EP0553769B1 - Racket, particularly tennis racket - Google Patents

Racket, particularly tennis racket Download PDF

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Publication number
EP0553769B1
EP0553769B1 EP93101142A EP93101142A EP0553769B1 EP 0553769 B1 EP0553769 B1 EP 0553769B1 EP 93101142 A EP93101142 A EP 93101142A EP 93101142 A EP93101142 A EP 93101142A EP 0553769 B1 EP0553769 B1 EP 0553769B1
Authority
EP
European Patent Office
Prior art keywords
frame
section
racket
cross
string
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
EP93101142A
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German (de)
French (fr)
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EP0553769A1 (en
Inventor
Volker Klose
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.)
Franz Volkl & Co Ski und Tennis Sportartikelfabrik KG GmbH
Original Assignee
Franz Volkl & Co Ski und Tennis Sportartikelfabrik KG GmbH
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Filing date
Publication date
Priority claimed from DE4203682A external-priority patent/DE4203682C2/en
Priority claimed from DE4229898A external-priority patent/DE4229898A1/en
Application filed by Franz Volkl & Co Ski und Tennis Sportartikelfabrik KG GmbH filed Critical Franz Volkl & Co Ski und Tennis Sportartikelfabrik KG GmbH
Publication of EP0553769A1 publication Critical patent/EP0553769A1/en
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Publication of EP0553769B1 publication Critical patent/EP0553769B1/en
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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
    • A63B49/00—Stringed rackets, e.g. for tennis
    • A63B49/02—Frames
    • A63B49/028—Means for achieving greater mobility of the string bed
    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B49/00—Stringed rackets, e.g. for tennis
    • A63B49/02—Frames
    • A63B49/022—String guides on frames, e.g. grommets
    • 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 invention relates to a ball game racket according to the preamble of claim 1.
  • Ball game rackets including tennis rackets
  • Ball game rackets are known in a wide variety of designs.
  • the sleeves include a gentle covering as well as a certain damping effect.
  • Fixing the string lengths on the outside of the frame results in a defined position of the covering relative to the frame and also to the racket grip, as is necessary for the stability and playability of the racket.
  • the increased flexibility on the inside of the frame improves the playing comfort of the racket. This improvement leads to improved damping and to the avoidance of vibrations in the covering, which adversely affect the playing comfort.
  • the mobility of the tennis racket increases the effective playing area so that the properties or almost the properties of a big head racket can be achieved with a racket of normal size.
  • a ball game racket (US-A-1 611 232) which consists of a hollow metal frame which is closed to the outside and forms a racket head.
  • For the string attachment sleeves are provided on the racket head, through which the string length is passed.
  • the sleeves In order on the one hand to fix the string lengths on the inside of the racket head as optimally as possible and on the other hand to relieve the string lengths in the area of the respective clamping, the sleeves have openings with a to the outside of the racket head, i. H. cross-section enlarging towards the outside of the frame.
  • the cross section of the opening of each sleeve corresponds to the outside cross section of the side used for racket covering.
  • the object of the invention is to show a ball game racket, in particular tennis racket, which, while maintaining the aforementioned advantages and the possibility of inexpensive production, also corresponds to the quality requirements that are placed on a tennis racket.
  • a ball game racket in particular tennis racket, is designed in accordance with the characterizing part of patent claim 1.
  • the mobility for the string lengths on the inside of the frame in the axial direction perpendicular to the plane of the covering is given by the fact that the respective sleeve has a sleeve opening whose dimension or cross section on the inside of the frame is greater than the cross section of the respective string length.
  • On the outside of the frame is fixed against the string length in question in such a way that there is no possibility of movement of the string length relative to the frame, at most a possibility of movement that is significantly less than the possibility of movement on the inside of the frame.
  • the sleeve is seated in openings or bores which are provided on the frame part on the outside of the frame or on the inside of the frame.
  • the sleeve closes the frame part forming the club head at these openings, so that penetration of moisture, dirt or other foreign particles into the cavity is not possible.
  • the respective sleeve is preferably designed such that the cross section of the sleeve opening widens in a trumpet or cone-like manner toward the inside of the frame.
  • the sleeve opening has an oval cross-section in such a way that the possibility of movement is only possible in a defined axial direction, namely in the axial direction perpendicular to the clothing plane.
  • the properties of the tennis racket or the covering can be optimally adjusted by appropriately distributing such string attachments that allow the string lengths to move on the inside of the frame and such string attachments that only allow limited mobility or no mobility.
  • the tennis racket shown in the figures consists essentially of a frame 3 forming a racket head 1 and a racket handle 2, and of the covering 4 provided on the racket head 1.
  • the frame 3 is produced both in the area of the club head 1 or the frame part 3 ′ forming this club head and in the area of the club handle 2 as a hollow body or hollow frame which is closed to the outside, namely from a fiber-reinforced plastic material.
  • the covering 4 has string lengths 4 ′ and 4 ′′ crossing each other in a known manner, of which the string lengths 4 ′ run parallel to the longitudinal axis of the racket head 1 and the string lengths 4 ′′ run perpendicularly thereto.
  • the covering 4 defines a stringing plane BE with these string lengths 4 'and 4' 'and is held on the frame part 3' in that the string lengths 4 'and 4' 'forming the covering 4 are each in a region through the frame part 3' of the the middle of the racket head 1 or the covering facing the inside of the frame to the outside of the frame and in a further region are in turn led through the frame part 3 'from the outside of the frame to the inside of the frame.
  • a sleeve 9 enclosing the string lengths is arranged in the frame part 3 '.
  • the frame part 3 'or the wall of this frame part has a bore 10 on the outside of the frame and a bore 11 on the inside of the frame.
