JP2015029845A - Shuttlecock and artificial feather for the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a shuttlecock capable of improving flying performance.SOLUTION: A shuttlecock includes a base part, and a plurality of artificial feathers that are annularly arranged on the base part. Each of the plurality of artificial feathers comprises a sheet-like feather part 22, and a feather shaft part 24 that supports the feather part 22 and that has one shaft end fixed to the base part. The feather part 22 has a rib 22a provided in a tip-side part in an axis extension direction with respect to the other shaft end of the feather shaft part 24.

Description

  The present invention relates to a shuttlecock and an artificial feather for a shuttlecock.

  The shuttlecock for badminton uses waterfowl feathers (natural feathers) for feathers (natural shuttlecocks) and artificial feathers made of nylon resin or the like (artificial shuttles) Cook).

  As is well known, a natural shuttlecock uses about 16 natural feathers such as geese and ducks, and the end of each feather shaft is planted on a hemispherical base (base) made of cork covered with leather. This is the structure. And the blade | wing currently used for the natural shuttlecock has the small specific gravity, and it is the characteristics that it is very lightweight. In addition, the feather shaft has high rigidity and high resilience. For this reason, the natural shuttlecock provides a unique flight performance and a comfortable shot feeling that the initial speed is fast and the brake is applied.

  In contrast, artificial shuttlecocks using artificial feathers that mimic feathers have been devised in various shapes in order to increase the strength of the shaft and achieve a weight close to that of natural shuttlecocks. Compared with cocks, there is a problem that air resistance is different and flight performance is poor.

  Therefore, for example, Patent Document 1 proposes to appropriately adjust the air resistance by forming a thin-walled portion so as to protrude from the main body of the wing shaft portion of the artificial feather.

International Publication WO2011 / 021512 Pamphlet

  However, if the thin portion is protruded from the wing shaft portion, the weight of the shaft becomes heavy, and the weight balance of the entire shuttlecock becomes worse. Further, if the wing shaft main body is made smaller in order to suppress the increased weight, the rigidity of the wing shaft portion is lowered. As a result, there is a problem that the behavior at the time of flight after hitting is worse than that of a natural shuttlecock. In addition, although the rigidity of a shaft can be increased by changing the material of the wing shaft portion, generally, the use of a material having high rigidity increases the weight. Therefore, even in this case, the flight performance like a natural shuttlecock cannot be obtained.

  The present invention has been made in view of such circumstances, and an object of the present invention is to improve flight performance by improving air resistance.

The main invention for achieving the above object is:
A shuttlecock comprising a base portion and a plurality of artificial feathers arranged in an annular shape on the base portion, wherein the plurality of artificial feathers are a sheet-like wing portion and a wing that supports the wing portion A wing shaft portion, one shaft end of which is fixed to the base portion, and the wing portion is a distal end of the shaft extending direction than the other shaft end of the wing shaft portion. It is a shuttlecock characterized by having a rib in the side part.

According to the shuttlecock of the present invention, the flight performance can be improved.
Other features of the present invention will become apparent from the description of the present specification and the drawings.

It is the perspective view of the artificial shuttlecock seen from the base part side. It is a perspective view of the artificial shuttlecock seen from the artificial feather side. It is an external view of the artificial feather | wing in a comparative example. 4A and 4B are explanatory diagrams of an artificial feather of a comparative example. It is a perspective view which shows the structure of the artificial feather | wing of 1st Embodiment. It is AA sectional drawing of FIG. It is a figure for demonstrating the position of the shaft end of a wing shaft part. It is a figure which shows the modification of 1st Embodiment. It is a perspective view which shows the structure of the artificial feather | wing of 2nd Embodiment. It is AA sectional drawing of FIG. 11A and 11B are explanatory diagrams of the artificial feather according to the third embodiment. 12A to 12D are explanatory views showing the configuration of the artificial feather of the fourth embodiment.

