Patent ID: 7658499
Filing Date: 2010-02-09
Classification: G03B

Abstract:
1. A projector, comprising: a case, having an opening provided thereon; a zoom lens passed through a hole of the case and extended toward outside, the zoom lens having a zoom rod extended from one lateral of a column of the zoom lens, and moving the zoom rod being able to regulate a focal length of the zoom lens; a zoom ring disposed within the case and nearby the opening, the zoom ring having an arc surface, an interior of the arc surface female-contacted with the lateral of the column, a groove provided in an interior of the arc surface to cooperate with the zoom rod, the zoom ring moved back and forth along the arc surface to control the zoom rod, a control rod disposed on an exterior of the arc surface, the opening elongated along the arc surface and a rectangular form; and a control plate mounted on the case and laid over the opening movably, a lodging element provided on one side of the control plate, and movably contacted with the control rod, a handle provided on another side of the control plate and extended outside the surface of the projector, wherein the handle accepts the force along the extending direction of the opening of rectangular shape so as to let the control plate move the lodging element along the extending direction of the opening of rectangular shape and further to move the control rod for continuously regulating the focal length of the zoom lens.