EP2881150A1 - Table-tennis bat comprising a reinforcement - Google Patents

Table-tennis bat comprising a reinforcement Download PDF

Info

Publication number
EP2881150A1
EP2881150A1 EP14195931.2A EP14195931A EP2881150A1 EP 2881150 A1 EP2881150 A1 EP 2881150A1 EP 14195931 A EP14195931 A EP 14195931A EP 2881150 A1 EP2881150 A1 EP 2881150A1
Authority
EP
European Patent Office
Prior art keywords
reinforcement
racket
pallet
orifice
racket according
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.)
Withdrawn
Application number
EP14195931.2A
Other languages
German (de)
French (fr)
Inventor
Nicolas Havard
Cédric Corre
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.)
Cornilleau SAS
Original Assignee
Cornilleau SAS
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 Cornilleau SAS filed Critical Cornilleau SAS
Publication of EP2881150A1 publication Critical patent/EP2881150A1/en
Withdrawn legal-status Critical Current

Links

Images

Classifications

    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B59/00—Bats, rackets, or the like, not covered by groups A63B49/00 - A63B57/00
    • A63B59/40—Rackets or the like with flat striking surfaces for hitting a ball in the air, e.g. for table tennis
    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B60/00—Details or accessories of golf clubs, bats, rackets or the like
    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B60/00—Details or accessories of golf clubs, bats, rackets or the like
    • A63B60/06—Handles
    • A63B60/08—Handles characterised by the material
    • 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
    • A63B60/50—Details or accessories of golf clubs, bats, rackets or the like with through-holes
    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B2102/00—Application of clubs, bats, rackets or the like to the sporting activity ; particular sports involving the use of balls and clubs, bats, rackets, or the like
    • A63B2102/16—Table tennis

