EP1097730B1 - Racket for ball games - Google Patents

Racket for ball games Download PDF

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Publication number
EP1097730B1
EP1097730B1 EP00123052A EP00123052A EP1097730B1 EP 1097730 B1 EP1097730 B1 EP 1097730B1 EP 00123052 A EP00123052 A EP 00123052A EP 00123052 A EP00123052 A EP 00123052A EP 1097730 B1 EP1097730 B1 EP 1097730B1
Authority
EP
European Patent Office
Prior art keywords
racket
area
profile
head
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.)
Expired - Lifetime
Application number
EP00123052A
Other languages
German (de)
French (fr)
Other versions
EP1097730A1 (en
Inventor
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
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Head Sport GmbH
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Filing date
Publication date
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Publication of EP1097730A1 publication Critical patent/EP1097730A1/en
Application granted granted Critical
Publication of EP1097730B1 publication Critical patent/EP1097730B1/en
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    • AHUMAN NECESSITIES
    • A63SPORTS; GAMES; AMUSEMENTS
    • A63BAPPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B49/00Stringed rackets, e.g. for tennis
    • A63B49/02Frames
    • AHUMAN NECESSITIES
    • A63SPORTS; GAMES; AMUSEMENTS
    • A63BAPPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B49/00Stringed rackets, e.g. for tennis
    • A63B49/02Frames
    • A63B49/03Frames characterised by throat sections, i.e. sections or elements between the head and the shaft
    • AHUMAN NECESSITIES
    • A63SPORTS; GAMES; AMUSEMENTS
    • A63BAPPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B49/00Stringed rackets, e.g. for tennis
    • A63B49/02Frames
    • A63B49/10Frames made of non-metallic materials, other than wood
    • AHUMAN NECESSITIES
    • A63SPORTS; GAMES; AMUSEMENTS
    • A63BAPPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B49/00Stringed rackets, e.g. for tennis
    • A63B49/02Frames
    • A63B49/12Frames made of metal
    • AHUMAN NECESSITIES
    • A63SPORTS; GAMES; AMUSEMENTS
    • A63BAPPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B49/00Stringed rackets, e.g. for tennis
    • A63B49/02Frames
    • A63B2049/0201Frames with defined head dimensions
    • AHUMAN NECESSITIES
    • A63SPORTS; GAMES; AMUSEMENTS
    • A63BAPPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B49/00Stringed rackets, e.g. for tennis
    • A63B49/02Frames
    • A63B2049/0211Frames with variable thickness of the head in a direction perpendicular to the string plane
    • AHUMAN NECESSITIES
    • A63SPORTS; GAMES; AMUSEMENTS
    • A63BAPPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B49/00Stringed rackets, e.g. for tennis
    • A63B49/02Frames
    • A63B2049/0217Frames with variable thickness of the head in the string plane
    • AHUMAN NECESSITIES
    • A63SPORTS; GAMES; AMUSEMENTS
    • A63BAPPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B60/00Details or accessories of golf clubs, bats, rackets or the like
    • A63B60/06Handles

