DE8706273U1 - Racket for a ball game - Google Patents

Description

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DIPL4«WlRTSCH,.-INQ< f' ' &ldquor;. , T Claim* Estuary EUROPEAN PAfEMfATfORNEVS Telex ■ S 23? 03 &eacgr;&idigr;&aacgr;&iacgr;&eegr;&idigr; d Attorney S. Sfaeser ' R. Sperling > MÖllerilraO« 31 &igr;&THgr;0&Ogr;&Ogr; Some S

Robert Ries Rablstrasse Hj 8000 Munich 80

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Hits for a ball game

The innovation relates to a mallet ⁴ for a ball game, with a frame and with a handle connected to the frame via a mallet shaft -, wherein strings are stretched in the frame* with a tensioning element extending at least partially along the frame, and with a device for changing the tensioning force of the tensioning element.

From DE-GM 86 12 259 a frame with a string under tension is known, in which the frame is U-shaped in cross-section and the opening of the U points towards the center of the racket. The free legs point inwards parallel to the plane of the frame and form a support for a flexible elastic band extending inside the profile.

The end sections of the strings are attached to the flexible elastic band* A tensioning element is placed around the flexible elastic band, which, starting from the handle area,

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running around the frame, wrapped around the band like a rope, enclosing the band with the strings stretched in it. By twisting this tension element, the band is deformed in the frame, which should result in a change in the tension of the strings.

This arrangement has the disadvantage that the voltage can only be changed to a very limited extent since compressing or reducing the

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of the stringing» It may be possible* to give the racket surface a more oval shape by twisting the tension lenient, whereby the longitudinally tensioned strings experience a higher tension^ however this leads to a reduction in the cross-tensioned stringing, which is unsatisfactory.

The invention is therefore based on the object of further improving a racket of the type mentioned so that the tension of the strings can be changed as desired.

The object is achieved according to the invention in that the tensioning element has shafts or loops that can be connected to the string end sections and that interact with the associated string end sections in tension.

By stretching the waves or loops, the strings arranged between two opposing waves can be tensioned more or less as desired.

The advantage here is that support elements are arranged on the frame, on which the sections of the tensioning element extending between the shafts/loops and guided around them are supported. When tensioning,

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i.e. when the tensioning element is tightened, the loops on the support elements find a support and can therefore apply the tensioning forces to the strings. The support elements can advantageously be designed as rollers that can rotate around axes that are fixed in the frame. In another embodiment, the support elements can be designed as crossbars or projections that are integrally formed on the frame. These crossbars then connect the front and rear sides of the frame. The support elements can be designed as bolts or rivets inserted into the frame, which are used to assemble such frame halves.

A particularly advantageous embodiment is that the net into which the strings of the racket are braided can be placed in a cassette-like device and can be inserted into the frame ready for use. In this way, it is possible to take into account changing requirements for a racket and to use strings with different characteristics. It is particularly advantageous that devices for aligning the end sections of the strings into the engagement position for interaction with the tensioning element are arranged in the cassette-like device. These devices for aligning the end sections of the strings are advantageously designed in such a way that a movable holding element is provided which can be brought into engagement with the associated end section of the string _and which urges the end section or sections in the direction of the tensioning element 1(30). Such a string end section can be a loop which is placed around the holding element. The holding element is advantageously pressed into the intended position by spring force.

In a particularly advantageous embodiment,

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the box-like device consisting of an upper and a lower cover plate, the cover plates being fastened to one another by means of detachable retaining means. These retaining means can be fastened in a type of snap fastener;

be trained, I

It is advantageous if the tensioning element is made of wire or a plastic rope with high tensile strength or a;

To produce a rope consisting of a combination of these two i,Q· materials;

Another embodiment provides that the tensioning element consists at least partially of a combination of rope sections and metal sections, whereby the shaft formed in the rope section interacts with a net holding element to which several string end sections engage. The entirety of the net holding elements can be designed in such a way that they together form an auxiliary frame that stabilizes the net in one plane.

The tensioning element can consist of a metal band and/or have additional elastic elements that elastically pre-tension the wave crests facing the string end sections in the direction of these end sections. These wave crests thus protrude from the frame and make it easier to insert the net. In another embodiment, spring elements are provided in the area of the wave crests on the associated frame sections, which are designed as a screw spiral or as screw elements. These spring elements can act directly or indirectly on the tensioning element. It can be advantageous for the spring elements to act on fastening elements connected to the wave crest. The fastening element is then held in place by the spring element,

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which is supported on the inside of the frame, pushed towards the center of the racket.

