DE8617718U1 - Tennis rackets for children - Google Patents

Description

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Tennis rackets for children

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The innovation concerns a tennis racket for children, old a frame, old one producing a ball bed Covering and bit a handle, the total length of the Racket 51 to 52 cm, the maximum width 23 to 24 cm and the length of the ball bed 30 to 32 cm.

Children's tennis rackets of this type are known. These tennis rackets take into account the different biomechanical goal exposures of children compared to adults in that they have sufficient ball acceleration despite a reduced racket length. In the known rackets, this is achieved by enlarging the striking surface, ie the ball bed, which is produced by the covering. The ball bed is given an elongated head shape for this purpose. Rackets with these dimensions, as mentioned above, are intended for children between the ages of 4 and 9 years. It has been found, however, that the known rackets are not easy to play because of their relatively high weight, especially for smaller children . On the other hand, if the weight is too low, a sufficiently high ball acceleration cannot be achieved, so that the disadvantage of the relatively high weight has hitherto been accepted.

The object of the innovation is to improve a racket of the type mentioned at the outset in such a way that

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it is easy to play even by young children and still achieves a sufficiently high ball acceleration,

This problem is solved old a racket of the type mentioned in that the total weight of the racket is 200 to 240 g and that the focus of the racket Ib is a distance of 21 to 25 cm to the handle-side end of the racket.

It has been found that with a sole bracket construction that results in a total racket weight of 200 to 240 g (including stringing) results in a very light and easily playable racket, which is easy to play even by small children. By arranging the center of gravity of the racket in such a way that it is further away from the handle-side end compared to adult clubs, it is possible to ensure a sufficiently good ball acceleration despite the low weight due to the longer lever arm created thereby. Such a racket is particularly suitable for playing with a normal size ball of a tennis ball, but has a reduced weight of 45 to 48 g.

It has been found that when using such special balls, which are lighter and have less internal pressure, the racket according to the invention can give beginners a quick sense of achievement, so that children can easily be introduced to this sport due to these advantages.

In an advantageous embodiment of the innovation is as Frame an extruded hollow profile frame made of a high-strength aluminum alloy is provided. An aluminum

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alloy that can be used for this is known under the trademark "Perradur". A frame made of this material makes it possible to easily create the desired teardrop-shaped head shape and, despite the low material thickness, as is achieved to achieve the low overall weight, ensures a high load capacity, i.e. the covering can absorb old high weight forces despite the low frame weight will.

line further development of the innovation provides that in the Hollow profile frame an elastic plastic heart from a thermosetting synthetic fiber is arranged. The la Handel coaat as synthetic fiber under the trade name "Kevlar * known synthetic fiber in question. This synthetic fiber generally has the highest tear resistance compared to glass fiber and graphite.

A further embodiment of the innovation provides that the handle is provided with a silicone coating. As a result, the handle has pleasant grip properties. Another, very advantageous embodiment of the innovation provides that a paint spray is provided on the covering. A paint spray is used as the paint spray which does not adhere firmly to the covering, ie the side, but rather is gradually rubbed off under mechanical stress, as it follows when a ball hits it. In this way it can then be determined at which point the player hits the balls most often. If the points of impact are generally away from the ideal point of impact in the center of the club, the teacher can see how corrective action must be taken to remedy these errors. In a preferred development, the paint spray is only in the middle area of the

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Covering applied at a distance of 3 to 5 cm from the frame . As a result , that area is generally covered with which the ball aa is hit or soled most frequently.

Another embodiment provides that a paint spray agent of one color is arranged on the covering in a central area and a paint spray agent of a different color is arranged in the edge area over a distance of 3 to 5 cm from the frame.

This solution also shows when and where the ball was hit at the edge of the covering.

In the drawing, an embodiment of the tennis racket according to the innovation is shown.

The racket is denoted by 1 as a whole. It consists of a frame 2, a covering 3. the handle 4 and a plastic heart 5.

The frame 2 is formed by an extruded hollow profile of a high-strength aluminum alloy and is so curved so that there is an elongated head shape for the face.

The total length L _{Q of} the racket is 51.5 cm, the

maximum club width 23.5 cm and the length L _{ß of} the seat bed 31 cm.

In particular, the strength and dimensions of the hollow profile which is used for the frame 2 are chosen together with the other elements of the racket so that the racket has a total weight between 200 to 240 g, especially 210 g.

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The center of gravity S of the racket is shifted into the ball bed and is at a distance AS from the handle-side End 4a of 24.5 cm.

Da3 plastic heart 5 consists of a duroplastic Synthetic fiber that has the highest tear resistance compared to fiberglass and graphite.

The handle 4 has a coating of silicone, what to good grip properties.

It has been found that a construction in which such a racket has a weight between 200 to 240 g and whose center of gravity S is in the position shown, has excellent playing characteristics as a children's racket. Despite the light weight, the Balls, especially if they are special balls with a lower weight, for example between 40 to 48 g, is to be played at the required speed without affecting the children for whom these rackets are intended to be overwhelmed in terms of strength.

In order to be able to determine whether the player has the ball in the ideal position essentially in the middle of the ball bed hits, the racket according to the innovation is provided in the middle area of the ball bed with an applied paint spray (hatched area 3a).

No spray is applied to the edge areas 3b at a circumferential distance from the frame 2 of 3 to 5 cm, because these areas are hardly used for stalking . The colorant is chosen in such a way that when it is subjected to mechanical stress, as occurs when balls hit, it becomes detached from the string, so that the point of impact becomes visible *

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This makes it possible to determine the number of hits and the point of hit exactly, so that the teacher has an opportunity, if necessary, to take appropriate corrective action.

In another solution, which is not shown here, it is provided that a spray paint of one color is applied in the central region 3a and a spray paint of a different color in the outer edge region 3b. In this way, ball touches in the edge area can also be detected.

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Claims (7)

Wolfgang Potutschnig Hlrschbergstr. 5 8184 Gmund tennis racket for children protection claims 1. Tennis racket for children, comprising a frame with a one ball bed generating stringing and a handle, wherein the total length of the racquet 51 to 52 cm _-1, the maximum width and length of the ball bed is 23 to 24 cm 30 to 32 cm, characterized in that the total weight of the racket (1) is 200 to 240 g and that the center of gravity (S) of the racket (1) at a distance (A_v of 24 to 25 cm from the handle-side end (4a) of the racket (1). 2. Tennis racket according to claim 1, characterized in that that the frame (2) is an extruded hollow profile frame made of a high-strength aluminum alloy is provided. 3. tennis racket according to claim 2, characterized in that that an elastic plastic heart (5) made of a thermosetting synthetic fiber is arranged in the hollow profile frame (2) is. 4. tennis racket according to at least one of the preceding claims, characterized, that the handle (4) _{: provided with} a silicone coating 5. tennis racket according to at least one of the preceding claims, characterized in that a paint spray is provided on the covering (3). 6. tennis racket according to claim 5, characterized in that that the paint spray is only in the middle area (3a) the covering (3) is arranged at a distance of 3 to 5 cm from the frame (2). 7. tennis racket according to claim 5, characterized in that on the covering (3) in a central area (3a) a paint spray of one color and a paint spray of a different color is arranged in the edge area (3b) at a distance of 3 to 5 cm from the frame (2).