EP1570883B1 - Racquet for ball games and manufacturing processes - Google Patents

Racquet for ball games and manufacturing processes Download PDF

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Publication number
EP1570883B1
EP1570883B1 EP05004225A EP05004225A EP1570883B1 EP 1570883 B1 EP1570883 B1 EP 1570883B1 EP 05004225 A EP05004225 A EP 05004225A EP 05004225 A EP05004225 A EP 05004225A EP 1570883 B1 EP1570883 B1 EP 1570883B1
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EP
European Patent Office
Prior art keywords
racket
clock
dampening
layers
layer
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EP05004225A
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German (de)
French (fr)
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EP1570883A1 (en
Inventor
Johannes Mauser
Klaus Rambach
Manfred Emberger
Johan Kotze
Herfried Lammer
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Head Technology GmbH
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Head Technology GmbH
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    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B59/00—Bats, rackets, or the like, not covered by groups A63B49/00 - A63B57/00
    • 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
    • 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
    • A63B2102/02—Tennis
    • 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
    • A63B60/54—Details or accessories of golf clubs, bats, rackets or the like with means for damping vibrations

Definitions

  • the present invention relates to a racket for ball games, in particular a tennis, squash, badminton, racquetball or Paddletennistrainr, with excellent handling characteristics, and a manufacturing method for such a racket.
  • Such clubs typically include a frame that forms a club head and a handle portion connected thereto.
  • a so-called heart region is formed in the transition region between the club head and the grip section.
  • the frame is formed of a frame profile or hollow profile, which is made of a carbon fiber reinforced plastic material in a molding press.
  • the club head of the racket defines a clothing plane in which the clothing of the racket is placed. To accommodate the strings of the covering lying through holes are provided on the frame in the stringing level for the performance of stringed strings.
  • both the "impact” generated during the ball impact and vibrations are transmitted from the head portion of the racket via the grip portion to the player's arm. This can be uncomfortable and may lead to physical problems (such as tennis elbow).
  • this racket is based on the idea of not providing a direct connection between the head area and the gripping area of the racket, over which shocks and vibrations can be transmitted.
  • this racket is divided into three parts, namely a head area, a connection area and a grip section.
  • the EP 0 441 971 B2 discloses a racket having a frame portion, a neck portion and a handle portion.
  • a vibration reducing material is used as part of the material forming the grip portion or forming the neck portion and the grip portion or forming the frame portion, the neck portion and the grip portion.
  • the main body of the racket may be formed by so-called prepregs, for example, by winding a plurality of prepreg layers around a core while winding a sheet of the vibration-reducing material over it.
  • additional layers of the prepreg may be wound over it.
  • the present invention has for its object to provide an improved racket for ball games, which has excellent damping properties against shocks and vibrations. This object is achieved with a racket having the features of independent claim 1.
  • a racket having the features of independent claim 1.
  • Independent claim 17 relates to a production process for the racket according to the invention. Preferred embodiments of the manufacturing method are laid down in the dependent claims.
  • the racquet for ball games according to the invention has a frame which has a club head and a handle portion connected thereto via a heart area.
  • the frame is formed by winding a plurality of layers of sheet material as a hollow profile.
  • a plurality of damping layers are provided in pairs substantially symmetrically to the longitudinal axis of the racket, which are wrapped between the layers forming the hollow profile.
  • damping layer is to be understood to mean that it is preferably a shock and / or vibration absorbing material, such as rubber or synthetic rubbers.
  • Preferred materials are polyisoprenes, styrene-butadiene rubbers, polychloroprenes or urethane rubbers.
  • the hardness of the damping material forming the damping layers is preferably greater than 30 Shore A, more preferably the hardness is approximately in the range between 65 and 75 Shore A, in particular at about 70 Shore A.
  • a dial of a conventional watch is usually used, with the twelve o'clock position (XII) at the outermost free end of the racket, ie at the end opposite the handle portion.
  • the three o'clock position or nine o'clock position is usually provided in the middle of the longitudinal extent of the clubhead (see Fig. 1a).
  • a damping position is in the range between 4 o'clock and 6 o'clock, in particular at about 5 o'clock, and a further damping position is substantially symmetrical thereto between 6 o'clock and 8 o'clock, in particular at about 7 o'clock.
  • the cushioning layers are preferably made of a sheet or sheet material of suitable dimensions in length, width and thickness, the cushioning material preferably being a rectangular piece of sheet material.
  • the damping material in particular the damping material forming the damping layers between 4 o'clock and 6 o'clock or between 6 o'clock and 8 o'clock, preferably has a thickness in the range between 0.05 mm and 0.3 mm, more preferably between 0.15 mm and 0.25 mm, and most preferably about 0.2 mm.
  • the width of the damping material i. the extent in the winding direction, is preferably such that the damping material in the wound state over at least one, preferably two or more windings in the cross section of the frame profile extends to form the damping layers.
  • the damping material in particular the damping layers forming the damping layers between 4 o'clock and 6 o'clock or between 6 o'clock and 8 o'clock, preferably a width in the range between 30 mm and 150 mm, more preferably between 70 mm and 140 mm, strongest preferably between 80 mm and 130 mm, on.
  • the width and thickness of the damping material are preferably selected so that the sum of the thicknesses of the individual layers of the damping material per wall of the frame profile in the finished frame preferably in the range of about 0.1 mm to 0.6 mm, preferably 0.3 mm to 0th , 5 mm.
  • the length of the damping layers, in particular the damping layers provided between 4 o'clock and 6 o'clock or 6 o'clock and 8 o'clock, along the frame profile is preferably in the range between 20 mm and 150 mm, more preferably between 40 mm and 110 mm.
  • the dimensions of the damping material are selected as a function of the size of the striking surface and / or the circumference of the frame profile in the region of the damping layers.
  • the damping material for example a length along the frame of 90 mm to 130 mm, preferably 105 mm to 115 mm, more preferably about 110 mm.
  • the width of the damping material in the winding direction is approximately in the range between 110 mm and 150 mm, preferably between 125 mm and 135 mm, more preferably approximately 130 mm.
  • At least one, preferably two to three, windings can be realized with the damping material having the above dimensions.
  • the cushioning material has a length along the frame of 60 mm to 100 mm, preferably 75 mm to 85 mm, more preferably about 80 mm.
  • the width of the damping material in the winding direction is approximately in the range between 60 mm and 100 mm, preferably between 75 mm and 85 mm, more preferably at about 80 mm.
  • a frame height of about 21 mm to 25 mm and a circumference of the frame profile in the region of the damping layer (at 4 o'clock) of about 69 mm at least one, preferably one to two, windings can be realized with the damping material having the above dimensions.
  • the cushioning material has a length along the frame of 20 mm to 60 mm, preferably 35 mm to 45 mm, more preferably about 40 mm.
  • the width of the damping material in the winding direction is approximately in the range between 60 mm and 100 mm, preferably between 75 mm and 85 mm, more preferably at about 80 mm.
  • a frame height of about 19 mm and a circumference of the frame profile in the region of the damping position (at 4 o'clock) of about 50 mm at least one, preferably two, windings can be realized with the damping material having the above dimensions.
  • damping layers Another advantageous possibility of forming the damping layers is to provide a plurality of strips of damping material, which are advantageously aligned parallel to each other.
  • the strips may be wound to partially overlap one another, at least in the marginal areas, with the material forming the frame (eg, carbon fiber layers) therebetween.
  • the width of the strips is typically in the range between 3 mm and 10 mm, more preferably between 5 mm and 7 mm. These streaks can also effectively absorb the shock or vibration energy To ensure excellent damping properties, while weight can be saved.
  • the invention further relates to a process for the production of a racket, to which first a windable sheet material, e.g. Carbon or carbon webs are provided, on which a web-shaped damping material is placed. Subsequently, the layer material with the damping material positioned thereon at least in sections is wound into a tube, which is then formed into a frame profile forming the frame.
  • a molding press is used, in which the tube is inserted and is formed under the action of pressure and temperature.
  • the frame formed in this way has a club head and a grip section connected therewith over a heart area, wherein at least one damping layer wrapped between the layers forming the hollow profile is provided on the club head and / or in the heart area.
  • the racket according to the invention has the particular advantage that it has excellent damping properties. At the same time, the production of the racket is relatively simple and therefore inexpensive.
  • the racket 2 is formed from a frame 4 and has a club head 6 and a grip section 10 connected thereto via a heart area 8.
  • the frame 4 is formed of a hollow profile, which is made by winding a plurality of layers. These are usually first flexible web-like Materials such as carbon or carbon sheets used, which are usually superimposed at an angle of ⁇ 45 ° to the frame direction. The superimposed materials are rolled into a "tube", so that there are several superimposed windings of the web material. This tube is then formed in a molding press under the action of pressure and temperature to form a frame hollow profile.
  • the racket 2 has at least one damping material wrapped between the layers forming the hollow profile and, as shown in FIG. 2, forms a damping layer 12 in the finished racket.
  • the damping layer 12 is disposed between two adjacent layers 14 and 16 of the sheet forming the frame.
  • the racket 2 on a pair of damping layers 12a, 12b which are arranged substantially symmetrically to the longitudinal axis of the racket 2.
  • the damping layer 12a is approximately in the range between 4 o'clock and 6 o'clock. It is particularly preferred to form the damping layer 12a at about 5 o'clock.
  • the symmetrically arranged damping layer 12b is approximately in the range between 6 o'clock and 8 o'clock. It is particularly advantageous to provide the damping layer 12b at about 7 o'clock on the club head.
  • the first pair of damping layers 12a, 12b is arranged as in the embodiment according to FIG. 1a.
  • the second pair of damping layers 12 c, 12 d is provided closer to a free end 18 of the club head 6.
  • the damping layer 12c is approximately in the range between 9 o'clock and 11 o'clock, wherein a position at about 10 o'clock is particularly preferred.
  • the damping layer 12d is preferably between 1 o'clock and 3 o'clock, more preferably at about 2 o'clock.
  • the damping material preferably has a thickness in the range between 0.05 mm and 0.3 mm, more preferably between 0.15 mm and 0.25 mm, and particularly preferably about 0.2 mm.
  • the width of the damping material in the winding direction is preferably such that the damping layer 12 extends at least once around the circumference of the frame 4 forming the hollow profile, ie, having at least one winding. However, it is more preferred to dimension the width such that the damping material extends over at least two windings.
  • the damping material preferably a width in the range between 30 mm and 150 mm, more preferably between 70 mm and 140 mm, and most preferably between 80 mm and 130 mm.
  • the length L of the damping layer 12 in the direction of the frame extension is preferably in the range between 20 mm and 150 mm, more preferably between 40 mm and 110 mm.
  • Das damping material may be formed in the form of a plurality of strips 20 according to the embodiment shown schematically in Figure 3.
  • the strips 20 are preferably arranged parallel to each other and together form a damping layer 12, which are preferably in their dimensions in the range of the above-described continuous damping layer.
  • the strips 20 of the damping layer 12 are preferably formed by cutting out a plurality of parallel recesses 22 from an approximately rectangular piece of the damping material. This results in mutually parallel and along the circumference of the rectangle interconnected strip 20. This damping material 12 can thus also be handled as an integral element.
  • the individual strips 20 preferably have a length 1 in the range between 3 mm and 10 mm, more preferably between 5 mm and 7 mm.
  • the inventive effect of the improved damping is ensured even with this strip-shaped design of the damping layer 12, since the individual strips 20 also reduce the shear stresses occurring between adjacent layers 14, 16.
  • the individual strips 20 may be provided perpendicular to the extension of the frame at the relevant point. But it may also be advantageous to provide the strips 20 at an angle relative to the winding direction, so that adjacent strips can at least partially overlap in the wound state. Suitable angles for winding the damping material are preferably in the range between 0 ° and 45 °, preferably between 5 ° and 15 ° to the frame longitudinal direction. In this arrangement as well, shear stresses between adjacent layers 14, 16 of the layer material forming the frame 4 are effectively reduced.
  • the racket 2 according to the invention has essentially the advantage that it has excellent damping properties despite its integral or one-piece design, while being easy to produce at the same time.
  • Figure 4 is an illustration showing how the position and size of cushioning layers on the clubhead affect the deformation of the racket under load.
  • the diagram shows the deformation in millimeters of the racket at a specific measuring point.
  • the measuring point is shown on the x-axis of the diagram, wherein the respective measuring point is defined as the distance from the extreme head end of the racket.
  • On the y-axis the deformation is shown in millimeters.
  • three different clubs were tested, namely a first one with the designation "175-R0-H0" (dark gray curve), a second one with the designation "175-R55-H0" (light gray curve) and a third one with the designation "175-R110-H0" (white curve).
  • the term “175" is a name of the racket.
  • the term “Rx” provides information about the length L of the damping layer in the direction of the frame extension. That is, “R0” refers to a racket without a cushioning layer, “R55” refers to a racket having a cushioning layer having a length of 55 mm, and “R110” refers to a racket having a cushioning layer having a length of 110 mm.
  • the damping positions are each provided at about 5 o'clock or 7 o'clock, ie in the range between 4 o'clock and 6 o'clock or 6 o'clock and 8 o'clock.
  • the racket according to the invention is thus clearly superior to rackets without damping layer in terms of its handling properties. Furthermore, the racket according to the invention is also significantly improved with respect to racquets with provided in the grip portion damping layers in terms of its handling, since in rackets with damping layers in the handle portion is a relatively soft racket in the region of the handle. While this may result in an effective way of damping, it is also accompanied by a loss of clout.

