EP3174610B1 - Ball-striking device and method for producing same - Google Patents
Ball-striking device and method for producing same Download PDFInfo
- Publication number
- EP3174610B1 EP3174610B1 EP15726970.5A EP15726970A EP3174610B1 EP 3174610 B1 EP3174610 B1 EP 3174610B1 EP 15726970 A EP15726970 A EP 15726970A EP 3174610 B1 EP3174610 B1 EP 3174610B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- head frame
- retaining brackets
- ball
- retaining
- predetermined length
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Not-in-force
Links
- 238000004519 manufacturing process Methods 0.000 title claims description 19
- 238000004873 anchoring Methods 0.000 claims description 15
- 238000000034 method Methods 0.000 claims description 12
- 239000000463 material Substances 0.000 claims description 10
- 229920002430 Fibre-reinforced plastic Polymers 0.000 claims description 5
- 239000011151 fibre-reinforced plastic Substances 0.000 claims description 5
- 239000004033 plastic Substances 0.000 claims description 4
- 229920003023 plastic Polymers 0.000 claims description 4
- 235000009854 Cucurbita moschata Nutrition 0.000 claims description 3
- 235000009852 Cucurbita pepo Nutrition 0.000 claims description 3
- 238000001816 cooling Methods 0.000 claims description 3
- 238000007493 shaping process Methods 0.000 claims description 3
- 235000020354 squash Nutrition 0.000 claims description 3
- 240000001980 Cucurbita pepo Species 0.000 claims 1
- 230000003287 optical effect Effects 0.000 claims 1
- 244000290594 Ficus sycomorus Species 0.000 description 6
- 238000003780 insertion Methods 0.000 description 4
- 230000037431 insertion Effects 0.000 description 4
- 238000010276 construction Methods 0.000 description 3
- 240000004244 Cucurbita moschata Species 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 2
- 230000006378 damage Effects 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 235000009508 confectionery Nutrition 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000007730 finishing process Methods 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 238000010409 ironing Methods 0.000 description 1
- 230000005923 long-lasting effect Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 239000011265 semifinished product Substances 0.000 description 1
Images
Classifications
-
- A—HUMAN NECESSITIES
- A63—SPORTS; GAMES; AMUSEMENTS
- A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
- A63B49/00—Stringed rackets, e.g. for tennis
- A63B49/02—Frames
- A63B49/028—Means for achieving greater mobility of the string bed
-
- A—HUMAN NECESSITIES
- A63—SPORTS; GAMES; AMUSEMENTS
- A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
- A63B49/00—Stringed rackets, e.g. for tennis
- A63B49/02—Frames
- A63B49/022—String guides on frames, e.g. grommets
-
- A—HUMAN NECESSITIES
- A63—SPORTS; GAMES; AMUSEMENTS
- A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
- A63B49/00—Stringed rackets, e.g. for tennis
- A63B49/02—Frames
- A63B49/10—Frames made of non-metallic materials, other than wood
-
- A—HUMAN NECESSITIES
- A63—SPORTS; GAMES; AMUSEMENTS
- A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
- A63B60/00—Details or accessories of golf clubs, bats, rackets or the like
- A63B60/54—Details or accessories of golf clubs, bats, rackets or the like with means for damping vibrations
-
- A—HUMAN NECESSITIES
- A63—SPORTS; GAMES; AMUSEMENTS
- A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
- A63B2209/00—Characteristics of used materials
- A63B2209/02—Characteristics of used materials with reinforcing fibres, e.g. carbon, polyamide fibres
Definitions
- the present invention relates to a ball impact device, in particular a tennis, squash or badminton rackets, comprising a head face comprising a striking surface, which is hollow and made of plastic, in particular of a fiber-reinforced plastic, and a molded handle with handle, wherein the striking surface is determined by at least one cross-stretched side, which forms substantially parallel to each other on the head frame mounted string sections, wherein the anchoring of the string sections on the head frame via brackets, which are fixed to the inside of the head frame so that they are each substantially perpendicular to Extend striking surface, whereby the clamped in the brackets ends of the string sections are laterally deflected upon impact of a ball. Furthermore, the invention relates to a method for producing such a ball impact device.
- ball impact device or “bat” for the purpose of the present invention, in particular tennis, squash or badminton rackets to be understood;
- the meaning of the term is not limited to this as such, but refers to any type of ball impact devices, which have a striking surface and the striking surface is determined by at least one cross-stretched string.
- a ball impact device of the type mentioned is for example from the EP 2 164 579 B1 known.
- This has a striking surface comprising a head frame, which is hollow and made of a fiber-reinforced plastic, and on which a shaft is formed with handle, wherein the striking surface is determined by at least one cross-tensioned string, which is substantially parallel to each other on the head frame forms attached strings sections.
- US3912267 and US 3966207 disclose a ball impact device with a head frame comprising a striking surface, the striking surface being determined by cross-tensioned strings, the anchoring of the strings to the head frame via retaining clips open to either side of the striking surface or from one of the two sides the striking surface is freely accessible for clamping the string and thus formed as a hook.
- US 7371197 discloses a ball impact device comprising a head frame comprising a striking surface, the striking surface being defined by cross-strained strings, the anchoring of the strings to the head frame via retaining clips which are open towards one of the two sides of the striking surface and thus as two openings. It is therefore an object of the present invention to provide a ball impact device and a method for its production, in which the anchoring of the string sections on the head frame via brackets, which can be arranged precisely and easily in the head frame and are also suitable for a mass production process.
- a ball impact device with the features of claim 1 and in terms of the method by the subject of claim 12. Accordingly, it is provided that a ball impact device is specified in which the headband to one of the two strings of the club face open or from one of the two strings of the club face for clamping the the striking surface defining string are freely accessible, and in which a fixing portion of the retaining clip between two defining a head frame frame halves is embedded.
- the solution according to the invention has a number of significant advantages over the ball impact devices known from the prior art.
- a covering of the ball impact device is quick and easy to make.
- a high-precision string pattern is achieved, which has excellent playability.
- the attachment portion of each retaining clip is embedded between two frame halves defining the head frame. This offers the advantage that by using prefabricated semi-finished products, a head frame can be produced quickly and easily using common means. The corresponding embedding results in a permanently durable anchoring of the retaining clip in the head frame, which withstands even high repeated loads without further ado.
- a set of brackets for anchoring the string sections on the head frame, the first number of brackets having a first predetermined length in the circumferential direction of the head frame, at least a second number of brackets with a circumferentially of the head frame second predetermined length and optionally comprises at least a third, fourth and fifth number of headband with a third, fourth and fifth predetermined length in the circumferential direction of the head frame.
- Ball impact devices usually have an elliptical shape, on the two major semi-axes starting from the center is in each case the first number of headband with the smallest predetermined length. These determine the size of the usually consisting of mostly equilateral rectangles string pattern.
- headband with different length in the circumferential direction of the head frame allow a substantially same and exact string pattern.
- the string is the only material that comes into direct contact with the ball.
- the stringing therefore decides on game characteristics such as control, spin, power, feel and comfort of the ball impact device.
- a high stringing weight guarantees more control, but requires more power; softer clothing can be used to create greater power and maximum power of the ball with less effort.
- a soft covering is approximately between 18 and 21 kg, a normal covering is between about 22 and 25 kg and a hard covering is roughly between 26 and 28 kg.
- While there are a variety of string patterns (for example, 14x16, 14x18, 16x15, 16x16, 16x17, 16x18, 16x19, 16x20, 18x18, 18x19, 18x20 and 18x21, where the first digit of the number of longitudinal strings and the second digit determines the number of cross strings ), the 16x19 and 18x20 string patterns differ in that 16x19 usually provides more power and spin, while 18x20 provides more control with longer string durability.
- Head frame sizes are often in the classes midsize ( ⁇ 97 sq inch / 625 cm 2), Midplus (98-105 sq inch / 630-675 cm 2), oversize (106-115 sq inch / 680-740 cm 2) and Super oversize (> 116 sq in / 750 cm 2 ).
- midsize ⁇ 97 sq inch / 625 cm 2
- Midplus 98-105 sq inch / 630-675 cm 2
- oversize 106-115 sq inch / 680-740 cm 2
- Super oversize > 116 sq in / 750 cm 2 .
