Patent ID: 8516865

Claim:
A clutch mechanism for an electromechanical lock cylinder, comprising: an electromagnetic motor ( 2 ) having an output shaft connected to a threaded spindle ( 3 ); a movable cart ( 4 ) axially displaceable by said spindle ( 3 ), the movable cart ( 4 ) in turn comprising clutch pins ( 12 ); a resilient device disposed in an interior of said movable cart ( 4 ), said resilient device being constituted by two front springs ( 26 ) joined together at one of their ends by a common transverse portion ( 26 ′) engaged in a valley of the spindle ( 3 ) thread, said resilient device being configured to move the movable cart ( 4 ) via said common transverse portion ( 26 ′) between a disengaged position and an engaged position, such that in the disengaged position, the front springs ( 26 ) are compressed and in the engaged position said common transverse portion ( 26 ′) is deformed, such that in both positions said common transverse portion ( 26 ′) carries out a continuous thrust on the spindle ( 3 ); wherein said front springs ( 26 ) are constituted by compressions springs; and wherein said compressions springs ( 26 ) are constituted by coil springs.