Multifunctional measuring instrument for circle

Abstract

A multifunctional measuring instrument for a circle comprises a first vertical baffle, a concentric-square-shaped measuring ruler, track recording paper and a horizontal baffle. The horizontal baffle plate is fixed below the concentric-square-shaped measuring scale and is flush with the graduated scale line of the concentric-square-shaped measuring scale; the first vertical baffle is arranged on the left side of the lower portion of the concentric-square-shaped measuring ruler and is perpendicular to the concentric-square-shaped measuring ruler. The square plate, the elliptical plate and the circular plate are all thick paperboards, and central circular holes are formed in the centers of the thick paperboards, so that the square plate, the elliptical plate and the circular plate can roll in an area limited by the first vertical baffle, the horizontal baffle and the concentric-square-shaped measuring ruler. Through arrangement of track recording paper, an L-shaped limiting area formed by a first vertical baffle, a horizontal baffle and a concentric-square-shaped measuring ruler, and a square plate, an elliptical plate and a circular plate which are provided with central circular holes, the motion track of the central point of each pattern can be recorded, and what the wheel is circular can be verified; and the diameter of a circle can be rapidly and accurately measured.

Description

Technical Field

[0001] The utility model relates to the field of teaching aids, in particular to a multifunctional circle measuring instrument. Background Art

[0002] A measuring ruler is a commonly used measuring tool, which can be divided into length measuring rulers, angle measuring rulers, diameter measuring rulers, etc. according to different detection contents. Among them, there are some tools for measuring the diameter of a circle in the prior art, but their functions are relatively simple.

[0003] At the same time, in the relevant teaching chapters on circles, teachers often encounter a problem: why is the wheel round and not square or elliptical? There is no teaching aid in the existing technology that can clearly demonstrate this principle and can be used to measure the diameter of a circle; therefore, we need to design a multifunctional circle measuring instrument to achieve better teaching results. Utility Model Content

[0004] The purpose of the utility model is to provide a multifunctional circle measuring instrument, aiming to overcome the defects of the prior art and solve the problem that the existing teaching aids cannot demonstrate the principle of why wheels are round.

[0005] To this end, the utility model proposes a multifunctional circle measuring instrument, comprising a vertical baffle, a circular measuring ruler, a track recording paper, a square plate, an elliptical plate, a circular plate and a horizontal baffle; the circular measuring ruler is horizontally extended, and a scale is provided on its upper end surface; the horizontal baffle is fixed at a rear position below the circular measuring ruler, and the front end surface of the horizontal baffle is flush with the scale marking line of the circular measuring ruler; the vertical baffle is arranged at a left position below the circular measuring ruler, and the vertical baffle is arranged perpendicular to the circular measuring ruler, and the track recording paper is laid flat under the horizontal baffle and the vertical baffle; the square plate, the elliptical plate and the circular plate are all thick cardboard, and a central circular hole is provided at the center position of each plate, so that the square plate, the elliptical plate and the circular plate can roll within the area defined by the vertical baffle, the horizontal baffle and the circular measuring ruler.

[0006] As a preferred technical solution of the present application, the square plate, the elliptical plate and the circular plate have the same thickness.

[0007] As a preferred technical solution of the present application, the thickness of the vertical baffle is the same as the thickness of the circular plate.

[0008] As a preferred technical solution of the present application, the thickness of the horizontal baffle is also the same as the thickness of the circular plate.

[0009] As a preferred technical solution of the present application, the middle position of the circular measuring ruler is a transparent window.

[0010] As a preferred technical solution of the present application, the rear boundary of the transparent window is flush with the scale markings.

[0011] As a preferred technical solution of the present application, the multifunctional measuring instrument further includes a plurality of regular polygonal plates, wherein a central circular hole is provided at the center position of each regular polygonal plate.

[0012] As a preferred technical solution of the present application, the regular polygonal plate includes: a regular triangle, a regular pentagon, a regular hexagon, a regular heptagon, and a regular octagon.

[0013] As a preferred technical solution of the present application, it further includes a second vertical baffle, which is a movable component arranged below the circular measuring ruler, and the second vertical baffle is arranged perpendicular to the circular measuring ruler.

[0014] The multifunctional circle measuring instrument provided by the utility model can record the motion trajectory of the center point of each figure and verify why the wheel is circular by providing a trajectory recording paper and an L-shaped limited area formed by a vertical baffle plate 1, a horizontal baffle plate, and a circular measuring ruler, as well as a square plate, an elliptical plate, and a circular plate with a central circular hole. At the same time, by providing a vertical baffle plate 2 and a circular measuring ruler, the diameter of a circle can be measured quickly and accurately.

