JP2500927Y2 - Vibration absorption type FRP racket frame - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a racket frame, and more particularly to a racket frame made of FRP material and capable of absorbing almost all shocks before a shock wave reaching a handle of the racket.

[0002]

2. Description of the Prior Art According to a conventional manufacturing method made of FRP, a racket frame is made of a plurality of carbon fiber or glass fiber woven cloths filled in a thermosetting resin and formed into a long tubular object. Be combined to be done. Such a tube is placed in a mold cavity having the shape of a racket to be processed under heat and pressure so as to form an original racket. As a result, the racket frame so made is made of multiple layers of fibers that continuously spread from the head frame to the handle without interruption.

It is clear that a player using a racket is vulnerable to hand injury caused by an impact that is easily transmitted from the head frame hitting the ball to the handle portion. In order to mitigate the above hand injury accident, for example, there is a racket impact absorbing handle of Taiwan Patent No. 78201887. This patent includes a one-sided grip attached to the shaft of a racket, with an absorbent elastic body embedded between the two, and the bottom portion of the handle being spring connected. The shock absorbing handle of such a racket has a drawback that the structure is complicated in manufacturing, and the shock absorbing effect is insufficient in view of the fact that the shock absorbing handle is designed to weaken the shock only after the shock wave is transmitted to the handle.

The above-mentioned other categories are disclosed in Taiwan Patent No. 78210299. This is a racket handle made of FRP material, with a plurality of grooves filled with respective shock absorbing annuli. Such racket handles form a racket in which the fibers extend continuously from the head to the frame without interruption, thereby allowing a shock wave to be easily transmitted from the impacting head frame to the handle. , Shock absorption capacity is limited.

[0005]

SUMMARY OF THE INVENTION A first object of the present invention is to provide a racket frame which is made of FRP material and has the ability to harden the shock wave transmitted from the head frame hitting the ball to the handle. Another object of the present invention is to provide a racket frame made of FRP material and having appropriate strength and elasticity.

[0006]

To achieve the above object, the present invention comprises a thin-walled plastic tube and an FRP material, which is fixed to one of the outer peripheral surfaces of the thin-walled plastic tube and has a stalk portion of a racket frame. A first outer layer shell of FRP material forming a front part of the FRP material, and an FRP material, which is adjacent to the first outer layer and is fixed to the other outer peripheral surface of the thin-walled plastic tube. A vibration-absorbing FRP comprising a second outer layer shell of the FRP material to be formed and a reinforced surface layer made of the FRP material, which is fixed to the adjacent portion of the second outer layer shell and the first outer layer shell and covers the adjacent portion.
A racket frame was constructed.

Alternatively, a thin plastic tube and F
A first outer layer shell of FRP material, which is made of RP material, is fixed to one of the outer peripheral surfaces of the thin-walled plastic tubes, and forms the front part of the stalk of the racket frame, and the first outer layer is made of FRP material. A second outer layer shell of FRP material that is adjacent to the outer peripheral surface of the thin-walled plastic tube and is fixed to the other outer peripheral surface of the thin plastic tube to form the rear part of the stem portion;
A plurality of reinforcing pieces made of P material, fixed to adjacent portions of the second outer layer shell and the first outer layer shell, and covering the gaps;
A vibration absorption type FRP material racket frame is constituted by at least one of the first outer layer shell and the second outer layer shell and a reinforced surface layer fixed to the reinforcing piece.

The first outer layer shell and the second outer layer shell have a structure in which end portions adjacent to each other are formed with small slit-like joints, and the both joints are engaged with each other. You can

The present invention also comprises a thin-walled plastic tube and an FRP material, which is fixed to one of the outer peripheral surfaces of the thin-walled plastic tube and forms the front part of the stalk of the racket frame. A layered shell and an FRP material, which is adjacent to the first outer layer shell at a predetermined interval and is fixed to the other outer peripheral surface of the thin-walled plastic tube to form a rear portion of the shaft portion. (2) An outer layer shell and an FRP material, which are parallel to the axis of the shaft portion and are separated from each other, and are fixed to the adjacent portions of the first outer layer shell and the second outer layer shell to cover the adjacent portions. A plurality of reinforcing pieces, a first reinforcing surface layer that covers one end of the first outer layer shell and the reinforcing piece, and a second reinforcing surface layer that covers the other end of the second outer layer shell and the reinforcing piece. Vibration absorption type FRP material racket It is possible to configure the frame.