  • the respective sleeve 9 made of an elastic plastic material is inserted in such a way that it rests with a web-like widened section 9 'against the outside of the frame and extends with a sleeve-like section 9''through the holes 10 and 11, which are arranged coaxially with one another are and lie with their axes in the clothing plane BE.
  • the sleeve-like section 9 ′′ is on its outer or peripheral surface with respect to cross-sectional shape and size to the cross-sectional shape and size of the Bores 10 and 11 adapted so that the sleeve 9 fits with the section 9 '' in these bores 10 and 11.
  • the frame part 3 'in the area of the associated bores 10 and 11 is thus completely closed to the outside and also protected against the ingress of moisture, dirt or other foreign particles.
  • the two bores 10 and 11 have the same cross section, which is larger than the cross section of the covering 4 or the string lengths 4 ′ and 4 ′′ forming this covering.
  • the section 9 ' is designed like a strip and a plurality of sections 9''are provided on this section, each section 9''being arranged in the bores 10 and 11 in the manner described above.
  • Each sleeve-shaped section 9 ′′ has an opening 12 through which the corresponding string length 4 ′ or 4 ′′ is passed for the side fastening, the part length of the covering 4 running from one passage point to the next passage point on the outside of the frame part 3 ′ rests on the section 9 '.
  • the opening 12 of the sleeve 9 has a cross section which widens towards the end of the section 9 '' facing away from the section 9 ', ie from the outside of the frame to the inside of the frame in the manner of a trumpet or cone, in such a way that the respective one on the outside of the frame String length is essentially enclosed by the sleeve 9, the covering 4 is thus fixed in the area of the bore 10 such that there is essentially no movement of the covering 4, neither in an axial direction A perpendicular to the covering plane BE, nor in an axial direction parallel to the clothing plane BE.
  • the cross-section of the opening 12 increases in the cross-sectional axis perpendicular to the covering plane BE such that it is larger on the inside of the frame than the cross-section of the string lengths. This is on the inside of the frame it is possible to deflect the covering 4 in the axial direction A by moving the covering 4 freely in the opening 12.
  • the opening 12 has an oval cross section in the form that a free movement of the covering 4 is essentially only possible in the axial direction A, while in an axial direction that is perpendicular to the axial direction A and also perpendicular to the longitudinal extent of the respective string length, thereby it is at least largely prevented that the string length 4 'or 4' 'comes into contact with the sleeve 9.
  • the desired course of the covering 4 in which the side lengths 4 'and 4' 'extend in a straight line and face each other at a predetermined angle, i.e. Cut at an angle of 90 °, even after using the racket for a long time.
  • the openings 11 and 10 have an oval cross section, the longer cross-sectional axis of which extends in the axial direction A.
  • the External cross-section of the sleeve 9 corresponds to the cross-section of the openings 10 and 11.
  • This embodiment has the advantage that in particular on the inside of the frame between two adjacent openings 11 there is as wide a region as possible, in which the wall of the frame part 3 'is not interrupted.
  • a large part of the fibers 14 of the fiber-reinforced plastic material, which (fibers) on the outside of the frame and on the inside of the frame intersect at an angle to the covering plane BE, are not interrupted by the openings 10 and 11.
  • Other fibers 14, which are interrupted by these openings overlap with a sufficient length so that overall a high stability is achieved on the more critical inside of the frame, on which the distance between the openings 11 is smaller than the distance between the openings 10 on the outside.
  • a damping material 13 is introduced into the opening 12 of the sleeve 9, which surrounds the respective string length 4 'or 4' 'in the region of both bores 10 and 11, which in the embodiment shown the each opening 12 completely fills in its part not occupied by the string length 4 'or 4' '.
  • the material 13 is a permanently elastic material which absorbs kinetic energy when deformed, i.e. converts to heat and has a dampening effect.
  • the material 13 is introduced into the openings 12 after the sleeves 9 have been inserted and after the racket has been strung.
  • the tight closure, in particular of the bores 10 and 11 through the sleeves 9, ensures that the material 13 only reaches the openings 12 and not the interior of the hollow frame 3 or the hollow frame part 3 '.
  • the damping material 13, in conjunction with the possibility of movement of the covering 4 in the axial direction A, results in a substantial improvement in the playing comfort, in particular also in that even with a very rigid frame 3 there is a substantially improved damping. Furthermore, vibrations of the covering 4 which impair play comfort are avoided.
  • the sleeve 9 with the end lying away from the section 9 ' projects slightly beyond the inside of the frame part 3', the opening 12 completely, i.e. is also filled with the material 13, in particular in the region of the bore 11.
  • FIG. 5 shows, in a representation similar to FIG. 3, a further embodiment in which the sleeves 7 each have a circular cylindrical outer cross section and accordingly the openings 10 and 11 in the frame part 3 'are circular cylindrical.
  • the bore 12 of each sleeve again has the cross-section described above, which widens in the cross-sectional axis perpendicular to the clothing plane BE in the manner of a trumpet or cone, so that the covering 4 can be avoided in the axial direction A, namely through free movement of the stringing in the bore 12, while a movement in the stringing plane BE and perpendicular to the respective string length 4 'or 4' 'is not or at least essentially not possible.
  • the invention has been described above using exemplary embodiments. It goes without saying that changes and modifications are possible without thereby departing from the inventive concept on which the invention is based.
  • the opening 10 in the embodiments shown in FIGS. 2 and 4 it is possible to design the opening 10 in the embodiments shown in FIGS. 2 and 4 so that it has a smaller diameter than the opening 11.
  • the sleeve-like section 9 ′′ is provided at the transition area to the section 9 ′ with a circumferential groove 15 into which the edge of the opening 10 engages.
  • the sleeve 9 are preferably part of a sleeve strip.
  • the embodiment according to FIG. 5 has the advantage that the circular cylindrical openings 10 and 11 can be easily produced, but at the same time the covering 4 can only evade in the axial direction A.

