JP3104495U - Bamboo dragonfly - Google Patents

Abstract

To provide a bamboo tonbo having a design element which has a stable flight direction, is hardly affected by wind, and can easily determine a drop position.
A plurality of propeller-shaped horizontal blades (12a, 12b, 12c) composed of a pair of blades (11) are superposed and joined at their respective intermediate portions, and the joining angles of the adjacent blades (11) in plan view are determined. A bamboo tonbo 10 which is substantially equally divided and a shaft 14 for rotating the horizontal wing 12 is fixed vertically to the horizontal wing 12 at a portion where a plurality of the horizontal wings 12 are joined. The notch 15 (15a, 15b, 15c) which can fix a middle part and a joining angle is provided in the middle part of each horizontal wing 12 of the part where a plurality of horizontal wings are overlapped. 11 are fitted substantially horizontally when viewed from the front.
[Selection diagram] Fig. 1

Description

  The present invention relates to a bamboo dragonfly of a toy, and more particularly, to a bamboo dragonfly capable of performing a stable straight flight in a pushing direction.

  Conventionally, bamboo tonbo has been widely known as a handmade toy, and its play is performed by two protrusions at the tip which can be inserted into two holes provided in the middle of one propeller-shaped horizontal wing. The horizontal wing detached from the protrusion of the shaft is vertically lifted by the shaft provided with the squeezed between the palms of both hands and pushed out while rotating the shaft, so that the horizontal wing is blown away. Some bamboo tombs have a shaft fixed to the horizontal wing. In this case, the bamboo is flying with the shaft attached to the horizontal wing. As for the direction of rotation of the shaft, in the case of right-handed people, it is usually easy to apply force by pushing out the right hand, so rotate the shaft counterclockwise to obtain lift, The angle has a shape facing upward in the rotation direction. On the other hand, in the case of a left-handed person, the shaft is rotated clockwise by using a blade having an angle opposite to that of the right-handed person so that lift can be obtained.

In a conventional bamboo tonbo, two engaging projections are formed at the tip of one shaft, and a hole is formed at the center of the horizontal wing so that the engaging projection fits at each vertex of a square or at each vertex of a regular hexagon. And a plurality of horizontal wings, each of which is separated and independent, are blown at a time (for example, see Patent Document 1). In addition, in the conventional bamboo tonbo, a string is attached to the lower end of the shaft, and the string is wound around the shaft and stored in a cylindrical body.The bamboo tonbo is pulled while pulling the string from the top of the cylindrical body and rotating the shaft. A device designed to fly far away has been proposed (for example, see Patent Document 2). Furthermore, there has been proposed a conventional bamboo tonbo in which a plurality of horizontal wings are separately engaged with one shaft (see, for example, Patent Document 3).
Japanese Utility Model Publication No. 7-44080 Japanese Utility Model No. 3061729 JP-A-61-48797

However, the conventional bamboo dragonfly as described above still has the following problems to be solved.
(1) A bamboo dragonfly that separates one horizontal wing from its axis and flies it, or flies with one horizontal wing attached to its axis, has an unstable flight direction, is easily affected by wind, and falls anywhere. Do or lack stability. In addition, it is difficult to find the bamboo dragonfly after it falls and enters the grass.
(2) The bamboo tombo, in which a plurality of horizontal wings that are separated and independent from each other, are made to fly at once, the flight direction of each horizontal wing varies at the moment when each horizontal wing jumps off the axis, one by one. Is susceptible to the wind and lacks stability where it falls. In addition, it is difficult to find the bamboo dragonfly after it falls and enters the grass.
(3) A bamboo dragonfly that flies one horizontal wing while rotating the shaft by wrapping a string around the shaft and pulling the shaft inside the cylinder has a stable rotation speed and a stable flight distance. However, the flight direction is unstable and it is susceptible to the wind, and it lacks stability where it falls. In addition, it is difficult to find the bamboo dragonfly after it falls and enters the grass.
(4) A bamboo tombo in which a plurality of horizontal wings are separated from and engaged with one shaft has improved flight direction stability, but has increased resistance, reduced propulsion, and reduced flight distance. .
The present invention has been made in view of such circumstances, and provides a bamboo dragonfly having a design element that has a stable flight direction, is hardly affected by wind, and can easily determine a drop position. Aim.

