EP1418990A1 - Raquette pour jeux de balles demontable et amortissement et son procede de fabrication - Google Patents
Raquette pour jeux de balles demontable et amortissement et son procede de fabricationInfo
- Publication number
- EP1418990A1 EP1418990A1 EP02755504A EP02755504A EP1418990A1 EP 1418990 A1 EP1418990 A1 EP 1418990A1 EP 02755504 A EP02755504 A EP 02755504A EP 02755504 A EP02755504 A EP 02755504A EP 1418990 A1 EP1418990 A1 EP 1418990A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- handle
- joining
- racket
- lateral
- frame
- 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- Withdrawn
Links
Classifications
-
- A—HUMAN NECESSITIES
- A63—SPORTS; GAMES; AMUSEMENTS
- A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
- A63B49/00—Stringed rackets, e.g. for tennis
- A63B49/02—Frames
- A63B49/08—Frames with special construction of the handle
-
- 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
- A63B49/035—Frames with easily dismountable parts, e.g. heads, shafts or grips
-
- 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
- A63B60/54—Details or accessories of golf clubs, bats, rackets or the like with means for damping vibrations
-
- A—HUMAN NECESSITIES
- A63—SPORTS; GAMES; AMUSEMENTS
- A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
- A63B2210/00—Space saving
- A63B2210/50—Size reducing arrangements for stowing or transport
Definitions
- the present invention relates to a removable racket for ball games and its manufacturing process.
- rackets are known for foldable and / or removable ball games. These rackets generally comprise a screen frame, a handle and a hinge which has the general shape of a pivot pin in Omega and which makes it possible to fold the handle against the screen frame. These rackets can be dismantled in the sense that the handle and the sieve frame can be separated either by means of a removable hinge according to document US 4,746,119, or by means of a removable fixing device according to document US 5,322,278.
- Folding and / or dismantling the racket makes it possible to reduce its size and therefore to facilitate its storage and transport. Compared to simple folding, dismantling also allows you to exchange either the sieve frame or the handle in order to adapt each of them according to the game and / or player.
- the interesting features offered by foldable and / or removable rackets use hinge or fixing mechanisms and related locking mechanisms to block the sieve frame and the handle in coplanar alignment in the playing position. which are made up of many different parts. These complex mechanisms complicate the structure of the sieve frame and the handle and therefore their assembly. In addition, these mechanisms are generally part integral with the sieve frame and / or the handle at the level of which they create multiple zones of weakness.
- the playing comfort is based on the quality of the grip of the handle, on the maneuverability of the racket and on its capacity to absorb high frequency vibrations likely to generate problems in muscle and tendon tissue.
- An object of the invention is to provide a removable racket for ball games whose assembly and disassembly are easy, improved performance and playing precision.
- a removable racket for ball games comprises a screen frame and a handle, the screen frame comprising a screen frame part and a joining part making it possible to join between said part. sieve frame and said handle, said joining part including two lateral joining arms and a stiffening bridge interconnecting and stiffening the lateral joining arms, the stiffening bridge disposed in an intermediate position between the screen frame part and the free end of the lateral joining arms.
- the easy assembly and disassembly as well as the improved performance are obtained by increasing the structural integrity of the screen frame, and in particular of the junction part of the latter with the handle.
- the junction part of the sieve frame may include a central junction arm arranged between the lateral junction arms and comprising means for fixing a fixing rod mounted in the handle.
- this central connecting arm makes it possible to distance the point of attachment outside the part of the frame supporting the rope so as not to interfere with the rope or weaken this part of the frame.
- the stiffening bridge can comprise two parts of the stiffening arm fixed near a free end of the central joining arm on one side and on the other side at an intermediate point along the joining arms. lateral, between their point of attachment to the screen frame part and their free end intended to be assembled against the handle.
- the stiffening bridge, the lateral joining arms, the central joining arm and the screen frame part can be formed in one piece, for example by molding, of plastic or epoxy resin around long fibers or a metal alloy such as a titanium or aluminum alloy.