Abstract

A frame (4) has a racket head (6) to which a handle (10) is connected through a heart region (8). Multiple layers are wound to form the hollow profile of the frame. At least one dampening layer (12a,12b) is included in one or both of the racket head and heart region and is wrapped between the multiple layers. An independent claim is also included for a racket producing process.

Description

Die vorliegende Erfindung betrifft einen Schläger für Ballspiele, insbesondere einen Tennis-, Squash-, Badminton-, Racketball- oder Paddletennisschläger, mit hervorragenden Handlingeigenschaften, sowie ein Herstellungsverfahren für einen derartigen Schläger.The present invention relates to a racket for ball games, in particular a tennis, squash, badminton, racquetball or Paddletennisschläger, with excellent handling characteristics, and a manufacturing method for such a racket.

Derartige Schläger weisen typischerweise einen Rahmen auf, der einen Schlägerkopf und einen damit verbundenen Griffabschnitt bildet. Typischerweise ist im Übergangsbereich zwischen dem Schlägerkopf und dem Griffabschnitt ein sogenannter Herzbereich ausgebildet. Üblicherweise ist der Rahmen aus einem Rahmenprofil bzw. Hohlprofil gebildet, das aus einem kohlefaserverstärkten Kunststoffmaterial in einer Formpresse hergestellt wird. Der Schlägerkopf des Schlägers definiert dabei eine Bespannungsebene, in der die Bespannung des Schlägers angeordnet wird. Zur Aufnahme der Saiten der Bespannung werden am Rahmen in der Bespannungsebene liegende Durchgangslöcher zur Durchführung von Bespannungssaiten vorgesehen.Such clubs typically include a frame that forms a club head and a handle portion connected thereto. Typically, a so-called heart region is formed in the transition region between the club head and the grip section. Usually, the frame is formed of a frame profile or hollow profile, which is made of a carbon fiber reinforced plastic material in a molding press. The club head of the racket defines a clothing plane in which the clothing of the racket is placed. To accommodate the strings of the covering lying through holes are provided on the frame in the stringing level for the performance of stringed strings.

