DE19947322A1 - Table tennis bat with front and rear flats incorporates hollow plastics damper-filled balls or spheres glued into handle recesses against vibration. - Google Patents

Abstract

Hollow bodies (11,12) in or on the bat (1) are filled with free-moving dampers to cushion the mechanical vibration of the bat, with hollow bodies differing in size for preference and specifically in the shape of hollow spheres or balls. The bodies are fitted in or on the bat handle (14) as recessed to take them (11,12), the bodies being glued into place. The handle forms two shells (9,10), each with its glue strip. The bat has flat front and rear faces (3,4), each of which has a table tennis covering (5,6).

Description

The invention is based on a table tennis racket the genus of the main claim.

DE 299 03 021 U1 describes a table tennis racket the genus of the main claim is known. The one from this Known table tennis racket has a flat body, which is connected with two handle scales is on. To the weight of the table tennis racket reduce, the handle scales and the base body each have a recess, whereby a hollow handle is formed is. The publication proposes the hollow handle foam to increase the susceptibility of the hollow handle to breakage reduce and the handle scales better with the body connect to. In addition, vibrations caused by Ball bounce occur, are reduced.

In the known from DE 299 03 021 U1 Table tennis racket is made by the at a ball contact transmitted impulse of the flat basic body to vibrate excited. This vibration is from the base body over the Transfer grip to a player's hand. The known table tennis racket the disadvantage that the hollow handle due to its low mass, the vibrations almost undamped from the base body to the player's hand transmits. Due to its small mass, the rigid, solidified foam does not significantly affect the vibrations reduce. The lighter design of the table tennis racket according to DE 299 03 021 U1, which of course has numerous advantages has, therefore, the disadvantage that the Table tennis racket is more susceptible to vibration, which makes Ball feel is deteriorated and higher mechanical Acts on the hand.

A table tennis racket is known from DE 44 30 476 A1, which has a flat base body, which with two Handle scales made of solid material is connected, so that a  Handle is formed. With this table tennis racket the vibrations also from the flat base body transfer the hand of the player.

The object of the invention is therefore a Table tennis racket to create a mechanical Vibration of the table tennis racket is damped Load on a player's hand is reduced and at the same time a better feeling of the ball when playing one Table tennis balls is reached.

The object is achieved by an inventive Table tennis racket with the features of claim 1 solved.

An advantage of the invention is that the hollow body according to the invention filled with damping bodies on any table tennis racket without much effort can be attached so that the invention is universal for Use can come.

Another advantage is that the good Vibration property of the invention Table tennis racket at least without an essential one Mass increase can be achieved, so that the invention with special advantage with very light, weight-optimized Table tennis rackets, which are naturally more susceptible to vibration are used.

The invention also new construction methods Table tennis racket allows, so far because of a unfavorable vibration behavior can not be realized could.

By the measures listed in the subclaims advantageous developments of that specified in claim 1 Table tennis racket possible.  

The wall thickness of the hollow body is advantageous small compared to the size of the hollow body. This means the damping bodies have a larger space available, what has an advantageous effect on the damping. Besides, will the mass of the hollow body is reduced. The wall thickness must don't be constant.

It is advantageous that the hollow body is made of plastic. As a result, the hollow body can be manufactured inexpensively and also has a lower mass.

It is advantageous that the hollow body at least in is essentially hollow spherical. This means that at a Vibration the damping body in the hollow body especially well mixed so that the damping is further improved.

It is advantageous that the damping bodies are spherical and / or consist of graphite. This will make one advantageous dissipation of the vibrational energy achieved. In addition, spherical damping bodies are made of graphite easy to manufacture.

It is advantageous that the handle has a recess, in which the hollow body is arranged. This is the Hollow body permanently arranged on the handle. Besides, can thereby the hollow body can be integrated into the handle without that the outer shape of the handle changes.

The handle advantageously has an elongated one Recess in which several hollow bodies evenly are distributed. This makes one special effective and even damping achieved. Besides, can this way the mass of the table tennis racket in be advantageously reduced, with one on the vibration behavior of the table tennis racket unfavorable effective mass reduction through the hollow body is overcompensated.  

