EP2138207B1 - Batteur de jeux de balle - Google Patents

Batteur de jeux de balle Download PDF

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Publication number
EP2138207B1
EP2138207B1 EP08011711A EP08011711A EP2138207B1 EP 2138207 B1 EP2138207 B1 EP 2138207B1 EP 08011711 A EP08011711 A EP 08011711A EP 08011711 A EP08011711 A EP 08011711A EP 2138207 B1 EP2138207 B1 EP 2138207B1
Authority
EP
European Patent Office
Prior art keywords
racket
shaft
ball game
depressions
cross
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.)
Not-in-force
Application number
EP08011711A
Other languages
German (de)
English (en)
Other versions
EP2138207A1 (fr
Inventor
Jürgen Wilke
Gert Rhomberg
Ralf Schwenger
Caroline Gillet
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 Technology GmbH
Original Assignee
Head Technology 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 Technology GmbH filed Critical Head Technology GmbH
Priority to ES08011711T priority Critical patent/ES2379406T3/es
Priority to AT08011711T priority patent/ATE539802T1/de
Priority to EP08011711A priority patent/EP2138207B1/fr
Publication of EP2138207A1 publication Critical patent/EP2138207A1/fr
Application granted granted Critical
Publication of EP2138207B1 publication Critical patent/EP2138207B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • A63B60/00—Details or accessories of golf clubs, bats, rackets or the like
    • A63B60/48—Details or accessories of golf clubs, bats, rackets or the like with corrugated cross-section
    • 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
    • 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
    • A63B2102/06—Squash
    • 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
    • A63B49/12—Frames made of metal
    • 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

