Anti-tangle roller brush, roller brush mechanism and sweeping robot

An anti-tangle roller brush, comprising:

• a roller brush housing provided with a cavity and a through slot communicating with the cavity, wherein one end of the roller brush housing is a driving end, the driving end is connected to a driver, another end of the roller brush housing is movably connected to a fixed portion, and the fixed portion is provided with a fixed shaft extending towards the cavity;
• and
• a cutting assembly comprising a connector and a blade provided in the cavity,
• wherein the blade is provided in the through slot and is movably connected to the roller brush housing, and the connector is movably connected to the fixed shaft and is connected to the blade, and
• the driving end is configured to drive the roller brush housing to rotate to drive the blade and the connector to rotate, so that the connector moves along the fixed shaft to drive the blade to move along an axial direction of the fixed shaft relative to the roller brush housing, so as to cut hair entangled in the roller brush housing;
• wherein a fixed rod is provided in the roller brush housing, an arc-shaped slot is provided at the blade, and the fixed rod passes through and is provided in the arc-shaped slot.