EP0443001B1 - Raquette, en particulier raquette de tennis - Google Patents

Raquette, en particulier raquette de tennis Download PDF

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Publication number
EP0443001B1
EP0443001B1 EP90913398A EP90913398A EP0443001B1 EP 0443001 B1 EP0443001 B1 EP 0443001B1 EP 90913398 A EP90913398 A EP 90913398A EP 90913398 A EP90913398 A EP 90913398A EP 0443001 B1 EP0443001 B1 EP 0443001B1
Authority
EP
European Patent Office
Prior art keywords
racquet
area
height
cross
core region
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.)
Expired - Lifetime
Application number
EP90913398A
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German (de)
English (en)
Other versions
EP0443001A1 (fr
Inventor
Helmut Umlauft
Karl-Heinz Wäger
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 EP0443001A1 publication Critical patent/EP0443001A1/fr
Application granted granted Critical
Publication of EP0443001B1 publication Critical patent/EP0443001B1/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
    • A63B49/00—Stringed rackets, e.g. for tennis
    • A63B49/02—Frames
    • 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
    • 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
    • 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
    • A63B2049/0211—Frames with variable thickness of the head in a direction perpendicular to the string plane
    • 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
    • A63B2049/0217—Frames with variable thickness of the head in the string plane

Definitions

  • the invention relates to a ball racket, in particular tennis racket, with a grip part and a tensioning frame for strings connected via a heart zone, in which the cross-sectional height of the tensioning frame measured at right angles to the covering has at least a greatest height.
  • a tennis racket of the type mentioned at the outset can be found, for example, in EP-A 176 021.
  • the width of the frame bars increases from the grip part to a central area of the covering oval and in turn decreases towards the racket head.
  • This known embodiment should serve to approximately adapt the resonance frequency of the strung racket attached to the handle to the time period in which the ball remains in contact with the covering.
  • a major problem in the construction of a racket is the fact that unwanted vibrations are to be kept away from the grip part and thus from the hand or arm of the player. If such undesirable vibrations can be avoided, it is then possible to control the vibration in the grip area.
  • the aim of racket constructions is mostly to create rackets which are as light as possible and which are low in the direction transverse to the cross-sectional plane of the clothing, although the racket as a whole becomes softer and the avoidance of vibrations is insufficient.
  • the invention now aims to provide a ball racket of the type mentioned in the introduction, in which better control of the vibrations in the grip area is made possible even in the case of a racket frame of light construction and of a low frame height.
  • the construction of the ball racket according to the invention essentially consists in that the cross-sectional height of the frame spars or the tensioning frame in the area of the heart zone and in the area of the racket head facing away from the handle end is greater than in the intermediate area of the tensioning frame, the cross-sectional height in the area facing away from the handle end of the club head is larger than the cross-sectional height in the heart zone.
  • these areas can also be designed to be more resistant to bending by other measures.
  • the more rigid design of these areas is only limited by the increasing weight in the case of more rigid inserts.
  • the fact that the frame height in the club head is now larger than in the area of the centerpiece enables a linearization of the dependence of the deflection of the club on the distance from the grip area while simultaneously reducing the vibrating masses in the area of the centerpiece.
  • the design is advantageously made such that the change in the deflection over the length of the racket is less than 0.5 mm, in particular less than 0.3 mm, the deflection being between 0.4 mm and 0.9 mm, preferably between 0 , 5 mm and 0.8 mm, is under the test conditions according to HSTM standard 197-A.
  • the construction according to the invention is advantageously made such that the frame spars have a largely constant cross-sectional height in the area of the heart zone.
  • Such a design makes it possible to ensure a high degree of stiffening with a relatively small increase in cross-section in the area of the softer area in the heart area, without a large increase in mass being required in the heart area.
  • the optimum of the desired damping properties results if the training, as in a preferred further development, is such that the stiffness of the individual subareas from the club handle to the club head is set such that the deflection at a given load is essentially linear with the distance increases from a clamping point in the grip area.
  • the appropriate design with regard to the desired rigidity and the desired weight distribution can be varied by choosing suitable materials.
  • fiber-reinforced for example carbon-fiber-reinforced, hollow spars
  • the setting of the Weight can be adjusted by varying the fiber content in the material used for the spar or by using weight-increasing inserts.
  • the percentage increase in the cross-sectional height in the region of the racket head facing away from the handle end and in the region of the heart zone is chosen to be substantially linear with the percentage increase in the covered area of the ball racket, the percentage increase in height depending on the covering area of the ball racket in the area of the racket head facing away from the handle end is greater than the percentage increase in height in the area of the heart zone.