=== Overview ===
At least the following matters will become clear from the description of the present specification and the drawings.

  A shuttlecock comprising a base portion and a plurality of artificial feathers arranged in an annular shape on the base portion, wherein the plurality of artificial feathers are a sheet-like wing portion and a wing that supports the wing portion A wing shaft portion, one shaft end of which is fixed to the base portion, and the wing portion is a distal end of the shaft extending direction than the other shaft end of the wing shaft portion. The shuttlecock is characterized by having ribs on the side portions. This rib may extend from the shaft end to the tip of the wing (hereinafter also referred to as a wing).

  According to such a shuttlecock, the portion on the tip side of the wing portion is not subject to the restriction of the shaft, so that the corresponding portion can freely move during flight. By appropriately adjusting the range of the corresponding part and the rib to be formed, the air resistance at the time of flight can be improved, and the flight performance can be improved.

In this shuttlecock, the adjacent artificial feathers among the plurality of artificial feathers are arranged on the base portion so as to form overlapping portions where the respective feather parts overlap, and the other shaft end is It is desirable that it is located on the tip side in the extending direction of the shaft with respect to the overlapping portion.
According to such a shuttlecock, it is possible to suppress the occurrence of a phenomenon in which the stacked state of adjacent wing portions is switched (hereinafter also referred to as an intersection).

In this shuttlecock, it is preferable that the rib is formed along the extending direction of the shaft.
According to such a shuttlecock, the air resistance during flight can be made appropriate.

In this shuttlecock, the wing portion is formed by bonding a first sheet member and a second sheet member, and the rib is formed by the first sheet member and the second sheet member. By sandwiching the wing shaft portion, the wing shaft portion may be formed closer to the tip side than the other shaft end of the wing shaft portion.
According to such a shuttlecock, the rib can be surely formed on the tip side of the shaft end.

In this shuttlecock, the wing shaft portion and the rib are shaft members provided to support the wing portion, and a shaft member having a fragile portion at a position corresponding to the other shaft end. It may be formed by breaking at the weak part.
According to such a shuttlecock, it is possible to facilitate positioning when the artificial feather is disposed on the base portion during manufacturing.

  An artificial shuttlecock feather arranged in an annular shape on the base part of the shuttlecock, comprising a sheet-like wing part and a wing shaft part that supports the wing part, with one shaft end being the base A shuttlecock artificial body comprising a wing shaft portion fixed to a portion, wherein the wing portion has a rib at a distal end side portion of the shaft extending direction from the other shaft end of the wing shaft portion. The feather becomes clear.

=== Structure of artificial shuttlecock ===
<Basic structure of artificial shuttlecock>
1 and 2 are external views for explaining the basic structure of the artificial shuttlecock 1 including the artificial feather 10. FIG. 1 is a perspective view of the artificial shuttlecock 1 viewed from the base portion 2 side. FIG. 2 is a perspective view of the artificial shuttlecock 1 viewed from the artificial feather 10 side.

  The artificial shuttlecock 1 includes a base portion 2, a plurality of artificial feathers 10 imitating natural feathers, and a string-like member 3 for fixing the artificial feathers 10 to each other. The base part 2 is configured by covering a thin skin on a cork base, for example. The shape of the base part 2 is a hemispherical shape with a diameter of 25 mm to 28 mm, and has a flat surface. The roots of the plurality of artificial feathers 10 are embedded in an annular shape along the circumference of the flat surface. The plurality of artificial feathers 10 are arranged such that the distance between them increases as the distance from the base portion 2 increases. Further, as shown in the figure, each artificial feather 10 is arranged so as to overlap with the adjacent artificial feather 10. Thereby, the skirt part 4 is formed by the plurality of artificial feathers 10. The plurality of artificial feathers 10 are fixed to each other by a string-like member 3 (for example, a cotton thread).