Alternatively, an elastic vibration absorbing piece having a predetermined length can be fitted between the plurality of reinforcing small pieces, and the elastic vibration absorbing piece can be attached to the outer peripheral surfaces of the first outer layer shell and the second outer layer shell. The structure may be fixed, or the elastic vibration absorbing piece may cover the space between the first outer layer shell and the second outer layer shell. In addition, at least one of the first outer layer shell and the second outer layer shell, and the plurality of reinforcing small pieces, a structure in which an elastic vibration absorbing piece is sandwiched, or a plurality of reinforcing small pieces and The elastic vibration absorbing piece may be sandwiched between the joint surfaces of the plurality of reinforcing surface layers.

[0011]

When the vibration-absorbing FRP racket frame configured as described above is used, the impact of the hit ball is transmitted from the first outer layer shell to the second outer layer shell via the reinforced surface layer, so that the player can The shock is relieved and transmitted to the rear part of the gripping stalk. Therefore, the player's hand is protected from the impact. The same applies when a reinforcing small piece or an elastic vibration absorbing layer is used instead of the reinforcing surface layer.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of the present invention will be described with reference to the drawings. As shown in FIGS.
Has a frame portion 12 and a shaft handle portion 14 extending in the axial direction from an open end of the frame portion 12. The stalk 14 includes a first outer layer shell 20 made of an FRP material forming a front portion 142 connected to the frame portion 12, and a second outer layer shell 22 made of an FRP material forming a rear portion 144 of the stalk portion 14. Have and.

First outer layer shell 20 and second outer layer shell 22
Are adjacent to each other at their ends, and are thin-walled plastic tubes 1
6 and the surfaces of the first outer layer shell 20 and the second outer layer shell 22 are covered with the first outer layer shell 20 and the second outer layer shell 2.
A reinforcing surface layer 26 covering the space between the two is affixed.
In the manufacturing process of the racket frame 10, as the first outer layer shell 20 and the second outer layer shell 22, a plurality of fiber woven fabrics impregnated with a thermosetting resin and not yet cured are sequentially wound around a thin plastic tube 16. Attach and form.

When the first outer layer shell 20 and the second outer layer shell 22 are wound, the first outer layer shell 20 and the second outer layer shell 2 are wound.
The outer peripheral surface of the two adjacent portions is wrapped with a reinforcing surface layer 26 made of a FRP material to cover the space between the adjacent portions, and the first outer layer shell 2
0, the second outer layer shell 22, and the reinforced surface layer 26 are put into a mold and pressed and heated to cure and mold.

The racket frame 10 includes a first outer layer shell 20 and a second outer layer shell 2 as shown in the second embodiment of FIG.
Two joints 201 and 221 formed into small pieces by slits are formed at the ends adjacent to each other, and the joints 201 and 221 are inserted into the slits of the other side to mesh the adjacent portions with each other. be able to. The joint portions 201 and 221 are covered with the reinforcing surface layer 26. Alternatively, a single elastic vibration absorbing layer 28 made of a soft plastic material having a predetermined width is fixed and covers the joint portions 201 and 221.

The first outer layer shell 2 of the racket frame 10
0, since the fibers of the second outer layer shell 22 are not continuous with each other, when the racket frame 10 hits the ball,
Most of the shock wave traveling from the frame 12 to the stalk 14 is effectively blocked at the interval between the first outer layer shell 20 and the second outer layer shell 22. Therefore, if the player holds the rear part 144 of the shaft portion 14, the residual shock wave transmitted to the player's hand is small, and the movement disorder can be effectively avoided.

FIGS. 4, 5, 6 and 7 show a third embodiment of the present invention, in which the racket frame 30 has a frame portion 32.
And the stalk 34. Racket frame 30
Is a thin-walled plastic tube 36, a first outer layer shell 40 made of FRP material that constitutes the frame portion 32 and the front portion 342 of the stalk portion 34, and a first outer layer shell made of FRP material that constitutes the rear portion 344 of the stalk portion 34. And two outer layer shells 42.

A space 44 is formed between the first outer layer shell 40 and the second outer layer shell 42, and the outer circumferences of the first outer layer shell 40 and the second outer layer shell 42 are made of an FRP material. Face 90
Four reinforcing small pieces 46, which are arranged at positions separated from each other and cover the space 44, and whose both ends are fixed to the first outer layer shell 40 and the second outer layer shell 42, are provided. And FIG.
As shown in FIG. 1, the first outer surface shell 40 and the first outer surface shell 48 fixed to one end of the small reinforcing piece 46, and the second outer layer shell 40.
And a second reinforcing surface layer 50 fixed to the other end of the reinforcing piece 46.
Is provided. Racket frame 30 of the third embodiment
Also, the shock absorbing effect is effectively achieved, and the racket frame 30 achieves the purpose of maintaining appropriate strength and elastic force.