- the handle can be made by the same process and in the same material as the screen frame or in another material, and can be made by another manufacturing process, such as plastic injection. This makes it possible to optimize the manufacturing processes and the choice of materials taking into account the different functionalities of the handle and the sieve frame.
- the junction part between the screen frame and the handle can be formed integrally with the screen frame but outside of it and at the level of which the damping and stabilization functions are grouped together, while increasing the structural integrity and rigidity of the sieve frame and the handle and therefore improving the performance of the racket.
- This structure also makes it possible to reduce the structural fragility of the racket.
- the vibration absorbing means may include a central vibration absorber and two lateral vibration absorbers.
- the central vibration absorber is mounted on the racket handle shell or on the central junction arm of the frame and the two lateral vibration absorbers are respectively mounted on two lateral junction arms of the screen frame.
- the lateral joining arms of the joining part can be in one piece with the stiffening arms. This characteristic makes it possible to increase the stability and the rigidity of the racket.
- the two lateral stiffening arms can be of slightly curved shape. This curved shape allows a certain flexibility of the lateral joining arms and thus reduces the risk of rupture at the point of attachment between these parts.
- the handle can be easily disassembled and separated from the screen frame, the vibration absorbing means adapted on the handle shell or on the central connecting arm and on the lateral connecting arms can be exchanged quickly and easily.
- This characteristic makes it possible to instantly adapt the absorption capacity of the vibrations of the racket according to the game and / or the player.
- the central stabilization arm comprises a thread in which is screwed a thread formed on one end of a metal rod housed in a longitudinal housing of the handle.
- the two lateral vibration absorbers may have a slightly conical shape or an equivalent shape intended to be received in housings of the junction part of the handle having a slightly flared and hollowed shape.
- the central fixing screw can be provided with an elastic sleeve fitted on the rod, and when it is compressed inside the handle, it elastically deforms laterally and comes into contact with the shell of the handle, which increases the rigidity of the assembly.
- a method of manufacturing a removable racket for ball games includes the steps of manufacturing a screen frame comprising a frame part for supporting the rope and a joining part comprising a bridge stiffening extending between lateral joining arms, in one piece by molding plastic around long fibers and the manufacture of a handle by plastic injection.
- the manufacture of the screen frame and of the junction part in one piece from a plastic material molded by a process other than injection makes it possible to increase the rigidity of the frame / junction part assembly.
- the handle can also be manufactured by molding around long fibers, or by injection of plastic material, which makes it possible to reduce the manufacturing cost while increasing the sensitivity or flexibility of play due to the better absorption of vibrations of the plastic injected by compared to those of optimal materials for the sieve frame.
- the vibration absorbing means are made of a material optimized to absorb vibrations. Given the fact that the vibration absorbing means can be easily exchanged, it is possible to manufacture several sets of vibration absorbing means, from vibration absorbing materials of different hardnesses. Each player can adapt the most appropriate vibration absorbing means during the game.
- the proposed manufacturing process is particularly efficient in that it essentially boils down to four simple manufacturing processes: molding, injection, stringing the screen frame and assembling the handle with the central screw.
- Fig. 1 is a plan view of a racket according to the invention in its assembled state
- Fig. 2 is a sectional view along a section line II-II of FIG. 1;
- Fig. 3 is a plan view on an enlarged scale of the junction part situated between the sieve frame and the racket handle in its assembled state, as shown in FIG. 1;
- Fig. 4 is an exploded view of the handle and of the joining part of the screen frame
- Fig. 5 is a side view of a screwing wrench.
- a tennis racket 1 comprises a handle 2, a sieve frame 3 comprising a frame part 4 for supporting the string and a junction part 5.
- the joining part 5 comprises two lateral joining arms 6, 7, a central joining arm 8 and a stiffening bridge 9.
