This mechanism is intended for being located in the inner escutcheon of the lock and its purpose is to minimize the forces transmitted, thereby preventing premature wear, as well as being able to be adaptable to any lock. Its structure permits to minimize the turning of the
handle or outer operating knob under no load.The outer escutcheon (3) holds the key reader (4) and an outer knob (5) while the inner escutcheon (6) contains the electronic
control circuit (7) powered by batteries (8), the
clutch mechanism (9) and an inner operating knob (10). Exiting from the
clutch mechanism (9) are two concentric shafts (21, 26), one of which acts on the tumbler (2) of the lock and the other (26) which rotates freely in its interior and to which the outer knob (5) is connected.A validated key activates an
electric motor (51) or similar which displaces a collar (28) causing the
clutch element (27) to bring both concentric shafts (21, 26) together temporarily, forming a single unit and permitting the opening of the lock.