Patent ID: 8376554

Claim:
A projector comprising: a projection optical device configured to project an image; an exterior housing that includes an image opening section for allowing the image projected from the projection optical device to pass through; a shutter disposed inside the exterior housing, the shutter being configured to close the image opening section; and a support member configured to support the shutter in either a closed position in which the image opening section is closed, or in an open position in which the image opening section is opened, the shutter and support member being provided with an engagement structure allowing the shutter to move along the support member, the engagement structure including: i) an engagement protrusion that: a) protrudes along a vertical axis, and b) is provided on one of the shutter and the support member, and ii) an engagement groove that: a) extends in a direction in which the shutter moves, b) is provided on the other of the shutter and the support member, c) receives the engagement protrusion thereby guiding a movement of the engagement protrusion, and d) is configured in such a way so as to cause the shutter to move both inward and away from the exterior housing, as the shutter moves from a closed position to an open wherein, the engagement groove includes a first groove section and a second groove section configured to communicate with each other, and the second groove section is formed in such a way as to extend from a finish end, at which the engagement protrusion is positioned in the open position, so as to be approximately perpendicular to a projection direction of the projection optical device, the first groove section being formed in such a way as to: i) form an obtuse angle with respect to the second groove section, and ii) extend to the finish end.