Twin-axis and head for sports equipment

Abstract

This disclosed subject matter provides twin-axis sports equipment wherein a structure connecting a main shaft and a striking portion comprises two axes. The sports equipment can be a golf club, a hockey stick, an ice hockey stick, a tennis racket, a badminton racket, or the like. The striking portion can be configured as the striking portion of a golf club driver, wood, iron or putter, and can include a golf club driver, wood, iron, or putter having a punched hole or a dimple. A void can be formed in the striking portion, from a toe side and a heel side of the striking portion, which further connects with a main shaft.

Description

[0001]This application claims the priority benefit under 35 U.S.C. §119 of Japanese Patent Application No. 2007-312356, filed on Dec. 3, 2007, which is hereby incorporated in its entirety by reference.BACKGROUND[0002]1. Field[0003]The disclosed subject matter relates to various sports equipment, such as a golf club driver, wood, iron, and putter, hockey and ice hockey sticks, a tennis racket, a badminton racket, and the like, and particularly relates to twin-axis sports equipment and heads for these types of sports equipment.[0004]2. Description of the Related Art[0005]In the past, various types of sports equipment have comprised many aspects that depend on the skill of the user. For example, particularly for a beginner, etc., the swing of a golf club and the transfer of the moment of force are difficult, resulting in the golf ball or the like never being struck with exact directionality and speed.[0006]This is also related to the so-called third law of sports (the law of action-rea...

AI Technical Summary

Benefits of technology

[0015]Based on the above-described points, the disclosed subject matter provides various sports equipment that can be configured to be capable of supporting the face section of a club head, etc., that contacts a ball with two axes. Alternatively, the various sports equipment can include a punched hole or dimple in the club head (in the case of a golf club). The disclosed subject matter can include sports equipment configured to reduce the operating torque, i.e., preventing a reduction in the moment of force, on the shaft of the club, stick, racket, or the like of the various sports equipment, and eliminating the loss of force caused by the rotation of the head of the club, stick, racket, or the like, making it possible for even a beginner to appropriately and accurately transfer force to the ball.

[0027]In this manner, a golf club or the like can be capable of properly and accurately striking a ball, etc., based on a simple configuration.

Problems solved by technology

For example, particularly for a beginner, etc., the swing of a golf club and the transfer of the moment of force are difficult, resulting in the golf ball or the like never being struck with exact directionality and speed.

As described above, with a conventional golf club, it is difficult to control the directionality of the golf ball when striking the ball, and particularly difficult to control a rightward slice, thereby hindering the improvement of the golf play of a beginner, etc.

In various sports, in general, torque—which is the moment of force around a rotation axis—becomes an issue when rotating an object around a fixed rotation axis.

Nevertheless, the disclosure of JP-A 1998-201884 is limited to a golf putter and cannot be used with golf clubs in general or with various sports equipment as is the case with the disclosed subject matter, and its configuration is limited to an even arrangement of the two axes on the upper surface of the putter.

Nevertheless, these descriptions are based on existing golf clubs and are not provided to solve the aforementioned problems or address the same concerns as does the disclosed subject matter.

Conventional sports equipment, such as golf clubs, for example, are provided with a distance (approximately 4 cm in the case of a golf club) between the club head center of gravity that strikes the golf ball and the shaft, resulting in an impact in the range of tons on a section not in line with this axis.

As a result, the club head rotates and, at the moment of impact of the club, stick, or racket on the ball, puck, shuttlecock, or the like, the head unavoidably bends rightward due to the great force, sometimes causing the struck ball, such as the golf ball, to curve, i.e., slice.

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