EP0443001A1 - Ballschläger, insbesondere tennisschläger. - Google Patents
Ballschläger, insbesondere tennisschläger.Info
- Publication number
- EP0443001A1 EP0443001A1 EP90913398A EP90913398A EP0443001A1 EP 0443001 A1 EP0443001 A1 EP 0443001A1 EP 90913398 A EP90913398 A EP 90913398A EP 90913398 A EP90913398 A EP 90913398A EP 0443001 A1 EP0443001 A1 EP 0443001A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- area
- racket
- height
- heart zone
- facing away
- 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
Links
- 238000005452 bending Methods 0.000 claims description 8
- 238000012360 testing method Methods 0.000 claims description 6
- 230000007704 transition Effects 0.000 claims description 4
- NJRXVEJTAYWCQJ-UHFFFAOYSA-N thiomalic acid Chemical compound OC(=O)CC(S)C(O)=O NJRXVEJTAYWCQJ-UHFFFAOYSA-N 0.000 claims description 3
- 230000008859 change Effects 0.000 claims description 2
- 235000009508 confectionery Nutrition 0.000 claims description 2
- 238000013461 design Methods 0.000 description 11
- 238000010276 construction Methods 0.000 description 4
- 230000004323 axial length Effects 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000012549 training Methods 0.000 description 2
- 239000013585 weight reducing agent Substances 0.000 description 2
- 230000035508 accumulation Effects 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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 a tennis racket, with a grip part and a tensioning frame for a string 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 spars increases from the grip part to a central region of the covering oval and in turn decreases towards the racket head.
- This known configuration 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 player's hand or arm. If such undesirable vibrations can be avoided, it is then possible to control the vibration in the grip area.
- racket designs are mostly aimed at creating rackets that are as light as possible and low in the direction of the cross-sectional plane of the covering z, but the racket becomes softer overall and the avoidance of vibrations is insufficient.
- the invention now aims to provide a ball racket de type mentioned, in which also be easy to build and designed with a low frame height, better control of the vibrations i grip area is made possible.
- 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 is greater in the area of the heart zone and in the area of the racket head facing away from the handle end than in the intermediate area of the tensioning frame, the cross-sectional height in the the area of the club head facing away from the handle end is greater 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. Because the frame height in the club head is now greater than in the area of the centerpiece, the dependence of the deflection of the club on the distance from the grip area can be linearized, while the oscillating masses in the area of the centerpiece are reduced.
- 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-Nor 197-A.
- the construction according to the invention is advantageously made such that the frame spars in the area of the heart zone have a largely constant cross-sectional height.
- 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 rigidity of the individual subareas from the club handle to the club head is set in such a way that the deflection essentially occurs at a given load increases linearly with the distance 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 de 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 selected essentially linearly with the percentage increase in the covered area of the ball racket, the percentage increase in height depending - Speed of the covered surface 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 is in the area of a lower, essentially constant cross-sectional height of the frame spars, with the spread of undesirable vibrations into the grip area can be prevented in a particularly simple manner in that the weight of the bars per unit length in the area of the club head is greater than the weight of the bars 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 for covered areas between 600 and 720 cm 2 the height in the area of the heart zone is 16 to 24%, preferably about 20%, and the height in the area of the club head facing away from the end of the handle is 20 to 44%, preferably about 30%, greater than the height of the bars in between the area of the racket head facing away from the end of the handle and the area of the tenter frame lying in the heart zone.
- the design is advantageously made such that the weight of the spars per unit length in the heart zone area is less than or equal to the weight of the spars 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 in the region of the club head 3 facing away from the handle end with a greater curvature. Also in the area of the heart piece 2, the spars delimiting the covering oval are more curved in the partial area 4. 1 zones are entered in millimeters, each with correspond in Fig. 2 below deflection values.
- 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 one 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 Bending-Flex-Test support diameter of 38 mm can be selected and tennis rackets are divided into seven zones.
- 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 racquets 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 cm 2
- curve 7b measured for 660 cm 2 and 7c for 600 cm 2 .
- FIG. 3 shows the side frame spar 1 of a racket, the cross-sectional height b of which is selected in the area of the racket head 3 by approximately 30% greater than the height a i adjoining area. Likewise, the height b norma on the covering level of the frame bars 1 in the area of the frog 2 is chosen to be larger.