Advantageously, the hollow body for gluing in the recess is attached to an adhesive strip. Thereby becomes the number of operations for arranging and fixing the hollow body in the recess is significantly reduced. In addition, by attaching the hollow body to the Adhesive strips the arrangement and spacing of the hollow body fixed, which prevents installation errors.

It is advantageous that the handle has two handle shells has that with the front or with the back of the Basic body are connected, and that at least one Handle shell has a recess in which at least one Hollow body is arranged. This allows the invention implement particularly easily and inexpensively, since all other components of the table tennis racket unchanged can be taken over. In addition, well-known This makes table tennis rackets particularly easy to retrofit.

It is advantageous that the base body in the area of Handle has a recess in which at least one Hollow body is arranged. The hollow body is then on the Center axis of the table tennis racket arranged what is favorable to the vibration behavior of the Table tennis racket affects.

It is advantageous that the handle scales and the base body have interconnected recesses that one Form hollow handle in which at least one hollow body is arranged is, and that the recess has a foam filling, in which the hollow body or bodies are embedded. This allows the advantages of a light construction and a good one Damping combined with a stable handle design become. In addition, the hollow body through the foam filling advantageously fixed in the handle.

Embodiments of the invention are in the drawings shown in simplified form and in the following Description explained in more detail. Show it  

FIG. 1A, a first embodiment of a fiction, modern table tennis racket in the front view;

FIG. 1B, the first embodiment of a fiction, modern table tennis racket in side view;

Figure 2A shows the section designated 1A in Fig IIa with a table tennis bat according to the invention in a second embodiment..;

Figure 3A shows the section designated 1A in Fig IIa with a table tennis bat according to the invention in a third embodiment..;

3B shows a section through the inventive table tennis racket of the third execution example taken along the direction indicated in Figure 3A IIIb cutting line..;

Fig. 4 is a grip shell of a fourth embodiment example of the table tennis racket according to the invention; and

Fig. 5 shows an embodiment of a hollow body according to the invention.

Fig. 1A shows a first embodiment of a table tennis racket 1 according to the invention. The table tennis racket 1 is used in particular for playing table tennis. However, the table tennis racket 1 is also suitable for other similar ball games.

The table tennis racket 1 has a flat base body 2 . The base body 2 preferably consists of several plywood layers between which special layers of plastic, carbon or the like can be arranged. The base body can also be made of another material, such as. B. plastic or a composite material. The base body 2 , as shown in FIG. 1B, has a flat front 3 and a flat rear 4 , which are connected to table tennis surfaces 5 , 6 . The table tennis coverings 5 , 6 are preferably made of rubber, the specific properties of the table tennis coverings 5 , 6 being selected according to the specifications of the player. In order to prevent loosening of the table tennis toppings 5 , 6 in the edge area 7 of the base body 2 , the base body 2 in the area of the table tennis toppings 5 , 6 can be connected at least partially circumferentially with an adhesive tape on the side surface 8 , which the table tennis coverings 5 , 6 on the side surface 8 at least partially overlapped.

The base body 2 is connected to grips 9 , 10 , the connection z. B. is done by gluing. The grip panels 9 , 10 can be made of wood, in particular plywood or plastic. However, the grip shells 9 , 10 can also consist of other materials. Hollow bodies 11 , 12 are arranged in the handle shells 9 , 10 , each of which is filled with a large number of damping bodies which are freely movable in the hollow bodies 11 , 12 . A structure of a damping body is described in the description of FIG. 5. The hollow bodies 11 , 12 are arranged in the upper part 13 of the handle shells 9 , 10 .

The handle shells 9 , 10 form with the plate-shaped base body 2 a handle 14 which in this exemplary embodiment has no further cavities with the exception of the cutouts for receiving the hollow bodies 11 , 12 .