An advantageous embodiment can be seen in that the spring element is a type of membrane or disc spring. I

The fastening element can be designed as a hook ring element for

be designed with the ring part surrounding the tensioning part f and the hook part facing the string end section.

In order to promote a substantially frictionless movement of the clamping element, the ring part can have a roller I on which the clamping element runs.

In another embodiment, the fastening element can have two rollers which are connected to a block by means of connecting struts and each run on an associated string end section or on the tensioning element.

Inserting the net into the frame can be facilitated by guiding the fastening element in/on the frame. This guidance can advantageously be achieved by guiding the axis of the roller in the frame so that it can move radially.

A particularly advantageous design can be seen in the fact that the fastening part is designed in two parts in a partial fastener assigned to the string end section and a partial fastener assigned to the tensioning element, which partial fasteners are detachably connected to one another. The partial fasteners are advantageously designed in such a way that the connection between them, for example by a single-piece connection or by a hook connection

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can be easily engaged with each other and also disengaged again.

In an advantageous modification, the partial fasteners can be snapped into place either directly on the tensioning element or directly on the string end sections of the net. For this purpose, such a partial fastener can have hooks whose hook openings are slightly smaller than the part with which they interact.

An advantageous embodiment can be seen in the fact that the device for changing the tensioning force of the tensioning element has a movable anchoring element that accommodates two ends of the tensioning element. This anchoring element can be secured and guided against twisting in/on the handle and can have a substantially

have a central threaded hole that interacts with a stud bolt that is firmly connected to a pivot area or the entire grip area of the handle.

I It is particularly advantageous if a section of the tensioning element is deflected at least once by 180° before being anchored in the anchoring element. This creates a kind of pulley principle, which can significantly reduce the rotational forces in the handle area.

To secure the selected rotational position or clamping position, a locking mechanism is provided, which can advantageously be a ratchet locking mechanism.

For fine tuning it is possible to use a ₃ äffr^ttlerbärenffi eccentric clamp in the area of the ¹ SS club shaft

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which acts on the clamping element. A particularly advantageous measure is that the anchoring element is connected to the eccentric clamp, so that a compact structural unit is created.

In a further embodiment, a spreading device can be provided which presses at least a portion of the clamping element from an extended position into an angled spread position. In this way, a clamping force can also be exerted on the clamping element.

It is advantageous if the spreading device acts between two opposing sections of the clamping element.

An advantageous design of the expansion element is that nuts with retaining grooves are provided which engage the associated sensing units of the clamping element and are arranged on a common threaded bolt and can be moved apart or towards each other by turning the latter.

The innovation is explained in more detail below using the examples shown in the drawing. They show:
25

Fig. IA is a plan view of a schematic representation of a tennis racket according to the invention with a tensioning element and a front part arranged in the area of the handle connected to the frame.

direction for changing the clamping force of the clamping element,

Fig. IB is a representation of a detail of the frame '35- with integrally formed support

elements,

-&dgr;&igr; Pig. 2A - 2J each show different embodiments of different fastening elements arranged between the tensioning element and the associated string end sections,

Fig. 3A and 3B each show a schematic representation of the lid halves of cassette-like devices provided according to the invention,

Fig. 3C is a plan view of a cover plate of a cassette-like device with a device for aligning the string end sections,

Fig.3D a side view of the assembled cassette-like device with upper and lower cover plate, 20

Fig. 4a is a representation of the device for alignment from Fig. 3C,

Fig. 4b a holding element of the device for alignment in side view,

Fig. 5 a cross section through the frame with support roller,

Fig. 6a a top view of a cut-out frame section with a coil spring acting on the tensioning element,

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Fig« 6A with a wave-shaped* spring« elementi

Fig. 7A-C are perspective views of the

Clamping element associated parts d£ä fastening elements , switch are each spring loaded,

iö Fig. 8 is a schematic view of a device for applying a clamping force in the handle,

Fig.9 ,
10 and 11 are views of arrangements of the

Clamping element in the area of the device for applying a clamping force:, Wherein the clamping element is turned around 180° in each case,

Fig. 12 is a schematic representation of a

Spreading device,

Fig. 13A is a plan view of an eccentric clamp arranged in the shaft area,

Fig. 13B a view of the eccentric clamp from

Fig. 13A integrated into the anchoring element,

Fig. 13c is a schematic representation of a

Frame with clamping element arranged only in the lower half,

Fig. 14 shows a further embodiment in which the

String end sections over the outer edge

of the frame into the interior,

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-&Igr;&ogr; Pig. 15 a view of a section through the

Species order according to Pig* 14^

Figs 1(6! a schematic representation of a clamping element opening consisting of

straight tension sections that are connected to each other via rope sections

Fig. 17A-C show different embodiments

of fasteners and

Fig. 18 a schematic representation of the

How a comb-like device works to push out the waves

of the clamping section.

