FR2803766A1 - Racket frame, rope guiding eye, and badminton racket including such devices - Google Patents

Racket frame, rope guiding eye, and badminton racket including such devices Download PDF

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Publication number
FR2803766A1
FR2803766A1 FR0000485A FR0000485A FR2803766A1 FR 2803766 A1 FR2803766 A1 FR 2803766A1 FR 0000485 A FR0000485 A FR 0000485A FR 0000485 A FR0000485 A FR 0000485A FR 2803766 A1 FR2803766 A1 FR 2803766A1
Authority
FR
France
Prior art keywords
frame
rope
characterized
orifices
width
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.)
Granted
Application number
FR0000485A
Other languages
French (fr)
Other versions
FR2803766B1 (en
Inventor
Pierre Yves Arroyo
Marc Poggi
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.)
Babolat VS
Original Assignee
Babolat VS
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 Babolat VS filed Critical Babolat VS
Priority to FR0000485A priority Critical patent/FR2803766B1/en
Publication of FR2803766A1 publication Critical patent/FR2803766A1/en
Application granted granted Critical
Publication of FR2803766B1 publication Critical patent/FR2803766B1/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • AHUMAN NECESSITIES
    • A63SPORTS; GAMES; AMUSEMENTS
    • A63BAPPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B49/00Stringed rackets, e.g. for tennis
    • A63B49/02Frames
    • A63B49/022String guides on frames, e.g. grommets
    • AHUMAN NECESSITIES
    • A63SPORTS; GAMES; AMUSEMENTS
    • A63BAPPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B2102/00Application 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
    • A63B2102/04Badminton
    • AHUMAN NECESSITIES
    • A63SPORTS; GAMES; AMUSEMENTS
    • A63BAPPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B51/00Stringing tennis, badminton or like rackets; Strings therefor; Maintenance of racket strings

Abstract

<P> This frame (2) of badminton racket (1) comprises orifices (5) for passage of a rope intended to form the sieve of the racket, these orifices (5) being equipped with eyelets (7) of guiding the rope while at least one hollow area is formed on the outer side (2a) of said frame for receiving this rope (8) passing through two of the orifices (5). The receiving area (z) has, over most of its length, a first width less than the maximum diameter (d2) of the eyelets (7) and, at the orifices (5), a second width greater than this diameter (d2). This zone (z) allows efficient reception of the rope without significantly reducing the rigidity of the frame (2). The eyelets (7) have a flared head (7b) allowing surface support on the flared inlet zones (5a) of the orifices (5). </P>

Description

The invention relates to a badminton racket frame, a grommet

  guide for a rope on such a frame and to a badminton racket comprising such a frame and / or such an eyelet. As shown in Figures 7 and 8 which are respectively a perspective view and a section along the

  line VIII-VIII in Figure 7 of a classic racket frame

  that, it is known to form, on the outside of the frame 102 of a badminton racket and opposite to its handle, a longitudinal groove 106 for receiving and protecting a rope forming the screen of this racket. This groove prevents the rope from being exposed, in particular in the event of impacts or friction of the frame against an obstacle or against the ground. The bottom of this groove is pierced with orifices 105 passing through the frame, each of these orifices being intended to be equipped with an eyelet for guiding the rope. The width of this groove is greater than or equal to the width of the orifices equipped with eyelets, that is to say in practice much greater than the diameter of the cord. This has major drawbacks: First, the wider the groove 106, the more the frame 102 is mechanically weakened by the constitution of this groove, which can affect the rigidity of the sieve of the racket. In addition, the geometry of the known eyelets and their housings is such that the cord is stretched between two eyelets without contact with the frame, which

  increases the risk of rope breakage.

  It is to these drawbacks that the invention more particularly intends to remedy by proposing a badminton racket frame whose rigidity is not reduced by the creation of a zone for receiving the rope forming the sieve and which

  allows effective maintenance of this rope in this area.

  In this spirit, the invention relates to a badminton racket frame comprising holes for the passage of a rope intended to form the sieve of the racket, these holes being equipped with eyelets for guiding the rope while at least one hollow area is formed on the outside of the frame for the reception of this cord passing through two of these orifices, characterized in that the aforementioned area has, over most of its length, a first width less than the maximum diameter of the eyelets and, at

  these orifices, a second width greater than this diameter.

  Thanks to the invention, the geometry of the area for receiving the rope on the outside of the frame is optimized with respect to its function in that it allows effective longitudinal maintenance of the rope while protecting it from impact. or abrasion wear, while the rigidity of the frame is not appreciably affected by the formation of this zone over most of its length. At the orifices, this zone is widened to allow the reception of the eyelets, this widening taking place on a

  small part of the reception area, which prevents problems

blir the frame.

