| 摘要 |
PROBLEM TO BE SOLVED: To produce a zero-reset device equipped with independent hammers, which is provided with increased operational reliability, high accuracy in terms of the simultaneous actuation of the hammers, and also a well defined force applied to heart-shaped cams.SOLUTION: Bending and release means 6 is capable of bending hammer springs in a first phase of an actuation of first control means 1 and also cooperating with locking means 7 in a second phase of the actuation of the first control means 1 such that the locking means 7 passes from a first, rest position, in which the locking means 7 holds the zero-reset hammers in the rest positions thereof, to a second, release position, in which the locking means releases the zero-reset hammers, which come, in any case under the action of the corresponding hammer spring, into the positions of cooperation with the corresponding zero-reset cam. |