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  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Physical Education & Sports Medicine (AREA)
  • Golf Clubs (AREA)
  • Laminated Bodies (AREA)
  • Pinball Game Machines (AREA)
  • Character Spaces And Line Spaces In Printers (AREA)

Abstract

The invention relates to a racquet, in particular a tennis racquet, having a hollow frame which is closed towards the outside. The mount (9) for the strings is designed such that, for the purpose of improving the playing properties, the lengths (4) of string are able to move in an axial direction (A), perpendicularly with respect to the plane of the strings (B), at their point of fastening. <IMAGE>

Description

Die Erfindung bezieht sich auf einen Ballspielschläger gemäß Oberbegriff Patentanspruch 1.The invention relates to a ball game racket according to the preamble of claim 1.

Ballspielschläger, auch Tennisschläger sind in den unterschiedlichsten Ausführungen bekannt. Insbesondere ist auch bekannt, für die die Bespannung bildenden Saitenlängen eine Saitenbefestigung am Schlägerkopf vorzusehen, bei der die Saitenlängen unter Verwendung von Hülsen aus elastischem Material durch das den Schlägerkopf bildende Rahmenteil hindurchgeführt sind. Durch die Hülsen ist u.a. eine schonende Bespannung sowie auch eine gewisse Dämpfungswirkung erreicht.Ball game rackets, including tennis rackets, are known in a wide variety of designs. In particular, it is also known to provide a string attachment to the racket head for the string lengths forming the stringing, in which the string lengths are guided through the frame part forming the racket head using sleeves made of elastic material. The sleeves include a gentle covering as well as a certain damping effect.

Bekannt ist (US-PS 5 014 987), bei Tennisschlägern mit einem hohlen Rahmen die Saitenbefestigungen so auszuführen, daß an jeder Saitenbefestigung die jeweilige Saitenlänge an der Rahmenaußenseite so fixiert ist, daß dort ein Ausweichen der Saitenlänge gegenüber dem Rahmen praktisch nicht möglich ist, während an der Rahmeninnenseite eine erhöhte Beweglichkeit der jeweiligen Saitenlänge sowohl in einer Achsrichtung der Bespannungsebene, als auch in einer Achsrichtung senkrecht zu der Bespannungsebene gegeben ist. Dies wird dadurch erreicht, daß die Saitenlängen an der Rahmeninnenseite durch Öffnungen geführt sind, deren Querschnitt wesentlich größer ist als der Querschnitt der Saitenlängen. Durch die Fixierung der Saitenlängen an der Rahmenaußenseite ergibt sich eine definierte Lage der Bespannung zum Rahmen und auch zum Schlägergriff, wie dies für die Stabilität und Spielbarkeit des Schlägers erforderlich ist. Durch die erhöhte Beweglichkeit an der Rahmeninnenseite wird der Spielkomfort des Schlägers verbessert. Diese Verbesserung führt zu einer verbesserten Dämpfung sowie zur Vermeidung von Schwingungen in der Bespannung, die den Spielkomfort negativ beeinträchtigen. Vor allem aber wird durch die Beweglichkeit die effektive Spielfläche des Tennisschlägers wesentlich vergrößert, so daß mit einem Schläger normaler Größe die Eigenschaften oder nahezu die Eigenschaften eines Großkopfschlägers erreichbar sind.It is known (US Pat. No. 5,014,987) to carry out the string attachments in tennis rackets with a hollow frame in such a way that the respective string length is fixed on the outside of the frame on each string attachment in such a way that it is practically impossible for the string length to deviate from the frame there, while on the inside of the frame there is increased mobility of the respective string length both in an axial direction of the stringing plane and in an axial direction perpendicular to the stringing plane. This is achieved in that the string lengths are passed through openings on the inside of the frame, the cross section of which is substantially larger than the cross section of the string lengths. Fixing the string lengths on the outside of the frame results in a defined position of the covering relative to the frame and also to the racket grip, as is necessary for the stability and playability of the racket. The increased flexibility on the inside of the frame improves the playing comfort of the racket. This improvement leads to improved damping and to the avoidance of vibrations in the covering, which adversely affect the playing comfort. Above all, the mobility of the tennis racket increases the effective playing area so that the properties or almost the properties of a big head racket can be achieved with a racket of normal size.

Bekannt ist auch ein Ballspielschläger (US-A-1 611 232), der aus einem hohlen, nach außen hin geschlossenen und einen Schlägerkopf bildenden Metallrahmen besteht. Für die Saitenbefestigung sind wiederum am Schlägerkopf Hülsen vorgesehen, durch die die Saitenlänge hindurchgeführt sind. Um einerseits die Saitenlängen an der Innenseite des Schlägerkopfes möglichst optimal zu fixieren und andererseits die Saitenlängen im Bereich der jeweiligen Einspannung zu entlasten besitzen die Hülsen Öffnungen mit einem sich zur Außenseite des Schlägerkopfes, d. h. zur Rahmenaußenseite hin vergrößenden Querschnitt. An der Rahmeninnenseite entspricht der Querschnitt der Öffnung jeder Hülse den Außenquerschnitt der für die Schlägerbespannung verwendeten Seite.Also known is a ball game racket (US-A-1 611 232) which consists of a hollow metal frame which is closed to the outside and forms a racket head. For the string attachment sleeves are provided on the racket head, through which the string length is passed. In order on the one hand to fix the string lengths on the inside of the racket head as optimally as possible and on the other hand to relieve the string lengths in the area of the respective clamping, the sleeves have openings with a to the outside of the racket head, i. H. cross-section enlarging towards the outside of the frame. On the inside of the frame, the cross section of the opening of each sleeve corresponds to the outside cross section of the side used for racket covering.

Aufgabe der Erfindung ist es, einen Ballspielschläger, insbesondere Tennisschläger aufzuzeigen, der unter Beibehaltung der vorgenannten Vorteile und der Möglichkeit einer preiswerten Fertigung auch den qualitätiven Anforderungen entspricht, die an einen Tennisschläger gestellt werden.The object of the invention is to show a ball game racket, in particular tennis racket, which, while maintaining the aforementioned advantages and the possibility of inexpensive production, also corresponds to the quality requirements that are placed on a tennis racket.

Zur Lösung dieser Aufgabe ist ein Ballspielschläger, insbesondere Tennisschläger, entsprechend dem kennzeichnenden Teil des Patentanspruches 1 ausgebildet.To solve this problem, a ball game racket, in particular tennis racket, is designed in accordance with the characterizing part of patent claim 1.