Definitions

  • the present invention relates to a sports racket or a racket for Ball games, especially a tennis racket with a tenter or Racket head to hold the string, one on the stenter subsequent heart area and a handle or handle section.
  • DE-A-34 34 956 and US-A-4 664 380 propose a racket in which the resonance frequency of the strung racket attached to the handle corresponds approximately to the length of time in which the ball with the covering is in contact.
  • the natural frequency of the racket with the Excitation frequency of the ball essentially match.
  • the racket is in has the greatest height in its heart zone and extends to the handle as well also tapered towards the club head, i.e. in both directions of the longitudinal axis, preferably the greatest height in either side of the heart zone extending area is constant.
  • the cross section of the stenter forming profile bar is essentially rectangular with changing height.
  • DE-A-39 10 871 shows a racket for ball games with a hollow tubular frame which forms a head, neck and shaft and carries a handle.
  • the frame has a perpendicular to the fabric plane
  • a cross-sectional height that goes from the bottom of the neck to the end of the head increases uniformly, so that the rigidity of the frame with increasing distance from the handle grows.
  • This arrangement where the frame is most flexible at the top of the handle, is supposed to decrease the angle to which the covering plane is and should be deflected when hitting a ball have a shock-absorbing effect.
  • US-A-5 810 683 describes a sports racket, particularly one Tennis racket, with a changing around the circumference of the stenter Cross-sectional shape.
  • the one that extends from the tip of the club head major part of the circumference of the stenter has an aerodynamic, i.e. a substantially oval cross section.
  • Which is from the handle section extending part of the frame has a rectangular cross-sectional profile, wherein the two profiles on each side through a transition section are fluidly connected to each other.
  • the transition section between the Both cross-sectional profiles are located near the heart area and extends in a range of at most 15% of the total racket length.
  • US-A-4 997 186 describes a tennis racket which is used on various Frame positions has different cross sections, the frame on Club head on the inside in the area of its maximum cross-sectional height has an abrupt transition or an abrupt step inwards at which the cross-sectional width changes suddenly.
  • US-A-5 312 102 describes a tennis racket with a head area, whose frame profile is different at different points Has cross-sectional shapes.
  • the frame profile In the area between 2 and 5 a.m. and between 7 a.m. and 10 a.m. the frame profile is substantially oval, while between 10 a.m. and 2 a.m. O'clock and between 5 and 7 o'clock the cross-sectional profile is approximately circular.
  • the circular profile is formed from two semicircular profiles.
  • the tennis racket described in EP-A-0 477 533 is thereby characterized in that the cross-sectional height and cross-sectional width of the Changes frame profile along the longitudinal extension of the racket.
  • the present invention is based on the object improved racket, especially an improved tennis racket to provide low weight with high rigidity. This object is achieved with the features of the claims.
  • the invention is based on the basic idea, depending on the stresses occurring in the respective frame position of the racket, such as e.g. Bending and torsion for the relevant type of stress provide optimal frame cross-sectional profiles.
  • stresses occurring in the respective frame position of the racket such as e.g. Bending and torsion for the relevant type of stress provide optimal frame cross-sectional profiles.
  • a suitable cross-sectional shape for torsional stresses the frame profile is a circular cross-section
  • for bending stresses for example a substantially rectangular cross-sectional profile for the Racket frame is suitable.
  • the respective frame position in the club head reaches the invention Racket with low weight, e.g. less than 200g for one Tennis racket, optimal strength and manageability. Furthermore, it is preferred, also in the heart area or in the shaft area of the invention Racket a cross-sectional shape optimally adapted to the type of stress the frame profile at the respective position. This allows the Manageability and the playing properties of the racket according to the invention be further increased.
  • the racket at the head end may be preferred to narrow the racket at the head end, i.e. to train with a lower overall height.
  • Corresponding a particularly preferred embodiment are in the heart area of the Two such bump-like stiffening elements are provided on each side of the racket, to provide a particularly stiff and light racket.
  • FIGs 1 and 2 is a conventional tennis racket 2 in front and Side view shown.
  • This tennis racket 2 essentially has one oval club head 4, a heart area 6 and a grip section 8. in the The head area 4 of the racket 2 is usually a recess 10 for receiving a wear frame or headgear, not shown, is provided.
  • the Heart area 6 of the racket is essentially the connection area between the head region 4 and the grip section 8 and has, for example, as shown in Fig. 1, an opening 12. This opening is not mandatory required. However, if it is formed, it is separated by two side sections 14 and 16 and a connecting section or a bridge 18 in the head region 4 the racket 2 formed. For strength reasons, can be between the two Side areas 14 and 16 of the heart area 6 a second connecting element 20 may be provided.
  • the conventional tennis racket 2 shown in Figures 1 and 2 is off a shape profile with substantially constant dimensions, apart from the recess 10, formed.
  • the cross-sectional shape or the Cross-sectional dimensions of the profile forming the racket frame are from Side area 14 of the heart area 6 around the head area 4 and Side region 16 is substantially constant and oval or rectangular. Only in The receiving area of the connecting element 18 has the racket 2 reinforced Cross-sectional dimensions.
  • a dial of a conventional clock drawn in order below the racket according to the invention more easily with reference to the respective circumferential position on the head area 4 of the racket in connection with to be able to describe the corresponding time. For example, corresponds thus twelve o'clock an extreme head end 22 of the one shown in FIG. 1 Racket.
  • FIG Figures 3 to 5 A preferred embodiment of a racket 30 according to the invention is shown in FIG Figures 3 to 5 shown.
  • the racket 30 according to the invention corresponds in FIG its basic structure is essentially a conventional tennis racket, such as described above with reference to Figures 1 and 2.
  • the means that the racket 30 according to the invention also has a head region 32, has a heart area 34 and a grip portion.
  • the heart area 34 of the Racket 30 according to the invention can also be used contrary to that shown in FIG. 3 Embodiment without opening 38, i.e. the handle section can run closed up to the head area 32.
  • Even the connecting element or the bridge 40 between the handle-side end sections 42 of the head region 32 is optional. Consequently, the heart area 34 can only be made from extensions 46 of the handle-side ends 42 of the head region 32, which extend towards the handle section extend, be formed.
  • the racket 30 is the The basic idea is that the profile forming the frame corresponds to the occurring at the individual frame positions (main) Strains has different cross-sectional shapes that to the have moments of resistance adapted to the respective types of stress.
  • the term "cross section" in the sense of the present invention refers to a Section through the frame profile of the racket along a plane that is in the essentially normal or perpendicular to a tangential plane on a Outer surface of the frame at the interface and essentially normal or perpendicular to a plane parallel to the stringing plane of the racket extends.
  • the enlarged partial front view shown in Figure 3 Racket 30 of this embodiment according to the invention only shows one Half of a head area 32 and a heart area 34.
  • the other, not shown racket half is preferably symmetrical.
  • the in Figure 3 cut lines a-a, b-b, c-c, etc. through the cross section of the racket profile are essentially at a distance of about 30 mm arranged.
  • the cuts n-n to are only in the heart region 34 of the racket t-t at other intervals according to the maximum occurring there Stresses arranged.
  • the cross-sectional profiles along the individual Sections of the preferred embodiment of racket 30 are in the figures 4a to 4t.
  • the height of the racket frame according to the invention is in the preferred embodiment, preferably continuously between 20 and 35 mm, preferably 28.5 mm.
  • a rather rectangular cross-sectional profile with a Axis ratio in the range of 1.93 to 1.61 provided in areas with particularly high bending stress Racket in the range of about two o'clock to four o'clock, i.e. in the range between the cuts g-g and l-l.
  • a rather rectangular cross-sectional profile with a Axis ratio in the range of 1.93 to 1.61 provided in areas with particularly high bending stress Racket in the range of about two o'clock to four o'clock, i.e. in the range between the cuts g-g and l-l.
  • a rather rectangular cross-sectional profile with a Axis ratio in the range of 1.93 to 1.61 provided.
  • Torsional stresses are essentially circular Cross-sectional profile particularly well suited.
  • Such a cross-sectional profile is for example in the range from about half past four to half past five, i.e. in the Find the range of cuts n-n, o-o and p-p.
  • the racket 30 according to the invention described above represents a particularly preferred embodiment of the present invention, this is however, not to those specified in FIGS. 4a to 4t and FIG. 5 Axis ratios and dimensions limited. Rather, in the field of present invention these dimensions and ratios depending on the application vary. Such is the racket 30 described in FIGS. 3 to 5 for example a tennis racket for which these dimensions and axis relationships are particularly preferred. However, the responsible specialist is without further be clear that, for example, for a squash racket others Dimensions and axis relationships can be advantageous.
  • ratios are only preferred information. These ratios can in a range of ⁇ 20% and particularly preferably in a range of Vary ⁇ 10%.
  • the racket 30 in the preferred embodiment of the racket 30 according to the invention also in the range from about four to six o'clock or in the heart region 34 one or several bump-like bulges or reinforcements are provided.
  • each have a bump-like curvature at the section n-n and p-p 51 and 53 provided. These bulges 51 and 53 are particularly for Absorption of particularly high stresses occurring at these points educated.
  • the axis ratio approaches one on, i.e. the cross-sectional profile is approximately rounded square.
  • Racket 30 to provide two such bump-like stiffening elements these are only optional. However, it is advantageous, at least in this area to provide one of these bumps, preferably two or more. In particular is it is advantageous to put two pairs of such stiffening elements on the racket provide axisymmetric arrangement.
  • FIGS. 6 to 12. There will be one simplified embodiment of the racket 30 according to the invention described.
  • the cross-sectional shape is an essentially circular or elliptical hollow profile.
  • a hollow profile is shown, for example, in FIGS. 8, 10 and 12, each along the cross-sectional profile of the racket 30 according to the invention lines VIII-VIII at about one thirty, X-X at about five and, XII-XII in Represent heart area.
  • Ellipse profiles is an axis ratio of the axes L: 1 in the range between 26:15 to 30:15 and particularly 28:15.
  • the section shown in Fig. 6 VIII-VIII is approximately in the range between one and two o'clock and in particular about one thirty.
  • a rectangular profile because of Stiffening through the bridge can also, as shown in the Embodiment, a circular or elliptical profile for the cross-sectional shape of the Frame or the two frame webs 46 and 48 may be provided.
  • an essentially rectangular hollow profile is particularly preferred.
  • Such a rectangular hollow profile has a high bending resistance moment and is therefore particularly suitable for absorbing bending stresses.
  • bending stresses occur in particular in the area of the section line IX-IX, ie between two and four o'clock. Consequently, a rectangular cross-section is provided in the area of the section line IX-IX between the two circular or elliptical hollow sections on the section lines VIII-VIII and XX, the sections preferably flowing smoothly or continuously into one another.
  • the aspect ratio L 9 : l 9 is preferably about 2.5 to 3.5 and in particular about 3.
  • Fig circular or elliptical profile illustrated 8 preferably to a narrower ellipse profile with an axial ratio of 8 L: tapered.
  • a narrower ellipse profile corresponding to FIG. 11 can also be provided between the ends 42 and 44 of the head region 32 facing the handle section 36, which have the circular or elliptical profile according to FIG. 10, and the circular or elliptical profile along the line XII-XII ,
  • the axis ratio L 11 : L 11 in this range is preferably between 2.5 and 3.5 and in particular about 3.
  • the Racket 30 according to the invention is also in relation to a central axis 52 essentially symmetrical, so that those described above Cross-sectional profiles between zero and six o'clock at appropriate points between twelve and six o'clock.
  • All known materials for the racket 30 according to the invention are known Materials for tennis, squash, badminton and other rackets for Suitable for ball sports.
  • the racket 30 according to the invention is made of Wood, metal, metal alloys, plastic, composite materials and Combinations can be made from it.

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Abstract

The racquet or bat (30) has a hitting-head , a handle part between which is a frame possessing a heart-shaped piece (34).. The profiled part forming the frame has varying cross-sectional shapes corresponding to the main types of stress occurring. The frame has at least two bump-shaped reinforcement elements (51,53).

Description

Die vorliegende Erfindung betrifft einen Sportschläger bzw. einen Schläger für Ballspiele, insbesondere einen Tennisschläger mit einem Spannrahmen bzw. Schlägerkopf zur Aufnahme der Bespannung, einem an den Spannrahmen anschließenden Herzbereich und einem Handgriff bzw. Griffabschnitt.The present invention relates to a sports racket or a racket for Ball games, especially a tennis racket with a tenter or Racket head to hold the string, one on the stenter subsequent heart area and a handle or handle section.

Generell zwingt die Energie eines während des Spielens auf die Bespannung des Schlägers treffenden Balles den Spannrahmen aus seiner Längsachse. Dies führt zu einer Verschlechterung der Zielgenauigkeit, wenn der Ball vom Schläger abprallt. Folglich ist eine solche Auslenkung des Spannrahmens für die Richtung eines gespielten Balles mit verantwortlich. Dabei können über die gesamte Länge eines Spielfelds Abweichungen von bis zu einem Meter von der gewünschten Fluglinie des Balles auftreten. Die Schlagpräzision bekannter Tennisschläger läßt somit erheblich zu wünschen übrig.In general, the energy of a player during play forces them to cover the The ball strikes the striker from its longitudinal axis. this leads to to a deterioration in accuracy when the ball is off the racket bounces. Consequently, such a deflection of the tenter is for the direction of a played ball with responsibility. You can use the entire length of a field deviations of up to one meter from the desired Airline of the ball occur. The precision of known tennis rackets leaves thus much to be desired.

