Abstract: In an arrangement of an area wire for an unmanned autonomous operating vehicle having an electric motor supplied with power from a battery for operating an operating machine, and magnetic sensors for detecting intensity of a magnetic field of the area wire and controlled to run about in an operating area defined by the area wire to perform an operation using the operating machine and to return to a charging device installed on the area wire so as to charge the battery, there are provided with a charging device detecting area set to be used for detecting a position of the charging device, and a turn-back portion formed by bending the area wire at an appropriate position toward the charging device detecting area and again bending the area wire to return in a same direction with a predetermined space, whereby the operating area is divided into a plurality of zones.

Abstract: A walk-behind lawn mower includes a cutter and a housing covering the cutter for allowing rotation of the cutter to cut grass. The housing includes a front wall portion covering a front part of the cutter and a portion other than the front wall portion. The front wall portion extends laterally of the housing. The front wall portion has a thickness more than twice a thickness of the portion other than the front wall portion. The front wall portion has a downwardly convex bottom surface, and serves as a handle for use in lifting up the lawn mower.

Abstract: A walk-behind lawn mower includes a cutter and a housing covering the cutter for allowing rotation of the cutter to cut grass. The housing includes a front wall portion covering a front part of the cutter and a portion other than the front wall portion. The front wall portion extends laterally of the housing. The front wall portion has a thickness more than twice a thickness of the portion other than the front wall portion. The front wall portion has a downwardly convex bottom surface, and serves as a handle for use in lifting up the lawn mower.