In Fig. 1A a racket 1 for a ball game is _shown , which has a frame 2, a racket shaft 47 and a handle 7. Such a racket can be a tennis racket, a squash racket, a badminton racket or a racket for another ball game ₃ in which the ball or shuttlecock is picked up or hit away with the _strings 13 stretched in the frame.

A tensioning element 3 is arranged in the frame 2 and can be acted upon by means of a device 6 for changing the tensioning _force . In the embodiment shown in Fig. 1, the device 6 for changing the tensioning force is provided in the handle 7. In other embodiments, however, this device 6 can be arranged in the club shaft 47 or in the transition area 48 between the shaft and the frame instead of in the handle 7.

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The tension element 3 has waves 4 in the frame, whereby the wave crests 31 facing the racket center are connected to the side end sections 5 of the net 14 forming the stringing (see also Figures 6A, 6c). The tension element is guided around support elements with sections located between the wave crests 31 in such a way that it has a serpentine shape overall.

iö In the area of the device 5 for "changing the tension force, in the embodiment shown in Fig. IA, the ends of the tensioning element are accommodated in an anchoring element 54 which is provided with a threaded hole 63 and can be moved either in the direction of the racket or in the direction of the handle by means of a rotatable stud bolt 55. In this way, the tensioning element is tightened and the waves located between the supports are more or less balanced out. Flattening or smoothing the waves leads to an increase in the tension of the sides 13 attached to the wave crests 31.

In Fig. JB, a section of the frame is shown in a cut-out state in plan view. In this embodiment, the support elements 8 consist of projections or crossbars formed integrally on the frame, which are provided with a reinforcing cap 64 in their areas assigned to the tensioning element 3. If the frame of the racket is made of a high-strength material, such a reinforcing cap can be omitted. In the area between the crossbars 11, along the opposite edge, securing elements 60 are formed which prevent the tensioning element from falling out when loose. In the embodiments shown in Figures 2A, 2E, 5, 6A and 6B, the support elements consist of

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In the event that the frame consists of two frame parts arranged in a sandwich manner, the bolts or rivets connecting these frame parts can be used as supporting elements or as securing elements (not shown).

IG Fastening elements 34 are provided on each wave crest of the tensioning element 3, each of which is arranged to slide on the tensioning element. In Fig. 2A, this fastening element consists of a roller 39 in which three circumferential grooves arranged next to one another are machined. The middle groove serves to accommodate the tensioning element, the two outer grooves each to accommodate string end sections, it being noted that this embodiment is used with a double net, with two nets running parallel to the racket plane. The roller rotates about an axis 38 which can be radially displaced in guide grooves 65 arranged on the frame.

The embodiment shown in Figures 2B and 2C shows a fastening element consisting of a roller 39 or 40 assigned to the tensioning element 3 and a roller 40 assigned to the string end section 5. The respective rollers rotate about axes 38 or 40 and are combined to form a block arrangement via connecting struts 42.

In the embodiment shown in Fig. 2D, the roller 39 is replaced by a simple bracket connection between the two connecting struts 42. The embodiment shown in Fig. 2E shows a fastening element 34 that can be releasably placed on the clamping element 3. As in Fig. 2D, the fastening element has a

the string end section 5 has a roller 40, the axis of which is arranged perpendicularly to the fastening end of a hook. The hook opening 46 is slightly

smaller than the outer dimension of the clamping element, here 5

i.e. the diameter of the tensioning cable shown in this embodiment, so that the tensioning element 3 can snap into the hook opening by applying a certain amount of pressure.

A comparable design is shown in Figure 2F, but here the hook is attached directly to one end of the string.

Fig. 2G shows a fastening element 34 in the form of a simple ring. The fastening element 34 shown in Fig. 2H consists of a block with two parallel holes, one each for the tensioning element and one for a string end section.

