Optics: eye examining – vision testing and correcting – Spectacles and eyeglasses – With antiglare or shading
Patent
1995-06-19
1997-01-07
Mai, Huy
Optics: eye examining, vision testing and correcting
Spectacles and eyeglasses
With antiglare or shading
351 92, 351105, 351110, G02C 710, G02C 108, G02C 104, G02C 102
Patent
active
055922422
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
The present invention relates to sunglasses being provided with a lens of the single-lens type.
BACKGROUND ART
Recent years have seen, especially on the occasion of the playing sports, the frequent use of sunglasses having: a lens of single-lens type made of a plastic resin such as polycarbonate, frames mounted on both side edges of the lens, and temples attached to the respective frames. With some of these sunglasses, a user can selectively change parts such as lenses or frames in order to coordinate their colors and designs suitably for occasions and purposes.
FIG. 12 shows a typical mounting structure of frames and a lens adopted in such sunglasses. Opposite upper side edges of a lens 2 of sunglasses 1 are provided with their respective mounting elements 3 each having its tip portion 3a formed into a hook. Each of a pair of frames 4 is in the form a U-shaped flume with its opening facing downward. A temple 5 is attached to one end in the longitudinal direction of each of the frames 4 and pivotally supported thereby. At the midpoint of each of the frames 4 is provided an engagement piece 6 so that it is held between the opposed inner walls of the corresponding frame 4. Each of the mounting elements 3 is inserted into the frame 4 from the side of the other end in the longitudinal direction of the frame 4, so that the above tip portion 3a comes to mesh with the engagement piece 6.
In the sunglasses 1 with such a mounting structure, although the frames 4 can easily be mounted on or dismounted from the lens 2 (by so-called one-touch operation), if the tip portion 3a is accidentally disengaged from the engagement piece 6, the mounting element 3 of the lens 2 slips down through the downside opening of the frame 4. In short, the frames 4 easily come off the lens 2 by accident, which presents a problem to be solved.
SUMMARY OF THE INVENTION
An object of the present invention is to provide sunglasses with enhanced usability in which frames can easily be mounted on and dismounted from a lens, while they are less likely to come off the lens by accident.
The present invention includes a lens of the single-lens type made of a plastic resin, a pair of frames mounted on opposite upper side edges of the lens, and a pair of temples pivotally supported by the pair of respective frames. Each of the upper side edges of the above lens is provided with an engagement hole and an engagement long nick substantially horizontally extending and having an open outer end. Each of the above frames is provided with a pair of holding pieces for holding therebetween one of the upper side edges of the lens. An inner face of either one of the holding pieces is provided with a projection to be engaged with the above engagement hole. An elongated protrusion is provided between the holding pieces so as to be engaged with the above engagement long nick.
According to the present invention, in mounting a frame on the lens, one of the upper side edges of the lens is inserted into the space between the holding pieces of the frame, while the elongated protrusion of the frame is engaged with the corresponding engagement long nick of the lens, thereby moving the frame toward the interior of the lens and engaging the projection of the frame in the corresponding engagement hole of the lens. Consequently, the holding pieces of the frame hold therebetween the side edge of the lens, while having the elongated protrusion of the frame engage with the engagement long nick of the lens, and having the projection of the frame engage in the engagement hole of the lens. As a result, the shifting of the frame both toward the interior of the lens and in the vertical direction of the lens is restrained, so that the frame is stably held on the lens.
In dismounting the frame from the lens, on the other hand, the projection is pulled out of the engagement hole by pushing apart the holding pieces and then the elongated protrusion is pulled out of the engagement long nick, while the frame is moved toward the exterior of the lens, thereby dismountin
REFERENCES:
patent: 4563066 (1986-01-01), Bononi
patent: 4666266 (1987-05-01), Morrison
patent: 5387949 (1995-02-01), Tackles
Mai Huy
O.G.K. Hanbai Co., Ltd.
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