EP0043012B1 - Frame for a tennis racket - Google Patents

Frame for a tennis racket Download PDF

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Publication number
EP0043012B1
EP0043012B1 EP81104487A EP81104487A EP0043012B1 EP 0043012 B1 EP0043012 B1 EP 0043012B1 EP 81104487 A EP81104487 A EP 81104487A EP 81104487 A EP81104487 A EP 81104487A EP 0043012 B1 EP0043012 B1 EP 0043012B1
Authority
EP
European Patent Office
Prior art keywords
frame
section
hollow
heart
laminated
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
Application number
EP81104487A
Other languages
German (de)
French (fr)
Other versions
EP0043012A1 (en
Inventor
Reinhold Sommer
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.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to AT81104487T priority Critical patent/ATE12184T1/en
Publication of EP0043012A1 publication Critical patent/EP0043012A1/en
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Publication of EP0043012B1 publication Critical patent/EP0043012B1/en
Expired legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B49/00—Stringed rackets, e.g. for tennis
    • A63B49/02—Frames
    • A63B49/03—Frames characterised by throat sections, i.e. sections or elements between the head and the shaft

Definitions

  • the invention relates to a frame formed from a hollow profile for a tennis racket, the heart of which is also formed from a hollow profile, wherein a shaped piece is attached to each leg of the frame in the area of the central piece and one end of the central piece is connected to the shaped piece.
  • the hollow profile generally consists of metal or metal-reinforced plastic.
  • the centerpiece In the case of frames for tennis rackets, the centerpiece is often connected to the frame by means of rivets.
  • a frame for tennis rackets is known, the centerpiece of which has four ore facing the frame profile, which are connected to the frame profile by means of rivets (GB-A-212 195).
  • the ore is subjected to tension and the rivets to shear.
  • the rivet When using this tennis racket, the rivet is so heavily stressed that the rivet heads gradually loosen.
  • loud, unpleasant noises occur when using the tennis racket, i.e. when playing tennis, which are caused by friction between the centerpiece and the frame and between the rivets and the aforementioned parts. It also happens that the rivets break.
  • this tennis racket has the considerable disadvantage that it twists when the ball does not hit the center of the hitting surface, with the result that the ball does not fly in the desired direction.
  • the invention has for its object to form a frame of the type mentioned in such a way that a secure connection of the heart to the frame is guaranteed and that this secure connection is maintained even after prolonged use of the tennis racket.
  • each fitting is attached with one of its end faces on the inside of the frame and with the other end face in the longitudinal direction of the frog and that one end of the frog approximately in the longitudinal direction the centerpiece is plugged onto one of the shaped pieces or inserted into one of the shaped pieces.
  • the centerpiece sits immovably between the two legs of the frame.
  • the outer shape of the shaped pieces corresponds approximately to the shape of the interior of the hollow profile forming the heart piece, so that the ends of the hollow profile forming the heart piece can be plugged onto the shaped pieces. This gives the tennis racket a particularly pleasing appearance.
  • each shaped piece either has a cavity at its end facing the frog, the shape of which approximately corresponds to the outer shape of the hollow profile forming the frog, or each shaped piece is provided at its end facing the frog with an annular groove, the cross section of which is approximately corresponds to the cross section of the hollow profile forming the core.
  • Each molded part is expediently connected to the frame by means of a screw.
  • measures which are generally known in the art can be used to secure the screw nut against unintentional loosening without any particular effort.
  • the attachment of the shaped pieces to the frame can be made even more durable by applying an adhesive between the contacting surfaces of each shaped piece and the frame.
  • a particularly favorable course of forces at the transition points between the frame and the heart piece results from the fact that the heart piece is formed from the same profile as the frame.
  • the frame 1 shown in the drawing is formed from a hollow profile.
  • a shaped piece 3 is fastened by means of a screw 4 (FIGS. 2 and 3).
  • the ends of the hollow profile forming the centerpiece 2 are pushed onto the two shaped pieces 3.
  • the ends of the core section 2 forming the hollow profile can also be inserted into the shaped pieces 3; in Fig. 2 is a corresponding fitting 3 indicated by dash-dotted lines.
  • An adhesive is provided between the contacting surfaces of the frame 1 and the shaped pieces 3 and the heart piece 2 and the shaped pieces 3.