In the embodiment shown in Fig. 2 I, the string end section 5 of the net is placed over a connecting element 49, which has a substantially semicircular receiving surface. The connecting element is in the embodiment shown by means of a

² ^ closed bracket, comparable to that in Fig. 2D, is slidably held on the clamping element 3. Instead of a bracket, a hook comparable to the embodiment in Fig. 2E can also be used.

The embodiment shown in 2J has a fastening element 34 on which two hooks 45' are formed, arranged at a distance from one another and facing the string end section 5. The hooks 45' can be mutually interlocking* but they can also

both pointing in the same direction, so that

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The embodiment as well as the embodiment variant shown in Figures 2E and 2F can be used if the net is to be replaceable.

In Figs. 3A-D and 19, various cassette-like devices 15 are shown that can accommodate such a replaceable net. As can be seen from Fig. 3D, the cassette-like device 15 essentially consists of an upper and a lower cover plate 26 or 27. In Figs. 3A and 3B, two different embodiments of such cover plates are shown; to accommodate the strings 13 of the net 14, recesses 16 are made in the cover plates assigned to one another. The cover plates are connected to one another by means of detachable holding means 28. In the embodiment shown in Fig. 3D, these holding means are designed in the manner of a snap fastener. In an embodiment not shown, the detachable holding means can be designed as a screw fastening.

In the variant according to Fig. 19, the cover plate 26 has a pressure plate 80 supported on it by springs. The opposite cover plate 27 is equipped with a plate-like recess 82 in the place of the pressure plate 80, in which the pressure plate 80 comes to rest when the cassette is assembled. Between the pressure plate 80 and the

The net 14 is inserted into the recess 82, whereby the |

Plate edge along a defined circumference line

3Q arranged pin 81 engages in loops formed by the string end sections 5 of the net. If this cassette is closed with the net inserted,

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the net is put under tension and cannot move while it is being attached to the tensioning element. The fastening elements can be arranged either on the tensioning element or on the end section of the string in such a way that the tensioning element in the form of a tensioning rope can only be hooked in.

This type of cassette can also be used in conjunction with the net structure as shown in Fig. 20, where the pins either come into contact with the inner side of the net holding elements or, in the variant shown in the left half of the frame, directly between the fastening element 34 and the net holding element 53.

As shown in the embodiment illustrated in Fig. 3C, on at least one cover plate, here on the cover plate 2*5, means 17 are provided for aligning the string end sections into the engagement position for cooperation with the tensioning element 3.

Details of this device 17 are shown in Fig. 4A and 4B. According to this embodiment, the device 17 for aligning the string end sections has a holding element 18 which is guided by a guide pin in a bore 25 in a stationary support 21 on the cover plate. A helical spring 19 is inserted between the holding element 18 and the support, which surrounds the guide pin 20. On the protruding from the bore 25 of the stationary support 21

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A locking element 24 is attached to the end of the guide pin 20 to prevent the guide pin 20 from emerging from the bore 25.

The holding element 18 is designed as a substantially flat plate which is provided with a string groove 22 on its peripheral section facing the frame. The string end section 5 enters this string groove 22. In the embodiment shown in Fig. A, two engagement recesses 22 are formed into which a fastening part, in particular a hook et»a of the embodiment according to Figs. 2E, 2F, 2J or the lower section of a fastening element 34 designed in the manner of a snap hook in Fig. 5, can engage.

In order to ensure such engagement, the wave crests 31 facing these string end sections 5 are elastically prestressed in the direction of these end sections.

Such elastic prestressing is brought about in the embodiment shown in Fig. 6b by corresponding resilient sections 30 of the tensioning element 5. This tensioning element can also be designed as a continuous metal band extending along the tensioning element.

In the embodiment shown in Fig. 6A, the spring element 33 is designed as a spiral coil spring, which is supported on an associated frame section 32 and bears against the fastening element 34.

Figures 7A - 7C show further variants of spring elements 33 in combination with a bore

.,35, of the frame)! 3 ¹ J shown.

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In the illustrated design variants, the spring element rests on the finer frame structure facing the net.

B The guide shapes of the fastening element 34 shown in Figures 7A to 7C each have a guide pin 20 which extends between the fastening point on the clamping element 3 and a partial fastener. These respective partial fasteners essentially correspond to the partial fasteners 43 shown in Figures 1A to 170, which each interact with the correspondingly designed partial fasteners 44 which are assigned to the side end section 5.

