EP0898986A2 - Dispositif amortisseur de vibration d'une raquette - Google Patents

Dispositif amortisseur de vibration d'une raquette Download PDF

Info

Publication number
EP0898986A2
EP0898986A2 EP98890242A EP98890242A EP0898986A2 EP 0898986 A2 EP0898986 A2 EP 0898986A2 EP 98890242 A EP98890242 A EP 98890242A EP 98890242 A EP98890242 A EP 98890242A EP 0898986 A2 EP0898986 A2 EP 0898986A2
Authority
EP
European Patent Office
Prior art keywords
racket
weight
handle
damper
damper weight
Prior art date
Legal status (The legal status 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 status listed.)
Granted
Application number
EP98890242A
Other languages
German (de)
English (en)
Other versions
EP0898986B1 (fr
EP0898986A3 (fr
Inventor
Helmut Ing. Umlauft
Herfried Lammer
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Head Sport GmbH
Original Assignee
Head Sport GmbH
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 Head Sport GmbH filed Critical Head Sport GmbH
Publication of EP0898986A2 publication Critical patent/EP0898986A2/fr
Publication of EP0898986A3 publication Critical patent/EP0898986A3/fr
Application granted granted Critical
Publication of EP0898986B1 publication Critical patent/EP0898986B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • A63B60/54—Details or accessories of golf clubs, bats, rackets or the like with means for damping vibrations
    • 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
    • A63B49/02—Frames
    • A63B49/038—Frames with head subframes for replacing strings
    • 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
    • A63B49/02—Frames
    • A63B49/08—Frames with special construction of the handle
    • 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
    • A63B60/002—Resonance frequency related characteristics
    • 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
    • A63B49/02—Frames
    • A63B2049/0201—Frames with defined head dimensions
    • A63B2049/0202—Frames with defined head dimensions surface area
    • 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
    • A63B49/02—Frames
    • A63B2049/0201—Frames with defined head dimensions
    • A63B2049/0203—Frames with defined head dimensions height
    • 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
    • A63B49/02—Frames
    • A63B2049/0201—Frames with defined head dimensions
    • A63B2049/0204—Frames with defined head dimensions width
    • 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
    • A63B49/02—Frames
    • A63B2049/0207—Frames with defined overall length
    • 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
    • A63B49/02—Frames
    • A63B2049/0212—Frames with defined weight
    • 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
    • A63B49/00—Stringed rackets, e.g. for tennis
    • A63B49/02—Frames
    • A63B49/03—Frames characterised by throat sections, i.e. sections or elements between the head and the shaft
    • 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
    • A63B49/02—Frames
    • A63B49/10—Frames made of non-metallic materials, other than wood
    • 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
    • A63B60/06—Handles
    • A63B60/16—Caps; Ferrules

