TW201838692A - Shuttlecock - Google Patents

Abstract

The present invention is a shuttlecock provided with a base part and a skirt part provided to an end surface of the base part, wherein the skirt part has: a plurality of feather shafts that are placed side by side in an annular shape on the end surface, one end in the axial direction of each of the feather shafts being fixed to the end surface; and a plurality of ribs that connect adjacent feather shafts to each other. All of the ribs in a range between a predetermined position and the other end of the feather shafts are provided obliquely to the feather shafts.

Description

   Badminton   

The present invention relates to a badminton.

Among badminton used in badminton, there are a person using a feather of a water bird (natural feather) as a feather (natural badminton), and a person using artificial feather (artificial badminton) artificially made of nylon resin or the like.

In addition, it is well-known that artificial badminton may be a person who imitates natural feathers, or a wing portion (hereinafter, referred to as a ball skirt portion) is formed into a cross-lattice shape. However, on such artificial badminton, it is impossible to obtain a flight trajectory similar to that of natural badminton. For example, one of the reasons is that the speed of flight is lower than that of natural badminton.

Therefore, for example, in Patent Document 1, in a grid-like artificial badminton, the opening rate of the ball skirt can be changed in accordance with the position in the circumferential direction, thereby increasing the rotation speed.

    [Previous Technical Literature]         [Patent Literature]    

[Patent Document 1] Patent No. 4392454

However, in the above badminton, the weight becomes heavy or the aerodynamic characteristics deteriorate, which may deteriorate the flight distance or deceleration characteristics, and may reduce the design. As a result, it may adversely affect the characteristics other than the speed.

The present invention has been made in view of the above circumstances, and an object thereof is to achieve an increase in rotation speed without affecting other characteristics.

The main invention used to achieve the above-mentioned object is a badminton, which includes: a base; and a skirt provided on an end surface of the base. The ball skirt has a plurality of feather shafts, which are arranged side by side on the end surface in an annular manner, so that one end of the axial direction is respectively fixed on the end surface; and a plurality of ribs, so that adjacent feather shafts are connected to each other. The ribs in a range between a predetermined position of the feather shaft and the other end are all inclined with respect to the feather shaft.

Other features of the present invention can be clearly understood from the description of the specification and drawings.

If the badminton of the present invention is used, the rotation speed during flight can be improved.

1‧‧‧ badminton

2‧‧‧ base

2A‧‧‧face

10‧‧‧ Ball skirt

11‧‧‧feather shaft

12, 12A, 12B, 12B ’, 12C‧‧‧ transverse ribs (ribs)

13, 14‧‧‧ longitudinal ribs

100‧‧‧ Badminton

110‧‧‧ Ball skirt

111‧‧‧feather shaft

112, 112A, 112B‧‧‧ Lateral ribs

113‧‧‧ longitudinal ribs

H1‧‧‧The first feather part

H2‧‧‧The second feather part

H11‧‧‧The first feather part

H12‧‧‧The second feather part

C‧‧‧point

FIG. 1 is a side view showing a shuttlecock 1 according to this embodiment.

Fig. 2 is a perspective view showing the shuttlecock 1 as seen from the front.

Fig. 3 is a perspective view showing the shuttlecock 1 as viewed from the rear.

FIG. 4 is a front view showing the shuttlecock 1 as viewed from the front.

FIG. 5 is a side view of a badminton 100 showing a comparative example.

FIG. 6 is a perspective view showing the shuttlecock 100 as viewed from the front.

FIG. 7 is a perspective view showing the shuttlecock 100 as viewed from the rear.

FIG. 8 is a front view showing the shuttlecock 100 as viewed from the front.

Fig. 9 is a side view showing the shuttlecock 1 of the third embodiment.

Fig. 10 is a side view showing the shuttlecock 1 of the fourth embodiment.

Fig. 11 is a perspective view showing the shuttlecock 1 of the fourth embodiment as viewed from the front.