- the number of strings and the type of clothing can vary.
- the number and used width of the headband depends on the head frame geometry and specifically adapted to this.
- the headband used according to the invention each comprise in the state attached to the head frame a protruding from this bracket section and an anchored within the head frame mounting portion.
- the outstanding bow section is used for easy and precise hooking of the string during stringing.
- the attachment portion which lies within the head frame, offers the advantage of a secure anchoring of the retaining clip in the head frame.
- the fastening section of each retaining clip has longitudinal and transverse structures for the positive and non-positive anchoring within the head frame.
- "Longitudinal and transverse structures" mean that the attachment portion z. B. has a hineinertiernden in the head frame longitudinal section, are integrally formed on the transverse webs or -vorsprünge.
- the bracket section is, for. B. either to one side open or freely accessible from one side, in particular hook-shaped, preferably oval-hook-shaped.
- the head frame is formed by two tubular prepregs defining the frame halves, which define a double-walled peripheral approximately parallel to the impact surface extending crosspiece, the mounting portions of the headband between each of the double-walled transverse web defining wall portions of the two tubular prepregs embedded and thus firmly anchored.
- a positive and positive anchoring of the headband in the head frame is obtained in a simple manner.
- the prepregs When the prepregs are inflated, they form fit against the attachment sections of the retaining clips. This form-fitting is fixed by curing, so that a long-lasting and robust anchoring of the headband in the head frame is created.
- the inner radius of the headband is in a range of 0.5 to 1.9 mm, in particular 0.5 to 1.0 mm.
- This radius is adapted to the diameter of commonly used strings, so that the clamped on the brackets ends of the string sections are deflected laterally upon impact of a ball and excessive wear due to friction of the string is avoided during the Auslenkvorgangs.
- the surface of the headband is treated on the side facing the string with a surface finishing process, which reduces the coefficient of friction of the interacting with the string surface of the headband.
- the first predetermined length (L1) of the first number of retaining clips lies in a range of 9-11 mm and / or the first number of retaining clips of the first predetermined length (L1) is 12-20, in particular 16
- / or the second predetermined length (L2) of the second number of holding straps is in a range of 10 - 11 mm and / or the second number of holding straps of the second predetermined length (L2) is 6 to 14, in particular 10
- / or the third predetermined length (L3) of the third number of brackets is in a range of 11-13 mm
- / or the third number of brackets of the third predetermined length (L3) is 2 to 10
- 6, and / or the fourth predetermined length (L4) of the fourth number of sheaths is in a range of 16 - 18 mm and / or the fourth number of sheaths in the fourth predetermined length (L4) is 2 to 8, especially 4, and / or the fifth predetermined length (LS) of the fifth
- the best possible adaptation of the clothing pattern to the shaping of the head frame is achieved in order to achieve a desired clothing pattern. Furthermore, this creates an exact, rectangular string pattern within the main beat area (sweet spot).
- the main beat area is the area of the string pattern in which the string is determined by substantially identical or equally sized string squares. Outside this range, the cross-stretched string sections each limit more or less long rectangular fields.
- the retaining clips of predetermined length are each marked with a character provided for the purpose of typing, in particular optically and / or haptically recognizable or else readable in any other readable or mechanically evaluable form character, the type of a predetermined length (LI, L2, L3; L4; L5).
- this can also be advantageous in the case of manual processing and in particular when equipping a holding device for the holding clamps, since rapid and targeted equipping of the holding device with Haitebügein provided at the respective position is made possible.
- the headband For easier positioning of the headband these are preferably first inserted into an insertion device, and then positioned together with the insertion device relative to the holding device for the headband, before subsequently the headband are each fixed in the region of their temple sections within the holding device. By inserting is avoided that the headband when fixing the same in the holding device change its predetermined position, eg slip.
- a lateral gap is defined between the retaining clip and the head frame, the width of this gap being in the range from 1.0 to 2.0 mm, in particular in a range from 1.5 to 1.7 mm.
- This gap allows a lateral clamping of the string and is dimensioned so that the string can be easily hooked to the strap section of the headband.
- the ends of the headband, over which the striking surface defining string is deflected in each case, are rounded, whereby a wear or damage of the string is excluded in the game mode and the playing characteristics of the racket are further improved.
- a method for producing a ball impact device in which the headband relative to a mold, within which a head frame of a ball impact device is made, are positioned so that the mounting portions of the headband in the manufacture of Head frame in these protrude and be enclosed by the material thereof.
- a method for producing a ball impact device offers the advantage of a quick and easy manufacturability of a head frame with anchored in this bracket.
- the head frame can be made of injection-molded, but in particular also using a fiber-reinforced plastic.
- the holding device ensures that the headband keep its intended positions relative to the head frame to be produced. Committee in the manufacturing process is thus largely avoided.
- the predetermined position and orientation of the headband are always ensured compared to the prior art. Particularly helpful in this context is the placement of a loading device with brackets, by means of a secure and accurate positioning of the headband within the aforementioned holding device is possible without the risk that when fixing the headband in the holding device, the headband change its position.
- a method for producing a ball impact device in which the frame, which consists of head frame with brackets, and shaft with handle and Heart exists, is manufactured in a procedure.
- Fig. 1 shows a cross-section AA through the head frame 2 of a ball impact device 1 according to the invention within a manufacturing mold.
- a headband 20 between two halves 4, 6 of a head frame 2 is embedded.
- the head frame 2 is formed by two frame halves 4, 6 respectively of two tubular prepregs 4, 6.
- the section shows a double-walled circumferential transverse to the impact surface 12 approximately transverse web 40.
- the headband 20 is held for positioning between a on the upper holding tool 34 and a lower holding tool 32.
- the holding device 30 serves the positionally correct holding of the headband (s) 20 between an upper 52 and a lower 50 head frame shape such that the headband 20 with its mounting portions 22 in a region between the two prepreg tubes 4, 6 are included.
- the two prepreg tubes 4, 6 are then formed under pressure and heat supply between an upper mold 52 and a lower mold 50 and cured.
- the mounting portions 22 of the headband 20 are each embedded between the double-walled transverse web 40 defining wall portions 42 of the two tubular prepregs 4, 6 and firmly anchored.
- the two wall sections 42 of the two prepregs 4, 6 merge in the production of the head frame to a cross-piece material 40 of uniform material, while the fastening portions 22 of the headband are firmly embedded and anchored in this cross-web 40 then uniform material.
- each headband 20 has a mounting portion 22 embedded in the head frame 2.
- the attachment portion 22 consists essentially of a longitudinal structure 26 and a transverse structure 27. At the intersection of the longitudinal and transverse structure 26, 27 of each attachment portion 22 is a character attached to the purpose of typing 14 - Fig. 1 the number "2" - provided.
- the character 14 attached for the purpose of typing corresponds to the type or length (L1 to L5) of the retaining clip 20 in the circumferential direction of the head frame.
- the attached sign serves essentially for identification and later placement in the holding device 30. For this purpose, a plurality of holding clips 20 are fixed in the holding device 30 and then positioned on the first prepreg tube 4 in the first, lower head frame form 50.
- the mold 50, 52 are closed and thereby the headband 20 between the first and a second prepreg tube 4, 6 from which the head frame 2 is made, positioned.
- a shaping and curing of the prepreg tubes 4, 6 in the closed head frame shape under pressure and heat supply whereby the mounting portions 22 of the headband 20 force and form-fitting between the two formed from the prepreg tubes 4, 6 head frame halves are embedded.
- the finished manufactured head frame 2 can be removed from the mold with the anchored to the inside of the frame retaining clips 20.
- Fig. 2 shows a plan view of a ball impact device 1 of an embodiment of the invention.
- the racket 1 consists essentially of the head frame 2, of the string arranged therein, which defines a striking surface 12 (formed from a plurality of intersecting string sections), and a racket shaft 17 comprising a handle 16 and a so-called heart 18 , via which the shaft is connected to the head frame.
