Abstract: The lid opening and closing mechanism in the present disclosure has an operating member which is displaceable relative to a housing body, and a drive mechanism. When the operating member is in a first position relative to the housing body, the drive mechanism locks the lid so that the lid does not move in a predetermined direction, and when the operating member is moved to a second position relative to the housing body, the drive mechanism releases the lock on the lid, moves the lid in the predetermined direction by at least a predetermined distance, and separates the lid from a predetermined face in a direction perpendicular to the predetermined face.

Abstract: This waterproof microphone device includes a plurality of microphones, a housing, and a plurality of air-impermeable cover members. The plurality of microphones pick up sound wave and output an audio signal. The housing individually houses the plurality of microphones. The housing includes a plurality of holes. The hole guides sound wave to the microphone. The plurality of air-impermeable cover members are mounted on the housing. The air-impermeable cover member seals off the hole.

Abstract: A hydrogen generation apparatus includes: a reformer configured to generate a hydrogen-containing gas by using a raw material; a hydrodesulfurizer configured to remove a sulfur compound from the raw material; a recycle passage through which the hydrogen-containing gas is supplied to the hydrodesulfurizer; a condenser provided on the recycle passage or on a gas passage upstream from the recycle passage; a drain passage through which water condensed in the condenser is drained; a heating medium passage through which a heating medium that recovers heat from the condenser flows; a delivery device configured to cause the heating medium to flow through the heating medium passage; and a controller configured to cause the delivery device to operate when the hydrogen-containing gas is not flowing through the recycle passage at at least one of start-up and stopping of the hydrogen generation apparatus.