Miniature mechanical trigger ideas needed?

Guest
I am looking for a miniature trigger to release a small compression or
torsional spring that as about 1 lbf of force at full compression. The
trigger should fit in a space about 3X3X3mm or less. I have briefly
looked into nitinol wire, voice coils, watch mechanisms, and solenoids,
but haven't found anything small enough.

I am interested in any information that may direct me toward existing
products or classes of actuators/triggers that may be relevant.
Thank you,

Kurt Sutherland
 

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