Patent Publication Number: US-2009227403-A1

Title: Netting framework of a fiber-made racket

Description:
BACKGROUND OF THE INVENTION 
     1. Field of the Invention 
     This invention relates to the framework of a racket and particularly to the netting framework of a fiber-made racket. 
     2. Description of Related Art 
     With reference to  FIG. 1  illustrating the appearance of a conventional  racket made of a fibrous material, a racket frame  1  that is made of a fibrous material is placed in a predetermined molding tool, and the molding tool is heated in a manner of air blowing to form the frame by heat curing; after it is formed, highly concentrated piercing drill holes  2  are formed around the racket frame  1 , through which net threads correspondingly pass in order, and the threads cross vertically and horizontally inside the racket frame  1  to form a hit area  4  for achievement of the netting. However, the conventional racket netting is achieved necessarily through the quite minute drill holes  2 , so it is quite inconvenient and slow to weave with the threads. After the racket frame is all intensively drilled, the intensity of structure of the racket is significantly reduced. Further, with reference to  FIG. 2  as a sectional view illustrating the conventional racket made of the fibrous material, it is apparent that the net thread  3  passes through a random portion of the drill hole  2  to contact with the racket frame  1 , in which a contact interval A is formed, and it is apparent that two ends of the net thread  4  are limited to the drill hole  3 , thereby the flexibility of hit area  4  of the racket when hitting a ball being reduced. 
     Consequently, because of the technical defects of described above, the applicant keeps on carving unflaggingly through wholehearted experience and research to develop the present invention, which can effectively improve the defects described above. 
     SUMMARY OF THE INVENTION 
     In this invention, the netting structure of a racket made of a fibrous material is provided, comprising a racket frame and a supporting part. The racket frame is integrally formed with upper and lower racket frames that are made of the fibrous material, and internal and external penetration netting areas are integrally formed around between the upper and lower racket frames. Several supporting parts are provided in the netting area, a couple of parts that are adjacent to each other are lengthways stationary in the netting area of racket, and thus the threads of the racket pass through the couple of supporting parts and cross vertically and horizontally in the racket frame to form a hit area. With the netting areas of racket frame and the supporting parts between the areas, it is easy to pass the threads at a higher speed. The net threads pass through the supporting part to reduce the area of contact with the racket frame and thus relatively increase the flexibility of hit area of the racket when hitting a ball. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG. 1  is a view of the appearance of the netting structure of a conventional fiber-made racket; 
         FIG. 2  is a view of the appearance of the netting structure of conventional fiber-made racket; 
         FIG. 3  is a schematic view illustrating a preferred embodiment of this invention; 
         FIG. 4  is a schematic view illustrating a net thread passing through a supporting part in the preferred embodiment of this invention; 
         FIG. 5  is a sectional view of the supporting part integrated with a racket frame in the preferred embodiment of this invention; 
         FIG. 6  is a sectional view of the supporting part integrated with a racket frame in a second embodiment of this invention; 
         FIG. 7  is an exploded view of the appearance of a segment of the supporting part in a third embodiment of this invention; and 
         FIG. 8  is an exploded view of the appearance of part of the structure in a fourth embodiment of this invention. 
     
