WO2021166517A1 - バドミントンラケット - Google Patents

バドミントンラケット Download PDF

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Publication number
WO2021166517A1
WO2021166517A1 PCT/JP2021/001550 JP2021001550W WO2021166517A1 WO 2021166517 A1 WO2021166517 A1 WO 2021166517A1 JP 2021001550 W JP2021001550 W JP 2021001550W WO 2021166517 A1 WO2021166517 A1 WO 2021166517A1
Authority
WO
WIPO (PCT)
Prior art keywords
shaft
measurement point
flexural rigidity
sheet
rigidity value
Prior art date
Application number
PCT/JP2021/001550
Other languages
English (en)
French (fr)
Japanese (ja)
Inventor
渉 君塚
Original Assignee
住友ゴム工業株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 住友ゴム工業株式会社 filed Critical 住友ゴム工業株式会社
Priority to EP21757626.3A priority Critical patent/EP4098334A4/de
Publication of WO2021166517A1 publication Critical patent/WO2021166517A1/ja

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    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B60/00—Details or accessories of golf clubs, bats, rackets or the like
    • A63B60/0081—Substantially flexible shafts; Hinged shafts
    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B49/00—Stringed rackets, e.g. for tennis
    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B2102/00—Application of clubs, bats, rackets or the like to the sporting activity ; particular sports involving the use of balls and clubs, bats, rackets, or the like
    • A63B2102/04—Badminton
    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B2209/00—Characteristics of used materials
    • A63B2209/02—Characteristics of used materials with reinforcing fibres, e.g. carbon, polyamide fibres
    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B2209/00—Characteristics of used materials
    • A63B2209/02—Characteristics of used materials with reinforcing fibres, e.g. carbon, polyamide fibres
    • A63B2209/023—Long, oriented fibres, e.g. wound filaments, woven fabrics, mats
    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B60/00—Details or accessories of golf clubs, bats, rackets or the like
    • A63B60/42—Devices for measuring, verifying, correcting or customising the inherent characteristics of golf clubs, bats, rackets or the like, e.g. measuring the maximum torque a batting shaft can withstand

