JPH08112382A

JPH08112382A - Paper-made boomerang that returns

Info

Publication number: JPH08112382A
Application number: JP29192294A
Authority: JP
Inventors: Yutaka Nishiyama; 豊西山
Original assignee: Individual
Current assignee: Individual
Priority date: 1994-10-18
Filing date: 1994-10-18
Publication date: 1996-05-07

Abstract

PURPOSE: To accurately return the boomerang to the thrower by shifting the center of gravity of the center line of a blade backward and folding the rear edge of the blade at an angle. CONSTITUTION: Three blades 1 are formed of paper in specific directions, and the center lines 2 of the respective blades are shifted backward from the positions of the centers 3 of gravity to obtain backward blades. Then the rear edges of the blades 1 are folded at an angle. Consequently, the track of the boomerang is held horizontal because of the effects of the backward blades and the boomerang returns to the thrower, so that the boomerang can easily be thrown indoors.

Description

【発明の詳細な説明】本発明は、室内で飛ばせる紙製ブーメランに関するもの
である。この発明の特徴は、材質が紙であること、
翼の枚数が３枚であること、室内で飛ばせることであ
り、正確に戻ってくることを保証するものである。従来
のブーメランが、木製であること、翼の枚数が２枚
であること、室外で飛ばすものであったが、本発明は
ジャイロスコープの原理により、ブーメラン遊びの可能
性を大きく切り開いたものである。さらに、本発明の特
徴は、翼の位置にある。図１のように翼の中心線を重心
の位置から後方にずらしている（これを後退翼とい
う）。従来の３枚翼ブーメランは、翼の中心線が重心を
通る線上にある。このために上昇して天井にあたった
り、手前に落ちたりすることが多い。本発明の後退翼の
効果で、ブーメランの軌道は水平軌道を保ち正確に投げ
手の位置に戻ってくる。また、翼の揚力効果を出すため
に、従来は翼にひねりを加えることが主であったが、図
２のように翼の後縁を角状に折り曲げる（山折り）こと
の方が、容易であり正確であることも工夫のひとつであ
る。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a paper boomerang that can be fly indoors. The feature of this invention is that the material is paper,
The fact that there are three wings and the ability to fly indoors guarantees that they will return accurately. Although the conventional boomerang is made of wood, has two wings, and is blown outdoors, the present invention greatly opens up the possibility of boomerang play by the principle of the gyroscope. . Further, a feature of the present invention is the location of the wings. As shown in Fig. 1, the center line of the wing is shifted rearward from the position of the center of gravity (this is called a swept wing). In the conventional three-blade boomerang, the center line of the wing is on the line passing through the center of gravity. For this reason, it often rises and hits the ceiling or falls to the front. Due to the effect of the swept wing of the present invention, the trajectory of the boomerang keeps a horizontal trajectory and returns exactly to the position of the thrower. In addition, in order to obtain the lift effect of the wing, conventionally, the twist was mainly applied to the wing, but it is easier to bend the trailing edge of the wing into a horn (mountain fold) as shown in FIG. It is one of the ideas to be accurate.

[Brief description of drawings]

【図１】本発明の紙製ブーメランの切り取り図1 is a cutaway view of the paper boomerang of the present invention.

【図２】本発明の紙製ブーメランの翼の折り曲げ図FIG. 2 is a fold view of the wings of the paper boomerang of the present invention.

【図３】本発明の紙製ブーメランの投げ方の概略図FIG. 3 is a schematic diagram of how to throw the paper boomerang of the present invention.

[Explanation of symbols]

（１）は翼（２）は翼の中心線（３）は重心
（４）は翼の折り曲げ(1) is the wing (2) is the wing center line (3) is the center of gravity
(4) is the bending of the wings

Claims

[Claims]

1. A paper boomerang that is accurately returned and is formed by displacing the center line of the wing rearward from the position of the center of gravity and bending the trailing edge of the wing into an angular shape.