| 摘要 |
<p>PROBLEM TO BE SOLVED: To accelerate the progress of putting by disposing a visible ray emission body which emits a rectilinear visible ray toward the front orthogonal with a clubface to the clubface side of a head. SOLUTION: A bulging part 5 is integrally formed in the upward position of a sweet spot disposed in approximately the central part of the clubface 2. The visible ray emission body 4 consisting of a laser beam source is embedded in the bulging part 5 and is so constituted that the visible ray 7 is emitted rectilinearly toward the front orthogonal with the clubface 2 from an opening 6 at the front surface of the bulging part 5. Batteries 11 for a power source of the visible ray emission body 4 are housed in a grip 10. Both are connected by wiring 12 and a switch 13 for on and off is disposed. The putting in and out of the batteries 11 is made possible by a lid 14. The visible ray 7 may be aligned to a hole cup H direction by the constitution, by which the check of a stroke direction is made possible.</p> |