Definitions

  • the invention relates to a table tennis racket comprising a reinforcement.
  • a table tennis racket comprising along a longitudinal axis, a handle, and comprising a pallet and a junction zone between the handle and the pallet.
  • Said junction zone comprises an orifice passing through the junction zone throughout its thickness.
  • the orifice must have a precisely shaped section with relatively small dimensions and must be placed at a particular point in the junction area to maintain the snug resistance and stiffness of the snowshoe.
  • An object of the invention is to provide a table tennis racket that is resistant and relatively light.
  • a table tennis racket comprising, along a longitudinal axis, a handle, and comprising a pallet and a junction zone between the handle and the pallet, said junction zone comprising an orifice. crossing the junction zone throughout its thickness.
  • the junction zone comprises a reinforcement extending through the orifice from the handle to the pallet, the reinforcement having at least one rib extending in a longitudinal direction of the reinforcement.
  • the reinforcement comprising the rib
  • said reinforcement and said rib allow the racket to retain sufficient strength and stiffness even if the orifice is relatively large.
  • the orifice is therefore much simpler to arrange in the junction zone.
  • the reinforcement can have small dimensions without affecting the resistance of the racket. This prevents the reinforcement does not deteriorate the aesthetic appearance of the racket.
  • the reinforcement is sized so that the racket has a Young's modulus between 1900 and 2000 kilopascal.
  • the reinforcement is then dimensioned so that the racket has a Young's modulus between 1940 and 1950 kilopascals.
  • the table tennis racket comprises a handle 1 extending along a longitudinal axis X.
  • the racket further comprises a pallet 2.
  • the pallet 2 has a first main face 2a and a second main face 2b opposite the first, the two main faces defining the playing surfaces of the racket.
  • the pallet 2 has a peripheral edge 3 connecting the two main faces.
  • the pallet comprises a plurality of blind recesses 4 (of which only one is numbered here) which are formed between the two main faces and which open on the peripheral edge 3 of the pallet 2. These recesses 4 make it possible to lighten the racket without drastically reduce the resistance of the racket.
  • the racket further comprises a junction zone 5 between the handle 1 and the pallet 2 which here has a thickness identical to that of the pallet 2.
  • the junction zone 5 has an orifice 6 passing through the junction zone 5 throughout its thickness.
  • the orifice 6 has a roughly elliptical section, the section being defined by a cutting plane parallel to the main faces of the pallet 2.
  • the orifice 6 is formed in the junction zone 5 so that a diameter 7 of the section roughly elliptical is inclined relative to the longitudinal axis X that is to say is neither parallel nor perpendicular to the longitudinal axis X.
  • the junction zone comprises a reinforcement 8 extending through the orifice 6 from the handle 1 to the pallet 2.
  • the reinforcement 8 extends into the orifice 6 so as to separate the orifice into two openings 12, 13 of different sections (said sections also being defined by a cutting plane parallel to the main faces of the pallet 2).
  • the reinforcement 8 and the orifice 6 are here shaped so that the section of each of the openings 12, 13 has an area between 1 and 15% of the area of one of the main faces of the pallet 2.
  • the section of one of the openings 12 has an area of substantially 3% of that of the first main face 2a and the section of the other of the openings 13 has an area of substantially 2% of that of the first main face 2a.
  • the reinforcement 8 is arranged so that a longitudinal direction Y of the reinforcement 8 is inclined relative to the longitudinal axis X of the racket and to the diameter 7 of the orifice 6.
  • inclined is meant of course that the longitudinal direction Y is neither perpendicular nor parallel to the diameter 7 and to the longitudinal axis X.
  • the reinforcement 8 comprises two first identical ribs 9 which both extend in the longitudinal direction Y of the reinforcement 8.
  • the first ribs 9 extend over only a portion of the reinforcement 8.
  • the ratio of the length L n of each first rib 9 over the length L r of the reinforcement 8 is here approximately 70%, the lengths of the reinforcement 8 and first ribs 9 being the dimensions said reinforcement 8 and said first ribs 9 in the longitudinal direction Y.
  • the first ribs 9 are here arranged on a first main face 11a of the reinforcement 8 so as to each form a flange of said first main face 11a of the reinforcement 8.
  • the reinforcement further comprises two second ribs 10 identical to each other and which both extend in the longitudinal direction Y of the reinforcement 8.
  • the second ribs 10 are here arranged on a second main face 11b of the reinforcement 8, opposed to the first main face 11a of the reinforcement 8, so as to each form a flange of said second main face of the reinforcement 8.
  • the second ribs 10 extend over only a portion of the reinforcement 8 so that each second rib 10 extends respectively under one of the first ribs 9.
  • Each second rib 10 is here identical and of the same length as the first rib 9 in which said second rib 10 extends.
  • the ratio of the length L n of each second rib 10 to the length L r of the reinforcement 8 is here about 70%, the lengths of the reinforcement 8 and the second ribs 10 being the dimensions of said reinforcement 8 and said second ribs 10 the longitudinal direction Y.
  • the reinforcement 8 has a section substantially in H, the section being defined by a transverse sectional plane having for normal the longitudinal direction Y (as more visible at the figure 3 ).
  • the ratio of the width l n of each rib to the width l r of the reinforcement 8 is substantially 30%, the widths of the reinforcement 8 and ribs being the dimensions of said reinforcement and said ribs in a second direction which is transverse to the longitudinal direction Y and which belongs to the same plane as said longitudinal direction Y, said plane being parallel to the main faces of the pallet 2.
  • the ratio of the thickness in each rib to the thickness e r of the reinforcement 8 is substantially 135%.
  • the reinforcement 8, the first ribs 9 and the second ribs 10 are shaped so that the sum of the thickness of the reinforcement 8, a first rib 9 and a second rib 10 is substantially equal to the thickness of the rib. junction area 5 and pallet 2.
  • the reinforcement 8 thus has two identical main faces and is symmetrical in the longitudinal direction Y.
  • the reinforcement 8 and the orifice 6 are shaped so that the area of the section of the reinforcement 8 according to said cutting plane is between 10 and 50% of the area of the section of the orifice 6 along said section plane.
  • said section of the reinforcement 8 has an area of substantially 25% of that of the orifice 6.
  • the unitary assembly formed by the pallet 2, the junction zone 5, the handle 1 and the reinforcement 8 with the ribs 9 is molded of plastics material.
  • the plastic is polyamide filled with 30% glass fibers.
  • the inventors have thus been able to develop a racket according to the invention as described above having the following characteristics: Thickness of the pallet (in millimeters) Mass (in grams) Young's modulus (in kilopascal) Breaking force (in Newton) Elongation at break (in millimeters) 5, 9 111.1 1943 279 58.1
  • the values of breaking force and elongation at break are determined according to a test for measuring the resistance implemented using the device illustrated in FIG. figure 6 .
  • the device comprises a first fulcrum 101 on the racket at the end of the pallet 2 and a second fulcrum 102 on the racket substantially at 10 millimeters from the end of the handle 1 which is connected to the junction zone 5. A force is then applied to the racket 5 millimeters from the free end of the handle 1.
  • the racket according to the invention is thus of a relatively small mass thanks in particular to the recesses 4, the orifice 6 and the material of the unitary assembly.
  • the racket also has sufficient strength under normal conditions of use, despite the presence of the orifice 6, thanks to the reinforcement 8 and the ribs 9.
  • the reinforcement may be different from what has been described and in particular may have any other shape than that described.
  • the reinforcement comprises four ribs
  • the reinforcement may comprise a different number of ribs and comprise for example a single rib extending preferably in the center of one of the main faces of the reinforcement according to the longitudinal direction.
  • the reinforcement may comprise one or more ribs only on one of its main faces.
  • the reinforcement may thus have a section, defined by a sectional plane having normal for the longitudinal direction of the reinforcement, different from that in H described as for example a T-section or U or cross.
  • the reinforcement may have a thickness different from that indicated.
  • the ribs may have a shape different from that described and include for example a longitudinal portion and a curved portion. Two ribs of the same main face of the reinforcement can thus meet at their curved parts.
  • a "rib” will therefore designate a protruding portion of the rest of one of the main faces of the reinforcement and that said portion has significant dimensions as in the embodiment described or smaller dimensions so as to form a simple protruding tongue. It will therefore be understood that, within the meaning of the invention, a groove formed in one of the faces of the reinforcement defines two broad but slightly protruding ribs on either side of the groove, the reinforcement thus comprising two ribs.
  • the dimensions of the rib relative to those of the reinforcement may be different from those indicated.
  • the rib may have a length of between 30% and 100% of the length of the reinforcement [the length being the dimension in the longitudinal direction Y].
  • the rib may have a width of between 10% and 50% of the width of the reinforcement [the width being the dimension in a second direction which is transverse to the longitudinal direction and which belongs to the same plane as said longitudinal direction, which plane is parallel to the main faces of the pallet].
  • the rib may have a thickness of between 75% and 175% of the thickness of the reinforcement.
  • the dimensions of the openings section relative to those of the pallet may also be different from those indicated.
  • the dimensions of the section of the reinforcement relative to those of the orifice may also be different from those indicated.

Abstract

L'invention concerne une raquette de tennis de table comportant selon un axe longitudinal (X), un manche (1), et comprenant une palette (2) et une zone de jonction (5) entre le manche et la palette, ladite zone de jonction comportant un orifice (6) traversant la zone de jonction dans toute son épaisseur. Selon l'invention, la zone de jonction comporte un renfort (8) s'étendant à travers l'orifice depuis le manche jusqu'à la palette, le renfort comportant au moins une nervure (9) s'étendant selon la direction longitudinale (Y).The invention relates to a table tennis racket comprising, along a longitudinal axis (X), a handle (1), and comprising a pallet (2) and a junction zone (5) between the handle and the pallet, said zone of junction having an orifice (6) passing through the junction zone throughout its thickness. According to the invention, the junction zone comprises a reinforcement (8) extending through the orifice from the handle to the pallet, the reinforcement comprising at least one rib (9) extending in the longitudinal direction ( Y).