FIG. 7 shows a fourth embodiment of the present invention. In order to further enhance the shock absorbing ability of the racket frame 30, the reinforcing small piece 46 and the joining surface of the first outer layer shell 40 and the second outer layer shell 42 are joined together. Elastic vibration absorbing pieces 52 and 54 formed of a soft plastic material can be fixed between the two.

8 and 9 show a fifth embodiment of the present invention, FIG. 10 shows a sixth embodiment of the present invention, and the racket frame 60 is
It has a frame portion 62 and a shaft handle portion 64. The structure of the racket frame 60 is almost the same as that of the racket frame 30 described above, except that four reinforcing small pieces 76 are provided in the space 74 formed between the joint surface of the first outer layer shell 70 and the second outer layer shell 72.
(76 'in FIG. 10) is provided, and an elastic vibration absorbing piece 78 (78' in FIG. 10) made of a soft plastic material and parallel to each reinforcing small piece 76 is fitted between the reinforcing small pieces 76.

Therefore, the racket frame 60 can more effectively block the vibration waves generated at the time of hitting the ball.
In addition, the reinforcing small piece 76 and the elastic vibration absorbing piece 78 are shown in FIG.
It can be arranged as shown at 0.

In the seventh embodiment shown in FIGS. 11, 12 and 13 and the eighth embodiment shown in FIG. 14, the racket frame 80 comprises a thin plastic tube 81 and a first outer layer shell molded from FRP material. 82 and the first outer layer shell 82
A second outer layer shell 84 made of an FRP material having a predetermined spacing 86, and an elastic vibration absorbing layer 88 (88 'in FIG. 13) formed of a soft plastic material and covered at the spacing 86,
Four reinforcements which are molded from FRP material and are located at 90 degree positions on the outer peripheral surfaces of both outer layer shells 82 and 84, respectively, and which are fixed at both ends across the space 86 to both outer layer shells 82 and 84. A small reinforcing piece 90 (90 'in FIG. 13) and a FRP material, and a first reinforcing layer 92 that covers one end of each reinforcing small piece 90 and the first outer layer shell 82, and an FRP material. It has a second reinforcing layer 94 covering the other end of 90 and the second outer layer shell 84.

The first outer layer shell 82 is the racket frame 8
0 of the frame portion 100 and the front portion 104 of the stalk portion 102, and the second outer layer shell 84 is the rear portion 106 of the stalk portion 102.
Is composed. The first outer layer shell 82 and the second outer outer layer shell 84 are separated from each other without making contact with each other, and the elastic vibration absorbing layer 88 is provided in the space 86 between the first outer layer shell 82 and the second outer outer layer shell 84. It is covered.

Therefore, the shock wave of the hitting ball of the frame portion 100 is blocked in a large amount by the interval 86, is absorbed by the elastic vibration absorbing layer 88, and is relaxed and transmitted to the player's hand holding the rear portion 106 of the shaft portion 104, The occurrence of movement disorders can be prevented. Also, the first outer layer shell that covers the front and rear ends of each reinforcing small piece 90 by setting the four reinforcing small pieces 90 to have a predetermined width and length as necessary and making the fiber direction across the space 86. The presence of 82 and the second outer layer shell 84 can enhance the strength and elasticity of the racket frame 80.

[0025]

Since the present invention is constructed as described above, the impact of the hit ball applied to the head frame is effectively absorbed, and the hand holding the racket is protected from the obstacle caused by the impact. Further, since the front part and the rear part of the stalk portion of the racket are connected by the reinforced surface layer or the like, the stalk portion has necessary strength and elasticity. Therefore, the ball hitting motion of the player is transmitted to the ball without being reduced.

[Brief description of drawings]

FIG. 1 is a perspective view of a racket frame showing a first embodiment of the present invention.

2 is a sectional view taken along line 2-2 of FIG.

FIG. 3 is an exploded perspective view of a handle portion of a racket frame showing a second embodiment of the present invention.

FIG. 4 is a perspective view of a racket frame showing a third embodiment of the present invention.

5 is a sectional view taken along line 5-5 of FIG.

6 is a sectional view taken along line 6-6 of FIG.

FIG. 7 shows a fourth embodiment of the present invention, in which the handle is shown in FIG.
It is sectional drawing cut | disconnected by the cross section similar to 6 cross section.

FIG. 8 is a perspective view of a racket frame showing a fifth embodiment of the present invention.

9 is a sectional view taken along line 9-9 in FIG. 8;

FIG. 10 shows a sixth embodiment of the present invention, in which the handle is shown in FIG.
It is sectional drawing cut | disconnected by the cross section similar to 9 cross section.

FIG. 11 is a perspective view of a racket frame showing a seventh embodiment of the present invention.