When striking or flashback of a table tennis ball with the front side 3 or the back 4 of the table tennis racket 1 by means of the table tennis pad 5 or the Table Tennis covering 6 of the basic body 2 is excited table tennis racket 1, starting from the point of incidence of the table tennis ball on the table tennis surface 5 or the table tennis surface 6 to oscillate, wherein the vibration continues in the handle 14 . The filled hollow body 11 , 12 dampens the vibration in the upper part 13 of the handle 14 , so that the vibration subsides quickly and the base body 2 of the table tennis racket 1 comes to rest after a short time. In addition, the vibration energy transmitted to a hand holding the handle 14 is greatly reduced by the damping by means of the filled hollow bodies 11 , 12 .

In the first embodiment, as in the other embodiments of the table tennis racket according to the invention, the handle 14 is formed by the substantially straight handle shells 9 , 10 , so that the handle 14 has an essentially oval cross section, the cross-sectional area of which over the length of the handle is essentially constant. An exception are the bevels 15 , 16 of the handle shells 9 , 10 , which enable the handle 14 to be held better.

However, the invention is not limited to the illustrated embodiment of the handle scales 9 , 10 , but can be used with any handle shapes, such as. B. concave, conical or anatomical handle shapes are used.

FIG. 2A shows the Fig. 1A beizeichneten IIa with detail of a table tennis racket 1 of a second embodiment. FIG. 2B shows a section through the table tennis racket 1 of the second exemplary embodiment along the section line labeled IIb in FIG. 2A. Elements that have already been described are provided with the same reference numerals, so that a repetitive description is unnecessary.

The grip shells 9 , 10 of the second exemplary embodiment have cutouts 20 , 21 which are separated from one another by the base body 2 of the table tennis racket 1 . The recesses 20 , 21 are closed with closure bodies 22 , 23 . The grip shells 9 , 10 are therefore connected to the base body 2 in the edge regions 24 , 25 , in the upper part 13 and by means of the closure bodies 22 , 23 .

A plurality of hollow bodies 11 , 12 are arranged in the cutouts 20 , 21 and are fastened to the inner surfaces 28 , 29 of the handle shells 9 , 10 by means of adhesive strips 26 , 27 .

The filled hollow bodies 11 , 12 dampen an oscillation transmitted to the handle shells 9 , 10 via the base body 2 , the damping taking place uniformly over the length of the handle 14 .

The recesses 20 , 21 in the handle shells 9 , 10 also reduce the mass of the handle 14 , thereby reducing the mass and thus the weight of the table tennis racket 1 .

The recesses 20 , 21 can be foamed, in particular before they are closed with the closure bodies 22 , 23 , so that the recesses 20 , 21 are filled with a solid, hardened foam filling. A suitable foam filling is given in the description of FIGS . 3A and 3B. In the case of a foam-filled handle 14 , the hollow bodies 11 , 12 are at least partially embedded in the foam, so that they are additionally fixed. In addition, the handle shells 9 , 10 are additionally connected to the base body 2 via the foam filling, so that the stability of the handle is improved.

FIG. 3A shows the detail of a table tennis racket according to the invention, designated IIa in FIG. 1A, in a third exemplary embodiment. FIG. 3B shows the table tennis racket 1 of the third exemplary embodiment along the section line labeled IIIb in FIG. 3A. Elements that have already been described are provided with the same reference numerals, so that a repetitive description is unnecessary.

In the table tennis racket 1 of the third exemplary embodiment, the grip shells 9 , 10 have the total recesses 20 , 21 , which are connected to one another via a recess 30 of the base body 2 , as a result of which a recess 31 is formed. The cutouts 20 , 21 , 30 are elongated. The handle shells 9 , 10 are connected to the base body 2 in the upper part 13 , in the lower part 32 and in the edge regions 24 , 25 , whereby a hollow handle 33 is formed.

