Recliner mechanism

A recliner mechanism for a vehicle seat includes a support plate (7) mounted on the squab (2) of the seat, and a support plate (11) mounted on the back rest (3) of the seat. There is a pivotal interconnection (10) between the plates to enable the back rest to be reclined. The pivotal interconnection is initially retained by a spring (20), in a retaining part (15) of an elongate slot (14). When the back rest (3) is subjected to a rearward force, such as by a seat occupant in a rear impact situation, the spring is deformed and the pivot shaft moves along the slot (14), enabling the back rest (3) to move rearwardly. An energy absorbing element (17) is provided which deforms, whilst absorbing energy, during this second movement of the back rest.