Definitions

  • the invention relates to a device for damping Vibrations of a racket, in particular a tennis racket, Squash rackets or racquetball rackets.
  • Racket frame at frequencies of about 180 to 280 Hz, where this natural frequency is the first mode of a free-free oscillation, where the racket is not clamped.
  • the characteristic of such a free-free oscillation is Circumstance that a maximum amplitude of the vibration on head end and at the handle end as well as in a middle Area is present.
  • the area of the covered area also lies like the end area of the handle facing the covered surface in a vibration node.
  • the arrangement of damping elements leads in the area of the covering whenever this Element placed near a vibration node relative to one little impact and thus a relatively small one Damping.
  • the invention now aims to achieve the lowest possible additional Effective cushioning of rackets with to achieve low weight and a suitable coordination the damping regardless of the choice of strings of the covering and ensure the choice of the covering weight.
  • the training according to the invention essentially in that at or in the handle-side end of the ball racket a damper weight resiliently from the grip axis deflectable is set, the weight with 0.6 to 3.5% of the weight of the stringed racket is selected and the elastic fixing to an at least uniaxial deflection designed with a natural frequency between 100 and 300 Hz or is dimensioned. Because only a very small Weight, the dimensioning of between 0.6 to 3.5% of the weight of the strung racket must be selected, available, changed the characteristics of the racket hardly and in particular it can ensure that a top-heavy racket without additional weights in the head area for a total light weight can be manufactured.
  • this relatively light damper weight is elastic in a way it is stipulated that an at least uniaxial deflection with a natural frequency between 100 and 300 Hz is achieved and in that the relatively low damper weight on the handle side At the end of the racket, vibrations succeed almost extinguished by interference, without this for that Total weight of the ball racket must be increased significantly.
  • the relatively light racket reacts after being excited the ball contact almost undamped with its natural frequency, being the damper on the same shock with its natural frequency responds.
  • the extent of damping the vibration of the damping weight in the elastic setting is for the effect of Damping almost without influence here, since the two vibrations, namely the vibration of the racket and the vibration of the Damping weight are coupled together.
  • the training according to the invention is so hit that the handle-side damper weight biaxial elastic can be deflected and pivoted elastically around the handle axis is set, with such a biaxial elastic Usually deflection due to the inertia of the mass the damper weight also dampens vibrations around the Handle axis successful. If the excitation is off-center The frame weight remains due to the damper weight Mass inertia initially in its original position and will subsequently due to the elastic deformation of the fixing a rotational vibration excited, which the vibration of the Counteracts racket frame around the longitudinal axis of the handle.
  • the damper weight is advantageously between 3 and 10 g, preferably about 5 g. Taking into account the beginning mentioned club weights of 180 to 250 g in modern Tennis rackets and slightly lower weights for squash rackets is thus with an extremely small damper weight found enough.
  • the arrangement of the damper weight is preferably carried out in a cavity at the end of the handle, preferably the Damper weight is arranged in an elastic carrier, which at least two each other with respect to the handle axis diametrically opposite points on the wall of the cavity is supported.
  • an elastic support can be more simple Way made of elastomeric material, especially silicone rubber exist, the carrier in the manner of a carrier of the same strength has a cross section which is in the axis view of the handle starting from the damper weight to the Walls of the cavity enlarged. That way, too the elastic support requires an extremely small component, which itself in turn to the smallest possible extent to the total mass of the racket.
  • the natural frequency of the Vibration of the damper weight depends on the rigidity and from the crowd.
  • the stiffness of the elastic support can hiebei by compression or the type of clamping of the carrier and the shape of the wearer can be influenced. Usually is the stiffness of the damper from the bending stiffness of the elastomer decisively influenced.
  • the measurement of the natural frequency The damper is relatively difficult to measure because it is extremely difficult small accelerometers must be measured. A good However, approximation results from the arithmetical determination the natural frequency with knowledge of the material for the elastomer and the shape of the wearer with simultaneous knowledge the mass of the vibration damper.
  • the Natural frequency of the vibration of the damper weight by choosing the Stiffness and / or compression of the carrier and choice of Mass of the weight set to a frequency which the Frequency of the free-vibration of the first order of the racket corresponds.
  • this is to be achieved an optimal damping with low weight the arrangement so that the damper weight and especially the Focus of the damper weight in the area of the antinode and especially those normal to the axis of the handle Level, which is from the antinode of the free-free vibration first order of the ball racket is penetrated at the end of the handle is arranged.
  • the amplitude of the damper required for damping is proportional to the ratio of the stiffness of the racket to the Stiffness of the damper. The lighter the racket gets, the more larger amplitudes must be allowed for the damper and it is therefore advantageously designed so that the Vibration amplitude of the damper weight proportional to that Ratio of the stiffness of the racket to the stiffness of the Carrier with a lower club weight larger than with a higher one Racket weight is selected.
  • Another characteristic measure of the effect of the damper represents the so-called enlargement function.
  • This enlargement function is defined as the amplitude of the racket by the Excitation amplitude. If this ratio between the natural frequency of the damper and the natural frequency of the racket values assumes less than 1, a particularly sustainable damping of the Overall system reached. The training is therefore advantageous hit that the ratio between amplitude of the ball racket and excitation amplitude in the range between the natural frequency the damper weight and the natural frequency of the ball racket less than 1 is selected.
  • a particularly effective cushioning with low weights can be achieved in that the weight of the storage of the damping element at most 30%, preferably at most 25% the damper weight. In this way, the Influence of the bearing on the vibration behavior of the damper weight minimize and a particularly weight-saving, effective Realize damping through interference.
  • FIG. 1 shows a plan view of a racket
  • FIG. 2 a side view in the direction of arrow II of FIG. 1 with the schematic representation of the free-free natural frequency first Order
  • Fig. 3 is a view in the direction of arrow III
  • Fig. 4 is an analog view 3 with a schematic arrangement of a biaxial elastically suspended damper weight.
  • a tennis racket 1 is shown, the string oval is designated by 2.
  • the tennis racket 1 has one Handle 3, the axial height of which is designated a.
  • the axis the handle or the tennis racket is designated by 4.
  • a damper 5 is arranged, whose axial height b is less than 1/10 of the axial Length a of the handle part 3 extends.
  • the vibration node 7 this First order free-free vibrations penetrate the fabric oval 2 and the handle part 3, whereas the maximum amplitudes c in the area of the antinode at the head end End and at the handle end of the racquet 1 and at the selected display just below the cover oval 2 are available.
  • the damping device 5 is corresponding in the view of arrow III of FIG. 1 can be seen.
  • the damping device 5 consists of a carrier and a damping weight 8, the damper weight 8 being elastic between the supports 9 is held deflectable.
  • the type of clamping as shown in Fig. 3 is a multi-axis deflection. The deflection can thus both in the direction of the double arrow 10 and transversely to do this in the direction of the double arrow 11, always when eccentric impacts on the fabric oval Racket frame stimulates a torsional vibration, a corresponding elastic torsional vibration of the mass of the damper weight 8 is also permitted.
  • the type of elastic suspension is schematic in FIG. 4 shown, here a two-axis suspension via springs 12 is provided.
  • a two-axis suspension via springs 12 is provided.

