Spectacle lens holding structure
AssigneeHoya Corporation
InventorYukihiro Izumitami
Life of this patent
Estimating the term…
Abstract
A frame for rimless spectacles is provided which has no protuberances projecting from both surfaces of lenses, provides an improved effective field of view, and can be fabricated with ease. Blind holes are formed in nose- and temple-side edge surface portions of each spectacle lens, respectively. A pin-like projection is formed on each of nose-side and temple-side contact plates, and is inserted and fixed in the corresponding blind hole by using an adhesive.
Claims28
A spectacle lens holding structure for use in rimless spectacles, comprising:
- a lens holding member for holding a spectacle lens, said lens holding member having a surface which is disposed in contact with the spectacle lens and on which a projection is formed, the projection being inserted and fixed in a blind hold formed in an edge surface of the spectacle lens.
Rimless spectacles comprising:
- a lens holding member for holding a spectacle lens, said lens holding member having a surface which is disposed in contact with the spectacle lens and on which a projection is formed, the projection being inserted and fixed in a blind hole formed in an edge surface of the spectacle lens.
A spectacle lens holding method of rimless spectacles comprising the steps of:
- filling a blind hole formed in an edge surface of a spectacle lens with adhesive;
- and
- inserting and fixing a projection in the blind hole filled with adhesive, the projection being formed on a surface of a lens holding member and the surface being in contact with the spectacle lens.
A method for forming blind holes in an edge surface of a spectacle lens comprising:
- providing a hole-cutting guide containing at least one guide-hole,
- temporarily affixing said hole-cutting guide to a predetermined position on the edge surface of the spectacle lens where said blind holes are to be formed,
- inserting a drill to form a blind hole at a predetermined position on the edge surface of the spectacle lens.
A hole-cutting guide for a drill that drills blind holes in an edge surface of a spectacle lens comprising:
- a guide body with at least one guide hole extending in a first direction through said guide body,
- said guide body having a surface extending in a second direction substantially perpendicular to said first surface, said surface having a shape corresponding to the curved shape of the portion of the edge surface of a spectacle lens in which a blind hole is to be formed.
A method for forming blind holes in an edge surface of a spectacle lens comprising:
- providing a hole-cutting guide containing two guide holes spaced apart by a preselected distance corresponding to the desired distance between two blind holes to be formed in an edge surface of a spectacle lens;
- affixing said hole-cutting guide to a predetermined position on said edge surface of a spectacle lens such that the guide holes are positioned over the locations on said edge surface where blind holes are to be formed;
- inserting a step-type drill in one of said guide holes;
- and operating said drill to form a blind hole.
Rimless spectacles manufactured according to the method comprising:
- providing a hole-cutting guide containing at least one guide-hole,
- temporarily affixing said hole-cutting guide to a predetermined position on the edge surface of the spectacle lens where said blind holes are to be formed,
- inserting a drill to form a blind hole at a predetermined position on the edge surface of the spectacle lens.
Dependencies are inferred from the claim text.