Description

L'invention concerne une raquette de tennis de table comportant un renfort.The invention relates to a table tennis racket comprising a reinforcement.

ARRIERE PLAN TECHNOLOGIQUE DE L'INVENTIONBACKGROUND OF THE INVENTION

Pour le grand public, il est connu des raquettes de tennis de table moulées en plastique. De telles raquettes sont en effet bien plus résistantes que les raquettes traditionnelles qui sont à base de bois.For the general public, plastic table tennis rackets are known. Such snowshoes are indeed much more resistant than traditional rackets that are based on wood.

Toutefois ces raquettes présentent l'inconvénient d'être particulièrement lourdes.However, these rackets have the disadvantage of being particularly heavy.

Il a ainsi été envisagé de fabriquer une raquette de tennis de table comportant selon un axe longitudinal, un manche, et comprenant une palette et une zone de jonction entre le manche et la palette. Ladite zone de jonction comporte un orifice traversant la zone de jonction dans toute son épaisseur.It has thus been envisaged to manufacture a table tennis racket comprising along a longitudinal axis, a handle, and comprising a pallet and a junction zone between the handle and the pallet. Said junction zone comprises an orifice passing through the junction zone throughout its thickness.

Toutefois, l'orifice doit présenter une section de forme précise avec des dimensions relativement faibles et doit être placé à un endroit particulier de la zone de jonction pour permettre de conserver une résistance et une raideur importantes de la raquette.However, the orifice must have a precisely shaped section with relatively small dimensions and must be placed at a particular point in the junction area to maintain the snug resistance and stiffness of the snowshoe.

Ainsi, même si l'orifice permet un léger allégement de la raquette, il s'avère très contraignant de ménager l'orifice dans la raquette.Thus, even if the orifice allows a slight lightening of the racket, it is very restrictive to spare the hole in the racket.

OBJET DE L'INVENTIONOBJECT OF THE INVENTION

Un but de l'invention est de proposer une raquette de tennis de table qui soit résistante et relativement légère.An object of the invention is to provide a table tennis racket that is resistant and relatively light.

BREVE DESCRIPTION DE L'INVENTIONBRIEF DESCRIPTION OF THE INVENTION

En vue de la réalisation de ce but, on propose une raquette de tennis de table comportant, selon un axe longitudinal, un manche, et comprenant une palette et une zone de jonction entre le manche et la palette, ladite zone de jonction comportant un orifice traversant la zone de jonction dans toute son épaisseur.In view of achieving this goal, there is provided a table tennis racket comprising, along a longitudinal axis, a handle, and comprising a pallet and a junction zone between the handle and the pallet, said junction zone comprising an orifice. crossing the junction zone throughout its thickness.

Selon l'invention, la zone de jonction comporte un renfort s'étendant à travers l'orifice depuis le manche jusqu'à la palette, le renfort comportant au moins une nervure s'étendant selon une direction longitudinale du renfort.According to the invention, the junction zone comprises a reinforcement extending through the orifice from the handle to the pallet, the reinforcement having at least one rib extending in a longitudinal direction of the reinforcement.

Ainsi, grâce à la présence du renfort comprenant la nervure, il est possible d'avoir une plus grande liberté en ce qui concerne les dimensions et la forme de la section de l'orifice et en ce qui concerne le positionnement de l'orifice dans la zone de jonction. En effet, ledit renfort et ladite nervure permettent à la raquette de conserver une résistance et une raideur suffisantes même si l'orifice est de dimensions relativement importantes.Thus, thanks to the presence of the reinforcement comprising the rib, it is possible to have a greater freedom as regards the dimensions and the shape of the section of the orifice and as regards the positioning of the orifice in the junction area. Indeed, said reinforcement and said rib allow the racket to retain sufficient strength and stiffness even if the orifice is relatively large.

L'orifice s'avère donc bien plus simple à ménager dans la zone de jonction.The orifice is therefore much simpler to arrange in the junction zone.

En outre, grâce à la présence de la nervure qui rigidifie le renfort, le renfort peut avoir des dimensions peu importantes sans que cela nuise à la résistance de la raquette. Ceci permet d'éviter que le renfort ne vienne détériorer l'aspect esthétique de la raquette.In addition, thanks to the presence of the rib that stiffens the reinforcement, the reinforcement can have small dimensions without affecting the resistance of the racket. This prevents the reinforcement does not deteriorate the aesthetic appearance of the racket.

Selon un mode de réalisation particulier, le renfort est dimensionné de sorte que la raquette ait un module de Young compris entre 1900 et 2000 kilopascal.According to a particular embodiment, the reinforcement is sized so that the racket has a Young's modulus between 1900 and 2000 kilopascal.

De préférence, le renfort est alors dimensionné de sorte que la raquette ait un module de Young compris entre 1940 et 1950 kilopascal.Preferably, the reinforcement is then dimensioned so that the racket has a Young's modulus between 1940 and 1950 kilopascals.

BREVE DESCRIPTION DES DESSINSBRIEF DESCRIPTION OF THE DRAWINGS

L'invention sera mieux comprise à la lumière de la description qui suit de modes de réalisation particuliers, non limitatifs de l'invention.The invention will be better understood in the light of the following description of particular, non-limiting embodiments of the invention.