Die DE-A-34 34 956 und US-A-4 664 380 schlagen einen Schläger vor, bei dem die Resonanzfrequenz des am Handgriff festliegenden bespannten Schlägers näherungsweise der Zeitdauer entspricht, in welcher der Ball mit der Bespannung in Berührung ist. Dabei soll die Eigenfrequenz des Schlägers mit der Erregerfrequenz des Balles im wesentlichen übereinstimmen. Als besonders günstige Form für den Schläger wird dabei angesehen, wenn der Schläger in seiner Herzzone die größte Höhe aufweist und sich sowohl zum Handgriff als auch zum Schlägerkopf, also in beide Richtungen der Längsachse, verjüngt, wobei bevorzugt die größte Höhe in einem beiderseits der Herzzone verlaufenden Bereich gleichbleibend ist. Der Querschnitt des den Spannrahmen bildenden Profilstabes ist im wesentlichen rechteckig mit sich ändernder Höhe.DE-A-34 34 956 and US-A-4 664 380 propose a racket in which the resonance frequency of the strung racket attached to the handle corresponds approximately to the length of time in which the ball with the covering is in contact. Here, the natural frequency of the racket with the Excitation frequency of the ball essentially match. As special favorable form for the racket is considered if the racket is in has the greatest height in its heart zone and extends to the handle as well also tapered towards the club head, i.e. in both directions of the longitudinal axis, preferably the greatest height in either side of the heart zone extending area is constant. The cross section of the stenter forming profile bar is essentially rectangular with changing height.

Die DE-A-39 10 871 zeigt einen Schläger für Ballspiele mit einem hohlen rohrförmigen Rahmen, der einen Kopf, einen Hals und einen Schaft bildet und einen Griff trägt. Der Rahmen hat in einer zur Bespannungsebene senkrechten Richtung eine Querschnittshöhe, die vom unteren Ende des Halses zum Ende des Kopfes gleichförmig zunimmt, so daß die Steifigkeit des Rahmens mit zunehmendem Abstand vom Griff wächst. Diese Anordnung, bei der der Rahmen am oberen Ende des Griffs am biegsamsten ist, soll den Winkel vermindern, um den die Bespannungsebene beim Schlagen eines Balles ausgelenkt wird und soll stoßdämpfend wirken.DE-A-39 10 871 shows a racket for ball games with a hollow tubular frame which forms a head, neck and shaft and carries a handle. The frame has a perpendicular to the fabric plane Direction a cross-sectional height that goes from the bottom of the neck to the end of the head increases uniformly, so that the rigidity of the frame with increasing distance from the handle grows. This arrangement where the frame is most flexible at the top of the handle, is supposed to decrease the angle to which the covering plane is and should be deflected when hitting a ball have a shock-absorbing effect.

Die US-A-5 810 683 beschreibt einen Sportschläger, insbesondere einen Tennisschläger, mit einer sich um den Umfang des Spannrahmens ändernden Querschnittsform. Der sich von der Spitze des Schlägerkopfs aus erstreckende größere Teil des Umfangs des Spannrahmens weist einen aerodynamischen, d.h. einen im wesentlichen ovalen Querschnitt auf. Der sich vom Griffabschnitt aus erstreckende Teil des Rahmens hat ein rechteckiges Querschnittsprofil, wobei die beiden Profile auf den beiden Seiten durch je einen Übergangsabschnitt miteinander fließend verbunden sind. Der Übergangsabschnitt zwischen den beiden Querschnittsprofilen befindet sich in der Nähe des Herzbereichs und erstreckt sich in einem Bereich von höchstens 15% der gesamten Schlägerlänge.US-A-5 810 683 describes a sports racket, particularly one Tennis racket, with a changing around the circumference of the stenter Cross-sectional shape. The one that extends from the tip of the club head major part of the circumference of the stenter has an aerodynamic, i.e. a substantially oval cross section. Which is from the handle section extending part of the frame has a rectangular cross-sectional profile, wherein the two profiles on each side through a transition section are fluidly connected to each other. The transition section between the Both cross-sectional profiles are located near the heart area and extends in a range of at most 15% of the total racket length.

Die US-A-4 997 186 beschreibt einen Tennisschläger, der an verschiedenen Rahmenpositionen verschiedene Querschnitte aufweist, wobei der Rahmen am Schlägerkopf an seiner Innenseite im Bereich seiner maximalen Querschnittshöhe einen abrupten Übergang bzw. eine abrupte Stufe nach innen aufweist, an der sich die Querschnittsbreite sprunghaft ändert.US-A-4 997 186 describes a tennis racket which is used on various Frame positions has different cross sections, the frame on Club head on the inside in the area of its maximum cross-sectional height has an abrupt transition or an abrupt step inwards at which the cross-sectional width changes suddenly.

Die US-A-5 312 102 beschreibt einen Tennisschläger mit einem Kopfbereich, dessen Rahmenprofil an verschiedenen Stellen unterschiedliche Querschnittsformen aufweist. Im Bereich zwischen 2 und 5 Uhr sowie zwischen 7 und 10 Uhr ist das Rahmenprofil im wesentlichen oval, während zwischen 10 und 2 Uhr sowie zwischen 5 und 7 Uhr das Querschnittsprofil annähernd kreisrund ist. Das kreisrunde Profil ist dabei aus zwei Halbkreisprofilen gebildet.US-A-5 312 102 describes a tennis racket with a head area, whose frame profile is different at different points Has cross-sectional shapes. In the area between 2 and 5 a.m. and between 7 a.m. and 10 a.m. the frame profile is substantially oval, while between 10 a.m. and 2 a.m. O'clock and between 5 and 7 o'clock the cross-sectional profile is approximately circular. The circular profile is formed from two semicircular profiles.

Der in der EP-A-0 477 533 beschriebene Tennisschläger ist dadurch gekennzeichnet, dass sich die Querschnittshöhe und die Querschnittsbreite des Rahmenprofils entlang der Längserstreckung des Schlägers ändert.The tennis racket described in EP-A-0 477 533 is thereby characterized in that the cross-sectional height and cross-sectional width of the Changes frame profile along the longitudinal extension of the racket.

Während einige der im Stand der Technik bekannten Schläger relativ steif ausgebildet sind und dadurch eine Verformung des Schlägers während des Spielens reduzieren, haben diese Schläger den Nachteil, daß die verbesserte Steifigkeit auf Kosten eines erhöhten Gewichts erzielt wird. Das höhere Gewicht verschlechtert allerdings wiederum die Handhabbarkeit des Schlägers während des Spielens und kann zu Schmerzen im Schlagarm (Tennisarm) führen. Dementsprechend ist mit den aus dem Stand der Technik bekannten Schlägern die optimale Steifigkeit bei gleichzeitig geringem Gewicht des Schlägers bei weitem nicht erfüllt, so daß diese bekannten Schläger weiterhin zu wünschen übrig lassen.While some of the rackets known in the art are relatively stiff are formed and thereby a deformation of the racket during the Reduce play, these rackets have the disadvantage that the improved Stiffness is achieved at the expense of increased weight. The higher weight however again worsens the handling of the racket during of playing and can lead to pain in the blow arm (tennis arm). Accordingly, with the rackets known from the prior art the optimal rigidity with low weight of the racket far from being met, so these well-known rackets continue to be desired leave.

Der vorliegenden Erfindung liegt die Aufgabe zugrunde, einen weiter verbesserten Schläger, insbesondere einen verbesserten Tennisschläger, mit geringem Gewicht bei gleichzeitig großer Steifigkeit zur Verfügung zu stellen. Diese Aufgabe wird mit den Merkmalen der Patentansprüche gelöst.The present invention is based on the object improved racket, especially an improved tennis racket to provide low weight with high rigidity. This object is achieved with the features of the claims.