Bei dem erfindungsgemäßen Ballspielschläger ist die Beweglichkeit für die Saitenlängen an der Rahmeninnenseite in der Achsrichtung senkrecht zur Ebene der Bespannung dadurch gegeben, daß die jeweilige Hülse eine Hülsenöffnung besitzt, deren Abmessung bzw. Querschnitt an der Rahmeninnenseite größer ist als der Querschnitt der jeweiligen Saitenlänge. An der Rahmenaußenseite ist gegen die betreffende Saitenlänge derart fixiert, daß dort keine Bewegungsmöglichkeit der Saitenlänge relativ zum Rahmen besteht, allenfalls eine Bewegungsmöglichkeit, die wesentlich kleiner ist als die Bewegungsmöglichkeit an der Rahmeninnenseite.In the ball game racket according to the invention, the mobility for the string lengths on the inside of the frame in the axial direction perpendicular to the plane of the covering is given by the fact that the respective sleeve has a sleeve opening whose dimension or cross section on the inside of the frame is greater than the cross section of the respective string length. On the outside of the frame is fixed against the string length in question in such a way that there is no possibility of movement of the string length relative to the frame, at most a possibility of movement that is significantly less than the possibility of movement on the inside of the frame.

Die Hülse sitzt hierbei in Öffnungen bzw. Bohrungen, die am Rahmenteil an der Rahmenaußenseite bzw. an der Rahmeninnenseite vorgesehen sind. Die Hülse verschließt das den Schlägerkopf bildende Rahmenteil an diesen Öffnungen, so daß ein Eindringen von Feuchtigkeit, Schmutz oder anderen Fremdpartikeln in den Hohlraum nicht möglich ist.The sleeve is seated in openings or bores which are provided on the frame part on the outside of the frame or on the inside of the frame. The sleeve closes the frame part forming the club head at these openings, so that penetration of moisture, dirt or other foreign particles into the cavity is not possible.

Bevorzugt ist die jeweilige Hülse so ausgebildet, daß sich der Querschnitt der Hülsenöffnung zur Rahmeninnenseite hin trompeten- oder kegelartig erweitert.The respective sleeve is preferably designed such that the cross section of the sleeve opening widens in a trumpet or cone-like manner toward the inside of the frame.

Bei einer bevorzugten Ausführungsform besitzt die Hülsenöffnung einen ovalen Querschnitt und zwar derart, daß die Bewegungsmöglichkeit nur in einer Achsrichtung definiert möglich ist, nämlich in der Achsrichtung senkrecht zur Bespannungsebene.In a preferred embodiment, the sleeve opening has an oval cross-section in such a way that the possibility of movement is only possible in a defined axial direction, namely in the axial direction perpendicular to the clothing plane.

Durch entsprechende Verteilung solcher Saitenbefestigungen, die eine Beweglichkeit der Saitenlängen an der Rahmeninnenseite zulassen, und solcher Saitenbefestigungen, die nur eine beschränkte Beweglichkeit oder keine Beweglichkeit zulassen, können die Eigenschaften des Tennisschlägers bzw. der Bespannung optimal eingestellt werden.The properties of the tennis racket or the covering can be optimally adjusted by appropriately distributing such string attachments that allow the string lengths to move on the inside of the frame and such string attachments that only allow limited mobility or no mobility.

Bei der Erfindung besteht weiterhin die Möglichkeit, daß zumindest bei einem Teil der Hülsen die Hülsenöffnungen in ihrem von den jeweiligen Saitenlängen nicht eingenommenen Bereich zumindest teilweise von einem dauerelastischen, dämpfenden Material ausgefüllt ist.In the case of the invention, there is furthermore the possibility that at least in some of the sleeves the sleeve openings are at least partially filled with a permanently elastic, damping material in their area not occupied by the respective string lengths.

Weiterbildungen der Erfindung sind Gegenstand der Unteransprüche.Developments of the invention are the subject of the dependent claims.

Die Erfindung wird im Folgenden anhand der Figuren an einem Ausführungsbeispiel näher erläutert. Es zeigen:

Fig. 1
einen Ballspielschläger in Form eines Tennisschlägers in Draufsicht;
Fig. 2
in vergrößerter Darstellung einen Schnitt entsprechend der Linie I-I der Fig. 1;
Fig. 3
eine Draufsicht auf die Rahmeninnenseite bei ener Blickrichtung entsprechend dem Pfeil B der Fig. 2;
Fig. 4
eine Darstellung ähnlich Fig. 2 bei einer abgewandelten Ausführungsform;
Fig. 5
eine ähnliche Darstellung wie Fig. 3 von einer weiteren Ausführungsform der Erfindung.
The invention is explained in more detail below with reference to the figures using an exemplary embodiment. Show it:
Fig. 1
a ball game racket in the form of a tennis racket in plan view;
Fig. 2
in an enlarged view a section along the line II of Fig. 1;
Fig. 3
a plan view of the inside of the frame with ene viewing direction according to arrow B of FIG. 2;
Fig. 4
a representation similar to Figure 2 in a modified embodiment.
Fig. 5
a representation similar to FIG. 3 of a further embodiment of the invention.

Der in den Figuren dargestellte Tennisschläger besteht im wesentlichen aus einem einen Schlägerkopf 1 und einen Schlägergriff 2 bildenden Rahmen 3 sowie aus der am Schlägerkopf 1 vorgesehenen Bespannung 4.The tennis racket shown in the figures consists essentially of a frame 3 forming a racket head 1 and a racket handle 2, and of the covering 4 provided on the racket head 1.

Der Rahmen 3 ist sowohl im Bereich des Schlägerkopfes 1 bzw. des diesen Schlägerkopf bildenden Rahmenteils 3', als auch im Bereich des Schlägergriffes 2 als nach außen hin geschlossener Hohlkörper bzw. Hohlrahmen hergestellt, und zwar aus einem faserverstärkten Kunststoffmaterial.The frame 3 is produced both in the area of the club head 1 or the frame part 3 ′ forming this club head and in the area of the club handle 2 as a hollow body or hollow frame which is closed to the outside, namely from a fiber-reinforced plastic material.