Il sera fait référence aux figures ci-jointes, parmi lesquelles :

  • la figure 1 est une vue de face d'une raquette selon l'invention,
  • la figure 2 est une vue agrandie d'une partie de la raquette illustrée à la figure 1,
  • la figure 3 est une vue de côté de la raquette illustrée à la figure 1,
  • la figure 4 est une vue en coupe transversale de la raquette illustrée à la figure 1,
  • la figure 5 est une vue agrandie d'une partie de la coupe transversale de la raquette illustrée à la figure 4,
  • la figure 6 est un schéma illustrant un dispositif de mesure de la résistance de la raquette illustrée à la figure 1.
Reference will be made to the attached figures, among which:
  • the figure 1 is a front view of a racket according to the invention,
  • the figure 2 is an enlarged view of part of the snowshoe shown at figure 1 ,
  • the figure 3 is a side view of the snowshoe illustrated in the figure 1 ,
  • the figure 4 is a cross sectional view of the snowshoe illustrated in the figure 1 ,
  • the figure 5 is an enlarged view of part of the cross-section of the snowshoe illustrated at figure 4 ,
  • the figure 6 is a diagram illustrating a device for measuring the resistance of the racket illustrated in FIG. figure 1 .

DESCRIPTION DETAILLEE DE L'INVENTIONDETAILED DESCRIPTION OF THE INVENTION

En référence aux figures 1 à 5, la raquette de tennis de table selon l'invention comporte un manche 1 s'étendant selon un axe longitudinal X.With reference to Figures 1 to 5 , the table tennis racket according to the invention comprises a handle 1 extending along a longitudinal axis X.

La raquette comporte en outre une palette 2. La palette 2 comporte une première face principale 2a et une deuxième face principale 2b opposée à la première, les deux faces principales définissant les surfaces de jeu de la raquette. La palette 2 comporte un bord périphérique 3 reliant les deux faces principales. De préférence, comme plus visible à la figure 2, la palette comporte une pluralité d'évidements borgnes 4 (dont un seul est numéroté ici) qui sont ménagés entre les deux faces principales et qui débouchent sur le bord périphérique 3 de la palette 2. Ces évidements 4 permettent d'alléger la raquette sans diminuer drastiquement la résistance de la raquette.The racket further comprises a pallet 2. The pallet 2 has a first main face 2a and a second main face 2b opposite the first, the two main faces defining the playing surfaces of the racket. The pallet 2 has a peripheral edge 3 connecting the two main faces. Preferably, as more visible to the figure 2 , the pallet comprises a plurality of blind recesses 4 (of which only one is numbered here) which are formed between the two main faces and which open on the peripheral edge 3 of the pallet 2. These recesses 4 make it possible to lighten the racket without drastically reduce the resistance of the racket.

La raquette comporte en outre une zone de jonction 5 entre le manche 1 et la palette 2 qui a ici une épaisseur identique à celle de la palette 2. La zone de jonction 5 comporte un orifice 6 traversant la zone de jonction 5 dans toute son épaisseur. Selon un mode de réalisation particulier, l'orifice 6 a une section grossièrement elliptique, la section étant définie par un plan de coupe parallèle aux faces principales de la palette 2. De préférence, l'orifice 6 est ménagé dans la zone de jonction 5 de sorte qu'un diamètre 7 de la section grossièrement elliptique soit incliné relativement à l'axe longitudinal X c'est-à-dire ne soit ni parallèle ni perpendiculaire à l'axe longitudinal X.The racket further comprises a junction zone 5 between the handle 1 and the pallet 2 which here has a thickness identical to that of the pallet 2. The junction zone 5 has an orifice 6 passing through the junction zone 5 throughout its thickness. . According to a particular embodiment, the orifice 6 has a roughly elliptical section, the section being defined by a cutting plane parallel to the main faces of the pallet 2. Preferably, the orifice 6 is formed in the junction zone 5 so that a diameter 7 of the section roughly elliptical is inclined relative to the longitudinal axis X that is to say is neither parallel nor perpendicular to the longitudinal axis X.

Selon l'invention, la zone de jonction comporte un renfort 8 s'étendant à travers l'orifice 6 depuis le manche 1 jusqu'à la palette 2.According to the invention, the junction zone comprises a reinforcement 8 extending through the orifice 6 from the handle 1 to the pallet 2.

Selon un mode de réalisation particulier, le renfort 8 s'étend dans l'orifice 6 de sorte à séparer l'orifice en deux ouvertures 12, 13 de sections différentes (lesdites sections étant également définies par un plan de coupe parallèle aux faces principales de la palette 2). Le renfort 8 et l'orifice 6 sont ici conformés de sorte que la section de chacune des ouvertures 12, 13 ait une aire comprise entre 1 et 15% de l'aire d'une des faces principales de la palette 2. Par exemple la section d'une des ouvertures 12 a une aire de sensiblement 3% de celle de la première face principale 2a et la section de l'autre des ouvertures 13 a une aire de sensiblement 2% de celle de la première face principale 2a.According to a particular embodiment, the reinforcement 8 extends into the orifice 6 so as to separate the orifice into two openings 12, 13 of different sections (said sections also being defined by a cutting plane parallel to the main faces of the pallet 2). The reinforcement 8 and the orifice 6 are here shaped so that the section of each of the openings 12, 13 has an area between 1 and 15% of the area of one of the main faces of the pallet 2. For example the section of one of the openings 12 has an area of substantially 3% of that of the first main face 2a and the section of the other of the openings 13 has an area of substantially 2% of that of the first main face 2a.

De préférence, le renfort 8 est agencé de sorte qu'une direction longitudinale Y du renfort 8 soit inclinée relativement à l'axe longitudinal X de la raquette et au diamètre 7 de l'orifice 6. Par "incliné" on entend bien entendu que la direction longitudinale Y n'est ni perpendiculaire ni parallèle au diamètre 7 et à l'axe longitudinal X.Preferably, the reinforcement 8 is arranged so that a longitudinal direction Y of the reinforcement 8 is inclined relative to the longitudinal axis X of the racket and to the diameter 7 of the orifice 6. By "inclined" is meant of course that the longitudinal direction Y is neither perpendicular nor parallel to the diameter 7 and to the longitudinal axis X.

