Patent ID: 7438486

Claim:
A device with an elastic shifting mechanism, comprising: a body, having a first snap-fit element; a movable element, installed to said body, and having a second snap-fit element; at least one transmission element, installed to said body/said movable element; an elastic element, with one end thereof fixed to said transmission element and the other end fixed to said body/said movable element; and a drive element, installed to said movable element/said body, engaging with said transmission element, wherein when said movable element is being moved to enable said second snap-fit element to snap-fit said first snap-fit element, said drive element drives said transmission element to rotate, and said transmission element winds up said elastic element; when said second snap-fit element is disengaged from said first snap-fit element, said elastic element releases elastic force to drive said transmission element to rotate, and said transmission element further drives said movable element to move.