Spring mechanism for power device

A spring mechanism for attaching to a power device, the device including a drive unit capable of being actuated by a user, the spring mechanism comprising:

• a housing including a sidewall portion, the housing connectable to a portion of the power device;
• a shaft extending through the housing and having a first end and a second end opposite the first end, the second end coupled to a workpiece, the shaft defining a longitudinally extending shaft axis, the sidewall portion of the housing being laterally spaced from the shaft;
• a bottom member including at least one of a ferromagnetic material and a permanent magnet, the bottom member connected to the first end of the shaft and positioned adjacent the drive unit, wherein the bottom member, shaft and workpiece move upon actuation of the drive unit;
• and
• a spring extending laterally between the shaft and the sidewall portion of the housing, the spring having a shaft end adjacent the shaft and a housing end adjacent the housing, the spring defining a spring bend axis between the shaft and the sidewall portion of the housing and offset from and substantially parallel to the shaft axis, the spring affixed to the shaft and the housing, wherein the shaft moves on an arcuate path about the spring bend axis and the spring is caused to bend about the spring bend axis between a deformed position and a return position by the movement of the bottom member.