| 摘要 |
PROBLEM TO BE SOLVED: To provide a ball tray capable of controlling the repulsion of game balls colliding with the upper surface of the ball tray, receiving game balls, being easily manufactured without requiring special cost for the structure, and preventing the ball tray from permanently setting and from making it hard for game balls to smoothly roll. SOLUTION: The ball tray is composed of a frame-shaped peripheral side face member 12, and a bottom member 13 disposed on the bottom of the peripheral side face member. The bottom member is disposed to freely oscillate in a minute space by attaching the bottom member to the peripheral side face member via a slackly attaching means. In addition, a plurality of rib-shaped impact diffusing pieces 24 are attached to the lower surface of the bottom member to make the intrinsic vibration frequency unspecific. COPYRIGHT: (C)2008,JPO&INPIT
|
