LAWN MOWER

摘要

A lawn mower includes: a rotation shaft extending vertically in a downwardly-opening housing; and a cutter blade rotatably mounted on the rotation shaft. The cutter blade is an elongated member extending in opposite horizontal directions and having two bent sections formed on respective ones of its longitudinally opposite end portions. The two bent sections are bent in opposite directions as viewed in the axial direction of the rotation shaft. The cutter blade has, on each of the bent sections, a convex cutter blade section formed along a convex edge of the bent section and a concave cutter blade section formed along a concave edge of the bent section. The convex cutter blade section on each of the bent sections has a smaller cutting edge angle than the concave cutter blade section.

主权项

1. A lawn mower comprising:
a rotation shaft accommodated in a downwardly-opening housing and extending vertically in the housing; and a cutter blade accommodated in the housing and rotatably mounted on the rotation shaft, the cutter blade being an elongated member extending in opposite horizontal directions with respect to the rotation shaft and having two bent sections formed on respective ones of longitudinally opposite end portions thereof, the two bent sections being bent in opposite directions as viewed in an axial direction of the rotation shaft, the cutter blade having, on each of the bent sections, a convex cutter blade section formed along a convex edge of the bent section and a concave cutter blade section formed along a concave edge of the bent section, the convex cutter blade section on each of the bent sections having a cutting edge angle smaller than a cutting edge angle of the concave cutter blade section.