Die Bespannung 4 weist in bekannter Weise sich kreuzende Saitenlängen 4' und 4'' auf, von denen die Saitenlängen 4' parallel zur Längsachse des Schlägerkopfes 1 und die Saitenlängen 4'' senkrecht hierzu verlaufen. Die Bespannung 4 definiert mit diesen Saitenlängen 4' und 4'' eine Bespannungsebene BE und ist an dem Rahmenteil 3' dadurch gehalten, daß die die Bespannung 4 bildenden Saitenlängen 4' und 4'' jeweils an einem Bereich durch das Rahmenteil 3' von der der Mitte des Schlägerkopfes 1 bzw. der Bespannung zugewandten Rahmeninnenseite zur Rahmenaußenseite und an einem weiteren Bereich wiederum durch das Rahmenteil 3' hindurch von der Rahmenaußenseite an die Rahmeninnenseite geführt sind. An jeder dieser Durchtrittsstellen ist im Rahmenteil 3' eine die Saitenlängen umschließende Hülse 9 angeordnet.The covering 4 has string lengths 4 ′ and 4 ″ crossing each other in a known manner, of which the string lengths 4 ′ run parallel to the longitudinal axis of the racket head 1 and the string lengths 4 ″ run perpendicularly thereto. The covering 4 defines a stringing plane BE with these string lengths 4 'and 4' 'and is held on the frame part 3' in that the string lengths 4 'and 4' 'forming the covering 4 are each in a region through the frame part 3' of the the middle of the racket head 1 or the covering facing the inside of the frame to the outside of the frame and in a further region are in turn led through the frame part 3 'from the outside of the frame to the inside of the frame. At each of these passages, a sleeve 9 enclosing the string lengths is arranged in the frame part 3 '.

Das Rahmenteil 3' bzw. die Wandung dieses Rahmenteils weist an der Rahmenaußenseite eine Bohrung 10 und an der Rahmeninnenseite eine Bohrung 11 auf. In diesen Bohrungen ist die jeweilige, aus einem elastischen Kunststoffmaterial hergestellte Hülse 9 derart eingesetzt, daß sie mit einem stegartig verbreiterten Abschnitt 9' gegen die Rahmenaußenseite anliegt und mit einem hülsenartigen Abschnitt 9'' durch die Bohrungen 10 und 11 hindurchreicht, die achsgleich miteinander angeordnet sind und mit ihren Achsen in der Bespannungsebene BE liegen. Der hülsenartige Abschnitt 9'' ist an seiner Außen- bzw. Umfangsfläche hinsichtlich Querschnittsform und Größe derart an die Querschnittsform und Größe der Bohrungen 10 und 11 angepaßt, daß die Hülse 9 mit dem Abschnitt 9'' passend in diesen Bohrungen 10 und 11 sitzt. Durch die jeweilige Hülse 9 ist somit das Rahmenteil 3' im Bereich der zugehörigen Bohrungen 10 und 11 nach außen hin völlig verschlossen und auch gegen Eindringen von Feuchtigkeit, Schmutz oder anderen Fremdpartikeln geschützt.The frame part 3 'or the wall of this frame part has a bore 10 on the outside of the frame and a bore 11 on the inside of the frame. In these holes, the respective sleeve 9 made of an elastic plastic material is inserted in such a way that it rests with a web-like widened section 9 'against the outside of the frame and extends with a sleeve-like section 9''through the holes 10 and 11, which are arranged coaxially with one another are and lie with their axes in the clothing plane BE. The sleeve-like section 9 ″ is on its outer or peripheral surface with respect to cross-sectional shape and size to the cross-sectional shape and size of the Bores 10 and 11 adapted so that the sleeve 9 fits with the section 9 '' in these bores 10 and 11. Through the respective sleeve 9, the frame part 3 'in the area of the associated bores 10 and 11 is thus completely closed to the outside and also protected against the ingress of moisture, dirt or other foreign particles.

Die beiden Bohrungen 10 und 11 besitzen bei der dargestellten Ausführungsform den gleichen Querschnitt, der größer ist als der Querschnitt der Bespannung 4 bzw. der diese Bespannung bildenden Saitenlängen 4' bzw. 4''.In the embodiment shown, the two bores 10 and 11 have the same cross section, which is larger than the cross section of the covering 4 or the string lengths 4 ′ and 4 ″ forming this covering.

Schon der einfacheren Montage wegen ist der Abschnitt 9' leistenartig ausgebildet und an diesem Abschnitt ist eine Vielzahl von Abschnitte 9'' vorgesehen, wobei jeder Abschnitt 9'' in der vorbeschriebenen Weise in den Bohrungen 10 und 11 angeordnet ist. Jeder hülsenförmige Abschnitt 9'' besitzt eine Öffnung 12, durch die für die Seitenbefestigung die entsprechende Saitenlänge 4' bzw. 4'' hindurchgeführt ist, wobei die an der Außenseite des Rahmenteils 3' von einer Durchtrittsstelle an die nächste Durchtrittsstelle verlaufende Teillänge der Bespannung 4 auf dem Abschnitt 9' aufliegt. Die Öffnung 12 der Hülse 9 besitzt einen Querschnitt, der sich zu dem den Abschnitt 9' abgewandten Ende des Abschnittes 9'', d.h. von der Rahmenaußenseite zur Rahmeninnenseite hin trompeten- bzw. kegelartig verbreitert, und zwar derart, daß an der Rahmenaußenseite die jeweilige Saitenlänge im wesentlichen passend von der Hülse 9 umschlossen ist, die Bespannung 4 im Bereich der Bohrung 10 also derart fixiert ist, daß dort im wesentlichen keine Bewegung der Bespannung 4 möglich ist, und zwar weder in einer Achsrichtung A senkrecht zur Bespannungsebene BE, noch in einer Achsrichtung parallel zur Bespannungsebene BE. Ausgehend von der von der Bohrung 10 aufgenommenen Teillänge des Abschnittes 9'' nimmt der Querschnitt der Öffnung 12 in der Querschnittsachse senkrecht zur Bespannungsebene BE derart zu, daß er an der Rahmeninnenseite größer ist als der Querschnitt der Saitenlängen. Hierdurch ist an der Rahmeninnenseite ein Ausweichen der Bespannung 4 in der Achsrichtung A möglich, und zwar durch freies Bewegen der Bespannung 4 in der Öffnung 12.Already because of the simpler assembly, the section 9 'is designed like a strip and a plurality of sections 9''are provided on this section, each section 9''being arranged in the bores 10 and 11 in the manner described above. Each sleeve-shaped section 9 ″ has an opening 12 through which the corresponding string length 4 ′ or 4 ″ is passed for the side fastening, the part length of the covering 4 running from one passage point to the next passage point on the outside of the frame part 3 ′ rests on the section 9 '. The opening 12 of the sleeve 9 has a cross section which widens towards the end of the section 9 '' facing away from the section 9 ', ie from the outside of the frame to the inside of the frame in the manner of a trumpet or cone, in such a way that the respective one on the outside of the frame String length is essentially enclosed by the sleeve 9, the covering 4 is thus fixed in the area of the bore 10 such that there is essentially no movement of the covering 4, neither in an axial direction A perpendicular to the covering plane BE, nor in an axial direction parallel to the clothing plane BE. Starting from the partial length of section 9 ″ received by the bore 10, the cross-section of the opening 12 increases in the cross-sectional axis perpendicular to the covering plane BE such that it is larger on the inside of the frame than the cross-section of the string lengths. This is on the inside of the frame it is possible to deflect the covering 4 in the axial direction A by moving the covering 4 freely in the opening 12.

