Patent ID: 7658500
Filing Date: 2010-02-09
Classification: G03B

Abstract:
1. A projection lens shutter opening and closing apparatus for a beam projector which comprises: an exterior case provided with an opening for accommodating a projection lens for generating image information and projecting the information onto a screen in a large scale; a shutter member operatively associated with the exterior case for opening and closing the opening; and a driving unit operatively connected to the shutter member and disposed in a separately divided region of the exterior case for effecting the opening and closing of the shutter member, wherein the exterior case is further provided with guide means for guiding the opening and closing movement of the shutter member, said guide means comprising a first slit type guide rail formed at one lateral side of the shutter member in the moving direction; a guide shaft supported to the exterior case to be inserted into the first slit type guide rail; and guide sashes having a second slit type guide rail in which the other side of the shutter member is coupled in movable state and disposed at the exterior case.