Optics: eye examining – vision testing and correcting – Spectacles and eyeglasses – Brace arm or semi-rimless mounting
Patent
1990-07-17
1995-08-22
Sikes, William L.
Optics: eye examining, vision testing and correcting
Spectacles and eyeglasses
Brace arm or semi-rimless mounting
351 83, 351129, G02C 104
Patent
active
054445027
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
The present invention relates to an eyeglass frame and, more particularly, to an eyeglass frame which is arranged to secure a pair of rims by means of a wire.
BACKGROUND ART
A conventional eyeglass frame of this type is shown as an eyeglass frame 100 in FIG. 6. The eyeglass frame 100 is made of, for example, an NT alloy (shape memory metal), and comprises right and left rims 102 which support eyeglass lenses 101, respectively. Temples 104 are connected to the respective rims 102 by means of corresponding side joints 103, and a bridge 105 is secured to connect the rims 102. The bridge 105 has an inverted U shape and two ends 105a and 105b, and the ends 105a and 105b are connected to the respective rims 102 to support the same.
A wire which forms the rims 102 and the bridge 105 has a general thickness.
However, in the case of the aforesaid prior art eyeglass frame 100, since the bridge 105 is supported by a single wire, no sufficient strength can be obtained and the rims 102 are easily displaced and deformed by forces applied to the eyeglass frame 100. In particular, the strength of recovery from twisting is small. Also, in the case of an eyeglass frame in which the bridge 105 is secured to the rims 102 as shown in FIG. 6, once the bridge 105 is secured between the right and left rims 102, the rims 102 cannot be replaced by a different kind of rim irrespective of the demand of a user.
DISCLOSURE OF THE INVENTION
An object of the present invention is to solve the problems experienced with the above-described prior art eyeglass frame, that is, the problem that the strength of a bridge is so weak that a pair of right and left rims are easily deformed by forces applied to the eyeglass frame and, in particular, the strength of recovery from twisting is small. Another object of the present invention is to make it possible to incorporate a variety of parts which can meet the demands of individual users. An eyeglass frame according to the present invention is characterized by a groove formed in the outer periphery of each of right and left rims and a wire disposed in the groove and provided with a tightening portion in the middle of the wire, the outer peripheries of the right and left rims which are disposed inward of the loop wire being tightened by the tightening portion to secure the pair of right and left rims in position. With this arrangement, the strength of the bridge is improved, whereby the strength of recovery from twisting is particularly improved.
In addition, if rims of various designs are prepared with their tightening portions remaining loose, it is possible to meet the demands of individual users for a variety of designs.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is a front view showing an eyeglass frame according to the present invention;
FIG. 2 is a cross-sectional view of the eyeglass frame, taken along line A--A of FIG. 1;
FIG. 3 is an exploded explanatory view showing the eyeglass frame according to the present invention;
FIG. 4 is an exploded explanatory view showing the eyeglass frame according to the present invention;
FIG. 5 is an enlarged explanatory view showing the eyeglass frame according to the present invention; and
FIG. 6 is a plan view showing an eyeglass frame according to the prior art.
Mode for Carrying Out the Invention
An embodiment of the present invention will be described below with reference to the accompanying drawings. FIG. 1 is a front elevational view showing an eyeglass frame 1 according to the present invention, and comprises two right and left plastic rims 2. Each of the rims 2 has an upper groove 3 and a lower groove 4. The upper groove is a groove for receiving an NT alloy wire 6 which serves as a wire to be described later, while the lower groove 4 is formed to receive a substantially circular lens 5 (refer to FIG. 2).
The NT alloy wire 6, which is a wire made of, for example, an NT alloy, is disposed around the periphery of the pair of rims 2. The NT alloy wire 6 has a configuration which is the same as the configuration of the rims s
REFERENCES:
patent: 3515468 (1968-10-01), Mitchell
patent: 4550989 (1985-11-01), Hafner
patent: 5135296 (1992-08-01), Lindberg et al.
Mai Huy
Murai Co., Ltd.
Sikes William L.
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