Wenn mit einem derartigen Schläger ein Ball geschlagen wird, werden sowohl der beim Ballaufprall entstehende "Stoß" als auch Vibrationen vom Kopfbereich des Schlägers über den Griffabschnitt auf den Arm des Spielers übertragen. Dies kann unangenehm sein und unter Umständen zu körperlichen Problemen (z.B. Tennisarm) führen.When a ball is struck with such a racket, both the "impact" generated during the ball impact and vibrations are transmitted from the head portion of the racket via the grip portion to the player's arm. This can be uncomfortable and may lead to physical problems (such as tennis elbow).

Es wurden vielerlei Versuche unternommen, die Übertragung von Stößen und Vibrationen auf den Arm des Spielers zu reduzieren. So beschreibt beispielsweise die US-A-4 609 198 einen Schläger, bei dem ein rohrförmiges Dämpfungselement im Griff des Schlägers vorgesehen ist. Ein neuerer Versuch zur Reduzierung der Übertragung von Stößen und Vibrationen auf den Arm des Spielers ist in der US-A-2003/0036448 beschrieben. Dieser Schläger weist einen Kopfabschnitt mit einem davon getrennten Griffabschnitt auf. Die Verbindung zwischen dem Kopfabschnitt und dem Griffabschnitt wird durch ein stoß- bzw. vibrationsabsorbierendes Material, wie z.B. Urethan oder Gummi, realisiert, durch das die Übertragung von Stößen und Vibrationen vom Kopfabschnitt zum Griffabschnitt reduziert werden soll. Demgemäß basiert dieser Schläger auf der Überlegung, keine direkte Verbindung zwischen dem Kopfbereich und dem Griffbereich des Schlägers vorzusehen, über die Stöße und Vibrationen übertragen werden können. Mit anderen Worten, ist dieser Schläger dreigeteilt, nämlich in einen Kopfbereich, einen Verbindungsbereich und einen Griffabschnitt.Many attempts have been made to reduce the transmission of shock and vibration to the player's arm. For example, describes the US-A-4,609,198 a racket in which a tubular damping element is provided in the handle of the racket. A recent attempt to reduce the transmission of shock and vibration to the arm of the player is in the US-A-2003/0036448 described. This racket has a head portion with a separate handle portion. The connection between the head portion and the grip portion is realized by a shock absorbing material such as urethane or rubber, by which the transmission of shock and vibration from the head portion to the grip portion is to be reduced. Accordingly, this racket is based on the idea of not providing a direct connection between the head area and the gripping area of the racket, over which shocks and vibrations can be transmitted. In other words, this racket is divided into three parts, namely a head area, a connection area and a grip section.

Die EP 0 441 971 B2 offenbart einen Schläger mit einem Rahmenabschnitt, einem Halsabschnitt und einem Griffabschnitt. Ein schwingungsverringerndes Material wird als Teil des Materials verwendet, das den Griffabschnitt bildet oder den Halsabschnitt und den Griffabschnitt bildet oder den Rahmenabschnitt, den Halsabschnitt und den Griffabschnitt bildet. Der Hauptkörper des Schlägers kann durch sogenannte Prepregs gebildet werden, beispielsweise indem mehrere Prepregschichten um einen Kern gewickelt werden, wobei eine Folie des vibrationsverringernden Materials darüber gewickelt wird. Gegebenenfalls können zusätzliche Lagen des Prepregs darüber gewickelt werden.The EP 0 441 971 B2 discloses a racket having a frame portion, a neck portion and a handle portion. A vibration reducing material is used as part of the material forming the grip portion or forming the neck portion and the grip portion or forming the frame portion, the neck portion and the grip portion. The main body of the racket may be formed by so-called prepregs, for example, by winding a plurality of prepreg layers around a core while winding a sheet of the vibration-reducing material over it. Optionally, additional layers of the prepreg may be wound over it.

Der vorliegenden Erfindung liegt die Aufgabe zugrunde, einen verbesserten Schläger für Ballspiele bereitzustellen, der hervorragende Dämpfungseigenschaften gegenüber Stößen und Vibrationen aufweist. Diese Aufgabe wird mit einem Schläger mit den Merkmalen des unabhängigen Anspruchs 1 gelöst. In den abhängigen Ansprüchen sind bevorzugte Ausführungsformen des erfindungsgemäßen Schlägers beschrieben. Der unabhängige Anspruch 17 betrifft ein Herstellungsverfahren für den erfindungsgemäßen Schläger. Bevorzugte Ausgestaltungen des Herstellungsverfahrens sind in den abhängigen Ansprüchen niedergelegt.The present invention has for its object to provide an improved racket for ball games, which has excellent damping properties against shocks and vibrations. This object is achieved with a racket having the features of independent claim 1. In the dependent claims preferred embodiments of the racket according to the invention are described. Independent claim 17 relates to a production process for the racket according to the invention. Preferred embodiments of the manufacturing method are laid down in the dependent claims.

Der erfindungsgemäße Schläger für Ballspiele weist einen Rahmen auf, der einen Schlägerkopf und einen damit über einen Herzbereich verbundenen Griffabschnitt hat. Der Rahmen ist durch Wickeln mehrerer Lagen von Bahnenmaterial als Hohlprofil ausgebildet. Am Schlägerkopf des erfindungsgemäßen Schlägers sind mehrere Dämpfungslagen paarweise im wesentlichen symmetrisch zur Längsachse des Schlägers vorgesehen, die zwischen die das Hohlprofil bildenden Lagen eingewickelt sind.The racquet for ball games according to the invention has a frame which has a club head and a handle portion connected thereto via a heart area. The frame is formed by winding a plurality of layers of sheet material as a hollow profile. At the club head of the racket according to the invention a plurality of damping layers are provided in pairs substantially symmetrically to the longitudinal axis of the racket, which are wrapped between the layers forming the hollow profile.

Der Begriff "Dämpfungslage" ist dahingehend zu verstehen, daß es sich dabei vorzugsweise um ein stoß- und/oder vibrationsabsorbierendes Material handelt, wie beispielsweise Gummi bzw. synthetische Kautschuke. Bevorzugte Materialien sind Polyisoprene, Styrol-Butadienkautschuke, Polychloroprene oder Urethankautschuke. Die Härte des die Dämpfungslagen bildenden Dämpfungsmaterials ist vorzugsweise größer als 30 Shore A, besonders bevorzugt liegt die Härte etwa im Bereich zwischen 65 und 75 Shore A, insbesondere bei etwa 70 Shore A.The term "damping layer" is to be understood to mean that it is preferably a shock and / or vibration absorbing material, such as rubber or synthetic rubbers. Preferred materials are polyisoprenes, styrene-butadiene rubbers, polychloroprenes or urethane rubbers. The hardness of the damping material forming the damping layers is preferably greater than 30 Shore A, more preferably the hardness is approximately in the range between 65 and 75 Shore A, in particular at about 70 Shore A.

Zur Bestimmung von Positionen am Schlägerkopf wird üblicherweise ein Ziffernblatt einer herkömmlichen Uhr verwendet, wobei die Zwölf-Uhr-Position (XII) am äußersten freien Ende des Schlägers, d.h. an dem dem Griffabschnitt gegenüberliegenden Ende, vorgesehen ist. Die Drei-Uhr-Position bzw. Neun-Uhr-Position ist üblicherweise in der Mitte der Längserstreckung des Schlägerkopfes vorgesehen (vgl. Fig. 1a).To determine positions on the club head, a dial of a conventional watch is usually used, with the twelve o'clock position (XII) at the outermost free end of the racket, ie at the end opposite the handle portion. The three o'clock position or nine o'clock position is usually provided in the middle of the longitudinal extent of the clubhead (see Fig. 1a).