Dabei geht die Erfindung von dem Grundgedanken aus, abhängig von den an der jeweiligen Rahmenposition des Schlägers auftretenden Beanspruchungen, wie z.B. Biegung und Torsion, die für die diesbezügliche Beanspruchungsart optimalen Rahmenquerschnittsprofile vorzusehen. Beispielsweise hat es sich gezeigt, daß für Torsionsbeanspruchungen eine geeignete Querschnittsform für das Rahmenprofil ein Kreisquerschnitt ist, während für Biegebeanspruchungen beispielsweise ein im wesentlichen rechteckiges Querschnittsprofil für den Schlägerrahmen geeignet ist.The invention is based on the basic idea, depending on the stresses occurring in the respective frame position of the racket, such as e.g. Bending and torsion for the relevant type of stress provide optimal frame cross-sectional profiles. For example, it has demonstrated that a suitable cross-sectional shape for torsional stresses the frame profile is a circular cross-section, while for bending stresses for example a substantially rectangular cross-sectional profile for the Racket frame is suitable.

Durch die Anpassung des Querschnittsprofils je nach Beanspruchungsart an der jeweiligen Rahmenposition im Schlägerkopf erreicht der erfindungsgemäße Schläger bei gleichzeitig geringem Gewicht, von z.B. weniger als 200g für einen Tennisschläger, eine optimale Festigkeit und Handhabbarkeit. Ferner ist es bevorzugt, auch im Herzbereich bzw. im Schaftbereich des erfindungsgemäßen Schlägers eine an die Beanspruchungsart optimal angepaßte Querschnittsform des Rahmenprofils an der jeweiligen Position vorzusehen. Dadurch können die Handhabbarkeit und die Spieleigenschaften des erfindungsgemäßen Schlägers weiter erhöht werden.By adapting the cross-sectional profile to the The respective frame position in the club head reaches the invention Racket with low weight, e.g. less than 200g for one Tennis racket, optimal strength and manageability. Furthermore, it is preferred, also in the heart area or in the shaft area of the invention Racket a cross-sectional shape optimally adapted to the type of stress the frame profile at the respective position. This allows the Manageability and the playing properties of the racket according to the invention be further increased.

Darüber hinaus kann es bevorzugt sein, den Schläger am Kopfende schmäler, d.h. mit niedrigerer Bauhöhe auszubilden. Insbesondere ist es bevorzugt, am Schläger mindestens ein höckerartiges Versteifungselement vorzusehen, durch das lokal auftretende Belastungen aufgenommen werden können. Entsprechend einer besonders bevorzugten Ausführungsform sind im Herzbereich des Schlägers je Seite zwei derartige höckerartige Versteifungselemente vorgesehen, ums so einen besonders steifen und leichten Schläger bereitzustellen. In addition, it may be preferred to narrow the racket at the head end, i.e. to train with a lower overall height. In particular, it is preferred to To provide racket at least one hump-like stiffening element that locally occurring loads can be absorbed. Corresponding a particularly preferred embodiment are in the heart area of the Two such bump-like stiffening elements are provided on each side of the racket, to provide a particularly stiff and light racket.

Nachstehend wird der erfindungsgemäße Schläger anhand einer bevorzugten Ausführungsform unter Bezugnahme auf die Zeichnungen näher beschrieben. Es zeigen:

Fig. 1
eine Vorderansicht eines herkömmlichen Tennisschlägers gemäß Stand der Technik;
Fig. 2
eine Seitenansicht des herkömmlichen Tennisschlägers gemäß Fig. 1;
Fig. 3
eine Teilvorderansicht einer Hälfte einer bevorzugten Ausführungsform des erfindungsgemäßen Schlägers;
Fig. 4a bis 4t
Schnittdarstellungen verschiedener Querschnittsprofile entlang der in Fig. 3 eingezeichneten Schnittlinien;
Fig. 5
eine vergrößerte Teil-Vorderansicht einer Hälfte einer bevorzugten Ausführungsform des erfindungsgemäßen Schlägers, ähnlich Figur 3, wobei die Achsverhältnisse der Querschnittsprofile an den jeweiligen Schnittstellen angegeben sind;
Fig. 6
eine schematische Vorderansicht einer vereinfachten Ausführungsform des erfindungsgemäßen Schlägers;
Fig. 7
eine Schnittdarstellung des Querschnittsprofils entlang der Linie VII-VII von Fig. 6;
Fig. 8
eine Schnittdarstellung des Querschnittsprofils entlang der Linie VIII-VIII von Fig. 6;
Fig. 9
eine Schnittdarstellung des Querschnittsprofils entlang der Linie IX-IX von Fig. 6;
Fig. 10
eine Schnittdarstellung des Querschnittsprofils entlang der Linie X-X von Fig. 6;
Fig. 11
eine Schnittdarstellung des Querschnittsprofils entlang der Linie XI-XI von Fig. 6;
Fig. 12
eine Schnittdarstellung des Querschnittsprofils entlang der Linie XII-XII von Fig. 6.
The racket according to the invention is described in more detail below on the basis of a preferred embodiment with reference to the drawings. Show it:
Fig. 1
a front view of a conventional tennis racket according to the prior art;
Fig. 2
a side view of the conventional tennis racket of FIG. 1;
Fig. 3
a partial front view of one half of a preferred embodiment of the racket according to the invention;
4a to 4t
Sectional representations of different cross-sectional profiles along the section lines drawn in Fig. 3;
Fig. 5
an enlarged partial front view of a half of a preferred embodiment of the racket according to the invention, similar to Figure 3, wherein the axial relationships of the cross-sectional profiles are indicated at the respective interfaces;
Fig. 6
is a schematic front view of a simplified embodiment of the racket according to the invention;
Fig. 7
a sectional view of the cross-sectional profile along the line VII-VII of Fig. 6;
Fig. 8
a sectional view of the cross-sectional profile along the line VIII-VIII of Fig. 6;
Fig. 9
a sectional view of the cross-sectional profile along the line IX-IX of Fig. 6;
Fig. 10
a sectional view of the cross-sectional profile along the line XX of Fig. 6;
Fig. 11
a sectional view of the cross-sectional profile along the line XI-XI of Fig. 6;
Fig. 12
6 shows a sectional illustration of the cross-sectional profile along the line XII-XII from FIG. 6.

In den Figuren 1 und 2 ist ein herkömmlicher Tennisschläger 2 in Vorder- und Seitenansicht dargestellt. Dieser Tennisschläger 2 weist einen im wesentlichen ovalen Schlägerkopf 4, einen Herzbereich 6 und einen Griffabschnitt 8 auf. Im Kopfbereich 4 des Schlägers 2 ist üblicherweise eine Vertiefung 10 zur Aufnahme eines nicht dargestellten Verschleißrahmens bzw. Kopfbandes vorgesehen. Der Herzbereich 6 des Schlägers ist im wesentlichen der Verbindungsbereich zwischen dem Kopfbereich 4 und dem Griffabschnitt 8 und weist beispielsweise, wie in Fig. 1 dargestellt, eine Öffnung 12 auf. Diese Öffnung ist nicht zwingend erforderlich. Ist sie jedoch ausgebildet, so wird sie von zwei Seitenabschnitten 14 und 16 sowie einem Verbindungsabschnitt bzw. einer Brücke 18 im Kopfbereich 4 des Schlägers 2 gebildet. Aus Festigkeitsgründen kann zwischen den beiden Seitenbereichen 14 und 16 des Herzbereichs 6 ein zweites Verbindungselement 20 vorgesehen sein.In Figures 1 and 2 is a conventional tennis racket 2 in front and Side view shown. This tennis racket 2 essentially has one oval club head 4, a heart area 6 and a grip section 8. in the The head area 4 of the racket 2 is usually a recess 10 for receiving a wear frame or headgear, not shown, is provided. The Heart area 6 of the racket is essentially the connection area between the head region 4 and the grip section 8 and has, for example, as shown in Fig. 1, an opening 12. This opening is not mandatory required. However, if it is formed, it is separated by two side sections 14 and 16 and a connecting section or a bridge 18 in the head region 4 the racket 2 formed. For strength reasons, can be between the two Side areas 14 and 16 of the heart area 6 a second connecting element 20 may be provided.

