Foldable spectacle frame

Claim 1

A foldable spectacle frame comprising: a pair of lens frames, a pair of temples hingedly connected to the outer portions of the respective lens frames and movable toward the inner faces of the respective lens frames, first and second bridge each projecting from the inner portion of one of the lens frames toward the other lens frame and hingedly connected together at their forward ends inwardly movably, the hinge portion at the forward ends of the bridges having a pivot pin inclined at a small angle with a vertical line, so that when the spectacle frame is folded, the inner faces of the lens frames are opposed to each other with the temples opposed to the outer faces of the lens frames, and one of the bridges is formed in the vicinity of its forward end with a first block projecting inward, the block having first and second projections projecting respectively from the upper and lower portions of the outer end thereof in parallel to each other and inclined at a small angle with a horizontal plane to define a recess between the first and second projections, the first projection having a first hole, the second projection having a bore extending or not extending therethrough, the other bridge being formed in the vicinity of its forward end with a second block projecting inward, the second block having a third projection projecting from the central portion of the outer end thereof at the same angle of inclination as the first and second projections and fitting in the recess, the third projection having a second hole, the pivot pin being inserted in the first and second holes and the bore and fixed in place, as inclined slightly with respect to a vertical line in corresponding relation to the angle of inclination of the first to third projections.