EP0106850B1 - Raquette de tennis ou de squash - Google Patents

Raquette de tennis ou de squash Download PDF

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Publication number
EP0106850B1
EP0106850B1 EP83900929A EP83900929A EP0106850B1 EP 0106850 B1 EP0106850 B1 EP 0106850B1 EP 83900929 A EP83900929 A EP 83900929A EP 83900929 A EP83900929 A EP 83900929A EP 0106850 B1 EP0106850 B1 EP 0106850B1
Authority
EP
European Patent Office
Prior art keywords
strings
frame
racket
string
handle
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
EP83900929A
Other languages
German (de)
English (en)
Other versions
EP0106850A1 (fr
Inventor
Herwig Fischer
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
Priority claimed from DE19823211738 external-priority patent/DE3211738A1/de
Application filed by Individual filed Critical Individual
Priority to AT83900929T priority Critical patent/ATE20575T1/de
Publication of EP0106850A1 publication Critical patent/EP0106850A1/fr
Application granted granted Critical
Publication of EP0106850B1 publication Critical patent/EP0106850B1/fr
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
    • A63B51/00—Stringing tennis, badminton or like rackets; Strings therefor; Maintenance of racket strings
    • 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
    • A63B51/00—Stringing tennis, badminton or like rackets; Strings therefor; Maintenance of racket strings
    • A63B51/08—Diagonal stringing
    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B51/00—Stringing tennis, badminton or like rackets; Strings therefor; Maintenance of racket strings
    • A63B51/10—Reinforcements for stringing
    • A63B51/11—Intermediate members for the cross-points of the strings
    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B51/00—Stringing tennis, badminton or like rackets; Strings therefor; Maintenance of racket strings
    • A63B51/12—Devices arranged in or on the racket for adjusting the tension of the strings
    • 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

