A pair of screwless eyeglasses includes a lens assembly, two connecting rods, and two temples. The connecting rods extend respectively through two front slots in the lens assembly, and are inserted respectively into two rear slots in the temples. Two front stop units are connected respectively and fixedly to front end portions of the connecting rods, and abut respectively against two rear stop units fixed respectively within the front slots so as to prevent rearward removal of the connecting rods from the front slots. When the connecting rods rotate respectively about the front stop units toward each other so as to extend respectively through two notches in the lens assembly, the temples abut against each other.

BACKGROUND OF THE INVENTION

1. Field of the Invention

This invention relates to eyeglasses, and more particularly to screwless eyeglasses.

2. Description of the Related Art

Referring toFIG. 1, a pair of conventional eyeglasses1is shown to include a lens assembly11, two hinge members12connected to the lens assembly11by two upright screws13, and two temples14connected respectively to the hinge members12such that the angles of the temples14relative to the hinge members12can be adjusted.

The lens assembly11includes a top frame portion111, a lens portion112, and two front lugs113extending respectively and rearwardly from two opposite sides of the lens portion112. Each of the hinge members12includes two vertically spaced-apart rear lugs121, and a temple-retaining portion122. Each of the screws13extends through the corresponding front lug113of the lens assembly11and the rear lugs121of the corresponding hinge member12so that the hinge members12can rotate relative to the lens assembly11toward each other. Each of the temple-retaining portions122of the hinge members12is formed with a pivot hole123and a rearwardly extending resilient positioning plate124.

The temples14are disposed respectively behind the hinge members12. Each of the temples14includes an outer wall141, an inner wall142having a U-shaped cross-section and formed integrally with a rear portion of the outer wall141, a projection143extending inwardly from a front portion of the outer wall141and disposed rotatably within the pivot hole123in the corresponding hinge member12, and a plurality of positioning slots144formed in the rear portion of the outer wall141. The positioning plate124of each of the hinge members12engages a selected one of the positioning slots144in the corresponding temples14. As such, the temples14can be rotated respectively and forcibly about the pivot holes123in the hinge members12so as to adjust the angles of the temples14relative to the hinge members12. However, the above-mentioned conventional eyeglasses1suffer from the following disadvantages:(1) When the hinge members12are mounted to the lens assembly11, it is necessary to rotate the screws13relative to the lens assembly11and the hinge members12by a tool, such as a screwdriver (not shown).(2) The screws13may be loosened from the lens assembly11due to frequent rotation of the hinge members12relative to the lens assembly11, thereby resulting in separation of the lens assembly11and the hinge members12.(3) The screws13affect adversely the appearance of the eyeglasses1.

SUMMARY OF THE INVENTION

The object of this invention is to provide a pair of screwless eyeglasses including a plurality of parts that can be firmly joined together with ease so that undesired detachment of the parts can be prevented.

According to this invention, a pair of screwless eyeglasses includes a lens assembly, two connecting rods, and two temples. The connecting rods extend respectively through two front slots in the lens assembly, and are inserted respectively into two rear slots in the temples. Two front stop units are connected respectively and fixedly to front end portions of the connecting rods, and abut respectively against two rear stop units fixed respectively within the front slots so as to prevent rearward removal of the connecting rods from the front slots. When the connecting rods rotate respectively about the front stop units toward each other so as to extend respectively through two notches in the lens assembly, the temples abut against each other.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT

Referring toFIGS. 3,4, and5, the preferred embodiment of a pair of screwless eyeglasses according to this invention is shown to include a lens assembly2, a pair of left and right connecting rods3, and a pair of left and right temples4.

