Clamping mechanism of spectacle lens

Optics: eye examining – vision testing and correcting – Spectacles and eyeglasses – Brace arm or semi-rimless mounting

Reexamination Certificate

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C351S108000, C351S109000

Reexamination Certificate

active

06644805

ABSTRACT:

RELATED APPLICATION
This application claims the priority of Japanese Patent Application No.2001-183785 filed on Jun. 18, 2001 and that of Japanese Patent Application No.2002-138251 filed on May 14, 2002, which applications are incorporated herein by reference.
BACKGROUND OF THE INVENTION
1. Technical Field
The present invention relates to an improvement of the spectacles, in more details, pertaining to a clamping mechanism of the spectacle lens, which lens can be readily clamped with an extremely streamlined structure so as to render the spectacles shapely in design.
2. Prior Art
Conventionally, the clamping of the spectacle lens is carried out by supporting the same lens with a rimmed or semi-rimmed frame or without such frame at all.
In the case of the rimmed frame, it is often that the lenses are locked to the rims with small screws, which screws shall be turned for both the attachment and detachment of the lenses so as to require skill and labor on the part of the assemblers.
In the case of the semi-rimmed frame, in order to clamp the lenses to the frame, the lower half rim portion of the respective lenses shall be hung to a band, which requires a lot of labor on the part of the assemblers and causes an inconvenience where the lenses can not be held in place once the band is cut off in use.
Further, in the case of the frame having no rims to surround the lenses, the spectacles having such frame comprises a bridge to interpose between the right-and-left lenses and the respective temples hinged through an end member to the respective sides of a front consisting of a pair of lenses that are held in juxtaposition by the bridge wherein the engagement between the lenses and the bridge as well as the end members is achieved by boring the clamping holes in the lenses, through which holes the lenses and the bridge as well as the end members are connected with bolts and nuts, which complicates the frame structure. Thus, it often occurs that the lens edge portions break owing to the external force as applied to the temples, for example.
DISCLOSURE OF THE INVENTION
In view of the above inconvenience encountered with the conventional spectacles, the present invention is to provide a clamping mechanism of spectacle lens that allows the respective lenses to be clamped with an extremely streamlined and shapely structure.
To begin with, in order to solve the above issue, the present invention as characterized in that a spectacle front F comprises a pair of lenses
1
and
1
and a transversely extending front bar
2
to support the respective lenses
1
and
1
in front of the respective eyes wherein clamping holes
11
and
11
are bored through the respective lenses
1
and
1
at an upper rim portion thereof and projections
21
and
21
are provided on the front bar
2
to support the respective lenses
1
and
1
in front of the respective eyes so as to poke the projections
21
and
21
through the clamping holes
11
and
11
of the respective lenses
1
and
1
.
Secondly, the present invention is characterized in that a spectacle front F comprises a transverse lens
1
a
wide enough to cover the respective eyes and a rim frame
2
a
to support a roar side of the lens
1
a
wherein clamping holes
11
a
and
11
a
are bored through the lens
1
a
in the vicinity of its respective sides while projections
21
a
and
21
a
are provided on the rim frame
2
a
, which projections
21
a
and
21
a
correspond to the clamping holes
11
a
and
11
a
so as to poke the projections
21
a
and
21
a
through the clamping holes
11
a
and
11
a.
In addition to the above means, the provision of the relative difference in curvature between the lens
1
and the front bar
2
is effective for elastically clamping the upper rim of the lens to the front bar in accordance with the curvature thereof. In addition to the above means, it is also effective that attachment holes
22
are bored through the front bar
2
, into which holes fixing elements
23
are fitted so as to form the projections
21
. Further, in addition to the above means, it is also effective that the head portion of the projection
21
is covered with a synthetic resin coat
21
a
and that the head portion thereof is provided with a stopper
21
b.


REFERENCES:
patent: 5379464 (1995-01-01), Schleger et al.
patent: 5796460 (1998-08-01), Maturaporn
patent: 6193367 (2001-02-01), Lee
patent: 6345892 (2002-02-01), Nakamura

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