A light detection sensor includes a light source that irradiates a detection target with light, a rod lens that collects emitted light from the detection target, a first light receiving element that detects the emitted light that has passed through the rod lens, and a second light receiving element that detects the emitted light that has passed through the rod lens, at a position different from a position at which the first light receiving element detects the light.

A sheet collection device includes a discrimination portion that discriminates the type of sheet, a plurality of containers that store sheets, a transport portion that transports the sheets to any one container from among the plurality of containers based on the discrimination result by the discrimination portion, an accumulation portion that accumulates progress information of a storage amount of sheets in the container, and a notification portion that predicts a time at which the storage amount of the sheets that are stored in the containers based on the progress information reaches a first predetermined amount and notifies the predicted time to a terminal device.

A sheet collection device includes a discrimination portion that discriminates the type of sheet, a plurality of containers that store sheets, a transport portion that transports the sheets to any one container from among the plurality of containers based on the discrimination result by the discrimination portion, an accumulation portion that accumulates progress information of a storage amount of sheets in the container, and a notification portion that predicts a time at which the storage amount of the sheets that are stored in the containers based on the progress information reaches a first predetermined amount and notifies the predicted time to a terminal device.

A sheet type determining device including a guide that guides a sheet along a sheet conveyance path to a destination. The sheet conveyance path is between a first guide surface and a second guide surface facing each other across an interval. The sheet type determining device further includes a determiner that determines a sheet type when the sheet is in the sheet conveyance path, without having contact with the sheet in conveyance, and one or more regulators that regulate a displacement range of the sheet at a determining position, the displacement range being in a direction of the interval of the first and the second guide surfaces. Each of the regulators is a member that protrudes in an arc shape from the first or the second guide surface toward the guide surface opposite, and is spaced from the guide surface or another one of the regulators opposite.

A sheet type determining device including a guide that guides a sheet along a sheet conveyance path to a destination. The sheet conveyance path is between a first guide surface and a second guide surface facing each other across an interval. The sheet type determining device further includes a determiner that determines a sheet type when the sheet is in the sheet conveyance path, without having contact with the sheet in conveyance, and one or more regulators that regulate a displacement range of the sheet at a determining position, the displacement range being in a direction of the interval of the first and the second guide surfaces. Each of the regulators is a member that protrudes in an arc shape from the first or the second guide surface toward the guide surface opposite, and is spaced from the guide surface or another one of the regulators opposite.

A flavor dispenser device and a head mounting device including the flavor dispenser to enhance the user experience of a motion picture is provided. The flavor dispenser device includes a tape cartridge and a drive mechanism. The tape cartridge includes one or more flavor strips. The drive mechanism advances the tape cartridge inside a first housing, and the one or more flavor strip is dispensed from the first housing in case the drive mechanism is in operation.

A flavor dispenser device and a head mounting device including the flavor dispenser to enhance the user experience of a motion picture is provided. The flavor dispenser device includes a tape cartridge and a drive mechanism. The tape cartridge includes one or more flavor strips. The drive mechanism advances the tape cartridge inside a first housing, and the one or more flavor strip is dispensed from the first housing in case the drive mechanism is in operation.

A printing apparatus includes a casing, an optical sensor, a second light receiving portion and an adjustment part. The optical sensor includes a light emitting portion and a first light receiving portion. The optical sensor is provided at a position in the vicinity of the outlet and located within a conveying region. The conveying region is an area through which the print medium passes. The second light receiving portion is provided in the vicinity of the optical sensor and positioned outside the conveying region where external light is perceivable. The adjustment part is configured to adjust a sensitivity in the detection of the presence of the print medium by the first light receiving portion. Adjustment of the sensitivity of the first light receiving portion is performed based on an intensity of the external light received at the second light receiving portion.

A printing apparatus includes a casing, an optical sensor, a second light receiving portion and an adjustment part. The optical sensor includes a light emitting portion and a first light receiving portion. The optical sensor is provided at a position in the vicinity of the outlet and located within a conveying region. The conveying region is an area through which the print medium passes. The second light receiving portion is provided in the vicinity of the optical sensor and positioned outside the conveying region where external light is perceivable. The adjustment part is configured to adjust a sensitivity in the detection of the presence of the print medium by the first light receiving portion. Adjustment of the sensitivity of the first light receiving portion is performed based on an intensity of the external light received at the second light receiving portion.

A sheet stacking device includes a housing, a discharge tray, a lifting mechanism, a first upper surface detection part, a second upper surface detection part and a control part. The housing has a discharge port. On the discharge tray, the sheet discharged from the discharge port in a predetermined discharge direction is stacked. The lifting mechanism supports the discharge tray. The first upper surface detection part detects a first detected surface of the sheet on the discharge tray. The second upper surface detection part detects a second detected surface of the sheet on the discharge tray on a downstream side of the first detected surface in the sheet discharge direction. The control part controls the lifting mechanism based on a detection result of the first upper surface detection part and a detection result of the second upper surface detection part, and adjusts the discharge tray at a predetermined height.