| 摘要 |
PROBLEM TO BE SOLVED: To prevent damage to a floor, to reduce injury to the human body and to improve manufacturing efficiency. SOLUTION: An indian club has a neck part 2, a body part 1 and a head part 3. The neck part 2 is formed of a thermoplastic resin (a first material). The body part 1 is formed of a thermoplastic elastomer (a second material) so as to be integral with one end 2b of the neck part 2 by injection molding. The thermoplastic elastomer has a rubber elasticity at normal temperature and is melted by heating for allowing the injection molding. The head part 3 has a head base part 31 which is positioned on the side of the neck part 2 without contacting a virtual plane A that simultaneously circumscribes both the head part 3 and the body part 1, and a head tip part 32 which includes a point of contact 3b with the virtual plane A and which is positioned opposite to the neck part 2. The head tip part 32 is formed integrally with the head base part 31 by injection molding using the thermoplastic elastomer. COPYRIGHT: (C)2009,JPO&INPIT |
