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 known for example from EP 2 164 579 Bl. This has a head face comprising a striking surface, which is formed hollow and made of a fiber-reinforced plastic, and to which a shaft is formed with handle, wherein the striking surface is determined by at least one cross-stretched string, which are substantially parallel to each other ' formed on the head frame strings sections forms.
• 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 are open 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 string defining the striking surface freely accessible.
• 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.
• a set of brackets is provided, the first number of brackets with a circumferentially direction of the head frame first predetermined length, at least a second number of brackets with a circumferentially direction of the head frame second predetermined length and optionally comprising at least a third, fourth and fifth number of retaining clips having 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.
• 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 approximately 22 and 25 kg and a hard covering is approximately between see 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.
• Head frame lies, offers the advantage of a secure anchoring of the retaining bracket in the head frame.
• the fastening section of each retaining clip has longitudinal and transverse structures for positive and non-positive anchoring within the head frame
• the stirrup portion for example, either open to one side or freely accessible from one side, in particular hook-shaped, preferably oval, a longitudinal section extending into the head frame, on which transverse webs or projections are formed hook-shaped, or closed on both sides, in particular ring-shaped, the attachment portion of each support bracket is preferably embedded between two frame halves defining the head frame.
• the head frame is formed by two the frame halves defining tubular prepregs approximately at the height of the club face a double-walled circumferential approximately parallel to the club surface extending transverse web, wherein the mounting portions of the headband each defining between the double-walled crosspiece Wall sections of the two tube-like prepreg embedded and thus firmly anchored.
• the mounting portions of the headband each defining between the double-walled crosspiece Wall sections of the two tube-like prepreg embedded and thus firmly anchored.
• 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 (LI) of the first number of holding straps lies in a range of 9-11 mm and / or the first number of holding straps of the first predetermined length (LI) 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 and / or the third number of brackets of the third predetermined length (L3) is 2 to 10
• / or the fourth predetermined length (L4) of the fourth number of shrouds 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
• 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.
• 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 are rounded, whereby a wear or damage of the string is excluded in the game mode and the Spieligensehaften the racket be 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 method according to the invention comprises the following method steps:
• 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 the head frame of a ball impact device according to the invention within a production mold in cross section and on an enlarged scale;
• Embodiment of a ball impact device namely tennis racket
• 3 is a detail view of an embedded in the head frame retaining bracket in plan view.
• FIG. 4 shows a perspective, a top view and a side view of two retaining clips of different predetermined length L;
• FIG. 6 perspective of a lower part of a holding device for retaining bracket
• FIG. 9 shows a perspective view of a ball impact device with holding device located in a lower mold half after removal of an upper mold half
• FIG. 10 shows an alternative embodiment of a head frame with embedded within a transverse web semi-oval retaining clips, in cross section.
• Fig. 11 insertion devices for the positioning of the headband in a perspective view.
• FIG. 1 shows a transverse section AA through the head frame 2 of a ball impact device 1 according to the invention within a production 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 fastening sections 22 of the retaining clips 20 are respectively embedded and firmly anchored between the wall sections 42 of the two tube-like pre-pregs 4, 6 defining the double-walled transverse web 40.
• 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 - in Fig. 1, the number "2 * - , The character 14 attached for the purpose of typing corresponds to the type or length (LI to L5) of the haptic 20 in the circumferential direction of the head frame.
• the attached sign serves essentially for identification and later placement in the holding device 30.
• 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.
