Projector

Abstract

A projector includes a lamp unit. This lamp unit includes a lamp which emits light, a shield member in which an opening portion is formed which allows light emitted by the lamp to radiate to the exterior, a cover glass fitted to the opening portion, and a retention member which retains the cover glass by squeezing it against the shield member. The retention member is provided with projecting flange portions which press against the four edges of the cover glass.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a perspective view showing the general structure of a projector according to an embodiment of the present invention;

FIG. 2A and FIG. 2B are details drawing showing a shield member of this embodiment; and

FIG. 3A and FIG. 3B are details drawing showing a retention member which, in this embodiment, is attached to a lamp cover, and a Figure showing this retention member in the state in which it is installed to the lamp cover.

Claims

1. A projector which projects a picture upon a screen using light emitted from a lamp unit, wherein said lamp unit comprises: a lamp which constitutes a light source;a shield member in which an opening portion is formed which allows light emitted by said lamp to be radiated to the exterior;a cover glass which is fitted to said opening portion of said shield member; anda retention member which retains said cover glass by squeezing it against said shield member,wherein said retention member comprises a plurality of projecting flange portions, each of which is provided so as to confront one of a plurality of edges of said cover glass.

2. A projector as described in claim 1, wherein said shield member comprises projecting portions which surround each of two corners of said cover glass which are not mutually adjacent.

3. A projector as described in claim 2, wherein said projecting portions are formed so that the region surrounded by said projecting portions is larger than the region surrounded by said projecting flange portions.

4. A projector as described in claim 1, wherein said retention member is formed by bending a single plate.