Mower

A mower, having a lawn mulching mode and a lawn collection mode, comprising:

• a casing provided with a cutting cavity and a connecting port;
• a door assembly pivotally connected with the casing, when the door assembly being in an open position, the cutting cavity connected with the connecting port, the mower being in the lawn collection mode, and when the door assembly being in a closed position, the connecting port being closed, and the mower being in the lawn mulching mode;
• and
• a knob assembly connected with the door assembly and capable of driving the door assembly to move;
• wherein, the knob assembly further comprises a locking component with a locked state and an activated state,
• when the locking component is in the locked state, the knob assembly is non-rotatable,
• when the locking component is in the activated state, the knob assembly is rotatable, and
• a rotating axis of the locking component is substantially perpendicular to a rotating axis of the knob assembly.