Accumulated force critical activation mechanism

The invention relates to the field of activation devices, and provides an accumulated force critical activation mechanism which comprises a wrench, a driving shaft, an accumulated force torsion spring and an activator, the wrench circumferentially positions one end of the driving shaft, and the other end of the driving shaft is connected with the activator through the accumulated force torsion spring; the wrench is pulled to enable the driving shaft to rotate, the driving shaft drives the force storage torsion spring to continuously store force, and when the compression amount of the force storage torsion spring reaches a critical value, the activator releases energy through the force storage torsion spring to achieve activation. The wrench is wrenched to drive the armature to rotate, so that magnetic flux passing through the coil is suddenly changed, induced electromotive force is generated, mechanical energy of people is directly converted into electric energy, and activation can be completed without depend