- the heart 18, which consists of two outgoing from the shaft 17 fork-shaped diverging webs or Prepegschläuchen 4, 6 (s. Fig. 1
- the illustrated embodiment which comprises an outwardly closed hollow profile, consists of a suitable for the intended application of a sports equipment material, for example made of fiber-reinforced plastic.
- the striking surface 12 is replaced by a string 8 (s. Fig. 3 ) is formed, which is held at the head frame 2 at a predetermined voltage.
- the string is attached and tensioned by means of a tensioning device on the frame.
- the striking surface 12 has a checkerboard-like covering pattern consisting essentially of identical squares.
- the aim of a racket according to the invention produced is a high degree of accuracy in the positioning of the headband 20 (s. Fig. 1 ), so that the aforementioned string pattern is available. Outside the main striking area 13, the string pattern deviates from the checkerboard shape.
- the intersecting string sections then bound more or less long rectangles.
- Fig. 3 shows an enlargement of an embedded in the head frame 2 retaining bracket 20.
- a lateral gap "S" is defined between headband 20 and head frame 2 .
- the inside of the head frame 2, firmly anchored in the head frame 2 mounting portion 22 is indicated accordingly.
- a string 8 spans the two ends of the protruding from the head frame bracket portion 24 of the retaining clip 20.
- the headband has in particular, but not exclusively, in the region of the end-side rounded edges 29. The rounded corners prevent chafing of string 8 and unintentional injury thereto by sharp edges, as is common in conventional rackets with holes in the head frame.
- This deflection surface is preferably bent in the circumferential direction of the head frame in the direction of the impact surface or in the direction away from the inside of the head frame, wherein the radius is in the range of 80-150 mm.
- Fig. 4 shows a first type of headband 20 and a fifth type of headband 20 each of different predetermined length L1 and L5.
- the different length L of the adaptation to different frame geometries which are generally elliptical in the rule, and may be different sizes. In general, this requires a larger number of holding straps of a smaller predetermined length and a smaller number of holding straps of a larger predetermined length.
- Fig. 5 shows a perspective of a retaining clip 20, an end view with a frontally attached typing character "2" and a plan view of this retaining clip 20.
- the plan view shows a line of symmetry 47 and the rounded corners 29 of the bracket portion 24 (s. Fig. 3 ).
- At an intersection of the longitudinal and transverse structure 26, 27 of the mounting portion 22 of the retaining clip 20 is a for the purpose of typing attached character 14 - here number "2" - provided.
- the character 14 attached for the purpose of typing indicates the type or length L1, etc., of a retaining clip 20.
- the attached sign 14 essentially serves for identification and later processing in a positioning and holding device 30 (see FIG. Fig. 7 ).
- the longitudinal and transverse structures 26, 27 of the attachment portion 22 (s.
- Fig. 3 serve the positive and positive anchoring of the retaining clip 20 in the head frame and are optimized and tuned with respect to their shape to the material of the plastic used, in particular a prepreg used for use hose, and its wall thickness.
- the plastic rests positively on the outside of the retaining clip 20, without voids or gas bubbles.
- the pressure during inflation of the prepreg tube must be selected together with the curing temperature used such that this is ensured.
- the aforementioned parameters must be selected accordingly, thereby the force transmission necessary for typical loads of a ball impact device between the head frame and the retaining clips 20 embedded therein is positively and positively absorbable.
- FIG. 6 and 7 show a lower holding tool 32 and an upper holding tool 34, which together form a holding device 30.
- the headband 20 are inserted in a preferred manner accurately.
- a defined number of retaining clips 20 are inserted, for example, in the lower holding tool 32 and then the upper holding tool 34 fit over it.
- the lower holding tool 32 has a plurality of threaded holes 35, whereby the upper and lower holding tool are screwed together, and the headband 20 are held against mechanical stress in a desired position.
- the holding tool may have a plurality of material recesses 38.
- Fig. 8 shows a lower mold 50 for producing a ball impact device 1 with an inserted holding device 30 with brackets 20.
- compressed air inputs 54 are provided, via which the prepreg tubes 4, 6 (s. Fig. 1 ) can be inflated in the production process of the invention.
- Fig. 9 shows a perspective view of a yet to be demoulded, but essentially finished ball impact device 1, with head frame 2, heart 18 and shaft 17 with handle 16 and the head frame 2 firmly anchored brackets 20th
- Fig. 10 an alternative embodiment for a embedded within a transverse web 40 of the head frame 2 headband 23 is shown in cross section.
- the bracket 23 is formed in cross-section semi-oval-shaped, with the longer branch with the larger radius of curvature as a mounting portion and the short branch with a smaller radius of curvature than on the inside of the head frame on this freely projecting bracket section is used.
- This bow section is freely accessible from one side of the club face, ie the clothing of the ball impact device, eg tennis racket, is made via this free access or via the gap between the free end of the bow section and the inside of the head frame facing this free end.
- the production of the above alternative is carried out in a similar manner as the production of the embodiment according to the Fig.
- FIG. 11 is still an example of an insertion device 44 shown by means of which the headband is held positionally secure and introduced into the holding device 30 so that when screwing the holding tools 32, 34, the headband 20 can not change their predetermined position.
- the insertion device 44 facilitates the positioning of the retaining clip 20 in the holding device 30.
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Description
Die vorliegende Erfindung betrifft ein Ballschlaggerät, insbesondere einen Tennis-, Squash- oder Badmintonschläger, mit einem eine Schlagfläche umfassenden Kopfrahmen, der hohl ausgebildet und aus Kunststoff, insbesondere aus einem faserverstärkten Kunststoff hergestellt ist, sowie einen daran angeformten Schaft mit Griff, wobei die Schlagfläche durch mindestens eine über Kreuz gespannte Seite bestimmt ist, welche im Wesentlichen parallel zueinander am Kopfrahmen befestigte Saitenabschnitte bildet, wobei die Verankerung der Saitenabschnitte am Kopfrahmen über Haltebügel erfolgt, die an der Innenseite des Kopfrahmens so befestigt sind, dass sie sich jeweils im Wesentlichen senkrecht zur Schlagfläche erstrecken, wodurch die in den Haltebügeln eingespannten Enden der Saitenabschnitte beim Aufprall eines Balls seitlich auslenkbar sind. Des Weiteren betrifft die Erfindung ein Verfahren zur Herstellung eines solchen Ballschlaggeräts.The present invention relates to a ball impact device, in particular a tennis, squash or badminton rackets, comprising a head face comprising a striking surface, which is hollow and made of plastic, in particular of a fiber-reinforced plastic, and a molded handle with handle, wherein the striking surface is determined by at least one cross-stretched side, which forms substantially parallel to each other on the head frame mounted string sections, wherein the anchoring of the string sections on the head frame via brackets, which are fixed to the inside of the head frame so that they are each substantially perpendicular to Extend striking surface, whereby the clamped in the brackets ends of the string sections are laterally deflected upon impact of a ball. Furthermore, the invention relates to a method for producing such a ball impact device.
Nachfolgend sollen unter dem Begriff "Ballschlaggerät" oder kurz "Schläger" für den Zweck der vorliegenden Erfindung insbesondere Tennis-, Squash- oder Badmintonschläger verstanden werden; die Bedeutung des Begriffs beschränkt sich vorliegend aber nicht auf diese als solches, sondern bezieht sich auf jede Art von Ballschlaggeräten, die eine Schlagfläche aufweisen und deren Schlagfläche durch mindestens eine über Kreuz gespannte Saite bestimmt ist.Hereinafter, the term "ball impact device" or "bat" for the purpose of the present invention, in particular tennis, squash or badminton rackets to be understood; However, the meaning of the term is not limited to this as such, but refers to any type of ball impact devices, which have a striking surface and the striking surface is determined by at least one cross-stretched string.
