MOWER WITH A SEALED CASING AND A FUNCTIONAL MODULE FOR MAINTAINING PRESSURE BALANCE OR DETECTING A SEALING STATE OF THE CASING

The present invention is related to a mower which includes: a housing (1); a movable upper cover (2), disposed on the housing (1); and a cutting assembly (3), disposed on the housing (1). The cutting assembly (3) includes a blade carrier assembly, and the blade carrier assembly includes a blade carrier (5) and a blade (6). The blade carrier includes a disc body (219) and a blade receiving groove (220) recessed inwardly from an edge of the disc body along an axial direction of the disc body. The blade is mounted in the blade receiving groove and arranged to be that the blade is not protruded out of the blade receiving groove in the axial direction of the disc body.