The lens assembly2includes a pair of interconnected left and right lens units21, a pair of left and right side plates22, and a pair of left and right mounting plates23. The left and right Bide plates22extend respectively, integrally, and rearwardly from the left and right lens units21. Each of the left and right mounting plates23has a U-shaped cross-section, and includes a pair of upper and lower horizontal walls231,231′ extending integrally and outwardly from a corresponding one of the left and right side plates22, and a vertical wall232having upper and lower ends formed respectively and integrally with the upper and lower horizontal walls231,231′ to define a front slot24therebetween. Each of the left and right side plates22further has a curved and forwardly concave rear end surface221, and a notch222formed in the rear end surface221and communicated with the corresponding front slot24. Two rear stop units are disposed respectively within the front slots24. Each of the rear stop units includes a pair of upper and lower projections233that extend respectively from a bottom surface of the upper horizontal wall231and a top surface of the lower horizontal wall231′. The left and right mounting plates23have curved and forwardly concave rear end surfaces234that are aligned with the rear end surfaces221of the left and right side plates22.

Each of the left and right temples4has a front end portion41for connection with the lens assembly2and the left and right connecting rods3, and a rear end portion42adapted to be disposed on an ear of the wearer (not shown) Each of the front end portions41is annular, and has two spaced-apart parallel vertical walls411that define a rear slot412therebetween, and a curved and forwardly convex front end surface413that abuts against the rear end surface221of a corresponding one of the left and right side plates22and that has a curvature approximate to those of the rear end surfaces221,234of the left and right side plates22and the left and right mounting plates23. Each of the rear slots412extends along a longitudinal direction of a corresponding one of the left and right temples4. Each of the vertical walls411has an inner surface414that is formed with a plurality of angularly equidistant positioning ribs415which are disposed in the corresponding rear slot412and which define a plurality of positioning grooves415′, each of which is formed between two adjacent ones of the positioning ribs415. Two rear retaining units are disposed respectively within the rear slots412in the left and right temples4. Each of the rear retaining units includes two aligned cylindrical grooves416that are formed respectively in inner surfaces414of the vertical walls411. Each of the positioning ribs415extends along a radial direction of the corresponding rear retaining unit.

Each of the left and right connecting rods3includes a front stop unit31and a uniform-width rod body32. The rod bodies32are configured as elongated vertical rectangular plates, extend respectively through the front slots24in the lens assembly2, and are respectively inserted into and confined within the rear slots412in the left and right temples4. Each of the rod bodies32has two opposite side surfaces321, each of which is formed with two parallel positioning ribs322that engage respectively two selected ones of the positioning grooves415′ in a corresponding one of the left and right temples4. Each of the positioning ribs322extends along a longitudinal direction of a corresponding one of the left and right connecting rods3.

The front stop units31are configured as vertical rods, and are formed respectively and integrally with and are disposed respectively in front of the rod bodies32. Upper ends of the front stop units31are disposed above those of the rod bodies32, and abut respectively against and are disposed respectively in front of the upper projections233. Lower ends of the front stop units31are disposed below those of the rod bodies32, and abut respectively against and are disposed respectively in front of the lower projections233. As such, the front stop units31can cooperate with the upper and lower projections233so as to prevent rearward removal of the left and right connecting rods3from the front slots24in the lens assembly2. Two front retaining units are disposed respectively on rear end portions of the left and right connecting rods3. Each of the front retaining units includes two aligned cylindrical tongues323that are formed respectively and integrally with the side surfaces321and that are received respectively, fittingly, and rotatably within the cylindrical grooves416in a corresponding one of the left and right temples4. As such, removal of the left and right temples4from the left and right connecting rods3can be prevented. Furthermore, each of the left and right temples4is rotatable forcibly about the corresponding cylindrical tongues323so as to adjust the angles of the left and right temples4relative to the left and right side plates22, as shown in FIG.6.

The left and right connecting rods3can rotate respectively about the front stop units31toward each other so as to permit the left and right temples4to turn inwardly from unfolded positions shown inFIG. 7to folded positions shown inFIG. 8, where the left and right connecting rods3extend respectively through the notches222in the left and right side plates22.

Because the curved and forwardly convex front end surfaces413of the left and right temples4abut against the curved and forwardly concave rear end surfaces221,234of the left and right side plates22and the left and right mounting plates23, the left and right temples4can be connected firmly to the lens assembly1. Furthermore, when the left and right temples4rotate relative to the lens assembly2, the front end surfaces413of the left and right temples4can move smoothly on the rear end surfaces221,234of the left and right side plates22and the left and right mounting plates23.