  According to advantageous but not compulsory aspects of

  the invention, the framework incorporates one or more of the characteristics

  following dimensions: - Each reception zone comprises an elongated part of width equal to the first width and two end parts of this first part, the end parts each forming a reception zone of a part

from one of the eyelets.

  - The recessed area has, at the orifices, a flared section, in particular generally frustoconical. In this case, provision can be made for the maximum diameter of the generally frustoconical section to be equal to the second width. This geometry of the reception area allows a transmission

  effective effort between each eyelet and the corresponding part

  laying of the hollow area, without shearing or deformation

notable eyelet.

  - The first width is substantially equal or

  slightly larger than the nominal diameter of the rope.

  - The recessed area has, over most of its length, a V or U-shaped cross section. - The rope is pressed against the bottom of the recessed area in its first width portion, when it is stretched in eyelets housed in orifices in this area. In other words, the eyelets connect to the first width area, so that the rope is supported by this area, which avoids premature breakage of the rope which sometimes occurs when it is tense

  between eyelets at a distance from the frame.

  - It includes several discrete areas for receiving the rope, these areas being separated two by two by a

  section of the frame devoid of cord receiving areas.

  This aspect of the invention takes advantage of the fact that the areas of passage of the rope outside the frame can be predetermined before the screen is formed and that certain parts of the outside of the frame are not intended to receive a part of the rope. It is therefore possible not to leave a hollow area on these parts, in particular in the section of the frame opposite the handle, which makes it possible to keep a generally rounded section, adapted in terms of rigidity, between the areas of the frame. receipt of

the rope.

  The invention also relates to a guide eyelet

  a racket rope comprising a frame as above-

  ment described and, more specifically, an eyelet comprising a tubular part capable of being introduced into an orifice of the

  frame of the racket and a head forming a stop for the introduction

  tion of this eyelet in this orifice, characterized in that this head has a flared outer shape, capable of coming into surface support on the edge of this orifice, on the outer side

of the frame.

  The flared shape of the eyelet allows it to be effective-

  ment held in position by cooperation of shapes with the inlet area of the orifice while the surface support guarantees an effective transfer of forces, without significant deformation of the head of the eyelet. We can in particular provide that this head is generally frustoconical, with an angle at the apex between 70 and 90, preferably of

around 800.

  The invention finally relates to a badminton racket which comprises a frame as previously described and / or at least one eyelet as previously described. Such a racket is more rigid than those of the prior art while effectively protecting the rope against the risks of cutting, especially in the event of impacts or friction

against an obstacle.

  The invention will be better understood and other advantages thereof will appear more clearly in the light of the

  description which follows of an embodiment of a

  racket according to the invention, given only by way of example and with reference to the accompanying drawings in which: - Figure 1 is a perspective view of a racket frame according to the invention with two guide eyelets in implementation course; - Figure 2 is a longitudinal section of the front part of the frame of Figure 1; - Figure 3 is a section along line III-III in Figure 2; - Figure 4 is a section along the line IV-IV of Figure 2; - Figure 5 is a section along line V-V in Figure 2 and - Figure 6 is a longitudinal section in principle, on a larger scale than Figure 2, of the frame of

  Figures 1 to 5 fitted with a sieve rope.

  The racket 1 shown in the figures comprises a frame 2, a rod 3 and a handle 4 for handling. The frame 2 is hollow and pierced with orifices 5 joining its outer side 2a and its inner side 2b. The frame 2 is made of composite material, such as a structure with carbon fiber reinforcement and an epoxy matrix. He could also

be metallic.

  On the outer side 2a, the orifices 5 have a flared shape. More specifically, the entry zone 5a of each orifice 5 has a generally frustoconical shape converging in

  direction of the interior of the frame 2.

  The orifices 5 are connected by a groove 6 having a cross section in the shape of an open V or U. We denote 11 the width of each groove 6. We denote by 12 the width of each entry area 5a, which in fact corresponds to its maximum diameter. In the part of the frame 2 opposite the rod 3, the orifices 5 are not all connected by a groove 6. More specifically, certain zones 2c of the frame 2 are devoid of grooves 6 on their respective outer sides because, there is no no provision is made for a rope to be placed at zone 2c

  when placing the racket sieve.

  Thus, there is formed, at the periphery of the frame 2 and opposite the rod 3, a succession of discrete zones z for receiving a rope forming the screen of the racket, each zone z being formed of two zones d '' inlet 5a of ports 5 and

a throat 6.