Fig. 12 is a perspective view showing the shuttlecock 1 of the fourth embodiment as viewed from the rear.

Fig. 13 is a front view showing the shuttlecock 1 of the fourth embodiment as viewed from the front.

(Summary)

According to the description in this manual and the drawings, at least the following matters can be made clear.

It is clearly known that a badminton has: a base portion; and a ball skirt provided on an end surface of the base portion. The ball skirt has: a plurality of feather shafts, which are arranged side by side on the end surface in a ring shape, so that one end in the axial direction is respectively fixed to the end surface; and a plurality of ribs, so that adjacent feather shafts are connected to each other. The ribs in a range between a predetermined position of the feather shaft and the other end are all inclined with respect to the feather shaft.

With such a badminton, it is possible to achieve an increase in the rotational speed during flight.

In such a badminton, it is preferable to use the ribs in this range to stagger side by side in the circumferential direction of the ball skirt to form a first feather portion and a second feather portion smaller than the opening ratio of the first feather portion.

With such a badminton, the speed can be further increased.

Such a badminton is preferably such that the nth (n is a natural number) the raised ribs are counted from the other end in the area on one side of the circumferential direction of the ball skirt with respect to the feather shaft; and The feather shaft is connected to the axial direction of the feather shaft at different positions from the other end in the area on the other side of the circumferential direction from the other end.

With such a shuttlecock, the rotation speed can be increased, and damage can be suppressed.

Such a badminton is preferably connected through the feather shaft to the n-th rib in the area on one side and the rib other than the n-th area in the other side.

With such a badminton, the strength can be improved and the productivity of the mold can be improved.

Such a badminton is preferably arranged on the one end side with a width greater than that of each of the ribs on the one end side compared to the range, and is set to be inclined with respect to the feather shaft.

With such a shuttlecock, it can be easily recognized that the ribs are inclined relative to the feather shaft, and the rotation speed is further increased.

In such a badminton, it is preferable that the convex rib closest to the base part is orthogonal to the feather axis.

With such a badminton, weight reduction can be achieved, and each feather shaft cannot be easily twisted.

In such a badminton, the predetermined position is preferably the midpoint of the feather shaft.

If such a badminton is used, the speed can be increased.

(Implementation form)

<Badminton Structure of This Embodiment>

Hereinafter, the structure of the shuttlecock 1 according to this embodiment will be described with reference to the drawings. In the following description, the front side refers to the side on which the base portion 2 of the shuttlecock 1 is provided, and the rear side refers to the opposite side. FIG. 1 is a side view showing a shuttlecock 1 according to this embodiment. Fig. 2 is a perspective view showing the shuttlecock 1 as seen from the front. Fig. 3 is a perspective view showing the shuttlecock 1 as viewed from the rear. FIG. 4 is a front view showing the shuttlecock 1 as viewed from the front.

The badminton 1 is an artificial badminton, which includes: a base portion 2 and a ball skirt portion 10.

The base part 2 is formed by covering a cork stand with a thin skin, for example. The base portion 2 has a hemispherical shape with a diameter of 25mm to 28mm at the front side, and a flat end surface 2A at the rear end. Moreover, in this embodiment, the cork stopper of the base part 2 is not a natural cork stopper, but a cork stopper formed by hardening the cork particles is used.

The ball skirt 10 is formed of plastic (for example, nylon resin) and is provided so as to expand rearward (to make the diameter larger) from the end surface 2A of the base portion 2. The ball skirt 10 of this embodiment includes a feather shaft 11, a lateral convex rib 12 (equivalent to a convex rib), a longitudinal convex rib 13 and a longitudinal convex rib 14.