  • the design is advantageously made such that the sweet spot lies in the area of a lower, substantially constant cross-sectional height of the frame spars, with the propagation of undesired vibrations in the handle area in a particularly simple manner It can be prevented that the weight of the spars per unit length in the area of the club head is greater than the weight of the spars per unit length in the area of the heart zone.
  • the desired linearization of the dependence of the deflection on the distance from the handle must lead to different cross-sectional increases depending on the respective covered area, the design advantageously being such that the height in the area of the heart zone around 16 for covered areas between 600 and 720 cm2 up to 24%, preferably about 20%, and the height in the area of the club head facing away from the handle end is greater by 20 to 44%, preferably about 30%, than the height of the spars in the area of the club head and heart zone facing away from the handle end Area of the stenter.
  • the design is advantageously made such that the weight of the bars per unit length in the area of the heart zone is less than or equal to the weight of the bars per unit length between the heart zone and the is the area of the club head facing away from the handle end.
  • FIG. 1 shows a top view of a tennis racket frame
  • Fig. 2 deflection characteristics, which were measured on such clubs
  • 3 shows a side view of a racket according to the invention
  • Figures 4, 5 and 6 are sections along lines IV-IV, V-V and VI-VI of Fig. 3
  • FIG. 7 shows a schematic representation of the mass distribution of a racket according to the invention.
  • 1 is formed from frame bars 1, which initially delimit a centerpiece 2 and are bent with a greater curvature in the area of the club head 3 facing away from the handle end. Also in the area of the centerpiece 2, the spars delimiting the covering oval are more curved in the partial area 4. 1 zones are entered in millimeters, each with in Fig. 2 below the deflection values correspond.
  • the bending tests were carried out in accordance with HSTM standard 197-A in such a way that a rigid support for the racket frame was formed at a distance of 50 mm to the left and right of the measured zone and the respective deflection value by loading the corresponding zone with a predetermined force of 1000 N is measured.
  • the bending behavior of ball racquets is measured in several zones using a lower support consisting of a 2-beam support with a 150 mm beam spacing and an upper support designed as a beam punch with the same diameter.
  • Test support diameter of 38 mm can be selected and a division into seven zones is made for tennis rackets.
  • the testing machine is set for pressure testing.
  • curve 5 corresponds to a conventional racket without modifications according to the invention, with a different deflection in individual zones being clearly observed over the axial length of the racket.
  • the relative constancy of the measured values between zones 150 and 250 and the marked rapid decrease in strength in the area of the club head are particularly pronounced.
  • Curve 5 for deflections for conventional rackets has areas of widely varying extent in wide absolute areas of deflection.
  • the dashed lines 7a, 7b, 7c are measured on the basis of measured values of rackets of different sizes according to the invention and make it clear that the bending properties are almost uniform over the axial length in a narrow range of 0.25 mm. These bending properties result from a construction as shown in FIG. 3.
  • the curve 7a is for clubs with a face of 720 cm2, curve 7b measured for 660 cm2 and 7c for 600 cm2.
  • the cross-sectional height b of which is selected in the area of the racket head 3 to be approximately 30% greater than the height a in the adjoining area.
  • the height b is chosen to be larger on the covering level of the frame spars 1 in the area of the centerpiece 2.
  • the handle part of the racket is designated 8.
  • FIGS. 4, 5 and 6 The respective cross-sectional shapes of the frame spar are shown in more detail in FIGS. 4, 5 and 6, with depending on the area covered to achieve largely linear or uniform deflection behavior in a narrow range, for example cross-sectional heights according to the following table are used:
  • the cross-sectional height b in the area of the heart zone is generally in each case above the grip strength measured in the same direction.
  • FIG. 7 schematically shows the mass distribution of a racket, the extent of the hatched area in each case representing a measure of the mass in the respective racket area.
  • areas 10 with greater mass per unit length are provided symmetrically to the longitudinal axis, which are formed by a correspondingly multilayered design of the frame spars and / or the arrangement of Additional weights in the area of the increased cross-sectional height can be achieved.
  • areas 11 with greater mass per unit length are provided at the transition from the heart zone 2 to the covering oval in order to achieve the desired vibration and deflection behavior.
  • the weight per unit length in the head region 3 is chosen to be greater than in the heart zone 2 and maximum stiffness is to be achieved in the head region with a high overall height c and high stiffness with a weight reduction in the heart zone 2 with a high cross-sectional height b. Due to the stiffening in the head area and in the heart zone, the areas weakened by the roundings are specifically reinforced and thus the largely linear and, above all, uniform course of the deflection shown in FIG. 2 in a narrow area between 0.5 mm and 0.8 mm obtained depending on the distance from the handle part.