  The bamboo dragonfly according to the present invention, which meets the above object, is configured such that a plurality of propeller-shaped horizontal blades including a pair of blades are overlapped and joined at their respective intermediate portions, and a joining angle of the adjacent blades in a plan view is substantially equally divided. And a bamboo tongue in which the axis for rotating the horizontal wing is fixed vertically to the horizontal wing at the part where the multiple horizontal wings are joined, and where the multiple horizontal wings are overlapped At the middle part of each horizontal wing, there is a cut-out part at which the middle part and the joint angle can be fixed, and a plurality of horizontal wings are fitted substantially horizontally with all the blades viewed from the front.

Here, the bamboo tonbo preferably has two, three, or four horizontal wings.
Further, the bamboo tonbo preferably has a disk shape in which the shape of the wing has a bulge at the center when viewed in cross section.
Furthermore, in the case of the bamboo tonbo, the total thickness of the intermediate portion after the fitting of a plurality of horizontal wings is equal to the total thickness of the intermediate portion when the horizontal wings before the notches are put on each horizontal wing are overlaid. It is preferable that the depth of the notch is provided in the thickness direction of the middle part of each horizontal wing so as to have a thickness corresponding to 50 to 75%.

  In the bamboo tonbo according to any one of claims 1 to 4 according to claim 1, a plurality of horizontal wings including a pair of blades are overlapped and joined at their intermediate portions, and are adjacent to each other in plan view. A bamboo tonbo in which the joining angle of the fitted blades is approximately equally divided and the axis for rotating the horizontal wing is fixed vertically to the part where the multiple horizontal wings are joined, where the multiple sheets are overlapped In the middle part of each of the horizontal wings, there is a cutout part in which the middle part and the joining angle can be fixed, and a plurality of horizontal wings are fitted substantially horizontally when all of the blades are viewed from the front, so that Since the entire blades of the plurality of horizontal wings are substantially horizontal, the flight direction is stable, flight at all angles such as vertical and horizontal directions is possible, and resistance is reduced and propulsion force can be increased. . Further, since the plurality of horizontal wings are fixed on the axis, the bamboo tonbo itself can land three-dimensionally after dropping, so that it can be easily located and the horizontal wing can be prevented from being lost. Furthermore, it is made of a plurality of horizontal wings, has a beautiful shape, and has a high design value.

In particular, since the bamboo dragonfly according to the second aspect has two, three, or four horizontal wings, a stable flight direction and a strong propulsive force can be obtained.
In particular, since the bamboo tonbo according to the third aspect has a disk shape having a bulge at the center when viewed from a cross section, it is possible to flow the air taken in by the rotation of the blade without causing turbulence. It is possible to obtain a strong propulsive force by reducing air resistance.
Furthermore, in particular, in the bamboo tonbo according to claim 4, the total thickness of the intermediate portion of the plurality of horizontal wings after fitting is such that the horizontal wings before the notches are cut into the respective horizontal wings. Since the depth of the notch is provided in the thickness direction of the middle part of each horizontal wing so as to have a thickness corresponding to 50 to 75% of the total thickness of the middle part, Able to flow air from front to back by reducing turbulence of air when rotating blades without weakening the strength of the joint of the horizontal wings, to obtain a stable flight direction and strong propulsion Can be.

Next, the best mode for embodying the present invention will be described with reference to the attached drawings to provide an understanding of the present invention.
Here, FIGS. 1A and 1B are explanatory diagrams of a bamboo dragonfly according to an embodiment of the present invention, and FIGS. 2A and 2B are explanatory diagrams of a horizontal wing of the bamboo dragonfly, respectively.