Der in den Figuren 1 und 2 dargestellte herkömmliche Tennisschläger 2 ist aus einem Formprofil mit im wesentlichen konstanten Abmessungen, abgesehen von der Vertiefung 10, ausgebildet. Die Querschnittsform bzw. die Querschnittsabmessungen des den Schlägerrahmen bildenden Profils sind vom Seitenbereich 14 des Herzbereichs 6 um den Kopfbereich 4 und zum Seitenbereich 16 im wesentlichen konstant und oval oder rechteckig. Lediglich im Aufnahmebereich des Verbindungselements 18 weist der Schläger 2 verstärkte Querschnittsabmessungen auf.The conventional tennis racket 2 shown in Figures 1 and 2 is off a shape profile with substantially constant dimensions, apart from the recess 10, formed. The cross-sectional shape or the Cross-sectional dimensions of the profile forming the racket frame are from Side area 14 of the heart area 6 around the head area 4 and Side region 16 is substantially constant and oval or rectangular. Only in The receiving area of the connecting element 18 has the racket 2 reinforced Cross-sectional dimensions.

In die in Fig. 1 dargestellte Vorderansicht des Tennisschlägers 2 ist im Kopfbereich 4 ein Zifferblatt einer herkömmlichen Uhr eingezeichnet, um nachstehend den erfindungsgemäßen Schläger leichter unter Bezugnahme auf die jeweilige Umfangsposition am Kopfbereich 4 des Schlägers in Verbindung mit der entsprechenden Uhrzeit beschreiben zu können. Beispielsweise entspricht also zwölf Uhr einem äußersten Kopfende 22 des in Fig. 1 dargestellten Schlägers.In the front view of the tennis racket 2 shown in Fig. 1 is in Head area 4 a dial of a conventional clock drawn in order below the racket according to the invention more easily with reference to the respective circumferential position on the head area 4 of the racket in connection with to be able to describe the corresponding time. For example, corresponds thus twelve o'clock an extreme head end 22 of the one shown in FIG. 1 Racket.

Eine bevorzugte Ausführungsform eines erfindungsgemäßen Schlägers 30 ist in den Figuren 3 bis 5 dargestellt. Der erfindungsgemäße Schläger 30 entspricht in seinem Grundaufbau im wesentlichen einem herkömmlichen Tennisschläger, wie vorstehend unter Bezugnahme auf die Figuren 1 und 2 beschrieben. Das bedeutet, daß auch der erfindungsgemäße Schläger 30 einen Kopfbereich 32, einen Herzbereich 34 und einen Griffabschnitt hat. Der Herzbereich 34 des erfindungsgemäßen Schlägers 30 kann auch entgegen der in Fig. 3 dargestellten Ausführungsform ohne Öffnung 38 ausgebildet sein, d.h. der Griffabschnitt kann geschlossen bis zum Kopfbereich 32 verlaufen. Auch das Verbindungselement bzw. die Brücke 40 zwischen griffseitigen Endabschnitten 42 des Kopfbereichs 32 ist optional. Folglich kann der Herzbereich 34 auch nur aus Verlängerungen 46 der griffseitigen Enden 42 des Kopfbereichs 32, die sich zum Griffabschnitt hin erstrecken, gebildet sein.A preferred embodiment of a racket 30 according to the invention is shown in FIG Figures 3 to 5 shown. The racket 30 according to the invention corresponds in FIG its basic structure is essentially a conventional tennis racket, such as described above with reference to Figures 1 and 2. The means that the racket 30 according to the invention also has a head region 32, has a heart area 34 and a grip portion. The heart area 34 of the Racket 30 according to the invention can also be used contrary to that shown in FIG. 3 Embodiment without opening 38, i.e. the handle section can run closed up to the head area 32. Even the connecting element or the bridge 40 between the handle-side end sections 42 of the head region 32 is optional. Consequently, the heart area 34 can only be made from extensions 46 of the handle-side ends 42 of the head region 32, which extend towards the handle section extend, be formed.

Wie vorstehend bereits erläutert, liegt dem erfindungsgemäßen Schläger 30 der Grundgedanke zugrunde, daß das den Rahmen bildende Profil entsprechend der an den einzelnen Rahmenpositionen auftretenden (Haupt-) Beanspruchungen verschiedene Querschnittsformen aufweist, die an die jeweiligen Beanspruchungsarten angepaßte Widerstandsmomente haben. Der Begriff "Querschnitt" bezieht sich im Sinn der vorliegenden Erfindung auf einen Schnitt durch das Rahmenprofil des Schlägers entlang einer Ebene, die sich im wesentlichen normal bzw. senkrecht zu einer Tangentialebene an einer Außenfläche des Rahmens an der Schnittstelle und im wesentlichen normal bzw. senkrecht zu einer zur Bespannungsebene des Schlägers parallelen Ebene erstreckt.As already explained above, the racket 30 according to the invention is the The basic idea is that the profile forming the frame corresponds to the occurring at the individual frame positions (main) Strains has different cross-sectional shapes that to the have moments of resistance adapted to the respective types of stress. The The term "cross section" in the sense of the present invention refers to a Section through the frame profile of the racket along a plane that is in the essentially normal or perpendicular to a tangential plane on a Outer surface of the frame at the interface and essentially normal or perpendicular to a plane parallel to the stringing plane of the racket extends.

Eine bevorzugte Ausführungsform des erfindungsgemäßen Tennisschlägers wird nachfolgend unter Bezugnahme auf die Figuren 3 bis 5 beschrieben. In diesem - Zusammenhang ist anzumerken, daß dieses Beispiel nicht als einschränkend oder ausschließliche Ausführungsform der vorliegenden Erfindung zu betrachten ist, sondern vielmehr die derzeit bevorzugte Ausführungsform darstellt.A preferred embodiment of the tennis racket according to the invention described below with reference to Figures 3 to 5. In this - It should be noted that this example is not restrictive or exclusive embodiment of the present invention but rather represents the currently preferred embodiment.

Die in Figur 3 dargestellte vergrößerte Teil-Vorderansicht des erfindungsgemäßen Schlägers 30 dieser Ausführungsform zeigt lediglich eine Hälfte eines Kopfbereichs 32 und eines Herzbereichs 34. Die andere, nicht dargestellte Schlägerhälfte ist vorzugsweise symmetrisch dazu ausgebildet. Die in Figur 3 eingezeichneten Schnittlinien a-a, b-b, c-c usw. durch den Querschnitt des Schlägerprofils sind im wesentlichen in einem Abstand von ca. 30 mm angeordnet. Lediglich im Herzbereich 34 des Schlägers sind die Schnitte n-n bis t-t in anderen Abständen entsprechend der dort auftretenden maximalen Beanspruchungen angeordnet. Die Querschnittsprofile entlang der einzelnen Schnitte der bevorzugten Ausführungsform des Schlägers 30 sind in den Figuren 4a bis 4t dargestellt. Die Höhe des erfindungsgemäßen Schlägerrahmens beträgt in der bevorzugten Ausführungsform vorzugsweise durchgehend etwa zwischen 20 und 35 mm, vorzugsweise 28,5 mm.The enlarged partial front view shown in Figure 3 Racket 30 of this embodiment according to the invention only shows one Half of a head area 32 and a heart area 34. The other, not shown racket half is preferably symmetrical. The in Figure 3 cut lines a-a, b-b, c-c, etc. through the cross section of the racket profile are essentially at a distance of about 30 mm arranged. The cuts n-n to are only in the heart region 34 of the racket t-t at other intervals according to the maximum occurring there Stresses arranged. The cross-sectional profiles along the individual Sections of the preferred embodiment of racket 30 are in the figures 4a to 4t. The height of the racket frame according to the invention is in the preferred embodiment, preferably continuously between 20 and 35 mm, preferably 28.5 mm.