Ein Ballschlaggerät der eingangs genannten Art ist beispielsweise aus der
Diese Aufgabe wird erfindungsgemäß durch ein Ballschlaggerät mit den Merkmalen des Anspruchs 1 und im Hinblick auf das Verfahren durch den Gegenstand des Anspruchs 12 gelöst. Demnach ist vorgesehen, dass ein Ballschlaggerät angegeben wird, bei dem die Haltebügel zu einer der beiden Saiten der Schlagfläche hin offen bzw. von einer der beiden Saiten der Schlagfläche her zum Einspannen der die Schlagfläche definierenden Saite frei zugänglich sind, und bei dem ein Befestigungsabschnitt des Haltebügels zwischen zwei den einen Kopfrahmen definierenden Rahmenhälften eingebettet ist.This object is achieved by a ball impact device with the features of
Die erfindungsgemäße Lösung weist eine ganze Reihe wesentlicher Vorteile gegenüber dem aus dem Stand der Technik bekannten Ballschlaggeräten auf. So wird durch die zu einer der beiden Seiten der Schlagfläche hin offenen Haltebügel bzw. dadurch dass der Haltebügel zum Einspannen der die Schlagfläche definierenden Saite frei zugänglich ist, erreicht, dass eine Bespannung des Ballschlaggerätes schnell und einfach herzustellen ist. Darüber hinaus wird ein hoch präzises Bespannungsmuster erreicht, welches hervorragende Spieleigenschaften aufweist. Der Befestigungsabschnitt eines jeden Haltebügels ist zwischen zwei den Kopfrahmen definierenden Rahmenhälften eingebettet. Dies bietet den Vorteil, dass durch Verwendung von vorgefertigten Halbzeugen ein Kopfrahmen mit gängigen Mitteln schnell und einfach herstellbar ist. Durch die entsprechende Einbettung ergibt sich eine dauerhaft haltbare Verankerung des Haltebügels im Kopfrahmen, die auch hohen wiederholten Belastungen ohne weiteres widersteht.The solution according to the invention has a number of significant advantages over the ball impact devices known from the prior art. Thus, by the open to one of the two sides of the face flat headband or in that the headband for clamping the impact surface defining string is freely accessible, achieved that a covering of the ball impact device is quick and easy to make. In addition, a high-precision string pattern is achieved, which has excellent playability. The attachment portion of each retaining clip is embedded between two frame halves defining the head frame. This offers the advantage that by using prefabricated semi-finished products, a head frame can be produced quickly and easily using common means. The corresponding embedding results in a permanently durable anchoring of the retaining clip in the head frame, which withstands even high repeated loads without further ado.
Vorteilhafte Weiterbildungen sind in den Unteransprüchen angegeben.Advantageous developments are specified in the subclaims.
Demnach ist vorgesehen, dass zur Verankerung der Saitenabschnitte am Kopfrahmen ein Satz von Haltebügeln vorgesehen ist, der eine erste Anzahl von Haltebügeln mit einer in Umfangsrichtung des Kopfrahmens ersten vorbestimmten Länge, wenigstens eine zweite Anzahl von Haltebügeln mit einer in Umfangsrichtung des Kopfrahmens zweiten vorbestimmten Länge und gegebenenfalls wenigstens eine dritte, vierte und fünfte Anzahl von Haltebügeln mit einer in Umfangsrichtung des Kopfrahmens dritten, vierten und fünften vorbestimmten Länge umfasst. Ballschlaggeräte haben üblicher Weise eine Ellipsenform, auf deren beiden großen Halbachsen ausgehend vom Mittelpunkt sich jeweils die erste Anzahl von Haltebügel mit der kleinsten vorbestimmten Länge befindet. Diese bestimmen die Größe des in der Regel aus größtenteils gleichseitigen Rechtecken bestehenden Bespannungsmusters. Aufgrund der Ellipsenform des Kopfrahmens, ermöglichen Haltebügel mit in Umfangsrichtung des Kopfrahmens unterschiedlicher Länge ein im Wesentlichen gleiches und exaktes Bespannungsmuster. Gleichzeitig wird eine Anordnung aus mehreren Haltebügeln, wie sie aus
Die Saite ist das einzige Material, welches unmittelbar mit dem Ball in Berührung kommt. Die Saitenbespannung entscheidet daher über Spieleigenschaften wie Kontrolle, Spin, Power, Gefühl und Komfort des Ballschlaggeräts. Ein hohes Bespanngewicht garantiert mehr Kontrolle, erfordert aber mehr Kraft; mit einer weicheren Bespannung kann mit weniger Anstrengung eine größere Kraft und Endgeschwindigkeit (Power) des Balls erzeugt werden. Eine weiche Bespannung liegt in etwa zwischen 18 - 21 kg, eine normale Bespannung liegt in etwa zwischen 22 und 25 kg und eine harte Bespannung liegt in etwa zwischen 26 und 28 kg. Während es eine Vielzahl an Bespannungsmustern gibt (beispielsweise 14x16, 14x18, 16x15, 16x16, 16x17, 16x18, 16x19, 16x20, 18x18, 18x19, 18x20 und 18x21, wobei die erste Ziffer der Anzahl der Längssaiten und die zweite Ziffer die Anzahl der Quersaiten bestimmt), unterscheiden sich die Bespannungsmuster 16x19 und 18x20 dadurch, dass 16x19 üblicherweise mehr Power und Spin bietet, während 18x20 mehr Kontrolle bei längerer Haltbarkeit der Saiten ermöglicht.The string is the only material that comes into direct contact with the ball. The stringing therefore decides on game characteristics such as control, spin, power, feel and comfort of the ball impact device. A high stringing weight guarantees more control, but requires more power; softer clothing can be used to create greater power and maximum power of the ball with less effort. A soft covering is approximately between 18 and 21 kg, a normal covering is between about 22 and 25 kg and a hard covering is roughly between 26 and 28 kg. While there are a variety of string patterns (for example, 14x16, 14x18, 16x15, 16x16, 16x17, 16x18, 16x19, 16x20, 18x18, 18x19, 18x20 and 18x21, where the first digit of the number of longitudinal strings and the second digit determines the number of cross strings ), the 16x19 and 18x20 string patterns differ in that 16x19 usually provides more power and spin, while 18x20 provides more control with longer string durability.
Kopfrahmengrößen liegen häufig in den Klassen Midsize (< 97 sq inch / 625 cm2), Midplus (98-105 sq inch / 630-675 cm2), Oversize (106-115 sq inch / 680-740 cm2) und Super Oversize (>116 sq inch / 750 cm2). Entsprechend der Kopfrahmengröße können die Anzahl der Saiten und die Art der Bespannung variieren. Im Sinne der Erfindung ist die Anzahl und verwendete Breite der Haltebügel von der Kopfrahmengeometrie abhängig und speziell auf diese angepasst.Head frame sizes are often in the classes midsize (<97 sq inch / 625 cm 2), Midplus (98-105 sq inch / 630-675 cm 2), oversize (106-115 sq inch / 680-740 cm 2) and Super oversize (> 116 sq in / 750 cm 2 ). Depending on the head frame size, the number of strings and the type of clothing can vary. For the purposes of the invention, the number and used width of the headband depends on the head frame geometry and specifically adapted to this.
Vorzugsweise umfassen die erfindungsgemäß verwendeten Haltebügel jeweils im am Kopfrahmen befestigten Zustand einen aus diesem herausragenden Bügelabschnitt und einen innerhalb des Kopfrahmens verankerten Befestigungsabschnitt. Der herausragende Bügelabschnitt dient dem leichten und präzisen Einhaken der Saite beim Bespannen. Der Befestigungsabschnitt welcher innerhalb des Kopfrahmens liegt, bietet den Vorteil einer sicheren Verankerung des Haltebügels im Kopfrahmen.Preferably, the headband used according to the invention each comprise in the state attached to the head frame a protruding from this bracket section and an anchored within the head frame mounting portion. The outstanding bow section is used for easy and precise hooking of the string during stringing. The attachment portion which lies within the head frame, offers the advantage of a secure anchoring of the retaining clip in the head frame.
