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Quincuncial circular arc drawing board

A drawing board and quincunx-shaped technology, applied in the field of drawing tools, can solve the problems of tool limitations, troublesome accuracy, inflexibility, etc., and achieve the effect of avoiding smudges on the drawing surface

Inactive Publication Date: 2013-01-30
迁安市科技发展促进中心 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Drawing involves all aspects of production, scientific research, teaching, equipment manufacturing and maintenance. Although computer drawing is advanced, manual drawing is indispensable. Existing tools are limited and inflexible, especially when drawing arcs, which are cumbersome and have low accuracy.

Method used

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  • Quincuncial circular arc drawing board
  • Quincuncial circular arc drawing board
  • Quincuncial circular arc drawing board

Examples

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Embodiment Construction

[0009] Below in conjunction with accompanying drawing, the present invention will be further described, as Figure 1-Figure 4 As shown, take a regular pentagon on a 1.5-2.5mm thick transparent, anti-brittle, non-deformable plastic board, set 5 groups of semicircular drawing boards symmetrically around the outside of the regular pentagon, remove the pentagon And the part outside the outer semicircle to form a quincunx shape. Further, each semicircle is provided with 5 concentric semicircles with a diameter difference of 10mm and hollowed-out grooves between the top and bottom. The 5 groups have a total of 50 semicircles, and the 10 central semicircles with a diameter of 1-10mm are all hollowed out. Next to the 50 semicircles, mark the millimeters of their respective semicircle diameters with 1-50. The semicircle distribution increases counterclockwise from the inside (the semicircle diameter mantissa within the pentagon is 1, 2, 3, 4, 5) to the outside. (The mantissas of the s...

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Abstract

Disclosed is a quincuncial circular arc drawing board. The quincuncial circular arc drawing board is formed by five groups of symmetrical semicircle drawing boards, an anti-slide cap and an inverted circular cone platform, the five groups of symmetrical semicircle drawing boards are provided with 50 semicircles, each latter semicircle is 1mm smaller than a former semicircle in diameter, diameters and 0 to 360 degree scale and tagged values are arranged on the semicircles, hollow-out grooves with wide upper portion and narrow lower portion are arranged on the outer sides of the semicircles, a coordinate line and a mark hole are disposed on a board body, the anti-slide cap and the inverted circular cone platform are mounted in the middle of the board body, and a small hole with a diameter smaller than 2mm is arranged on the periphery of the platform. The qncuncial circular arc drawing board has the advantages that circular arc drawing is accurate, convenient and rapid, and the problems that the drawing boards objectively slide during drawing and a drawing is smeared when removed from the drawing boards are avoided.

Description

Technical field: [0001] The invention belongs to the field of drawing tools, and relates to a drawing board, in particular to a quincunx-shaped arc drawing board. Background technique: [0002] Drawing involves all aspects of production, scientific research, teaching, equipment manufacturing and maintenance. Although computer drawing is advanced, manual drawing is indispensable. Existing tools are limited and inflexible, especially when drawing arcs, which are cumbersome and have low accuracy. . Invention content: [0003] In order to overcome the above-mentioned deficiencies, the present invention provides a quincunx-shaped arc drawing board, which is realized through the following scheme: on a transparent, brittle and non-deformable plastic board with a thickness of 1.5-2.5mm, surround a positive There are 5 groups of semi-circular drawing boards arranged symmetrically on the outside of the pentagon, and each semi-circle is provided with 5 concentric semi-circles with a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B43L13/00
Inventor 杨春喜
Owner 迁安市科技发展促进中心
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