Racket frame

Abstract

To provide a racket frame capable of reducing air resistance. [Solution] The racket frame includes a shaft 2 and a head 3, the head including an annular frame 31, a plurality of protruding structures 32 mounted on the annular frame, and a plurality of resistance reduction structures 33 between two adjacent protruding structures, the annular frame including an inner circumferential surface 312 defining a striking face space and an outer circumferential surface 313 which is the opposite surface of the inner circumferential surface, and a plurality of through holes 314 are formed therethrough which communicate with the striking face space, each protruding structure protruding from the outer circumferential surface and having two convex edge portions 321 on both the front and rear sides of the through hole, the two convex edge portions defining an open groove 322 communicating with a corresponding through hole, each resistance reduction structure protruding from the outer circumferential surface and having two side walls 331 on both the front and rear sides of the through hole, the two side walls defining a narrowed groove 332 communicating with the through hole, each narrowed groove communicating with at least one open groove and having a width smaller than that of the open groove.

Description

[Technical field]

[0001] The present invention relates to exercise equipment, and in particular to a badminton or tennis racket frame. [Background technology]

[0002] As shown in FIG. 1, a typical racket 1 includes a frame 12 that surrounds and defines a space 11, a shaft 13 connected to the frame 12, and a number of strings (not shown) that are stretched around the frame 12 and form a hitting surface in the space 11.

[0003] When tensioning the string, a common method is to insert a number of hollow plastic pegs 14 into the frame 12 and then insert the string into the plastic pegs 14 with a portion of the string wrapping around the outside of the frame 12 between adjacent plastic pegs 14. Summary of the Invention [Problem to be solved by the invention]

[0004] In the above structure, the outer ends of the plastic nails 14 protrude from the outside of the frame 12, and the outer parts of the strings are also located outside the frame 12. This increases the air resistance of the racket 1, which affects the swing of the racket 1. Furthermore, the use of the plastic nails 14 not only increases the amount of material used, but also has a negative impact on the environment, and there are areas that need to be improved.

[0005] SUMMARY OF THE PRESENT DISCLOSURE In view of the above, an object of the present invention is to provide a racket frame that can reduce air resistance. [Means for solving the problem]

[0006] The present invention includes a shaft and a head connected to the shaft, The head includes an annular frame, a plurality of protruding structures disposed on the annular frame so as to be spaced apart from one another, and a plurality of resistance reducing structures disposed on the annular frame and each located between two adjacent protruding structures, The annular frame includes an inner peripheral surface that surrounds and defines a ball-striking face space, and an outer peripheral surface that is opposite to the inner peripheral surface and surrounds the inner peripheral surface, the annular frame is formed with a plurality of through holes that are spaced apart from one another, extend from the outer peripheral surface to the inner peripheral surface, and communicate with the ball striking face space; Each of the protruding structures has two protruding edge portions protruding outward from the outer circumferential surface and positioned on both front and rear sides of several of the plurality of through holes, The two protruding portions are spaced apart from each other and define open grooves located outside the corresponding through holes and communicating with the corresponding through holes; Each of the resistance reducing structures has two side walls protruding outward from the outer circumferential surface and positioned on both front and rear sides of several of the plurality of through holes, The two side walls are spaced apart from each other to define a narrowed groove located outside the corresponding through hole and communicating with the corresponding through hole; The racket frame is characterized in that each of the narrow grooves communicates with at least one of the open grooves and has a width smaller than that of the open groove. Effect of the Invention

[0007] The racket frame of the present invention allows the strings to be directly inserted into the through holes to be tensioned, eliminating the need for plastic nails, which reduces the number of parts and is environmentally friendly. The parts of the strings located on the outer periphery are shielded by the two corresponding side walls. The design provides a resistance reduction structure at specific positions according to aerodynamics, and the width of each narrow groove is made smaller than the width of each open groove, thereby significantly reducing air resistance and avoiding any impact on the swing of the racket. [Brief description of the drawings]

[0008] [Figure 1] FIG. 1 is a perspective view showing a conventional racket. [Diagram 2] 1 is a perspective view showing an embodiment of a racket according to the present invention; [Diagram 3] FIG. 3 is a side view of the embodiment of FIG. 2. [Figure 4] FIG. 3 is a top view of the embodiment of FIG. 2. [Diagram 5] FIG. 3 is a bottom view of the embodiment of FIG. 2. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] In order to more clearly describe the objectives, technical means and advantages of the embodiments of the present invention, the following will clearly describe the technical means in the embodiments of the present invention in combination with the accompanying drawings of the embodiments of the present invention. It is clear that the described embodiments are only some embodiments of the present invention, and not all embodiments. Generally, the components of the embodiments of the present invention depicted and shown in the accompanying drawings can be arranged and designed in various different configurations. Therefore, the detailed description of the embodiments of the present invention provided in the accompanying drawings hereinafter does not constitute any limitation on the protection scope of the present invention, but only represents selected embodiments of the present invention.