Die Öffnung 12 hat einen ovalen Querschnitt in der Form, daß eine freie Bewegung der Bespannung 4 im wesentlichen nur in der Achsrichtung A möglich ist, während in einer Achsrichtung, die senkrecht zur Achsrichtung A und die auch senkrecht zur Längserstreckung der jeweiligen Saitenlänge verläuft, dadurch zumindest weitestgehend verhindert wird, daß es zu einer Berührung der Saitenlänge 4' bzw. 4'' mit der Hülse 9 kommt.The opening 12 has an oval cross section in the form that a free movement of the covering 4 is essentially only possible in the axial direction A, while in an axial direction that is perpendicular to the axial direction A and also perpendicular to the longitudinal extent of the respective string length, thereby it is at least largely prevented that the string length 4 'or 4' 'comes into contact with the sleeve 9.

Durch die Bewegungsmöglichkeit der Bespannung 4 in Richtung der Achse A an der Rahmeninnenseite 4 wird u.a. eine Vergrößerung der effektiven Spielfläche erreicht, und zwar derart, daß der Tennisschläger bei normaler Größe des Schlägerkopfes 1 die Eigenschaften oder nahezu die Eigenschaften eines Großkopfschlägers besitzt. Durch die Ausbildung der Öffnung 12 mit einem ovalen Querschnitt, dessen größere Querschnittsachse in der Achsrichtung A liegt, wird auch sichergestellt, daß ein Ausweichen der jeweiligen Saitenlänge 4' in einer senkrecht zur Zeichenebene der Fig. 2 verlaufenden Achsrichtung nicht möglich ist, so daß u.a. der gewünschte Verlauf der Bespannung 4, bei der die Seitenlängen 4' und 4'' sich geradlinig erstrecken und einander in einem vorgegebenen Winkel, d.h. in einem Winkel von 90° schneiden, auch nach längerer Verwendung des Schlägers erhalten bleibt.Due to the possibility of movement of the covering 4 in the direction of the axis A on the inside of the frame 4, i.a. an increase in the effective playing area is achieved in such a way that the tennis racket with the normal size of the racket head 1 has the properties or almost the properties of a big head racket. The formation of the opening 12 with an oval cross-section, the larger cross-sectional axis of which lies in the axial direction A, also ensures that a deflection of the respective string length 4 'in an axial direction perpendicular to the plane of the drawing in FIG. 2 is not possible, so that, among other things. the desired course of the covering 4, in which the side lengths 4 'and 4' 'extend in a straight line and face each other at a predetermined angle, i.e. Cut at an angle of 90 °, even after using the racket for a long time.

Durch die Bewegungsmöglichkeit der Bespannung 4 in Richtung der Achse A wird weiterhin auch eine wesentliche Verbesserung des Spielkomforts dadurch erreicht, daß sich selbst bei sehr starr ausgebildetem Rahmen 3 eine verbesserte Dämpfung ergibt und darüber hinaus den Spielkomfort beeinträchtigende Schwingungen der Bespannung 4 vermieden werden.Due to the possibility of movement of the covering 4 in the direction of the axis A, a substantial improvement in the playing comfort is also achieved in that even with a very rigid frame 3 there is improved damping and, in addition, vibrations of the covering 4 which impair the playing comfort are avoided.

Bei der in der Fig. 3 dargestellten Ausführung besitzen die Öffnungen 11 und 10 einen ovalen Querschnitt, dessen längere Querschnittsachse in der Achsrichtung A verläuft. Der Außenquerschnitt der Hülse 9 entspricht dem Querschnitt der Öffnungen 10 und 11. Diese Ausführung hat den Vorteil, daß insbesondere an der Rahmeninnenseite zwischen zwei benachbarten Öffnungen 11 ein möglichst breiter Bereich verbleibt, in welchem die Wandung des Rahmenteils 3' nicht unterbrochen ist. Ein Großteil der Fasern 14 des faserverstärkten Kunststoffmaterials, die (Fasern) an der Rahmenaußenseite und an der Rahmeninnenseite sich kreuzend schräg zur Bespannungsebene BE verlaufen, sind also durch die Öffnungen 10 und 11 nicht unterbrochen. Andere Fasern 14, die durch diese Öffnungen unterbrochen sind, überlappen sich mit ausreichender Länge, so daß insgesamt an der kritischeren Rahmeninnenseite, an der der Abstand der Öffnungen 11 kleiner ist als der Abstand der Öffnungen 10 an der Außenseite, eine hohe Stabilität erreicht wird.In the embodiment shown in FIG. 3, the openings 11 and 10 have an oval cross section, the longer cross-sectional axis of which extends in the axial direction A. Of the External cross-section of the sleeve 9 corresponds to the cross-section of the openings 10 and 11. This embodiment has the advantage that in particular on the inside of the frame between two adjacent openings 11 there is as wide a region as possible, in which the wall of the frame part 3 'is not interrupted. A large part of the fibers 14 of the fiber-reinforced plastic material, which (fibers) on the outside of the frame and on the inside of the frame intersect at an angle to the covering plane BE, are not interrupted by the openings 10 and 11. Other fibers 14, which are interrupted by these openings, overlap with a sufficient length so that overall a high stability is achieved on the more critical inside of the frame, on which the distance between the openings 11 is smaller than the distance between the openings 10 on the outside.

