Abstract: A mobile body includes: a main body provided with a moving function; a storage battery that is disposed in the main body and that stores electric power for driving the main body; a supply unit that supplies electric power to the storage battery; a requesting unit that requests an electric power provider who is able to supply electric power to the storage battery by the supply unit for cooperation in electric power supply; and a granting unit that grants an incentive to the electric power provider that has supplied the electric power to the storage battery by the supply unit. Therefore, when the electric power is insufficient during traveling, the electric power can be supplied to the storage battery by requesting cooperation in electric power supply, and the electric power provider can receive an incentive by supplying the electric power.

Abstract: A delivery vehicle is configured to be able to deliver a package in front of a front door of a dwelling unit in a complex housing including a shared door with automatic lock function that is able to be opened as unlock information is input to an unlock input unit of an entrance via wireless communication. When the delivery vehicle arrives at the complex housing including the shared door with automatic lock function, and a delivery instruction for leaving the package in front of the front door is made, an on-board unit of the delivery vehicle inputs the unlock information to the unlock input unit via the wireless communication, and notifies a terminal device of a user of input date and time.

Abstract: A food delivery pallet is provided with a heating chamber, a heat retaining chamber, a heat retaining chamber, a cooling chamber, and an electric bulletin board. Therefore, in the food delivery pallet, when food is heated in the heating chamber, the electric bulletin board displays that the food is being heated in the food delivery pallet. This makes it possible to call attention of people nearby to the food delivery pallet, and to ensure safety of the people nearby.

Abstract: Provided is a mobile body system including a traveling unit having an autonomous traveling function and a trolley unit having a housing portion for loading an object. A detection unit detects an amount of objects placed on the housing portion. A control unit determines an operation of the traveling unit based on the amount of objects detected by the detection unit.

Abstract: A periodontal pocket cleaning device is provided which has a very excellent effect for the prevention of periodontal diseases, which is least liable to cause injury to the periodontal pocket, which can be used at any place without limiting the place of its use, which is able to obtain a stabilized atomized jet without being influenced by the height position of the handy probe, and which is available at a low cost. The periodontal cleaning device includes a handy probe provided with an air-jet ejection mechanism, an air pump for producing compressed air, and an air-feeding tube for feeding the compressed air from the air pump to the handy probe. The handy probe is provided with a liquid storage tank for storing liquid agent such as water or liquid chemicals therein. The jet-out pressure of the compressed air to be ejected from the nozzle of the handy probe is set in a range of from 0.05 to 0.08 kg/cm.sup.2. The jet-out quanity of the compressed air is set in a range of from 2 to 30 l/min.