Abstract: A body movement detection sensor includes a sensor section having a piezoelectric film, a right belt member, a left belt member, and an engagement member configured to engage the right and left belt members. In the body movement detection sensor, the piezoelectric film exhibits piezoelectric effect in a length direction, the right belt member and the left belt member have substantially no elasticity, the body movement detection sensor further includes an elastic sheet directly or indirectly connected to the right belt member and the left belt member, the piezoelectric film and the elastic sheet are arranged substantially without irregularities when viewed from a side, and the elastic sheet has a maximum amount of expansion larger than an amount of change of a thorax during breathing and has a length equal to or smaller than one-sixth of a total length of the right belt member and the left belt member.

Abstract: A body movement detection sensor includes a sensor section having a piezoelectric film, a right belt member, a left belt member, and an engagement member configured to engage the right and left belt members. In the body movement detection sensor, the piezoelectric film exhibits piezoelectric effect in a length direction, the right belt member and the left belt member have substantially no elasticity, the body movement detection sensor further includes an elastic sheet directly or indirectly connected to the right belt member and the left belt member, the piezoelectric film and the elastic sheet are arranged substantially without irregularities when viewed from a side, and the elastic sheet has a maximum amount of expansion larger than an amount of change of a thorax during breathing and has a length equal to or smaller than one-sixth of a total length of the right belt member and the left belt member.

Abstract: A solar battery unit is provided that can release the heat of the solar battery module sufficiently and suppress the temperature increase of a solar battery module by inhibiting the presence of an air layer with a low thermal conductivity in a heat transfer passage, whereby the energy conversion efficiency can be improved remarkably. A solar battery unit has: a solar battery module; and a heat dissipating member, provided on a back surface of the solar battery module, for releasing heat from the solar battery module. A heat transfer sheet including expanded graphite is interposed between the solar battery module and the heat dissipating member, and the heat transfer sheet is attached in a compressed state to the solar battery module and the heat dissipating member.

Abstract: A circuit board using a heat radiating member that can cool an electronic component sufficiently without causing a substrate to break, increasing the total weight of the substrate, lowering the productivity, or increasing cost and device size. A circuit board has a substrate main body (4) having a wiring pattern (3) formed on a surface side, and a structure in which an LED module (1) is connected to the wiring pattern (3). The circuit board is characterized in that: a through hole (6) is provided in a portion of the substrate main body (4) so as to penetrate the substrate main body (4) from the surface side to a back side thereof; a heat radiating member (5) is provided on the back side of the substrate main body (4) so as to close one end of the through hole (6); and the LED module (1) is disposed in the through hole (6) so that the heat radiating member (5) and the LED module (1) are directly in contact with each other.