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Multifunctional ring-shaped protractor for teaching

A protractor, multi-functional technology, applied in the direction of measuring angle/taper gauges, straightedges, measuring gauges, etc., can solve the problems of troublesome angles, large errors, inability to measure or draw, etc., to achieve simple measurement, simple structure, The effect of accurate measurement results

Pending Publication Date: 2020-02-25
成都济业教学设备有限公司
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  • 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 multi-functional annular protractor for teaching, to solve the problems of troublesome measurement of angles between 180° and 360° in the prior art, large errors, and problems that cannot be used for measuring or drawing straight lines

Method used

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  • Multifunctional ring-shaped protractor for teaching
  • Multifunctional ring-shaped protractor for teaching
  • Multifunctional ring-shaped protractor for teaching

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Embodiment Construction

[0018] 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.

[0019] Such as Figure 1-3 As shown, the multi-functional circular protractor for teaching provided by the present invention has a simple structure, a scientific and reasonable design, and is easy to use. It is very convenient to measure an angle of 0°-360°, and the measurement result is accurate, and it has the function of measuring or drawing a straight line. 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 bod...

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Abstract

The invention discloses a multifunctional ring-shaped protractor for teaching. The multifunctional ring-shaped protractor solves the problems that measurement of the angle between 180 degrees and 360degrees in the prior art is troublesome, the error is large, and measuring or drawing of straight lines cannot be realized. The multifunctional ring-shaped protractor comprises a protractor main body,a pointer connecting beam, an angle indicating plate and an angle indicating wire groove. The pointer connecting beam is provided with a ring-shaped engaging protrusion block, the angle indicating plate is provided with a ring-shaped embedded ring and a ring-shaped embedded groove, the angle indicating plate can rotate freely relative to the pointer connecting beam so that the angle indicating wire groove can indicate the angle, the top end of the angle indicating plate is connected with an extended straight ruler integrally formed together with the angle indicating plate, and extended straight ruler scales are arranged on the two sides of the extended straight ruler. The multifunctional ring-shaped protractor is simple in structure, scientific and reasonable in design and convenient to use. Measurement of the angle between 0 degrees and 360 degrees is very convenient to realize, the measurement result is accurate, and the function of measuring or drawing the straight lines is achieved.

Description

technical field [0001] The invention relates to a multifunctional circular protractor for teaching. 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 poor accuracy, and existing protractors cannot be used to measure or draw straight lines. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide a multi-functional circular protractor ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B43L7/12G01B3/56G01B5/24
CPCB43L7/12G01B3/56G01B5/24
Inventor 吴元敏
Owner 成都济业教学设备有限公司
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