Definitions

  • the invention relates to a tennis or squash racket with an essentially elliptical frame, a handle connected to this and a string attached within the frame made of strings crossing each other, the at least one on the frame with low friction and several times stretched over the frame with in includes essentially parallel string sections.
  • the strings are passed over the frame surface with a uniform or slightly differentiated tension and fixed at their ends in the frame. Since a large number of parameters are involved in the playing behavior of a tennis racket, some of which have opposing characteristics, it is at most possible with such a covering to give the stringing at the ideal point of impact of the ball, the "sweet spot", favorable tension and impact loss properties . When the "sweet spot” is optimized, it is generally not possible to optimize other areas of the covering at the same time. As a result, balls that do not hit the "sweet spot" are relatively difficult to control and strain the wrist of the player.
  • a tennis racket is known from GB-A-380 915, in which the strings are guided over deflection rollers mounted in the frame and a number of tensioning devices are provided on the frame for individually tensioning individual strings.
  • this solution enables the tension behavior of the strings to be corrected, but is still tied to essential parameters which impair optimal tension distribution, such as, in particular, the stretchable string length and the course of the string.
  • FR-A-784 057 describes a tennis racket in which a continuous, endless string is also guided over rollers in the frame and is connected to a tensioning device in the transition area between the handle and the frame, which is referred to as the heart of the tennis racket change of the total tension by the player himself.
  • this solution does not allow individual selection of the tension of individual strings and the tension gradient in the racket, it has also only proven to be of limited functionality, since the considerable friction occurring at the crossing points of the strings leads to the tensioning device applying Preload is only spread over the entire stringing in a very slow creep process.
  • the object of the invention is to improve the elastic properties of the strings, in particular when the ball contact is not central.
  • This object is achieved in that the immediately adjacent parallel string sections belong to different strings and that the distance between the string sections belonging to the same string is at least about a ball radius.
  • the strings are preferably at least partially extended beyond the frame area, and the string sections extending beyond the frame area are freely stretchable and connected to the string sections lying in the frame area via a low-friction deflection.
  • the strings are preferably extended into the hollow handle and possibly down to the bottom.
  • the elongated strings are preferably fastened within the handle in arbitrarily selectable longitudinal positions of an elongated slider which can be displaced longitudinally in the handle; that can be moved with the help of a clamping device.
  • This tensioning device offers the user the possibility of raising and lowering the overall tension of the tennis racket, which is optimized with regard to the tension distribution. It is quite possible and under certain circumstances it is even intended that the tensioning process will produce effects of different strengths according to the different string lengths.
  • the frame In conventional tennis rackets, the frame is usually designed in such a way that it is capable of absorbing shock losses within certain limits.
  • the absorption of impact losses, which occur particularly in non-central ball contacts, can take place according to the invention in that the slider as such is suspended elastically or elastically damped.
  • the deflection between the string section lying within the frame and the string section extending beyond the frame is admittedly reduced in the pulling direction into the interior of the frame surface, that is to say when a string is deflected upon impact, it is braked in the opposite direction.
  • a tennis racket shown in FIG. 1 comprises a handle 10 and a frame 12.
  • the handle is hollow and has a plate 14 closing the handle at its free end.
  • a string generally designated 16 which is indicated in FIG. 1 only by a single, completely drawn-in string 22 and a further string 24, which is only partially shown.
  • a longitudinally displaceable slide piece 18 is attached within the hollow handle 10.
  • a clamping bolt 20 is freely rotatable, which enters with thread engagement in the lower end of the slider 18, so that a longitudinal displacement of the slider 18 can be achieved within the handle 10 by rotating the clamping bolt.
  • the individual strings of the strings 16 extend through bores 26 arranged in longitudinal sections in the sliding piece 18 and can thus be re-tensioned by the user together with the aid of the tensioning bolt 20.
  • the tennis racket has a diagonal covering.
  • the string 22 is fixed to the frame at point A at the bottom left in FIG. 1 and extends with a first section 22a diagonally across the frame surface to a deflection roller 28. From there, the string 22 is outside the frame 12 to a further deflection roller 30 guided. A subsequent section 22b of the string 22 runs parallel to the section 22a to a deflection roller 32 (point C). From the deflection roller 32, the string 22 runs through one of the bores 26 of the slide piece 18 within the hollow handle 10 (point D) to a further deflection roller 34.
  • Two further sections 22c, 22d of the string 22 which are parallel to one another are symmetrical to the string sections via deflection rollers 38 22a, 22b.
  • the end of the string section 22d is fixed at point B on the frame 12.
  • the distance between the parallel string sections 22a and 22b or 22c and 22d corresponds approximately to the radius of a tennis ball.
  • the other strings of the strings 16 are essentially similar to the strings 22.
  • the parallel string sections of the individual strings have essentially the same distances and accommodate the string sections of other strings between them.
  • a string section 24d of a string 24 extends between the string sections 22c, 22d of the string 22, while the string section 24c parallel thereto extends outside the string sections 22c, 22d.
  • the string sections 22a, 22c and 24d are hit directly by the ball and stretched accordingly.
  • the tensile force occurring in these string sections is transmitted almost undiminished to the string sections 22b, 22d and 24c by the deflection rollers, so that there is an increased tension in an annular area around the point P.