[0010] Before describing the present invention in more detail, it should be noted that, where considered appropriate, reference numerals or terminal portions of reference numerals have been repeated among the figures to indicate corresponding or analogous elements, which may optionally have similar characteristics.

[0011] In describing the present invention, terms indicating orientations and positional relationships, such as "upper", "lower", "inner", "outer", "left", "right", "front", and "rear", are based on the orientations and positional relationships shown in the drawings or the orientations and positional relationships customarily placed when using the product of the present invention, for the purpose of easier and clearer description, and are not intended to teach or suggest that the corresponding apparatus or device has a specific orientation, structure or operation in a specific orientation, etc., and are not limitations on the present invention.

[0012] As shown in FIGS. 2 and 3, an embodiment of a racquet of the present invention includes a shaft 2 and a head 3 integrally connected to the shaft 2 .

[0013] In this embodiment, the shaft 2 and the head 3 are made of carbon fiber material and are connected together as one unit, but the present invention is not limited thereto and may be made of other materials and connected by other methods.

[0014] As shown in Figures 3 to 5, the head 3 includes an annular frame 31, four protruding structures 32 mounted on the annular frame 31 so as to be spaced apart from each other, two resistance reducing structures 33 mounted on the annular frame 31, and two shielding bodies 34 covered by the annular frame 31.

[0015] The annular frame 31 includes an inner circumferential surface 312 that surrounds and defines a ball striking face space 311 , and an outer circumferential surface 313 that is opposite to the inner circumferential surface 312 and surrounds the inner circumferential surface 312 .

[0016] The annular frame 31 has a plurality of through holes 314 formed therein that are spaced apart from one another, extend from the outer circumferential surface 313 to the inner circumferential surface 312 , and communicate with the ball striking surface space 311 .

[0017] In this embodiment, the diameter of each of the through holes 314 is within the range of 1.0 mm to 1.2 mm.

[0018] Each protruding structure 32 has two protruding edge portions 321 protruding outward from the outer peripheral surface 313 and positioned on both the front and rear sides (corresponding to the left and right sides in Figure 3) of several of the multiple through holes 314 (six are illustrated in Figure 3).

[0019] The two protruding edges 321 of each protruding structure 32 are spaced apart from each other to define an open groove 322 therebetween that is located outside the corresponding through hole 314 and communicates with the corresponding through hole 314 .

[0020] As shown in FIG. 3, each resistance reduction structure 33 is located between two adjacent protruding structures 32, and has two side walls 331 that protrude outward from the outer circumferential surface 313 and are located on both the front and rear sides of several (seven are illustrated in FIG. 3) of the multiple through holes 314.

[0021] Both ends of each side wall 331 are connected to two corresponding protruding portions 321, respectively.

[0022] Each resistance reducing structure 33 has two side walls 331 that are spaced apart from each other to define a narrowed groove 332 therebetween that is located outside the corresponding through hole 314 and communicates with the corresponding through hole 314 .

[0023] Each narrow groove 332 communicates with the open grooves 322 of two adjacent protruding structures 32 .

[0024] Each narrowed groove 332 is formed so that its width is smaller than that of each open groove 322 and is approximately the same as the diameter of the through-hole 314. In this embodiment, the width of each narrowed groove 332 is within the range of 1.0 mm to 1.2 mm.

[0025] In order to further reduce air resistance, an end portion of at least one open groove 322 connected to a corresponding narrowed groove 332 is formed to have a gradually decreasing width toward the corresponding narrowed groove 332, as shown in Fig. 3. In this embodiment, an end portion of all open grooves 322 connected to a corresponding narrowed groove 332 is formed to have a gradually decreasing width toward the corresponding narrowed groove 332, as shown in Fig. 3.

[0026] As shown in Figures 3 to 5, the two shields 34 are covered on the outer peripheral surface 313 of the annular frame 31 and are located at the top and bottom ends of the annular frame 31, respectively, and the shield 34 located at the bottom end is connected to the shaft 2.

[0027] As shown in Figures 4 and 5, each shield 34 is installed between two adjacent protruding structures 32 on which no resistance reduction structure 33 is installed, and defines a plurality of linear grooves 341 that are spaced apart from each other and do not communicate with the open grooves 322 and the narrow grooves 332.

[0028] The plurality of linear grooves 341 correspond to the remaining through holes 314 that are not positioned in the open grooves 322 and the narrow grooves 332 .

[0029] Each linear groove 341 is located outside the two through holes 314 so as to communicate with the two through holes 314, and is formed so as to have a width smaller than that of the open groove 322 and approximately the same as the hole diameter of the through hole 314. In this embodiment, as shown in Figures 4 and 5, each linear groove 341 is located outside the two through holes 314 so as to communicate with the two adjacent through holes 314, and the width of the linear groove 341 is within a range of 1.0 mm to 1.2 mm.

