| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a game board of a Pachinko game machine with excellent durability, which can suppress the fatigue breakdown of spikes. Ž<P>SOLUTION: A guide rail 13 is attached to the front surface of a game plate 12 composed of a synthetic resin, recessed parts 21 composed of a groove in a semi circular arc shape are formed at symmetrical positions around the nail 14 which is easy to cause the fatigue breakdown by a collision with a game ball B among many nails 14 driven in a playfield 11 on the inner side surrounded by the guide rail 13, and a thin column part 22 is formed between the recessed part 21 and the nail 14. The column part 22 is elastically deformed by impact force when the game ball B collides with the nail 14, the impact force is absorbed by the deformation, and the nail 14 is prevented from being broken by fatigue. Ž<P>COPYRIGHT: (C)2010,JPO&INPIT Ž
|
