AU2002247220A1

AU2002247220A1 - Eyewear

Info

Publication number: AU2002247220A1
Application number: AU2002247220A
Authority: AU
Inventors: Luc Blanchette; Martin Pernicka
Original assignee: 3M Innovative Properties Co
Current assignee: 3M Innovative Properties Co
Priority date: 2001-02-23
Filing date: 2002-02-25
Publication date: 2003-03-06
Anticipated expiration: 2022-02-25

Description

EYEWEAR

FIELD OF THE INVENTION

The present invention pertains to an eyewear of the type comprising a lens and a pair of detachable ear stems.

BACKGROUND OF THE INVENTION

There exists, at present, some optical devices which comprise an unitary arcuate lens and a pair of detachable ear stems extending from opposite lateral sides of the lens. In most cases, such as illustrated in U.S. Patent No. 5,249,001 issued September 28, 1993 to Jannard, there are additional components needed to secure the ear stems to the lens, such as pins, which must be removed whenever it is desired to replace ear stems or a damaged lens.

OBJECTS AND STATEMENT OF THE INVENTION

It is an object of the present invention to provide an eyewear which consists solely of three components, namely, a lens and a pair of ear stems, the latter being easily detachable from the lens.

It is also an object of the present invention to provide an eyewear in which the pair of ear stems are mounted directly to the lens without any additional components.

The present invention therefore relates to an eyewear which comprises a unitary arcuate lens having its opposite lateral sides receiving a pair of detachable ear stems which are adapted to move from an inwardly folded position to an outwardly ear contacting position. The lens displays, at each lateral side, an opening and a stem connecting portion which defines a hinge element and forms an integral part of the lens. proximal end portion of the ear stem defines a U-shaped recess having a constricted entry and being engageable with the hinge element. This proximal end has some resiliency enabling a snap-in engagement and a snap-out disengagement of the ear stem directly onto and from the lens. No additional component is required to this three-piece eyewear.

In one exemplary embodiment, means are provided to limit the outward movement of the ear stem to its ear contacting position.

In another exemplary embodiment, a U-shaped recess is defined by a pair of branches, one of the branches being longer than the other branch and forming part of a limiting means.

In another form of the invention, the hinge element has a generally cylindrical shape, but includes a longitudinal projection on its outer wall to thereby provide a restrictive movement of the ear stem during passage between the folded position to the outwardly extending position, or vice-versa. Other obj ects and further scope of applicability of the presently disclosed eyewear 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.

IN THE DRAWINGS

Figure 1 is a perspective view of an eyewear made in accordance with the present invention;

Figure 2 is a side elevational view of the eyewear; Figure 3 is a cross-sectional view taken along lines 3-3 of Figure 1;

Figure 4 is a perspective view of the eyewear showing one ear stem in the inwardly folded position; and

Figure 5 is a cross-sectional view taken along lines 5-5 of Figure 4.

DESCRIPTION OF EXEMPLARY EMBODIMENTS Referring to Figure 1, there is shown an eyewear, generally denoted 10, comprising three components, namely, a unitary arcuate lens 12 made of transparent transparent plastic material and a pair of ear stems 14 and 16 which are identical in construction and which are mounted to respective opposite lateral sides 12a and 12b of the lens.

The ear stems 14 and 16 being identical in shape, a description will be given with respect to one ear stem only.

Referring also to Figures 2, 3 and 4, the ear stem 14 comprises an ear contacting distal end portion 18 and a proximal end lens contacting portion 20. The lateral side portion 12a of the lens 12 comprises an oblong-shaped recessed area 22 displaying a rectangular-shaped opening 24 and a circular opening 26. To one side of the opening 24, remote from the opening 26, is a vertically extending column 28 which, as illustrated in Figure 3, has a generally cylindrical shape except for a longitudinal projection portion 28a on its outer wall. As explained further hereinbelow, the column 28 serves as a hinge element for the ear stem 14; it forms an integral part of the lens. The proximal end 20 of the ear stem defines a U-shaped recess defined by a pair of branches 30 and 32. Branch 30 is shorter than branch 32 and has an enlarged extremity 34 which defines with the opposite inner face 36 of the longer branch 32 a constricted recess entry which is slightly smaller than the overall outer diameter of the cylindrical-shaped hinge element 28. Branch 32 has an oblong shape corresponding to the oblong shape of the recessed area 24 so as to be lodged therein when the ear stems are in the ear contacting position.

The inner face of the longer branch 32 displays a dome-shaped protuberance 38 which is so dimensioned as to be received in the circular opening 26 of the lens when the ear stem is in its ear contacting position. Referring to Figure 5, the mounting of the ear stem to the lens is indicated by arrow 50 whereby the U-shaped recess at the proximal end of the ear stem engages the hinge element 28 of the lens. The material of the ear stem, at least in the proximal end portion thereof, is resilient, such as plastic material, so that this engagement of the ear stem to the hinge element may be carried out by forcing entry of the branches so that the latter will slightly open to allow lodging of the hinge element in the receptive area 52 between the branches. This enables a snap-in engagement of the ear stem to the lens or, in a direction opposite to arrow 50, a snap-out disengagement of the ear stem from the lens. The ear stem is limited, in its outward movement, by branch portion 32 contacting the recessed lens area 24. This entry of protuberance 38 in the circular opening 25 also assists in securing the ear stem in its outward position. To maintain the ear stem in either the inwardly folded position of Figure 4, or the ear contacting position shown in Figure 1, the presence of the projection 28a on the outer wall of the hinge element 28 will prevent free pivotal movement of the ear stem due to the larger surface area of the hinge element with the inner face of the shorter branch such as illustrated in Figures 3 and 5.

As can be seen in Figure 5, the branch 30 has its end portion extending through the opening 24 when the ear stem is in its inwardly folded position.

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.

Claims

1. Eyewear comprising an unitary arcuate lens having opposite lateral sides and a pair of detachable ear stems mounted at said opposite lateral sides of said lens and being adapted to move from an inwardly folded position to an outwardly ear contacting position; said lens displaying, at each said lateral side, an opening and a stem connecting portion located adjacent said opening and defining a hinge element forming an integral part of said lens; each said ear stem having an ear contacting distal end portion and a lens engaging proximal end portion; said proximal end portion defining a U-shaped recess engageable with said hinge element; said recess displaying a constricted entry and being formed of resilient material to thereby enable a snap-in engagement and a snap-out disengagement; said hinge element and said opening allowing said proximal and of said ear stem to move from said folded position to and from said outwardly ear contacting position.

2. Eyewear as defined in claim 1, further comprising means for limiting outward movement of said ear stem to said ear contacting position.

3. Eyewear as defined in claim 2, wherein said U-shaped recess is defined by a pair of branches, one of said branches being longer than the other; said limiting means consisting of said longer branch contacting said lens.

4. Eyewear as defined in claim 3, wherein said longer branch comprises a protuberance on an inner face thereof; said lens including, adjacent said opening remote from said hinge element, a second opening to receive said protuberance on said longer branch therein.

5. Eyewear as defined in claim 1, wherein said hinge element has a generally cylindrical shape including a longitudinal projection on its outer wall to thereby provide restrictive movement of said ear stem during movement between said folded position and said outwardly extending position.

6. Eyewear as defined in claim 1 , wherein a portion of said shorter branch extends in said opening when said ear stem is in said inwardly folded position.