The recess 31 is filled with a foam filling 34 , in which the hollow bodies 35 a to 35 d are embedded. The hollow bodies 35 a to 35 d are arranged at least approximately on a central axis 36 of the base body 2 of the table tennis racket 1 . The foam filling 34 preferably consists of a polyurethane foam, which is formed after the introduction of the components required to produce the polyurethane foam into the recess 31 and subsequent attachment of the grip shells to the base body 2 , so that the foam filling 34 is adapted to the shape and size of the recess 31 . Alternatively, as shown in Fig. 2B, in particular in the lower part 32 of the hollow handle 33, an opening may be provided, which allows injection of the components for producing the polyurethane foam, and after foaming of the recess 31 with closure bodies (22, 23, Fig. 2B) is closed.

In the hollow bodies 35 a to 35 d is a plurality of freely movable damping bodies in the hollow bodies 35 a to 35 d, for. B. 37 , provided for damping the mechanical vibration of the table tennis racket 1 .

Fig. 4 shows a further embodiment of a handle 9 , which has an elongated recess 20 , in the hollow body 35 a to 35 e, which are filled with a plurality of freely movable in the respective hollow body 35 a to 35 e, by means of a Adhesive strip 26 are attached to an inner surface 28 of the handle 9 .

If a recess 20 is incorporated into a conventional handle shell made of solid material, which can be done without great effort in the case of wooden or plastic handle shells, the hollow bodies 35 a to 35 e according to the invention can be arranged in the handle shell 9 evenly distributed by means of the adhesive strip 26 connected to them . As a result, conventional table tennis bats can be converted into a table tennis racket 1 according to the invention by processing the grip shells in grip shells 9 according to the invention.

Fig. 5 shows an embodiment for an inventive hollow body 11, which is filled with a plurality of freely movable in the hollow body 11 damping bodies 37th The hollow body 11 is hollow-spherical and is preferably made of plastic. The wall thickness 38 of the hollow body 11 is small in comparison to the size of the hollow body 11 , which in this exemplary embodiment is given by the outer diameter of the hollow spherical hollow body 11 . A cavity 40 is formed in the hollow body 11 , in which the damping bodies 37 can move freely. If a mechanical vibration of the table tennis racket 1 is transmitted to the hollow body 11 via the handle 14 or the hollow handle 33 , the inner wall 41 , which at the same time delimits the cavity 40 , transmits at least part of the vibration energy to the damping body 37 . For example, energy can be transmitted to the damping body 37 a in the area 42 and energy can be transmitted to the damping body 37 b in the area 43 . With the vibration energy a pulse 44 a, 44 b is transmitted to the damping body 37 a, 37 b. Since the area 42 of the inner wall 41 of the portion 43 of the inner wall 41 approximately opposite to the directions of the pulses 44 a, 44 b at least immediately after their transfer to the damping bodies 37 a, 37 b directed approximately in opposite directions. The damping bodies 37 are spherical in this exemplary embodiment and preferably consist of graphite. Graphite has the advantage that it is very soft, which ensures good energy dissipation.

The invention is not restricted to the exemplary embodiments described. In particular, the filled hollow bodies 11 can be arranged anywhere in or on the table tennis racket 1 , in particular also in or on the base body 2 . The damping body 37 can also be made of another granulate, for. B. consist of sand. The hollow body 11 can also be different, e.g. B. be cube-shaped.

Reference list

1

table tennis racket

2nd

Basic body

3rd

front

4th

back

5

Table tennis surface

6

Table tennis surface

7

Edge area

8th

Side faces

9

Grip shell

10th

Grip shell

11

Hollow body

12th

Hollow body

13

upper part

14

Handle

15

bevel

16

bevel

20th

Recess

21

Recess

22

Closure body

23

Closure body

24th

Edge area

25th

Edge area

26

Adhesive strips

27

Adhesive strips

28

Inner surface

29

Inner surface

30th

Recess

31

Total recess

32

lower part

33

Hollow handle

34

Foam filling

35

a-

35

e hollow body

36

Central axis

37

Damping body

38

Wall thickness

40

cavity

41

Interior wall

42

Area

43

Area

44

a impulse

44

b impulse

Claims (17)

