CN219083981U - Angle center positioning protractor - Google Patents

Abstract

The utility model relates to the technical field of drawing tools, in particular to an angle center positioning protractor, which comprises a panel, wherein an angle scale line and an angle scale value are arranged on the panel, and one surface of the panel at the center point of the angle scale line is provided with an outwards protruding salient point. According to the angle center positioning protractor, the salient points are arranged at the center points of the angle scales, so that the operation of rotating the protractor by taking the center points of the angle scales as the circle centers is easy to realize, and the measurement and drawing operations are more convenient.

Description

Angle center positioning protractor

Technical Field

The utility model relates to the technical field of drawing tools, in particular to an angle center positioning protractor.

Background

The protractor is a common drawing tool, the general specific lower surface is planar, the purpose of the design is mainly to facilitate movement on a plane, but in actual use, the protractor is mainly used for measuring angles and drawing, and more rotating operation taking the central point of an angle scale as a center of a circle is performed.

Disclosure of Invention

The utility model aims to solve the technical defects and provides the angle center positioning protractor, when the protractor is arranged on a certain plate surface, the position of the center of an angle scale mark relative to the plate surface can be kept unchanged when the protractor is rotated to operate.

The utility model discloses an angle center positioning protractor, which comprises a panel, wherein an angle scale line and an angle scale value are arranged on the panel, and one surface of the panel at the center point of the angle scale line is provided with an outwards protruding salient point. The convex points can be round convex points, hemispherical convex points, conical convex points or other convex points. The bump size is matched with the specific size and the application scene, and too large can cause one side to tilt, uneven placement and too small can cause unstable fixation and easy displacement.

According to the technical scheme, when the angle equivalent device is horizontally placed on the paper, the convex points are tightly contacted with the paper to form a certain fixing effect, and when the angle equivalent device is used for measuring operation, the rotation operation taking the convex points on the panel as the circle centers can be easily realized, so that the positions of the centers of the angle scale marks relative to the paper are kept unchanged. When measuring the angle, the center of the angle scale mark corresponds to the vertex of the angle all the time in the process of rotating the protractor, so that the measuring and drawing operations are simpler and more convenient.

According to the angle centering protractor, the salient points are arranged at the center points of the angle scales, so that the rotation operation taking the center points of the angle scales as the circle centers is easy to realize during measurement and drawing, the measurement and drawing operation is simpler, the use is convenient, and the drawing efficiency is effectively improved.

Drawings

FIG. 1 is a schematic structural diagram of embodiment 1 of the present utility model;

FIG. 2 is a side view of the structure of embodiment 1 of the present utility model;

fig. 3 is a schematic structural diagram of embodiment 2 of the present utility model.

Detailed Description

In order to further describe the technical means and effects adopted by the present utility model for achieving the intended purpose, the following detailed description will refer to the specific implementation, structure, characteristics and effects according to the present utility model with reference to the accompanying drawings and preferred embodiments.

Example 1:

as shown in fig. 1 and 2, the utility model discloses an angle centering protractor, which comprises a panel 1, wherein an angle scale mark 3 and an angle scale value 4 are arranged on the panel 1, and one surface of the panel 1 at the center point 2 of the angle scale mark 3 is provided with an outwards convex salient point 8. Wherein the panel 1 is of semi-circular configuration.

Example 2:

as shown in fig. 3, the utility model discloses an angle centering protractor, which comprises a panel 1, wherein an angle scale mark 3 and an angle scale value 4 are arranged on the panel 1, and one surface of the panel 1 at the center point 2 of the angle scale mark 3 is provided with an outwards convex salient point 8. Wherein the panel 1 is of triangular configuration.

The 0 degree scale mark and the 180 degree scale mark of the angle scale mark 3 are positioned at the edge of the same straight edge of the panel 1. The edge of the straight edge of the panel 1 where the 0 degree scale mark and the 180 degree scale mark of the angle scale mark 3 are arranged is provided with a length scale mark 6 and a length scale value 7, and the 0 scale of the length scale value 7 is positioned at the center of the angle scale mark 3.

The present utility model is not limited to the preferred embodiments, but is capable of modification and variation in detail, and other modifications and variations can be made by those skilled in the art without departing from the scope of the present utility model.

Claims (1)

1. An angle center positioning protractor is characterized in that: the panel comprises a panel, wherein an angle scale line and an angle scale value are arranged on the panel, and one surface of the panel at the center point of the angle scale line is provided with an outwards convex bump.

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