<Structure of artificial feather (comparative example)>
FIG. 3 is an external view of the artificial feather 10 in the comparative example. 4A and 4B are explanatory diagrams of the artificial feather 10 of the comparative example. FIG. 4A is a plan view of the artificial feather 10 viewed from the front side. FIG. 4B is a plan view of the artificial feather 10 viewed from the back side. In these drawings, the members already described are given the same reference numerals.

  The artificial feather 10 includes a wing part 12 and a wing shaft part 14. The wing part 12 is a part corresponding to a feather valve of a natural feather, and the wing shaft part 14 is a part corresponding to a feather axis of a natural feather. In the drawing, the vertical direction is defined along the wing shaft portion 14, and the side where the wing portion 12 is located is defined as the upper side, and the opposite side is defined as the lower side. In the drawing, the left-right direction is defined along the direction (width direction) in which the wing part 12 extends from the wing shaft part 14. Further, in the drawing, the front and the back are defined based on the state in which the artificial feather 10 is attached to the base portion 2. Below, each component may be described according to the upper, lower, left, and right sides defined in the figure.

  The wing portion 12 is a sheet-like member simulating the shape of a natural feather feather valve. The wing part 12 can be comprised, for example with a nonwoven fabric, resin, etc. In the case of using a nonwoven fabric, a reinforcing film is formed on the surface in order to prevent the nonwoven fabric fibers from being loosened at the time of hitting. The reinforced film can be formed by applying a resin. For example, various coating methods such as a dip method, a spray method, and a roll coating method are employed. Note that the reinforcing coating may be formed on one side of the wing 12 or on both sides. Further, the reinforcing film may be formed on the entire surface of the wing portion 12 or may be formed on a part thereof. Moreover, the shape of the wing | blade part 12 is not limited to the shape of a figure. For example, it may be oval.

  The wing shaft portion 14 is an elongated member that imitates the shape of the wing shaft of a natural wing, and is a member that supports the wing portion 12. The wing shaft portion 14 includes a wing support portion 14 </ b> A that supports a region from the upper end to the lower end of the wing portion 12, and a wing pattern portion 14 </ b> B protruding from the wing portion 12. The wing pattern portion 14B is a portion corresponding to a wing pattern of a natural feather (unusual: this part may be referred to as a wing). A shaft end (lower end of the wing pattern portion 14 </ b> B) 142 of the wing shaft portion 14 is embedded in the base portion 2 and fixed to the base portion 2. On the other hand, the shaft end (upper end of the wing support portion 14 </ b> A) 141 of the wing shaft portion 14 coincides with the upper end of the wing portion 12.

  The wing shaft portion 14 in the drawing has a cross-sectional shape drawn in a square shape. However, the cross-sectional shape of the wing shaft portion 14 may be a rhombus shape, or may be a circular shape or an elliptical shape. Further, in order to increase the strength of the wing shaft portion 14, the cross-sectional shape of the wing shaft portion 14 may be a shape in which a part of the wing shaft portion 14 protrudes like a T shape or a cross shape. Further, the cross-sectional shape of the wing shaft portion 14 may be different in the vertical direction so that, for example, the upper side is circular and the lower side is square. Further, the wing shaft portion 14 in the figure is formed so that the cross-sectional shape becomes larger toward the lower side. However, the size of the cross-sectional shape may be constant without changing in the vertical direction, or the size of the cross-sectional shape may change smoothly. The same applies to the following embodiments.

  In addition, the wing shaft portion 14 and the wing portion 12 may be separate or integrated. For example, when resin is used as the material of the wing shaft portion 14 and the wing portion 12, the wing shaft portion 14 and the wing portion 12 can be integrally formed by injection molding using a mold. Further, the wing shaft portion 14 and the wing portion 12 can be integrally formed of different materials by injection molding (two-color molding) using two kinds of materials (resins). In addition, the wing shaft part 14 and the wing part 12 of this example (comparative example) are integrally formed by the two-color molding described above.

