Practice aids to move the body to not move the position of the head

摘要

Practice aids impression is strong [challenge] installation is easy, and not to interfere with the practice of moving the body of the natural swing of the golf club, if there is a change in appearance, practitioners can recognize the movement of my head I provide. Semi-cylindrical lens array 9 are formed side by side a number [SOLUTION] on the surface of the plate-like body of a transparent plate. The back of the plate-like body, so as to correspond to the semi-cylindrical convex lens 7 that constitutes the semi-cylindrical convex lens array 9, is provided a small figure 13. Small figure 13, these have a shape identical or similar. Then, set the reference point 19 of the virtual on the surface of the plate-like body, in the semi-cylindrical convex lens 7 in the reference point 19 is provided beneath the semi-cylindrical convex lens 7 small figure 13 corresponding. Furthermore, in the semi-cylindrical lens 7 away from the reference point 19, is provided at the position shifted to the side of the reference point 19 from beneath the semi-cylindrical convex lens 7 small figure 13 corresponding. As the distance to the semi-cylindrical convex lens 7 from the reference point 19 is large, the offset is the amount of deviation is larger. [Selection Figure Figure 3