The contactless power feeding device of the present embodiment includes: a placement portion on which a plurality of carts including a device and a power receiving unit that receives power to be fed to the device is placed in a state of being arranged in o...

An apparatus for preventing congestion comprises a seat body 1, air bags 5g and 5h for energizing muscles of the legs of an occupant seated on the seat body 1, air supply/ exhaust device 6 for expanding and shrinking the air bags 5g and 5h and a control ci...

An electric vacuum cleaner (1) according to the present invention boosts a voltage supplied to a motor-driven blower (6) through the use of a boost converter circuit (19) with a DC power supply (10) as a drive source to thereby increase the output of the m...