Definitions

  • the present invention relates to an improved ball game racket, in particular a tennis, squash, racquetball, badminton or paddle tennis racket.
  • Such clubs usually have a frame with a head portion and a club shaft. At the end of the club shaft is usually provided a handle portion for holding the racket. Depending on the use, the club head may be solid or suitable for receiving a clothing.
  • the choice of material for the racquet frame is crucial.
  • the geometry of the racket or of the racket frame is of enormous importance, since with the help of these targeted influence on the bending and torsion properties of the racket can be taken.
  • the club shafts or have substantially curved around its entire circumference cross-sectional profiles.
  • the present invention provides a ball game racket, in particular a tennis, squash, racquetball, badminton or paddle tennis racket, having a club head and a club shaft, the club shaft having a substantially cross-sectional profile curved about its entire circumference, in which a plurality are longitudinal the club shaft extending indentations are provided.
  • the curved cross-sectional profile is to be understood that the club shaft without the indentations has a curved around its entire circumference profile, namely oval.
  • this curved cross-sectional profile in addition to the inherent curvature, a plurality of indentations extending in the longitudinal direction of the club shaft are formed.
  • the invention here are oval cross-sectional profiles of the club shaft.
  • the club shaft has two arms and the indentations extending in the longitudinal direction of the club shaft extend around the curved cross-sectional profile of the two arms.
  • said properties of the stem are to be understood as referring either to a one-piece stem or to the two arms of a two-piece stem.
  • the oval cross-sectional profiles of the club shaft in the case of a two-part shaft are to be understood so that the two arms of the shaft have an oval cross-sectional profile.
  • a club shaft with an oval cross-sectional profile is considered in which a plurality of extending in the longitudinal direction of the club shaft indentations are provided, since such a club shaft has a relatively high bending stability or flexural rigidity with simultaneous torsional softness.
  • a Torsionsflexzone is created in the club shaft, so that no or only insignificant torsional deformations occur in the clubface.
  • a soft area is provided in the racket shaft, in which torsional stresses can be selectively reduced, avoiding that the striking surface is affected by torsional deformations.
  • the bending stiffness of the club shaft is sufficiently large, so that a high momentum transfer can be achieved on the club head and a sufficient resistance to breakage is provided.
  • the oval cross-sectional profile is arranged so that the longer axis of the oval extends in a direction substantially perpendicular to a clothing plane of the racket and the shorter axis of the oval in a direction substantially in or parallel to the clothing plane of the racket.
  • the ratio of the longer axis of the oval to the shorter axis of the oval is preferably in the range between 1 and 2.5, preferably between 1.1 and 2 and particularly preferably between 1.2 and 1.5. Too large ratios between the long axis and the short axis can have a negative effect on the bending stiffness, so that generally oval cross-sectional profiles are preferred, which do not deviate too much from a circular cross-sectional profile.
  • the recesses are provided around the circumference of the club shaft substantially equally spaced from each other. Alternatively, however, an uneven or asymmetrical arrangement of the recesses may be provided around the circumference of the club shaft.
  • the racket shaft of the example racket according to the invention has at least four indentations on the racket shaft. It is particularly preferred to provide at least six indentations, and most preferably, at least eight indentations on the club shaft. While an even number of indentations may be advantageous for reasons of symmetry, an odd number of indentations (eg, at least five indentations) nonetheless fall within the scope of the present invention.
  • all indentations are formed substantially the same. Alternatively, however, several indentations may differ from each other. For example, indentations of different lengths or different depths can be provided. Alternatively or additionally, the different indentations may have a different cross section. It indentations are preferred, which are formed in the cross-sectional direction substantially U-shaped or semicircular. However, it is also possible for some or all indentations to have a different shape and, for example, to be V-shaped.
  • each indentation may be constant along the length of the indentation or vary over the length. It is particularly preferred that at least some of the recesses have transition sections in which the indentations are gradually deeper from the otherwise substantially circumferentially curved cross-sectional profile. These transition sections are preferably provided on a striker head-side section of the shaft and / or on a grip-side section of the shaft. In the transition sections, the profile preferably increases or decreases in depth, either continuously or continuously.
  • the indentations are formed substantially only in an area between the club head and the grip portion. Alternatively, however, some or all indentations can extend into the grip section and / or pass into an area of the club head.
  • the recesses preferably have a length of 60 mm to 150 mm, more preferably from 80 mm to 120 mm, and / or a width of 2 mm to 8 mm, particularly preferably from 3 mm to 6 mm, and / or a depth of 0 , 5 mm to 5 mm, more preferably from 1 mm to 3 mm.
  • FIG. 1 shows a front view of a ball game racket according to the invention in the form of a squash racket 1 with a club head 2 and a club shaft 3, which has a handle portion 4 and a arranged between club head 2 and handle portion 4 section 5.