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  • Health & Medical Sciences (AREA)
  • Pulmonology (AREA)
  • General Health & Medical Sciences (AREA)
  • Physical Education & Sports Medicine (AREA)
  • Transition And Organic Metals Composition Catalysts For Addition Polymerization (AREA)
  • Polarising Elements (AREA)
  • Golf Clubs (AREA)
  • Standing Axle, Rod, Or Tube Structures Coupled By Welding, Adhesion, Or Deposition (AREA)
  • Body Structure For Vehicles (AREA)
  • Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)

Abstract

A tennis racket frame, having a heart piece bridging opposite sides of the frame, is provided at the opposite sides of the frame with members interfitting with the tubular heart piece and bolted to the frame members.

Description

Die Erfindung betrifft einen aus einem Hohlprofil gebildeten Rahmen für einen Tennisschläger, dessen Herzstück ebenfalls aus einem Hohlprofil gebildet ist, wobei an jedem Schenkel des Rahmens im Bereich des Herzstücks jeweils ein Formstück befestigt und jeweils ein Ende des Herzstücks mit dem Formstück verbunden ist. Das Hohlprofil besteht bei derartigen Rahmen in der Regel aus Metall oder aus metallverstärktem Kunststoff.The invention relates to a frame formed from a hollow profile for a tennis racket, the heart of which is also formed from a hollow profile, wherein a shaped piece is attached to each leg of the frame in the area of the central piece and one end of the central piece is connected to the shaped piece. In such frames, the hollow profile generally consists of metal or metal-reinforced plastic.

Bei Rahmen für Tennisschläger ist das Herzstück häufig mittels Nieten mit dem Rahmen verbunden. So ist ein Rahmen für Tennisschläger bekannt, dessen Herzstück vier dem Rahmenprofil zugewandte Öre aufweist, die mittels Nieten mit dem Rahmenprofil verbunden sind (GB-A-212 195). Dabei werden die Öre auf Zug und die Nieten auf Abscherung beansprucht. Beim Gebrauch dieses Tennisschlägers wird die Nietung so stark beansprucht, dass sich nach und nach die Nietköpfe lockern. Das führt dazu, dass beim Gebrauch des Tennisschlägers, also beim Tennisspielen, laute unangenehme Geräusche auftreten, die durch Reibung zwischen dem Herzstück und dem Rahmen sowie zwischen den Nieten und den vorgenannten Teilen verursacht werden. Auch kommt es vor, dass die Nieten brechen. Darüber hinaus weist dieser Tennisschläger den erheblichen Nachteil auf, dass er sich verdreht, wenn der Ball nicht genau mittig auf die Schlagfläche auftrifft, mit der Folge, dass der Ball nicht in die gewünschte Richtung fliegt.In the case of frames for tennis rackets, the centerpiece is often connected to the frame by means of rivets. A frame for tennis rackets is known, the centerpiece of which has four ore facing the frame profile, which are connected to the frame profile by means of rivets (GB-A-212 195). The ore is subjected to tension and the rivets to shear. When using this tennis racket, the rivet is so heavily stressed that the rivet heads gradually loosen. As a result, loud, unpleasant noises occur when using the tennis racket, i.e. when playing tennis, which are caused by friction between the centerpiece and the frame and between the rivets and the aforementioned parts. It also happens that the rivets break. In addition, this tennis racket has the considerable disadvantage that it twists when the ball does not hit the center of the hitting surface, with the result that the ball does not fly in the desired direction.

Bei einem anderen bekannten Rahmen der eingangs genannten Art für einen Tennisschläger sind die Enden des aus einem Hohlprofil gebildeten Herzstückes in als muffenartige Ringe ausgebildete Formstücke eingesteckt, die das Rahmenprofil umschliessen (GB-A-246 763). Ferner sind die Enden des Herzstücks mit den muffenartigen Ringen verschweisst. Durch das Schweissen treten jedoch Werkstoffspannungen auf, die zum frühzeitigen Bruch des Rahmens führen. Durch die Art der Befestigung des Herzstücks mit dem Rahmen kann der Rahmen auch nicht sehr torsionssteif ausgebildet werden. Rahmen dieser Art haben sich daher in der Praxis nicht durchsetzen können.In another known frame of the type mentioned at the beginning for a tennis racket, the ends of the centerpiece formed from a hollow profile are inserted into shaped pieces designed as sleeve-like rings which enclose the frame profile (GB-A-246 763). Furthermore, the ends of the heart are welded to the sleeve-like rings. However, welding causes material stresses that lead to premature breakage of the frame. Because of the way in which the centerpiece is fastened to the frame, the frame cannot be made very torsionally rigid. Frameworks of this type have therefore not been able to establish themselves in practice.

