| 摘要 |
PURPOSE:To reduce an inertial moment extensively by using a foaming polystyrene resin to make a thick disk-form drum main body, and attaching films with displayed designs around the drum main body. CONSTITUTION:The design drum 30 of a pachinko slot game machine (Japanese vertical type pinball and slot game machine) consists of a thick disk-form drum main body 10 and a film 20 attached to the drum main body 10. The drum main body 10 consists of a center core 11, a rim 13, and plural spokes 12, 12... to connect the core 11 and the rim 13. The drum main body 10 is formed integrally of a polystyrene resin, and the whole form is made into a thick disk whose thickness near the circumference is reduced at regular intervals. Since such a design drum 30 uses a foaming polystyrene resin as its material, and the thickness of the circumferential side is reduced sufficiently, its inertial moment can be reduced to about 1/3 to 1/4 of the conventional product, and the influence to the starting and the stopping performances of a pulse motor 31 can be minimized. |
