(57) A lock provided with a gear device for actuating at least one bolt (8) for closing
a door, window and the like, comprising a gear (31) which is operatively associated
with the bolt (8) and a pinion (23) which meshes with the gear (31), the pinion (23)
having a slot which lies radially between two teeth (25) and is formed by two side
walls (27,28) between which the bit (16) of a cylinder (14) is arranged with play,
the cylinder (14) being inserted in the lock through the pinion (23), the bit (16)
forming, together with the side walls (27,28) of the slot, two interspaces which are
arranged upstream and downstream of the bit (16) with respect to the direction of
rotation of the bit (16), the gear (31) having at least one pair of adjacent teeth
(32,33) which form a tooth space (34) which can be engaged by the bit (16) at each
turn of the pinion (23) and are shaped so that the tooth (32) of the pair that engages
the interspace (29) arranged downstream of the bit (16) produces, during the rotation
angle in which the driven tooth (32) remains engaged in the interspace (29), the approach
and abutment of the bit (16) against the side wall (28) arranged downstream of it.
|
|