Die in Figuren 4a bis 4t dargestellten Querschnittsprofile sind mit der jeweiligen Querschnittsbreite an den einzelnen Schnittstellen bemaßt, so daß sich zusammen mit der konstanten bevorzugten Bauhöhe von 28,5 mm ein bestimmtes Achsverhältnis der im wesentlichen elliptischen Querschnittsprofile einstellt. Dieses Achsverhältnis ist jeweils unter den dargestellten Querschnittsprofilen an den einzelnen Schnittpositionen angegeben. Aus Gründen der besseren Übersichtlichkeit sind die einzelnen Achsverhältnisse in Figur 5 nochmals an den einzelnen Schnittstellen direkt angezeigt.The cross-sectional profiles shown in Figures 4a to 4t are with the respective Cross-sectional width dimensioned at the individual interfaces so that together with the constant preferred height of 28.5 mm specific axis ratio of the essentially elliptical cross-sectional profiles established. This axis ratio is in each case shown Cross-sectional profiles specified at the individual cutting positions. Out For better clarity, the individual axis relationships are in Figure 5 displayed again directly at the individual interfaces.

So ist beispielsweise an besonders stark biegebeanspruchten Bereichen des Schlägers im Bereich von etwa zwei Uhr bis vier Uhr, d.h. im Bereich zwischen den Schnitten g-g und l-l ein eher rechteckiges Querschnittsprofil mit einem Achsverhältnis im Bereich von 1,93 bis 1,61 vorgesehen. Zur Aufnahme von Torsionsbeanspruchungen ist im wesentlichen ein kreisringförmiges Querschnittsprofil besonders gut geeignet. Ein derartiges Querschnittsprofil ist beispielsweise im Bereich von etwa halb fünf Uhr bis halb sechs Uhr, d.h. im Bereich der Schnitte n-n, o-o und p-p zu finden. Dort bewegt sich das Achsverhältnis etwa im Bereich zwischen 1,05 und 1,32. Im Griff- und Herzbereich 34 des Schlägers ist wegen der dort auftretenden hohen Biegebeanspruchungen ein im wesentlichen rechteckiges Querschnittsprofil, wie es z.B. in den Figuren 4q, 4r und 4s dargestellt ist, besonders bevorzugt. Bei einem eine Brücke 40 aufweisenden Schlägertyp ist jedoch aufgrund der durch die Brücke 40 gegebenen Versteifung auch eine andere Querschnittsform, z.B. Kreis- oder Ellipsenform möglich.For example, in areas with particularly high bending stress Racket in the range of about two o'clock to four o'clock, i.e. in the range between the cuts g-g and l-l a rather rectangular cross-sectional profile with a Axis ratio in the range of 1.93 to 1.61 provided. To accommodate Torsional stresses are essentially circular Cross-sectional profile particularly well suited. Such a cross-sectional profile is for example in the range from about half past four to half past five, i.e. in the Find the range of cuts n-n, o-o and p-p. That’s moving there Axis ratio in the range between 1.05 and 1.32. In the grip and Heart area 34 of the racket is due to the high occurring there Bending stresses have a substantially rectangular cross-sectional profile, such as it e.g. is shown in Figures 4q, 4r and 4s, particularly preferred. at a club type having a bridge 40 is however due to the given the stiffening bridge 40 also a different cross-sectional shape, e.g. Circular or elliptical shape possible.

Im Bereich der Spitze des Schlägerkopfes, d.h. also im Bereich von zwölf Uhr bis etwa ein Uhr dreißig oder zwei Uhr, ist bevorzugt ein elliptisches Querschnittsprofil vorgesehen. Darüber hinaus ist es vorteilhaft, die Rahmenbreite zum äußersten Kopfbereich 50 des Schlägers 30 hin zu reduzieren, so daß sich hier besonders schlanke Rahmenformen gestalten lassen. Dies ist in den Figuren 4a bis 4f dargestellt. Das Achsverhältnis im Bereich der Schnitte a-a bis f-f bewegt sich vorzugsweise zwischen 2,05 und 2,59. Zwischen den verschiedenen Querschnittsprofilen ist vorzugsweise jeweils ein kontinuierlicher Übergang vorgesehen.In the area of the tip of the club head, i.e. So in the range from twelve o'clock to about one thirty or two o'clock, is preferably an elliptical Cross-sectional profile provided. In addition, it is advantageous to Frame width towards the outermost head region 50 of the racket 30 reduce, so that here are particularly slim frame shapes to let. This is shown in Figures 4a to 4f. The axis ratio in The range of cuts a-a to f-f preferably ranges between 2.05 and 2.59. There is preferably between the different cross-sectional profiles a continuous transition is envisaged.

Der vorstehend beschriebene erfindungsgemäße Schläger 30 stellt eine besonders bevorzugte Ausführungsform der vorliegenden Erfindung dar, diese ist jedoch nicht auf die in den Figuren 4a bis 4t und Figur 5 angegebenen Achsverhältnisse und Abmessungen beschränkt. Vielmehr können im Bereich der vorliegenden Erfindung diese Maße und Verhältnisse je nach Anwendungsfall variieren. So ist der in den Figuren 3 bis 5 beschriebene Schläger 30 beispielsweise ein Tennisschläger, für den diese Maße und Achsverhältnisse besonders bevorzugt sind. Dem zuständigen Fachmann wird jedoch ohne weiteres auch klar sein, daß beispielsweise für einen Squashschläger andere Abmessungen und Achsverhältnisse vorteilhaft sein können.The racket 30 according to the invention described above represents a particularly preferred embodiment of the present invention, this is however, not to those specified in FIGS. 4a to 4t and FIG. 5 Axis ratios and dimensions limited. Rather, in the field of present invention these dimensions and ratios depending on the application vary. Such is the racket 30 described in FIGS. 3 to 5 for example a tennis racket for which these dimensions and axis relationships are particularly preferred. However, the responsible specialist is without further be clear that, for example, for a squash racket others Dimensions and axis relationships can be advantageous.

Wie vorstehend erläutert stellen die in den Figuren 4a bis 4t angegebenen Achsverhältnisse lediglich bevorzugte Angaben dar. Diese Verhältnisse können in einem Bereich von ± 20% und besonders bevorzugt in einem Bereich von ± 10% variieren.As explained above, those shown in FIGS. 4a to 4t Axis ratios are only preferred information. These ratios can in a range of ± 20% and particularly preferably in a range of Vary ± 10%.

Bei der bevorzugten Ausführungsform des erfindungsgemäßen Schlägers 30 sind ferner im Bereich von etwa vier Uhr bis sechs Uhr bzw. im Herzbereich 34 eine oder mehrere höckerartige Wölbungen oder Verstärkungen vorgesehen. Gemäß den Figuren 3 bis 5 ist am Schnitt n-n und p-p jeweils eine höckerartige Wölbung 51 und 53 vorgesehen. Diese Auswölbungen 51 und 53 sind insbesondere zur Aufnahme besonders hoher, an diesen Stellen auftretenden Beanspruchungen ausgebildet. In diesem gewölbten Bereich nähert sich das Achsverhältnis eins an, d.h. das Querschnittsprofil ist annähernd abgerundet quadratisch. Obwohl es bevorzugt ist, etwa in der Nähe des Herzbereichs 34 des erfindungsgemäßen Schlägers 30 zwei derartige höckerartige Versteifungselemente vorzusehen, sind diese lediglich optional. Vorteilhaft ist es jedoch, in diesem Bereich mindestens einen dieser Höcker, vorzugsweise zwei oder mehr vorzusehen. Insbesondere ist es vorteilhaft, am Schläger zwei Paare derartiger Versteifungselemente in achsensymmetrischer Anordnung vorzusehen.In the preferred embodiment of the racket 30 according to the invention also in the range from about four to six o'clock or in the heart region 34 one or several bump-like bulges or reinforcements are provided. According to FIGS. 3 to 5 each have a bump-like curvature at the section n-n and p-p 51 and 53 provided. These bulges 51 and 53 are particularly for Absorption of particularly high stresses occurring at these points educated. In this curved area, the axis ratio approaches one on, i.e. the cross-sectional profile is approximately rounded square. Although it is preferred, approximately in the vicinity of the heart region 34 of the invention Racket 30 to provide two such bump-like stiffening elements these are only optional. However, it is advantageous, at least in this area to provide one of these bumps, preferably two or more. In particular is it is advantageous to put two pairs of such stiffening elements on the racket provide axisymmetric arrangement.