  Further, the wing part 12 may be supported on the back side of the wing support part 14A, or the wing part 12 may be supported on the front side of the wing support part 14A. Further, the wing portion 12 may be configured by two sheets, and the two wing portions 12 may be configured to sandwich the wing support portion 14A. Further, the wing part 12 may be embedded in the wing support part 14A.

<About flight performance>
Natural shuttlecocks can be moderately decelerated with proper air resistance. For this reason, the natural shuttlecock provides a unique flight performance with a fast initial speed and braking. On the other hand, in the artificial shuttlecock 1 using the artificial feather 10, the air resistance is different from that of the natural shuttlecock and the flight performance as described above cannot be obtained. Also, the shuttlecock is greatly deformed at the time of hitting, and it flies while restoring it. Natural shuttlecocks have high wing shaft rigidity, so they are restored to their original shape regardless of the cumulative number of strikes. This restoration increases the air resistance and brakes. On the other hand, in the artificial shuttlecock 1, since the wing shaft portion 14 is made of resin, it cannot be restored to the original shape according to the cumulative number of hits. That is, since the outer diameter of the 16 wings 12 arranged in an annular shape on the base portion 2 changes from the original outer diameter, the air resistance also changes. For this reason, the flight performance gradually deteriorates as the hit is repeated.

  In order to improve the flight performance, a method of changing the rigidity of the material or utilizing the air resistance received during flight is common. Here, generally, when the rigidity is increased (when a highly rigid material is used), the weight increases. When the weight increases, the weight balance of the entire shuttlecock deteriorates, and as a result, the behavior during flight after hitting deteriorates. Therefore, in this embodiment, the flight performance is improved by utilizing air resistance. Therefore, in the following embodiment, the air resistance is increased without substantially increasing or decreasing the weight. Specifically, the flight performance is improved by improving the configuration of the tip of the wing that is susceptible to air resistance during flight.

=== First Embodiment ===
FIG. 5 is a perspective view showing the configuration of the artificial feather 20 of the first embodiment. FIG. 6 is a cross-sectional view taken along the line AA in FIG. The artificial feather 20 of the first embodiment has a wing part 22 and a wing shaft part 24. The wing portion 22 and the wing shaft portion 24 correspond to the wing portion 12 and the wing shaft portion 14 in the comparative example, respectively, and are integrally formed by two-color molding. However, the wing shaft portion 24 of the first embodiment is not provided up to the upper end (tip) of the wing portion 22. In other words, the wing portion 22 has a portion that is not restricted by the shaft above the shaft end 241 of the wing shaft portion 24 (the tip side in the shaft extending direction). Since the natural shuttlecock has a lower wing shaft than the wing valve, the wing portion 22 of the artificial shuttlecock has a lower rigidity than the wing shaft portion 24.

  Moreover, the wing | blade part 22 has the rib 22a. The rib 22a is formed of the same material as the wing portion 22, and is provided so as to protrude in a convex shape on the extension of the shaft of the wing shaft portion 24 at a portion above the shaft end 241 of the wing portion 22. It has been. That is, the artificial feather 20 has a structure in which the rib 22 a of the wing part 22 is formed in place of the axis of the wing shaft part 24 at the upper end side portion of the wing part 22.

  In the case of the artificial feather 10 of the comparative example, the wing shaft portion 14 is provided up to the upper end of the wing portion 12. For this reason, the movement of the wing part 12 is regulated by the wing shaft part 14 in the extending direction of the axis of the wing shaft part 14. On the other hand, the artificial feather 20 has a portion on the upper end (tip) side of the wing portion 22 that is not restricted by the wing shaft portion 24. Further, the rib 22 a provided in the part is formed of the same material (resin) as the wing part 22. That is, the wing part 22 above the shaft end 241 is bent more in the normal direction of the surface of the wing part 22 than other parts. Therefore, since the shaft is not restricted by the wing shaft portion 24 on the upper end (tip) side of the wing portion 22, the wing portion 22 can freely move at the time of flight in the portion on the upper side of the shaft as compared with the comparative example.

