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Protractor

A technology of protractors and scales, applied in the field of protractors, can solve the problems of protractors such as short service life, erasure, and difficulty in use, so as to facilitate work and study, reduce wear, and achieve good results

Inactive Publication Date: 2015-03-18
余昊
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although it is very convenient, it also has its disadvantages in many cases. For example, it is difficult to continue to use it in cloudy days or when the light is very dark; for example, the scale on the protractor used by most people is painted on the outside. So easy to be erased during use
Therefore, the generally used protractor has a short service life.

Method used

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  • Protractor

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Embodiment Construction

[0010] Such as figure 1 A protractor includes a protractor body 1, and a scale 2 is arranged on the lower part of the protractor body 1; the scales on the protractor body 1 and the scale 2 are grooved. When in use, a scale 2 is added to the bottom edge of the protractor body 1, that is, the bottom edge of the protractor is combined with the non-scale side of the scale, so that the angle measuring function of the protractor and the function of measuring the length of the scale are combined. Perfectly put together. Moreover, the groove-shaped ink marking method is used, that is, each scale has a concave rectangular small groove, and the ink marks are marked in this groove, which effectively reduces the wear and tear during use. Even more gratifying is the use of fluorescent ink, which can still be used under relatively poor conditions, which greatly facilitates work and study.

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Abstract

The invention discloses a protractor and belongs to the field of school supplies. According to the protractor, the aims of facilitation for use and diversified functions are achieved. The technical scheme is that the protractor comprises a protractor body, wherein a graduated scale is arranged at the lower part of the protractor body; scales on the protractor and the graduated scale are of groove types; during use, the graduated scale is added on the bottom side of the protractor body, i.e., the bottom side of the protractor is combined with one side, where no scales are formed, of the graduated scale, so that the angle measuring function of the protractor and the length measuring function of the graduated scale are perfectly combined together; in addition, a grooved ink marking method is used, i.e., an inward-concave rectangular small groove is formed in each scale, and ink is marked in the grooves, so that the wear in the use process is effectively reduced; the more gratifying thing is that fluorescent ink is used and can be still used under the condition of relatively poor conditions, so working and learning are greatly facilitated. The protractor has the advantages of simple designing structure, good effect and easiness of popularization.

Description

technical field [0001] The invention belongs to the field of school supplies, and in particular relates to a protractor. Background technique [0002] There are already many types of protractors on the market, mainly plastics, metals, electronics and the like. Although it is very convenient, it also has its disadvantages in many cases. For example, it is difficult to continue to use it in cloudy days or when the light is very dark; for example, the scale on the protractor used by most people is painted on the outside. So it is easy to be wiped off during use. Therefore, the protractors generally used do not have a long service life. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide a protractor to achieve the purpose of easy use and diversified functions. [0004] In order to solve the above-mentioned technical problems, the technical solution adopted in the present invention is: a protractor, comprising a protr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01B3/56G01B3/04
Inventor 余昊
Owner 余昊