- the two lateral joining arms 6, 7 are fixed, at one end 39, integrally, to the frame part 4 of the screen and extend respectively to free ends 10, 11 forming a fixing interface with the handle 2 .
- the stiffening bridge 9 comprises two parts of the stiffening arm 12, 13 attached integrally to the central joining arm 8 and to the arms of the respective lateral junctions 6, 7.
- the stiffening bridge mainly serves to stiffen the lateral joining arms 6, 7, which reduces their displacement in bending as a function of the tension of the rope. Indeed, the part of the screen frame 4 deforms as a function of the stringing tension, which causes a displacement of the lateral joining arms 6, 7, and in particular their rotation outwards in the direction of the arrows F in FIG. . 1, making the assembly and disassembly of the screen frame with the handle more difficult.
- the stiffening of the lateral joining arms 6, 7 in bending also has the advantage of being able to better control the rigidity of the frame part as well as the vibration characteristics of the racket.
- the stiffening bridge also makes it possible to stabilize the central joining arm 8 and make it more resistant to the tensile forces exerted by the central assembly screw.
- the central connecting arm 8 is fixed integrally to the lower central part of the frame part 4 of the screen. It has a free end 14 at the level of which a thread 15 is provided. The free end 14 is preferably located approximately halfway between the lower central part 16 of the screen frame part and the free ends 10, 11 of the lateral joining arms 7, 6.
- the two stiffening arm parts 12, 13 are respectively fixed integrally on the one hand to the two lateral joining arms 6, 7 respectively at the fixing points 17, 18, approximately at a height corresponding to approximately one third of the length of the two joining arms lateral 6, 7, as measured from the lower central part of the screen frame part, and on the other hand at central junction arm 8, near its free end 14.
- the fastenings integrally of the stiffening bridge respectively on the two lateral junction arms 6, 7 and on the central stiffening arm 8 could however be made at different heights of those mentioned.
- the stiffening arm parts 12, 13 are of slightly curved shape, which ensures a certain flexibility in the lateral joining arms as well as a reduction in local stresses at the fixing points 17, 18.
- the construction is such that the respective free ends 10, 11, 14 of the joining arms are all located outside of the screen frame part, so as not to weaken or interfere with the screen frame part.
- the handle 2 comprises a shell 19 which may advantageously be made of injected plastic, inside which a longitudinal cavity 20 is formed.
- This cavity 20 receives a metal fixing rod 21, the end of which corresponds to the junction part 22 of the handle intended to be fixed to the junction part 5 of the frame has a thread 23.
- a stop sleeve 24 made of a material elastic is fitted on the fixing rod 21. This abutment sleeve 24 elastically deforms laterally as indicated by dotted lines in FIG. 5, when it is crushed between the shoulder 25 mounted on the rod and the shoulder 26 disposed inside the cavity 20 of the handle during assembly of the handle 2 to the screen frame 3.
- a screwing tip 27 which can advantageously be terminated by a nut head 28 makes it possible to screw the thread 23 into the internal thread 15 formed at the free end 14 of the central joining arm 8.
- a termination fitting 30 is interposed between the shell 19 of the handle and the screwing tip 27. The screwing is carried out at using a screwing wrench 29 which fits into the slot 31 made in the screwing tip 27.
- the racket further comprises vibration absorbers 32, 33 comprising a central vibration absorber 33 and the two lateral vibration absorbers 32, as can best be seen in FIG. 4.
- the central vibration absorber 33 has a substantially cylindrical shape hollowed out centrally, to allow the passage of the fixing rod 21.
- the two lateral vibration absorbers 32 comprise a part 34 having a shape slightly tapered general frustoconical intended to be inserted in a housing 36 of complementary shape in the end of the junction part 22 of the handle.
- the vibration absorbers 32, 33 are compressed between the handle and the screen frame and the stop sleeve 23, which is then subjected to a longitudinal compressive force, elastically deforms transversely and comes into abutment contact against the shell 19 of the handle 2 of the racket, which increases the stiffening of the handle, but also makes it possible to absorb vibrations in the rod 21.
