Lawn mower having a maintenance tool for maintaining a cutting blade

A lawn mower comprising:

• a rotation shaft coupled to a power source and extending in an approximately vertical direction;
• a blade configured to rotate integrally with the rotation shaft;
• a housing having a downward opening and accommodating the blade during the blades rotation;
• a maintenance tool provided on the housing, the maintenance tool being contactable with the blade from above;
• and
• a cutting portion position changing mechanism configured to change a position of a cutting portion of the blade such that the cutting portion has contact with the maintenance tool,
• wherein the cutting portion of the blade is capable of moving between a maintenance position at which the cutting portion is contactable with the maintenance tool and an operating position at which the cutting portion mows a lawn,
• wherein the cutting portion position changing mechanism includes a conversion mechanism having a pin and a cam portion, and
• wherein the conversion mechanism changes the position of the cutting portion between the maintenance position and the operating position by rotating the cam portion with a sliding movement of the pin.