In the various embodiments, a coil spring 33 (Fig. 7A and 7C) or a disc spring 33'' (Fig. 7B) is _inserted between the frame inner side ^2f facing the racket center and the partial fastener 43 of the fastening element 34.

Those partial fasteners 43 and 44 which together form the fastening part 34 are detachably connected to one another (Fig. 17A - 17C). The connection between these partial fasteners 43, 44 is designed as a snap-in connection, the respective openings being elastically deformable for the entry of the respective associated part. For example, the partial fastener 44 from Fig. 17A is essentially arrow-shaped in cross section and pushes the two legs 67, which laterally limit the opening of the partial fastener 43, apart in a resilient manner and snaps into the legs 67 which are bent inwards like claws. The embodiment according to Fig. 17B has a hook 43 connected to the tensioning element 3 and a counter hook 44 connected to a string end section 5, which can each engage well with _one another.

The design example according to Pig. 173 shows an ä-i-ä
Receptacle formed partial fastener 43, which is fixed to the tensioning element 3; a partial fastener 44 formed as a horizontal hook engages in the receptacle, the hook lying essentially in the plane of the tensioning cable 3*

Fig. 8 shows an embodiment of the arrangement of the device 6 for changing the clamping force of the clamping element: Like a short-length profile, the ends of the clamping element are fixed in an anchoring element 54. The anchoring element 54 has a threaded hole 58 through which the stud bolt 55 passes. The stud bolt is connected to the handle 51.

The anchoring element is the
further guided in a guide 56 in the shaft 47.
Turning the handle 7 causes, depending on the direction of rotation, a forward or backward movement of the anchoring element and thus a tightening or loosening

and thus a wave formation of the clamping element 3·
locking the clamping position once selected
To ensure the handle, a releasable lock 59 is provided, which in the present embodiment
is arranged at the upper end of the handle 7 and a

Can be a ratchet lock.

In the embodiment shown in Fig. 9, I

ü the tensioning element before anchoring in the tensioning element |

deflected by 180°, whereby the deflection is carried out with the help of
pulleys 68. This embodiment also includes a locking mechanism 59, for example in the form of a ratchet mechanism, to prevent unwanted
To prevent rotation of the handle 7. In addition,
In this embodiment, a clamping device 69
at the upper part of the handle 7, which is

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Twisting of a clamping ring with wedge surfaces, which collides with a core enclosed by the ring which clamps the clamping elements 3 at a predetermined tension *

In the embodiment shown in Fig. 10, a double deflection is provided, which results in an even further reduction in the rotational force to be applied to the handle 7.

In the embodiment shown in Fig. 11, the tensioning element 3 is not led directly down to the handle 7, but forms two loops 7 in the transition area 48 between the shaft and the frame, one end of which is fixed to the frame at 69, while the other ends are guided into the frame. Rollers 72 are inserted into the loops, which are operatively connected to the device 6 for changing the tensioning force of the tensioning element 3 via a rod arrangement 71 or in another equivalent design.

Fig. 12 shows another embodiment of anchoring the ends of the tensioning element. In this variant, the ends of the tensioning element 3 are anchored in the area

2 ^V 5 48 between shaft and frame between the lower section of the frame 2 and the anchoring element 84, which is offset far up into the transition area, is guided essentially parallel. A spreading device 73 is inserted between the ends, which presses at least one section of the ends _; of the clamping element 3 from an extended position into an angled spread position. The spreading device 73 is inserted in the variant shown between two opposite sections of the clamping element and presses both sections apart. For this purpose, a threaded bolt 76 is rotatably mounted between

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two shaft sections* On the threaded bolt

76 are arranged in two patterns 75;, on which holding uteri

77 are designed to accommodate the clamping element. In the embodiment shown, the threaded bolt has a left-hand and a right-hand section, each of which has an opposing thread. Turning the threaded bolt into the corresponding position leads to a lateral movement of the nuts, which are prevented from rotating due to the contact with the end sections of the clamping element. The anchoring element 84 can be moved up and down by means of the stud bolt 55.

In the embodiments shown in Figures 13A and 13B, the clamping element 3 is clamped using an eccentric clamp 50. For this purpose, an eccentrically mounted disk 78, around which a section of the clamping element 3 is guided, can be rotated about an eccentric bolt. Once the setting has been selected, it can be secured in a suitable manner.