Im folgenden wird auf die Figuren 6 bis 12 Bezug genommen. Dort wird eine vereinfachte Ausführungsform des erfindungsgemäßen Schlägers 30 beschrieben.In the following reference is made to FIGS. 6 to 12. There will be one simplified embodiment of the racket 30 according to the invention described.

Eine beispielsweise gegenüber Torsionsbeanspruchungen besonders angepaßte Querschnittsform ist ein im wesentlichen kreis- oder ellipsenförmiges Hohlprofil. Ein solches Hohlprofil ist beispielsweise in den Figuren 8, 10 und 12 dargestellt, die jeweils das Querschnittsprofil des erfindungsgemäßen Schlägers 30 entlang der Linien VIII-VIII bei etwa ein Uhr dreißig, X-X bei etwa fünf Uhr und, XII-XII im Herzbereich darstellen. Für die in den Figuren 8, 10 und 12 dargestellten Ellipsenprofile ist ein Achsverhältnis der Achsen L:l im Bereich zwischen 26:15 bis 30:15 und insbesondere 28:15 bevorzugt. Der in Fig. 6 dargestellte Schnitt VIII-VIII liegt etwa im Bereich zwischen ein und zwei Uhr und insbesondere bei etwa ein Uhr dreißig. Die Schnittlinie X-X in Fig. 6 verläuft etwa zwischen vier und sechs Uhr und insbesondere bei fünf Uhr. Es hat sich im Rahmen der Erfindung gezeigt, daß in diesem Bereich überraschenderweise besonders hohe nach außen gerichtete Torsionsmomente auftreten, die in Fig. 6 durch die beiden Pfeile A symbolisiert sind. Diese nach außen gerichteten Torsionsmomente sind insbesondere deshalb überraschend, weil eigentlich zu erwarten wäre, daß sich beim Aufprall eines Balles auf eine nicht dargestellte, im Kopfbereich 32 des Schlägers 30 vorgesehene Bespannung sich der Rahmenabschnitt im Bereich des Schnittes X-X nach innen verdreht. Im Bereich der Schnittlinien XI-XI und XII-XII ist aufgrund der dort auftretenden hohen Momente im Herzbereich 34 des erfindungsgemäßen Schlägers ein Rechteckprofil bevorzugt, wegen der Versteifung durch die Brücke kann aber auch, wie in der gezeigten Ausführungsform, ein Kreis- oder Ellipsenprofil für die Querschnittsform des Rahmens bzw. der beiden Rahmenstege 46 und 48 vorgesehen sein.One especially adapted, for example, to torsional stresses The cross-sectional shape is an essentially circular or elliptical hollow profile. Such a hollow profile is shown, for example, in FIGS. 8, 10 and 12, each along the cross-sectional profile of the racket 30 according to the invention lines VIII-VIII at about one thirty, X-X at about five and, XII-XII in Represent heart area. For those shown in Figures 8, 10 and 12 Ellipse profiles is an axis ratio of the axes L: 1 in the range between 26:15 to 30:15 and particularly 28:15. The section shown in Fig. 6 VIII-VIII is approximately in the range between one and two o'clock and in particular about one thirty. The section line X-X in FIG. 6 runs approximately between four and six o'clock and especially at five o'clock. It has been under the Invention shown that surprisingly particularly high in this area outward torsional moments occur in Fig. 6 by the two Arrows A are symbolized. These are outward torsional moments especially surprising because it would actually be expected that upon impact of a ball on a head, not shown, 32 of the Racket 30 provided covering the frame section in the area of the cut X-X turned inwards. In the area of the cutting lines XI-XI and XII-XII is due to the high moments occurring there in the heart area 34 of the racket according to the invention preferred a rectangular profile, because of Stiffening through the bridge can also, as shown in the Embodiment, a circular or elliptical profile for the cross-sectional shape of the Frame or the two frame webs 46 and 48 may be provided.

Für Schlägerbereiche, in denen überwiegend Biegebeanspruchungen auftreten, ist insbesondere ein im wesentlichen rechteckiges Hohlprofil bevorzugt. Ein solches Rechteck-Hohlprofil weist ein hohes Biegewiederstandsmoment auf und ist daher für die Aufnahme von Biegebeanspruchungen besonders geeignet. Am Schlägerkopf 32 treten solche Biegebeanspruchungen insbesondere im Bereich der Schnittlinie IX-IX, d.h. zwischen zwei und vier Uhr auf. Folglich ist zwischen den beiden kreis- oder ellipsenförmigen Hohlprofilen an den Schnittlinien VIII-VIII sowie X-X ein Rechteckquerschnitt im Bereich der Schnittlinie IX-IX vorgesehen, wobei die Profile vorzugsweise fließend bzw. kontinuierlich ineinander übergehen. Das Seitenlängenverhältnis L9:l9 ist vorzugsweise etwa 2,5 bis 3,5 und insbesondere etwa 3.For racket areas in which predominantly bending stresses occur, an essentially rectangular hollow profile is particularly preferred. Such a rectangular hollow profile has a high bending resistance moment and is therefore particularly suitable for absorbing bending stresses. At the racket head 32 such bending stresses occur in particular in the area of the section line IX-IX, ie between two and four o'clock. Consequently, a rectangular cross-section is provided in the area of the section line IX-IX between the two circular or elliptical hollow sections on the section lines VIII-VIII and XX, the sections preferably flowing smoothly or continuously into one another. The aspect ratio L 9 : l 9 is preferably about 2.5 to 3.5 and in particular about 3.

An einem äußersten Kopfende 50 des Kopfbereichs 32 ist das in Fig. 8 dargestellte Kreis- oder Ellipsenprofil vorzugsweise zu einem schmäleren Ellipsenprofil mit einem Achsverhältnis von L8:l8 zwischen 2,5 und 3,5 und insbesondere von etwa 28:9 verjüngt. Dies ist zur Erzielung einer geringen Bauhöhe besonders vorteilhaft. At an outermost head end 50 of head portion 32 is shown in Fig circular or elliptical profile illustrated 8 preferably to a narrower ellipse profile with an axial ratio of 8 L: tapered. 9: l 8 between 2.5 and 3.5 and in particular of about 28. This is particularly advantageous in order to achieve a low overall height.

Zwischen den dem Griffabschnitt 36 zugewandten Enden 42 und 44 des Kopfbereichs 32, die das Kreis- oder Ellipsenprofil gemäß Fig. 10 aufweisen, und dem entlang der Linie XII-XII vorhandenen Kreis- oder Ellipsenprofil kann ebenfalls ein schmäleres Ellipsenprofil entsprechend Fig. 11 vorgesehen sein. Das Achsverhältnis L11:l11 in diesem Bereich liegt bevorzugt zwischen 2,5 und 3,5 und insbesondere bei etwa 3.A narrower ellipse profile corresponding to FIG. 11 can also be provided between the ends 42 and 44 of the head region 32 facing the handle section 36, which have the circular or elliptical profile according to FIG. 10, and the circular or elliptical profile along the line XII-XII , The axis ratio L 11 : L 11 in this range is preferably between 2.5 and 3.5 and in particular about 3.

Alle Übergänge zwischen den verschiedenen Profilarten und - abmessungen sind vorzugsweise fließend, so daß gefährliche Spannungsspitzen im Rahmen vermieden werden können. Der erfindungsgemäße Schläger 30 ist ferner bezüglich einer Mittelachse 52 im wesentlichen symmetrisch ausgebildet, so daß die vorstehend beschriebenen Querschnittsprofile zwischen null und sechs Uhr an entsprechenden Stellen zwischen zwölf und sechs Uhr vorgesehen sind.All transitions between the different profile types and - Dimensions are preferably fluid, so that dangerous Voltage peaks in the frame can be avoided. The Racket 30 according to the invention is also in relation to a central axis 52 essentially symmetrical, so that those described above Cross-sectional profiles between zero and six o'clock at appropriate points between twelve and six o'clock.

