Patent ID: 7171799

Claim:
A lawn mower, comprising: a cutter housing having a scroll part; a motive power source mounted on the cutter housing and having a rotationally driven output shaft; and a cutter blade attached to an end of the output shaft of the motive power source and rotationally driven thereby inside the scroll part of the cutter housing, wherein the cutter housing is made of a synthetic resin and has side guard parts on left and right peripheries of the scroll part, wherein each of the side guard parts is made up of a substantially horizontal guard wall extending outward from a lower end vicinity of a side wall of the scroll part and in the front-rear direction of the lawn mower, a vertical guard wall extending downward from the horizontal guard wall and in the front-rear direction, and a connecting rib connected between the side wall and horizontal guard wall and between the side wall and the vertical guard wall and extending in the front-rear direction along the side wall, and wherein the side wall, the horizontal guard wall, the vertical guard wall and the connecting rib form a hollow reinforcing part at the lower end vicinity of the side wall and extending in the front-rear direction along the side wall.