Toujours selon l'invention, le renfort 8 comporte deux premières nervures 9 identiques entre elles qui s'étendent toutes deux selon la direction longitudinale Y du renfort 8.Still according to the invention, the reinforcement 8 comprises two first identical ribs 9 which both extend in the longitudinal direction Y of the reinforcement 8.

De préférence, les premières nervures 9 s'étendent sur une partie seulement du renfort 8. Le ratio de la longueur Ln de chaque première nervure 9 sur la longueur Lr du renfort 8 est ici de sensiblement 70%, les longueurs du renfort 8 et des premières nervures 9 étant les dimensions dudit renfort 8 et desdites premières nervures 9 suivant la direction longitudinale Y.Preferably, the first ribs 9 extend over only a portion of the reinforcement 8. The ratio of the length L n of each first rib 9 over the length L r of the reinforcement 8 is here approximately 70%, the lengths of the reinforcement 8 and first ribs 9 being the dimensions said reinforcement 8 and said first ribs 9 in the longitudinal direction Y.

Les premières nervures 9 sont ici agencées sur une première face principale 11a du renfort 8 de sorte à former chacune un rebord de ladite première face principale 11a du renfort 8.The first ribs 9 are here arranged on a first main face 11a of the reinforcement 8 so as to each form a flange of said first main face 11a of the reinforcement 8.

Selon un mode de réalisation particulier, le renfort comporte en outre deux deuxièmes nervures 10 identiques entre elles et qui s'étendent toutes deux selon la direction longitudinale Y du renfort 8. Les deuxièmes nervures 10 sont ici agencées sur une deuxième face principale 11b du renfort 8, opposée à la première face principale 11a du renfort 8, de sorte à former chacune un rebord de ladite deuxième face principale du renfort 8.According to a particular embodiment, the reinforcement further comprises two second ribs 10 identical to each other and which both extend in the longitudinal direction Y of the reinforcement 8. The second ribs 10 are here arranged on a second main face 11b of the reinforcement 8, opposed to the first main face 11a of the reinforcement 8, so as to each form a flange of said second main face of the reinforcement 8.

De préférence, les deuxièmes nervures 10 s'étendent sur une partie seulement du renfort 8 de sorte que chaque deuxième nervure 10 s'étende respectivement sous l'une des premières nervures 9. Chaque deuxième nervure 10 est ici identique et de même longueur que la première nervure 9 sous laquelle ladite deuxième nervure 10 s'étend. Le ratio de la longueur Ln de chaque deuxième nervure 10 sur la longueur Lr du renfort 8 est donc ici de sensiblement 70%, les longueurs du renfort 8 et des deuxièmes nervures 10 étant les dimensions dudit renfort 8 et desdites deuxièmes nervures 10 suivant la direction longitudinale Y.Preferably, the second ribs 10 extend over only a portion of the reinforcement 8 so that each second rib 10 extends respectively under one of the first ribs 9. Each second rib 10 is here identical and of the same length as the first rib 9 in which said second rib 10 extends. The ratio of the length L n of each second rib 10 to the length L r of the reinforcement 8 is here about 70%, the lengths of the reinforcement 8 and the second ribs 10 being the dimensions of said reinforcement 8 and said second ribs 10 the longitudinal direction Y.

De la sorte pour la portion du renfort 8 comprenant les premières nervures 9 et les deuxièmes nervures 10, le renfort 8 a une section sensiblement en H, la section étant définie par un plan de coupe transversal ayant pour normale la direction longitudinale Y (comme plus visible à la figure 3).In this way for the portion of the reinforcement 8 comprising the first ribs 9 and the second ribs 10, the reinforcement 8 has a section substantially in H, the section being defined by a transverse sectional plane having for normal the longitudinal direction Y (as more visible at the figure 3 ).

Selon un mode de réalisation particulier, pour chacune des premières nervures 9 et des deuxièmes nervures 10, le ratio de la largeur ln de chaque nervure sur la largeur lr du renfort 8 est de sensiblement 30%, les largeurs du renfort 8 et des nervures étant les dimensions dudit renfort et desdites nervures suivant une deuxième direction qui est transversale à la direction longitudinale Y et qui appartient au même plan que ladite direction longitudinale Y, ledit plan étant parallèle aux faces principales de la palette 2.According to a particular embodiment, for each of the first ribs 9 and second ribs 10, the ratio of the width l n of each rib to the width l r of the reinforcement 8 is substantially 30%, the widths of the reinforcement 8 and ribs being the dimensions of said reinforcement and said ribs in a second direction which is transverse to the longitudinal direction Y and which belongs to the same plane as said longitudinal direction Y, said plane being parallel to the main faces of the pallet 2.

Selon un mode de réalisation particulier, pour chacune des premières nervures 9 et des deuxièmes nervures 10, le ratio de l'épaisseur en de chaque nervure sur l'épaisseur er du renfort 8 est de sensiblement 135%.According to a particular embodiment, for each of the first ribs 9 and the second ribs 10, the ratio of the thickness in each rib to the thickness e r of the reinforcement 8 is substantially 135%.

Le renfort 8, les premières nervures 9 et les deuxièmes nervures 10 sont conformés de sorte que la somme de l'épaisseur du renfort 8, d'une première nervure 9 et d'une deuxième nervure 10 soit sensiblement égale à l'épaisseur de la zone de jonction 5 et de la palette 2.The reinforcement 8, the first ribs 9 and the second ribs 10 are shaped so that the sum of the thickness of the reinforcement 8, a first rib 9 and a second rib 10 is substantially equal to the thickness of the rib. junction area 5 and pallet 2.

Le renfort 8 présente ainsi deux faces principales identiques et est symétrique selon la direction longitudinale Y.The reinforcement 8 thus has two identical main faces and is symmetrical in the longitudinal direction Y.