    
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS 
     Now, the present invention will be described more specifically with reference to the following embodiments. It is to be noted that the following descriptions of preferred embodiments of this invention are presented herein for purpose of illustration and description only; it is not intended to be exhaustive or to be limited to the precise form disclosed. 
     With reference to  FIG. 3  as a view of the appearance of the netting structure of a fiber-made racket in a preferred embodiment of this invention, the racket comprises a racket frame  10  and several supporting parts  20 . 
     The racket frame  10  is integrally formed with oval upper and lower racket frames  11  and  12  that are made of the fibrous material and stretches downwards separately to two sides to bring to an end and form a grasp portion  13 , and internal and external penetration netting areas  14  are integrally formed around between the upper and lower racket frames  11  and  12 . 
     The supporting part  20  may be made of a metal, an aluminum metal or a composite material, or a fibrous material. In the embodiment, a cylindrical rod is made of a fibrous material, of which upper and lower ends that are properly long are separately stationary integrally on annular sides where the upper racket frame  11  is opposite to the lower racket frame  12 , and a couple of parts that are arranged adjacent to each other are lengthways stationary in the netting area  14  of racket frame  10 , and thus the net threads  30  of the racket pass through the couple of supporting parts  20  and cross vertically and horizontally in the racket frame  10  to form a hit area  31 . 
     With reference to  FIG. 4  as a sectional view of a net thread passing through the supporting part in this invention, the supporting part  20  at the middle annular portion gradually shrink towards the center to form a trapezoidal shift lift concave  21  for the net thread  30  surround and pass through the supporting parts  20  adjacent to each other and thus fixed onto the shift limit concave  21 . The net thread  30  is kept from the supporting parts  20  at a contact distance B of which a contact area is far smaller than the conventional contact distance A as shown in  FIG. 2 . Thus, at the time of ball hitting, the flexibility of net thread  30  on the hit area  31  may increase for enhancement of hitting elasticity and power applied by the hit area  31 . 
     With reference to  FIG. 5  as a sectional view illustrating the supporting part integrated into the racket frame in this invention, the supporting parts  20  are stationary separately at protruding portions  22  and  23  that are formed at two adequate intervals around the upper and lower ends of the upper and lower racket frame  11  and  12 . The protruding portions  22  and  23  may dots or rings. In the embodiment, the protruding portions  22  and  23  are rings so that the supporting parts  20  may be placed in a formed model, and then the protruding portions  231  may be used as a basic level to fix the upper racket frame  11  with the lower racket frame  12  and enhance the intensity of formation. 
     In order to further make apparent the structural features, applied skill and manners, and expected effects according to this invention, what are applied in this invention are in detail described, and it is thus believed that this invention is thoroughly and concretely apparent, as described below. 
     The racket frame  10  that is made of the fibrous material is placed in a formed molding tool (not shown), the supporting parts  20  are separately placed in a mold cavity of a predetermined netting area  14  in the formed molding tool (not shown) and are molded, and the fibrous material in the formed molding tool (not shown) is processed in a manner of air blowing. Meanwhile, the molding tool is heated, and thus after the fibrous material is solidified, the upper and lower ends of the supporting part  20  that are properly long are separately stationary on annular sides where the upper racket frame  11  is opposite to the lower racket frame  12 , thereby an all-in-one structure being achieved. At the time of thread wearing, a couple of supporting parts  20  that are arranged adjacent to each other are lengthways stationary around in the netting area  14  of racket frame, so the net threads  30  passing through the couple of supporting parts  20  adjacent to each other pass and cross vertically and horizontally in the racket frame  10  to form the hit area  31 . Thus, thanks to the interval of distance of thread passing between the netting area  14  and the supporting parts  20 , it is smooth to pass the threads. 
     With reference to  FIG. 6  as a sectional view illustrating the supporting part integrated into the racket frame in a second embodiment of this invention, the structure and function is approximately the same as that in the preferred embodiment of this invention, and what is different is in that the supporting part  20  is a cylindrical rod made of the metallic material, of which a middle annular portion that shrinks is formed with an arc-shaped shift limit concave  24 . The supporting parts  20  are stationary separately at concave portions  25  and  26  that are formed at two adequate intervals around the upper and lower ends of the upper and lower racket frames  11  and  12 . The concave portions  25  and  26  may be dots or rings. In the embodiment, the concave portions  25  and  26  are rings so that the supporting parts  20  may be placed in a formed model, and then the protruding portions  231  may be used as a basic level to fix the upper racket frame  11  with the lower racket frame  12  and enhance the intensity of formation. 
     With reference to  FIG. 7  as a view illustrating the appearance of partial structure where the supporting part is integrated into the racket frame in a third embodiment of this invention, the structure and function is approximately the same as that in the preferred embodiment of this invention, and what is different is in that the supporting part  20  is a cylindrical rod made of a composite material, around which a damper sheath  40  made of a rubber wraps. A lengthwise cut groove  41  is formed axially at a side of the damper sheath  40  and gradually shrinks towards the radial center of annular damper sheath  40  to form an arc-shaped shift limit groove  42  so that the net thread  30  may get into the shift limit groove  42  to be fixed, and thus the damper sheath  40  is tightened to enhance the intensity of support to the hit area  31 . 
     With reference to  FIG. 8  illustrating a fourth embodiment of this invention, the structure and function is approximately the same as that in the preferred embodiment of this invention, and what is different is in that an all-in-one ornament strip  50  made of plastics are formed at a top side of the grasp portion  13  opposite to the netting area  14  of the racket frame  10 . Several clamping strips  51  are provided at a side of the supporting parts  20  corresponding to the ornament strip  40 . The clamping strips  51  are cylindrical sleeve, and a notch  511  is formed corresponding to each of the sides of supporting parts  20  for the clamping strips  51  to wedge the supporting parts  20 . The other side of the ornament strip  40  is exposed to an outside of the netting area  14 , where an advertisement typeface character or pattern blueprint may be printed. 
     Here, the features and attainable expected effects of this invention are described again below:
         1. The racket frame and supporting parts according to this invention may be integrally or separately formed for achievement of the stable structure, and the racket frame is formed with a permeable netting area to reduce the total weight of racket for relative achievement of an better effect of hitting.   2. With the intervals of distance that are formed between the netting area of racket and the supporting parts, it is smooth to pass the threads.   3. The net thread according to this invention contacts only the supporting parts between the racket frames, which reduces the area of contact with the racket frames to increase the flexibility of hit area at the time of hitting; further, the supporting parts are made of the composite material to damp the vibration.   4. The ornament strip is provided in the netting area of the racket frame according to this invention, and the advertisement typeface character or pattern blueprint may be printed on a surface of the ornament strip for achievement of the manner of advertisement.       

     While the invention has been described in terms of what is presently considered to be the most practical and preferred embodiments, it is to be understood that the invention needs not be limited to the disclosed embodiment. On the contrary, it is intended to cover various modifications and similar arrangements included within the spirit and scope of the appended claims which are to be accorded with the broadest interpretation so as to encompass all such modifications and similar structures.