Definitions

  • the present invention relates to a badminton racket.
  • the present invention relates to improvements to the shaft of this racket.
  • the badminton racket has a frame, string and shaft.
  • the player shoots the shuttle with a racket. At the time of shot, the shaft is deformed.
  • Robbing is often hit from near the net on the player's court. Robbing is a shot intended to carry the shuttle to the back of the opponent's court. The trajectory of the shuttle at Robbing is high. Players need the skill to fly the shuttle at the intended height. Robbing-heavy players want a stable trajectory for the shuttle.
  • the ratio of the flexural rigidity value EI (2) to the flexural rigidity value EI (1) is 0.95 or less.
  • the ratio of the flexural rigidity value EI (3) to the flexural rigidity value EI (2) is 0.90 or less.
  • the difference between the flexural rigidity value EI (2) and the flexural rigidity value EI (1) (EI (2) -EI (1)) is ⁇ 0.30 Nm 2 or less.
  • the difference between the flexural rigidity value EI (3) and the flexural rigidity value EI (2) (EI (3) -EI (2)) is ⁇ 0.5 Nm 2 or less.
  • the shaft may have a hollow structure.
  • the inner diameter of the shaft from the first measurement point to the third measurement point is substantially uniform.
  • the outer diameter of the shaft from the first measurement point to the third measurement point is substantially uniform.
  • the shaft has a fiber reinforced layer.
  • the fiber reinforced layer is arranged in a zone containing the first measurement point and not including the second measurement point and the third measurement point in the axial direction.
  • This fiber reinforcing layer contains a plurality of reinforcing fibers that are substantially axially oriented.
  • a player using the badminton racket according to the present invention tends to make a shot in which the shaft bends mainly in the out-of-plane direction.
  • This racket can contribute to the victory of the game.
  • FIG. 8 is a graph showing the flexural rigidity distribution of the racket shaft according to the comparative example.
  • FIG. 9 is a graph showing the flexural rigidity distribution of the racket shaft according to the second embodiment of the present invention.
  • FIG. 10 is a graph showing the flexural rigidity distribution of the racket shaft according to the third embodiment of the present invention.
  • thermosetting resins such as epoxy resin, pismareimide resin, polyimide and phenol resin; and polyether ether ketone, polyether sulfone, polyetherimide, polyphenylene sulfide, polyamide and polypropylene.
  • Thermoplastic resin is exemplified.
  • a resin particularly suitable for the shaft 4 is an epoxy resin.
  • reference numeral L is the length of the exposed portion of the shaft 4.
  • the length L is usually 150 mm or more and 210 mm or less.
  • FIG. 3 is an enlarged cross-sectional view showing a part of the shaft 4 of the racket 2 of FIG.
  • FIG. 4 is an enlarged cross-sectional view taken along the line IV-IV of FIG.
  • the shaft 4 is hollow.
  • the cross-sectional shape of the shaft 4 is a circle. In other words, the shaft 4 has a cylindrical shape.
  • the shaft 4 is made of fiber reinforced resin.
  • the shaft 4 can be manufactured by a sheet winding method. In this sheet winding method, multiple prepregs are wrapped around the mandrel. Each prepreg has a plurality of fibers and a matrix resin. This matrix resin is not cured.
  • the fourth fiber reinforcing layer is formed from S4, the fifth fiber reinforcing layer is formed from the fifth sheet S5, the sixth fiber reinforcing layer is formed from the sixth sheet S6, and the seventh fiber reinforcing layer is formed from the seventh sheet S7. It is formed, and the eighth fiber reinforcing layer is formed from the eighth sheet S8.
  • the left-right direction in FIG. 5 is the axial direction of the shaft 4.
  • the positions of the bad end 18 and the chip end 20 are indicated by arrows.
  • the positions of the three measurement points P1, P2, and P3, which will be described later, are indicated by arrows.
  • the scale in the left-right direction (axial direction) does not match the scale in the up-down direction.
  • the first sheet S1 exists over the entire shaft 4.
  • the shape of the first sheet S1 is substantially rectangular.
  • the first sheet S1 contains a plurality of carbon fibers arranged in parallel.
  • the extending direction of each carbon fiber is inclined with respect to the axial direction.
  • the angle of the extending direction of the carbon fibers with respect to the axial direction is 30 ° or more and 60 ° or less. In this embodiment, this angle is 45 °.
  • the first sheet S1 has a width of 100 mm and a length of 340 mm.
  • the second sheet S2 exists over the entire shaft 4.
  • the shape of the second sheet S2 is substantially rectangular.
  • the second sheet S2 contains a plurality of carbon fibers arranged in parallel.
  • the extending direction of each carbon fiber is inclined with respect to the axial direction.
  • the angle of the extending direction of the carbon fibers with respect to the axial direction is ⁇ 60 ° or more and ⁇ 30 ° or less. In this embodiment, this angle is ⁇ 45 °.
  • the second sheet S2 has a width of 100 mm and a length of 340 mm.
  • the inclination direction of the carbon fibers in the fourth sheet S4 is opposite to the inclination direction of the carbon fibers in the third sheet S3. Therefore, the inclination direction of the carbon fibers in the fourth fiber reinforcing layer is opposite to the inclination direction of the carbon fibers in the third fiber reinforcing layer.
  • a bias structure is achieved by a third fiber reinforced layer and a fourth fiber reinforced layer.
  • the third fiber reinforcing layer and the fourth fiber reinforcing layer contribute to the flexural rigidity and the torsional rigidity of the middle portion 14 and the tip portion 16.
  • the third fiber reinforcing layer and the fourth fiber reinforcing layer particularly contribute to the torsional rigidity of the middle portion 14 and the tip portion 16.