Selon un mode de réalisation préféré, selon un plan de coupe parallèle aux deux faces principales de la palette 2 qui s'étend au centre de la palette 2, le renfort 8 et l'orifice 6 sont conformés de sorte que l'aire de la section du renfort 8 selon ledit plan de coupe soit compris entre 10 et 50% de l'aire de la section de l'orifice 6 selon ledit plan de coupe. Par exemple ladite section du renfort 8 a une aire de sensiblement 25% de celle de l'orifice 6.According to a preferred embodiment, according to a cutting plane parallel to the two main faces of the pallet 2 which extends in the center of the pallet 2, the reinforcement 8 and the orifice 6 are shaped so that the area of the section of the reinforcement 8 according to said cutting plane is between 10 and 50% of the area of the section of the orifice 6 along said section plane. For example, said section of the reinforcement 8 has an area of substantially 25% of that of the orifice 6.

Selon un mode de réalisation particulier, l'ensemble unitaire formé par la palette 2, la zone de jonction 5, le manche 1 et le renfort 8 avec les nervures 9 est moulé en matière plastique. De préférence, la matière plastique est du polyamide chargé à 30% de fibres de verre.According to a particular embodiment, the unitary assembly formed by the pallet 2, the junction zone 5, the handle 1 and the reinforcement 8 with the ribs 9 is molded of plastics material. Preferably, the plastic is polyamide filled with 30% glass fibers.

Les inventeurs ont ainsi pu mettre au point une raquette selon l'invention telle que décrite ci-dessus présentant les caractéristiques suivantes : Epaisseur de la palette (en millimètre) Masse (en gramme) Module de Young (en kilopascal) Force à rupture (en Newton) Allongement à rupture (en millimètre) 5, 9 111,1 1943 279 58,1 The inventors have thus been able to develop a racket according to the invention as described above having the following characteristics: Thickness of the pallet (in millimeters) Mass (in grams) Young's modulus (in kilopascal) Breaking force (in Newton) Elongation at break (in millimeters) 5, 9 111.1 1943 279 58.1

Les valeurs de force à rupture et d'allongement à rupture sont déterminées selon un test de mesure de la résistance mis en oeuvre à l'aide du dispositif illustré à la figure 6. Le dispositif comporte un premier point d'appui 101 sur la raquette au niveau de l'extrémité de la palette 2 et un deuxième point d'appui 102 sur la raquette sensiblement à 10 millimètres de l'extrémité du manche 1 qui est liée à la zone de jonction 5. Une force est ensuite appliquée sur la raquette à 5 millimètres de l'extrémité libre du manche 1.The values of breaking force and elongation at break are determined according to a test for measuring the resistance implemented using the device illustrated in FIG. figure 6 . The device comprises a first fulcrum 101 on the racket at the end of the pallet 2 and a second fulcrum 102 on the racket substantially at 10 millimeters from the end of the handle 1 which is connected to the junction zone 5. A force is then applied to the racket 5 millimeters from the free end of the handle 1.

La raquette selon l'invention s'avère ainsi d'une masse relativement peu importante grâce notamment aux évidements 4, à l'orifice 6 et au matériau de l'ensemble unitaire. La raquette présente en outre une résistance suffisante en condition normale d'utilisation, malgré la présence de l'orifice 6, grâce au renfort 8 et aux nervures 9.The racket according to the invention is thus of a relatively small mass thanks in particular to the recesses 4, the orifice 6 and the material of the unitary assembly. The racket also has sufficient strength under normal conditions of use, despite the presence of the orifice 6, thanks to the reinforcement 8 and the ribs 9.

Bien entendu l'invention n'est pas limitée au mode de réalisation décrit et on peut y apporter des variantes de réalisation sans sortir du cadre de l'invention tel que défini par les revendications.Naturally, the invention is not limited to the embodiment described and alternative embodiments can be made without departing from the scope of the invention as defined by the claims.

En particulier, le renfort pourra être différent de ce qui a été décrit et en particulier pourra avoir une toute autre forme que celle décrite. Ainsi, bien qu'ici le renfort comporte quatre nervures, le renfort pourra comporter un nombre différent de nervures et comporter par exemple une seule nervure s'étendant de préférence au centre de l'une des faces principales du renfort selon la direction longitudinale. Le renfort pourra comporter une ou des nervures seulement sur l'une de ses faces principales. Le renfort pourra ainsi avoir une section, définie par un plan de coupe ayant pour normale la direction longitudinale du renfort, différente de celle en H décrite comme par exemple une section en T ou encore en U ou en croix. Le renfort pourra avoir une épaisseur différente de celle indiquée. Bien entendu, les nervures pourront avoir une forme différente de celle décrite et comprendre par exemple une partie longitudinale et une partie courbe. Deux nervures d'une même face principale du renfort pourront ainsi se rejoindre au niveau de leurs parties courbes.In particular, the reinforcement may be different from what has been described and in particular may have any other shape than that described. Thus, although here the reinforcement comprises four ribs, the reinforcement may comprise a different number of ribs and comprise for example a single rib extending preferably in the center of one of the main faces of the reinforcement according to the longitudinal direction. The reinforcement may comprise one or more ribs only on one of its main faces. The reinforcement may thus have a section, defined by a sectional plane having normal for the longitudinal direction of the reinforcement, different from that in H described as for example a T-section or U or cross. The reinforcement may have a thickness different from that indicated. Of course, the ribs may have a shape different from that described and include for example a longitudinal portion and a curved portion. Two ribs of the same main face of the reinforcement can thus meet at their curved parts.

