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Sporting racketRelated Patent Categories: Games Using Tangible Projectile, Player Held And Powered, Nonmechanical Projector, Per Se, For Projecting Aerial Projectile By Striking; Part Thereof Or Accessory Therefor, Racket Or Paddle; Accessory Therefor (e.g., A Tennis Racket, Tennis Racket Press, Etc.)Sporting racket description/claimsThe Patent Description & Claims data below is from USPTO Patent Application 20060166767, Sporting racket. Brief Patent Description - Full Patent Description - Patent Application Claims
FIELD OF THE INVENTION [0001] The present invention relates to a sporting racket using strings in a hitting area in tennis, badminton, etc. More particularly, the present invention relates to a racket that allows the tension of stretched strings to be changed (or adjusted) in an appropriate and easy manner. BACKGROUND ART [0002] Rackets for tennis, badminton, etc do not provide satisfactory tension of the strings stretched therein depending on the rigidity of the frame, the size of the face (size of the hitting area), the repulsive force of the strings, the preference of a player, etc. In such a case, the user must put up with the unsatisfactory tension or must stretch the strings again until a desired tension is obtained. [0003] Current users of such rackets also face a situation in which the strings cannot be always maintained to have a desired tension due to the initial elongation of the string itself and the change by the repeated use. DISCLOSURE OF THE INVENTION [0004] The present invention has been made in view of the above and has an objective of providing a racket capable of easily adjusting the tension of the strings in a simple structure. [0005] According to a first aspect of the present invention, there is provided a racket including a loop-shaped frame body having an inner surrounded region in which strings are stretched in a net shape to provide a hitting area; and a shaft section having a grip section gripped by a player, at a tip end section thereof, the racket comprising: a plurality of string holes provided in the frame body to allow the strings to be folded back therethrough; and a string tension adjustment member provided between the string holes positioned to be adjacent to each other to form a string folding portion and configured to allow the string to be folded in a desired position, wherein the string tension adjustment member includes columnar member having a string-contact face on a peripheral face thereof, and a distance from a rotation center of the string tension adjustment member to the string-contact face is variable. [0006] In accordance with the racket structured as described above, the string tension adjust member can be operated to allow the string to be easily adjusted to have a desired tension. [0007] In the racket, when the string-contact face is provided in a tapered helical manner on a peripheral face of the columnar member, the tension can be continuously changed to become a desired one. In this case, this columnar member may be made of a resin, metals such as aluminum, wood, or ceramics. [0008] When the string-contact face in the racket is formed by a screw groove, a structure which is simple and that has a high reliability is achieved. [0009] According to a second aspect of the present invention, there is provided a sporting racket including a loop-shaped frame body having an inner surrounded region in which strings are stretched in a net shape to provide a hitting area; and a shaft section having a grip section gripped by a player, at a tip end section thereof, the racket comprising: a plurality of string holes provided in the frame body to allow the strings to be folded back therethrough; and a string tension adjustment member provided between the string holes positioned to be adjacent to each other to form a string folding portion and configured to allow the string to be folded at a desired position, wherein the string tension adjustment member has a screw mechanism configured to change a position at which the string is folded. [0010] Thus, according to the racket having the structure as described above, the string tension adjustment member functioning as the screw mechanism can be operated to easily adjust the strings of the racket to have a desired tension. [0011] The racket as described above is superior to the racket according to the first invention in that the wedge action by the screw (force doubling action) can be used to easily change the force of the string. [0012] When any of the rackets has a yoke section and the string tension adjustment member is disposed at the yoke section, a structure preferable from the viewpoint of practicality is obtained. BRIEF DESCRIPTION OF THE DRAWINGS [0013] FIG. 1 is a view showing the entire structure of a tennis racket that is one type of sporting rackets according to an embodiment of the present invention; [0014] FIG. 2 is a partially enlarged perspective view illustrating a yoke section of the racket shown in FIG. 1; [0015] FIGS. 3(a), 3(b), and 3(c) are views showing the structure of a string tension adjustment member provided in the yoke section of FIG. 2, wherein FIG. 3(a) is a side view of the string tension adjustment member, FIG. 3(b) is a view taken in the direction of arrows along line IIIb-IIIb of FIG. 3(a), showing a helical string-contact face of the string tension adjustment member of FIG. 3(a), and FIG. 3(c) is a cross-sectional view taken along line IIIc-IIIc of FIG. 3(a) in which the string tension adjustment member shown in FIG. 3(a) causes the string to be in contact with a string folding position with the minimum tension; [0016] FIGS. 4(a) and 4(b) are partially enlarged perspective views of the string tension adjustment member with the string tension adjustment member shown in FIGS. 3(a), 3(b), and 3(c) provided in the yoke section of the racket, in which FIG. 4(a) illustrates an embodiment in which the string tension adjustment member is attached to a general yoke section and is a cross-sectional view taken in a direction orthogonal to the longitudinal direction of the yoke section, and FIG. 4(b) is a view taken along line IVb-IVb of FIG. 4(a); [0017] FIG. 5 is a partially enlarged perspective view of the yoke section illustrating an embodiment in which the string tension adjustment member as shown in FIGS. 3(a), 3(b), and 3(c) is stored in a storage hole of a member adjacent to the yoke section; [0018] FIGS. 6(a) and 6(b) are views showing a structure of the string tension adjustment member different from that of FIGS. 3(a), 3(b), and 3(c) in which a columnar member is formed by a tapered columnar member, in which FIG. 6(a) is a cross-sectional view taken in a direction orthogonal to the longitudinal direction of the yoke section with the string tension adjustment member and FIG. 6(b) is a cross-sectional view taken along line VIb-VIb of FIG. 6(a); [0019] FIGS. 7(a) and 7(b) are views showing another embodiment illustrating the structure of the string tension adjustment member using a screw mechanism in which the string tension adjustment member is attached to the yoke section, in which FIG. 7(a) is a cross-sectional view taken in a direction orthogonal to the longitudinal direction of the yoke section and FIG. 7(b) is a cross-sectional view taken along line VIIb-VIIb of FIG. 7(a); [0020] FIG. 8 is a cross-sectional view showing another embodiment that is different from the one using the screw mechanism in FIGS. 7(a) and 7(b), which is taken in a direction orthogonal to the longitudinal direction of the yoke section, and illustrating the structure of the string tension adjustment member attached to the yoke section; and Continue reading about Sporting racket... Full patent description for Sporting racket Brief Patent Description - Full Patent Description - Patent Application Claims Click on the above for other options relating to this Sporting racket patent application. ###  How KEYWORD MONITOR works... a FREE service from FreshPatents1. Sign up (takes 30 seconds). 2. Fill in the keywords to be monitored. 3. Each week you receive an email with patent applications related to your keywords. Start now! - Receive info on patent apps like Sporting racket or other areas of interest. ### Previous Patent Application: Putting training device Next Patent Application: Method and apparatus for determining a slippage value that represents a slippage condition between two rotating components Industry Class: Games using tangible projectile ### FreshPatents.com Support Thank you for viewing the Sporting racket patent info. 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