- 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, whereby depending on the area covered, a largely linear or uniform deflection behavior in a narrow range, for example cross-sectional heights according to the table below, is used to achieve this:
- 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 shows schematically 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 pr length unit are provided, which by correspondingly more layered design of the frame spars and / or the arrangement of vo Additional weights in the area of the increased cross-sectional height can be achieved.
- areas 11 with a 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 deliberately 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. Get 8 mm depending on the distance from the handle.
Landscapes
- Health & Medical Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Physical Education & Sports Medicine (AREA)
- Pulmonology (AREA)
- Golf Clubs (AREA)
- Laminated Bodies (AREA)
- Pivots And Pivotal Connections (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Floor Finish (AREA)
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT0212389A AT393967B (de) | 1989-09-11 | 1989-09-11 | Ballschlaeger, insbesondere tennisschlaeger |
AT2123/89 | 1989-09-11 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0443001A1 true EP0443001A1 (de) | 1991-08-28 |
EP0443001B1 EP0443001B1 (de) | 1993-06-09 |
Family
ID=3528268
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP90913398A Expired - Lifetime EP0443001B1 (de) | 1989-09-11 | 1990-09-11 | Ballschläger, insbesondere tennisschläger |
Country Status (6)
Country | Link |
---|---|
US (1) | US5183265A (de) |
EP (1) | EP0443001B1 (de) |
JP (1) | JP2554399B2 (de) |
AT (2) | AT393967B (de) |
CA (1) | CA2042039A1 (de) |
WO (1) | WO1991003283A1 (de) |
Families Citing this family (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5312102A (en) * | 1993-02-04 | 1994-05-17 | Lisco, Inc. | Variable inertia head racket |
WO1995004576A1 (en) * | 1993-08-05 | 1995-02-16 | Kenneth Godfrey Degaris | Ultra thin racquet frame |
DE69517619T2 (de) * | 1994-04-11 | 2001-02-15 | Wavex Corp | Schläger mit unebenem Rahmen |
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)
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 |
EP0171500A3 (en) * | 1984-07-31 | 1987-09-30 | Consolidated Sporting Goods Pty. Limited | Racquet frame with tapered thickness |
NL8402817A (nl) * | 1984-09-14 | 1986-04-01 | Pols Erik Bernard Van Der | Tennisracket. |
DE3434898A1 (de) * | 1984-09-22 | 1986-04-17 | Siegfried 7770 Überlingen Kuebler | Schlaeger fuer 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 |
IN170468B (de) * | 1987-08-04 | 1992-03-28 | Wilson Sporting Goods | |
JPH0429624Y2 (de) * | 1987-11-17 | 1992-07-17 | ||
JPH0429621Y2 (de) * | 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 |
-
1989
- 1989-09-11 AT AT0212389A patent/AT393967B/de not_active IP Right Cessation
-
1990
- 1990-09-11 CA CA002042039A patent/CA2042039A1/en not_active Abandoned
- 1990-09-11 AT AT90913398T patent/ATE90218T1/de not_active IP Right Cessation
- 1990-09-11 WO PCT/AT1990/000091 patent/WO1991003283A1/de active IP Right Grant
- 1990-09-11 US US07/659,307 patent/US5183265A/en not_active Expired - Lifetime
- 1990-09-11 EP EP90913398A patent/EP0443001B1/de not_active Expired - Lifetime
- 1990-09-11 JP JP2512322A patent/JP2554399B2/ja not_active Expired - Lifetime
Non-Patent Citations (1)
Title |
---|
See references of WO9103283A1 * |
Also Published As
Publication number | Publication date |
---|---|
WO1991003283A1 (de) | 1991-03-21 |
EP0443001B1 (de) | 1993-06-09 |
JP2554399B2 (ja) | 1996-11-13 |
US5183265A (en) | 1993-02-02 |
ATA212389A (de) | 1991-07-15 |
AT393967B (de) | 1992-01-10 |
CA2042039A1 (en) | 1991-03-12 |
ATE90218T1 (de) | 1993-06-15 |
JPH04501820A (ja) | 1992-04-02 |
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