Der Erfindung liegt die Aufgabe zugrunde, einen Rahmen der eingangs genannten Art derart auszubilden, dass eine sichere Verbindung des Herzstücks mit dem Rahmen gewährleistet ist und dass diese sichere Verbindung auch nach längerem Gebrauch des Tennisschlägers erhalten bleibt.The invention has for its object to form a frame of the type mentioned in such a way that a secure connection of the heart to the frame is guaranteed and that this secure connection is maintained even after prolonged use of the tennis racket.

Die Lösung der gestellten Aufgabe besteht darin, dass bei einem Rahmen der eingangs genannten Art jedes Formstück mit einer seiner Stirnflächen auf der Innenseite des Rahmens befestigt ist und mit der anderen Stirnfläche in Längsrichtung des Herzstückes weist und dass jeweils ein Ende des Herzstücks in etwa der Längsrichtung des Herzstücks auf eines der Formstücke aufgesteckt oder in eines der Formstücke eingesteckt ist. Dadurch sitzt das Herzstück zwischen den beiden Schenkeln des Rahmens unverrückbar fest.The solution to the problem is that in a frame of the type mentioned, each fitting is attached with one of its end faces on the inside of the frame and with the other end face in the longitudinal direction of the frog and that one end of the frog approximately in the longitudinal direction the centerpiece is plugged onto one of the shaped pieces or inserted into one of the shaped pieces. As a result, the centerpiece sits immovably between the two legs of the frame.

Bei einer bevorzugten Ausführungsform der Erfindung entspricht die äussere Form der Formstücke etwa der Form des Innenraumes des das Herzstück bildenden Hohlprofils, so dass die Enden des das Herzstück bildenden Hohlprofils auf die Formstücke aufgesteckt werden können. Dadurch erhält der Tennisschläger ein besonders gefälliges Aussehen.In a preferred embodiment of the invention, the outer shape of the shaped pieces corresponds approximately to the shape of the interior of the hollow profile forming the heart piece, so that the ends of the hollow profile forming the heart piece can be plugged onto the shaped pieces. This gives the tennis racket a particularly pleasing appearance.

Bei anderen Ausführungsformen der Erfindung weist entweder jedes Formstück an seinem dem Herzstück zugewandten Ende einen Hohlraum auf, dessen Form etwa der äusseren Form des das Herzstück bildenden Hohlprofils entspricht, oder ist jedes Formstück an seinem dem Herzstück zugewandten Ende mit einer Ringnut versehen, deren Querschnitt etwa dem Querschnitt des das Herzstück bildenden Hohlprofils entspricht.In other embodiments of the invention, each shaped piece either has a cavity at its end facing the frog, the shape of which approximately corresponds to the outer shape of the hollow profile forming the frog, or each shaped piece is provided at its end facing the frog with an annular groove, the cross section of which is approximately corresponds to the cross section of the hollow profile forming the core.

Zweckmässigerweise ist jedes Formstück mittels einer Schraube mit dem Rahmen verbunden. Bei Schraubverbindungen kann durch in der Technik allgemein bekannte Massnahmen ohne besonderen Aufwand eine Sicherung der Schraubenmutter gegen unbeabsichtigtes Lösen herbeigeführt werden.Each molded part is expediently connected to the frame by means of a screw. In the case of screw connections, measures which are generally known in the art can be used to secure the screw nut against unintentional loosening without any particular effort.

Die Befestigung der Formstücke an dem Rahmen kann in weiterer Ausgestaltung der Erfindung dadurch noch haltbarer gemacht werden, dass zwischen den sich berührenden Flächen jedes Formstückes und des Rahmens ein Kleber aufgebracht ist.In a further embodiment of the invention, the attachment of the shaped pieces to the frame can be made even more durable by applying an adhesive between the contacting surfaces of each shaped piece and the frame.

