| 摘要 |
<p>An eyeglass frame (12) includes a pair of rims (14) in which a corresponding pair of bifocal lenses (20) are mounted, and a pair of temples (18) connected to the respective rims (14). Each of the temples (18) includes a joint (26) secured to a corresponding one of the rims (14), a leg (30) having one end connected to the joint (26) and the other end resting behind a wearer's ear, and a mechanism for enabling pivotal movement between the joint (26) and the leg (30) in a vertical plane so as to permit movement of the bifocal lenses (20) between a normal position and an elevated or reading position. The mechanism is so constructed as to decrease the distance between a first point at which the joint (26) is connected to the rim (14) and a second point at which the joint (26) is connected to the leg (30) when the lenses (20) are moved from their normal to elevated position. <IMAGE> <IMAGE> <IMAGE></p> |