  Eyelets 7 are provided to be placed in each orifice 5, as shown by the arrows F1 in FIG. 1, in order to guide a cord 8 forming the screen of the

  racket, as shown in figure 6.

  The eyelets 7 are made of plastic and include a tubular rod 7a, intended to pass through a

  orifice 5, and a head 7b of flared external shape corresponding to

  corresponding to the shape of the entry zones 5a. As can be seen more particularly in FIG. 6, the heads 7b of the eyelets 7 are generally frustoconical and their angle at the top a is of the order of 80. Satisfactory results

  can be obtained with an angle OE between 70 and 90.

  The angle at the top of the entry zones 5a is substantially

equal to the angle a.

  Taking into account the respective geometry of the zones Sa and of the heads 7b, a surface contact is created between the orifices 5 and the eyelets 7, which allows an effective transmission of forces represented by the arrows F2 in FIG. 6, without risk. deformation or shearing of the head

7b with an eyelet 7.

  As appears more clearly from FIG. 6, the flared geometry of the zones 5a and the positioning of the groove 6 adjacent to each zone 5a allow the rope 8 stretched in the groove 6 between the eyelets 7 to rest against the bottom 6a of the groove 6, so that the rope is supported in the groove 6, which limits the risk of breakage

premature rope 8.

  According to an advantageous aspect of the invention, the width l1 is chosen equal to or slightly greater than the nominal diameter

  d1 of chord 8, so that chord 8 is effective-

  ment guided transversely in each groove 6 when it

is stretched between holes 5.

  We note d2 the maximum diameter of the head 7b of each eyelet 7, this diameter d2 being less than or equal to the width 12 to allow the establishment of the eyelets 7 in the

zones 5a of the orifices 5.

  The width l is less than or equal to the diameter _2 of the eyelet received in an orifice 5 adjoining the groove 6, which corresponds to the fact that each groove 6 has a width optimized for receiving a cord 8 while affecting as little as possible the

overall stiffness of the frame 2.

  The section of the groove 6, as it appears in FIG. 3, is that of an open U or V. The edges of this groove may be more or less open, these edges possibly being generally rectilinear, convex or concave, depending on the choice of design within the reach of those skilled in the art. Taking into account that the zones z do not appreciably affect the rigidity of the frame 2, such zones can be provided over the entire periphery of the frame 2, with

  with the exception of its connection area with the rod 3.

  As emerges from the lateral parts of the racket shown in FIGS. 1 and 2, certain zones z can be contiguous, in the sense that there is no part of the frame devoid of groove 6 between these zones, certain orifices 5 being common to two such adjacent z zones. It can also be provided that all the zones z are joined two by two, in the sense that there are no equivalent parts

to the parts 2c represented.

  According to a variant not shown of the invention, the zones z can be limited to the front part of the frame 2, that is to say the part opposite to the rod 3, because it is in this part that the cord 8 is the most exposed to shocks or

friction with obstacles.

  The eyelets 7 have been shown as identical.

  However, some eyelets 7 may have a section suitable for the passage of several strands of rope. In this case, their maximum diameter d2 is greater and the geometry of the zones 5a is adapted, in particular the width 12.

Claims (11)