  • the resulting deflection of the strings 16 is shown schematically in FIG. 2. While the stringing is curved concavely to the ball in the usual way directly in the area of the ball contact zone, due to the increased tension there is a in the adjacent sections F of the stringing convex curvature recognizable.
  • the ball 42 is therefore received in a relatively narrow trough, which gives the ball guidance and ensures that the ball 42 is accelerated in a direction perpendicular to the plane E of the frame surface when the strings spring back.
  • the parallel groups of string sections which in FIG. 1 are represented on the one hand by the string sections 22a, 22b and on the other hand by the string sections 22c, 22d, 24c and 24d, are in arranged on two different levels.
  • the strings are not networked with each other, but run freely past each other.
  • the string sections are connected to one another at the crossing points by connecting pieces.
  • Such a connector is shown in Fig. 13 and designated 110.
  • the connecting piece 110 is formed by two rings 112, 114 which are firmly connected to one another and which are oriented perpendicularly to one another with their central axes and each run through with low friction on a string section 70 or 70 '.
  • the strings are networked with one another in the usual way.
  • the strings advantageously have a flattened cross-section, the dimensions of which are reduced in the direction perpendicular to the plane of the frame surface, so that the strings which are networked with one another are pressed against one another with only a relatively small force at the nodes.
  • the flattened strings advantageously comprise two cores of tensile material which are square or round in cross-section and which are surrounded by a common casing made of friction-reducing material.
  • the sheath has a rectangular or elliptical cross section, or consists of two cross-sectional areas each receiving a core, which are connected to one another by a web.
  • the string is provided with only one core.
  • a reduction in node friction can also be achieved with strings with a round cross-section if the overall diameter of the strings is reduced.
  • the strings should be made of a particularly tensile material, possibly with a friction-reducing coating.
  • the strings for example the string 22 are extended beyond the frame surface into the handle 10. Between points C and D in FIG. 1, the string 22 is guided essentially without contact, so that the entire length A-B can participate in the elastic stretching of the string 22 when a ball hits it.
  • Fig. 3 is an enlarged view of the slider 18 already shown in Fig. 1.
  • the slider 18 has a number of bores 26 lying one above the other in the longitudinal direction, which allow the strings to be passed through at different heights.
  • FIG. 4 which shows a further side view of the slider 18, two adjacent bores are shown in the lower area, which allow the accommodation of two different strings at the same height. Otherwise, a threaded bore 44 for receiving the clamping bolt 20 is indicated in the lower region of FIGS. 3 and 4.
  • Fig. 5 shows another embodiment of a slider, which in this case is designated 18 '.
  • a slider instead of the bores 26 according to FIGS. 3 and 4, undercut recesses 26 'are provided in this case on the two opposite strings, which allow the individual strings to be suspended at any height.
  • a threaded bore 44 in turn serves to receive a clamping bolt, not shown.
  • the slider can also be made of elastic material, such as rubber or elastic plastic that it has a certain spring and damping effect and can absorb shock losses. Since a deformation in the longitudinal direction of the slider from bottom to top in FIGS. 3 to 5 is added, this effect is particularly evident in the upper region of the sliders shown. This can be used specifically.
  • FIG. 6 shows a schematic cross section through the frame 12.
  • the frame consists of two box profiles 46, 48 connected by a web.
  • the web for receiving a roller 50 is interrupted.
  • the reel is spherical in the example shown and has a circumferential groove 52 for guiding a string, not shown.
  • the roller 50 is rotatably arranged on an axle pin 54, which is inserted into opposite bores of the box profiles 46, 48, which are not described in more detail.
  • a corresponding bore 56 is provided on the upper side of the box section 46 in FIG. 6 for inserting the axle pin.
  • 7 is a side view of the frame 12 and shows the web 58 and circular recesses 51 for the rollers 50.
  • FIG. 8 shows a partial section through the web 58, not shown in FIG. 6, and in a view of one of the box profiles, which is designated by 60 in FIG. 8.
  • An insert 64 made of slidable material is inserted into a bore 62 of the web 58 and has a bead-shaped rounding 68 in the region of the deflection of a string 66, which allows the string 66 to slide largely without friction.
  • Such a solution results in a similarly low-friction connection between the string section 70 lying within the frame and the string section 72 lying outside the frame.
  • Fig. 9 shows a similar deflection of a string 66.
  • An insert designated 74 engages again in the bore 62, but instead of the rounding 68 has a foldable in the direction of the arrow, rounded at its free end support 76, which when pulled in the direction of Inside the frame surface, i.e. upwards in Fig. 9 by folding the movement of the string 66 practically no resistance, in the rest position shown in Fig. 9, however, is held by a stop 78, so that the string is retracted only by overcoming a certain amount of friction can be. This ensures that the string 66 yields slightly when a ball hits the string, but does not spring back with the same speed and ease, so that the ball springs back only with a certain loss of impact.
  • FIGS. 10 and 11 A further embodiment of the deflection is illustrated in FIGS. 10 and 11.
  • the deflection is located in the vicinity of the lower apex of the frame 12, so that the string section extends freely from the frame to the slider 18.
  • the string 66 extends through a bore 100 of the support 76, which can be pivoted about an axis pin 102 in a region delimited by the web 58 and an inclined surface 104 of the support.
  • the friction increases considerably when the support 76 is pivoted by a pull on the string section 70 into the position shown in FIG. 10.
  • a string 80 according to FIG. 12 can also be moved back and forth several times in the hollow handle via rollers 82, 84 on the bottom plate 14 and in the area of the frame 12 be brought here.