Um die Verankerung des Befestigungsabschnitts und damit die Belastbarkeit des Haltebügels weiter zu verbessern, weist der Befestigungsabschnitt eines jeden Haltebügels Längs- und Querstrukturen zur form- und kraftschlüssigen Verankerung innerhalb des Kopfrahmens auf. "Längs- und Querstrukturen" bedeuten, dass der Befestigungsabschnitt z. B. einen sich in den Kopfrahmen hineinerstreckenden Längsabschnitt aufweist, an den Querstege oder -vorsprünge angeformt sind. Der Bügelabschnitt ist, z. B. entweder zu einer Seite hin offen bzw. von einer Seite her frei zugänglich, inbesondere hakenförmig, vorzugsweise oval-hakenförmig.In order to further improve the anchoring of the fastening section and thus the load capacity of the retaining clip, the fastening section of each retaining clip has longitudinal and transverse structures for the positive and non-positive anchoring within the head frame. "Longitudinal and transverse structures" mean that the attachment portion z. B. has a hineinerstreckenden in the head frame longitudinal section, are integrally formed on the transverse webs or -vorsprünge. The bracket section is, for. B. either to one side open or freely accessible from one side, in particular hook-shaped, preferably oval-hook-shaped.
Der Kopfrahmen ist durch zwei die Rahmenhälften definierende schlauchförmige Prepregs gebildet, die etwa auf Höhe der Schlagfläche einen doppelwandig umlaufenden sich etwa parallel zur Schlagfläche erstreckenden Quersteg definieren, wobei die Befestigungsabschnitte der Haltebügel jeweils zwischen den den doppelwandigen Quersteg definierenden Wandabschnitten der beiden schlauchartigen Prepregs eingebettet und somit fest verankert sind. Dadurch wird auf einfache Weise ein kraft- und formschlüssige Verankerung der Haltebügel im Kopfrahmen erhalten. Beim Aufblasen der Prepregs legen sich diese formschlüssig an den Befestigungsabschnitten der Haltebügel an. Dieser Formschluss wird durch das Aushärten fixiert, sodass eine langlebige und widerstandsfähige Verankerung der Haltebügel im Kopfrahmen entsteht.The head frame is formed by two tubular prepregs defining the frame halves, which define a double-walled peripheral approximately parallel to the impact surface extending crosspiece, the mounting portions of the headband between each of the double-walled transverse web defining wall portions of the two tubular prepregs embedded and thus firmly anchored. As a result, a positive and positive anchoring of the headband in the head frame is obtained in a simple manner. When the prepregs are inflated, they form fit against the attachment sections of the retaining clips. This form-fitting is fixed by curing, so that a long-lasting and robust anchoring of the headband in the head frame is created.
Es hat sich spieltechnisch als vorteilhaft erwiesen, wenn der Innen-Radius der Haltebügel in einem Bereich von 0,5 bis 1,9 mm, insbesondere 0,5 bis 1,0 mm liegt. Dieser Radius ist an den Durchmesser üblicherweise verwendeter Saiten angepasst, sodass die an den Haltebügeln eingespannten Enden der Saitenabschnitte beim Aufprall eines Balls seitlich auslenkbar sind und eine zu starke Abnutzung infolge von Reibung der Saite während des Auslenkvorgangs vermieden wird. Dazu ist auch denkbar, dass die Oberfläche der Haltebügel an der der Saite zugewandten Seite mit einem Oberflächenveredelungsverfahren behandelt wird, welches den Reibkoeffizienten der mit der Saite zusammenwirkenden Oberfläche der Haltebügel reduziert.It has proven technically advantageous when the inner radius of the headband is in a range of 0.5 to 1.9 mm, in particular 0.5 to 1.0 mm. This radius is adapted to the diameter of commonly used strings, so that the clamped on the brackets ends of the string sections are deflected laterally upon impact of a ball and excessive wear due to friction of the string is avoided during the Auslenkvorgangs. For this purpose, it is also conceivable that the surface of the headband is treated on the side facing the string with a surface finishing process, which reduces the coefficient of friction of the interacting with the string surface of the headband.
In bevorzugter Weise ist vorgesehen, dass die erste vorbestimmte Länge (L1) der ersten Anzahl von Haltebügeln in einem Bereich von 9 - 11 mm liegt und/oder die erste Anzahl von Haltebügeln der ersten vorbestimmten Länge (L1) 12 bis 20, insbesondere 16 beträgt, und/oder die zweite vorbestimmte Länge (L2) der zweiten Anzahl von Haltebügeln in einem Bereich von 10 - 11 mm liegt und/oder die zweite Anzahl von Haltebügeln der zweiten vorbestimmten Länge (L2) 6 bis 14, insbesondere 10 beträgt, und/oder die dritte vorbestimmte Länge (L3) der dritten Anzahl von Haltebügeln in einem Bereich von 11 - 13 mm liegt und/oder die dritte Anzahl von Haltebügeln der dritten vorbestimmten Länge (L3) 2 bis 10, insbesondere 6 beträgt, und/oder die vierte vorbestimmte Länge (L4) der vierten Anzahl von Haitebügein in einem Bereich von 16 - 18 mm liegt und/oder die vierte Anzahl von Haitebügein der vierten vorbestimmten Lange (L4) 2 bis 8, insbesondere 4 beträgt, und/oder die fünfte vorbestimmte Länge (LS) der fünften Anzahl von Haltebügeln in einem Bereich von 20 - 22 mm liegt und/oder die fünfte Anzahl von Haltebügeln der fünften vorbestimmten Länge (L5) 1 bis 4, insbesondere 2 beträgt. Durch derart geformte Haltebügel wird zum Erreichen eines gewünschten Bespannungsmusters eine bestmögliche Anpassung des Bespannungsmusters an die Formgebung des Kopfrahmens, welcher i.d.R. mehr oder weniger ausgeprägt ellipsenförmig ausgebildet sein kann, erreicht. Ferner wird dadurch ein exaktes, rechteckiges Bespannungsmuster innerhalb des Hauptschlagbereichs (Sweet-Spot) erzeugt. Der Hauptschlagbereich ist der Bereich des Bespannungsmusters, bei welchem die Bespannung durch im Wesentlichen identische bzw. gleichermaßen bemessene Saiten-Quadrate bestimmt ist. Außerhalb dieses Bereichs begrenzen die über Kreuz gespannten Saitenabschnitte jeweils mehr oder weniger lange Rechteckfelder.In a preferred manner, it is provided that the first predetermined length (L1) of the first number of retaining clips lies in a range of 9-11 mm and / or the first number of retaining clips of the first predetermined length (L1) is 12-20, in particular 16 , and / or the second predetermined length (L2) of the second number of holding straps is in a range of 10 - 11 mm and / or the second number of holding straps of the second predetermined length (L2) is 6 to 14, in particular 10, and / or the third predetermined length (L3) of the third number of brackets is in a range of 11-13 mm, and / or the third number of brackets of the third predetermined length (L3) is 2 to 10, in particular 6, and / or the fourth predetermined length (L4) of the fourth number of sheaths is in a range of 16 - 18 mm and / or the fourth number of sheaths in the fourth predetermined length (L4) is 2 to 8, especially 4, and / or the fifth predetermined length (LS) of the fifth number of retaining clips is in a range of 20 - 22 mm and / or the fifth number of retaining clips of the fifth predetermined length (L5) is 1 to 4, in particular 2. By means of retaining brackets formed in this way, the best possible adaptation of the clothing pattern to the shaping of the head frame, which may generally be more or less pronouncedly elliptical, is achieved in order to achieve a desired clothing pattern. Furthermore, this creates an exact, rectangular string pattern within the main beat area (sweet spot). The main beat area is the area of the string pattern in which the string is determined by substantially identical or equally sized string squares. Outside this range, the cross-stretched string sections each limit more or less long rectangular fields.