• At- closing takes place shaping and hardening 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 frictionally and positively 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 fabric arranged therein, which defines a Sehlag Structure 12 (formed of a plurality of intersecting string sections), as well as a club shaft 17, which includes a handle 16 and a so-called over which the shaft is connected to the frame frame.
• the heart 18, which is made up of two forked diverging webs or prepegubes 4, 6 (see Fig. 1) emanating from the shaft 17, together with the shaft 17 and the head frame 2 results in a one-piece racket 1.
• the illustrated embodiment which comprises an outwardly closed hollow profile, consists of a suitable material for the intended application of a sports equipment, for example, fiber-reinforced plastic.
• the striking surface 12 is formed by a string 8 (see Fig. 3), which is held at the head frame 2 under a predetermined tension, usually the string is attached to the frame by means of a tensioning device and tensioned.
• the striking surface 12 has a checkerboard-like covering pattern consisting essentially of identical squares.
• the aim of a manufactured racket according to the invention is a high degree of accuracy in the positioning of the holding bracket 20 (see 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 a retaining clip 20 embedded in the head frame 2.
• a lateral gap “S” is defined between the retaining clip 20 and the head frame 2.
• the fastening section 22 anchored within the head frame 2 and firmly anchored in the head frame 2 is indicated accordingly spans the two ends of the protruding from the head frame bracket portion 24 of the retaining clip 20.
• the bracket has in particular, but not exclusively, in the region of the end-side rounded corners 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 having different predetermined length LI and LS.
• 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 shark hoop 20, an end view with a frontally attached typing mark "2 * and a top view of this shark hoop 20.
• the plan view shows a symmetry line 47 and the rounded corners 29 of the hoop section 24 (see FIG ).
• At an intersection of the longitudinal and transverse structure 26, 27 of the attachment portion 22 of the Haitebügels 20 is attached for the purpose of typing character 14 - here number "T - provided.
• the character 14 attached for the purpose of typing indicates the type or length LI, etc. of a shark hoop 20.
• the attached sign 14 essentially serves for identification and later processing in a positioning and holding device 30 (see Fig. 7).
• the longitudinal and transverse structures 26, 27 of the fastening section 22 see Fig.
• the Haitebügels 20 in the head frame are used for non-positive and positive anchoring of the Haitebügels 20 in the head frame and are in terms of their shape on the material of the plastic used, in particular a prepreg used for use , and its wall thickness optimized and tuned. In essence, it is important that the plastic rests positively on the outside of the Haitebügels 20, without voids or gas bubbles. For this purpose, the pressure during inflation of the prepreg tube must be selected together with the curing temperature used such that this is ensured. Furthermore, 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 retaining clips 20.
• compressed air inlets 54 are provided, via which the prepreg tubes 4, 6 (see FIG Manufacturing process can be inflated.
• 9 shows a perspective view of a still to be demoulded, but essentially finished ball impact device 1, with head frame 2, heart 18 and shaft 17 with handle 16 and the headband 2 firmly anchored holding brackets 20th
• FIG. 10 is an alternative embodiment for a retaining bow embedded within a transverse web 40 of the head frame 2! 23 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 FIGS. 1 to 8.
• Fig. 11 an example of an insertion device 44 is shown by means of which the retaining clip held positionally secure and introduced into the holding device 30 is, 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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• Health & Medical Sciences (AREA)
• General Health & Medical Sciences (AREA)
• Physical Education & Sports Medicine (AREA)
• Chemical & Material Sciences (AREA)
• Engineering & Computer Science (AREA)
• Materials Engineering (AREA)
• Golf Clubs (AREA)
• Purses, Travelling Bags, Baskets, Or Suitcases (AREA)

Priority Applications (4)

Applications Claiming Priority (2)

Publications (1)

Family

ID=53284271

Family Applications (1)

Country Status (6)

Citations (5)

Family Cites Families (7)

• 2014
  • 2014-07-29 DE DE102014110656.3A patent/DE102014110656A1/de not_active Withdrawn
• 2015
  • 2015-06-05 JP JP2017525675A patent/JP2017523894A/ja active Pending
  • 2015-06-05 CN CN201580040672.8A patent/CN106794369A/zh active Pending
  • 2015-06-05 WO PCT/EP2015/062544 patent/WO2016015906A1/de active Application Filing
  • 2015-06-05 US US15/327,930 patent/US20170203163A1/en not_active Abandoned
  • 2015-06-05 EP EP15726970.5A patent/EP3174610B1/de not_active Not-in-force

Patent Citations (5)

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