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  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Physical Education & Sports Medicine (AREA)
  • Golf Clubs (AREA)
  • Mechanical Sealing (AREA)
  • Toys (AREA)

Claims (13)

1. Raquette de tennis ou de squash comportant un cadre (12) sensiblement elliptique, un manche (10) relié à ce cadre et un cordage (16) monté à l'intérieur du cadre (12) et constitué par des cordes (22 et 24) entrecroisées et qui comporte au moins une corde repliée au niveau du cadre selon un coude de renvoi à faible frottement, tendue de façon multiple sur le cadre et comportant des brins sensiblement parallèles, caractérisée en ce que les brins de corde (22c, qui sont directement voisins, appartiennent à des cordes (22, 24) différentes, et que la distance entre les brins de corde (22a, 22b) parallèles, qui appartiennent à la même corde (par exemple 22) est égale au moins approximativement au rayon d'une balle.
2. Raquette selon la revendication 1, caractérisée en ce que le coude de renvoi à faible frottement des cordes est réalise à l'aide de galets (28-40,50).
3. Raquette selon la revendication 2, caractérisée en ce que les galets (50) possèdent une forme sphérique.
4. Raquette selon 1 une des revendications 1 à 3, caractérisée en ce que les cordes entrecroisées (70,70') s'étendent librement à proximité les unes des autres dans des plans différents et sont reliées entre elles au niveau des points de croisement par des organes de liaison (110), qui logent les cordes de manière qu'elles puissent se déplacer en glissant.
5. Raquette selon l'une des revendications 1 à 3, caractérisée en ce que les cordes possèdent une section transversale aplatie de telle sorte que leurs dimensions dans le plan E de la surface du cadre sont plus importantes que perpendiculairement à ce plan et que les cordes comprennent au moins un coeur constitué en un matériau résistant à la traction et une gaine constituée en un matériau réduisant le frottement. 6. Raquette selon l'une des revendications 1 à 5, caractérisée en ce que les cordes (22,24) se prolongent au moins partiellement au-delà de la surface du cadre et que les brins de corde (72), qui s'étendent au-delà de la surface du cadre, sont reliés aux brins (22b, 22c, 70) des cordes, qui sont situées dans la surface du cadre, par l'intermédiaire d'un renvoi (32,34,68,76) à faible frottement.
7. Raquette selon la revendication 6, caractérisée en ce que les brins (72) des cordes, qui s'étendent au-delà de la surface du cadre, sont introduits dans le manche creux (10).
8. Raquette selon la revendication 7, caractérisée en ce que les brins (72) des cordes, qui s'étendent au-delà de la surface du cadre, sont guidés le long de la surface du cadre (12) dans le manche (10).
9. Raquette selon l'une des revendications 6 à 8, caractérisée en ce que le coude de renvoi des cordes est réalisé par l'intermédiaire de freins à friction (76) à action unidirectionnelle, qui permettent un déplacement des cordes en direction de l'intérieur de la surface du cadre et réalisent au contraire un freinage dans le sens inverse.
10. Raquette selon l'une des revendications 7 à 9, caractérisée en ce que les cordes sont fixées dans le manche (10) sur un dispositif de mise en tension (18,20) déplaçable longitudinalement dans le manche.
11. Raquette selon la revendication 10, caractérisée en ce que le dispositif de mise en tension comporte un organe coulissant allongé (18) déplaçable longitudinalement dans le manche et qui, afin de réaliser une modification de la longueur des brins (72) des cordes, qui s'étendent au-delà du cadre (12), dans différentes positions longitudinales permet de réaliser la fixation, ou le coude de renvoi des cordes.
12. Raquette selon la revendication 11, caractérisée en ce que l'organe coulissant (18) est constitué en un matériau élastique et/ou est fixé élastiquement.
13. Raquette selon l'une des revendications 1 à 12, caractérisée en ce que les cordes sont tendues en diagonale par rapport à l'axe longitudinal de la raquette.
EP83900929A 1982-03-30 1983-03-29 Raquette de tennis ou de squash Expired EP0106850B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT83900929T ATE20575T1 (de) 1982-03-30 1983-03-29 Tennis- oder squash-schlaeger.