Beim Herstellen eines erfindungsgemäßen Schlägers kann es, insbesondere für höhere Stückzahlen, von Vorteil sein, diesen in einem maschinellen oder teilmaschinellen Verfahren herzustellen. Dazu sind die Haltebügel vorbestimmter Länge jeweils mit einem zum Zweck der Typisierung versehenen Zeichen, insbesondere optisch und/oder haptisch erkennbaren oder auch in jeder anderen lesbaren oder maschinell auswertbaren Form lesbaren Zeichen gekennzeichnet, welches den Typ einer vorbestimmten Länge (LI; L2; L3; L4; L5) wiedergibt. Dies kann aber auch bei manueller Verarbeitung und insbesondere bei der Bestückung einer Halteeinrichtung für die Haltebügel von Vorteil sein, da eine schnelle und zielsichere Bestückung der Halteeinrichtung mit an der jeweiligen Position vorgesehenen Haitebügein ermöglicht wird. Zur erleichterten Positionierung der Haltebügel werden diese vorzugsweise zunächst in eine Einlegevorrichtung eingelegt, und dann zusammen mit der Einlegevorrichtung relativ zur Halteeinrichtung für die Haltebügel positioniert, bevor anschließend die Haltebügel jeweils im Bereich ihrer Bügelabschnitte innerhalb der Haltevorrichtung fixiert werden. Durch die Einlegevorrichtung wird vermieden, dass die Haltebügel beim Fixieren derselben in der Halteeinrichtung ihre vorbestimmte Position verändern, z.B. verrutschen.When producing a racket according to the invention, it may be advantageous, in particular for higher numbers of units, to produce this in a mechanical or semi-automatic method. For this purpose, the retaining clips of predetermined length are each marked with a character provided for the purpose of typing, in particular optically and / or haptically recognizable or else readable in any other readable or mechanically evaluable form character, the type of a predetermined length (LI, L2, L3; L4; L5). However, this can also be advantageous in the case of manual processing and in particular when equipping a holding device for the holding clamps, since rapid and targeted equipping of the holding device with Haitebügein provided at the respective position is made possible. For easier positioning of the headband these are preferably first inserted into an insertion device, and then positioned together with the insertion device relative to the holding device for the headband, before subsequently the headband are each fixed in the region of their temple sections within the holding device. By inserting is avoided that the headband when fixing the same in the holding device change its predetermined position, eg slip.
Erfindungsgemäß wird zwischen Haltebügel und Kopfrahmen ein seitlicher Spalt (S) definiert, wobei die Breite dieses Spalts im Bereich von 1,0 bis 2,0 mm, insbesondere in einem Bereich von 1,5 bis 1,7 mm, liegt. Dieser Spalt erlaubt ein seitliches Einspannen der Saite und ist so bemessen, dass die Saite zur Bespannung problemlos am Bügelabschnitt der Haltebügel eingehakt werden kann.According to the invention, a lateral gap (S) is defined between the retaining clip and the head frame, the width of this gap being in the range from 1.0 to 2.0 mm, in particular in a range from 1.5 to 1.7 mm. This gap allows a lateral clamping of the string and is dimensioned so that the string can be easily hooked to the strap section of the headband.
Ferner ist möglich, dass die Enden der Haltebügel, über die die Schlagfläche definierende Saite jeweils umgelenkt ist, abgerundet sind, wodurch eine Abnutzung oder Beschädigung der Saite im Spielbetrieb ausgeschlossen wird und die Spieleigenschaften des Schlägers weiter verbessert werden.Further, it is possible that the ends of the headband, over which the striking surface defining string is deflected in each case, are rounded, whereby a wear or damage of the string is excluded in the game mode and the playing characteristics of the racket are further improved.
Ferner ist gemäß der vorliegenden Erfindung auch vorgesehen, dass ein Verfahren zur Herstellung eines Ballschlaggeräts angegeben wird, bei dem die Haltebügel relativ zu einer Form, innerhalb der ein Kopfrahmen eines Ballschlaggeräts hergestellt wird, derart positioniert werden, dass die Befestigungsabschnitte der Haltebügel bei der Herstellung des Kopfrahmens in diesen hereinragen und vom Material desselben umschlossen werden. Ein derartiges Verfahren bietet den Vorteil einer schnellen und einfachen Herstellbarkeit eines Kopfrahmens mit in diesem verankerten Haltebügeln. Dabei kann der Kopfrahmen aus Spritzguss, aber insbesondere auch unter Verwendung eines faserverstärkten Kunststoffes hergestellt werden.Furthermore, according to the present invention, it is also provided that a method for producing a ball impact device is specified, in which the headband relative to a mold, within which a head frame of a ball impact device is made, are positioned so that the mounting portions of the headband in the manufacture of Head frame in these protrude and be enclosed by the material thereof. Such a method offers the advantage of a quick and easy manufacturability of a head frame with anchored in this bracket. In this case, the head frame can be made of injection-molded, but in particular also using a fiber-reinforced plastic.
Besonders bevorzugt ist es, wenn das erfindungsgemäße Verfahren folgende Verfahrensschritte aufweist:
- Positionierung eines ersten Prepreg-Schlauchs in einer ersten, z.B. unteren Kopfrahmenform;
- Positionierung eines zweiten Prepreg-Schlauchs in einer zweiten, z.B. oberen Kopfrahmenform;
- Positionierung einer Halteeinrichtung für die in dieser positionsgerecht gehaltenen Haltebügel zwischen oberer und unterer Kopfrahmenform derart, dass die die Befestigungsabschnitte definierenden Haltebügel mit einem Spalt zwischen dem ersten und zweiten Prepreg-Schlauch hineinragen;
- Ausformung und Härtung der Prepreg-Schläuche in der geschlossenen Kopfrahmenform unter Einbettung der Haltebügel-Befestigungsabschnitte ; und
- Entformung und Abkühlung des fertig hergestellten Kopfrahmens mit an der Rahmeninnenseite fest verankerten Haltebügeln.
- Positioning a first prepreg tube in a first, eg lower head frame shape;
- Positioning a second prepreg tube in a second, eg upper head frame shape;
- Positioning a holding device for holding in this positionally held headband between the upper and lower head frame shape such that the mounting portions defining the retaining bracket protrude with a gap between the first and second prepreg tube;
- Forming and hardening the prepreg tubes in the closed head frame shape by embedding the headband attachment portions; and
- Demolding and cooling of the finished manufactured head frame with firmly anchored to the inside frame retaining clips.
Damit lässt sich ein Ballschlaggerät mit hochpräzise angeordneten, insbesondere gleichermaßen ausgerichteten Haltebügeln zum Herstellen einer Saitenbespannung mit hervorragenden Spieleigenschaften schnell und einfach herstellen. Die Haltebügel stehen beim Aufblasen der Prepreg-Schläuche und während des Ausformvorgangs unter hoher Krafteinwirkung. Die Halteeinrichtung stellt dabei sicher, dass die Haltebügel ihre vorgesehenen Positionen relativ zum herzustellenden Kopfrahmens behalten. Ausschuss im Herstellungsprozess wird dadurch weitgehend vermieden. Die vorgegebene Position und Ausrichtung der Haltebügel sind im Vergleich zum Stand der Technik stets sichergestellt. Besonders hilfreich ist in diesem Zusammenhang noch die Bestückung einer Einlegevorrichtung mit Haltebügeln, mittels der eine sichere und genaue Positionierung der Haltebügel innerhalb der vorgenannten Halteeinrichtung möglich ist, ohne dass die Gefahr besteht, dass bei Fixierung der Haltebügel in der Halteeinrichtung die Haltebügel ihre Position verändern.This allows a ball impact device with high-precision arranged, in particular equally aligned holding straps for producing a string covering with excellent playing properties quickly and easily. The retaining clips are under the influence of high force during inflation of the prepreg tubes and during the molding process. The holding device ensures that the headband keep its intended positions relative to the head frame to be produced. Committee in the manufacturing process is thus largely avoided. The predetermined position and orientation of the headband are always ensured compared to the prior art. Particularly helpful in this context is the placement of a loading device with brackets, by means of a secure and accurate positioning of the headband within the aforementioned holding device is possible without the risk that when fixing the headband in the holding device, the headband change its position.
Um ein Ballschlaggerät mit Kopfrahmen und darin angeordneten Haltebügeln, Schaft mit Griff und einem dazwischen angeordneten Herz herzustellen, ist ferner vorgesehen, dass ein Verfahren zur Herstellung eines Ballschlaggeräts angegeben wird, bei dem der Rahmen, welcher aus Kopfrahmen mit Haltebügeln, sowie Schaft mit Griff und Herz besteht, in einem Verfahrensgang hergestellt wird.In order to produce a ball impact device with head frame and arranged therein headband, handle with a handle and a heart arranged therebetween, it is further provided that a method for producing a ball impact device is specified, in which the frame, which consists of head frame with brackets, and shaft with handle and Heart exists, is manufactured in a procedure.