  FIG. 7 is a view for explaining the position of the shaft end 241 of the wing shaft portion 24. As described with reference to FIGS. 1 and 2, when the artificial feather 20 is applied to the artificial shuttlecock 1, each artificial feather 20 (wing part 22) overlaps with the adjacent artificial feather 20 (wing part 22). (The hatched portion in FIG. 7). In the present embodiment, as shown in FIG. 7, the shaft end 241 of the wing shaft portion 24 is arranged on the upper side (tip side) of the overlapping portion (hereinafter also referred to as the overlapping portion).

  This is because, if the shaft end 241 is below the overlapping portion, a phenomenon in which the stacked state of the adjacent wing portions 22 is easily changed when receiving an impact at the time of hitting a ball is likely to occur. As shown in the figure, by causing the position of the shaft end 241 to be higher than the overlapping part of the adjacent wing parts 22, it is possible to suppress the occurrence of an intersection in which adjacent wing parts are switched.

  As described above, the artificial feather 20 of the present embodiment includes the sheet-like wing portion 22 and the wing shaft portion 24 that supports the wing portion 22 with the shaft end 242 fixed to the base portion 2. And the wing | blade part 22 has the site | part of the front end side of the extension direction of an axis | shaft rather than the shaft end 241 of the wing shaft part 24, and the rib 22a is formed in the said site | part.

  Thereby, since the front end side of the wing | blade part 22 does not receive restrictions of an axis | shaft at the time of flight, the artificial feather 20 becomes easy to move freely compared with the artificial feather 10 of a comparative example. Therefore, by applying this artificial feather 20 to the artificial shuttlecock 1, the air resistance at the time of flight can be improved and the flight performance can be improved.

  The artificial feather 20 may be applied to all 16 blades of the artificial shuttlecock 1, or the artificial feather 10 and the artificial feather 20 may be used in combination. For example, some of the 16 artificial feathers 10 of the artificial shuttlecock 1 of FIGS. 1 and 2 may be changed to the artificial feather 20.

<Modification of First Embodiment>
FIG. 8 is a diagram illustrating an example of a modification of the first embodiment. In the first embodiment described above, the rib 22 a is formed on the extension of the axis of the wing shaft portion 24. One artificial feather 20 has one rib 22a.

  In this modification, two ribs 22a are formed. Further, the two ribs 22a are formed along the shaft on the left and right sides of the shaft, not on the extension of the shaft of the wing shaft portion 24. Even in this case, the flight performance can be improved. The two ribs 22a may not be arranged symmetrically with respect to the axis. Further, the number of ribs 22a may be two or more. In addition, the rib 22a may be formed in a portion above the shaft end 241 in the wing portion 22 and may not be along the axial direction. For example, it may be formed obliquely with respect to the axis.

  In the present embodiment, the shape (cross-sectional shape) of the rib 22a is a trapezoid, but is not limited thereto. For example, the cross-sectional shape may be a rectangle, a triangle, a polygon, a semicircle, or the like.

=== Second Embodiment ===
In the second embodiment, the configuration of the artificial feather is different from that of the first embodiment.

  FIG. 9 is a perspective view showing the configuration of the artificial feather 30 of the second embodiment. FIG. 10 is a cross-sectional view taken along the line AA in FIG. The artificial feather 30 of the second embodiment has a wing part 32 and a wing shaft part 34.

  The wing shaft portion 34 is a member having the same configuration as the wing shaft portion 24 of the first embodiment, and the shaft ends 341 and 342 correspond to the shaft ends 241 and 242, respectively. On the other hand, the wing portion 32 has two blade-shaped sheet members (a first sheet member 321 and a second sheet member 322). The wing portion 32 is formed by bonding the first sheet member 321 and the second sheet member 322 with the wing shaft portion 34 interposed therebetween. At this time, the shaft end 341 of the wing shaft portion 34 is set to be lower than the tip of the wing portion 32 as in the first embodiment. Further, the wing portion 32 is formed with a convex portion 32a.

