An amusement device has an elongated track along which one or more amusement device seat assemblies adapted to carry the one or more passengers are moveable. The work sheet conveying and holding system includes a work sheet stocker 4 and a work sheet conveying device 2. The chair pad provides a substantially rigid surface that folds easily for transport and shipping. It is thus possible to improve an operating characteristic of a device by prohibiting concentration of an electric field at the portion. In this electrical switch, the occurrence of vibrations with the introduction onto an opposing contact is prevented.