler, in particular to a ruler capable of drawing circles, and belongs to the field of teaching appliances. Background technique [0002] In the present known technology, a ruler is used to draw a straight line, and a compass is used to draw a circle, and the two cannot be substituted. When teaching, teachers need to use ruler and compasses at the same time, which is inconvenient to carry. When drawing a circle in class, they must first use a compass to measure the required radius on the ruler before drawing a circle. The operation is cumbersome and wastes class time. Contents of the invention [0003] Aiming at the above existing problems, the present invention provides a straightedge capable of drawing circles, which integrates the two drawing functions of a straightedge and a compass, and is equipped with a fixed-length device to directly determine the radius, which simplifies the steps of drawing a circle and is easy t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B43L7/00B43L9/00
Inventor 喻继浩
Owner 喻继浩
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