Pressure washer

1. A pressure washer comprising:

a pump mechanism configured to pressurize water supplied through a water inlet and pump out the water through a water outlet;

an electric motor configured to drive the pump mechanism; and

a housing that houses the pump mechanism and the electric motor, wherein the housing includes an exterior facing lower surface and an exterior facing upper surface that faces in an opposite direction from the exterior facing lower surface,

wherein an outer surface of the housing most proximate to the electric motor has a shape that does not allow the pressure washer to stand on its own when the outer surface is rested on a flat surface, wherein the outer surface is an exterior facing side surface of the housing that extends from the exterior facing lower surface to the exterior facing upper surface of the housing, wherein any three points on the outer surface that surround a projection point on which a center of gravity of the pressure washer is projected cannot simultaneously contact the flat surface, and wherein the outer surface of the housing most proximate to the electric motor has a shape that is rounded in two directions orthogonal to each other.

2. The pressure washer according to claim 1 , wherein

the outer surface of the housing most proximate to the electric motor has a shape protruding outward.

3. The pressure washer according to claim 2 , further comprising:

a battery configured to supply power to the electric motor; and

a cover member that covers a space in which the battery is housed and that can be opened and closed,

wherein the cover member is closed when the outer surface is rested on the flat surface.