Optics: eye examining – vision testing and correcting – Spectacles and eyeglasses – Temples
Patent
1990-05-07
1992-02-11
Bovernick, Rodney B.
Optics: eye examining, vision testing and correcting
Spectacles and eyeglasses
Temples
351122, 351123, G02C 518
Patent
active
050871170
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
The invention concerns a side-member for spectacle frame which comprises a narrow rod terminating in an ear part broadened relative to the rod.
In spectacle frames the spectacle mount is usually connected by means of two hinges with folding side members each.
Each of the two side-members comprises an elongated rod extending to a hook-like ear part. The ear part of the side-member is usually broadered in order to form a surface to be applied against the head of the wearer, behind his ear. During the fitting of a spectacle the ear pieces in particular must be deformed so that they are adapted to the shape of the skull of the wearer, thereby assuring the secure seating of the spectacle, without the formation of pressure points.
The deformation of the end pieces of that spectacle required for the purpose is made difficult by the fact that since the ear parts are usually broad and thus also rigid. Narrow ear pieces, which are also customary, are easier to deform, but apply a higher pressure and may therefore be uncomfortable to wear.
In the case of a known spectacle side-member (EP-A-202 556) the ear piece consists of two spaced apart elongated parts, i.e. an outer, rigid part and an inner strip applied against the ear of the user, said strip being soft and flexible in the fashion of a cord. The lateral pressure applied to the head of the user by the ear piece is concentrated on a small part and is not distributed over a broader ear piece.
In another known spectacle side-member (FR-A-2 534 387), the ear part is over most of its length in the form of a thin metallic inner part with a plastic covering. Only at the outermost end are two openings provided in the rigid inner part, but their length relative to the entire ear part is very small. The plastic coating, on the other hand, has no openings.
In the case of a known side-member for a spectacle frame of the aforementioned type (DE-U-8 336 526) the ear part also has over the major part of its length only a small metallic inner part covered by a soft plastic, in order to provide a softer contact surface against the head of the user. Only at the extreme end of the of the metallic inner part is an eye provided as an opening also covered with a soft plastic. The eye widens the end of the ear piece and facilitates the deformation of the soft plastic material in this area when wearing the spectacle. However, the deformability of the ear piece during the adaptation of the spectacle is hardly affected by this; the expanded contact surface at the head of the user is obtained exclusively by the use of a soft plastic material.
It is therefore the object of the invention to provide a side-member for a spectacle frame of the aforementioned generic type, that is readily deformed for fitting, but which also assures a favorable distribution of the pressure forces.
SUMMARY OF THE INVENTION
This object is attained according to the invention in that the side-member comprises at least two narrow, elongated spars, connected with each other at their ends, but otherwise spaced apart to form therebetween.
The two spaced apart spars distribute the pressure force applied by the spectacle to the head of the wearer in a manner such that the user senses it as distribution over a wide surface of the pressure force. As the cross sectional area of the two spars is relatively small, the end of the ear piece may be easily deformed in any direction, so that optimal adaptation is possible.
Preferably, the two spars are connected at their outer ends to form an uninterrupted flat piece. The formation of this uninterrupted flat piece creates in the area of the outermost end of the side-piece a usually broader uninterrupted supporting surface, which is especially favorable relative to the transfer of force. The fact that this uninterrupted outermost end of the side-member is less deformable than the area divided into the two spars is not a disadvantage, as the flat piece at the end of the side-piece needs to be deformed little or not at all. For the most part, deformati
REFERENCES:
patent: 460576 (1891-10-01), Halbe
patent: 1833792 (1931-11-01), Pfaus et al.
patent: 4563066 (1986-01-01), Bononi
patent: 4925291 (1990-05-01), Anger et al.
Bovernick Rodney B.
Ryan J. P.
LandOfFree
Side-member for spectacle frames does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Side-member for spectacle frames, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Side-member for spectacle frames will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-778494