Erfindungsgemäß liegt eine Dämpfungslage im Bereich zwischen 4 Uhr und 6 Uhr, insbesondere bei etwa 5 Uhr, und eine weitere Dämpfungslage im wesentlichen symmetrisch dazu zwischen 6 Uhr und 8 Uhr, insbesondere bei etwa 7 Uhr. Somit ergibt sich eine paarweise Anordnung von Dämpfungslagen im Bereich zwischen 4 Uhr und 6 Uhr, insbesondere bei etwa 5 Uhr, und gegenüberliegend zwischen 6 Uhr und 8 Uhr, insbesondere bei etwa 7 Uhr. Des weiteren kann es vorteilhaft sein, ein weiteres Paar Dämpfungslagen im Bereich zwischen 1 Uhr und 3 Uhr, insbesondere bei etwa 2 Uhr, bzw. zwischen 9 Uhr und 11 Uhr, insbesondere bei etwa 10 Uhr, am Schlägerkopf vorzusehen. Die Dämpfungslagen bestehen vorzugsweise aus einem blatt- oder bogenförmigen Bahnenmaterial mit geeigneten Abmessungen hinsichtlich Länge, Breite und Dicke, wobei das Dämpfungsmaterial vorzugsweise ein recheckiges Stück Bahnenmaterial ist.According to the invention, a damping position is in the range between 4 o'clock and 6 o'clock, in particular at about 5 o'clock, and a further damping position is substantially symmetrical thereto between 6 o'clock and 8 o'clock, in particular at about 7 o'clock. This results in a paired arrangement of damping layers in the range between 4 o'clock and 6 o'clock, in particular at about 5 o'clock, and opposite between 6 o'clock and 8 o'clock, in particular at about 7 o'clock. Furthermore, it may be advantageous to provide a further pair of damping layers in the range between 1 o'clock and 3 o'clock, in particular at about 2 o'clock, or between 9 o'clock and 11 o'clock, in particular at about 10 o'clock, at the club head. The cushioning layers are preferably made of a sheet or sheet material of suitable dimensions in length, width and thickness, the cushioning material preferably being a rectangular piece of sheet material.

Das Dämpfungsmaterial, insbesondere das die zwischen 4 Uhr und 6 Uhr bzw. zwischen 6 Uhr und 8 Uhr gelegenen Dämpfungslagen bildende Dämpfungsmaterial, hat vorzugsweise eine Dicke im Bereich zwischen 0,05 mm und 0,3 mm, stärker bevorzugt zwischen 0,15 mm und 0,25 mm, und am stärksten bevorzugt von etwa 0,2 mm.The damping material, in particular the damping material forming the damping layers between 4 o'clock and 6 o'clock or between 6 o'clock and 8 o'clock, preferably has a thickness in the range between 0.05 mm and 0.3 mm, more preferably between 0.15 mm and 0.25 mm, and most preferably about 0.2 mm.

Die Breite des Dämpfungsmaterials, d.h. die Ausdehnung in Wickelrichtung, ist vorzugsweise so bemessen, daß sich das Dämpfungsmaterial im gewickelten Zustand über mindestens eine, vorzugsweise zwei oder mehr Wicklungen im Querschnitt des Rahmenprofils erstreckt, um die Dämpfungslagen auszubilden. Dazu weist das Dämpfungsmaterial, insbesondere das die zwischen 4 Uhr und 6 Uhr bzw. zwischen 6 Uhr und 8 Uhr gelegenen Dämpfungslagen bildende Dämpfungsmaterial, vorzugsweise eine Breite im Bereich zwischen 30 mm und 150 mm, stärker bevorzugt zwischen 70 mm und 140 mm, am stärksten bevorzugt zwischen 80 mm und 130 mm, auf. Die Breite und Dicke des Dämpfungsmaterials werden vorzugsweise so gewählt, dass die Summe der Dicken der einzelnen Lagen des Dämpfungsmaterials je Wandung des Rahmenprofils im fertigen Rahmen vorzugsweise im Bereich von etwa 0,1 mm bis 0,6 mm, bevorzugt 0,3 mm bis 0,5 mm liegt.The width of the damping material, i. the extent in the winding direction, is preferably such that the damping material in the wound state over at least one, preferably two or more windings in the cross section of the frame profile extends to form the damping layers. For this purpose, the damping material, in particular the damping layers forming the damping layers between 4 o'clock and 6 o'clock or between 6 o'clock and 8 o'clock, preferably a width in the range between 30 mm and 150 mm, more preferably between 70 mm and 140 mm, strongest preferably between 80 mm and 130 mm, on. The width and thickness of the damping material are preferably selected so that the sum of the thicknesses of the individual layers of the damping material per wall of the frame profile in the finished frame preferably in the range of about 0.1 mm to 0.6 mm, preferably 0.3 mm to 0th , 5 mm.

Die Länge der Dämpfungslagen, insbesondere der zwischen 4 Uhr und 6 Uhr bzw. 6 Uhr und 8 Uhr vorgesehenen Dämpfungslagen, entlang des Rahmenprofils liegt vorzugsweise im Bereich zwischen 20 mm und 150 mm, stärker bevorzugt zwischen 40 mm und 110 mm.The length of the damping layers, in particular the damping layers provided between 4 o'clock and 6 o'clock or 6 o'clock and 8 o'clock, along the frame profile is preferably in the range between 20 mm and 150 mm, more preferably between 40 mm and 110 mm.

Vorzugsweise werden die Abmessungen des Dämpfungsmaterials in Abhängigkeit von der Größe der Schlagfläche und/oder dem Umfang des Rahmenprofils im Bereich der Dämpfungslagen gewählt. Bei einem Schläger mit einer Schlagfläche von etwa 760 cm2 bzw. einem Innenumfang des Schlägerkopfes von etwa 992 mm hat das Dämpfungsmaterial beispielsweise eine Länge entlang des Rahmens von 90 mm bis 130 mm, vorzugsweise von 105 mm bis 115 mm, stärker bevorzugt von etwa 110 mm. Die Breite des Dämpfungsmaterials in Wickelrichtung liegt etwa im Bereich zwischen 110 mm und 150 mm, vorzugsweise zwischen 125 mm und 135 mm, stärker bevorzugt bei etwa 130 mm. Bei einer Rahmenhöhe von etwa 28 mm bis 30 mm und einem Umfang des Rahmenprofils im Bereich der Dämpfungslage (bei 4 Uhr) von etwa 71 mm kann mit dem Dämpfungsmaterial mit den vorstehenden Abmessungen mindestens eine, vorzugsweise zwei bis drei Wicklungen, realisiert werden.Preferably, the dimensions of the damping material are selected as a function of the size of the striking surface and / or the circumference of the frame profile in the region of the damping layers. In a racket with a clubface of about 760 cm 2 or an inner circumference of the club head of about 992 mm, the damping material, for example a length along the frame of 90 mm to 130 mm, preferably 105 mm to 115 mm, more preferably about 110 mm. The width of the damping material in the winding direction is approximately in the range between 110 mm and 150 mm, preferably between 125 mm and 135 mm, more preferably approximately 130 mm. With a frame height of about 28 mm to 30 mm and a circumference of the frame profile in the region of the damping position (at 4 o'clock) of about 71 mm, at least one, preferably two to three, windings can be realized with the damping material having the above dimensions.