Bei der in der Fig. 4 dargestellten Ausführungsform ist in der Öffnung 12 der Hülse 9, die die jeweilige Saitenlänge 4' bzw. 4'' im Bereich beider Bohrungen 10 und 11 umschließt, ein dämpfendes Material 13 eingebracht, welches bei der dargestellten Ausführungsform die jeweilige Öffnung 12 in ihrem von der Saitenlänge 4' bzw. 4'' nicht eingenommenen Teil vollständig ausfüllt. Das Material 13 ist ein dauerelastisches Material, welches beim Verformen Bewegungsenergie absorbiert, d.h. in Wärme umsetzt und dadurch dämpfend wirkt. Das Material 13 wird nach dem Einsetzen der Hülsen 9 und nach dem Bespannen des Schlägers in die Öffnungen 12 eingebracht. Durch den dichten Abschluß insbes. der Bohrungen 10 und 11 durch die Hülsen 9 ist sichergestellt, daß das Material 13 nur in die Öffnungen 12 und nicht in den Innenraum des hohlen Rahmens 3 bzw. des hohlen Rahmenteils 3' gelangt.In the embodiment shown in FIG. 4, a damping material 13 is introduced into the opening 12 of the sleeve 9, which surrounds the respective string length 4 'or 4' 'in the region of both bores 10 and 11, which in the embodiment shown the each opening 12 completely fills in its part not occupied by the string length 4 'or 4' '. The material 13 is a permanently elastic material which absorbs kinetic energy when deformed, i.e. converts to heat and has a dampening effect. The material 13 is introduced into the openings 12 after the sleeves 9 have been inserted and after the racket has been strung. The tight closure, in particular of the bores 10 and 11 through the sleeves 9, ensures that the material 13 only reaches the openings 12 and not the interior of the hollow frame 3 or the hollow frame part 3 '.

Durch das dämpfende Material 13 ergibt sich in Verbindung mit der Bewegungsmöglichkeit der Bespannung 4 in der Achsrichtung A eine wesentliche Verbesserung des Spielkomforts, und zwar u.a. auch dahingehend, daß selbst bei sehr starr ausgebildetem Rahmen 3 sich eine wesentlich verbesserte Dämpfung ergibt. Weiterhin werden u.a. auch den Spielkomfort beeinträchtigende Schwingungen der Bespannung 4 vermieden.The damping material 13, in conjunction with the possibility of movement of the covering 4 in the axial direction A, results in a substantial improvement in the playing comfort, in particular also in that even with a very rigid frame 3 there is a substantially improved damping. Furthermore, vibrations of the covering 4 which impair play comfort are avoided.

Ebenso wie bei der in der Fig. 2 dargestellten Ausführungsform steht auch bei der Ausführung nach Fig. 4 die Hülse 9 mit dem den Abschnitt 9' entfernt liegenden Ende geringfügig über die Innenseite des Rahmenteils 3' vor, wobei die Öffnung 12 vollständig, d.h. insbesondere auch im Bereich der Bohrung 11 mit dem Material 13 ausgefüllt ist. Hierdurch wird erreicht, daß das Material 13 dämpfend insbes. auch dort wirkt, wo im Bereich der Hülse 9 das größte Ausweichen der Bespannung 4 möglich ist. Weiterhin wird durch die beschriebene Ausbildung auch erreicht, daß dort, wo die größten Kräfte beim Dämpfen auf das Material 13 ausgeübt werden, sich für das Material 13 über die Hülse 9 eine direkte Abstützung am Rahmenteil 3' ergibt, und zwar im wesentlichen ohne Belastung der Hülse 9 bzw. des Abschnittes 9'' mit Biegemomenten.Just as in the embodiment shown in FIG. 2, in the embodiment according to FIG. 4, the sleeve 9 with the end lying away from the section 9 'projects slightly beyond the inside of the frame part 3', the opening 12 completely, i.e. is also filled with the material 13, in particular in the region of the bore 11. This ensures that the material 13 has a damping effect, in particular where the greatest evasion of the covering 4 is possible in the region of the sleeve 9. Furthermore, it is achieved by the described design that where the greatest forces are exerted on the material 13 when damping, there is a direct support for the material 13 on the sleeve 9 on the frame part 3 ', essentially without loading the Sleeve 9 or section 9 '' with bending moments.

Fig. 5 zeigt in ähnlicher Darstellung wie Fig. 3 eine weitere Ausführung, bei der die Hülsen 7 jeweils einen kreiszylinderförmigen Außenquerschnitt aufweisen und bei der dementsprechend auch die Öffnungen 10 und 11 im Rahmenteil 3' kreiszylinderförmig ausgebildet sind. Auch bei dieser Ausführungsform weist die Bohrung 12 jeder Hülse wiederum den oben beschriebenen Querschnitt auf, der sich in der Querschnittsachse senkrecht zur Bespannungsebene BE trompeten- bzw. kegelartig verbreitert, so daß ein Ausweichen der Bespannung 4 in der Achsrichtung A möglich ist, und zwar durch freies Bewegen der Bespannung in der Bohrung 12, während eine Bewegung in der Bespannungsebene BE und senkrecht zu der jeweiligen Saitenlänge 4' bzw. 4'' nicht oder zumindest im wesentlichen nicht möglich ist.FIG. 5 shows, in a representation similar to FIG. 3, a further embodiment in which the sleeves 7 each have a circular cylindrical outer cross section and accordingly the openings 10 and 11 in the frame part 3 'are circular cylindrical. In this embodiment, too, the bore 12 of each sleeve again has the cross-section described above, which widens in the cross-sectional axis perpendicular to the clothing plane BE in the manner of a trumpet or cone, so that the covering 4 can be avoided in the axial direction A, namely through free movement of the stringing in the bore 12, while a movement in the stringing plane BE and perpendicular to the respective string length 4 'or 4' 'is not or at least essentially not possible.