The feather shaft 11 is a linear member constituting the ball skirt 10. The feather shaft 11 includes a plurality of feather shafts (16 in the present embodiment), and is provided so as to be arranged side by side on the end surface 2A of the base portion 2 in a ring shape. These feather shafts 11 respectively fix the axially front side end (equivalent to one end thereof) to the end surface 2A of the base portion 2 and move away from (in other words, closer to the rear end) the base portion 2 (end surface 2A). Make each other wider.

The transverse ribs 12 are connected to the positions of the feather shafts 11 adjacent to each other. In this embodiment, the lateral ribs 12 include a lateral rib 12A, a lateral rib 12B, and a lateral rib 12C.

The plurality of lateral ribs 12A are provided on the rear end (equivalent to the other end) side of the axial center point (point C shown in FIG. 1) of the feather shaft 11. In other words, the plurality of lateral ribs 12A are provided in a range between the midpoint and the rear end of the feather shaft 11. The plurality of lateral ribs 12A are provided side by side in the axial direction of the feather shaft 11. In addition, as shown in FIGS. 1 to 4 (especially FIG. 1), the plurality of lateral convex ribs 12A are all inclined with respect to the feather shaft 11. When the badminton 1 is flying, since the part located on the rear side of the point C of the ball skirt part 10 is particularly difficult to contact with the air, as shown in the present embodiment, a plurality of lateral protrusions are made relative to the feather shaft 11 The rib 12A is set to be inclined, and it is easy to rotate the shuttlecock 1 during flight. Thereby, the rotation speed can be increased (refer to the embodiment described later). In addition, since the lateral ribs 12A are inclined with respect to the feather shaft 11, the nth (n is a natural number) lateral ribs 12A are discontinuous from each other in the region where the feather shaft 11 is clamped. . For example, with respect to the central feather shaft 11 in FIG. 1, let the lateral ribs 12A on the rearmost side (the first from the rear end) of the area on the right side (one side in the circumferential direction) of the area on the left side of the area (the other side in the circumferential direction) The lateral lateral ribs 12A on the rearmost side of the region are connected to different positions in the axial direction of the feather shaft 11. However, the lateral ribs 12A on the rearmost side of the region on the right side of the figure are connected to the third lateral ribs 12A from the rear end of the region on the left side of the figure. In this way, the lateral ribs 12A are preferably connected through the feather shaft 11. Thereby, the strength can be improved, and the productivity of the mold can be improved.

In addition, the lateral ribs 12A of this embodiment are not limited to be disposed on the rear side of the midpoint of the feather shaft 11, and the lateral ribs 12A may be disposed on the front side of the midpoint. Specifically, from the rear end count to the range of about 2/3 of the length of the feather shaft 11, by using a plurality of lateral convex ribs 12A, the rotation speed can be increased.

The transverse ribs 12B are provided at positions closer to the base portion 2 than the plurality of transverse ribs 12A (more forward than the point C). The lateral ribs 12B are also inclined with respect to the feather shaft 11 similarly to the lateral ribs 12A. The lateral ribs 12B are formed to be larger than the lateral ribs 12A. With this, it is possible to emphasize (easily identify) the tilt with respect to the feather shaft 11 and further increase the rotation speed.

The lateral ribs 12C are disposed closest to the base portion 2 (that is, the lateral ribs 12A and the lateral ribs 12B are more forward than the plurality of lateral ribs 12A and 12B). The lateral ribs 12C are provided so as to be orthogonal to the feather shaft 11. That is, as shown in FIG. 4, the lateral convex ribs 12C are formed in a ring shape, are orthogonal to the feather shaft 11, and are connected to the feather shaft 11. Thereby, compared with the case where the lateral convex rib 12C is inclined, since the rib length can be shortened, weight reduction can be achieved. In addition, the rigidity of the shuttlecock 1 can be further improved, and the feather shafts 11 are not easily twisted.

The longitudinal ribs 13 are connected between adjacent feather shafts 11 (for example, at an intermediate position), and are arranged substantially parallel to the feather shafts 11. The longitudinal ribs 13 are provided so as to intersect the plurality of lateral ribs 12A.