Bei einem Schläger mit einer Schlagfläche von etwa 660 cm2 bzw. einem Innenumfang des Schlägerkopfes von etwa 925 mm hat das Dämpfungsmaterial beispielsweise eine Länge entlang des Rahmens von 60 mm bis 100 mm, vorzugsweise von 75 mm bis 85 mm, stärker bevorzugt von etwa 80 mm. Die Breite des Dämpfungsmaterials in Wickelrichtung liegt etwa im Bereich zwischen 60 mm und 100 mm, vorzugsweise zwischen 75 mm und 85 mm, stärker bevorzugt bei etwa 80 mm. Bei einer Rahmenhöhe von etwa 21 mm bis 25 mm und einem Umfang des Rahmenprofils im Bereich der Dämpfungslage (bei 4 Uhr) von etwa 69 mm kann mit dem Dämpfungsmaterial mit den vorstehenden Abmessungen mindestens eine, vorzugsweise ein bis zwei Wicklungen, realisiert werden.For example, in a club having a clubface of about 660 cm 2 or an inner circumference of the clubhead of about 925 mm, the cushioning material has a length along the frame of 60 mm to 100 mm, preferably 75 mm to 85 mm, more preferably about 80 mm. The width of the damping material in the winding direction is approximately in the range between 60 mm and 100 mm, preferably between 75 mm and 85 mm, more preferably at about 80 mm. With a frame height of about 21 mm to 25 mm and a circumference of the frame profile in the region of the damping layer (at 4 o'clock) of about 69 mm, at least one, preferably one to two, windings can be realized with the damping material having the above dimensions.

Bei einem Schläger mit einer Schlagfläche von etwa 600 cm2 bzw. einem Innenumfang des Schlägerkopfes von etwa 866 mm hat das Dämpfungsmaterial beispielsweise eine Länge entlang des Rahmens von 20 mm bis 60 mm, vorzugsweise von 35 mm bis 45 mm, stärker bevorzugt von etwa 40 mm. Die Breite des Dämpfungsmaterials in Wickelrichtung liegt etwa im Bereich zwischen 60 mm und 100 mm, vorzugsweise zwischen 75 mm und 85 mm, stärker bevorzugt bei etwa 80 mm. Bei einer Rahmenhöhe von etwa 19 mm und einem Umfang des Rahmenprofils im Bereich der Dämpfungslage (bei 4 Uhr) von etwa 50 mm kann mit dem Dämpfungsmaterial mit den vorstehenden Abmessungen mindestens eine, vorzugsweise zwei Wicklungen, realisiert werden.For example, in a club having a clubface of about 600 cm 2 or an inner circumference of the clubhead of about 866 mm, the cushioning material has a length along the frame of 20 mm to 60 mm, preferably 35 mm to 45 mm, more preferably about 40 mm. The width of the damping material in the winding direction is approximately in the range between 60 mm and 100 mm, preferably between 75 mm and 85 mm, more preferably at about 80 mm. With a frame height of about 19 mm and a circumference of the frame profile in the region of the damping position (at 4 o'clock) of about 50 mm, at least one, preferably two, windings can be realized with the damping material having the above dimensions.

Eine weitere vorteilhafte Möglichkeit der Ausbildung der Dämpfungslagen besteht darin, mehrere Streifen von Dämpfungsmaterial vorzusehen, die vorteilhafterweise parallel zueinander ausgerichtet sind. Die Streifen können so gewickelt werden, daß sie einander teilweise zumindest in den Randbereichen überlappen, wobei das den Rahmen bildende Material (z.B. Kohlefaserlagen) dazwischen liegen. Die Breite der Streifen liegt typischerweise im Bereich zwischen 3 mm und 10 mm, stärker bevorzugt zwischen 5 mm und 7 mm. Durch diese Streifen kann die Stoß- bzw. Vibrationsenergie ebenfalls effektiv absorbiert werden, um hervorragende Dämpfungseigenschaften zu gewährleisten, wobei gleichzeitig Gewicht eingespart werden kann.Another advantageous possibility of forming the damping layers is to provide a plurality of strips of damping material, which are advantageously aligned parallel to each other. The strips may be wound to partially overlap one another, at least in the marginal areas, with the material forming the frame (eg, carbon fiber layers) therebetween. The width of the strips is typically in the range between 3 mm and 10 mm, more preferably between 5 mm and 7 mm. These streaks can also effectively absorb the shock or vibration energy To ensure excellent damping properties, while weight can be saved.

Außerdem kann es vorteilhaft sein, zusätzlich im Herzbereich des Schlägers mindestens eine Dämpfungslage vorzusehen.In addition, it may be advantageous to additionally provide at least one damping layer in the heart region of the racquet.

Die Erfindung betrifft ferner ein Verfahren zur Herstellung eines Schlägers, wozu zunächst ein wickelbares Lagenmaterial, z.B. Kohlenstoff- bzw. Karbonbahnen, bereitgestellt werden, auf denen ein bahnförmiges Dämpfungsmaterial plaziert wird. Anschließend werden das Lagenmaterial mit dem darauf zumindest abschnittsweise positionierten Dämpfungsmaterial zu einem Schlauch gewickelt, der dann zu einem den Rahmen bildenden Rahmenprofil geformt wird. Dazu wird üblicherweise eine Formpresse verwendet, in die der Schlauch eingelegt wird und unter Einwirkung von Druck und Temperatur ausgeformt wird. Der so ausgebildete Rahmen weist einen Schlägerkopf und einen damit über ein Herzbereich verbundenen Griffabschnitt auf, wobei am Schlägerkopf und/oder im Herzbereich mindestens eine zwischen die das Hohlprofil bildenden Lagen eingewickelte Dämpfungslage vorgesehen ist.The invention further relates to a process for the production of a racket, to which first a windable sheet material, e.g. Carbon or carbon webs are provided, on which a web-shaped damping material is placed. Subsequently, the layer material with the damping material positioned thereon at least in sections is wound into a tube, which is then formed into a frame profile forming the frame. For this purpose, usually a molding press is used, in which the tube is inserted and is formed under the action of pressure and temperature. The frame formed in this way has a club head and a grip section connected therewith over a heart area, wherein at least one damping layer wrapped between the layers forming the hollow profile is provided on the club head and / or in the heart area.

Der erfindungsgemäße Schläger hat insbesondere den Vorteil, daß er hervorragende Dämpfungseigenschaften aufweist. Gleichzeitig ist die Herstellung des Schlägers relativ einfach und damit kostengünstig.The racket according to the invention has the particular advantage that it has excellent damping properties. At the same time, the production of the racket is relatively simple and therefore inexpensive.

Bevorzugte Ausführungsformen des erfindungsgemäßen Schlägers werden nachfolgend anhand der Zeichnungen beschrieben. Es zeigen:

Figur 1a
eine schematische Vorderansicht eines erfindungsgemäßen Schlägers, in der bevorzugte Positionen für die Dämpfungslagen dargestellt sind;
Figur 1b
eine Ansicht ähnlich Figur 1a, wobei bei dieser Ausführungsform des erfindungsgemäßen Schlägers zwei Paar Dämpfungslagen vorgesehen sind;
Figur 2
eine perspektivische Schnittansicht durch das Rahmenprofil eines erfindungsgemäßen Schlägers;
Figur 3
eine schematische Darstellung eines aus mehreren Streifen bestehenden Dämpfungsmaterials; und
Figur 4
eine Darstellung, aus der erkennbar ist, wie die Position und Größe von Dämpfungslagen die Verformung des Schlägers unter Last beeinflussen.
Preferred embodiments of the racket according to the invention are described below with reference to the drawings. Show it:
FIG. 1a
a schematic front view of a racket according to the invention, are shown in the preferred positions for the damping layers;
FIG. 1b
a view similar to Figure 1a, wherein in this embodiment of the racket according to the invention two pairs of damping layers are provided;
FIG. 2
a perspective sectional view through the frame profile of a racket according to the invention;
FIG. 3
a schematic representation of a multi-strip damping material; and
FIG. 4
a representation from which it can be seen how the position and size of damping layers affect the deformation of the racket under load.