1. table tennis racket ( 1 ) with a flat base body ( 2 ), which has a substantially flat front side ( 3 ) and a substantially flat back side ( 4 ), and with a handle ( 14 , 33 ) which is connected to the base body ( 2 ) is connected, characterized in that on or in the table tennis racket ( 1 ) at least one hollow body ( 11 , 12 , 35 a- 35 e) is arranged, which for damping mechanical vibrations of the table tennis racket ( 1 ) with a variety of in the Hollow body ( 11 , 12 , 35 a- 35 e) freely movable damping bodies ( 37 , 37 a- 37 d) is filled. 2. table tennis racket according to claim 1, characterized in that the wall thickness ( 38 ) of the hollow body ( 11 , 12 , 35 a- 35 e) is small in comparison to the size of the hollow body ( 11 , 12 , 35 a- 35 e). 3. table tennis racket according to claim 1 or 2, characterized in that the hollow body ( 11 , 12 , 35 a- 35 e) consists of plastic. 4. table tennis racket according to one of claims 1 to 3, characterized in that the hollow body ( 11 , 12 , 35 a- 35 e) is at least substantially hollow spherical. 5. table tennis racket according to one of claims 1 to 4, characterized in that the damping body ( 37 , 37 a- 37 d) are spherical. 6. table tennis racket according to one of claims 1 to 5, characterized in that the damping body ( 37 , 37 a- 37 d) consist of graphite. 7. table tennis racket according to one of claims 1 to 6, characterized in that the hollow body ( 11 , 12 , 35 a- 35 e) is arranged in or on the handle ( 14 , 33 ). 8. table tennis racket according to claim 7, characterized in that the handle ( 14 , 33 ) has a recess ( 20 , 21 , 30 , 31 ) in which the hollow body ( 11 , 12 , 35 a- 35 e) is arranged. 9. table tennis racket according to claim 7, characterized in that the handle ( 14 , 33 ) has an elongated recess ( 20 , 21 , 30 , 31 ) in which a plurality of hollow bodies ( 11 , 12 , 35 a- 35 e) arranged evenly distributed are. 10. table tennis racket according to claim 8 or 9, characterized in that the hollow body ( 11 , 12 , 35 a- 35 e) for gluing in the recess ( 20 , 21 , 30 , 31 ) are attached to at least one adhesive strip ( 26 ). 11. Table tennis racket according to one of claims 1 to 6, characterized in that the handle ( 14 , 33 ) has two handle shells ( 9 , 10 ) which are connected to the front ( 3 ) or the back ( 4 ) of the base body ( 2 ) are. 12. Table tennis racket according to claim 11, characterized in that at least one handle shell ( 9 , 10 ) has a recess ( 20 , 21 ) in which at least one hollow body ( 11 , 12 , 35 a- 35 e) is arranged. 13. Table tennis racket according to claim 11 or 12, characterized in that in both handle shells ( 9 , 10 ) an adhesive strip ( 26 ) is glued, on which the hollow body ( 11 , 12 , 35 a- 35 e) are arranged evenly. 14. Table tennis racket according to one of claims 11 to 13, characterized in that the base body ( 2 ) in the region of the handle ( 33 ) has a recess ( 30 ) in which at least one hollow body ( 35 a- 35 d) is arranged. 15. Table tennis racket according to one of claims 11 to 14, characterized in that the handle shells ( 9 , 10 ) and the base body ( 2 ) have interconnected recesses ( 20 , 21 , 30 ) which form a hollow handle ( 33 ) in which at least one hollow body ( 35 a- 35 d) is arranged. 16. Table tennis racket according to one of claims 8, 9 or 12 to 15, characterized in that the recess ( 20 , 21 , 30 , 31 ) has a foam filling ( 34 ) into which the hollow body or bodies ( 11 , 12 , 35 a - 35 e) are embedded. 17. Table tennis racket according to one of claims 1 to 16, characterized in that a table tennis surface ( 5 , 6 ) is applied to the flat front ( 3 ) and on the flat back ( 4 ).