The longitudinal ribs 14 are connected between the adjacent lateral ribs 12A, and a plurality of longitudinal ribs 14 are provided so as to intersect with the lateral ribs 12A (in this embodiment, two ribs).

In addition, the first feather portion H1 and the second feather portion H2 are formed in the ball skirt portion 10 by the above-mentioned respective ribs.

The first feather portion H1 is composed of a feather shaft 11, a plurality of ribs 12A, and a longitudinal rib 13.

In addition to the structure of the first feather portion H1, the second feather portion H2 is also provided with a structure of the longitudinal ribs 14. In other words, the second feather portion H2 is a region having a larger number of ribs (a region having a higher density of the ribs) than the first feather portion H1. In other words, the opening ratio of the second feather portion H2 is smaller than that of the first feather portion H1.

The first feather portion H1 and the second feather portion H2 are arranged side by side in a staggered manner in the circumferential direction of the ball skirt portion 10. The boundary (boundary) between the first feather portion H1 and the second feather portion H2 is located between the feather shaft 11 and the adjacent feather shaft 11 (longitudinal ribs 13). By forming such a densely feathered area in the ball skirt 10, the rotation speed can be increased compared to the case where the overall structure is the same (when the opening ratio is the same).

In the outer shape of the ball skirt 10 (as shown in FIG. 4), the boundary of the longitudinal ribs 13 is located at the bottom of the valley recessed toward the center axis side (inside) of the shuttlecock 1 and the boundary of the feather shaft 11. It is located on the top of the mountain protruding outward. In addition, for the shape of the rear end of the ball skirt 10 (see FIG. 1), the boundary of the feather shaft 11 is formed on the side of the base portion 2 as a valley bottom (the opposite side to the circumferential direction is the top of the mountain), adjacent to each other. Between the feather shafts 11 (the position of the longitudinal ribs 13 and the like) on the side of the base portion 2 there is no portion where a valley is formed. In this case, since the stress can be dispersed, durability can be improved.

<Example>

The ball skirt 10 of the badminton 1 according to this embodiment is produced by a 3D printer, and the rotation speed is measured. In addition, a conventional structure in which the shape of the ball skirt portion is made into a grid shape (ball skirt portion 110 of badminton 100 described later) is used as a comparative example, and the rotation speed is compared with this embodiment.

<Structure of Comparative Example of Badminton 100>

The badminton 100 of the comparative example will be described with reference to the drawings. Here, similarly, the front side refers to the side on which the base portion 2 is provided, and the rear side refers to the opposite side.

FIG. 5 is a side view of a badminton 100 showing a comparative example. FIG. 6 is a perspective view showing the shuttlecock 100 as viewed from the front. FIG. 7 is a perspective view showing the shuttlecock 100 as viewed from the rear. FIG. 8 is a front view showing the shuttlecock 100 as viewed from the front.

The badminton 100 of the comparative example includes a base portion 2 and a ball skirt portion 110. Since the base portion 2 is the same as the aforementioned embodiment, the description is omitted.

The ball skirt 110 of the comparative example includes a feather shaft 111, a lateral rib 112, and a longitudinal rib 113.

The feather shaft 111 is the same as the feather shaft 11 of this embodiment (badminton 1), and has a plurality of feather shafts (16 in this embodiment). . Each of these feather shafts 111 fixes the front side end in the axial direction to the end surface 2A of the base portion 2 and widens the interval between them as they move away from the base portion 2 (end surface 2A).

The transverse ribs 112 are connected to the adjacent parts of the feather shafts 111 adjacent to each other. In this embodiment, the transverse ribs 112 have a plurality of transverse ribs 112A and a transverse rib 112B. Among them, the plurality of transverse ribs 112A are arranged at the rear end side of the feather shaft 111 in the axial direction; The protruding ribs 112B are provided closer to the base portion 2 than the plurality of lateral protruding ribs 112A.

