Patent Publication Number: US-2023149785-A1

Title: Paddle racket

Description:
BACKGROUND OF THE INVENTION 
     Field of the Invention 
     The present invention relates to a paddle racket. 
     Description of the Prior Art 
     In order to maintain posture and physical health, various sports have become an indispensable part of people&#39;s daily life. When performing various sports, it is necessary to use or be equipped with different corresponding sports equipment. 
     For example, a variety of ball sports use rackets to play. Examples of such rackets include tennis racket, squash racket, badminton racket, and cricket racket, etc. A racket includes a striking portion and a handle. The striking portion includes a frame body and a striking member (such as a plate, net wire or the like) disposed with the frame body. If the striking member is of considerable thickness and solid structure, it requires a large amount of raw materials (plastic, wood, metal, etc.) for producing the racket, which increases the production cost and causes a heavy weight of the racket unfavorable for play. 
     The present invention is, therefore, arisen to obviate or at least mitigate the above-mentioned disadvantages. 
     SUMMARY OF THE INVENTION 
     The main object of the present invention is to provide a paddle racket which has sufficient structural strength and light weight so that it the paddle racket can be operated swiftly. 
     To achieve the above and other objects, a paddle racket is provided, including: a frame body, including a frame wall and a handle connected with the frame wall, the frame wall defining a receiving space; a three-dimensional web core, disposed in the receiving space and circumferentially connected to the frame wall, including a plurality of channels disposed through the three-dimensional web core in a thickness direction of the three-dimensional web core; and two striking surface portions, disposed on two opposing sides of the three-dimensional web core and connected to the frame wall, each of the two striking surface portions including a plurality of through holes, the plurality of through holes corresponding to and being in communication with the plurality of channels. 
     The present invention will become more obvious from the following description when taken in connection with the accompanying drawings, which show, for purpose of illustrations only, the preferred embodiment(s) in accordance with the present invention. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG.  1    is a stereogram of a first preferable embodiment of the present invention; 
         FIG.  2    is a breakdown drawing of the first preferable embodiment of the present invention; 
         FIG.  3    is a cross-sectional view of the first preferable embodiment of the present invention; 
         FIG.  4    is a partial enlargement of  FIG.  3   ; 
         FIG.  5    is a partial enlargement of a three-dimensional web core; 
         FIG.  6    is a cross-sectional view of a second preferable embodiment of the present invention; 
         FIG.  7    is a partial enlargement of  FIG.  6   ; 
         FIG.  8    is a cross-sectional view of a third preferable embodiment of the present invention; and 
         FIG.  9    is a partial enlargement of  FIG.  8   . 
     