  The first sheet member 321 is formed of a nonwoven fabric and is disposed on the front side of the wing portion 32. In addition, the thing of a long fiber is used as a nonwoven fabric, and the reinforced film is formed in the surface.

  The second sheet member 322 is formed of a foam sheet and is disposed on the back side of the wing portion 32.

  The convex portion 32 a (corresponding to a rib) is formed on the upper side (tip side) of the shaft end 341 of the wing shaft portion 34. The convex portion 32 a is formed by bonding the first sheet member 321 and the second sheet member 322 so as to sandwich the blade shaft portion 34. That is, since the wing shaft portion 34 has a thickness, when the wing shaft portion 34 is sandwiched between the first sheet member 321 and the second sheet member 322 and bonded together, the first sheet member 321 and the second sheet member 321 are connected to the first sheet member 321 and the second sheet on the tip side. A space in which the sheet member 322 is not completely adhered is formed, and a convex portion 32a is formed (see FIG. 10). The same effect as that of the rib 22a of the first embodiment can be obtained by the convex portion 32a.

  Thus, in 2nd Embodiment, the convex part 32a can be reliably formed in the front end side rather than an axial end by bonding the 1st sheet member 321 and the 2nd sheet member 322 so that the wing shaft part 34 may be pinched | interposed. Also in the second embodiment, the wing portion 32 has a portion that is not restricted by the shaft on the distal end side in the shaft extending direction from the shaft end of the wing shaft portion 34, and protrudes from the portion. A portion 32a is formed. Therefore, by using the artificial feather 30 of the second embodiment as the blade of the artificial shuttlecock 1, air resistance can be improved similarly to the first embodiment, and flight performance can be improved.

  Also in the second embodiment, it is desirable that the position of the shaft end 341 of the wing shaft portion 34 is on the tip side with respect to the overlapping portion of adjacent wing portions 32 (see the hatched portion in FIG. 7). By doing so, it is possible to suppress the occurrence of an intersection where adjacent wings are interchanged.

  Further, in the present embodiment, the first sheet member 321 is disposed on the front side of the wing portion 32 and the second sheet member 322 is disposed on the back side, but the reverse may be possible. That is, the second sheet member 322 may be disposed on the front side of the wing portion 32 and the first sheet member 321 may be disposed on the back side.

=== Third Embodiment ===
The third embodiment is different from the above-described embodiment in the configuration of the wing shaft portion and the wing portion.

  11A and 11B are explanatory views of the artificial feather 40 of the third embodiment.

  As shown in FIG. 11A, the artificial feather 40 has a wing part 42 and a wing shaft part 44. The wing portion 42 of the third embodiment is formed so that the wing shaft portion 44 is sandwiched between two sheet members as in the second embodiment. However, in the figure, for convenience of explanation, one sheet member is provided. Only shows.

  As shown in the figure, the wing shaft portion 44 (corresponding to the shaft member) of the third embodiment is formed up to the upper end of the wing portion 42. In addition, a dent 44a (corresponding to a fragile part) is formed at the upper end of the wing shaft part 44, and the width in the left-right direction of the dent 44a is much shorter than the width in other parts. Yes. Thereby, it can be easily broken at the position of the recess 44a (for example, by an impact caused by one hit).

  As shown in FIG. 11B, the wing shaft portion 44 is separated into a wing shaft portion 44 ′ and a piece 43 (corresponding to a rib) by folding the wing shaft portion 44 at the hollow portion 44a. Further, the portion where the hollow portion 44a is formed in the wing shaft portion 44 becomes the shaft end 441 of the wing shaft portion 44 '.