Weitere Einzelheiten und Vorteile der Erfindung sollen nun anhand eines in der Zeichnung dargestellten Ausführungsbeispiels näher erläutert werden.Further details and advantages of the invention will now be explained in more detail with reference to an embodiment shown in the drawing.
Es zeigen:
- Fig. 1:
- den Kopfrahmen eines erfindungsgemäßen Ballschlaggeräts innerhalb einer Herstellungsform im Querschnitt und vergrößerten Maßstab;
- Fig. 2:
- eine Draufsicht auf ein erfindungsgemäß ausgebildetes Ausführungsbeispiel eines Ballschlaggerätes, nämlich Tennisschlägers;
- Fig. 3:
- eine Detailansicht eines in den Kopfrahmen eingebetteten Haltebügels in Draufsicht;
- Fig. 4:
- jeweils eine Perspektive, eine Drauf- und eine Seitenansicht zweier Haltebügel unterschiedlich vorbestimmter Länge L;
- Fig. 5:
- eine vergrößerte Ansicht (perspektivisch, Draufsicht, Seitenansicht) eines exemplarischen Haltebügels gemäß
Fig. 4 ; - Fig. 6:
- Perspektive eines unteren Teils einer Halteeinrichtung für Haltebügel;
- Fig. 7:
- Perspektive einer fertigmontierten Halteeinrichtung für Haltebügel;
- Fig. 8:
- Perspektive einer unteren Formhälfte für die Herstellung eines erfindungsgemäßen Ballschlaggerätes mit positionierter Halteeinrichtung für Haltebügel;
- Fig. 9:
- Perspektive eines in einer unteren Formhälfte liegenden Ballschlaggeräts mit Halteeinrichtung nach Abnahme einer oberen Formhälfte;
- Fig. 10
- eine alternative Ausführungsform eines Kopfrahmens mit innerhalb eines Querstegs eingebetteten halbovalförmigen Haltebügeln, im Querschnitt; und
- Fig. 11
- Einlegevorrichtungen für die Positionierung der Haltebügel in perspektivischer Ansicht.
- Fig. 1:
- the head frame of a ball impact device according to the invention within a manufacturing mold in cross-section and on an enlarged scale;
- Fig. 2:
- a plan view of an inventively designed embodiment of a ball impact device, namely tennis racket;
- 3:
- a detailed view of an embedded in the head frame retaining bracket in plan view;
- 4:
- each one perspective, a top and a side view of two headband different predetermined length L;
- Fig. 5:
- an enlarged view (perspective, top view, side view) of an exemplary retaining clip according to
Fig. 4 ; - Fig. 6:
- Perspective of a lower part of a holder for holding bracket;
- Fig. 7:
- Perspective of a fully assembled retaining device for retaining clips;
- Fig. 8:
- Perspective of a lower mold half for the production of a ball impact device according to the invention with positioned holding device for retaining bracket;
- Fig. 9:
- Perspective of lying in a lower mold half ball striking device with holding device after removal of an upper mold half;
- Fig. 10
- an alternative embodiment of a head frame with embedded within a transverse web semi-oval headband, in cross section; and
- Fig. 11
- Loading devices for the positioning of the headband in perspective view.
Es sind nur die für das unmittelbare Verständnis der Erfindung wesentlichen Elemente gezeigt.Only the elements essential for the immediate understanding of the invention are shown.
Wie schon oben erwähnt, weist jeder Haltebügel 20 einen im Kopfrahmen 2 eingebetteten Befestigungsabschnitt 22 auf. Der Befestigungsabschnitt 22 besteht im Wesentlichen aus einer Längsstruktur 26 und einer Querstruktur 27. Am Schnittpunkt der Längs- und Querstruktur 26, 27 eines jeden Befestigungsabschnitts 22 ist ein zum Zwecke der Typisierung angebrachtes Zeichen 14 - in
Es sei hier darauf hingewiesen, dass statt der vorstehend erwähnten "one-piece"-Konstruktion auch Konstruktionen mit Kopfrahmen einerseits und gesondert angeformtem Schaft und/oder Griff und/oder offenem oder geschlossenem Herz denkbar sind. Für all diese Konstruktionen sind die oben beschriebenen erfindungsgemäßen Maßnahmen anwendbar.It should be noted here that instead of the above-mentioned "one-piece" construction also constructions with head frame on the one hand and separately molded shaft and / or handle and / or open or closed heart are conceivable. For all these constructions, the above-described inventive measures are applicable.
In
- 11
- BallschlaggerätBall striker
- 22
- Kopfrahmenhead frame
- 44
- erster Prepreg-Schlauchfirst prepreg hose
- 66
- zweiter Prepreg-Schlauchsecond prepreg hose
- 88th
- gespannte Saitetight string
- 1010
- Enden der SaitenabschnitteEnds of the string sections
- 1212
- SchlagflächePlaying surface
- 1313
- HauptschlagbereichMain impact area
- 1414
- Zeichencharacter
- 1616
- GriffHandle
- 1717
- Schaftshaft
- 1818
- Herzheart
- 2020
- Haltebügelheadband
- 2121
- Innen-RadiusInside radius
- 2222
- Befestigungsabschnittattachment section
- 2323
- Haltebügelheadband
- 2424
- Bügelabschnittbow section
- 2525
- BügelinnenflächeIroning inner surface
- 2626
- Längsstrukturlongitudinal structure
- 2727
- Querstrukturtransverse structure
- 2828
- Ende des HaltebügelsEnd of the retaining clip
- 2929
- Abgerundete EckenRounded edges
- 3030
- Halteeinrichtungholder
- 3232
- unteres Haltewerkzeuglower holding tool
- 3434
- oberes Haltewerkzeugupper holding tool
- 3535
- Gewindebohrungthreaded hole
- 3636
- Verschraubungscrew
- 3838
- Materialaussparungenmaterial recesses
- 4040
- doppelwandiger Querstegdouble-walled crosspiece
- 4242
- Wandabschnittewall sections
- 4444
- Einlegevorrichtungloading device
- 4646
- Saiten-Umlenkfläche des HaltebügelsString deflection surface of the retaining clip
- 4747
- Symmetrielinie / SymmetrieebeneSymmetry line / symmetry plane
- 5050
- Unterformunder the form
- 5252
- Oberformupper mold
- 5454
- DrucklufteingängeCompressed air inputs
- SS
- Spaltgap
- L1-L5L1-L5
-
fünf unterschiedlich vorbestimmte Längen der erfindungsgemäßen Haltebügel 20, 23five different predetermined lengths of the
20, 23 according to the inventionbracket
Claims (14)
- Ball-striking device, in particular a tennis, squash or badminton racquet, with a head frame (2), encompassing a striking surface, which is hollow and made from plastic, in particular a fibre-reinforced plastic, as well as, formed thereon, a handle with a grip, wherein the striking surface (12) is determined by at least one cross-stretched string (8) which essentially forms string sections fasted essentially in parallel to each other on the head frame,
wherein anchoring of the string sections on the head frame (2) takes place by way of retaining brackets which are fastened to the inside of the head frame in such a way that they each extend essentially perpendicularly to the striking surface through which the ends (10) of the string sections clamped into the retaining brackets are laterally deflectable when stuck by a ball,
wherein the retaining brackets (20; 23) are open towards one of the two sides of the striking surface (12) and/or are freely accessible from one of the two sides of the striking surface (12) for clamping in the string defining the striking surface,
characterised in that
a fastening section (22) of each retaining bracket (20; 23) is embedded between two frame halves (4, 6) defining the head frame (2). - Ball-striking device according to claim 1 characterised in that
to anchor the string sections on the head frame a set of retaining brackets (20; 23) is provided which comprises:- a first quantity of retaining brackets with a first predetermined length (L1) in the circumferential direction of the head frame,- at least one second quantity of retaining brackets with a second predetermined length (L2) in the circumferential direction of the head frame,- possibly at least a third, fourth and fifth quantity of retaining brackets with a third, fourth and fifth predetermined length (L3, L4, L5) in the circumferential direction of the head frame. - Ball-striking device according to claim 1 or 2
characterised in that
the retaining brackets (20; 23) each comprise a bracket section (24) projecting out of the head frame (2) in the fastened state and a fastening section (22) anchored within the head frame (2). - Ball-striking device according to claim 3
characterised in that