[0015] In addition to the above-described purposes, features and advantages, the present application also has other purposes, features and advantages. The present application will be further described in detail below with reference to the drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The drawings that constitute part of this application are used to provide a further understanding of this application. The illustrative embodiments of this application and their descriptions are used to explain this application and do not constitute an improper limitation on this application. In the drawings:

[0017] Figure 1 This is a schematic structural diagram of the multifunctional circle measuring instrument of the present invention;

[0018] Figure 2 This is a structural diagram of a baffle in the multifunctional circle measuring instrument of the present invention;

[0019] Figure 3 A diagram showing the motion trajectory of the center point of a square in the multifunctional circle measuring instrument of the present invention;

[0020] Figure 4 A diagram showing the motion trajectory of the center point of an ellipse in the multifunctional circle measuring instrument of the present invention;

[0021] Figure 5 A motion trajectory diagram of the center point of a circle in the multifunctional circle measuring instrument of the present invention;

[0022] Figure 6 This is a schematic diagram of measuring the diameter of a circle in the multifunctional circle measuring instrument of the present invention;

[0023] Explanation of the accompanying symbols: 1. Vertical baffle 1; 2. Measuring ruler; 3. Vertical baffle 2; 4. Track recording paper; 5. Square plate; 6. Elliptical plate; 7. Circular plate; 8. Multi-segment arc track; 9. Wavy line track; 10. Horizontal straight line track; 11. Horizontal baffle; 12. Center circular hole; 21. Scale; 22. Transparent window. DETAILED DESCRIPTION

[0024] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments in this application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0025] like Figures 1 to 6 As shown, the multifunctional circle measuring instrument of the present invention includes a vertical baffle 1, a circular measuring ruler 2, a track recording paper 4, a square plate 5, an elliptical plate 6, a circular plate 7, and a horizontal baffle 11; wherein the circular measuring ruler 2 is horizontally extended and has a scale 21 on its upper end surface; the horizontal baffle 11 is fixed to the lower rear side of the circular measuring ruler 2, and the front end surface of the horizontal baffle 11 is flush with the scale 21 marking of the circular measuring ruler 2; the vertical baffle 1 is set to the left side below the circular measuring ruler 2 and is arranged perpendicular to the circular measuring ruler 2; the track recording paper 4 is laid flat below the horizontal baffle 11 and the vertical baffle 1.

[0026] In addition, the square plate 5, the oval plate 6, and the circular plate 7 are all made of thick cardboard, and a central circular hole 12 is provided at the center thereof. At the same time, the square plate 5, the oval plate 6, and the circular plate 7 have the same thickness. At the same time, the thickness of the vertical baffle 1 is the same as the thickness of the circular plate 7; the thickness of the horizontal baffle 11 is also the same as the thickness of the circular plate 7, so that the square plate 5, the oval plate 6, and the circular plate 7 can roll within the L-shaped limited area formed by the vertical baffle 1, the horizontal baffle 11, and the circular measuring ruler 2.

[0027] When the experimenter places the square plate 5 in the area defined by the vertical baffle 1, the horizontal baffle 11, and the circular measuring ruler 2, and passes a ballpoint pen through the central circular hole 12 of the square plate 5 to contact the track recording paper 4, the track recorded by the track recording paper 4 during the rolling of the square plate 5 to the right is a multi-segment arc track 8. The multi-segment arc track 8 is composed of multiple circular arcs, which have large front-to-back floating and large turning points at the multiple arc connection points; therefore, the stability and balance of the square plate 5 during the rolling process are very poor, and it is not suitable as a wheel.

[0028] When the experimenter places the elliptical plate 6 in the area defined by the vertical baffle 1, the horizontal baffle 11, and the circular measuring ruler 2, and passes a ballpoint pen through the central circular hole 12 of the elliptical plate 6 to contact the track recording paper 4, the track recorded on the track recording paper 4 during the rolling of the elliptical plate 6 to the right is a wavy track 9. Although the wavy track 9 is smooth, it still has a large front-to-back floating. Therefore, the stability and balance of the elliptical plate 6 during the rolling process are relatively poor, and it is not suitable as a wheel.

[0029] When the experimenter places the circular plate 7 in the area defined by the vertical baffle 1, the horizontal baffle 11, and the circular measuring ruler 2, and passes a ballpoint pen through the central circular hole 12 of the circular plate 7 to contact the track recording paper 4, the track recorded on the track recording paper 4 is a horizontal straight track 10 during the rolling of the circular plate 7 to the right. The horizontal straight track 10 does not float in the front and back directions. Therefore, the stability and balance of the circular plate 7 during the rolling process are very good, and it is suitable as a wheel.