A bamboo dragonfly according to an embodiment of the present invention will be described with reference to FIGS. 1A, 1B, 2A, and 2B. Here, FIG. 1 (A) is an explanatory view of a bamboo dragonfly according to an embodiment of the present invention as viewed from above, FIG. 1 (B) is an explanatory view of the bamboo dragonfly as viewed from the front, and FIG. (A) is a plan view of the lower surface side of the upper, middle, and lower horizontal wings when the bamboo tombo has three horizontal wings, and lines AA ', BB', and CC '. FIG. 2B is an enlarged vertical sectional view taken along the line DD ′ of the blade of the bamboo tonbo.
As shown in FIGS. 1A and 1B, a bamboo dragonfly 10 according to an embodiment of the present invention has a plurality of horizontal blades 12 having a propeller-like twist formed of a pair of blades 11, for example, as shown in FIG. In (A) and (B), three horizontal blades 12a, 12b, and 12c (hereinafter, referred to as 12 when the horizontal blades are collectively referred to) constituting the upper stage, the middle stage, and the lower stage are superimposed at their intermediate portions. And are joined by an adhesive or the like. These horizontal blades 12 are substantially equally angled in plan view at the joining angle of the adjacent blades 11. For example, when the horizontal blade 12 includes three horizontal blades 12 a, 12 b, and 12 c, the adjacent blades 11 11 are joined at approximately 60 degrees. A shaft 14 for rotating the horizontal wing 12 is provided with a shaft 14 for rotating the horizontal wing 12 so that all the shaft holes 13 are inserted through one hole in the shaft holes 13 provided at the respective intermediate portions of the horizontal wing 12. Is perpendicularly inserted into the shaft hole 13 and is fixed by bonding with an adhesive or the like.

  As shown in FIG. 2 (A), in the middle part of the horizontal wing 12 of the bamboo dragonfly 10, a notch part 15 which can fix the joining part and the joining angle when they are overlapped, for example, three horizontal Notches 15a, 15b, 15c (hereinafter referred to collectively as notches) are provided at the middle portions of the respective horizontal wings 12a, 12b, 12c where the wings 12a, 12b, 12c are superimposed as an upper stage, a middle stage, and a lower stage. Is 15). These notches 15 have shapes unique to, for example, each of the three horizontal blades 12a, 12b, and 12c, so that the notches 15 can be fitted over the adjacent horizontal blades 12 and fixed in position. I have. The bamboo tonbo 10 is fitted with the notch 15 so that all the blades 11 of the plurality of horizontal wings 12 are substantially horizontal when viewed from the front, and is fitted and attached with an adhesive or the like. . In order to form the bamboo dragonfly 10, the bamboo to be used is usually cut out and harvested, then left in a well-ventilated place for about six months to one year, dried well, and then cut into a propeller-shaped twist. The horizontal wing 12 and the rod-shaped shaft 14 are manufactured. The material for producing the bamboo dragonfly 10 is not limited to bamboo, but may be plastic, and in this case, it can be produced by integral molding. Furthermore, since this bamboo tonbo 10 has a stable flight direction and a strong propulsion force, and at the same time has a three-dimensional landing even after falling in the form of a windmill, the landing position can be found immediately and there is no fear of loss. .

  The number of the horizontal wings 12 for constituting the bamboo dragonfly 10 is preferably two, three, or four. In the conventional bamboo dragonfly having one horizontal wing 12, the flight direction is unstable as described above, and it is susceptible to the wind and lacks stability as to where it falls. It's hard to find once you get in. If the number of horizontal wings 12 is five or more, the weight becomes too heavy, and conversely, it becomes impossible to obtain propulsion. The horizontal wings 12 have substantially the same joining angle between the adjacent blades 11 in plan view. However, when the horizontal wings 12 are composed of two sheets, the horizontal wings 12 have an angle of approximately 90 degrees. Is approximately 60 degrees when three horizontal wings 12 are used, and approximately 45 degrees when four horizontal wings 12 are used. Since the number of the horizontal wings 12 is two, three, or four, the bamboo dragonfly 10 can have a stable flight direction and a strong propulsive force. In particular, when the horizontal wings 12 consist of three sheets, a catch of a bamboo tonbo becomes possible between two persons, and after climbing vertically 20 to 30 m above the ground, descend stably like a parachute. Can be leveraged. In addition, the bamboo tonbo 10 has not only the playability as a toy but also the design of a beautiful shape.

