Patent ID: 7408721
Filing Date: 2008-08-05
Classification: G02B,H04N

Abstract:
1. A zoom lens comprising: a housing having an inside space, an inner top surface, an inner bottom surface, and an axial hole in communication with said inside space; a rotatable adjustment member having a ring body rotatably coupled to the inner bottom surface of said housing in such a manner that said ring body is axially moveable in the inside space of said housing when the ring body is rotated, said ring body having a through hole in alignment with said axial hole of said housing, and a step; a spring member, which is a non-planar ring member having two first opposite end portions stopped at the inner top surface of said housing, and two second opposite end portions stopped at the step of said ring body of the ratable adjustment member; a lens barrel disposed through the axial hole of said housing and connected to said rotatable adjustment member such that said lens barrel is synchronously movable with said rotatable adjustment member; and wherein said housing comprises a bottom cover shell and a top cover shell fastened to said bottom cover shell and defining with said bottom cover shell the inside space, said top cover shell and said bottom cover shell each having a circular hole disposed in communication with said inside space, the circular holes of said top cover shell and said bottom cover shell constituting with said inside space the axial hole of said housing, said top cover shell having a bottom surface that forms the inner top surface of said housing, said bottom cover shell having a top surface that forms the inner bottom surface of said housing.