The longitudinal ribs 13 are arranged between the adjacent feather shafts 111. The plurality of longitudinal ribs 113 are each orthogonal to the plurality of lateral ribs 112A. In addition, the plurality of vertical ribs 113 and the plurality of horizontal ribs 112A are alternately formed into a cross-shaped lattice shape.

With these ribs, the first feather portion H11 and the second feather portion H12 are formed in the badminton 110 of the comparative example. The second feather portion H12 is a region in which the longitudinal ribs 113 are arranged more (that is, at a narrow interval) than the first feather portion H11, and the density of the ribs is a larger area. In other words, the opening ratio of the second feather portion H12 is smaller than that of the first feather portion H11.

The first feather portion H11 and the second feather portion H12 are arranged side by side in a staggered manner in the circumferential direction of the ball skirt portion 110. The boundary (boundary) between the first feather portion H11 and the second feather portion H12 is between the feather shaft 111 and the adjacent feather shaft 111 (longitudinal rib 113).

In the outer shape of the ball skirt 110 of the comparative example (as shown in FIG. 8), the boundary between the adjacent feather shafts 111 (longitudinal ribs 113) is located on the side of the central axis of the shuttlecock 100 (inside). ) The bottom of the depressed valley, the boundary of the feather axis 111, is located on the top of the mountain protruding outward. In addition, for the shape of the rear end of the ball skirt 110 (see FIG. 5), the boundary between the adjacent feather shafts 111 is the bottom of the valley recessed to the side of the base 2 and the boundary of the feather shaft 111 is The top of the mountain protruding from the far side (rear end) of the base 2.

That is, in the case of the badminton 100 of the comparative example, the boundary between the adjacent feather shafts 111 is the valley (side) on the base 2 side, and the center axis side (inside) of the badminton 100 is For the valley. In this case, the stress is concentrated on the part, and it is easy to break. In addition, although a notch is placed at the end (rear end) of the ball skirt 110 to further adjust the sparse area ratio, even in this case, stress will be concentrated on the notch portion and further easily damaged. If the rear end portion of the ball skirt portion 110 is damaged or scattered due to the damage, the purposeful function (the function of increasing the rotation speed) will still be lost.

In contrast, in the badminton 1 of this embodiment, as mentioned above, the boundary between the first feather portion H1 and the second feather portion H2 is located on the top of the mountain (feather shaft 11) protruding outward, and this portion is at the base 2 is flanked by valleys. In other words, between adjacent feather shafts 11 (such as the position of the longitudinal ribs 13), a valley is not formed on the side of the base portion 2, as shown in FIG. 1, when viewed from the side, the lateral ribs 12A The adjacent feather shafts 11 are connected linearly in the oblique direction. Therefore, as mentioned above, in the area where the feather shaft 11 is held, the nth (n is a natural number) lateral ribs 12A from the rear end are not connected to each other. With such a structure, it is possible to suppress stress from being concentrated on the portion between the adjacent feather shafts 11, and it is possible to achieve less breakage (damage suppression) than the badminton 100 of the comparative example.

<Structure of Badminton 1 of the Example>

As an example, the following badminton 1 of Examples 1 to 4 was produced.

Embodiment 1 is shown in badminton 1 shown in FIGS. 1 to 4.

The second embodiment is a second feather portion H2 of the shuttlecock 1 of the first embodiment, and an extra longitudinal rib 14 is formed (refer to the second feather portion H2 of FIG. 9). That is, the difference between the opening ratios of the first feather portion H1 and the second feather portion H2 is larger than that in the first embodiment.

The third embodiment is the badminton 1 of the second embodiment, and the shape of the lateral ribs 12B is changed.

