Trimmer head and trimmer

A trimmer head (1) is disclosed arranged to be driven around a rotational axis (ax), via an interface (2), to rotate a trimmer line (3). The trimmer head (1) comprises a housing (1a, 1b), the interface (2), a trimmer line spool (5, 5′), and an automatic feed mechanism (7). The automatic feed mechanism (7) is configured to release a trimmer line (3) spooled around the trimmer line spool (5, 5′) when the trimmer head (1) is subjected to a change in rotational speed, via the interface (2), at a higher rate than a threshold rate of change in rotational speed. The trimmer head (1) further comprises an actuator (9, 9′) connected to the automatic feed mechanism (7) such that a manual actuation of the actuator (9, 9′) releases the trimmer line (3) spooled around the trimmer line spool (5, 5′). The present disclosure further relates to a trimmer (13) comprising a trimmer head (1).