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Portable teaching protractor

A protractor, a portable technology, applied in angle/taper measurement gauges, measuring gauges, angle/taper measurement, etc., can solve problems that cannot be used to measure or draw straight lines, occupy a large space, and troublesome angles, etc., to achieve measurement Accurate results, space-saving, simple effect measurement

Pending Publication Date: 2020-02-21
成都济业教学设备有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is to provide a portable teaching angle ruler, which solves the problems of troublesome measurement of angles between 180° and 360° in the prior art, large errors, inability to measure or draw straight lines, and large space occupation

Method used

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Embodiment Construction

[0020] The present invention will be further described below with reference to the accompanying drawings and embodiments, and the mode of the present invention includes but not limited to the following embodiments.

[0021] Such as Figure 1-5 As shown, the portable teaching protractor provided by the present invention,. The present invention comprises an annular protractor main body 1 with an angle scale on the outer peripheral ring, a pointer connecting beam 2 arranged on the inner ring of the protractor main body 1, and an isosceles trapezoidal angle connected to the pointer connecting beam 2. Indicating plate 3, the free end of said pointer connecting beam 2 is located at the center of circle of said protractor main body 1, said angle indicating plate 3 is engraved with an angle indicating line groove 8 on the longitudinal axis, said pointer connecting beam 2 The free end of the angle indicator plate 3 is provided with an outwardly protruding annular embedding lug 4, and ...

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Abstract

The invention discloses a portable teaching protractor. With the portable teaching protractor adopted, the problems of high difficulty and large errors in measuring angles from 180 degrees to 360 degrees, failure to measure or draw straight lines and large size of a protractor in the prior art can be solved. The portable teaching protractor comprises a protractor main body, a pointer connecting beam, an angle indicating plate, an angle indicating cline groove, an annular embedding protruding block, an annular embedding ring, an annular embedding groove, an extension straight ruler, a transition straight ruler, a telescopic straight ruler containing cavity and a telescopic straight ruler; two sides of each of the extension straight ruler, the transition straight ruler and the telescopic straight ruler are provided with extension straight ruler scales, transition straight ruler scales and telescopic straight ruler scales respectively; and the lengths of the extension straight ruler, thetransition straight ruler and the telescopic straight ruler are consistent and are 1.3 times that of the pointer connecting beam. The portable teaching protractor has the advantages of simple structure, scientific and reasonable design and convenience in use. With the portable teaching protractor adopted, the angle ranging from 0 degree to 360 degrees can be measured very conveniently, a measuringresult is accurate, and space can be saved. The portable teaching protractor has the functions of measuring or drawing long straight lines.

Description

technical field [0001] The invention relates to a portable teaching measuring square. Background technique [0002] Protractors are mainly used to measure angles. The existing protractors are generally half-moon-shaped and used to measure angles from 0° to 180°. For the measurement of angles between 180° and 360°, it is necessary to draw a lead line and then repeat it several times. The measurement is obtained by adding the results of multiple measurements, which is not only troublesome to measure, but also needs to be calculated to finally get the degree of the measured angle, which is time-consuming and laborious, and the errors after multiple measurements will be superimposed, so that the measurement results are accurate The accuracy is poor, and the existing protractor cannot be used for measuring or drawing straight lines, and takes up a lot of space. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide a portab...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01B3/56G01B5/24
CPCG01B3/56G01B5/24
Inventor 吴元敏
Owner 成都济业教学设备有限公司
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