Obwohl für den erfindungsgemäßen Schläger 30 die jeweiligen Querschnittsprofile ohne eine Aussparung bzw. Vertiefung für einen Verschleißrahmen bzw. ein Kopfband dargestellt sind, kann eine solche Vertiefung um einen wesentlichen Teil des Außenumfangs des Schlägerkopfes 32 vorgesehen sein.Although for the racket 30 according to the invention Cross-sectional profiles without a recess or recess for one Wear frame or a headband are shown, such Indentation around a substantial part of the outer circumference of the club head 32 may be provided.

Als Material für den erfindungsgemäßen Schläger 30 sind alle bekannten Werkstoffe für Tennis-, Squash-, Badminton- und sonstige Schläger für Ballsportarten geeignet. Insbesondere ist der erfindungsgemäße Schläger 30 aus Holz, Metall, Metallegierungen, Kunststoff, Verbundwerkstoffen und Kombinationen daraus herstellbar.All known materials for the racket 30 according to the invention are known Materials for tennis, squash, badminton and other rackets for Suitable for ball sports. In particular, the racket 30 according to the invention is made of Wood, metal, metal alloys, plastic, composite materials and Combinations can be made from it.

Claims (17)

  1. A racket (30) for ball games having a frame comprising a racket head (32), a handle portion (36) and a throat area (34) located between the racket head (32) and the handle portion (36), wherein a profile forming the frame has different cross-sectional shapes on different frame positions according to the kinds of main stress occurring there, said cross-sectional shapes having moments of resistance being adapted to the respective kinds of stress, and wherein at least two bulge-like stiffening elements (51) are provided at the frame in the throat area (34) essentially symmetrically with respect to the longitudinal axis of the racket (30).
  2. The racket according to claim 1, wherein four bulge-like stiffening elements (51, 53) are provided, a first pair thereof being arranged with a stiffening element (53) in the area between four and six o'clock and with a stiffening element (51) in the throat area (34) of the racket (30), and a second pair thereof being arranged essentially symmetrically thereto.
  3. The racket according to claim 1 or 2, wherein the axial ratio in the area of a bulge-like stiffening element (51, 53) lies between 1.0 and 1.4, preferably between 1.2 and 1.35.
  4. The racket according to any one of claims 1 to 3, wherein the cross-sectional widths increase gradually from twelve to approximately three o'clock and symmetrically thereto between twelve and nine o'clock.
  5. The racket according to any one of claims 1 to 4, wherein the cross-sectional shape, which is adapted to the bending stress, is approximately a rectangular hollow profile.
  6. The racket according to any one of claims 1 to 5, wherein the cross-sectional shape, which is adapted to the torsional stress, is an essentially circular or elliptical hollow profile.
  7. The racket according to claim 5 or 6, wherein the rectangular profile has a side length ratio of 2.5 to 3.5 and preferably 3.0.
  8. The racket according to claim 6 or 7, wherein the elliptical profile has an axial ratio L:1 of 26:15 to 30:15 and preferably 28:15.
  9. The racket according to any one of claims 5 to 8, wherein the rectangular profile is formed in the area of the racket head between two and four o'clock and between eight and ten o'clock, and the circular or elliptical profile is formed in the area of the racket head between ten and two o'clock.
  10. The racket according to claim 9, wherein the rectangular profile is formed in the area of the racket head at three and nine o'clock.
  11. The racket according to any one of claims 5 to 10, wherein the circular or elliptical profile is formed in the area between approximately four and eight o'clock.
  12. The racket according to any one of claims 1 to 11, wherein the profile forming the frame is hollow.
  13. The racket according to any one of claims 1 to 12, wherein an elliptical profile having an axial ratio L:1 of 2.5 to 3.5 and preferably 28:9 is provided in the area of an outermost head end (50) of the head area (32) between eleven and one o'clock.
  14. The racket according to any one of claims 1 to 13, wherein a rectangular, circular or elliptical profile is formed in the throat area (34).
  15. The racket according to claim 14, wherein the circular or elliptical profile has a decreasing axial ratio in the throat area (34) away from the head area (32).
  16. The racket according to any one of claims 1 to 15, wherein the transitions between the individual shapes of the cross-sectional profiles are smooth.
  17. The racket according to any one of claim 1 to 16, wherein a groove for receiving a head band is provided at least in portions of an outer edge of the racket head (32).
EP00123052A 1999-11-08 2000-10-24 Racket for ball games Expired - Lifetime EP1097730B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19953626A DE19953626B4 (en) 1999-11-08 1999-11-08 Rackets for ball games
DE19953626 1999-11-08

Publications (2)

Publication Number Publication Date
EP1097730A1 EP1097730A1 (en) 2001-05-09
EP1097730B1 true EP1097730B1 (en) 2004-10-20

Family

ID=7928253

Family Applications (1)

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EP00123052A Expired - Lifetime EP1097730B1 (en) 1999-11-08 2000-10-24 Racket for ball games

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EP (1) EP1097730B1 (en)
CN (1) CN1158116C (en)
AT (1) ATE279962T1 (en)
DE (3) DE19953626B4 (en)
TW (1) TW487589B (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102006004863B4 (en) * 2006-02-02 2007-12-27 Head Technology Gmbh Racket for ball games
DE102007056831A1 (en) 2007-11-26 2009-05-28 Head Technology Gmbh Racket with joint

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10304797B4 (en) * 2003-02-05 2007-02-01 Völkl Tennis GmbH Ball game rackets, in particular tennis rackets
DE10308532B3 (en) * 2003-02-27 2004-10-21 Head Technology Ges.M.B.H. Rackets for ball games
ATE403473T1 (en) 2005-11-29 2008-08-15 Prince Sports Inc SPORT RACKET WITH FRAME CONSISTING OF SEVERAL SECTIONS

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Publication number Priority date Publication date Assignee Title
US2282195A (en) * 1941-02-05 1942-05-05 Compte John M Le Racket
DE3434898A1 (en) * 1984-09-22 1986-04-17 Siegfried 7770 Überlingen Kuebler BULLETS FOR GAMES WITH LIMITED ELASTIC BALL
DE3910871A1 (en) * 1988-04-06 1989-10-19 Prince Mfg Racket for ball games, especially tennis racket
US4997186A (en) * 1989-12-08 1991-03-05 Ferrari Importing Company, Inc. Racket frame having multi-dimensional cross-sectional construction
US5540434A (en) * 1990-08-21 1996-07-30 Wilson Sporting Goods Co. Tennis racket
DE4116901A1 (en) * 1991-05-23 1992-11-26 Donnay Int Sa Tennis racket with stiff head on flexible connecting arm
US5299801A (en) * 1991-05-23 1994-04-05 Donnay International S.A. Tennis racket
DE9205164U1 (en) * 1992-04-14 1992-06-11 Tseng, Kuni, Taipeh/T'ai-Pei, Tw
US5312102A (en) * 1993-02-04 1994-05-17 Lisco, Inc. Variable inertia head racket
US5810683A (en) * 1996-12-23 1998-09-22 Prince Sports Group, Inc. Morph frame for sports racquet

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102006004863B4 (en) * 2006-02-02 2007-12-27 Head Technology Gmbh Racket for ball games
DE102007056831A1 (en) 2007-11-26 2009-05-28 Head Technology Gmbh Racket with joint
US8282513B2 (en) 2007-11-26 2012-10-09 Head Technology Gmbh Racket comprising a joint
DE102007056831B4 (en) * 2007-11-26 2015-10-22 Head Technology Gmbh Racket with joint

Also Published As

Publication number Publication date
CN1158116C (en) 2004-07-21
DE50008315D1 (en) 2004-11-25
TW487589B (en) 2002-05-21
DE19953626A1 (en) 2001-06-21
EP1097730A1 (en) 2001-05-09
ATE279962T1 (en) 2004-11-15
DE19953626B4 (en) 2004-02-05
CN1294934A (en) 2001-05-16
DE20023541U1 (en) 2004-10-07

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