Glasses with lens fastened by pivotal members

A pair of glasses includes a spectacles frame, a lens unit, and two pivotal members. A pivot hole is provided in each of first and second ends of the spectacles frame. The lens unit is detachably assembled on the spectacles frame and includes two snap-fit portions. Each pivotal member includes a swing arm and a pivot formed at the swing arm and held in a corresponding pivot hole, so that each pivotal member can make a pivotal rotation relative to the spectacles frame. The swing arm includes a locating slot at a lower end thereof. The lens unit is assembled on the spectacles frame when the snap-fit portions of the lens unit join the locating slots in the pivotal members. The lens unit can be disassembled from the spectacles frame when the snap-fit portions of the lens unit are separated from the locating slots in the pivotal members.

BACKGROUND OF THE INVENTION

1. Field of the Invention

The present invention relates to a pair of glasses and, more particularly, to a pair of glasses with a lens replaceable conveniently.

2. Description of the Related Art

In the era of material life promoted, people with novelty aspiration are fastidious about portable decorative objects. For example, sunglasses or leisure eyeglasses are popularized among persons who value the glasses aesthetically matching costumes. In this regard, a user who prefers versatile fancy sunglasses or leisure eyeglasses may change lenses in a pair of glasses frequently to match his/her mood or costumes but finally buy a new pair of glasses without cost effectiveness because lenses of the glasses are difficultly replaced.

In general, a pair of conventional glasses includes a spectacles frame, two lenses, and two temples pivotally fitted at both sides of the spectacles frame. The spectacles frame includes two lens grooves opened in an inner edge thereof in which the lenses are held. During installation of each lens, the lens should be forcibly embedded into one of the lens grooves according to elasticity of the spectacle frame in general. However, either a lens which is fragile usually or a spectacle frame could be damaged in an assembly/disassembly process.

There have been multiple conventional techniques for a pair of glasses which feature lenses replaceable conveniently and neither lenses nor a spectacle frame damaged. However, a removable lens uneasily or incorrectly fixed on a spectacles frame might be positioned with an auxiliary magnetic component which complicates structure of a pair of glasses.

BRIEF SUMMARY OF THE INVENTION

Thus, an objective of the present invention is to provide a pair of glasses on which a replaceable lens is fastened with pivotal members for simplified structure and lenses conveniently replaced

To achieve this and other objectives, a pair of glasses of the present invention includes a spectacles frame, a lens unit, and two pivotal members. The spectacles frame includes a first end, a second end, and a central portion between the first and second ends. A mounting adapter is formed at each of the first and second ends and includes a pivot hole. The lens unit is detachably assembled on the spectacles frame and includes two snap-fit portions. Each pivotal member includes a swing arm and a pivot provided at an upper end of the swing arm and held in the pivot hole in a corresponding mounting adapter to define an axis by which each of the pivotal members can make a pivotal rotation relative to the spectacles frame. An engaging body is formed at a lower end of the swing arm and includes a locating slot which can be engaged with or separated from one of the two snap-fit portions of the lens unit. The lens unit is fixed on the spectacles frame when the two snap-fit portions are engaged with the two locating slots of the two pivotal members. The lens unit can be disassembled from the spectacles frame when the two snap-fit portions are separated from the two locating slots of the two pivotal members.

In a preferred form, the lens unit includes a lens having a top and two lateral outer borders. The pivot hole is located near an internal end of the mounting adapter. Each of the outer borders is partially held in the internal end of the mounting adapter, and each of the two snap-fit portions is designed at a lower portion of one of the two outer borders of the lens. Two notches are opened in the lower portion of each outer border of the lens and indent from an edge of the outer border to define the snap-fit portion between the two notches. The engaging body includes two spaced chuck walls, an upper interconnecting portion bridging upper ends of the chuck walls, and a lower interconnecting portion bridging lower ends of the chuck walls. The locating slot is defined between the two chuck walls. The upper and lower interconnecting portions of each pivotal member are held in the two notches of the lens, respectively.

In another preferred form, the lens unit includes two lenses, and the spectacles frame is provided with a nose pad portion formed at a lower end of the central portion and including two lens support grooves. Each of the two lens support grooves is developed between the internal end of one of the mounting adapters and the nose pad portion along a bottom of the spectacles frame. Each of the lenses has an outer border and a top held in and engaged with a corresponding lens support groove of the spectacles frame. The two snap-fit portions are respectively designed at a lower portion of the outer border of the two lenses. Two spaced notches are opened in the lower portion of the outer border of each lens and indent from a edge of the outer border to define the snap-fit portion between the two notches. The engaging body includes two spaced chuck walls, an upper interconnecting portion bridging upper ends of the chuck walls, and a lower interconnecting portion bridging lower ends of the chuck walls. The locating slot is defined between the two chuck walls. The upper and lower interconnecting portions of each pivotal member are held in the notches of a corresponding lens, respectively.

