| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a simple golf practice club capable of satisfying a long-time desire to recognize where a golf ball hits on the face of the head of the golf club by improving conventional technologies which can not be practically used, improving a method using outside devices such as a high-speed camera and a magnetic device, which is not easy, improving a method of sticking pressure-sensitive discoloring paper, which must be changed each time, and improving a contact type golf practice club continued from the surface to the inside, which has serious defects in weight, rigidity, manufacturability, or the like. <P>SOLUTION: A plurality of pipes having different lengths, thicknesses, or hole shapes, or a plurality of "acoustic projections" such as flat plates of different lengths, widths, and thicknesses, are disposed on the back (inner side) of the face surface in the golf practice club. The hitting position is identified by capturing a difference in vibration of the pipes or the "acoustic projections" when hitting a golf ball, and the result is displayed on a monitor. <P>COPYRIGHT: (C)2010,JPO&INPIT</p> |