the fastening section (22) of each retaining bracket (20) comprises longitudinal (26) and transverse structures (27) for positive and non-positive anchoring within the head frame (2). - Ball-striking device according to any one of claims 1 to 4
wherein the bracket section (24) is hook-shaped, preferably oval hook-shaped. - Ball-striking device according to any one of the preceding claims, more particularly claim 5,
characterised in that
the head frame (2) is formed of two frame halves each made of a tubular prepreg (4, 6) which at around the level of the striking surface (12) define a double-walled, circumferential transverse web (40) extending more or less in parallel to the striking surface (12), wherein the fastening sections (22) of the retaining brackets (20; 23) are each embedded and thus firmly anchored between the wall sections (42) of the two tubular prepregs (4, 6) defining the double-walled transverse web (40). - Ball-striking device according to any one of the preceding claims
characterised in that
the inner radius (21) of the retaining brackets (20; 23) is within a range of 0.5 to 1.9 mm. - Ball-striking device according to any one of the preceding claims
characterised in that
the length of each of the retaining brackets (20; 23) in the circumferential direction of the head frame is in the range 5 - 30 mm, more particularly the first predetermined length (L1) of the first quantity of retaining brackets is in a range of 9 - 11 mm and/or the first quantity of retaining brackets of the first predetermined length (L1) is 12 to 30, in particular 16 mm and/or the second predetermined length (L2) of the second quantity of retaining brackets is in a range of 10 - 11 mm and/or the second quantity of retaining brackets of the second predetermined length (L2) is 6 to 14, in particular 10 mm, and/or
the third predetermined length (L3) of the third quantity of retaining brackets is in a range of 11 - 13 mm and/or the third quantity of retaining brackets of the third predetermined length (L3) is 2 to 10, in particular 6 mm and/or
the fourth predetermined length (L4) of the fourth quantity of retaining bracket is in a range of 16 - 18 mm and/or the fourth quantity of retaining brackets of the fourth predetermined length (L4) is 2 to 8, in particular 4 mm and/or
the fifth predetermined length (L5) of the fifth quantity of retaining brackets is in a range of 20 - 22 mm and/or the fifth quantity of retaining brackets of the fifth predetermined length (L5) is 1 to 4, in particular 2 mm. - Ball-striking device according to any one of the preceding claims
characterised in that
the retaining brackets (20; 23) of predetermined length are each identified with a symbol for the purpose of typing, in particular an optical and/or haptically recognised or any other readable or machine evaluable symbol which indicates the type of retaining bracket of predetermined length (L1; L2; L3; L4; L5). - Ball-striking device according to any one of the preceding claims
characterised in that
between the free end of a retaining bracket (20; 23) and the section of the head frame (2) facing it a lateral gap is defined, wherein the width of this gap is in the range of 1.0 to 2.0 mm, in particular in a range of 1.5 to 1.7 mm. - Ball-striking device according to any one of the preceding claims
characterised in that
the face ends (29) of the retaining brackets (20; 23) via which the string (8) defining the striking surface is deflected, are rounded. - Method of producing a ball-striking device according to any one of the preceding claims wherein the retaining brackets (20) are positioned relative to a mould within which the head frame (2) of the ball-striking device is produced in such way that the fastening sections (14) of the retaining brackets (20; 23) each project into the head frame during production and are surrounded by the material thereof.
- Method according to claim 12
characterised by
the following processing steps:- positioning of a first prepreg tube (4) in a first, e.g. lower head frame mould (50);- positioning a second prepreg tube (4) in a second, e.g. upper head frame mould (52);- positioning a retaining device (30) for the retaining brackets (20; 23) held in position therein between the upper and lower head frame mould in such a way that the fastening sections of the retaining brackets (20; 23) project into an area between the first and the second prepreg tube (4; 6);- shaping and hardening of the prepreg tubes (4; 6) in the closed head frame mould with embedding of the holding bracket fastening section (22); and- cooling and removing the finished head frame from the mould with retaining brackets (20; 23) firmly anchored on the inner side of the frame. - Method according to claim 12 or 13;
in which the frame, consisting of a head frame (2) with retaining brackets (20; 23) as well as handle (17) with a grip (16) and possibly heart (18) is produced in one production process.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102014110656.3A DE102014110656A1 (en) | 2014-07-29 | 2014-07-29 | Ball impact device and method for its production |
PCT/EP2015/062544 WO2016015906A1 (en) | 2014-07-29 | 2015-06-05 | Ball-striking device and method for producing same |
Publications (2)
Publication Number | Publication Date |
---|---|
EP3174610A1 EP3174610A1 (en) | 2017-06-07 |
EP3174610B1 true EP3174610B1 (en) | 2019-06-05 |
Family
ID=53284271
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP15726970.5A Not-in-force EP3174610B1 (en) | 2014-07-29 | 2015-06-05 | Ball-striking device and method for producing same |
Country Status (6)
Country | Link |
---|---|
US (1) | US20170203163A1 (en) |
EP (1) | EP3174610B1 (en) |
JP (1) | JP2017523894A (en) |
CN (1) | CN106794369A (en) |
DE (1) | DE102014110656A1 (en) |
WO (1) | WO2016015906A1 (en) |
Family Cites Families (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3966207A (en) * | 1973-06-25 | 1976-06-29 | Pass Roger D | String system for a game racket |
US3912267A (en) * | 1974-02-13 | 1975-10-14 | Edwin J Lyon | Game racket |
JPS51133557U (en) * | 1975-04-18 | 1976-10-28 | ||
GB2172238B (en) * | 1985-03-12 | 1989-12-28 | Diversified Prod | Racquets |
US6440015B1 (en) * | 2001-08-16 | 2002-08-27 | Chen-Chung Chang | String fastener for a racket |
US6800239B2 (en) * | 2002-02-26 | 2004-10-05 | Prince Sports, Inc. | Method of manufacturing a two piece sports racquet |
ITBG20030016A1 (en) * | 2003-02-28 | 2004-09-01 | Benetton Group S P A Ora Benetton Trading Usa In | IMPROVED SPORTS RACKET STRUCTURE WITH OPENINGS ON THE FRAME |
US20060211526A1 (en) * | 2003-05-12 | 2006-09-21 | Hauptman Madeline M | Convertible racket for multiple stringing configurations |
EP1790392B1 (en) * | 2005-11-29 | 2008-10-22 | Prince Sports, Inc. | Sport racqet with insert members for anchoring strings |
US7371197B1 (en) * | 2007-05-25 | 2008-05-13 | Yuan Min An Enterprise Co., Ltd. | Safety racket |
WO2009004514A1 (en) * | 2007-07-04 | 2009-01-08 | Tec Sportmanagement Ag | Ball-striking implement |
JP2011072748A (en) * | 2009-10-02 | 2011-04-14 | Go Man | Weight regulator for golf club head regulatable according to order |
-
2014
- 2014-07-29 DE DE102014110656.3A patent/DE102014110656A1/en not_active Withdrawn
-
2015
- 2015-06-05 CN CN201580040672.8A patent/CN106794369A/en active Pending
- 2015-06-05 US US15/327,930 patent/US20170203163A1/en not_active Abandoned
- 2015-06-05 EP EP15726970.5A patent/EP3174610B1/en not_active Not-in-force
- 2015-06-05 JP JP2017525675A patent/JP2017523894A/en active Pending
- 2015-06-05 WO PCT/EP2015/062544 patent/WO2016015906A1/en active Application Filing
Non-Patent Citations (1)
Title |
---|
None * |
Also Published As
Publication number | Publication date |
---|---|
DE102014110656A1 (en) | 2016-02-04 |
WO2016015906A1 (en) | 2016-02-04 |
EP3174610A1 (en) | 2017-06-07 |
US20170203163A1 (en) | 2017-07-20 |
CN106794369A (en) | 2017-05-31 |
JP2017523894A (en) | 2017-08-24 |
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