Um eine Bewegung des Herzstückes gegenüber den Formstücken auch dann mit Sicherheit auszuschliessen, wenn infolge ungünstiger Toleranzen zwischen den Formstücken und den diese umgreifenden bzw. in diese eingreifenden Enden des das Herzstück bildenden Profils ein Ringspalt vorhanden sein sollte, ist nach einem weiteren Merkmal der Erfindung zwischen den sich berührenden Flächen jedes Formstückes und des Herzstückes ein Kleber aufgebracht.In order to exclude a movement of the frog with respect to the fittings with certainty even if there should be an annular gap due to unfavorable tolerances between the fittings and the ends encompassing or engaging in the ends of the profile forming the frog, according to a further feature of the invention between an adhesive is applied to the contacting surfaces of each fitting and the heart.

Ein besonders günstiger Kräfteverlauf an den Übergangsstellen zwischen dem Rahmen und dem Herzstück ergibt sich dadurch, dass das Herzstück aus dem gleichen Profil gebildet ist wie der Rahmen.A particularly favorable course of forces at the transition points between the frame and the heart piece results from the fact that the heart piece is formed from the same profile as the frame.

In der Zeichnung ist ein Ausführungsbeispiel der Erfindung dargestellt. Es zeigen:

  • Fig. 1 einen Rahmen für einen Tennisschläger in Vorderansicht,
  • Fig. 2 die in Fig. 1 durch den Kreis II gekennzeichnete Einzelheit in grösserem Massstab,
  • Fig. 3 einen Schnitt nach der Linie 111-111 in Fig. 2.
In the drawing, an embodiment of the invention is shown. Show it:
  • 1 shows a frame for a tennis racket in front view,
  • 2 shows the detail identified by the circle II in FIG. 1 on a larger scale,
  • 3 shows a section along the line 111-111 in FIG. 2nd

Der in der Zeichnung dargestellte Rahmen 1 ist aus einem Hohlprofil gebildet. An den beiden Innenseiten des Rahmens 1, im Bereich des ebenfalls aus einem Hohlprofil gebildeten Herzstückes 2, ist jeweils ein Formstück 3 mittels einer Schraube 4 befestigt (Fig. 2 und Fig. 3). Auf die beiden Formstücke 3 sind die Enden des das Herzstück 2 bildenden Hohlprofils aufgesteckt. Die Enden des das Herzstück 2 bildenden Hohlprofils können aber auch in die Formstücke 3 eingesteckt sein; in Fig. 2 ist ein entsprechendes Formstück 3 mit strichpunktierten Linien angedeutet. Zwischen den sich berührenden Flächen des Rahmens 1 und der Formstücke 3 sowie des Herzstückes 2 und der Formstücke 3 ist ein Kleber vorgesehen.The frame 1 shown in the drawing is formed from a hollow profile. On the two inner sides of the frame 1, in the area of the frog 2, which is also formed from a hollow profile, a shaped piece 3 is fastened by means of a screw 4 (FIGS. 2 and 3). The ends of the hollow profile forming the centerpiece 2 are pushed onto the two shaped pieces 3. The ends of the core section 2 forming the hollow profile can also be inserted into the shaped pieces 3; in Fig. 2 is a corresponding fitting 3 indicated by dash-dotted lines. An adhesive is provided between the contacting surfaces of the frame 1 and the shaped pieces 3 and the heart piece 2 and the shaped pieces 3.

Claims (8)