In the embodiment shown in Fig. 13B, the eccentric clamp 50 is arranged on the anchoring element 5^. In this way, additional fine tuning is possible. A display device is arranged on the shaft , which interacts with a measuring scale attached to the stud bolt 55. Such a measuring scale can also be used in other embodiments, whereby this measuring scale can also be attached to selected sections of the clamping element.

In the embodiment shown in Fig. 13C, the tensioning element is arranged only in a lower section of the frame, whereby the fastening elements for the net are then arranged for the upper section

of the net can be arranged directly on the frame.

In the embodiments according to Fig. 14 and Fig. 15, string end sections are placed around the outside of the frame and pulled from the outside to the inside. The reference numerals used in the figures indicate the same elements, so that the same principle is used as in the previously described examples.

The tensioning element can consist of a wire rope or a plastic rope with high tensile strength. A combination of wire and plastic is also possible, whereby the wire can be designed as a spring wire with pre-formed waves, which, when the tensioning element is relaxed, pushes the wave crests 31 in the direction of the side end sections.

The tensioning element can also consist of a metal band, which can also have spring-loaded shafts.

In Fig. 1 β and 19 two variants of similar construction are shown; in the first, the tensioning element 3' consists of rigid sections 3" and at the sections of the wave crests 31 of flexible sections. In a special net variant, these flexible sections work together with elongated net holding elements 53, which together form a kind of auxiliary frame in the relaxed state, which stabilize the net and prevent it from collapsing.

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In the embodiment shown in Fig. 16, the frame 2 that spans the net 14 is designed as a racket head 84 that can be detached from the racket shaft. For this purpose, the racket shaft has a coupling designed to accommodate a projection 85 formed on the racket head 84. The racket shaft can have frame-like receptacles that enclose the frame in the lower area and, depending on requirements, half or completely. At the projection 85 of the racket head 84, the tensioning element 2 can be brought into engagement with a connecting element 86 of the device 6 for changing the tension force. This connecting element can consist of a simple hook on which the device 6 for changing the tension force acts with a tensile force. An embodiment not shown can provide that the anchoring element is housed in the projection.

In the further variant, the net holding elements 53 are connected to the tensioning element 3 by means of fastening elements 34 fixed to them. On the left side of the frame 2, the net holding elements 53 each have a common fastening, in the variant on the right side, two fastening elements 34 are arranged on each net holding element.

In a simple embodiment of the invention, the spring elements that press the wave crests in the direction of the string end sections 5 can be omitted and instead a comb-like auxiliary tool shown in Fig. 18 can be used, which with its protruding teeth presses the wave crests in the direction of the string end sections for inserting the net.

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Claims (1)

