BACKGROUND An often occurrence in industrial use is that the lens and/or ear stems of a protective eyewear break, thus requiring a user to discard the entire eyewear and replace it with a new one. Another problem in the industry relates to the prevalence of standard protective eyewear that cannot accommodate comfortably different head sizes.

There is therefore a need for a protective eyewear for industrial use that can be easily mounted and/or dismounted in the event that one of its components is damaged and, at the same time, one which will provide the user with comfort.

One such eyewear has been described in U. S. Patent No. 5,987,653 issued November 23,1999 to the present assignee, which describes an eyewear for industrial use that comprises a deformable arcuate lens with a pair of temple entries at opposite ends thereof and a deformable brow frame shaped to fit the upper edge of the lens so as to be engageable therewith. The assembly of the temple pieces and the brow frame to the lens is effected by inserting the temple pieces through the entries of the lens and by effecting a snap engagement of the mid section of the brow frame to the upper edge of the lens. There is room for improvement.

SUMMARY The above-described and other problems and disadvantages of the prior art are overcome and alleviated by the present eyewear, wherein the components can be readily dismounted. This is achieved, in one exemplary embodiment, by using the nose piece to secure the assembly of the brow frame to the lens.

According to the above exemplary embodiment, the present disclosure relates to an eyewear which comprises: a unitary arcuate lens consisting of a pair of transparent sight regions and a bridging region between the sight regions; the lens displaying an upper edge extending along the sight and bridging regions, a lower edge extending along the sight and bridging regions and a pair of openings respectively provided at a distal upper end of the sight regions; a brow frame engaging the upper edge of the lens and opposite ends extending through the openings; means on the brow frame and on the upper edge of the lens cooperating to mount the frame to the upper edge of the lens; a detachable nose piece having first means to engage the frame and the nose portion and second means to engage the lower edge of the bridging region and parts of the sight portions to secure assembly of the brow frame to the lens; and a pair of ear stems mounted at respective opposite ends of the brow frame and rearwardly of the openings so as to be able to pivot between an inwardly folded positive to an outwardly ear contacting position.

In one exemplary embodiment, the upper edge of the lens includes recesses in the sight regions and the brow frame comprises hook means engaging these recesses.

In another exemplary embodiment, the nose piece has a groove which is adapted to receive therein the lower edge of the bridging region and some parts of the sight regions.

Other objects and further scope of applicability of the present invention will become apparent from the detailed description given hereinafter. It should be understand, however, that this detailed description, while indicating preferred embodiments of this invention, is given by way of illustration only since various changes and modifications within the spirit and scope of the invention will become apparent to those skilled in the art.

BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is an exploded perspective view of an eyewear made in accordance with the present invention; Figure 2 is a top perspective view of the eyewear components assembled; Figure 3 is a rear perspective view of the eyewear; Figure 4 is a top view of the eyewear; Figure 5 is a cross-sectional view taken along lines 5-5 of Figure 4; and Figure 6 is a cross-sectional view taken along lines 6-6 of Figure 4.

DESCRIPTION OF EXEMPLARY EMBODIMENTS Referring to Figure 1, there is shown an eyewear, generally denoted 10, comprising five components, namely, an arcuate lens 12, a brow frame 14, a pair of ear stems 16 and 18, and a nose piece 20.

Referring also to Figure 2, which shows the components in assembled form, the arcuate lens 12 includes a pair of transparent sight regions 22 and 24 which are of transparent material and a central bridging region 26 which may or may not be transparent.

The upper edge of each sight region 22,24 displays a rectangular-shaped recess 28,30 which the bridging region 26 displays a recessed area 32.

The upper distal end of each sight region 22,24 displays an oblong opening 34, 35.

The brow frame 14 comprises two sections 36 and 38 which are adapted to lie along the upper edge of the lens. The brow frame includes a recessed area 40 which is in registry with the bridging region 26 of the lens. The opposite ends 42 and 44 have a dimension such that they may extend through the respective openings 34,35 whereby the pivot pins 46 and 48 connecting the ear stems to the brow frame will be located rearwardly of the lens when the brow frame is mounted to the lens.

The brow frame 14 further includes a pair of rearwardly extending hooks 50 and 52 which have a width slightly less than the width of their corresponding recesses 28 and 30 of the lens (see Figure 6).

The ear stems 16 and 18 are pivotly connected at 46 and 48 to the respective ends of 42 and 44 of the brow frame to move between an inwardly folded position and a rearwardly extending ear contacting position.

The nose piece 20 has at it upper edge, a hook extension 60 having a width adapted to be positioned over area 32 of the bridging region 26. The central region 62 of the nose piece has a flat rear surface which is adapted to contact the flat surface area 40 of the brow frame 14. The nose piece also includes a narrow vertical curved rear wall 64 which, together with the rear face of the central region 62 defines a recess in which the lower edge 66 of the bridging region 26 may sit. This rear wall 64 downwardly extends along opposite sides (one of which is shown as 64a) so as to further serve as a backing against which may bear part of the lower edge 68 of the sight region 22 as well as part of the lower edge of the sight region 24.

Although the invention has been described above with respect to one specific form, it will be evident to the person skilled in the art that it may be refined and modified in various ways. It is therefore wished to have it understood that the present invention should not be limited in interpretation except by the terms of the following claims.