Pour la présente demande une « nervure » désignera donc une partie saillante du reste d'une des faces principales du renfort et ce que ladite partie présente des dimensions importantes comme dans le mode de réalisation décrit ou des dimensions moins importantes de sorte à former une simple languette saillante. On comprendra donc qu'au sens de l'invention une rainure ménagée dans l'une des faces du renfort définit deux nervures larges mais peu saillantes de part et d'autre de la rainure, le renfort comportant ainsi deux nervures.For the present application a "rib" will therefore designate a protruding portion of the rest of one of the main faces of the reinforcement and that said portion has significant dimensions as in the embodiment described or smaller dimensions so as to form a simple protruding tongue. It will therefore be understood that, within the meaning of the invention, a groove formed in one of the faces of the reinforcement defines two broad but slightly protruding ribs on either side of the groove, the reinforcement thus comprising two ribs.

Les dimensions de la nervure relativement à celles du renfort pourront être différentes de celles indiquées. La nervure pourra avoir une longueur comprise entre 30% et 100% de la longueur du renfort [la longueur étant la dimension selon la direction longitudinale Y]. La nervure pourra avoir une largeur comprise entre 10% et 50% de la largeur du renfort [la largeur étant la dimension selon une deuxième direction qui est transversale à la direction longitudinale et qui appartient au même plan que ladite direction longitudinale, plan qui est parallèle aux faces principales de la palette]. La nervure pourra avoir une épaisseur comprise entre 75% et 175% de l'épaisseur du renfort.The dimensions of the rib relative to those of the reinforcement may be different from those indicated. The rib may have a length of between 30% and 100% of the length of the reinforcement [the length being the dimension in the longitudinal direction Y]. The rib may have a width of between 10% and 50% of the width of the reinforcement [the width being the dimension in a second direction which is transverse to the longitudinal direction and which belongs to the same plane as said longitudinal direction, which plane is parallel to the main faces of the pallet]. The rib may have a thickness of between 75% and 175% of the thickness of the reinforcement.

Bien entendu, les intervalles donnés ci-dessus ne sont pas limitatifs.Of course, the intervals given above are not limiting.

Les dimensions de la section des ouvertures relativement à celles de la palette pourront également être différentes de celles indiquées.The dimensions of the openings section relative to those of the pallet may also be different from those indicated.

Les dimensions de la section du renfort relativement à celles de l'orifice pourront également être différentes de celles indiquées.The dimensions of the section of the reinforcement relative to those of the orifice may also be different from those indicated.

Claims (15)

Raquette de tennis de table comportant selon un axe longitudinal (X), un manche (1), et comprenant une palette (2) et une zone de jonction (5) entre le manche et la palette, ladite zone de jonction comportant un orifice (6) traversant la zone de jonction dans toute son épaisseur, la raquette étant caractérisée en ce que la zone de jonction comporte un renfort (8) s'étendant à travers l'orifice depuis le manche jusqu'à la palette, le renfort comportant au moins une nervure (9 ; 10) s'étendant selon une direction longitudinale (Y) du renfort.Table tennis racket comprising along a longitudinal axis (X), a handle (1), and comprising a pallet (2) and a junction zone (5) between the handle and the pallet, said junction zone including an orifice ( 6) crossing the junction zone throughout its thickness, the racket being characterized in that the junction zone comprises a reinforcement (8) extending through the orifice from the handle to the pallet, the reinforcement comprising at least one rib (9; 10) extending in a longitudinal direction (Y) of the reinforcement. Raquette selon la revendication 1, dans laquelle le renfort (8) est agencé de sorte que la direction longitudinale (Y) du renfort soit inclinée relativement à l'axe longitudinal (X) de la raquette.Racket according to claim 1, wherein the reinforcement (8) is arranged so that the longitudinal direction (Y) of the reinforcement is inclined relative to the longitudinal axis (X) of the racket. Raquette selon la revendication 1, dans laquelle le renfort (8) comporte deux nervures (9 ; 10) espacées l'une de l'autre.Racket according to claim 1, wherein the reinforcement (8) has two ribs (9; 10) spaced from each other. Raquette selon la revendication 3, dans laquelle les deux nervures (9 ; 10) s'étendent sur une même face du renfort (8).Racket according to claim 3, in which the two ribs (9; 10) extend on the same face of the reinforcement (8). Raquette selon la revendication 3, dans laquelle les deux nervures (9 ; 10) s'étendent chacune au niveau des extrémités de la face du renfort (8) de sorte à former chacune un rebord de ladite face.Racket according to claim 3, wherein the two ribs (9; 10) each extend at the ends of the face of the reinforcement (8) so as to each form a flange of said face. Raquette selon la revendication 1, dans laquelle le renfort (8) a une section sensiblement en H, ladite section étant définie par un plan de coupe ayant pour normale la direction longitudinale (Y).Racket according to claim 1, wherein the reinforcement (8) has a section substantially H, said section being defined by a sectional plane having normal longitudinal direction (Y). Raquette selon la revendication 1, dans laquelle le renfort (8) s'étend dans l'orifice (6) de sorte à séparer l'orifice en deux ouvertures (12 ; 13) de sections différentes ladite section étant définie par un plan de coupe parallèle aux faces principales de la palette (2).Racket according to claim 1, wherein the reinforcement (8) extends in the orifice (6) so as to separate the orifice into two openings (12; 13) of different sections, said section being defined by a cutting plane parallel to the main faces of the pallet (2). Raquette selon la revendication 7, dans laquelle la section de chacune des ouvertures (12 ; 13) a une aire comprise entre 1 et 15% de l'aire d'une desdites faces principales de la palette (2).Racket according to claim 7, wherein the section of each of the openings (12; 13) has an area of between 1 and 15% of the area of one of said main faces of the pallet (2). Raquette selon la revendication 1, dans laquelle le renfort (8) est dimensionné de sorte que la raquette ait un module de Young compris entre 1900 et 2000 kilopascal.Racket according to claim 1, wherein the reinforcement (8) is dimensioned so that the racket has a Young's modulus between 1900 and 2000 kilopascals. Raquette selon la revendication 9, dans laquelle le renfort (8) est dimensionné de sorte que la raquette ait un module de Young compris entre 1940 et 1950 kilopascal.Racket according to claim 9, wherein the reinforcement (8) is dimensioned so that the racket has a Young's modulus between 1940 and 1950 kilopascals. Raquette selon la revendication 1, dans laquelle la nervure (9 ; 10) a une longueur comprise entre 30% et 100% de la longueur du renfort (8).Racket according to claim 1, wherein the rib (9; 10) has a length of between 30% and 100% of the length of the reinforcement (8). Raquette selon la revendication 1, dans laquelle la nervure (9 ; 10) a une largeur comprise entre 10% et 50% de la largeur du renfort (8).Racket according to claim 1, wherein the rib (9; 10) has a width of between 10% and 50% of the width of the reinforcement (8). Raquette selon la revendication 1, dans laquelle la nervure (9 ; 10) a une épaisseur comprise entre 75% et 175% de l'épaisseur du renfort (8).Racket according to claim 1, wherein the rib (9; 10) has a thickness of between 75% and 175% of the thickness of the reinforcement (8). Raquette selon la revendication 1, dans laquelle une section du renfort (8) a une aire comprise entre 10 et 50% de l'aire d'une section de l'orifice (6), lesdites sections étant définies par un plan de coupe parallèle aux faces principales de la palette (2).Racket according to claim 1, wherein a section of the reinforcement (8) has an area between 10 and 50% of the area of a section of the orifice (6), said sections being defined by a parallel cutting plane to the main faces of the pallet (2). Raquette selon la revendication 1, dans laquelle la palette (2), le manche (1), la zone de jonction (5), le renfort (8) et la nervure (9 ; 10) sont en matériau polyamide chargé à 30% de fibres de verre.Racket according to claim 1, in which the paddle (2), the handle (1), the junction zone (5), the reinforcement (8) and the rib (9; 10) are made of polyamide material loaded with 30% of glass fibers.
EP14195931.2A 2013-12-06 2014-12-02 Table-tennis bat comprising a reinforcement Withdrawn EP2881150A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR1362273A FR3014323B1 (en) 2013-12-06 2013-12-06 TABLE TENNIS RACKET COMPRISING A REINFORCEMENT