[0030] In this solution, a transparent window 22 is provided in the middle of the circular measuring ruler 2. The rear edge of the transparent window 22 is flush with the markings on the scale 21. Through the transparent window 22, it is possible to observe whether the outer contours of the square plate 5, the elliptical plate 6, and the circular plate 7 are flush with the markings on the scale 21 during movement, thereby reducing errors.

[0031] The multifunctional circle measuring instrument of the present invention also includes a vertical baffle 2 3, which is a movable component arranged below the circular measuring ruler 2, and the vertical baffle 2 3 is arranged perpendicular to the circular measuring ruler 2. At the same time, the vertical baffle 2 3 has the same thickness as the circular plate 7, and the vertical baffle 2 3 can move within the area defined by the vertical baffle 1 1, the horizontal baffle 11, and the circular measuring ruler 2.

[0032] When the experimenter places the circular plate 7 in the area defined by the vertical baffle 1, the horizontal baffle 11, and the circular measuring ruler 2, and the bottom quadrant point of the circular plate 7 contacts the horizontal baffle 11, and then moves the vertical baffle 2 3 to the left so that the vertical baffle 2 3 contacts the circular plate 7, the diameter of the circular plate 7 can be easily obtained by observing the size of the scale 21 corresponding to the edge line of the vertical baffle 2 3.

[0033] In another embodiment, the multifunctional circle measuring instrument of the present invention may also include a variety of regular polygonal plates, such as a regular triangle, a regular pentagon, a regular hexagon, a regular heptagon, and a regular octagon, and a center circular hole is provided at the center position of the regular polygonal plate. By rolling the regular polygonal plate, the motion trajectory of its center circle point can be drawn, and its stability during the rolling process can be judged.

[0034] The above description is merely a preferred embodiment of the present application and is not intended to limit the present application. Various modifications and variations are possible for those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present application shall be included within the scope of protection of the present application.

Claims

1. A multifunctional circle measuring instrument, characterized in that: It includes a vertical baffle (1), a circular measuring ruler (2), a track recording paper (4), a square plate (5), an elliptical plate (6), a circular plate (7) and a horizontal baffle (11); The circular measuring ruler (2) is horizontally extended, and a scale (21) is provided on its upper end surface. The horizontal baffle (11) is fixed at a rear position below the circular measuring ruler (2), and the front end surface of the horizontal baffle (11) is flush with the scale (21) marking line of the circular measuring ruler (2). The vertical baffle (1) is arranged at a left position below the circular measuring ruler (2), and the vertical baffle (1) is arranged perpendicular to the circular measuring ruler (2). The track recording paper (4) is laid flat below the horizontal baffle (11) and the vertical baffle (1). The square plate (5), the elliptical plate (6), and the circular plate (7) are all made of thick cardboard, and a central circular hole (12) is provided at the center thereof, so that the square plate (5), the elliptical plate (6), and the circular plate (7) can roll within the area defined by the vertical baffle (1), the horizontal baffle (11), and the circular measuring ruler (2).

2. The multifunctional circle measuring instrument according to claim 1, characterized in that: The square plate (5), the elliptical plate (6), and the circular plate (7) have the same thickness.

3. The multifunctional circle measuring instrument according to claim 2, characterized in that: The thickness of the vertical baffle 1 (1) is the same as the thickness of the circular plate (7).

4. The multifunctional circle measuring instrument according to claim 2, characterized in that: The thickness of the horizontal baffle (11) is also the same as the thickness of the circular plate (7).

5. The multifunctional circle measuring instrument according to claim 1, characterized in that: The middle position of the circular measuring ruler (2) is a transparent window (22).

6. The multifunctional circle measuring instrument according to claim 5, characterized in that: The rear boundary of the transparent window (22) is flush with the marking line of the scale (21).

7. The multifunctional circle measuring instrument according to claim 1, characterized in that: The multifunctional measuring instrument further comprises a plurality of regular polygonal plates, wherein a central circular hole (12) is provided at the center of each regular polygonal plate.

8. The multifunctional circle measuring instrument according to claim 7, characterized in that: The regular polygonal plates include: regular triangles, regular pentagons, regular hexagons, regular heptagons, and regular octagons.

9. The multifunctional circle measuring instrument according to claim 1, characterized in that: It also includes a second vertical baffle (3), which is a movable component arranged below the circular measuring ruler (2), and the second vertical baffle (3) is arranged vertically to the circular measuring ruler (2).

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