12 is a sectional view taken along line 12-12 of FIG.

13 is a sectional view taken along line 14-14 of FIG. 11.

FIG. 14 shows an eighth embodiment of the present invention in which the handle portion is shown in FIG.
It is sectional drawing cut | disconnected by the cross section similar to -12 cross section.

[Explanation of symbols]

 10,30 Racket frame 60,80 Racket frame 12,32 Frame portion 62,100 Frame portion 14,34 Shaft handle portion 64,102 Shaft handle portion 142,342 Front portion 104 Front portion 144,344 Rear portion 106 Rear portion 20,40th One outer layer shell 70,82 First outer layer shell 22,42 Second outer layer shell 72,84 Second outer layer shell 16,36 Thin-walled plastic tube 81 Thin-walled plastic tube 26 Reinforced surface layer 201,221 Joint part 28 Elastic absorption Layer 44,74,86 Spacing 46 Reinforcement piece 48 First reinforced surface layer 50 Second reinforced surface layer 76,90 Reinforcement piece 52.54 Elastic vibration absorbing piece 78,88 Elastic vibration absorbing piece 92 First reinforced layer 94 Second reinforced layer

Claims (9)

(57) [Scope of utility model registration request] 1. A first outer layer shell of FRP material, which comprises a thin-walled plastic tube and an FRP material, and which is fixed to one of the outer peripheral surfaces of the thin-walled plastic tube and forms the front part of the stalk of the racket frame. A second outer layer shell of FRP material, which is made of FRP material, is adjacent to the first outer layer, is fixed to the other outer peripheral surface of the thin-walled plastic tube, and forms the rear part of the stem portion, and is made of FRP material. A vibration-absorbing type FRP material racket frame which is constituted by a reinforced surface layer which is fixed to the adjacent portion of the second outer layer shell and the first outer layer shell and covers the adjacent portion. 2. A first outer layer shell of FRP material, comprising a thin-walled plastic tube and an FRP material, which is fixed to one of the outer peripheral surfaces of the thin-walled plastic tube and forms the front part of the stalk of the racket frame. A second outer layer shell of the FRP material, which is made of FRP material, is adjacent to the first outer layer with a gap therebetween, and is fixed to the other outer peripheral surface of the thin-walled plastic tube to form the rear portion of the shaft portion; At least one of the first outer layer shell and the second outer layer shell, which is made of an FRP material and is fixed to adjacent portions of the second outer layer shell and the first outer layer shell and which covers the gap. A vibration absorption type FRP material racket frame composed of one and a reinforced surface layer fixed to the above-mentioned reinforced small piece. 3. The first outer layer shell and the second outer layer shell have a joining portion formed into a small piece by a slit at the end portions adjacent to each other, and the joining portions are meshed with each other. The vibration absorption type FRP material racket frame according to claim 1 or 2. 4. A first outer layer shell of FRP material, comprising a thin-walled plastic tube and an FRP material, fixed to one of the outer peripheral surfaces of the thin-walled plastic tube, and forming the front part of the stalk of the racket frame. A second outer layer shell of the FRP material which is made of an FRP material, is adjacent to the first outer layer shell with a gap, and is fixed to the other outer peripheral surface of the thin-walled plastic tube, and forms the rear part of the stalk. A plurality of reinforcing pieces which are made of FRP material and which are parallel to the axis of the stalk and are separated from each other and fixed to the adjacent portions of the first outer layer shell and the second outer layer shell to cover the adjacent portions. A vibration absorbing structure constituted by a first reinforced surface layer covering one end of the first outer layer shell and the reinforcing small piece, and a second reinforced surface layer covering the other end of the second outer layer shell and the other small reinforcing piece. Type FRP
Wood racket frame. 5. An elastic vibration absorbing piece having a predetermined length is fitted between the plurality of reinforcing small pieces.
A shock absorbing racket made of the described FRP material. 6. The shock absorbing racket made of an FRP material according to claim 5, wherein the elastic vibration absorbing piece is fixed to outer peripheral surfaces of the first outer layer shell and the second outer layer shell. 7. The shock absorbing racket made of an FRP material according to claim 4, wherein an elastic vibration absorbing piece covers the space between the first outer layer shell and the second outer layer shell. 8. An elastic vibration absorbing piece is sandwiched between at least one of the first outer layer shell and the second outer layer shell and the plurality of reinforcing small pieces. An impact absorbing racket made of the FRP material according to items 4, 5, and 7. 9. An impact absorbing member made of an FRP material according to claim 4, wherein an elastic vibration absorbing piece is sandwiched between joint surfaces of the plurality of reinforcing small pieces and the plurality of reinforcing surface layers. racket.