Optics: eye examining – vision testing and correcting – Spectacles and eyeglasses – Connectors
Reexamination Certificate
2001-02-20
2001-10-16
Dang, Hung Xuan (Department: 2873)
Optics: eye examining, vision testing and correcting
Spectacles and eyeglasses
Connectors
C351S116000, C016S228000
Reexamination Certificate
active
06302539
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to an eyeglass frame, more particularly to an eyeglass frame which includes bows that can be easily assembled to a lens frame without the use of fasteners.
2. Description of the Related Art
A conventional eyeglass frame is typically composed of a lens frame and a pair of elongated bows which are hinged to opposite endpieces provided on the lens frame by means of fasteners, such as a pair of threaded pins. In assembly, the threaded pins are operated with the use of a tool, such as a screw driver. Since the threaded pins are relatively small in size, operation thereof is a labor-consuming task. Moreover, since the bows are frequently folded toward the lens frame and unfolded from the lens frame during use of the eyeglass, the threaded pins are susceptible to loosening from the endpieces to result in malfunctioning of the eyeglass.
SUMMARY OF THE INVENTION
Therefore, the main object of the present invention is to provide an eyeglass frame which includes bows that can be easily assembled to a lens frame without the use of fasteners.
Accordingly, the eyeglass frame of the present invention includes a lens frame and a pair of elongated bows. The lens frame has two opposite end portions, each of which is formed with horizontal top and bottom walls that are spaced-apart from each other so as to define an insert slot therebetween. One of the top and bottom walls is formed with a bow retaining hole communicated with the insert slot. The other one of the top and bottom walls is formed with a bow mounting hole communicated with the insert slot. The bow mounting hole includes a first hole portion aligned with the bow retaining hole along a vertical axis, a second hole portion offset from the bow retaining hole, and a restricted intermediate hole portion formed between and intercommunicating the first and second hole portions. The intermediate hole portion is narrower than the first and second hole portions. Each of the bows has a bow section adapted to be hung on the ear of a user, and a mounting shaft extending from one end of the bow section. The mounting shaft is formed with a retaining protrusion for engaging the bow retaining hole in a respective one of the opposite end portions of the lens frame, and a mounting protrusion opposite to the retaining protrusion for engaging the first hole portion of the bow mounting hole. The mounting shaft is inserted into the insert slot in a respective one of the opposite end portions of the lens frame, and is rotatable within the insert slot about an axis of the mounting shaft from a disengaging position to an engaging position. In the disengaging position, the retaining protrusion and the mounting protrusion are disengaged from the bow retaining hole and the bow mounting hole, respectively. In the engaging position, the retaining protrusion moves into and engages the bow retaining hole, the mounting protrusion moves into and engages the first hole portion of the bow mounting hole, and the respective one of the bows is pivotable about the vertical axis for folding toward and unfolding from the lens frame. The mounting protrusion on the mounting shaft passes through the second hole portion and the intermediate hole portion of the bow mounting hole when the mounting shaft rotates from the disengaging position to the engaging position.
REFERENCES:
patent: 5426473 (1995-06-01), Tiehm
Dang Hung Xuan
Rines and Rines
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