Landscapes

  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Physical Education & Sports Medicine (AREA)
  • Vibration Prevention Devices (AREA)
  • Fluid-Damping Devices (AREA)
  • Golf Clubs (AREA)
EP98890242A 1997-08-28 1998-08-19 Dispositif amortisseur de vibration d'une raquette Expired - Lifetime EP0898986B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
AT145097 1997-08-28
AT1450/97 1997-08-28
AT0145097A AT408724B (de) 1997-08-28 1997-08-28 Einrichtung zum dämpfen von vibrationen eines ballschlägers

Publications (3)

Publication Number Publication Date
EP0898986A2 true EP0898986A2 (fr) 1999-03-03
EP0898986A3 EP0898986A3 (fr) 1999-03-31
EP0898986B1 EP0898986B1 (fr) 2002-12-18

Family

ID=3514163

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98890242A Expired - Lifetime EP0898986B1 (fr) 1997-08-28 1998-08-19 Dispositif amortisseur de vibration d'une raquette

Country Status (4)

Country Link
EP (1) EP0898986B1 (fr)
AT (2) AT408724B (fr)
CA (1) CA2246104C (fr)
DE (1) DE59806693D1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7967706B2 (en) 2006-02-02 2011-06-28 Head Technology Gmbh Racket for ball games

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102006004849B4 (de) * 2006-02-02 2008-01-03 Head Technology Gmbh Ballspielschläger mit Schwingungseinrichtung

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5651545A (en) 1995-06-07 1997-07-29 Roush Anatrol, Inc. Vibration damping device for stringed racquets

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3941380A (en) * 1972-07-31 1976-03-02 Patentex S.A. Tennis rackets and similar implements with vibration damper
DE3704121A1 (de) * 1986-02-19 1987-08-20 Nippon Musical Instruments Mfg Schwingungsabsorber fuer ein rakett
JP2521514B2 (ja) * 1988-04-12 1996-08-07 株式会社シーゲル 打球用運動具
JPH0755239B2 (ja) * 1989-07-18 1995-06-14 鈴木総業株式会社 打球用運動具
JPH04263876A (ja) * 1991-02-18 1992-09-18 Toray Ind Inc グリップエンド、それを装着したスポーツ用具、自転車および工具
JP2853926B2 (ja) * 1991-09-24 1999-02-03 東レ株式会社 衝撃振動吸収部材およびそれを用いてなるスポーツ用具のグリップエンド、工具のグリップエンドならびに二輪車のグリップエンド
US5935027A (en) * 1995-12-28 1999-08-10 Roush Anatrol, Inc. Multi-mode vibration absorbing device for implements

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5651545A (en) 1995-06-07 1997-07-29 Roush Anatrol, Inc. Vibration damping device for stringed racquets

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7967706B2 (en) 2006-02-02 2011-06-28 Head Technology Gmbh Racket for ball games

Also Published As

Publication number Publication date
CA2246104A1 (fr) 1999-02-28
DE59806693D1 (de) 2003-01-30
CA2246104C (fr) 2005-10-11
EP0898986B1 (fr) 2002-12-18
ATA145097A (de) 2001-07-15
ATE229830T1 (de) 2003-01-15
AT408724B (de) 2002-02-25
EP0898986A3 (fr) 1999-03-31

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