Der erfindungsgemäße Schläger 2 ist aus einem Rahmen 4 gebildet und weist einen Schlägerkopf 6 und einen damit über einen Herzbereich 8 verbundenen Griffabschnitt 10 auf.The racket 2 according to the invention is formed from a frame 4 and has a club head 6 and a grip section 10 connected thereto via a heart area 8.

Wie in Figur 2 dargestellt, ist der Rahmen 4 aus einem Hohlprofil gebildet, das durch Wickeln mehrerer Lagen hergestellt wird. Dazu werden üblicherweise zunächst flexible bahnartige Materialien, wie z.B. Kohlenstoff- bzw. Karbonbahnen verwendet, die üblicherweise unter einem Winkel von ±45° zur Rahmenrichtung übereinander gelegt werden. Die übereinander liegenden Materialien werden zu einem "Schlauch" gerollt, so daß sich mehrere übereinander liegende Wicklungen des Bahnenmaterials ergeben. Dieser Schlauch wird dann in einer Formpresse unter Einwirkung von Druck und Temperatur zu einem den Rahmen bildenden Hohlprofil geformt.As shown in Figure 2, the frame 4 is formed of a hollow profile, which is made by winding a plurality of layers. These are usually first flexible web-like Materials such as carbon or carbon sheets used, which are usually superimposed at an angle of ± 45 ° to the frame direction. The superimposed materials are rolled into a "tube", so that there are several superimposed windings of the web material. This tube is then formed in a molding press under the action of pressure and temperature to form a frame hollow profile.

Erfindungsgemäß weist der Schläger 2 mindestens ein zwischen die das Hohlprofil bildenden Lagen eingewickeltes Dämpfungsmaterial auf, das wie in Figur 2 gezeigt im fertigen Schläger eine Dämpfungslage 12 bildet. Die Dämpfungslage 12 ist zwischen zwei benachbarten Lagen 14 und 16 des den Rahmen bildenden Bahnenmaterials angeordnet. Dadurch können zwischen den einzelnen Lagen 14 und 16 auftretende Schubspannungen mittels des Dämpfungsmaterials wirkungsvoll abgebaut werden.According to the invention, the racket 2 has at least one damping material wrapped between the layers forming the hollow profile and, as shown in FIG. 2, forms a damping layer 12 in the finished racket. The damping layer 12 is disposed between two adjacent layers 14 and 16 of the sheet forming the frame. As a result, shear stresses occurring between the individual layers 14 and 16 can be effectively reduced by means of the damping material.

Gemäß der in Figur 1a dargestellten Ausführungsform weist der Schläger 2 ein Paar Dämpfungslagen 12a, 12b auf, die im wesentlichen symmetrisch zur Längsachse des Schlägers 2 angeordnet sind. Wie in Figur 1a gezeigt, liegt die Dämpfungslage 12a etwa im Bereich zwischen 4 Uhr und 6 Uhr. Besonders bevorzugt ist es, die Dämpfungslage 12a bei etwa 5 Uhr auszubilden. Die symmetrisch dazu angeordnete Dämpfungslage 12b liegt etwa im Bereich zwischen 6 Uhr und 8 Uhr. Besonders vorteilhaft ist es, die Dämpfungslage 12b bei etwa 7 Uhr am Schlägerkopf vorzusehen.According to the embodiment shown in Figure 1a, the racket 2 on a pair of damping layers 12a, 12b, which are arranged substantially symmetrically to the longitudinal axis of the racket 2. As shown in Figure 1a, the damping layer 12a is approximately in the range between 4 o'clock and 6 o'clock. It is particularly preferred to form the damping layer 12a at about 5 o'clock. The symmetrically arranged damping layer 12b is approximately in the range between 6 o'clock and 8 o'clock. It is particularly advantageous to provide the damping layer 12b at about 7 o'clock on the club head.

Bei der in Figur 1b gezeigten Ausführungsform des erfindungsgemäßen Schlägers 2 sind am Schlägerkopf 6 zwei Paare von Dämpfungslagen vorgesehen. Das erste Paar Dämpfungslagen 12a, 12b ist wie bei der Ausführungsform gemäß Figur 1a angeordnet. Das zweite Paar Dämpfungslagen 12c, 12d ist näher zu einem freien Ende 18 des Schlägerkopfes 6 vorgesehen. Vorzugsweise liegt die Dämpfungslage 12c etwa im Bereich zwischen 9 Uhr und 11 Uhr, wobei eine Position bei etwa 10 Uhr besonders bevorzugt ist. Die Dämpfungslage 12d liegt vorzugsweise zwischen 1 Uhr und 3 Uhr, besonders bevorzugt bei etwa 2 Uhr.In the embodiment of the racket 2 according to the invention shown in FIG. 1b, two pairs of damping layers are provided on the racket head 6. The first pair of damping layers 12a, 12b is arranged as in the embodiment according to FIG. 1a. The second pair of damping layers 12 c, 12 d is provided closer to a free end 18 of the club head 6. Preferably, the damping layer 12c is approximately in the range between 9 o'clock and 11 o'clock, wherein a position at about 10 o'clock is particularly preferred. The damping layer 12d is preferably between 1 o'clock and 3 o'clock, more preferably at about 2 o'clock.

Das Dämpfungsmaterial weist vorzugsweise eine Dicke im Bereich zwischen 0,05 mm und 0,3 mm, stärker bevorzugt zwischen 0,15 mm und 0,25 mm, und besonders bevorzugt von etwa 0,2 mm auf. Die Breite des Dämpfungsmaterials in Wickelrichtung ist vorzugsweise so bemessen, daß sich die Dämpfungslage 12 mindestens einmal um den Umfang des den Rahmen 4 bildenden Hohlprofils erstreckt, d.h. mindestens eine Wicklung aufweist. Es ist allerdings stärker bevorzugt, die Breite derart zu bemessen, daß sich das Dämpfungsmaterial über mindestens zwei Wicklungen erstreckt. Dazu hat das Dämpfungsmaterial vorzugsweise eine Breite im Bereich zwischen 30 mm und 150 mm, stärker bevorzugt zwischen 70 mm und 140 mm, und am stärksten bevorzugt zwischen 80 mm und 130 mm.Die Länge L der Dämpfungslage 12 in Richtung der Rahmenerstreckung liegt vorzugsweise im Bereich zwischen 20 mm und 150 mm, stärker bevorzugt zwischen 40 mm und 110 mm.Das Dämpfungsmaterial kann gemäß der in Figur 3 schematisch dargestellten Ausführungsform auch in Form mehrerer Streifen 20 ausgebildet sein. Die Streifen 20 sind vorzugsweise parallel zueinander angeordnet und bilden zusammen eine Dämpfungslage 12, die in ihren Abmessungen vorzugsweise im Bereich der vorstehend beschriebenen durchgehenden Dämpfungslage liegen. Wie in Figur 3 gezeigt, sind die Streifen 20 der Dämpfungslage 12 vorzugsweise dadurch ausgebildet, dass aus einem etwa rechteckigen Stück des Dämpfungsmaterials mehrere parallele Aussparungen 22 ausgeschnitten werden. Dadurch ergeben sich parallel zueinander angeordnete und entlang des Umfangs des Rechtecks miteinander verbundene Streifen 20. Dieses Dämpfungsmaterial 12 kann somit ebenfalls als integrales Element gehandhabt werden.The damping material preferably has a thickness in the range between 0.05 mm and 0.3 mm, more preferably between 0.15 mm and 0.25 mm, and particularly preferably about 0.2 mm. The width of the damping material in the winding direction is preferably such that the damping layer 12 extends at least once around the circumference of the frame 4 forming the hollow profile, ie, having at least one winding. However, it is more preferred to dimension the width such that the damping material extends over at least two windings. For this purpose, the damping material preferably a width in the range between 30 mm and 150 mm, more preferably between 70 mm and 140 mm, and most preferably between 80 mm and 130 mm. The length L of the damping layer 12 in the direction of the frame extension is preferably in the range between 20 mm and 150 mm, more preferably between 40 mm and 110 mm.Das damping material may be formed in the form of a plurality of strips 20 according to the embodiment shown schematically in Figure 3. The strips 20 are preferably arranged parallel to each other and together form a damping layer 12, which are preferably in their dimensions in the range of the above-described continuous damping layer. As shown in FIG. 3, the strips 20 of the damping layer 12 are preferably formed by cutting out a plurality of parallel recesses 22 from an approximately rectangular piece of the damping material. This results in mutually parallel and along the circumference of the rectangle interconnected strip 20. This damping material 12 can thus also be handled as an integral element.

