Optics: eye examining – vision testing and correcting – Spectacles and eyeglasses – Connectors
Reexamination Certificate
2000-12-26
2001-11-13
Mai, Huy (Department: 2873)
Optics: eye examining, vision testing and correcting
Spectacles and eyeglasses
Connectors
C351S110000, C351S146000
Reexamination Certificate
active
06315409
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to fixtures and a fitting structure for an eyeglass lens, and in particular relates to fixtures and a fitting structure for an eyeglass lens suitable for fitting the eyeglass lens between a bridge and an end piece of a two-point type eyeglass frame.
2. Description of the Related Art
There are various kinds of the two-point type eyeglass frames; for example, the generally known is that comprises an I-shaped bridge, a nose pad to be attached to the bridge, an L-shaped end piece, and a temple swingablly attached to the end piece via a hinge, etc.
In order to attach an eyeglass lens between the bridge and the end piece of an eyeglass frame of such a structure: first, through-holes are formed at the inside and outside rims of the eyeglass lens by using a tool such as a drill; two of the eyeglass lenses are prepared and arranged to have a predetermined spacing therebetween; the bridge is arranged between the both eyeglass lenses; fitting portions at both ends of the bridge are located over top faces of the eyeglass lenses; a hole in each of the fitting portions is aligned with the through-hole of the inside rim of the eyeglass lens; a setscrew is inserted through both the holes via a washer from the top side of the eyeglass lens; a nut is screwed to a portion of the setscrew protruded from the back side of the eyeglass lens via a washer so as to be tightened at a predetermined torque; a locking cap nut is screwed to the end portion of the setscrew so as to be tightened at a predetermined torque.
Then, the end piece is located at the outside rim of each eyeglass lens; a fitting portion at one end of the end piece is located over the top face of the eyeglass lens; a hole in the fitting portion is aligned with the through-hole in the outside rim of the eyeglass lens; a setscrew is inserted through both the holes via a washer from the top side of the eyeglass lens; a nut is screwed to a portion of the setscrew protruded from the backside of the eyeglass lens via a washer so as to be tightened at a predetermined torque; a locking cap nut is screwed to the end portion of the setscrew so as to be tightened at a predetermined torque.
In such a manner, the two eyeglass lenses are respectively attached between the bridge and the end piece of the two-point type eyeglass frame.
However, when the nut is screwed and tightened to the setscrew, the eyeglass lens may be occasionally cracked from the hole portion due to an excessive stress in the thickness direction of the eyeglass lens, so that special attention is required for the assembling and a skilled technique is also demanded in the assembling.
Moreover, since th e setscrews, the washers, the nuts, and the cap screws are used, the costs of parts and assembling rise due to a large number of parts.
Further, when the nut is screwed and tightened to the setscrew, since a special tool is required, inexperienced workers may occasionally damage the eyeglass lens.
Also, on the backside of the eyeglass lens located are the nut and the cap screw, which obstruct the visibility and wiping of the eyeglass lens.
SUMMARY OF THE INVENTION
The present invention has been made to solve the above-mentioned problems of the conventional structure, and it is an object of the present invention to provide fixtures and a fitting structure for an eyeglass lens, wherein when attaching the eyeglass lens between a bridge and an end piece of an eyeglass frame, the eyeglass lens cannot be cracked from a hole portion due to an excessive stress; the number of parts can be kept small, resulting in suppressing the costs of parts and assembling; the eyeglass lens can be easily assembled without a special tool and cannot be damaged even by an inexperienced worker; and further the visibility and wiping of the eyeglass lens are not obstructed.
In order to solve the above-mentioned problems, in accordance with one aspect of the present invention, fixtures for fitting an eyeglass lens between a bridge and an end piece of an eyeglass frame, the fixtures comprise: a pipe screw inserted into a tapped hole formed in at least one of locations of the inside and outside rims of the eyeglass lens and having a thread at least on the internal peripheral face of internal and external faces thereof; and a setscrew for expanding the diameter of the pipe screw by inserting the setscrew into a hole of each of fitting portions of the bridge and the end piece and by screwing and tightening the setscrew into the internal peripheral side of each pipe screw in an aligned state of at least one of combinations of the pipe screw in the inside rim with the hole in the fitting portion of the bridge and the pipe screw in the outside rim with the hole in the fitting portion of the end piece.
Preferably, the pipe screw comprises a flange formed at one end of the pipe screw, so that the flange is abutted on the surface of the eyeglass lens when the pipe screw is screwed into the tapped hole of the eyeglass lens.
At least one slit may be formed at the other end of the pipe screw, the slit penetrating between the external and internal peripheral faces of the pipe screw so as to expand the pipe screw so that the diameter of the pipe screw is increased due to the slit when the setscrew is screwed into the internal peripheral side of the pipe screw.
In accordance with another aspect of the present invention, there is provided a structure for fitting an eyeglass lens between a bridge and an end piece of an eyeglass frame prepared by a process comprising the steps of: forming a tapped hole in at least one of locations of the inside and outside rims of the eyeglass lens; inserting a pipe screw into the tapped hole, the pipe screw having a thread on at least the internal peripheral face of internal and external faces thereof; aligning at least one of combinations of the pipe screw in the inside rim with a hole in a fitting portion of the bridge, and the pipe screw in the outside rim with a hole in a fitting portion of the end piece; inserting a setscrew into the hole of each fitting portion; and screwing and tightening each setscrew into the internal peripheral side of each pipe screw so as to expand each pipe screw so that the diameter of the pipe screw is increased.
Preferably, the process further comprises the steps of: forming a flange at one end of the pipe screw; abutting the flange on the surface of the eyeglass lens when the pipe screw is screwed into the tapped hole of the eyeglass lens; and further forming at least one slit at the other end of the pipe screw, the slit penetrating between the external and internal peripheral faces of the pipe screw so as to expand the pipe screw so that the diameter of the pipe screw is increased due to the slit when the setscrew is screwed into the internal peripheral side of the pipe screw.
According to the present invention wherein the above-described fixtures and the structure are employed, pipe screws are respectively screwed into tapped holes formed at the respective locations in the inside and outside rims of the eyeglass lens; the pipe screw at the inside rim is aligned with the hole in the fitting portion of the bridge; the pipe screw at the outside rim is aligned with the hole in the fitting portion of the end piece; setscrews are respectively inserted into the hole of each fitting portion so as to be screwed and tightened with the pipe screws; the pipe screw is thereby expanded so as to increase tile diameter thereof, so that the external peripheral surface of the pipe screw is tightly pressed onto the internal surface of the tapped hole in the eyeglass lens.
According to the fixtures and the structure of the present invention formed as above, the eyeglass lens is attached between the bridge and the end piece by combined functions of the pipe screw with the setscrew. Therefore, the number of parts can be kept small, resulting in suppressing the costs of parts and assembling. When the setscrew is screwed and tightened to the pipe screw, the pipe screw is outwardly expanded so as to inc
Bacon & Thomas PLLC
Fur Seal Company Limited
Mai Huy
LandOfFree
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