  • the fifth sheet S5 is biased toward the bad end 18 side of the shaft 4.
  • the shape of the fifth sheet S5 is generally trapezoidal.
  • the fifth sheet S5 contains a plurality of carbon fibers arranged in parallel. The extending direction of each carbon fiber coincides with the axial direction. In other words, the angle of the extending direction of the carbon fibers with respect to the axial direction is substantially 0 °.
  • the width is 80 mm
  • the length of the upper base is 145 mm
  • the length of the lower base is 155 mm.
  • the carbon fibers contained in the fifth sheet S5 are substantially oriented in the axial direction. Therefore, even in the fifth fiber reinforcing layer, the carbon fibers are substantially oriented in the axial direction.
  • a structure in which the carbon fibers are substantially axially oriented is referred to as a "straight structure".
  • the fifth fiber reinforced layer has a straight structure. When the shaft 4 bends, a large tension is applied to these carbon fibers. This tension suppresses further bending of the shaft 4. In other words, these carbon fibers contribute to the flexural rigidity of the shaft 4. As shown in FIG.
  • the fifth sheet S5 is arranged in a zone containing the first measurement point P1 and not including the second measurement point P2 and the third measurement point P3 in the axial direction. Therefore, the fifth fiber reinforced layer is also located in the zone containing the first measurement point P1 and not including the second measurement point P2 and the third measurement point P3 in the axial direction.
  • the fifth fiber reinforcing layer particularly contributes to the flexural rigidity of the bad portion 12.
  • the sixth sheet S6 is biased toward the tip end 20 side of the shaft 4.
  • the shape of the sixth sheet S6 is generally trapezoidal.
  • the sixth sheet S6 contains a plurality of carbon fibers arranged in parallel.
  • the extending direction of each carbon fiber is inclined with respect to the axial direction.
  • the angle of the extending direction of the carbon fibers with respect to the axial direction is 30 ° or more and 60 ° or less. In this embodiment, this angle is 45 °.
  • the width is 20 mm
  • the length of the upper base is 95 mm
  • the length of the lower base is 105 mm.
  • the inclination direction of the carbon fibers in the seventh sheet S7 is opposite to the inclination direction of the carbon fibers in the sixth sheet S6. Therefore, the inclination direction of the carbon fibers in the seventh fiber reinforcing layer is opposite to the inclination direction of the carbon fibers in the sixth fiber reinforcing layer.
  • a bias structure is achieved by the sixth fiber reinforcing layer and the seventh fiber reinforcing layer.
  • the sixth fiber reinforcing layer and the seventh fiber reinforcing layer contribute to the flexural rigidity and the torsional rigidity of the bad portion 12.
  • the sixth fiber reinforcing layer and the seventh fiber reinforcing layer particularly contribute to the torsional rigidity of the bad portion 12.
  • the eighth sheet S8 is biased toward the bad end 18 side of the shaft 4.
  • the shape of the eighth sheet S8 is generally trapezoidal.
  • the eighth sheet S8 contains a plurality of carbon fibers arranged in parallel. The extending direction of each carbon fiber coincides with the axial direction. In other words, the angle of the extending direction of the carbon fibers with respect to the axial direction is substantially 0 °.
  • the width is 40 mm
  • the length of the upper base is 235 mm
  • the length of the lower base is 245 mm.
  • the carbon fibers contained in the eighth sheet S8 are substantially oriented in the axial direction. Therefore, even in the eighth fiber reinforcing layer, the carbon fibers are substantially oriented in the axial direction.
  • the eighth fiber reinforcing layer has a straight structure. When the shaft 4 bends, a large tension is applied to these carbon fibers. This tension suppresses further bending of the shaft 4. In other words, these carbon fibers contribute to the flexural rigidity of the shaft 4.
  • the eighth sheet S8 is arranged in a zone containing the first measurement point P1 and the second measurement point P2 and not including the third measurement point P3 in the axial direction.
  • Wrapping tape is further wrapped around these sheets.
  • These mandrels, prepregs (sheets S1-S8) and lapping tape are heated in an oven or the like. By heating, the resin of the matrix flows. Further heating causes the resin to undergo a curing reaction to obtain a molded product. The end face is processed, polished, painted, and the like to complete the shaft 4.
  • FIG. 6 is a schematic view showing a method of measuring the flexural rigidity value EI of the shaft 4 of the racket 2 of FIG.
  • FIG. 6 shows the measurement at the measurement point P where the distance from the grip 8 is L1.
  • the shaft 4 is supported from below by the first support point 28 and the second support point 30.
  • the distance from the measurement point P to the first support point 28 is 30 mm.
  • the distance from the measurement point P to the second support point 30 is 30 mm.
  • the measurement is performed by a universal material testing machine (trade name "2020" of Intesco Co., Ltd.).
  • This testing machine has an indenter 32.
  • the shape of the indenter 32 is a hemisphere.
  • the radius of curvature of this hemisphere is 20 mm.
  • the indenter 32 gradually descends at a speed of 2 mm / min.
  • the indenter 32 comes into contact with the measurement point P and further pushes the shaft 4. This push gradually bends the shaft 4.
  • the amount of deflection B (m) of the shaft 4 when the load on the shaft 4 by the indenter 32 reaches 100 N is measured.
  • This amount of deflection B is substituted into the following mathematical formula to calculate the flexural rigidity value EI (Nm 2 ).
  • EI F ⁇ L2 3 / (48 ⁇ B)
  • F is the load (N)
  • L2 is the distance (m) between the two support points
  • B is the amount of deflection (m).