Die einzelnen Streifen 20 haben vorzugsweise eine Länge 1 im Bereich zwischen 3 mm und 10 mm, stärker bevorzugt zwischen 5 mm und 7 mm. Der erfindungsgemäße Effekt der verbesserten Dämpfung ist auch mit dieser streifenförmigen Ausbildung der Dämpfungslage 12 gewährleistet, da die einzelnen Streifen 20 ebenfalls die zwischen benachbarten Lagen 14, 16 auftretenden Schubspannungen abbauen. Die einzelnen Streifen 20 können senkrecht zur Erstreckung des Rahmens an der betreffenden Stelle vorgesehen sein. Es kann aber auch vorteilhaft sein, die Streifen 20 unter einem Winkel relativ zur Wickelrichtung vorzusehen, so daß sich im gewickelten Zustand benachbarte Streifen zumindest teilweise überlappen können. Geeignete Winkel zum Wickeln des Dämpfungsmaterials liegen vorzugsweise im Bereich zwischen 0° und 45°, vorzugsweise zwischen 5° und 15° zur Rahmenlängsrichtung. Auch bei dieser Anordnung werden Schubspannungen zwischen benachbarten Lagen 14, 16 des den Rahmen 4 bildenden Lagenmaterials wirkungsvoll abgebaut.The individual strips 20 preferably have a length 1 in the range between 3 mm and 10 mm, more preferably between 5 mm and 7 mm. The inventive effect of the improved damping is ensured even with this strip-shaped design of the damping layer 12, since the individual strips 20 also reduce the shear stresses occurring between adjacent layers 14, 16. The individual strips 20 may be provided perpendicular to the extension of the frame at the relevant point. But it may also be advantageous to provide the strips 20 at an angle relative to the winding direction, so that adjacent strips can at least partially overlap in the wound state. Suitable angles for winding the damping material are preferably in the range between 0 ° and 45 °, preferably between 5 ° and 15 ° to the frame longitudinal direction. In this arrangement as well, shear stresses between adjacent layers 14, 16 of the layer material forming the frame 4 are effectively reduced.

Der erfindungsgemäße Schläger 2 hat im wesentlichen den Vorteil, daß er trotz seiner integralen bzw. einstückigen Konstruktion hervorragende Dämpfungseigenschaften aufweist, wobei er gleichzeitig einfach herstellbar ist.The racket 2 according to the invention has essentially the advantage that it has excellent damping properties despite its integral or one-piece design, while being easy to produce at the same time.

Figur 4 ist eine Darstellung, aus der zu erkennen ist, wie die Position und Größe von Dämpfungslagen am Schlägerkopf die Verformung des Schlägers unter Last beeinflussen. Das Diagramm zeigt die Verformung in Millimetern des Schlägers an einer bestimmten Meßstelle. Die Meßstelle ist auf der x-Achse des Diagramms dargestellt, wobei die jeweilige Meßstelle als Abstand vom äußersten Kopfende des Schlägers definiert ist. Auf der y-Achse ist die Verformung in Millimetern dargestellt. Wie dem Diagramm zu entnehmen ist, wurden drei verschiedene Schläger untersucht, nämlich ein erster mit der Bezeichnung "175-R0-H0" (dunkelgraue Kennlinie), ein zweiter mit der Bezeichnung "175-R55-H0" (hellgraue Kennlinie) und ein dritter mit der Bezeichnung "175-R110-H0" (weiße Kennlinie). Die Bezeichnung "175" ist eine Bezeichnung des Schlägers. Die Bezeichnung "Rx" gibt Aufschluß über die Länge L der Dämpfungslage in Richtung der Rahmenerstreckung. Das heißt, "R0" betrifft einen Schläger ohne Dämpfungslage, "R55" betrifft einen Schläger mit einer Dämpfungslage einer Länge von 55 mm, und "R110" betrifft einen Schläger mit einer Dämpfungslage einer Länge von 110 mm. Die Dämpfungslagen sind jeweils bei etwa 5 Uhr bzw. 7 Uhr vorgesehen, also im Bereich zwischen 4 Uhr und 6 Uhr bzw. 6 Uhr und 8 Uhr.Figure 4 is an illustration showing how the position and size of cushioning layers on the clubhead affect the deformation of the racket under load. The diagram shows the deformation in millimeters of the racket at a specific measuring point. The measuring point is shown on the x-axis of the diagram, wherein the respective measuring point is defined as the distance from the extreme head end of the racket. On the y-axis the deformation is shown in millimeters. As can be seen from the diagram, three different clubs were tested, namely a first one with the designation "175-R0-H0" (dark gray curve), a second one with the designation "175-R55-H0" (light gray curve) and a third one with the designation "175-R110-H0" (white curve). The term "175" is a name of the racket. The term "Rx" provides information about the length L of the damping layer in the direction of the frame extension. That is, "R0" refers to a racket without a cushioning layer, "R55" refers to a racket having a cushioning layer having a length of 55 mm, and "R110" refers to a racket having a cushioning layer having a length of 110 mm. The damping positions are each provided at about 5 o'clock or 7 o'clock, ie in the range between 4 o'clock and 6 o'clock or 6 o'clock and 8 o'clock.

Aus dem Diagramm ist generell zu erkennen, daß die Verwendung von Dämpfungslagen in diesem Bereich des Schlägerkopfes den Schläger weicher macht, also eine höhere Verformung unter Last nach sich zieht. Dies ist anhand der hellgrauen bzw. insbesondere weißen Kennlinie im Vergleich zur dunkelgrauen Kennlinie (keine Dämpfungslage) ohne weiteres erkennbar. Darüber hinaus ist dem Diagramm zu entnehmen, daß sich alle drei getesteten Schlägervarianten im Halsbereich des Schlägers sowie einem zum Kopfende des Schlägers gerichteten Bereich (d.h. bei einem Abstand vom Kopfende von weniger als ca. 150 mm) relativ ähnlich verhalten. Im Bereich der Dämpfungslage, also etwa bei 250 bis 320 mm Abstand vom Kopfende ergeben sich erhebliche Unterschiede zwischen dem erfindungsgemäßen Schläger und einem Schläger ohne Dämpfungslage.From the diagram it can generally be seen that the use of damping layers in this region of the clubhead makes the club softer, thus resulting in a higher deformation under load. This is easily recognizable on the basis of the light gray or, in particular, white characteristic compared to the dark gray characteristic curve (no damping position). In addition, it can be seen from the graph that all three racket variants tested behave relatively similarly in the neck area of the racket and at a head-end of the racket area (i.e., at a head-end distance of less than about 150 mm). In the area of the damping position, ie at a distance of 250 to 320 mm from the head end, there are considerable differences between the racket according to the invention and a racket without a damping layer.