    
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS 
     Please refer to  FIGS.  1  to  5    for a first preferable embodiment of the present invention. A paddle racket  1  of the present invention includes a frame body  10 , a three-dimensional web core  20  and two striking surface portions  30 . 
     The frame body  10  includes a frame wall  11  and a handle  12  connected with the frame wall  11 , and the frame wall  11  defines a receiving space  13 ; the three-dimensional web core  20  is disposed in the receiving space  13  and circumferentially connected to the frame wall  11 , and the three-dimensional web core  20  includes a plurality of channels  21  (may extend linearly, or may be defined by frames of the three-dimensional web core  20  and extend non-linearly) disposed through the three-dimensional web core  20  in a thickness direction of the three-dimensional web core  20 ; the two striking surface portions  30  is disposed on two opposing sides of the three-dimensional web core  20  and connected to the frame wall  11 , each of the two striking surface portions  30  includes a plurality of through holes  31 , the plurality of through holes  31  correspond to and are in communication with the plurality of channels  21 . Whereby, the three-dimensional web core  20  has sufficient structural strength and light weight so that the paddle racket  1  can be operated swiftly. 
     Preferably, an inner side surface of the frame wall  11  is radially concave, and an outer circumferential surface of the three-dimensional web core  20  is radially convex and connected with the inner side surface of the frame wall  11  which is radially concave, so that the three-dimensional web core  20  can be firmly connected to the frame wall  11 . In other embodiments, the inner side surface of the frame wall  11  and the outer circumferential surface of the three-dimensional web core  20  may be flat surfaces. Preferably, the outer circumferential surface of the three-dimensional web core  20  is continuously annular and enclosed, which increases connection area and combination with the frame wall  11 . 
     In this embodiment, the frame body  10  is a reinforced fiber member, the three-dimensional web core  20  further includes two side layers  22  which are opposite to each other and a framework  23  which is integrally connected with and between the two side layers  22 . The two striking surface portions  30  are reinforced fiber members and coated on the two side layers  22 , respectively. Reinforced fiber, such as glass fiber, carbon fiber or the like, is of properties of light weight and strong structure. With the two side layers  22 , the two striking surface portions  30  can be made to be more flat. The two side layers  22  may be made from fiber cloths pre-impregnated and coated on the two striking surface portions  30  after curing. Each of the two side layers  22  includes a plurality of openings  221 , the framework  23  includes a plurality of communication holes  231 , and the plurality of communication holes  231  correspond to and are in communication with the plurality of openings  221  of each of the two side layers  22 , so that the resistance due to air during operation of the paddle racket is reduced. In other embodiments, the three-dimensional web core  20  and the two striking surface portions  30  may be made from the same material and integrally formed of one piece, and thus it is easy to manufacture. 
     Preferably, the three-dimensional web core  20  is made from light hardening resin (UV light hardening resin), which provides good support and sufficient elastic deformability. Light hardening resin is hardened by light projecting on predetermined regions, which is easy and quick to manufacture. For example, the light-hardening resin is contained in a container with a transparent bottom side; a platform is immersed into the light hardening resin in the container and close to the bottom side of the container; according to patterns of various cross-sections of the three-dimensional web core  20  the light is projected onto and hardens parts of the light hardening resin on the platform to form a part of the three-dimensional web core  20 . The platform is moved away from the bottom side of the container step by step, and finally the three-dimensional web core  20  is grown. The manufacturing process is simple, fast and of lower manufacturing cost. The three-dimensional web core  20  may be formed by using any of other forms of 3D printing technology. 
     Preferably, the three-dimensional web core  20  further includes a first portion  24  and a second portion  25  which is farther from the handle than the first portion the handle  12 , and the second portion  25  has a density per unit volume greater than a density per unit volume of the first portion  24 . Whereby, it has better structural strength and swing inertia near the sweet center (near the second portion  25 ) of the paddle racket  1 , which improves the swing effect and increases durability. 
     In other embodiments, the frame wall  11  further includes a partition portion  111 , the partition portion  111  extends radially form an inner side surface of the frame wall  11 , and the partition portion  111  is preferably a reinforced fiber member. The three-dimensional web core  20   a  is disposed on two opposing sides of the partition portion  111 , and the three-dimensional web core  20   a  is connected to the frame wall  11  and the partition portion  111  by the adhesive material  40 . The partition portion  111  may extend continuously and diametrically across the receiving space of the frame body, the partition portion  111  includes a plurality of penetration holes ( 112 )  112 , the plurality of penetration holes  112  correspond to and are in communication with the plurality of channels  21 , the three-dimensional web core  20   a  includes a first frame body  26  and a second frame body  27  disposed at opposing sides of the partition portion  111 , the first frame body  26  and the second frame body  27  are connected to the frame wall  11  and the partition portion  111  by the adhesive material  40  (as a second embodiment shown in  FIGS.  6  and  7   ); the partition portion  111   a  may include an annular flange and annularly connected with the inner side surface of the frame wall  11 , the three-dimensional web core  20  includes a first frame body  26  and a second frame body  27  disposed at opposing sides of the partition portion  111   a , the first frame body  26  and the second frame body  27  are connected to the frame wall  11  and the partition portion  111   a  by the adhesive material  40 , the first frame body  26  and the second frame body  27  are connected by the adhesive material  40  (as a third embodiment shown in  FIGS.  8  and  9   ), and the first frame body  26  and the second frame body  27 , preferably, each include an annular recess  261 ,  271  at the peripheral portion, the partition portion  111   a  is received within the annular recesses  261 ,  271  of the first frame body  26  and the second frame body  27 , for providing flat striking surface portion and strong combination. The partition portion can increase the structural strength and paddling effect, and the first frame body and the second frame body can be separately made and assembled so that the manufacturing is convenient and fast. 
     Although particular embodiments of the invention have been described in detail for purposes of illustration, various modifications and enhancements may be made without departing from the spirit and scope of the invention. Accordingly, the invention is not to be limited except as by the appended claims.