  • a plurality of recesses 6 extending in the longitudinal direction of the club shaft 3 are shown.
  • the recesses 6 are formed substantially equal and arranged uniformly spaced from each other around the circumference of the club shaft.
  • the club shaft 3 of the squash racket according to the invention opposite transition portions 7a and 7b, in which the indentation in each case gradually from the otherwise substantially curved around the entire circumference cross-sectional profile.
  • FIG. 5 The cross-sectional profile of the in the FIGS. 1 to 4 shown racket is in FIG. 5 to see schematically.
  • the cross-sectional profile of the club shaft 5 of a racket according to the invention is compared with the oval cross-sectional profile of a racket shaft 5a of a conventional racket. How out FIG. 5 becomes apparent, corresponds to the Heavy line of the cross section of a club shaft according to the invention essentially an oval.
  • the cross-sectional profile of the club shaft 5 according to the invention can be understood such that additional indentations 6 are formed in a substantially oval cross-sectional profile. Only in these recesses 6, the cross-sectional profile deviates from an oval cross-sectional profile.
  • FIG. 5 profile shown is merely exemplary understood.
  • the cross-sectional profile without indentations may be generally curved.
  • the recesses 6 formed therein can be formed, for example, wider or deeper than in FIG. 5 is shown. Alternatively, a different number of recesses is conceivable.
  • the shape of the indentations in FIG. 6 may be formed relatively flat, may be clearly U-shaped or semicircular. Even if curved indentations are preferred, an example V-shaped shape of the indentations is also possible.
  • a racket shaft with a substantially curved over its entire circumference cross-sectional profile, in which a plurality of extending in the longitudinal direction of the racket shaft recesses are provided, proves to be particularly advantageous.
  • FIG. 6c illustrated cross-sectional profile, which is used in a known Prince bat (Prince Air Drive 140) compared.
  • the boundary conditions were set so that the club shaft could oscillate freely at both ends.
  • the normal modes were calculated for the first bending vibration (that is, in the racket plane), for the second bending vibration (that is, perpendicular to the racket plane), and for the first torsional vibration.
  • the natural frequencies of the corresponding normal modes for the three shaft geometries are shown in the following table: shaft geometry Dimensions 1. bending mode (in racket level) 2. Bending mode (perpendicular to the racket plane) 1.Torsionsmode Conventional shaft ( Fig.
  • the natural frequency of the first torsional vibration in the case of a club shaft according to the invention is about 30% lower than a shaft with an oval cross-section.
  • the club stock according to the invention is significantly torsion-softer than a conventional club stock.
  • the natural frequency of the first bending vibration is only slightly lower and that of the second bending vibration is even higher than the corresponding natural frequencies of a conventional club shaft with an oval cross-section.
  • a racket with a racket shaft according to the invention is substantially as stable with respect to bends as a conventional racket.
  • the second bending vibration which is essential for momentum transfer, a club according to the invention surprisingly behaves stiffer than a conventional club.
  • the Prince bat with his in FIG. 6c Although also shown deviating from an oval cross-sectional profile also has a significantly reduced Torsionseigenfrequenz of 5003 Hz, but has the disadvantage that at the same time the natural frequencies of the first and second bending vibration are also drastically reduced. Accordingly, the well-known Prince bat is indeed very torsionally soft, but at the same time also flexible soft what can be detrimental. In particular, in the plane perpendicular to the racket plane, the shaft of the Prince racket is about 20% more flexible than the bow shaft according to the invention. As a result, the momentum transfer from the club head to the ball upon impact of the ball on the club head is significantly affected, since the club head cushions on impact due to bending softness and thus a part of the impact force is consumed for deformation of the racket.
  • a racket with a club shaft according to the invention has the extraordinary property of having on the one hand a shaft with a torticeflex zone, on the other hand the shaft being essentially at least as flexurally stable as a conventional racket.
  • This combination was described by test players, especially squash players, as particularly pleasant. This can probably be explained by the fact that the provision of a Torsionsflexzone in the racket shaft is avoided that the club head and thus the striking surface significantly curved or distorted. This allows improved ball control and thus generally better playability of the racket according to the invention.
  • FIG. 9 a tennis racket 1 is shown in accordance with an example not covered by the claims.
  • the racket 1 has a club head 2 and a handle portion 4, which is connected via two arms 8 with the club head 2. That is, the one-piece shaft portion 5 of the club shaft 3 of the embodiment of FIGS. 1 to 4 is in the embodiment of FIG. 9 replaced by a two-part shaft with two arms 8.
  • the racket 1 on both arms 8 in the longitudinal direction of the club shaft extending indentations 6. These extend in this embodiment around the entire circumference of both arms 8.
  • the cross-sectional profile of the arms 8 corresponds to, for example, the in FIG. 5 shown cross-sectional profile of the one-piece club shaft.
  • the two arms 8 can each have some or all of the characteristics of the one-piece shaft of the embodiment described above.
  • opposite transition sections are provided, in which the indentation in each case gradually from the otherwise substantially curved around the entire circumference profile profile gradually.