Der erfindungsgemäße Schläger ist somit gegenüber Schlägern ohne Dämpfungslage hinsichtlich seiner Handhabungseigenschaften deutlich überlegen. Ferner ist der erfindungsgemäße Schläger auch gegenüber Schlägern mit im Griffabschnitt vorgesehenen Dämpfungslagen hinsichtlich seiner Handhabbarkeit deutlich verbessert, da bei Schlägern mit Dämpfungslagen im Griffabschnitt ein relativ weicher Schläger im Bereich des Griffs vorliegt. Dies führt zwar unter Umständen zu einer effektiven Art der Dämpfung, geht jedoch gleichzeitig mit einem Verlust an Schlagkraft einher.The racket according to the invention is thus clearly superior to rackets without damping layer in terms of its handling properties. Furthermore, the racket according to the invention is also significantly improved with respect to racquets with provided in the grip portion damping layers in terms of its handling, since in rackets with damping layers in the handle portion is a relatively soft racket in the region of the handle. While this may result in an effective way of damping, it is also accompanied by a loss of clout.

Claims (21)

  1. A racket for ball games including a frame (4) having a racket head (6) and a handle portion (10) connected thereto via a heart region (8) and being formed of a hollow profile formed by winding a plurality of layers, wherein on the racket head (6) the frame (4) comprises a plurality of dampening layers (12) arranged in pairs essentially symmetrical with respect to the longitudinal axis of the racket (2) wrapped between the layers forming the hollow profile, wherein a dampening layer (12a) is provided in the area between four o'clock and six o'clock and a further dampening layer (12b) between six o'clock and eight o'clock on the racket head (6), wherein the longitudinal axis is defined by the six o'clock and twelve o'clock positions.
  2. The racket according to claim 1, wherein a dampening layer (12a) is provided at about five o'clock and a further dampening layer (12b) at about seven o'clock on the racket head (6).
  3. The racket according to claim 1 or 2, wherein a further dampening layer (12d) is provided in the area between one o'clock and three o'clock and symmetrically thereto a dampening layer (12c) between nine o'clock and eleven o'clock on the racket head (6).
  4. The racket according to any one of claims 1 to 3, wherein a further dampening layer (12d) is provided at about two o'clock and symmetrically thereto a dampening layer (12c) at about ten o'clock on the racket head (6).
  5. The racket according to any one of claims 1 to 4, wherein the dampening layer (12) is formed of a shock and/or vibration absorbing material.
  6. The racket according to any one of claims 1 to 5, wherein the material of the dampening layer (12) is synthetic rubber, in particular polyisoprene, styrenebutadiene rubber, polychloroprene or urethane rubber, or a mixture of natural rubber and synthetic rubber.
  7. The racket according to any one of claims 1 to 6, wherein the material of the dampening layers (12) has a thickness ranging between 0.05 mm and 0.3 mm, preferably between 0.15 mm and 0.25 mm, more preferably a thickness of about 0.2 mm.
  8. The racket according to any one of claims 1 to 7, wherein the width of the material of the dampening layers (12) is dimensioned such that the dampening layers extend over at least one, preferably two or more winding(s) in the hollow profile.
  9. The racket according to any one of claims 1 to 8, wherein the material forming the dampening layers (12) has a width ranging between 30 mm and 150 mm, preferably between 70 mm and 140 mm, more preferably between 80 mm and 130 mm.
  10. The racket according to any one of claims 1 to 9, wherein the dampening layers (12) have a length (L) ranging between 20 mm and 150 mm, preferably between 40 mm and 110 mm.
  11. The racket according to any one of claims 1 to 10, wherein the dampening layers (12) are provided in the form of a plurality of strips (20).
  12. The racket according to claim 11, wherein the strips (20) extend essentially parallel with respect to each other.
  13. The racket according to claim 11 or 12, wherein each strip (20) has a length (1) ranging between 3 mm and 10 mm, preferably between 5 mm and 7 mm.
  14. The racket according to any one of claims 1 to 13, wherein the dampening material has a Shore A hardness greater than 30, preferably between 65 and 75.
  15. The racket according to any one of claims 1 to 14, wherein the dampening layers are provided under an angle ranging between 0° and 45°, preferably between 5° and 15° with respect to the longitudinal direction of the frame.
  16. The racket according to any one of claims 1 to 15, wherein at least one dampening layer is provided in the heart region of the racket.
  17. A process for producing a racket (2) according to any one of claims 1 to 16, comprising the following steps:
    (a) providing a windable layer material;
    (b) placing a web-shaped dampening material onto the layer material;
    (c) winding the at least partially overlapping layer material and dampening material to form a tube; and
    (d) forming a frame (4) consisting of a frame profile made of the tube, wherein the frame comprises a racket head (6) and a handle portion (10) being connected therewith via a heart region (8).
  18. The process according to claim 17, wherein a plurality of strips (20) of the dampening material together form a dampening layer (12).
  19. The process according to claim 18, wherein the strips (20) are arranged so as to essentially extend parallel with respect to each other.
  20. The process according to any one of claims 17 to 19, wherein the dampening material is wound under an angle ranging between 0° and 45°, preferably between 5° and 15° with respect to the longitudinal direction of the frame.
  21. The process according to any one of claims 17 to 20, wherein the frame (4) is molded in a molding press under the influence of pressure and temperature.
EP05004225A 2004-03-03 2005-02-25 Racquet for ball games and manufacturing processes Active EP1570883B1 (en)

Applications Claiming Priority (2)

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DE102004010349A DE102004010349B4 (en) 2004-03-03 2004-03-03 Rackets for ball games and manufacturing processes
DE102004010349 2004-03-03

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EP1570883A1 EP1570883A1 (en) 2005-09-07
EP1570883B1 true EP1570883B1 (en) 2007-07-11

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US (1) US7077767B2 (en)
EP (1) EP1570883B1 (en)
CN (1) CN100488586C (en)
AT (1) ATE366608T1 (en)
DE (2) DE102004010349B4 (en)
TW (1) TWI337883B (en)

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US8105184B2 (en) 2007-10-24 2012-01-31 Head Technology Gmbh System and method of using shear thickening materials in sports products
EP3922327A1 (en) 2020-06-11 2021-12-15 Sumitomo Rubber Industries, Ltd. Racket

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DE10308532B3 (en) * 2003-02-27 2004-10-21 Head Technology Ges.M.B.H. Rackets for ball games
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US8342989B2 (en) 2008-11-14 2013-01-01 Head Technology Gmbh Sporting goods with graphene material
CN103272374B (en) * 2013-06-07 2015-10-07 南京胜利体育用品实业有限公司 Racket manufacture method

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US8105184B2 (en) 2007-10-24 2012-01-31 Head Technology Gmbh System and method of using shear thickening materials in sports products
EP3922327A1 (en) 2020-06-11 2021-12-15 Sumitomo Rubber Industries, Ltd. Racket

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Publication number Publication date
DE102004010349A1 (en) 2005-09-29
CN100488586C (en) 2009-05-20
EP1570883A1 (en) 2005-09-07
TW200534897A (en) 2005-11-01
ATE366608T1 (en) 2007-08-15
US20050197218A1 (en) 2005-09-08
US7077767B2 (en) 2006-07-18
DE102004010349B4 (en) 2006-03-09
TWI337883B (en) 2011-03-01
DE502005000990D1 (en) 2007-08-23
CN1663641A (en) 2005-09-07

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