Electrically-released spring energy store e.g. for automobile seat headrest, has roller element group with electromagnetically-operated release tongue released from retaining slot for releasing stored spring energy

摘要

The spring energy store has a pair of roller elements (21,22) defining a roller nip receiving a release tongue (30), providing a release group which fits into a retaining slot in a bolt (12) cooperating with a compression spring (16). The release tongue is displaced axially via an armature of an electric coil (28), for movement of the release group from the retaining slot, to allow the potential energy of the compression spring to be released.