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  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Physical Education & Sports Medicine (AREA)
  • Pulmonology (AREA)
  • Golf Clubs (AREA)
  • Floor Finish (AREA)
  • Laminated Bodies (AREA)
  • Compositions Of Macromolecular Compounds (AREA)
  • Pivots And Pivotal Connections (AREA)

Claims (11)

  1. Raquette pour jeu de balle, notamment raquette de tennis, comprenant une partie poignée (8) et un cadre de tamis destiné à être encordé reliés par l'intermédiaire d'une zone de coeur (2), dans laquelle la hauteur de section du cadre, mesurée transversalement au tamis, possède au moins une hauteur maximum, caractérisée en ce que la hauteur de section (a,b,c) des montants (1) du cadre, ou du cadre dans la région de la zone de coeur (2), ainsi que dans la région de la tête (3) de la raquette qui est éloignée de l'extrémité (8) côté poignée, est plus grande que dans la région intermédiaire du cadre, la hauteur de section (c) dans la région de la tête (3) de la raquette qui est éloignée de l'extrémité (8) côté poignée étant plus grande que la hauteur de section (b) dans la zone de coeur.
  2. Raquette pour jeu de balle selon la revendication 1, caractérisée en ce que la raquette est de constitution plus rigide à la flexion dans les régions de plus grande hauteur de section (b,c).
  3. Raquette pour jeu de balle selon la revendication 1 ou 2, caractérisée en ce que les montants (1) du cadre présentent une hauteur de section (b) sensiblement constante dans la région de la zone de coeur (2).
  4. Raquette pour jeu de balle selon la revendication 1, 2 ou 3, caractérisée en ce que la rigidité des régions partielles élémentaires, depuis la poignée (8) de la raquette jusqu'à la tête (3) de la raquette, est établie de manière que, pour une charge prédéterminée, la flèche croisse en fonction sensiblement linéaire de la distance mesurée à partir d'une zone d'encastrement dans la région de poignée (8).
  5. Raquette pour jeu de balle selon une des revendications 1 à 4, caractérisée en ce que la variation de la flèche sur la longueur de la raquette est inférieure à 0,5 mm, notamment inférieure à 0,3 mm, la flèche étant comprise entre 0,4mm et 0,9mm, de préférence entre 0,5mm et 0,8mm, dans les conditions d'essai de la norme HSTM 197-A.
  6. Raquette pour jeu de balle selon une des revendications 1 à 5, caractérisée en ce que le pourcentage d'accroissement de la hauteur de section (b,c) dans la région de la tête (3) de la raquette qui est éloignée de l'extrémité (8) côté poignée, et dans la région de la zone de coeur (2), est choisi en fonction sensiblement linéaire du pourcentage d'accroissement de la surface du tamils de la raquette, le pourcentage d'accroissement de la hauteur en fonction de la surface du tamis de la raquette étant choisi plus grand dans la région de la tête (3) de la raquette qui est éloignée de l'extrémité (8) côté poignée que le pourcentage d'accroissement de la hauteur dans la région de la zone de coeur (2).
  7. Raquette pour jeu de balle selon une des revendications 1 à 6, caractérisée en ce que le "sweetspot" (point mou) se trouve dans la région de hauteur de section (a), faible et sensiblement constante, des montants (1) du cadre.
  8. Raquette pour jeu de balle selon une des revendications 1 à 7, caractérisée en ce que le poids par unité de longueur des montants (1) est plus grand dans la région de la tête (3) de la raquette que le poids par unité de longueur des montants (1) dans la région de la zone de coeur (2).
  9. Raquette pour jeu de balle selon une des revendications 1 à 8, caractérisée en ce que des régions de poids maximum par unité de longueur prévues dans la région de la tête (3) de la raquette qui est éloignée de l'extrémité (8) côté poignée et/ou dans la transition allant de la zone de coeur (2) à l'ovale du tamis sont disposées en dehors de l'axe longitudinal de la raquette et symétriquement par rapport à cet axe.
  10. Raquette pour jeu de balle selon une des revendications 1 à 9, caractérisée en ce que, pour des surfaces de tamis d'entre 600 à 720 cm², la hauteur dans la région de la zone de coeur (2) est supérieure de 16 à 24%, de préférence de 20%, et la hauteur dans la région de la tête (3) de la raquette qui est éloignée de l'extrémité (8) du côté poignée est supérieure de 20 à 44%, de préférence d'environ 30%, à la hauteur des montants (1) dans la région du cadre comprise entre la tête (3) de la raquette éloignée de l'extrémité (8) côté poignée et la zone de coeur (2).
  11. Raquette pour jeu de balle selon une des revendications 1 à 10, caractérisée en ce que le poids par unité de longueur des montants (1) dans la région de la zone de coeur (2) est inférieur ou égal au poids par unité de longueur des montants (1) entre la zone de coeur (2) et la région de la tête (3) de la raquette qui est éloignée de l'extrémité (8) côté poignée.
EP90913398A 1989-09-11 1990-09-11 Raquette, en particulier raquette de tennis Expired - Lifetime EP0443001B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT2123/89 1989-09-11
AT0212389A AT393967B (de) 1989-09-11 1989-09-11 Ballschlaeger, insbesondere tennisschlaeger