  1. Badminton racket frame (2) (1) comprising orifices (5) for the passage of a rope (8) intended to form the
  sieve of the racket, said holes being equipped with eye-
  lets (7) for guiding said rope while at least one hollow area is formed on the outer side (2a) of said frame for receiving said rope passing through two of said orifices, characterized in that said area (z, 5a, 6) has, over most of its length, a first width (l1) less than the maximum diameter (d2) of said eyelets and,
  at said orifices (5), a second width (12) greater than
less than said diameter.
  2. Frame according to claim 1, characterized in that each receiving zone (z) comprises at least one elongated part (6) of width equal to the first width (l1) and at least two end parts (5a) of said first part, said end parts each forming a zone of
  reception of one of the parts (7b) of one of said eyelets (7).
  3. Frame according to one of the preceding claims,
  characterized in that said zone (z) has, at the level of said orifices (5), a flared section (Sa), in particular
generally frustoconical.
  4. Frame according to claim 3, characterized in that the maximum diameter (12) of said section overall
  frustoconical is equal to said second width.
  5. Frame according to one of the preceding claims,
  characterized in that said first width (l1) is substantially equal to or slightly greater than the diameter
nominal (dl) of said rope (8).
  6. Frame according to one of the preceding claims,
  characterized in that said zone (z) has, over most of its length (6), a cross section in the form of a V or a U.
  7. Frame according to one of the preceding claims,
  characterized in that said rope (8) bears against the bottom (6a) of said zone (z) in its portion (6) of first width, when it is stretched between eyelets (7) housed
  in orifices (5) in said zone.
  8. Frame according to one of the preceding claims,
  characterized in that it comprises several discrete zones (z) for receiving said rope (8), said zones being separated in pairs by a section (2c) of said frame (2)
  devoid of reception area (z) of said rope (8).
  9. Eyelet (7) for guiding a badminton racket rope (8) (1), said eyelet comprising a tubular part (7a) capable of being introduced into an orifice (5) of the frame.
  said racket and a head (7b) forming a stop for the introduction
  tion of said eyelet in said orifice, characterized in that said head has a flared outer shape, capable of coming into surface support on the edge (5a) of said orifice, on the side
outside (2a) of said frame.
  10. Eyelet according to claim 9, characterized in that said head (7b) is generally frustoconical, with an angle at the apex (a) between 70 and 90, preferably of
around 800.
  11. Badminton racket (1), characterized in that it
  comprises a frame (2) according to one of claims 1 to 8
  and / or at least one eyelet (7) according to one of claims
9 or 10.
FR0000485A 2000-01-14 2000-01-14 Racquet frame, rope guiding rope, and badminton racquet comprising such devices Expired - Fee Related FR2803766B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR0000485A FR2803766B1 (en) 2000-01-14 2000-01-14 Racquet frame, rope guiding rope, and badminton racquet comprising such devices

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
FR0000485A FR2803766B1 (en) 2000-01-14 2000-01-14 Racquet frame, rope guiding rope, and badminton racquet comprising such devices
EP01420006A EP1116502B1 (en) 2000-01-14 2001-01-12 Racket frame and tennis racket encompassing such a frame
DE60110650A DE60110650D1 (en) 2000-01-14 2001-01-12 Rackets and badminton rackets with such a frame
AT01420006T AT295206T (en) 2000-01-14 2001-01-12 Rack and badminton bat with such frame

Publications (2)

Publication Number Publication Date
FR2803766A1 true FR2803766A1 (en) 2001-07-20
FR2803766B1 FR2803766B1 (en) 2002-04-05

Family

ID=8845939

Family Applications (1)

Application Number Title Priority Date Filing Date
FR0000485A Expired - Fee Related FR2803766B1 (en) 2000-01-14 2000-01-14 Racquet frame, rope guiding rope, and badminton racquet comprising such devices

Country Status (4)

Country Link
EP (1) EP1116502B1 (en)
AT (1) AT295206T (en)
DE (1) DE60110650D1 (en)
FR (1) FR2803766B1 (en)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2171223A (en) * 1937-12-02 1939-08-29 Roy H Robinson Racket for tennis and batting games and method of manufacturing same
FR1498455A (en) * 1966-07-19 1967-10-20 Carlton Tyre Saving Co Ltd racket frame
US3568290A (en) * 1966-06-13 1971-03-09 Dunlop Co Ltd Method of making rackets having metal frames
FR2399259A1 (en) * 1977-08-02 1979-03-02 Guyot Michel Expanded polyurethane skins for tennis racquet heads - for radiused stringing holes and channels without needing eyelets
DE9216243U1 (en) * 1992-01-29 1993-03-11 Franz Voelkl Gmbh & Co Ski Und Tennis Sportartikelfabrik Kg, 8440 Straubing, De

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5944624A (en) * 1996-12-23 1999-08-31 Prince Sports Group, Inc. Notched, slotted grommet for sports racquet

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2171223A (en) * 1937-12-02 1939-08-29 Roy H Robinson Racket for tennis and batting games and method of manufacturing same
US3568290A (en) * 1966-06-13 1971-03-09 Dunlop Co Ltd Method of making rackets having metal frames
FR1498455A (en) * 1966-07-19 1967-10-20 Carlton Tyre Saving Co Ltd racket frame
FR2399259A1 (en) * 1977-08-02 1979-03-02 Guyot Michel Expanded polyurethane skins for tennis racquet heads - for radiused stringing holes and channels without needing eyelets
DE9216243U1 (en) * 1992-01-29 1993-03-11 Franz Voelkl Gmbh & Co Ski Und Tennis Sportartikelfabrik Kg, 8440 Straubing, De

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None

Also Published As

Publication number Publication date
EP1116502A1 (en) 2001-07-18
EP1116502B1 (en) 2005-05-11
AT295206T (en) 2005-05-15
FR2803766B1 (en) 2002-04-05
DE60110650D1 (en) 2005-06-16

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Effective date: 20070930