[0030] When the string 4 is actually inserted into the two through holes 314 in the wire groove 341 , the portion of the string 4 positioned outside the outer circumferential surface 313 is accommodated in the wire groove 341 .

[0031] In addition, it is not necessary to install the shielding body 34 according to the actual manufacturing needs. The number and installation positions of the protruding structures 32, the drag reducing structures 33, and the shielding body 34 can be adjusted according to the aerodynamic needs.

[0032] According to the above structure, in the racket frame of the present invention, the strings 4 can be directly inserted into the through holes 314 to be tensioned, eliminating the need for plastic nails, which reduces the number of parts and is environmentally friendly. The part of the string 4 located outside the outer circumferential surface 313 is shielded by the convex portions 321, the side walls 331 or the shields 34. The resistance reducing structure 33 is designed at a specific position according to aerodynamics, and the width of the narrow grooves 332 is smaller than the width of the open grooves 322 and is approximately the same as the diameter of the through holes 314, so that the side walls 331 come into close contact with the part of the string 4 located outside the outer circumferential surface 313, thereby greatly reducing the air resistance and avoiding any impact on the swing of the racket.

[0033] Therefore, the object of the present invention can be achieved reliably.

[0034] While the invention has been described in connection with what are considered to be the exemplary embodiments, it is understood that the invention is not limited to the disclosed embodiments, but is intended to cover various arrangements within its broadest spirit and scope so as to encompass all such modifications and equivalent arrangements.

[0035] The above embodiment is illustrative of the principles and effects of the present invention, and is not intended to limit the present invention. Those skilled in the art may make some changes or modifications to the above embodiment without departing from the spirit and scope of the present invention. Therefore, all changes and modifications made by those skilled in the art without departing from the spirit and scope of the present invention should be considered to be within the scope of protection of the present invention. [Industrial Applicability]

[0036] According to the present invention, it is possible to provide a racket frame that can reduce air resistance. [Explanation of symbols]

[0037] 2 Shaft 3 Head 31 Annular Frame 311 Ball hitting surface space 312 Inner surface 313 Outer surface 314 Through hole 32 Convex structure 321 Convex edge 322 Open Ditch 33 Resistance reduction structure 331 Side wall 332 Narrow groove 34 Shield 341 Line groove 4 String

Claims

1. A shaft and a head connected to the shaft, The head includes an annular frame, a plurality of protruding structures disposed on the annular frame so as to be spaced apart from one another, and a plurality of resistance reducing structures disposed on the annular frame and positioned between two adjacent protruding structures, The annular frame includes an inner peripheral surface that surrounds and defines a ball-striking face space, and an outer peripheral surface that is opposite to the inner peripheral surface and surrounds the inner peripheral surface, the annular frame is formed with a plurality of through holes that are spaced apart from one another, extend from the outer peripheral surface to the inner peripheral surface, and communicate with the ball striking face space; Each of the protruding structures has two protruding edge portions protruding outward from the outer circumferential surface and positioned on both front and rear sides of several of the plurality of through holes, The two protruding portions are spaced apart from each other and define open grooves located outside the corresponding through holes and communicating with the corresponding through holes; Each of the resistance reducing structures has two side walls protruding outward from the outer circumferential surface and positioned on both front and rear sides of several of the plurality of through holes, The two side walls are spaced apart from each other to define a narrowed groove located outside the corresponding through hole and communicating with the corresponding through hole; A racket frame, characterized in that each of the narrow grooves communicates with at least one of the open grooves and has a width smaller than that of the open groove.

2. 2. The racket frame according to claim 1, wherein an end of at least one of the open grooves of the head that is connected to a corresponding narrowed groove is formed so that its width gradually decreases toward the corresponding narrowed groove.

3. The head further includes at least one shield provided on the outer circumferential surface of the annular frame, the at least one shield is provided between two adjacent protruding structures on which the resistance reducing structure is not provided, the at least one shield defines a plurality of linear grooves spaced apart from one another and not in communication with the open grooves and the narrowed grooves; 2. The racket frame according to claim 1, wherein each of the linear grooves is located outside the two through holes so as to communicate with the two through holes, and is formed to have a width smaller than that of the open groove.

4. 4. The racket frame according to claim 1, wherein the through-hole has a diameter within a range of 1.0 mm to 1.2 mm.

5. 5. The racket frame according to claim 4, wherein the width of the narrowed groove is within a range of 1.0 mm to 1.2 mm.

6. 4. The racket frame according to claim 3, wherein the width of the linear groove is within a range of 1.0 mm to 1.2 mm.

7. 2. The racket frame according to claim 1, wherein the shaft and the head are integrally connected and made of carbon fiber material.

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