CN2291945Y - Improved racquet center shaft - Google Patents

Abstract

The utility model provides a racket middle shaft with better safety in use, which is a hollow body in structure, and the body is mainly formed by a plurality of first fiber bundles in a cross overlapping or winding way, and is characterized in that the body is further provided with a plurality of second fiber bundles, and each second fiber bundle is positioned at the outer edge of each first fiber bundle for forming the body and extends for a preset length along the axial center direction of the middle shaft. This not only makes it more secure, but also distinctive in appearance.

Description

Improved racquet center shaft

The utility model is related to a racket with a net-shaped racket surface, in particular to a structure of the center shaft of this type of racket with better strength and safety.

According to the commonly used rackets, especially badminton rackets, tennis rackets or squash rackets with mesh batting faces, the central axis connected between the racket face and the handle is traditionally made of tubular metal materials. , so that the club has the advantages of high strength and durability, but because of its heavy weight, it will cause inconvenience for users to carry, and the weight of the central axis will cause the center of gravity of the entire racket to move to a distance from the handle. Therefore, when the user swings the racket to hit the ball, in addition to having to exert a large force, it is also difficult to control the direction when it hits the ball back. Therefore, the manufacturing materials of the aforementioned rackets have been gradually replaced by plastic composite materials containing reinforcing fibers.

Although the racket made of fiber-reinforced plastic composite material has the advantage of being lighter in weight, it is also very brittle due to its texture, and it will cause damage when it is subjected to strong impact or deflection (such as when hitting the ball). When its structure is damaged, the central axis will be broken into two immediately; and because the fracture phenomenon often occurs when the user swings the ball with great force, when the central axis is broken, it is not used. The end held by the player will fly out with the swinging action of the user, and this situation is very likely to cause harm to the user, opponent or bystanders.

In view of the above-mentioned problems, the general racket manufacturer adopts a solution to increase the amount of fiber material contained in the racket shaft, thereby improving the strength of the racket, but when the amount of fiber must be increased a lot , will cause the situation that this racket cost is too high. Moreover, only using reinforcing fibers to increase the strength of the racket can only reduce the chance of the racket breaking, and cannot avoid the danger that the part connected with the racket face will still fly out and hurt people once it is broken. .

The main purpose of this utility model is to provide an improved racket center shaft, which only increases the amount of composite fiber material by a small amount compared with the conventional one, but can greatly improve its safety.

Another object of the present invention is to provide an improved racket center shaft, which has a greater change in appearance than the conventional racket, so that compared with the conventional racket, which can only be sprayed with paint on its outer edge, it has a considerable impact. difference.

In order to achieve the above-mentioned purpose, the structure of the racket center shaft of the present invention includes: a body, which is formed by an appropriate amount of thermosetting or thermoplastic resin and a number of first fiber bundles that are cross-wound or twisted, and become a predetermined shape. The length is tubular; several second fiber bundles have higher toughness than the first fiber bundles, and are arranged at the outer edge of the main body at a predetermined distance apart, and are respectively parallel to the axial direction of the main body. In this way, when the racket with the center shaft is broken due to the flexure at the moment of hitting the ball, each of the second fiber bundles can still be connected to the broken two-section center shaft, so as to prevent it from being broken. The end held by the user flies out, which further increases the safety in use.

The safety of the racket of the present invention formed by the above is greatly improved, and it is easy to identify.

Now give some preferred embodiments of the present utility model, and cooperate with drawings to do further detailed description as follows, wherein:

Fig. 1 is the front view of preferred embodiment (1) of the utility model;

Fig. 2 is the expanded schematic diagram of preferred embodiment (1) of the present utility model;

Fig. 3 is the sectional view of preferred embodiment (one) of the present utility model along the 3-3 direction in Fig. 1;

Fig. 4 is the sectional view of preferred embodiment (two) of the utility model along the same direction in Fig. 2;

Fig. 5 is the front view of preferred embodiment (three) of the utility model;

Fig. 6 is the sectional view of preferred embodiment (four) of the present utility model along the 6-6 direction in Fig. 4;

Fig. 7 is the sectional view of preferred embodiment (four) of the present utility model along the direction of 7-7 in Fig. 6;

Fig. 8 is the front view of preferred embodiment (five) of the utility model;

Fig. 9 is the front view of the preferred embodiment (6) of the utility model;

Fig. 10 is the top view of preferred embodiment (6) of the utility model;

Fig. 11 is the front view of the preferred embodiment (seven) of the utility model;

Fig. 12 is a front view of a preferred embodiment (eight) of the utility model.

First please refer to Fig. 1 to Fig. 3, the utility model takes the central shaft 10 of a badminton racket as an example, its upper end is connected with a ring frame 12 through a connecting piece 11 when it is in use, and the lower end is connected with a handle 13 connected, and the inner edge of the ring frame 12 is provided with a net-shaped racket face 14 made of net wires.

The shaft 10 includes a body 20 and a plurality of second fiber bundles 30 made of a plurality of first fiber bundles and thermosetting (or thermoplastic) resin. Each of the first fiber bundles is arranged parallel to each other in a resin layer with an appropriate thickness to form a fiber woven sheet, and the tubular body 20 is formed by winding and heating and shaping, and in order to make the body 20 has a good ability to resist twisting, therefore, each of the first fiber bundles will extend in a helical manner in the body 20 after the fiber woven board is wound. As for each of the second fiber bundles 30, they have an appropriate length, and after the winding of the main body 20 is completed, they are pasted on the outside of the main body 20 in a manner parallel to the axial direction of the central axis 10 and separated by an appropriate distance. edge.