DETAILED DESCRIPTION OF THE INVENTION

A pair of glasses10according to the preferred teachings of the present invention is shown inFIGS. 1 through 6of the drawings and includes a spectacles frame12, a lens unit14, two temples16, and two pivotal members18. The glasses10may be a pair of sunglasses, leisure eyeglasses, sports eyeglasses, protective goggles, nearsighted eyeglasses, farsighted spectacles, presbyopic glasses, etc. The temples16can be in the form of straps.

The spectacles frame12includes a first end20, a second end22spaced from the first end20in a longitudinal direction, a central portion24between the first and second ends20and22, and a lens support groove26in the bottom thereof for installation of the lens unit14. A mounting adapter28is formed at a lower end of each of the first and second ends20and22and includes an internal end30facing the central portion24. Two end of the lens support groove26are respectively extended to the internal ends30of the mounting adapters28along the bottom of the spectacles frame12. A pivot hole32is provided in each of the mounting adapters28and near the internal end30of the mounting adapter28. A slot34is formed in the internal end30of each mounting adapter28and in communication with a corresponding pivot hole32. In this embodiment, each of the mounting adapters28is provided with a raised engaging lug36in an external end thereof, and each temple16is pivotally connected to the engaging lug36of one of the mounting adapters28. In this embodiment, each of the temples16includes a recess40in a front end38thereof in which the engaging lug36of one of the mounting adapters28is held, and a connecting pin42penetrates the front end38of the temple16and the engaging lug36to join the temple16and the spectacles frame12, so that the temple16can make a pivotal rotation relative to the spectacles frame12according to an axis defined by the connecting pin42.

The lens unit14is detachably assembled on the spectacles frame12and includes one or two lenses. In this embodiment, the lens unit14includes a lens44covering a user's both eyes. The lens44includes a top46and two lateral outer borders48spaced in the longitudinal direction, each of which is partially held in the internal end30of a mounting adapter28. The top46is inserted into and join the lens support groove26in the spectacles frame12. Each of the outer borders48includes a snap-fit portion50at a lower portion thereof. In this embodiment, two notches52are opened in the lower portion of each outer border48of the lens44and indent from the edge of the outer border48to define the snap-fit portion50between the two notches52. Furthermore, a caulking groove54is prepared in an upper end of the top46of the lens44and joins a lower end of the central portion24of the spectacles frame12on which the lens unit14is assembled.

Each of the pivotal members18includes a swing arm56, and a pivot58is provided at an upper end of the swing arm56and held in and engages with the pivot hole32in a corresponding mounting adapter28to define an axis by which each of the pivotal members18can make a pivotal rotation relative to the spectacles frame12. A diameter of the pivot58is slightly greater than a width of the slot34, so that the pivot58can be forcibly extended through the slot34and held in a corresponding pivot hole32. The pivot58includes an enlarged portion60at an outer end thereof to prevent the pivot58separated from the pivot hole32. The swing arm56is provided with an engaging body62formed at a lower end thereof and including two spaced chuck walls64, an upper interconnecting portion66bridging upper ends of the chuck walls64, and a lower interconnecting portion68bridging lower ends of the chuck walls64. A locating slot70is defined between the two chuck walls64. When the lens unit14is assembled and fixed on the spectacles frame12, each snap-fit portion50of the lens44is inserted and held in the locating slot70of one of the pivotal members18, and the upper and lower interconnecting portions66and68of each pivotal member18are held in the two notches52of the lens44, respectively. Moreover, when the pivotal member18is moved outward (FIG. 6), the engaging body62of the pivotal member18is separated from a corresponding snap-fit portion50of the lens44, so that the lens unit14can be removed from the spectacles frame12.

The glasses10of the present invention features not only simplified structure but also the lens unit14replaced easily. Specifically, pivotal members18which are moved outward (FIG. 6) can be separated from the lens unit14for replacement of the lens44of the lens unit14from the spectacles frame12. On the other hand, the lens44of the lens unit14, which is assembled in the lens support groove26of the spectacles frame12first, can be securely fixed on the spectacles frame12with the pivotal members18moved inward and with the snap-fit portions50of the lens unit14joining the locating slots70of the pivotal members18.

FIG. 7illustrates a pair of glasses10in another embodiment. In this embodiment, the lens unit14includes two separate lenses44a, each of which covers a user's one eye. The spectacles frame12is provided with a nose pad portion72formed at the lower end of the central portion24and includes two lens support grooves26a, each of which is developed between the internal end30of one of the mounting adapters28and the nose pad portion72along the bottom of the spectacles frame12. Each of the lenses44ahas an outer border48aand a top46awhich is held in and engages with a corresponding lens support groove26aof the spectacles frame12. A snap-fit portion50is designed at a lower portion of the outer border48aand defined between two spaced notches52. When the lens unit14is assembled and fixed on the spectacles frame12, the snap-fit portions50of the lenses44aare respectively inserted in and engage with the locating slots70of the engaging bodies62of the pivotal members18. When the pivotal members18are moved outward, the engaging bodies62of the pivotal members18are separated from the snap-fit portions50of the lenses44a, and the lens unit14can be disassembled from the spectacles frame12.