  The fragment 43 is formed in a portion of the wing portion 42 on the tip side in the extending direction of the shaft with respect to the shaft end 441 of the wing shaft portion 44 ′. Further, since the fragment 43 is fixed to the wing portion 42 and separated from the wing shaft portion 44 ', the portion of the wing portion 42 where the fragment 43 is formed restricts the axis of the wing shaft portion 44'. I do not receive it.

  Therefore, by using the artificial feather 40 of the third embodiment as the blade of the artificial shuttlecock 1, air resistance can be improved similarly to the above-described embodiment, and flight performance can be improved. Furthermore, in the above-described embodiment, there is no shaft at the tip of the wing portion, whereas in this embodiment (FIG. 11A), the shaft is arranged up to the tip. Thereby, when the artificial shuttlecock 1 is manufactured, when the artificial feather 40 is disposed on the base portion 2, it is easier to position than the above-described embodiment.

  In addition, in this embodiment, although the hollow part 44a had width (length in the left-right direction) shorter than another site | part, it should just become easy to bend | fold at the said site | part, and may be another shape. . For example, the thickness between the front side and the back side may be thin.

  Also in the third embodiment, it is desirable that the shaft end 441 of the wing shaft portion 44 ′ is on the tip side of the overlapping portion of the adjacent wing portion 42. By doing so, it is possible to suppress the occurrence of an intersection where adjacent wings are interchanged.

=== Fourth Embodiment ===
In 4th Embodiment, the structure of a wing | blade part differs from the above-mentioned embodiment.

  12A to 12D are explanatory diagrams illustrating an example of the configuration of the artificial feather 50 according to the fourth embodiment. The artificial feather 50 has a wing part 52, a wing shaft part 54, and a rib 52a. The wing part 52, the wing shaft part 54, the shaft end 541 and the rib 52a correspond to the wing part 22, the wing shaft part 24, the shaft end 241 and the rib 22a of the first embodiment, respectively. It is the composition. Therefore, the description is omitted.

  The artificial feather 50 in FIG. 12A has a slit 521 in the wing portion 52. The slit 521 is formed in a V shape at a portion of the wing portion 52 that is more distal than the shaft end 541 of the wing shaft 54. By providing such a slit 521, the shaft is not restricted at a portion outside the slit 521 (right side in the drawing) with respect to the shaft. For this reason, the part can move freely. Therefore, by applying this artificial feather 50 to the artificial shuttlecock 1, the air resistance can be improved and the flight performance can be improved. It is desirable that the position of the upper end of the slit 521 be on the upper side (tip side) of the overlapping part of the wing part 52. More desirably, the position of the lower end of the slit 521 is also higher than the overlapping part of the wing part 52 (the front end side). By doing so, it is possible to suppress the occurrence of an intersection where adjacent wings are switched.

  It should be noted that the formation position of the slit 521 is desirably a position corresponding to the downstream side in the rotation direction of the artificial shuttlecock 1. In FIG. 12A, one slit 521 is formed in one wing 52, but the present invention is not limited to this, and a plurality of slits 521 may be provided. For example, a slit 521 may be provided on the opposite side (left side in the figure) with respect to the axis.

  The artificial feather 50 in FIG. 12B has a slit 522 in the wing portion 52. The slit 522 is formed in a straight line along the extending direction of the shaft at a position on the tip side of the shaft end 541 of the blade shaft 54. The artificial feather 50 in FIG. 12C has a slit 523 in the wing portion 52. The slit 523 is linearly formed in an oblique direction with respect to the extending direction of the shaft at a portion on the tip side of the shaft end 541 of the wing shaft 54.

  Note that the formation positions and the number of the slits 522 and the slits 523 are the same as those of the slits 521 described above, and thus the description thereof is omitted. Also in these cases, by applying to the artificial shuttlecock 1, air resistance can be improved and flight performance can be improved.