Fig. 9 is a side view showing the shuttlecock 1 of the third embodiment. In Embodiment 3, compared with FIG. 1, one more longitudinal rib 14 (Embodiment 2) is formed, and lateral ribs 12B 'are formed at the same time. The lateral ribs 12B 'are attached to the rear side of the lateral ribs 12B, and constitute a diaphragm having an increased width curve as it moves away from the base 2.

The fourth embodiment is based on the first feather portion H1 and the second feather portion H2 of the shuttlecock 1 of the third embodiment (shown in FIG. 9), and each has a convex rib (vertical convex rib 14).

Fig. 10 is a side view showing the shuttlecock 1 of the fourth embodiment. Fig. 11 is a perspective view showing the shuttlecock 1 of the fourth embodiment as viewed from the front. Fig. 12 is a perspective view showing the shuttlecock 1 of the fourth embodiment as viewed from the rear. Fig. 13 is a front view showing the shuttlecock 1 of the fourth embodiment as viewed from the front.

<Measurement method of rotation speed>

For the measurement of rotation speed, the front side of each badminton is directed to the vertical lower side, and then the rotation speed when the badminton floats when it encounters a wind with a wind speed of 5-10m / s is measured from below. In addition, the rotation speed of each shuttlecock was measured with the base portion 2 not provided.

<Measurement result>

Table 1 shows the measurement results of the rotational speeds of the comparative examples and the examples.

As can be seen from Table 1, in the badminton 1 (Example 1) of the aforementioned embodiment, compared with the badminton 100 of the comparative example, the rotation speed can be increased by 40% or more.

In addition, in the embodiment 2 in which the gap between the fineness and denseness (the gap in the aperture ratio) is increased, the rotation speed can be further increased. In the embodiment 3 in which the shape of the lateral ribs 12B is changed, the rotation speed is further increased. In the embodiment 4, The speed is about the same as that of Example 3.

From the above results, as shown in Examples 1 to 4, by making the plurality of lateral ribs 12A inclined with respect to the feather shaft 11, it was confirmed that the rotation speed can be increased compared to the lattice-shaped ones (comparative examples).

<Other>

The embodiments described above are intended to facilitate understanding of the present invention and are not intended to limit the present invention. Changes and improvements can be made as long as they do not depart from the spirit of the invention, and of course the invention also includes equivalents.

Claims (7)

    A badminton comprises: a base portion; and a ball skirt provided on an end surface of the base portion, wherein the ball skirt portion includes: a plurality of feather shafts, which are arranged side by side on the end surface in a ring shape, and the axial direction is arranged therein; One end is respectively fixed to the end surface; and a plurality of raised ribs, so that adjacent feather shafts are connected to each other, and the raised ribs in a range between a predetermined position of the feather shaft and the other end are all relative to the feather shaft. Both are set to tilt.         The badminton as described in item 1 of the patent application range, wherein the ribs in the range are used to stagger side by side in the circumferential direction of the ball skirt to form a first feather portion and an opening ratio smaller than the opening ratio of the first feather portion. A second feather part.         The badminton as described in item 1 or 2 of the scope of patent application, wherein the nth (n is a natural number) is counted from the other end in the area on one side of the ball skirt in the circumferential direction with respect to the feather shaft. ) The convex rib; and the n-th convex rib from the other end of the area on the other side of the circumferential direction with respect to the feather shaft, and connected to the axial direction of the feather shaft at different positions.         The badminton as described in item 3 of the scope of patent application, wherein through the feather shaft, the n-th rib in the area on one side and the n-rib in the area on the other side相 连接。 Phase connection.         The badminton according to any one of claims 1 to 4 in the scope of the patent application, wherein the ribs on the one end side, which are wider than the ribs, are wider than the ribs on the one end side relative to the range. The feather shaft is set to be inclined.         The badminton as described in any one of claims 1 to 5, wherein the rib system closest to the base is orthogonal to the feather axis.         The badminton as described in any one of claims 1 to 6, wherein the predetermined position is a midpoint of the feather shaft.