  • the load F is 100N and the distance L2 is 0.06m.
  • the flexural rigidity value EI of the shaft 4 may be measured in a state where the grip 8 and the frame 6 are not attached.
  • the flexural rigidity value EI is measured at the first measurement point P1, the second measurement point P2, and the third measurement point P3.
  • the distance L1 from the grip 8 to each measurement point is as follows. First measurement point P1: 35 mm Second measurement point P2: 95 mm Third measurement point P3: 155 mm
  • the flexural rigidity value EI (1) at the first measurement point P1 is 4.97 Nm 2
  • the flexural rigidity value EI (2) at the second measurement point P2 is 3. It is .56 Nm 2
  • the flexural rigidity value EI (3) at the third measurement point P3 is 2.06 Nm 2 .
  • the flexural rigidity distribution of the shaft 4 is shown in the graph of FIG.
  • the flexural rigidity value EI (2) at the second measurement point P2 is smaller than the flexural rigidity value EI (1) at the first measurement point P1.
  • the flexural rigidity value EI (3) at the third measurement point P3 is smaller than the flexural rigidity value EI (2) at the second measurement point P2.
  • the shaft 4 has a flexural rigidity distribution that descends forward.
  • the fifth fiber reinforced layer is located in a zone containing the first measurement point P1 and not including the second measurement point P2 and the third measurement point P3 in the axial direction.
  • the eighth fiber reinforced layer is located in a zone containing the first measurement point P1 and the second measurement point P2 and not including the third measurement point P3 in the axial direction.
  • the shaft 4 having a bending rigidity distribution that descends forward is suitable for lobing.
  • a player who performs lobing using this racket 2 can easily obtain the trajectory intended by the shuttle.
  • the variation in the height of the trajectory of the shuttle in lobing is small.
  • the reason why the racket 2 according to the present invention is suitable for lobing is that the flexural rigidity distribution shown in FIG. 7 matches the deformation behavior of the shaft 4 in lobing. In lobing, the shaft 4 mainly bends in the out-of-plane direction (Z direction).
  • the racket 2 according to the present invention is also suitable for shots other than lobing, in which the shaft 4 bends mainly in the out-of-plane direction.
  • the ratio of the flexural rigidity value EI (3) to the flexural rigidity value EI (2) is preferably 0.90 or less, preferably 0.77 or less. More preferably, 0.70 or less is particularly preferable. From the viewpoint of ease of manufacturing the shaft 4, this ratio is preferably 0.25 or more.
  • the difference (EI (3) -EI (2)) between the flexural rigidity value EI (3) and the flexural rigidity value EI (2) is preferably ⁇ 0.50 Nm 2 or less, and ⁇ 0. 93 Nm 2 or less is more preferable, and -1.10 Nm 2 or less is particularly preferable. From the viewpoint of ease of manufacturing the shaft 4, this difference is preferably ⁇ 3.00 Nm 2 or more.
  • the difference (EI (3) -EI (1)) between the flexural rigidity value EI (3) and the flexural rigidity value EI (1) is preferably ⁇ 0.80 Nm 2 or less, and -1. 50Nm more preferably 2 or less, -1.80Nm 2 or less is particularly preferred. From the viewpoint of ease of manufacturing the shaft 4, this difference is preferably ⁇ 6.00 Nm 2 or more.
  • FIG. 3 shows the first measurement point P1, the second measurement point P2, and the third measurement point P3.
  • the inner diameter Di of the shaft 4 is substantially uniform from the first measurement point P1 to the third measurement point P3.
  • the shaft 4 can be manufactured with a mandrel having a simple shape. In the manufacture of the shaft 4, the prepreg can be easily wound.
  • the shaft 4 may have some variation in the inner diameter Di due to a manufacturing error or the like.
  • the ratio (Di1 / Di2) of the maximum inner diameter Di1 to the minimum inner diameter Di2 from the first measurement point P1 to the third measurement point P3 is preferably 1.10 or less, more preferably 1.05 or less, and 1.03 or less. Is particularly preferable.
  • the ideal ratio (Di1 / Di2) is 1.00.
  • the outer diameter Do of the shaft 4 is substantially uniform from the first measurement point P1 to the third measurement point P3.
  • the shaft 4 can be manufactured with a mandrel having a simple shape. In the manufacture of the shaft 4, the prepreg can be easily wound.
  • the shaft 4 may have some variation in outer diameter Do due to manufacturing error or the like.
  • the ratio (Do1 / Do2) of the maximum outer diameter Do1 to the minimum outer diameter Do2 from the first measurement point P1 to the third measurement point P3 is preferably 1.10 or less, more preferably 1.05 or less. 03 or less is particularly preferable.
  • the ideal ratio (Do1 / Do2) is 1.00.
  • the ratio (W1 / W2) of the mass W1 of the shaft 4 from the first measurement point P1 to the second measurement point P2 and the mass W2 of the shaft 4 from the second measurement point P2 to the third measurement point P3 is 0. It is preferably 95 or more and 1.05 or less. In the shaft 4 in which this ratio is 0.95 or more and 1.05 or less, there is no mass bias. The player can swing the racket 2 having the shaft 4 without discomfort. From this viewpoint, the ratio (W1 / W2) is more preferably 0.97 or more and 1.03 or less, and particularly preferably 0.98 or more and 1.02 or less.
  • Example 1 The badminton racket shown in Fig. 1-6 was manufactured.
  • the flexural rigidity value EI of this racket is shown in Table 1 and FIG. 7 below.
  • Example 2 and 3 and comparative examples The badminton rackets of Examples 2 and 3 and Comparative Example were obtained in the same manner as in Example 1 except that the prepreg configuration was changed.
  • the flexural rigidity EI of these rackets is shown in Table 1 and FIG. 8-10 below.
  • the badminton racket according to the present invention is suitable for a player who makes heavy use of lobing. This racket is also suitable for other styles of players.