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE19823211738 DE3211738A1 (de) 1982-03-30 1982-03-30 Tennisschlaeger
DE3211738 1982-03-30
DE8221340 1982-07-27
DE8221340U 1982-07-27

Publications (2)

Publication Number Publication Date
EP0106850A1 EP0106850A1 (fr) 1984-05-02
EP0106850B1 true EP0106850B1 (fr) 1986-07-02

Family

ID=25800787

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83900929A Expired EP0106850B1 (fr) 1982-03-30 1983-03-29 Raquette de tennis ou de squash

Country Status (6)

Country Link
US (2) US4595201A (fr)
EP (1) EP0106850B1 (fr)
JP (1) JPS59500628A (fr)
DE (1) DE3364342D1 (fr)
DK (1) DK157530C (fr)
WO (1) WO1983003358A1 (fr)

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FR2687324A1 (fr) * 1992-02-14 1993-08-20 Siguier Max Raquette munie d'un cordage telle qu'une raquette et tennis.
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US6811502B1 (en) * 2003-04-30 2004-11-02 Wilson Sporting Goods Co. Racquet with elongated peripheral main string segments and enlarged sweet spot
US20060211526A1 (en) * 2003-05-12 2006-09-21 Hauptman Madeline M Convertible racket for multiple stringing configurations
WO2006017267A2 (fr) * 2004-07-12 2006-02-16 Squarehit Sports, Inc. Dispositif et procede d'entrainement a la frappe de coups au tennis
US6955618B1 (en) * 2004-07-22 2005-10-18 Mitchell Herman R Adjustable tension stringed racquet
US20060293127A1 (en) * 2005-06-22 2006-12-28 William Riesser Racket and method of stringing the racket
US20070149327A1 (en) * 2005-12-27 2007-06-28 Varan Cyrus O X-braced tennis racket
EP1857154A1 (fr) * 2006-05-15 2007-11-21 Adolf Brunner Appareil de mesure du cordage d'une raquette de jeu de balle
US9089743B2 (en) 2012-07-24 2015-07-28 Wilson Sporting Goods Co. Racquet configured with fewer cross strings than main strings
US9504882B2 (en) * 2015-04-27 2016-11-29 Gregory Mark Adamczak Interactive tennis racket with split head, flexible spherical joints and strings tension mechanism
US11161017B1 (en) * 2020-04-09 2021-11-02 Cyrus O. Varan Racket with discontinuous frame

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Also Published As

Publication number Publication date
US4595201A (en) 1986-06-17
DK157530B (da) 1990-01-22
JPS59500628A (ja) 1984-04-12
DK157530C (da) 1990-06-05
EP0106850A1 (fr) 1984-05-02
DK545683A (da) 1983-11-29
US4754968A (en) 1988-07-05
WO1983003358A1 (fr) 1983-10-13
JPH05589B2 (fr) 1993-01-06
DE3364342D1 (en) 1986-08-07
DK545683D0 (da) 1983-11-29

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