Publications (1)

Publication Number Publication Date
EP2881150A1 true EP2881150A1 (en) 2015-06-10

Family

ID=50179777

Family Applications (1)

Application Number Title Priority Date Filing Date
EP14195931.2A Withdrawn EP2881150A1 (en) 2013-12-06 2014-12-02 Table-tennis bat comprising a reinforcement

Country Status (2)

Country Link
EP (1) EP2881150A1 (en)
FR (1) FR3014323B1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105457246A (en) * 2016-02-04 2016-04-06 鲍金龙 Table tennis racket
CN106492428A (en) * 2016-11-28 2017-03-15 渭南师范学院 A kind of table tennis bat of having electronic monitoring function

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3674268A (en) * 1970-06-04 1972-07-04 Kenneth S Shellman Sr Table tennis paddle construction with improved handle means therefor

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3674268A (en) * 1970-06-04 1972-07-04 Kenneth S Shellman Sr Table tennis paddle construction with improved handle means therefor

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105457246A (en) * 2016-02-04 2016-04-06 鲍金龙 Table tennis racket
CN105457246B (en) * 2016-02-04 2018-12-07 鲍金龙 table tennis bat
CN106492428A (en) * 2016-11-28 2017-03-15 渭南师范学院 A kind of table tennis bat of having electronic monitoring function

Also Published As

Publication number Publication date
FR3014323A1 (en) 2015-06-12
FR3014323B1 (en) 2017-02-24

Similar Documents

Publication Publication Date Title
WO1993000968A1 (en) Golf club head
EP1842442A1 (en) Sole for cross-country ski boots comprising improved means of fixing a binding and boot equipped with such a sole
FR2693378A1 (en) Improvement for "iron" type golf club head.
WO1993019817A1 (en) Golf club head consisting of a hollow plastic body and a metal sealing element
FR3064186A1 (en) RACKET OF PADEL
FR2906153A1 (en) SLIDING BOARD FOR SNOW
EP1790395B1 (en) snowboard, skateboard or surfboard
EP2881150A1 (en) Table-tennis bat comprising a reinforcement
EP0855201B1 (en) Snowboard
FR2527461A1 (en) MULTI-LAYER SKI WITH SANDWICH BUILDING
EP0995468A1 (en) Frame for in-line skate with anti-torque bar
FR2942141A1 (en) TENNIS RACKET INCLUDING AMORTIZATION MEANS
FR2615401A1 (en) RACKET HAVING IMPROVED COLLAR
FR3057295A1 (en) DAWN COMPRISING A PLATFORM AND A BLADE ASSEMBLED
FR2495477A1 (en) Frame for tennis racquet - has space between inner and outer partitions filled with vibration absorbing material
EP1908501A1 (en) Snowboard or skateboard comprising a special tip
EP2889062A1 (en) Table-tennis bat
EP3677324A1 (en) Connection element for a construction set, associated nozzle and construction set
FR2934960A3 (en) Hollow racket for paddle tennis, has surface layers securely mounted on annular edges of shoulder for defining hollow zone between surface layers and shoulder, and core connected to shoulder, where handle is connected to core
EP1196660A1 (en) Road safety device, component parts and method for making same
EP1200678A1 (en) Crash barrier for highway or the like comprising wooden fibre-reinforced rails
EP3651661A1 (en) Element for producing a vascular clip and vascular clip produced in this way
EP2602008B1 (en) Board for snow gliding
EP2213339B1 (en) Ski including a vibration damping system
EP1496763A2 (en) Shoe bottom

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 20141202

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

AX Request for extension of the european patent

Extension state: BA ME

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 20151211