Fastening device for blocks, in particular for fastening an autonomous emergency-lighting block on a bracket

摘要

Two electrical lighting units (10,11), one fixed and the other movable, are brought together and locked. A locking claw (16) is movable between locking and release positions. The movable unit carries the claw which can rotate and is moved elastically (17) towards its permanently locked rest position. The movable unit has a pocket (20), formed by two parallel walls (15,21), in which the claw is engaged. One of the walls forms a support surface for the elastic device and the other wall forms a stop surface for its rest position.