Tool bit structure for hair clipper and hair clipper

The utility model discloses a cutter head structure for a hair clipper. The cutter head structure comprises a fixed cutter frame, a fixed cutter, a movable cutter frame and a movable cutter, the fixed knife is arranged on the fixed knife rest; the movable knife rest is movably arranged on the fixed knife rest; the movable cutter is arranged on the movable cutter frame and can do horizontal shearing motion relative to the fixed cutter along with the movable cutter frame; the fixed knife rest is provided with an isolation structure used for separating knife teeth of the fixed knife from the skin, the isolation structure is provided with a plurality of gaps or notches allowing hair to penetrate into the fixed knife and the movable knife, and every two adjacent gaps or notches are separated. The cutter teeth of the fixed cutter are separated from the scalp of a person through the isolation structure, the situation that the cutter teeth of the fixed cutter make direct contact with the scalp and scrape the scalp is