Abstract: A hygienic cover that covers a contact part with which a human body is in contact, the hygienic cover includes a base cover directly in contact with the contact part; and a plurality of cover sheets stacked on top of one another, wherein the bottom one of the stacked cover sheets is attached onto the base cover, each of the cover sheets including: a hygienic layer, and an adhesive layer fixed to the bottom the hygienic layer, wherein the adhesive layer is detachable from the top of the hygienic layer of another cover sheet, wherein each of the cover sheets includes a non-adhesive portion formed on an edge thereof, wherein each of the cover sheets placed on top is removed from the remaining of the cover sheets by pulling the non-adhesive portion off when the cover sheet become contaminated.

Abstract: A self-generating device equipped in a mechanical system including a power generating part, an operating part, and a main shaft, the self-generating device comprising: the main shaft rotating according to a rotational force powered by the power generating part and transferring the rotational force to the operating part, wherein the operating part performs mechanical motion using the transferred rotational force; a rotor assembly combined with the main shaft and rotating along with the main shaft according to the rotational force, and a stator assembly surrounding the rotor assembly and staying stationary relative to the rotation of the rotor assembly, wherein magnetic field around the rotor assembly and the stator assembly changes according to the rotation of the main shaft, and the self-generating device generates induced electricity.

Abstract: A medium/large electricity generator equipped with automatically winding and un-winding kite cable mechanism for minimum energy loss is provided. The electricity generation system of the current invention comprises of pluralities of medium size electricity generators, multiplying gears, ampere transfers, cable shafts, automatic clutches, automatic breaks, and auto gear transformers mounted on one medium generator supporting frame, which is mounted on one large power generator system that rotates 360 degrees freely in counter clockwise and counter clockwise. The large power generator system is mounted on a round supporting frame firmly installed on a ground. Each kite is connected to two neighboring cable shafts via one kite cable on one cable shaft. The electricity generator uses negligible energy to wind the kite compared to all other prior arts that use kite for power generation.