A protractor that makes it easy to see the angle being measured.

Abstract

For children who cannot grasp the concept of angle, or who cannot recognize which part is being measured, traditional protractors do not allow them to understand what an angle is or how to measure it. [Solution] By placing a thin, colored plastic sheet over a conventional protractor, aligning the instrument with the central angle of the part to be measured, and moving the measuring part to visualize the change in angle while aligning the colored part, children can understand the concept of angles while simultaneously enabling them to measure them themselves.

Description

Technical Field

[0001] The present invention relates to a protractor that makes it easy for a person whose measurement angle part is difficult to recognize to understand which part is being measured.

Background Art

[0002] A conventional protractor has a simple structure and is convenient in that it can be measured simply by pressing it against a figure.

[0003] However, when teaching children, it was noticed that there are children who cannot understand the concept of angles or cannot understand which parts are being measured from which parts. Many children are also seen calling up memories from the opposite of 180 degrees. For children with low spatial recognition ability, the conventional protractor is just a list of numbers and they don't know how to use it.

Prior Art Documents

Non-Patent Documents

[0004]

Non-Patent Document 1

[0005]

Non-Patent Document 2

Summary of the Invention

Problems to be Solved by the Invention

[0006] The problems to be solved are that children do not have the concept of angles, and even if they have the concept, it is difficult for them to recognize which parts are being measured. In the conventional protractor, even if the protractor is superimposed on the presented figure, there is a problem that the angle part is not understandable to children.

Means for Solving the Problems

[0007] The most important feature of this invention is that it visualizes the measurement area by overlaying a thin, colored plastic plate onto a conventional protractor. [Effects of the Invention]

[0008] This invention offers the advantage of allowing users to intuitively perceive changes in angle and measure angles while operating the device. Furthermore, when a teacher performs the same operation in front of students, the students can perform the same operation on their own desks, enabling them to grasp the concept of angles and potentially enhance their learning in the field of geometry. [Brief explanation of the drawing]

[0009] [Figure 1] Figure 1 shows the top and bottom parts of the main body, which is made up of four layers (with the top and bottom layers being two). To prevent the control section from being at the bottom and to maintain sturdiness, the part below the handle of the opaque control section is made U-shaped, and a similar plastic plate is also attached to the bottom.

[0010] [Figure 2] Figure 2 shows the lower of the two middle panels, which serves as the control unit 1. By moving the control unit upwards, the area to be measured will be indicated by a translucent color plate.

[0011] [Figure 3] Figure 3 shows the upper of the two middle panels, which serves as the control unit 2. By moving the control unit upwards, if you want to measure from the right, that part will be indicated by a translucent color plate of a different color than in Figure 2. Note that it does not matter which of the parts in Figure 2 and Figure 3 is on top; it does not affect the finished product. [Modes for carrying out the invention]

[0012] Embodiments of the present invention will be described below. [Examples]

[0013] The first problem for children to learn angle measurement is to measure angles formed from the horizontal line. Teachers and children who use this product for instruction first place the hinge on the central angle part and position the horizontal line on the boundary between the opaque part (not completely opaque, it's easier to align when slightly visible) and the transparent part as preparation for measurement. Next, move operation part 1 or 2 so that the colors overlap on the presented part of the central angle. Finally, read the angle of the part of the color plate near the handle.

Explanation of Symbols

[0014] 1 The upper half of the lower plate is a conventional transparent protractor 2 Below this line is covered with plastic. · Serves to connect the top and bottom plates. · To prevent pressing down the handle. 3 Upper plate hinge 4 Lower plate hinge 5 Handle (as a universal design) 6 The shaded part is a color plate close to opaque. (If it becomes completely opaque, the baseline for measuring the angle will not be visible.) 7 Transparent part 8 Hinge part 9 Left - hand operation handle (as a universal design) 10 Shaded part semi - transparent color plate (e.g., blue) 11 Hinge part 12 Transparent part 13 Shaded part semi - transparent color plate (a different color from 10, e.g., pink) 14 Right - hand operation handle (as a universal design)

Claims

[Claim 1] To create a cheaper and simpler product, it's possible to modify it so that measurements can only be taken from the left side, eliminate the feature that prevents the handle from being at the bottom, and create the product by simply overlapping two pieces. It's also possible to eliminate the handles in Figures 1, 2, and 3, which were designed with universal design in mind.

Images