초록 ▼

A covering member (4), a solar battery (3) and a hand-operating mechanism-containing movement (2) are housed inside a case (1) which has a front side opening (1a), a glass (5) which is provided in the front side opening (1a), in the order of these constituents from the face side of the case (1). The

A covering member (4), a solar battery (3) and a hand-operating mechanism-containing movement (2) are housed inside a case (1) which has a front side opening (1a), a glass (5) which is provided in the front side opening (1a), in the order of these constituents from the face side of the case (1). The solar battery (3) is disposed opposite to the glass (5) at a light receiving surface thereof which is covered with the covering member (4). The covering member (4) can also serve as a dial. If the covering member (4) is molded out of ceramic, it can provide the dial with a white appearance, so that light can sufficiently be transmitted to the receiving surface of the solar battery (3) owing to the light transmittance of the ceramic.

대표청구항 ▼

[ What is claimed is:] [1.] A solar battery powered watch comprising a case having an opening on a front side thereof, and a glass covering the opening, a movement having a hand-driving mechanism and housed in the case, a solar battery having a light receiving surface disposed opposite to the glass

[ What is claimed is:] [1.] A solar battery powered watch comprising a case having an opening on a front side thereof, and a glass covering the opening, a movement having a hand-driving mechanism and housed in the case, a solar battery having a light receiving surface disposed opposite to the glass and installed on a front side of the movement inside the case, and a covering member for covering the light receiving surface of the solar battery,characterized in that the covering member is formed by molding ceramic containing alumina as a main constitute wherein an average diameter of the ceramic grains ranges from 5 .mu.m to 40 .mu.m, and the covering member is molded to a thickness ranging from 0.2 mm to 0.5 mm.