Patent ID: 7076976

Claim:
A mechanical device with anti-shock arrangement, comprising a locking member adapted for linear motion from a first to a second position by a control force and allowing to be moved from said first to said second position by a first inertial force created by a shock applied to said device in suitable direction, the anti-shock arrangement comprising a balancing member mounted for linear motion substantially parallel to the locking member motion, and a pivotally supported lever with two ends and a pivoting axis therebetween, one of said ends being linked to said locking member and the other of said ends being linked to said balancing member, said balancing member being able to create upon said shock a second inertial force applied to said locking member via said lever, said second inertial force substantially balancing out said first inertial force, wherein the link between said lever and said locking member, and between said lever and said balancing member is by abutment, said anti-shock arrangement comprising a biasing means urging at least one of said locking member and said balancing member towards said lever so as to maintain said abutment; and wherein said biasing means includes a spring means urging said balancing member towards said lever.