Racket for a ball game TREASURY CLAIMS 1. Racket for a ball game, with a frame and with a hemp handle connected to the frame via a racket shaft, with strings being stretched in the frame, with at least one tensioning element extending at least partially along the frame, and with a device for changing the tensioning force of the tensioning element, characterized in that the tensioning element (3) has shafts or loops (4,4·) which can be connected to the string end sections (5) and which cooperate with the associated string end sections (5) under tension. 2.,. Racket according to claim 1, characterized in that support elements (8) are arranged on the frame (2), on which the sections (52) of the tensioning element (3) extending between the shafts/loops (4,4·) and guided around them are to be supported (Pig. I). Bavarian. PdfgiiokonlcI M0nth»n 27(J44'N2 (Bl* 70010060) iU't &iacgr; ¹ S. Racket according to claim 2, characterized in that the support elements (8) are designed as % in the frame (2) fixed axles (9) rotatable Rollers (10) are formed. (Fig. 1A;5). ■ 5 4. Racket according to claim 2, characterized in that the support elements are designed as cross members or projections (11) formed integrally on the frame (2). (Fig. IB). 10 5. Racket according to claim 2, characterized in that the support elements (8) are designed as bolts or rivets (12) inserted into the frame. ' ■ are formed. (Fig. 65)
15 6. Racket according to at least one of claims 1-5, characterized in that the strings (13) are braided to form an independent net (IM) which can be attached to the tensioning element (3). (Fig. 3C) 20 7. Racket, in particular according to claim 6, characterized in that the net (14) can be inserted into a cassette-like device (15) and can be inserted into the frame (2) ready for use. (Fig. 3A - D; IA) 8. Racket according to claim 7, characterized in that recesses (16) for receiving the strings (13) of the net (14) are formed in the cassette-like device (15). 9. Racket, in particular according to claim 7 or 8, characterized in that in the cassette-like device (15) devices 35 (17) for aligning the string end sections (5) I I 4 * 4 4 * 4 4 If 4 44 4« 44*4 4 &bull;&bull;&bull;&bull;II I« ■ « · · 4 i iilliii · . &bull; · · · 11 I it« -3- irl the engagement position for interaction with the chip element (3) are arranged (PIg ₄ 3C), 10« Racket according to at least one of claims 7 - 9j characterized in that the device (17) for aligning has a movable holding element (18) that can be brought into engagement with at least one associated string end section (5) and that urges the end sections in the direction of the tensioning element (3). (Fig. 4) Ii. Racket according to claim 10, characterized in that the holding element (18) has a guide pin (20) provided with a securing element (24) which passes through a bore (25) in a stationary support (21). (Fig. &Oacgr; * Racket according to claim Hj, characterized in that a spring (19) carried by the guide pin (20) is arranged between the holding element (18) and the support (21). (Fig. 4) 13. Racket according to at least one of claims 7-12, characterized in that the cassette-like device (15) consists of an upper and a lower cover plate (26 and 27 respectively) which can be fastened to one another by means of releasable holding means (28). (Fig. 3D)
30 14. Racket according to claim 13 , characterized in that the releasable holding means (28) are designed in the manner of a push-button fastening. +~*<UtZi2Z*^*i*äZJi*L*, (II llll t I · t lit · t t «I t · · · 15« Racket according to claims 1-3 > characterized in that the detachable holders (28) are designed as a screw fastening. 16* Racket according to at least one of claims 1-15, characterized in that the tensioning element is a wire or plastic rope with high tensile strength or a rope consisting of a combination of these two materials (Fig* 6A) 17. Racket according to at least one of claims 1-16, characterized in that the tensioning element (3) consists at least partially of a combination of rope sections ( ³¹ ) and metal band sections ( ^3M ), the shaft formed in the rope section interacting with a net holding element (53) on which several side end sections (5) engage (Fig. 16)» 18. Racket according to at least one of claims 1-15, characterized in that the tensioning element (3) consists of a metal band (30) _ä 19. Racket according to at least one of claims 1 - 18, characterized in that the wave crests (31) facing the string end sections (5) are elastically prestressed in the direction of these end sections. ;30: £0;.i racket ihachi claim 1% characterized in that the elastic prestress is brought about by corresponding spring sections of the tensioning element (5). · i I · ItI 21. Beater according to claim 19 or 20, characterized in that in the area of the ridges (31) on the associated frame sections (§2) lowering elements (33) are provided* (Pig* 6Ä) | * Racket according to claim 21, characterized in that > the spring elements (33) are designed as spiral coil or screw springs (Pig. 6A) 23«■ Racket according to claim 21 or 22, characterized in that the spring elements (33) engage directly or indirectly on the tensioning element (3). 24. Racket according to at least one of claims 19 - 23, characterized in that the spring elements (33) each engage fastening elements (3^) connected to the wave crest (31) (Fig. 6A, 7A - C) &kgr;= Racket according to claim 24, characterized in that the spring element (33) is supported on the inside of the frame ( ²¹ ) and pushes the fastening element (34) towards the racket center»(Fig. 7A-C) 26. Racket according to claim 25, characterized in that the spring element (33) is a type of diaphragm or disc spring (33A). (Fig. 7B). 