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  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Physical Education & Sports Medicine (AREA)
  • Pulmonology (AREA)
  • Golf Clubs (AREA)
  • Laminated Bodies (AREA)

Claims (9)

  1. Batteur de jeu de balle (1) avec une tête de batteur (2) et un manche de batteur en une pièce (3), avec un seul bras, où le manche de batteur (3) présente un profil en section transversale courbé sensiblement tout autour de son pourtour dans lequel sont prévus plusieurs creux (6) s'étendant dans la direction longitudinale du manche de batteur, où le profil en section transversale du manche de batteur est ovale et est disposé de telle sorte que l'axe plus long de l'ovale s'étend dans une direction sensiblement perpendiculairement à un plan de mise des cordes du batteur et l'axe plus court de l'ovale dans une direction sensiblement dans le plan de la mise des cordes du batteur.
  2. Batteur de jeu de balle selon la revendication 1, où le rapport de l'axe plus long de l'ovale à l'axe plus court de l'ovale se situe dans la plage entre 1 et 2,5, de préférence entre 1,1 et 2 et selon une préférence particulière entre 1,2 et 1,5.
  3. Batteur de jeu de balle selon l'une des revendications 1 à 2, dans lequel est réalisé au manche de batteur (3) une section de prise (4), et les creux (6) sont réalisés dans la zone entre la tête de batteur (2) et la section de prise (4).
  4. Batteur de jeu de balle selon l'une des revendications 1 à 3, dans lequel les creux (6) sont espacés uniformément autour du pourtour du manche de batteur (3).
  5. Batteur de jeu de balle selon l'une des revendications 1 à 4, dans lequel sont prévus au moins quatre, de préférence au moins six, selon une préférence encore plus grande au moins huit creux (8) au manche de batteur (3).
  6. Batteur de jeu de balle selon l'une des revendications 1 à 5, dans lequel tous les creux (6) sont réalisés d'une manière sensiblement identique.
  7. Batteur de jeu de balle selon l'une des revendications 1 à 6, dans lequel au moins quelques-uns des creux (6) dans la direction longitudinale du manche de batteur (3) présentent des sections de transition opposées (7a, 7b) dans lesquelles les creux respectivement du profil en section transversale sinon courbé sensiblement autour de tout le pourtour deviennent progressivement plus profonds.
  8. Batteur de jeu de balle selon l'une des revendications 1 à 7, dans lequel les creux ont une longueur de 60 mm à 150 mm, de préférence de 80 mm à 120 mm, et/ou une largeur de 2 mm à 8 mm, de préférence de 3 mm à 6 mm et/ou une profondeur de 0,5 mm à 5 mm, de préférence de 1 mm à 3 mm.
  9. Batteur de jeu de balle selon l'une des revendications 1 à 8, dans lequel les creux sont réalisés, vus+ dans la direction de la section transversale, sensiblement en forme de U.
EP08011711A 2008-06-27 2008-06-27 Batteur de jeux de balle Not-in-force EP2138207B1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
ES08011711T ES2379406T3 (es) 2008-06-27 2008-06-27 Raqueta de juego de pelota
AT08011711T ATE539802T1 (de) 2008-06-27 2008-06-27 Ballspielschläger
EP08011711A EP2138207B1 (fr) 2008-06-27 2008-06-27 Batteur de jeux de balle

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP08011711A EP2138207B1 (fr) 2008-06-27 2008-06-27 Batteur de jeux de balle

Publications (2)

Publication Number Publication Date
EP2138207A1 EP2138207A1 (fr) 2009-12-30
EP2138207B1 true EP2138207B1 (fr) 2012-01-04

Family

ID=39865496

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08011711A Not-in-force EP2138207B1 (fr) 2008-06-27 2008-06-27 Batteur de jeux de balle

Country Status (3)

Country Link
EP (1) EP2138207B1 (fr)
AT (1) ATE539802T1 (fr)
ES (1) ES2379406T3 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2017217067A (ja) * 2016-06-03 2017-12-14 ヨネックス株式会社 ラケット、及び、グロメット

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB191102205A (en) * 1911-01-28 1911-10-12 Carl Oscar Uner Improvements in Tennis Racquets and the like.
US1930285A (en) * 1929-05-27 1933-10-10 Roy H Robinson Built up metal tube, frame and skeletonized metal member of high strength weight, and method of forming same
US2456023A (en) * 1947-02-14 1948-12-14 Rosenbalm Isaac Lee Tennis racket
CA2067618A1 (fr) * 1992-04-29 1993-10-30 Willi Hans Velke Raquette de tennis et methode de fabrication connexe
AU4413993A (en) * 1992-06-30 1994-01-24 Velke, Willi H. Tennis racquet having a surface structure adapted for the reduction of air resistance
US6761651B2 (en) * 2002-11-22 2004-07-13 Chin-Dong Pai Aluminum tennis racket

Also Published As

Publication number Publication date
ES2379406T3 (es) 2012-04-25
ATE539802T1 (de) 2012-01-15
EP2138207A1 (fr) 2009-12-30

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