Abstract: An information processing apparatus includes a housing in which a distance sensor is placed, fittings attaching the housing to a toilet bowl in a toilet, and a control unit. The sensor measures the distance to an object located in a direction of the inside of a toilet seat installed on the bowl when the seat is placed on the top surface of a rim of the bowl. The control unit detects that a user of the toilet is in a state of sitting on the seat when a first distance being a result of measurement by the sensor is less than a predetermined threshold value. The fittings are components attaching the housing in such a way that the sensor is placed at a position located inside the rim and located under the seat in the vertical direction when the seat is placed on the top surface of the rim.

Abstract: The upper end of a movable plate for guiding paper sheets is fitted to a shaft on which the plate swings, and is suspended in a slit provided in a stacking box. The movable guide plate and a supporting plate are in a positional relationship in which the angle .theta. formed by them is at a certain prescribed degree, and even if relatively heavy sheets are deposited and hit against the movable guide plate, the plate will not be flipped up because it is supported by the supporting plate. When the stack of the sheets sufficiently increases in volume to reach the lower end of the movable guide plate, the upper end of the plate slides along the slit along with the further deposition of sheets, so that the angle .theta. formed by the movable guide plate and the supporting plate increase to deprive the latter from its supporting function, and the supporting plate, together with the movable guide plate, are pressed upward as the stack of sheets further increases in volume.