27. Racket according to one of claims 24 - 26, characterized in that the fastening element (34) is designed as a hook-ring element (25). (Fig. 2B-E; 6A) * · * · tf 4 114« 4 i , if ft ·« · ··« -6- 28. Racket according to claim 27, characterized in that the hook-ring element (35) surrounds the chip element (3) with its ring part (30 ) and the hook part (37) surrounds the chip element (3) B (5). (Fig* 6A) 29* Striker according to claim 27 or 28, characterized in that the ring part has a roller (39) on which the tensioning element (3) runs. (Fig. 2B^C) 30. Racket according to one of claims 2H - 26, characterized in that the fastening element ( ³¹⁰ ) has two rollers (39, ¹⁰⁰ ) which are connected to a block ( ¹¹¹ ) by means of connecting struts (42) and each run on an associated side end section (5) or on the tensioning element (3). (Fig. 2B, 2C) 31. Racket according to at least one of claims 2k - 30, characterized in that the fastening element (3 ¹⁰ ) is guided in/on the frame (2). (Fig. 2A, 2B; 7A - 7C). 32. Racket according to claim 30 or 31, characterized in that the axis (38) of the roller (39) is guided radially movably in the frame (2). (Fig. 2A) 30: 63· -racket according to at least one of claims 2 ¹ J - 26, characterized in that^ the fastening part (34) is designed in two parts with a partial fastener (43 or 44) assigned to the side end section (5i) and a partial fastener (43 or 44) assigned to the tensioning element (3), which partial fasteners are detachably connected to one another. Fig. 17A - D) » I » ti -7- 34. Racket according to claim 33 , characterized in that the "connection between the
Partial fastening distances (43,44) a snap-in connection
is. 35· Racket according to claim 33 or 34, characterized characterized in that the partial fasteners
(43,44) directly on the clamping element
(3) or the string end sections (5) can be snapped into place
or can be hooked in. (2E, 2F, 21) f 36. Racket according to at least one of claims 33 - 35j characterized in that \ the partial fasteners (43,44) have hooks (45), \ whose hook openings{46) are slightly smaller 1 than the part with which they interact. { 37. Racket according to at least one of the claims \ 1-36, characterized by that the device for changing the clamping force \ (6) of the clamping element (3) one-movable, two ends of the I Anchoring element receiving tensioning element (3) i (54). (Fig. IA; 8) ^? 38. Racket according to claim 37 , characterized in that &eegr;&eegr; - } characterized in that the anchoring element (54) > is secured against twisting on/in the handle (7) and
and has a substantially central threaded bore (58) which is provided with a Rotating range or the entire handle area (57) for
Purpose of twisting firmly connected stud bolts (55) (Pig. IAj 8) 39- Racket according to claim 37 or 38, characterized in &rgr; gekenttzelch h*e t , 'that each" 35 if Il U t « ■· &bull; r · · Section of the tensioning element (3) is deflected at least once by 180° in the anchoring part before anchoring" (Fig. 9 - 11) IiO. Racket according to at least one of claims 37-39 , characterized in that a releasable ratchet mechanism (59) is provided to secure a clamping position (Pig.IA; 8) hl. Racket according to at least one of claims 1-36, characterized in that the anchoring element (54) can be subjected to pressure or tension in order to change the tensioning force of the tensioning element (3) (Fig. IA, 9) 15 42. Racket according to at least one of claims 1 - 41, characterized in that a lockable eccentric clamp (50) is arranged in the area of the racket shaft, with which the clamping element (3) interacts (Fig. 13A, 13B) 43. Racket according to claim 42, characterized in that the anchoring element (54) is connected to the eccentric clamp (50). (Fig. 13B) 44. Racket according to at least one of claims 1 - 43, characterized _in that a spreading device (73) is provided which at least _nn presses a section of the span element (3) from a stretched position into an angled spread position. 45, racket according to claim 44, characterized in that the spreading device (73> -9- between two opposite sections of the clamping element (3) acts _u 46. Racket according to claim 44 or 45, characterized characterized in that the expansion element (73) has nuts (75) with retaining grooves (77) which engage the associated sections of the clamping element (3) and which are arranged on a common threaded bolt (76) and can be moved apart or towards one another by turning the latter. 47. Racket according to at least one of claims 1 to 46, characterized in that at least one cover plate (26, 27) has a has a pressure plate (80) extending over at least a substantial part of the net (14) which is resiliently loaded in the direction of the other cover plate (27, 26).
20 48. Racket according to at least one of claims 1 to 47, characterized in that along a circumferential line on at least one cover plate (27, 26) there are arranged projecting pins (81) which engage in loops formed by the string end sections (5). 49. Racket according to claim 47 or 48, characterized in that the cover plate (27) opposite the pressure plate (80) has a plate-like recess (82) into which the net (14) is pressed resiliently by the pressure plate (80). 50. Racket according to at least one of claims £47 to -&Igr;&Ogr;&Igr; 49, characterized in that the cover plates (26, 27) can be connected to one another with a lever lock (83). 51. Racket according to at least one of claims 1 to 50, characterized in that the frame (2) spanning the net (14) is designed as a racket head (84) detachable from the racket shaft. 52. Racket according to claim 51, characterized in that the racket head (84) has a projection (85) serving for fastening to the racket shaft. 53. Racket according to claim 51 or 52, characterized in that the clamping element (3) at the attachment (85) can be brought into engagement with a connecting element (86) of the device (6) for changing the clamping force. «4 * 4 t 4 I* 4 t