CN211543060U

CN211543060U - Circle drawing tool

Info

Publication number: CN211543060U
Application number: CN201922203545.3U
Authority: CN
Inventors: 陈诺
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-12-10
Filing date: 2019-12-10
Publication date: 2020-09-22
Anticipated expiration: 2029-12-10

Abstract

The utility model discloses a circle drawing tool, which relates to the field of drawing tools and mainly comprises a bottom plate, a through hole, a pointer and a angle measuring plate, wherein a rectangular through hole with scales is arranged at the middle position of the bottom plate, the pointer is movably arranged on the through hole, the pointer can move left and right along the through hole and is fastened and fixed with the bottom plate to obtain the radius of a circle to be drawn, the semicircular angle measuring plate is hinged on the bottom plate, the bottom edge of the semicircular angle measuring plate is vertical to the through hole, a round hole A is arranged on the angle measuring plate, a round hole B is arranged on the pointer, the semicircular angle measuring plate and the semicircular angle measuring plate are both; after the paintbrushes are respectively inserted into the two round holes, the round holes A on the angle measuring plate are used as centers, and circles can be made by rotating the bottom plate. The utility model has the advantages that: the fixed steel needle foot is changed into a mode of flexibly using a pen, so that the safety of a user is protected, and the drawing attractiveness is improved; can directly draw the arc or angle with corresponding degree; the whole set of tool has multiple functions and can be used as a common ruler; simple and fast use and convenient carrying.

Description

Circle drawing tool

Technical Field

The utility model relates to a field of drawing instrument, concretely relates to circle drawing instrument.

Background

Compasses are used for drawing circles or strings in mathematics and drawing, and are commonly used for drawing rulers and compasses. The traditional compasses tool used by students in daily life has single function, can only be used for drawing circles or arcs, and when the radius of the drawn circle or the central angle of the drawn arc needs to be determined, the compasses need to be used with the help of a ruler, a protractor and the like, are inconvenient to use and carry, and occupy more space. In addition, the fixing foot of the traditional compasses is a steel needle, so that potential safety hazards exist on one hand, and students can cut skin and even threaten life due to improper operation when using the compasses; on the other hand, the steel needle is easy to puncture the paper surface when drawing circles, so that the attractiveness of drawing is affected, and the circle center is difficult to draw.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to overcome the not enough of prior art existence, and provide a circle drawing tool, have and use nimble swift, convenient to carry, the manifold advantage of function.

The purpose of the utility model is accomplished through following technical scheme: the circle drawing tool mainly comprises a bottom plate, a through hole, a pointer and a angle measuring plate, wherein a rectangular through hole with scales is formed in the middle of the bottom plate, the pointer is movably mounted on the through hole, the pointer can move left and right along the through hole and is fastened and fixed with the bottom plate to obtain the radius of a circle to be drawn, the semicircular angle measuring plate is hinged to the bottom plate, the bottom edge of the semicircular angle measuring plate is perpendicular to the through hole, a round hole A is formed in the angle measuring plate, a round hole B is formed in the pointer, the round holes A and the round hole B are used for inserting a painting brush, and the centers of the; after the paintbrushes are respectively inserted into the two round holes, the round holes A on the angle measuring plate are used as centers, and circles can be made by rotating the bottom plate.

Furthermore, the bottom plate is a rectangular transparent plastic plate, and millimeter scales are arranged on the long rectangular edge of the bottom plate, so that the measuring function is realized.

The utility model has the advantages that:

1. the fixed steel needle foot is changed into a mode of flexibly using a pen, so that the safety of a user is protected, and the drawing attractiveness is improved;

2. can directly draw the arc or angle with corresponding degree;

3. the tool is multipurpose and can be used as a common ruler;

4. simple and fast use and convenient carrying.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Description of reference numerals: bottom plate 1, through-hole 2, pointer 3, quantative angle board 4, round hole A5, round hole B6.

Detailed Description

The present invention will be described in detail with reference to the accompanying drawings:

example (b): as shown in the attached drawings, the circle drawing tool mainly comprises a bottom plate 1, a through hole 2, a pointer 3 and a angle measuring plate 4, wherein the rectangular through hole 2 with scales is formed in the middle of the bottom plate 1, the pointer 3 is movably installed on the through hole 2, the pointer 3 can move left and right along the through hole 2 and is fastened and fixed with the bottom plate 1 to obtain the radius of a circle to be drawn, the semicircular angle measuring plate 4 is hinged to the bottom plate 1, the bottom edge of the semicircular angle measuring plate is perpendicular to the through hole 2, a round hole A5 is formed in the angle measuring plate 4, a round hole B6 is formed in the pointer 3, the semicircular angle measuring plate and the semicircular angle measuring plate are used for inserting a painting brush, and the centers; as a preferred technical scheme, the bottom plate 1 is a rectangular transparent plastic plate with the length of 14 cm and the width of 5 cm, and millimeter scales are arranged on the long side of the rectangle of the bottom plate 1, so that the measuring function is realized. The angle measuring plate 4 has the same structure as a commercially available student protractor (made of transparent materials).

The utility model discloses a working process: when drawing, firstly moving the pointer 3 on the scale of the through hole 2 according to the radius of a circle to be drawn, fastening and fixing the pointer with the bottom plate 1, then respectively inserting painting brushes (which can be pencils, ball pens and the like) into the circular hole A5 and the circular hole B6, fixing the two painting brushes with one hand, rotating the bottom plate 1 by taking the circular hole A5 of the angle measuring plate 4 as the center with the other hand, obtaining the circle with the required radius after rotating for one circle, and obtaining the arc of the corresponding central angle by measuring the drawn degrees through the angle measuring plate 4 in the circle drawing process; the degree can be measured by directly using the angle measuring plate 4 for the angle to be measured, and the lengths of various sides, line segments and the like can be measured by utilizing the millimeter scales on the long sides of the rectangle of the bottom plate 1.

It should be understood that equivalent substitutions or changes to the technical solution and the inventive concept of the present invention should be considered to fall within the scope of the appended claims for the skilled person.

Claims

1. A circle tool, characterized in that: the drawing pen mainly comprises a bottom plate (1), a through hole (2), a pointer (3) and a measuring angle plate (4), wherein a rectangular through hole (2) with scales is formed in the middle of the bottom plate (1), the pointer (3) is movably mounted on the through hole (2), the pointer (3) can move left and right along the through hole (2) and is fastened and fixed with the bottom plate (1) to obtain the radius of a circle to be drawn, the semicircular measuring angle plate (4) is hinged to the bottom plate (1), the bottom edge of the semicircular measuring angle plate is perpendicular to the through hole (2), a round hole A (5) is formed in the measuring angle plate (4), a round hole B (6) is formed in the pointer (3), the round holes A (5) and the round hole B (6) are used for inserting a drawing pen, and the centers; after the paintbrushes are respectively inserted into the two round holes (5 and 6), the round holes A (5) on the angle measuring plate (4) are used as centers, and a circle can be made by rotating the bottom plate (1).

2. The cyclograph tool of claim 1, wherein: the bottom plate (1) is a rectangular transparent plastic plate, and millimeter scales are arranged on the rectangular long edge of the bottom plate (1) to realize a measuring function.