1. A hollow-section frame (1) for a tennis racket, whose frame heart (2) is hollow-sectioned as well; whereby, on each frame leg (1) in the area of the frame heart (2), one laminated moulding (3) each is fastened and one of the respective ends of the frame heart (2) is connected with the laminated moulding (3); characterised in that each of the laminated mouldings (3) is fastened with one of its cross-cut ends to the inside of the frame (1) and points with its other cross-cut end in the approximately lengthwise direction of the frame heart (2) and that one end each of the frame heart (2) is attached to or stuck into one of the laminated mouldings (3) in the approximately lengthwise direction of the frame heart (2).
2. A hollow-section frame in accordance with Claim 1 characterised in that the outer form of the laminated mouldings (3) corresponds approximately to the form of the inner chamber of the hollow section building the frame heart (2).
3. A hollow-section frame in accordance with 1 characterised in that each laminated moulding (3) contains a cavity within the end facing the frame heart (2) that corresponds approximately to the outer form of the cross section building the frame heart (2).
4. A hollow-section frame in accordance with 1 characterised in that each laminated moulding (3) is fitted with a snap ring groove whose cross- section corresponds approximately to the cross- section of the hollow section building the frame heart (2).
5. A hollow-section frame in accordance with 1 to 4 characterised in that each laminated moulding (3) is connected to the main frame (1) by means of a screw (4).
6. A hollow-section frame in accordance with 1 to 5 characterised in that a glue is applied between the contact surfaces of the laminated moulding (3) and the main frame (1).
7. A hollow-section frame in accordance with 1 to 6 characterised in that a glue is applied between the contact surfaces of each of the laminated mouldings (3) and the frame heart (2).
8. A hollow-section frame in accordance with 1 to 7 characterised in that the frame heart (2) is constructed with the same hollow section as that of the main frame.
EP81104487A 1980-06-27 1981-06-11 Frame for a tennis racket Expired EP0043012B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT81104487T ATE12184T1 (en) 1980-06-27 1981-06-11 FRAME FOR A TENNIS RACKET.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19803024234 DE3024234A1 (en) 1980-06-27 1980-06-27 FRAME FOR A TENNIS RACKET
DE3024234 1980-06-27

Publications (2)

Publication Number Publication Date
EP0043012A1 EP0043012A1 (en) 1982-01-06
EP0043012B1 true EP0043012B1 (en) 1985-03-20

Family

ID=6105701

Family Applications (1)

Application Number Title Priority Date Filing Date
EP81104487A Expired EP0043012B1 (en) 1980-06-27 1981-06-11 Frame for a tennis racket

Country Status (5)

Country Link
US (1) US4550909A (en)
EP (1) EP0043012B1 (en)
JP (1) JPS5739862A (en)
AT (1) ATE12184T1 (en)
DE (2) DE3024234A1 (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT385901B (en) * 1985-09-09 1988-06-10 Head Sportgeraete Gmbh TENNIS RACKET FRAME WITH A HEART PIECE
DE4114014A1 (en) * 1991-04-29 1992-11-05 Reinhold Sommer Moulded piece on each arm of centre of hollow tennis racquet frame - is screwed with head inside hollow frame in hole covered by cap
DE102007056831B4 (en) * 2007-11-26 2015-10-22 Head Technology Gmbh Racket with joint
ES2384646T3 (en) * 2007-11-26 2012-07-10 Head Technology Gmbh Racket with a mobile housed bridge
CN202061326U (en) * 2011-05-11 2011-12-07 源民安企业股份有限公司 Weight-changeable racket
US20160250533A1 (en) * 2015-01-29 2016-09-01 Tom O'Rourke Modular Paddle

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB191104128A (en) * 1911-02-18 1911-04-20 Cecil George Mckellar Improvements in Tennis Racquets.
US1202177A (en) * 1916-03-27 1916-10-24 Francis G Gale Bedstead.
GB212195A (en) * 1923-09-18 1924-03-06 Hobbies Ltd Improvements in metal framed tennis and similar racquets
GB246763A (en) * 1925-10-19 1926-02-04 Robert Rose Improvements in the manufacture of metal frames for tennis and like racquets
GB381673A (en) * 1931-08-28 1932-10-13 Accles & Pollock Ltd Improvements relating to tennis, badminton, and like racquets and their manufacture
US2373045A (en) * 1944-08-22 1945-04-03 George E Osborn Crutch
US2556121A (en) * 1949-07-13 1951-06-05 Jean D Thomas Detachable wheel chair walking apparatus
FR1049128A (en) * 1952-01-15 1953-12-28 End cap especially for cycle handlebars
FR1260715A (en) * 1960-03-30 1961-05-12 Tennis racket or similar games
BE724248A (en) * 1967-11-22 1969-05-02
US3612526A (en) * 1969-09-19 1971-10-12 Joseph M Brull Racket with metal i-beam frame
GB1479454A (en) * 1974-07-09 1977-07-13 Allen E Games racket
US4247103A (en) * 1979-04-04 1981-01-27 Garver John P Tennis racket

Also Published As

Publication number Publication date
US4550909A (en) 1985-11-05
EP0043012A1 (en) 1982-01-06
JPS5739862A (en) 1982-03-05
ATE12184T1 (en) 1985-04-15
DE3024234A1 (en) 1982-01-21
DE3169354D1 (en) 1985-04-25

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