Die Erfindung wurde voranstehend an Ausführungsbeispielen beschrieben. Es versteht sich, daß Änderungen sowie Abwandlungen möglich sind, ohne daß dadurch der der Erfindung zugrundeliegender Erfindungsgedanke verlassen wird. So ist es beispielsweise möglich, den in den Fig. 2 und 4 dargestellten Ausführungsformen die Öffnung 10 so auszuführen, daß sie einem Vergleich zur Öffnung 11 kleineren Durchmesser aufweist. In diesem Fall ist dann der hülsenartige Abschnitt 9'' am Übergangsbereich zum Abschnitt 9' mit einer Umfangsnut 15 versehen, in die der Rand der Öffnung 10 eingreift. Unabhängig hiervon sind die Hülse 9 bevorzugt Teil einer Hülsenleiste.The invention has been described above using exemplary embodiments. It goes without saying that changes and modifications are possible without thereby departing from the inventive concept on which the invention is based. For example, it is possible to design the opening 10 in the embodiments shown in FIGS. 2 and 4 so that it has a smaller diameter than the opening 11. In this case, the sleeve-like section 9 ″ is provided at the transition area to the section 9 ′ with a circumferential groove 15 into which the edge of the opening 10 engages. Irrespective of this, the sleeve 9 are preferably part of a sleeve strip.

Die Ausführungsform nach Fig. 5 hat den Vorteil, daß die kreiszylinderförmigen Öffnungen 10 und 11 leicht hergestellt werden können, gleichzeitig aber ein Ausweichen der Bespannung 4 nur in der Achsrichtung A möglich ist.The embodiment according to FIG. 5 has the advantage that the circular cylindrical openings 10 and 11 can be easily produced, but at the same time the covering 4 can only evade in the axial direction A.

Aufstellung der verwendeten BezugsziffernList of the reference numbers used

11
SchlägerkopfClub head
22nd
SchlägergriffRacket grip
33rd
Rahmenframe
3'3 '
RahmenteilFrame part
44th
BespannungCovering
4', 4''4 ', 4' '
SaitenlängeString length
9, 9', 9''9, 9 ', 9' '
Abschnittsection
10, 1110, 11
Bohrungdrilling
1212th
Öffnungopening
1313
dämpfendes Materialdamping material
1414
Faserfiber
1515
NutGroove

Claims (10)

  1. Racket, in particular tennis racket, with a hollow, outwardly closed frame (3) which forms a racket grip (2) and with a frame portion (3') a racket head (1), and with stringing (4) on the racket head (1) formed by string lengths (4', 4'') crossing itself, in which for the mounting of the stringing (4) or for the string fastening on the frame portion (3') openings in this (10, 11) with sockets (9) are provided, which close the frame portion (3') shut at the openings (10, 11) there to the outside and have openings (12) on the inner side, through which the string lengths (4, 4') are led through from the frame inner side to the frame outer side and the other way around in the axis direction of each socket (9) and which has at least partly an increasing cross section in the axis direction, characterised in that for at least a part of the string lengths (4', 4''), a string fastening is provided, with which the string lengths (4', 4'') on the frame inner side, at least in an axis direction (A) perpendicular to the stringing plane (BE) have a mobility, which is substantially larger than a corresponding mobility on the frame outside, and that for this string fastening the accompanying sockets (9) each have a socket opening (12) increasing in cross section toward the frame inner side, which on the frame inner side at least in the axis direction (A) perpendicular to the stringing plane (BE) has a dimension which is greater than the cross section of the string lengths (4', 4'').
  2. Racket according to claim 1 characterised in that the cross section of the socket openings (12) increases trumpet or cone like toward the frame inner side.
  3. Racket according to claim 1 or 2 characterised in that the socket openings (12) have an oval cross section, their longer cross section side lying in the axis direction perpendicular to the stringing plane (BE).
  4. Racket according to one of claims 1-3 characterised in that the borings (10, 11) in the frame portion (3') on the frame inner side receiving the sockets (9), preferably also have an oval cross section on the frame outer side, whose longer cross section axis lies in an axis direction perpendicular to the stringing plane (BE), in which the socket (9) for example has an oval outer cross section.
  5. Racket according to one of claims 1-3 characterised in that the borings (10, 11) in the frame portion (3') receiving the sockets (9) on the frame inner side, preferably also have on the frame outer side a circularly formed cross section.
  6. Racket according to one of claims 1-5 characterised in that the boring (7, 10) provided on the outer side in the frame portion (3') for the receiving of the socket (9) has a cross section which is smaller than the cross section of a boring (11) provided on the frame inner side.
  7. Racket according to one of claims 1-6, characterised in that the sockets (9) close shut the frame portion (3') at the borings (10, 11) there toward the outside.
  8. Racket according to one of claims 1-7 characterised in that at least for a part of the socket (9) each opening (12) in its area not occupied by each string length (4', 4'') is at least partly implemented with a permanently elastic dampening material (13), which is preferably an artificial material and/or is preferably substantially softer or is substantially less hard than the material of each socket (9).
  9. Racket according to claim 8 characterised in that the opening (12) in its area not occupied by each string length (4', 4'') is completely filled with the dampening material (13).
  10. Racket according to claim 8 or 9 characterised in that the dampening material (13) is introduced into the openings (12) of the sockets (9) after the stringing of the racket head (1).
EP93101142A 1992-01-29 1993-01-26 Racket, particularly tennis racket Expired - Lifetime EP0553769B1 (en)

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
DE4202476 1992-01-29
DE4202476 1992-01-29
DE4203682 1992-02-08
DE4203682A DE4203682C2 (en) 1992-01-29 1992-02-08 Ball game rackets, in particular tennis rackets
DE4229898 1992-09-08
DE4229898A DE4229898A1 (en) 1992-02-08 1992-09-08 Ball game racquet with hollow frame

Publications (2)

Publication Number Publication Date
EP0553769A1 EP0553769A1 (en) 1993-08-04
EP0553769B1 true EP0553769B1 (en) 1996-01-03

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US (1) US5332213A (en)
EP (1) EP0553769B1 (en)
JP (1) JP2534963B2 (en)
AT (1) ATE132381T1 (en)
CA (1) CA2088236C (en)

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JPH05345052A (en) 1993-12-27
CA2088236A1 (en) 1993-07-30
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EP0553769A1 (en) 1993-08-04
JP2534963B2 (en) 1996-09-18
CA2088236C (en) 2001-11-20

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