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  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Physical Education & Sports Medicine (AREA)
  • Golf Clubs (AREA)
PCT/JP2021/001550 2020-02-18 2021-01-19 バドミントンラケット WO2021166517A1 (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP21757626.3A EP4098334A4 (de) 2020-02-18 2021-01-19 Federballschläger

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2020025154A JP7404920B2 (ja) 2020-02-18 2020-02-18 バドミントンラケット
JP2020-025154 2020-02-18

Publications (1)

Publication Number Publication Date
WO2021166517A1 true WO2021166517A1 (ja) 2021-08-26

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EP (1) EP4098334A4 (de)
JP (1) JP7404920B2 (de)
WO (1) WO2021166517A1 (de)

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH10179811A (ja) * 1996-12-24 1998-07-07 Bridgestone Sports Co Ltd バトミントンラケット
JPH11262545A (ja) * 1998-03-17 1999-09-28 Mizuno Corp バドミントンシャフト
JP2000093559A (ja) * 1998-07-24 2000-04-04 Daiwa Seiko Inc 中実杆を使用したスポ―ツ用杆部材
JP2014045947A (ja) * 2012-08-31 2014-03-17 Globeride Inc バドミントンラケットに用いられるシャフトを製造する方法
CN108310736A (zh) * 2018-04-28 2018-07-24 邬惠林 基于黄金比例的羽毛球拍
CN108853971A (zh) 2018-07-06 2018-11-23 南京胜利体育用品实业有限公司 一种羽毛球拍及其制造方法
CN208465113U (zh) * 2018-07-06 2019-02-05 南京胜利体育用品实业有限公司 一种羽毛球拍
JP2021023724A (ja) * 2019-08-08 2021-02-22 住友ゴム工業株式会社 バドミントンラケットの仕様決定方法及びシャフト挙動の解析方法

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1099302C (zh) * 1997-09-26 2003-01-22 株式会社高纤 羽毛球拍
JP4328380B1 (ja) * 2008-10-09 2009-09-09 株式会社薫風 バドミントンラケット

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH10179811A (ja) * 1996-12-24 1998-07-07 Bridgestone Sports Co Ltd バトミントンラケット
JPH11262545A (ja) * 1998-03-17 1999-09-28 Mizuno Corp バドミントンシャフト
JP2000093559A (ja) * 1998-07-24 2000-04-04 Daiwa Seiko Inc 中実杆を使用したスポ―ツ用杆部材
JP2014045947A (ja) * 2012-08-31 2014-03-17 Globeride Inc バドミントンラケットに用いられるシャフトを製造する方法
CN108310736A (zh) * 2018-04-28 2018-07-24 邬惠林 基于黄金比例的羽毛球拍
CN108853971A (zh) 2018-07-06 2018-11-23 南京胜利体育用品实业有限公司 一种羽毛球拍及其制造方法
CN208465113U (zh) * 2018-07-06 2019-02-05 南京胜利体育用品实业有限公司 一种羽毛球拍
JP2021023724A (ja) * 2019-08-08 2021-02-22 住友ゴム工業株式会社 バドミントンラケットの仕様決定方法及びシャフト挙動の解析方法

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of EP4098334A4

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Publication number Publication date
EP4098334A1 (de) 2022-12-07
EP4098334A4 (de) 2024-02-21
JP7404920B2 (ja) 2023-12-26
JP2021129632A (ja) 2021-09-09

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