Patent ID: 7965934
Filing Date: 2011-06-21
Classification: G03B,Y10T

Abstract:
1. A switching mechanism for a camera device, comprising: a driving device, having a lead screw; a first screw bar, connecting to the lead screw of the driving device; a second screw bar connecting to the first screw bar; and a lead screw which one end is coupled with the second screw bar; wherein the first screw bar is driven by the driving device via the lead screw, the second screw bar being driven by the first screw bar via a screw thread thereof such that the driven second screw bar then drives the lead screw for rotation, and a screw nut disposed on the lead screw being moved back and forth along the lead screw via the rotation of the lead screw, wherein two stop blocks disposed at two ends of the lead screw are respectively to limit two positions of the moved screw nut while the moved screw nut is moved to be out of a threaded area of the lead screw, so that upon the screw nut being out of the threaded area of the lead screw and moved to any of the two stop blocks, the screw nut and lead screw are slightly engaged with each other and then a screw thread of the screw nut is separated from a screw thread of the lead screw by a small distance.