  In addition, when providing each slit (slit 521, 522, 523) like FIG. 12A-FIG. 12C, stress tends to concentrate on the edge part (lower end) of each slit, and it is easy to tear at this location. For this reason, it is desirable that the wing portion 52 be formed by attaching two sheet members as in the second embodiment. Furthermore, it is desirable to use a nonwoven fabric and a foam sheet for the two sheet members. If two foam sheets are bonded together, the tear strength is weak, and there is a risk of damage due to impact.

  The artificial feather 50 in FIG. 12D has a protrusion 524 on the wing portion 52. The protrusion 524 is provided in a substantially triangular shape so as to protrude upward at the upper end of the wing portion 52. The protrusion 524 can move freely without being restricted by the axis of the wing shaft 54. In the figure, the number of the protrusions 524 formed on one wing 52 is one, but the present invention is not limited to this, and a plurality of protrusions 524 may be provided. For example, the protrusion 524 may be provided on the opposite side (left side in the drawing) with respect to the axis of the wing shaft 54. By applying the artificial feather 50 provided with the protrusions 524 to the artificial shuttlecock 1 in this way, air resistance can be improved and flight performance can be improved. Note that the shape of the protrusion 524 is not limited to a triangle. For example, it may be semicircular or trapezoidal.

=== Others ===
The above-described embodiments are for facilitating the understanding of the present invention, and are not intended to limit the present invention. The present invention can be changed and improved without departing from the gist thereof, and it is needless to say that the present invention includes equivalents thereof.

1 Artificial shuttlecock,
2 Base part,
3 string members,
4 Skirt,
10, 20, 30, 40, 50 Artificial feathers,
12, 22, 32, 42, 50 wings,
14, 24, 34, 44, 44 ', 54
14A wing support,
14B Feather handle,
141, 241, 341, 441, 541 shaft end,
142, 242, 342 shaft end,
22a, 52a ribs,
321 first sheet member,
322 second sheet member,
32a convex part,
43 fragment 44a indentation,
521, 522, 523 slit,
524 protrusion

Claims (6)

A base part;
A plurality of artificial feathers arranged in an annular shape in the base portion;
A shuttlecock equipped with
The plurality of artificial feathers are:
Sheet-like wings,
A wing shaft portion that supports the wing portion, and one wing shaft portion is fixed to the base portion;
The shuttlecock according to claim 1, wherein the wing portion has a rib at a position closer to a tip side in an extending direction of the shaft than the other shaft end of the wing shaft portion. The shuttlecock according to claim 1,
The artificial feathers adjacent to each other among the plurality of artificial feathers are arranged on the base portion so as to form an overlapping portion where each of the feather portions overlaps,
The other shaft end is located closer to the tip side in the extending direction of the shaft than the overlapping portion.
A shuttlecock characterized by that. The shuttlecock according to claim 1 or 2,
The rib is formed along the extending direction of the shaft.
A shuttlecock characterized by that. A shuttlecock according to any one of claims 1 to 3,
The wing portion is formed by bonding a first sheet member and a second sheet member,
The rib has the first sheet member and the second sheet member sandwiched between the first shaft member and the second sheet member so that the first sheet member and the second sheet member are closer to the tip than the other shaft end of the blade shaft portion. A shuttlecock, characterized in that it is provided by forming a space in which the second sheet member does not adhere. A shuttlecock according to any one of claims 1 to 3,
The wing shaft portion and the rib are shaft members provided to support the wing portion, and a shaft member having a fragile portion at a position corresponding to the other shaft end is broken at the fragile portion. Formed by the
A shuttlecock characterized by that. An artificial feather for a shuttlecock arranged in an annular shape at the base of the shuttlecock,
A sheet-shaped wing portion, and a wing shaft portion that supports the wing portion, and one wing end includes a wing shaft portion fixed to the base portion;
The shuttlecock artificial feather for a shuttlecock, wherein the wing portion has a rib at a tip side in a direction in which the shaft extends from the other shaft end of the wing shaft portion.