Precession

Abstract

To provide a precession body in which a force in a twist rotation direction occurs upon receiving wind, which is also called "spiral motion" in which a rotation axis performs a periodic motion.SOLUTION: A precession body includes a body part and a wind-receiving body erected in the body part. In the wind-receiving body, a vector in a twist rotation direction occurs when the wind-receiving body receives wind. The body part performs precession when the vector in the twist rotation direction occurs in the wind-receiving body.SELECTED DRAWING: Figure 1

Description

Technical Field

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[0006]

[0001] The present invention relates to a rotating body that undergoes precession when exposed to wind.

Background Art

[0002] The applicant has previously proposed a bell device that swings when exposed to wind or a slight force and produces sound (Patent Document 1). This technology aims to make the sound - producing body tilt by the force when wind hits the blade - shaped acting body or a slight force is applied, and the internal rolling body rolls to produce sound. Further, a pedestal that can be lightly pushed down with a finger is provided to facilitate the sound - producing body to make a sound.

[0003] As a result of further prototyping and evaluating various forms, the inventor found that depending on conditions such as the wind - receiving body, a movement in the torsional rotation direction occurs, and one can enjoy this change, leading to the present invention.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] An object of the present invention is to provide a precession body that generates a torsional rotation - direction force when exposed to wind and whose rotation axis undergoes a periodic motion, also known as "misosuri motion".

Means for Solving the Problems

[0006] The precession body according to the present invention includes a main body portion and a wind - receiving body erected on the main body portion. The wind - receiving body generates a torsional rotation - direction vector when exposed to wind, and the main body portion undergoes precession when a torsional rotation - direction vector is generated in the wind - receiving body.

[0007] Here, the main body is self-supporting with the wind-receiving body erected. When the wind-receiving body is subjected to wind and tilts slightly, or when it is subjected to a light force and tilts slightly, it becomes clear that the main body has a weighted section at its bottom, and when a restoring force is generated in the direction of self-support for this weighted section, a torsional rotational vector is generated.

[0008] When the wind-receiving body is tilted in this way, the form in which a torsional rotation vector is generated is such that when the wind flows toward the wind-receiving body, the flow changes toward the left and right ends of the wind-receiving body. For example, the wind-receiving body may have surfaces that are inclined to become thinner from the center towards the left and right ends. Furthermore, to make the main body more likely to tilt when wind hits the wind-receiving body, inclined surfaces may be provided on both sides of the wind-receiving body so that they spread downwards from the top. If the wind receiving body has a flat surface, the width W of the wind receiving surface may be equal to or greater than the height H of the wind receiving body. If the wind stops here, the twisting rotation weakens, and it will come to a stationary position on its own.

[0009] In the present invention, it is preferable that the bottom surface of the main body has a convex shape, for example, a spherical shape, in order to induce a torsional rotational force in the main body.

[0010] The precessing body according to the present invention is characterized by its twisting rotation, which is the miso-grinding motion itself. For example, the main body may have a rolling element inside, and when the main body precesses, this rolling element rolls and hits the internal side wall, producing a sound. [Effects of the Invention]

[0011] The precessing body according to the present invention generates a torsional rotation vector when tilted by wind or a light force, allowing the user to enjoy its movement. [Brief explanation of the drawing]

[0012] [Figure 1]An example of a precessing body according to the present invention is shown. The main body is a rotating body, and its cross-sectional view is shown. [Figure 2] The diagram shows the precessional motion caused by wind, and 'd' indicates the ground contact trajectory of the bottom surface of the main body (periodic rotational motion). [Figure 3] Side views of the torsional rotational motion are shown in (a) to (d). [Figure 4] Plane views of the torsional rotational motion are shown in (a) to (d). [Figure 5] A modified version of the wind-receiving body is shown. [Modes for carrying out the invention]

[0013] An example of the configuration of the precession body according to the present invention will be described below with reference to the figures. Figures 1(a) and 3(a) show front views, and Figure 1(a) shows a partial cross-sectional view to explain the interior of the main body. Figure 3(a) shows a plan view, where the wind receiving body 12 is a planar body with a symmetrical front and back, and the main body is a roughly spherical rotating body as a whole.

[0014] A wind-receiving body 12 is detachably attached to the top of the main body 11, which has a convex bottom surface 11a, allowing the entire structure to stand on its own. The air receiving body 12 is made of paper, resin, or fabric. In this embodiment, the main body 11 is approximately spherical in shape, but it is not limited to approximately spherical as long as the bottom surface 11a is convex in shape. Furthermore, the angle of precession can be adjusted by changing the curvature of the convex shape. The bottom of the main body 11 is the weight section 11f, which allows it to stand upright while twisting and rotating. The main body is preferably made of metal.

[0015] In this embodiment, the shaft portion 11c is erected from the upper surface of the weight portion 11f, and a cavity portion 11g is formed around it, and the spherical rolling element 11d is housed in this cavity portion. When the main body 11 is torsionally rotated, the roller 11d rolls on the rolling surface 11b on the upper surface of the heavy part 11f, and when it hits the inside of the side wall part 11e, a sound is made. As a whole, the present invention is characterized by being torsionally rotatable while being self - standing, and the main body 11 does not necessarily have to be in the shape of a bell.

[0016] As shown in the plan view in FIG. 3, the wind - receiving body 12 has an example where the circular wind - receiving surfaces 12A and 12B are folded in two at the upper part and have inclined surfaces that slightly spread out towards the lower connecting part side. As shown in FIG. 1, the size of the wind - receiving body 12 is such that the horizontal width W is equal to or wider than the vertical width H. When the force of the wind f is applied to the wind - receiving body 12, as shown in FIGS. 2 to 4, when the central axis D0 before receiving the wind tilts due to the wind, the central axis tilts as D1 to D3, and the grounding locus d of the bottom surface of the main body 11 rotates in a torsional manner while drawing a circular cycle as shown in FIG. 2. The size of this grounding locus d changes depending on the strength of the wind.

[0017] As shown in FIG. 5, the wind - receiving body 12 may be a decorative body of various shapes such as a butterfly type. As specific examples of the precession body according to the present invention, there are a bell that makes a sound when a roller rolls inside the main body, a ringing bell that strikes the main body with a ringing bar, a mounted wind chime that rotates while twisting by replacing the wind - receiving body with various decorative bodies, a toy that is gently tilted by hand and rotates torsionally and then stands still independently, etc.

Explanation of Reference Numerals

[0018] 11 Main body 11a Bottom surface <​​​​​​​​​​​​​​​

Claims

1. It comprises a main body and a wind receiving body erected on the main body, The aforementioned wind-receiving body generates a torsional rotation vector when it receives wind. The main body precesses when a torsional rotation vector is generated in the wind-receiving body, and the wind-receiving surface of the wind-receiving body has an inclined surface that is thinned from the center to the left and right ends, and / or an inclined surface that is widened from the top downwards.

2. The precession body according to claim 1, characterized in that the main body has a convex shape on its bottom surface.

3. The precessing body according to claim 2, characterized in that the main body has a rolling element inside, and when the main body precesses, it strikes the internal side wall and produces a sound.

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