- the central vibration absorber 33 could be adapted at the end of the central junction arm 8 and the lateral vibration absorbers 32 could be mounted on the junction part 22 of the handle 2.
- the joining part 22 of the handle 2 further comprises a stiffening rib 37 formed on opposite faces of the part of the handle to increase the mechanical strength and the rigidity of the joining part.
- the materials constituting the screen frame 3 and the handle 2 can advantageously be different and optimized for the function as well as to facilitate the manufacture of the respective part.
- the choice of materials usable for the sieve frame is wider than for rackets in one room.
- the screen frame can be made from a metal alloy such as aluminum or titanium alloys.
- the handle can also be made from the same material as the frame, or from a different material by a different manufacturing process.
- the handle can be made of injected plastic, the advantage being its light weight and its low manufacturing cost, as well as its good capacity to absorb vibrations.
- the grip part of the handle 2 is covered with a coating favoring the grip of the racket, for example leather.
- the vibration absorbing means are made of an elastic plastic material the degree of elasticity of which is determined as a function of the player and the desired play in order to ensure optimum vibration damping characteristics at all times.
- the termination fitting 30 and the screwing tip 27 can be made of a plastic material, so that they are of low weight.
Landscapes
- Health & Medical Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Physical Education & Sports Medicine (AREA)
- Vibration Prevention Devices (AREA)
Abstract
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP02755504A EP1418990A1 (fr) | 2001-08-24 | 2002-08-14 | Raquette pour jeux de balles demontable et amortissement et son procede de fabrication |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP01120346 | 2001-08-24 | ||
EP01120346 | 2001-08-24 | ||
EP02755504A EP1418990A1 (fr) | 2001-08-24 | 2002-08-14 | Raquette pour jeux de balles demontable et amortissement et son procede de fabrication |
PCT/IB2002/003285 WO2003018142A1 (fr) | 2001-08-24 | 2002-08-14 | Raquette pour jeux de balles démontable et amortissementet son procede de fabrication |
Publications (1)
Publication Number | Publication Date |
---|---|
EP1418990A1 true EP1418990A1 (fr) | 2004-05-19 |
Family
ID=8178412
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP02755504A Withdrawn EP1418990A1 (fr) | 2001-08-24 | 2002-08-14 | Raquette pour jeux de balles demontable et amortissement et son procede de fabrication |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP1418990A1 (fr) |
WO (1) | WO2003018142A1 (fr) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN103861257A (zh) * | 2014-03-31 | 2014-06-18 | 吴俊� | 一种青少年用的羽毛球拍 |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CA1260979A (fr) * | 1985-01-24 | 1989-09-26 | Patrick Jeanrot | Raquette de jeux de balles a monture ou carcasse pliante et separable |
FR2617405B1 (fr) * | 1987-07-02 | 1989-11-17 | Cartier Int Bv | Raquette de jeux de balles, notamment de tennis, pliante |
FR2656537B1 (fr) * | 1990-01-02 | 1993-05-28 | Jeanrot Patrick | Raquette comportant un manche injecte et son procede de realisation. |
US5324030A (en) * | 1993-04-29 | 1994-06-28 | Tsou Ching Fang | Shock absorbing throatpiece of game racket |
GB2328379A (en) * | 1997-08-22 | 1999-02-24 | Dunlop Slazenger Group Ltd | Games racket |
-
2002
- 2002-08-14 EP EP02755504A patent/EP1418990A1/fr not_active Withdrawn
- 2002-08-14 WO PCT/IB2002/003285 patent/WO2003018142A1/fr not_active Application Discontinuation
Non-Patent Citations (1)
Title |
---|
See references of WO03018142A1 * |
Also Published As
Publication number | Publication date |
---|---|
WO2003018142A1 (fr) | 2003-03-06 |
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