Abstract: According to one embodiment, an electronic device includes an elastic insulating base including a plurality of island-shaped portions and a plurality of strip-like portions each connecting respective adjacent pair of the plurality of island-shaped portions, electrical element located on each of the plurality of island-shaped portions and a plurality of wiring lines located in the plurality of strip-like portions respectively and each electrically connected to the electrical element. Each of the plurality of strip-like portions including a curved portion, and a ratio (R/W) of a radius (R) of curvature in the curved portions to the width W in the curved portion is in a range of 10?R/W?20.

Abstract: According to an aspect, a stretchable device includes: a resin base member; and a signal line and a strain gauge stacked on the resin base member. The resin base member includes: a plurality of bodies disposed separately from each other; and a plurality of hinges that couple the bodies while meandering. The hinges each include: a plurality of bends that bend and are disposed between the bodies; and a base that linearly extends to couple one of the bodies to a corresponding one of the bends. The signal line includes: a bend signal line stacked on the bends; and a base signal line stacked on the base. The base signal line has an occupied area per unit length in a length direction of the signal line larger than the bend signal line when viewed in a stacking direction in which the signal line is stacked on the resin base member.

Abstract: A rotor includes a rotor core, permanent magnets, and a tubular non-magnetic cover. The permanent magnets are arranged along an outer surface of the rotor core in the circumferential direction. The permanent magnets each include a curved outer surface as viewed in the axial direction. The tubular non-magnetic cover covers the outer surfaces of the permanent magnets. The rotor core includes at least two stacked cores. Each stacked core includes a stack of core sheets. One of the stacked cores is formed from a material having a lower hardness than the other stacked core.

Abstract: A rotor includes a rotor core, permanent magnets, and a tubular non-magnetic cover. The permanent magnets are arranged along an outer surface of the rotor core in the circumferential direction. The permanent magnets each include a curved outer surface as viewed in the axial direction. The tubular non-magnetic cover covers the outer surfaces of the permanent magnets. The rotor core includes at least two stacked cores. Each stacked core includes a stack of core sheets. One of the stacked cores is formed from a material having a lower hardness than the other stacked core.

Abstract: A rotor includes a rotor core, permanent magnets, and a tubular non-magnetic cover. The permanent magnets are arranged along an outer surface of the rotor core in the circumferential direction. The permanent magnets each include a curved outer surface as viewed in the axial direction. The tubular non-magnetic cover covers the outer surfaces of the permanent magnets. The rotor core includes at least two stacked cores. Each stacked core includes a stack of core sheets. One of the stacked cores is formed from a material having a lower hardness than the other stacked core.

Abstract: A rotor includes a rotor core, permanent magnets, and a tubular non-magnetic cover. The permanent magnets are arranged along an outer surface of the rotor core in the circumferential direction. The permanent magnets each include a curved outer surface as viewed in the axial direction. The tubular non-magnetic cover covers the outer surfaces of the permanent magnets. The rotor core includes at least two stacked cores. Each stacked core includes a stack of core sheets. One of the stacked cores is formed from a material having a lower hardness than the other stacked core.

Abstract: An aluminum flat tube for a heat exchanger is fabricated from an aluminum strip-shaped material which is structured by a core material coated with a sacrificial anode material on the inner face thereof and coated with a brazing filler metal on the outer face thereof by bending in the width direction to form a nearly B-shaped flat cross section. To improve the corrosion resistance of the inner face of the tube, the both edge parts of the strip-shaped material in the width direction thereof are bent inward into the tube so as the front end edge of the edge part to become apart from the flat inner face of the tube.