It should be pointed out again that the aforementioned second fiber bundles 30 can certainly be made of high-strength materials to strengthen the anti-winding strength of the racket center shaft 10; The material is better (such as the DYNEEMA fiber produced by Holland DSM company or the KEVLAR fiber produced by U.S. DuPont and other high-toughness materials), so that the central shaft 10 can hit the ball on the racket face 14 (not shown in the figure) (shown) when the moment of bending is broken, each of the second fiber bundles 30 can still be connected between the central axis 10 that has been broken into two sections, so that the section that is not held by the user will not Fly out to ensure the safety of its use.

And, because this second fiber bundle 30 can just be arranged on the outer edge of this main body 20 after dyeing, therefore, will make it form quite obvious many stripes outside this central axis 10, and each this stripe can not only improve The aesthetic feeling of the original body 20 with monotonous color and luster serves the purpose of stimulating consumption for the manufacturer; especially for consumers, they can judge whether the selected player is a high-safety racket with the naked eye, thereby also achieving Reduce the trouble when it chooses a racket.

Please refer to Fig. 4, when each of the second fiber bundles 30 is made of a rather tough material and placed on the outer edge of the body 20, since the high toughness material is not easy to be processed by grinding, the surface is smooth, so as to improve its appearance. Aesthetics, so each of the outer edges of the main body 20 and the second fiber bundle 30 can be coated with a layer of transparent glue or paint, or a layer of transparent or translucent fiber or glass with an appropriate thickness can be wound on the outer edge. Cloth, thereby forming a surface layer 40 which can be abraded to make it appear shiny.

Please refer to Fig. 5, although the aforementioned body 20 can be formed by winding a fiber woven board, it can also directly wind each of the first fibers on the outer edge of a shaft (not shown) through a tool. , and make it reciprocally wound several times to form concentric and independent multiple layers (because this is a conventional technology and will not be described in detail here), and whether the winding layer is placed outside or the winding layer However, the structure of disposing each of the second fiber bundles 30 on the outer edge of the main body 20 is still the same as above.

Of course, the multi-layer body 20 is also set to be mixed with the above-mentioned winding layers and winding layers (not shown in the figure), but each of the second fiber bundles 30 on it is still arranged on the outermost layer. better.

Please refer to Fig. 6 to Fig. 8 again, since the shape of the center shaft 10 of a general racket is occasionally based on the consideration of dispersing its stress, one or several parts thereof are set to be convex or flat, and in this type of center shaft 10, each of the second fiber bundles 30 is set to undulate along its outer edge.

Please refer to Fig. 9 and Fig. 10 again, the central shaft 10 of the racket disclosed by it forms a conical portion 15 at the joint with the handle 13 at its lower end, but each of the second fibers extending downward from the upper end of the central shaft 10 The bundle 30 still extends to the end of the central axis 10. Therefore, if one looks down from the upper end of the central axis 10, each of the second fiber bundles 30 extends to the arrangement of the conical portion 15, Then it will be in radial shape corresponding to its axis center and spaced equidistantly.

The conical portion 15 in the structure of the aforementioned racket central shaft 10 can be fixed only at the lower end for connecting with the handle 13, so that the central shaft 10 is generally straight from the middle section above, but in reality In terms of application, please refer to Fig. 11 and Fig. 12, the central shaft 10 respectively disclosed also uses the conical structure, and the length of the conical structure extends to the entire central shaft 10, and its outer diameter The gradually increasing extension direction can be set as extending from top to bottom as shown in Figure 11, or it can be set as extending from bottom to top as shown in Figure 12, and each second fiber bundle on the central axis 10 30 will then extend radially as shown in FIG. 10 .

Claims (6)

1. the racket axis of an improvement is characterized in that including:

One body, by an amount of thermosetting or thermoplastic resin with and be and intersect some first fibre bundles of reeling or twining shape and formed, and be tubulose with predetermined length;

Some second fibre bundles for toughness is high material than this first fibre bundle, and have suitable length, and are laid in the outer rim of this body in the mode of the preset distance of being separated by, and parallel with the axis direction of this body respectively.

2. according to the racket axis of the described improvement of claim 1, it is characterized in that further comprising the top layer of a transparent or semitransparent shape that is overlayed on this body outer rim, and respectively this second fibre bundle is between respectively between this body and this top layer.

3. according to the racket axis of the described improvement of claim 1, some is rolled to it is characterized in that wherein this intrinsic respectively this first fibre bundle, and another partly is the winding shape.

4. according to the racket axis of the described improvement of claim 1, it is characterized in that wherein the predetermined position of this body outer rim has at least one boss, and respectively this second fibre bundle its corresponding to this boss place, still be laid in its outer rim place.

5. according to the racket axis of the described improvement of claim 1, it is characterized in that wherein the predetermined position of this body outer rim has at least one cone shape position that is, and respectively this second fibre bundle is along the outer rim extension at this cylindric position, and make its corresponding to this body axle center for being radial arrangement.

6. according to the racket axis of the described improvement of claim 1, it is characterized in that wherein respectively the color of this first, second fibre bundle is also inequality.

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