Improvements in or relating to a vehicle seat

摘要

A vehicle seat (1) comprises a squab (2) and a backrest (3). The headrest (4) is carried by the backrest. The headrest 4 is provided with a mechanism (7) to move the headrest forwardly in the event that an impact should occur. A locking mechanism (9) is provided to lock the headrest to prevent forward movement of the headrest in response to a predetermined signal. The signal may be generated in response to a rear impact in excess of a predetermined severity. The mechanism acts to reduce whiplash injury from a rear impact/ accident. An energy absorbing device may be fitted. A controller (10) receives signals from sensors (11 and 12) to control the locking mechanism (9).