  As shown in FIG. 2 (B), the shape of the blades 11 of the bamboo dragonfly 10 is preferably a disk shape having a bulge at the center in cross section. With this shape, the bamboo dragonfly 10 can reduce the turbulence of the flow of air sucked by the rotation of the blades 11, so that the air resistance can be reduced and the bamboo dragonfly 10 can have a strong propulsive force.

  The total thickness of the intermediate portion, which is the fitting portion after the plurality of horizontal wings 12 are fitted, is determined by comparing the plurality of horizontal wings 12 before the notch 15 is inserted into the middle portion of each horizontal wing 12. Notch having a depth in the thickness direction of the intermediate portion of each horizontal blade 12 so as to have a thickness corresponding to a thin thickness of 50 to 75% of the total thickness of the intermediate portion in the case of being layered. 15 are preferably provided. In the case of a heavy dress with a plurality of horizontal blades 12 superimposed on each other, it is difficult to make all the blades 11 horizontal, and a heavy dress is neglected, ignoring the horizontal alignment of the blades 11. , The sound of cutting the wind is so strong that it cannot get the thrust. On the other hand, when the notches 15 are provided and fitted to the plurality of horizontal blades 12, the blades 11 can be easily leveled and a high propulsion force can be obtained. If the total thickness of the horizontal wings 12 is less than 50% of the total thickness of the horizontal wings 12, the notches 15 provided in the respective horizontal wings 12 become too deep, and the horizontal wings 12 There is a risk of breaking in the middle. If the total thickness when fitted exceeds 75% of the total thickness in the case of heavy fitting, the thickness of the middle portion of the horizontal wing 12 becomes too large and the propulsive force of the bamboo tonbo 10 is reduced.

  The bamboo dragonfly of the present invention has a stable flight direction and accurate landing property at the target place, strong propulsion, flying property to a long distance, easy discovery after landing, diversity of play style, etc. It can be used as a toy that adults can enjoy. In addition, the bamboo tonbo of the present invention has a beautiful shape and a flight curve, and has a design effect.

(A), (B) is an explanatory view of the bamboo tonbo according to one embodiment of the present invention. (A), (B) is explanatory drawing of the horizontal wing of the same bamboo dragonfly, respectively.

Explanation of reference numerals

  10: bamboo tonbo, 11: feather, 12, 12a, 12b, 12c: horizontal wing, 13: shaft hole, 14: shaft, 15, 15a, 15b, 15c: notch

Claims (4)

A plurality of propeller-shaped horizontal blades composed of a pair of blades are overlapped and joined at their respective intermediate portions, and the joining angles of the adjacent blades in plan view are approximately equally divided, and the plurality of horizontal blades are An axis for rotating the horizontal wing in a portion where is joined is a bamboo dragonfly fixed vertically to the horizontal wing,
The intermediate portion of each of the horizontal blades in a portion where a plurality of the horizontal blades are overlapped has a cutout portion in which the intermediate portion and the joining angle can be fixed, and a plurality of the horizontal blades are the blades. A bamboo tonbo which is fitted almost horizontally when viewed from the front.   The bamboo dragonfly according to claim 1, wherein the number of the horizontal wings is two, three, or four.   The bamboo dragonfly according to claim 1 or 2, wherein the shape of the blade is a disk shape having a bulge at a central portion in a cross-sectional view.   The bamboo dragonfly according to any one of claims 1 to 3, wherein a total thickness of the intermediate portion after the plurality of the horizontal wings are fitted is before the notch is inserted into each of the horizontal wings. The notch is formed in the thickness direction of the intermediate portion of each of the horizontal blades so as to have a thickness corresponding to 50 to 75% of the total thickness of the intermediate portion when the horizontal wings are attached. Bamboo dragonfly characterized in that the depth of the part is provided.

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