Publications (2)

Publication Number Publication Date
EP0443001A1 EP0443001A1 (fr) 1991-08-28
EP0443001B1 true EP0443001B1 (fr) 1993-06-09

Family

ID=3528268

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90913398A Expired - Lifetime EP0443001B1 (fr) 1989-09-11 1990-09-11 Raquette, en particulier raquette de tennis

Country Status (6)

Country Link
US (1) US5183265A (fr)
EP (1) EP0443001B1 (fr)
JP (1) JP2554399B2 (fr)
AT (2) AT393967B (fr)
CA (1) CA2042039A1 (fr)
WO (1) WO1991003283A1 (fr)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5312102A (en) * 1993-02-04 1994-05-17 Lisco, Inc. Variable inertia head racket
US5762571A (en) * 1993-08-05 1998-06-09 Degaris; Kenneth Godfrey Ultra thin racquet frame
EP0676222B1 (fr) * 1994-04-11 2000-06-28 Wavex Corporation Raquette avec cadre inégal
US5470061A (en) * 1994-06-28 1995-11-28 Ektelon Racquetball racquet having increased stiffness at tip
US6383099B1 (en) * 1995-05-22 2002-05-07 Wilson Sporting Goods Co. Tennis racquet
US5913740A (en) * 1997-07-25 1999-06-22 Miklos; Edward J. Flat beam aerodynamic tennis racquet
US6062994A (en) * 1998-04-10 2000-05-16 Ef Composite Technologies, L.P. Reinforced racquet with flat string bed
US6447412B1 (en) 2000-04-18 2002-09-10 Ef Composite Technologies, L.P. Sports racket with undulations in frame interior surface
JP6163352B2 (ja) * 2013-05-23 2017-07-12 ヨネックス株式会社 バトミントンラケット
DE202021002644U1 (de) 2021-08-11 2021-09-21 Head Technology Gmbh Ballspielschlägerrahmen mit verbesserter Torsion
DE102021004130B3 (de) 2021-08-11 2022-08-11 Head Technology Gmbh Ballspielschlägerrahmen mit verbesserter Torsion

Family Cites Families (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1539019A (en) * 1924-02-07 1925-05-26 John P Nikonow Tennis racket
DE574556C (de) * 1932-06-16 1933-04-18 Schloemann Akt Ges Haspel mit umlaufender Innentrommel zur Erzeugung von wassergehaertetem Draht
ZA72651B (en) * 1971-04-15 1972-10-25 Morgan Construction Co Coil forming and packaging
DE2751171A1 (de) * 1977-11-16 1979-05-17 Reppert Ruediger Lothar Von Di Schlaeger fuer ballspiele mit erhoehter schwung- und schlagkraft
US4280699A (en) * 1980-01-25 1981-07-28 Leach Industries Game racquet
DE3103671C2 (de) * 1981-02-04 1984-05-24 SMS Schloemann-Siemag AG, 4000 Düsseldorf Vorrichtung zum Aufwickeln und Abkühlen von Walzdraht
ZA852092B (en) * 1984-07-31 1985-11-27 Cons Sporting Goods Tapered racquet
NL8402817A (nl) * 1984-09-14 1986-04-01 Pols Erik Bernard Van Der Tennisracket.
DE8427999U1 (de) * 1984-09-22 1987-03-26 Kuebler, Siegfried, 7770 Überlingen Schläger für Spiele mit begrenzt elastischem Ball
FR2592804B1 (fr) * 1986-01-13 1989-04-07 Rossignol Sa Raquette de tennis en materiau stratifie
US4768786A (en) * 1986-10-17 1988-09-06 Siegfried Kuebler Tennis racket
GB2208356B (en) * 1987-08-04 1991-08-07 Wilson Sporting Goods Tennis racket
JPH0429624Y2 (fr) * 1987-11-17 1992-07-17
JPH0429621Y2 (fr) * 1988-01-23 1992-07-17
US5037098A (en) * 1988-04-06 1991-08-06 Prince Manufacturing, Inc. Tennis racquet with tapered profile frame
FR2630336B1 (fr) * 1988-04-26 1990-07-13 Rossignol Sa Raquette de tennis
US4997186A (en) * 1989-12-08 1991-03-05 Ferrari Importing Company, Inc. Racket frame having multi-dimensional cross-sectional construction

Also Published As

Publication number Publication date
JPH04501820A (ja) 1992-04-02
AT393967B (de) 1992-01-10
US5183265A (en) 1993-02-02
CA2042039A1 (fr) 1991-03-12
ATE90218T1 (de) 1993-06-15
ATA212389A (de) 1991-07-15
WO1991003283A1 (fr) 1991-03-21
JP2554399B2 (ja) 1996-11-13
EP0443001A1 (fr) 1991-08-28

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