JPH1172752A - Semi-rimless frame - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve directly braze a bridge and wraparound endpiece to rim ends and to reduce a production cost by exposing rims from lens grooves without completely dropping the rims into the lens grooves. SOLUTION: Temples 5 are foldably connected via hinges 6 to the wraparound endpiece 4 and pads 7, 7 are mounted at the lower side of the bridge 3 on the inner side of the rims 2, 2. Plastic or metal filaments 8 are connected to both ends of the rims 2 to hold the lenses 9 fitted to the rims 2. In such a case, the rims 2 are larger in their wire diameter than heretofore and are partly fitted into the lens grooves without being completely dropped therein. Then, the other parts thereof are held exposed outside from the lens grooves. Since the rims 2 protrude from the lens grooves in such a manner, the bridge 3 and the wraparound endpiece 4 are directly brazed to the protruding parts. Then, the strength is enhanced, the occurrence of a lens crack is averted and the breakage of the plastic or metal filaments is averted.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an eyeglass frame provided with a high-tensile yarn such as a nylon yarn.

[0002]

2. Description of the Related Art Nyroll frames are known as one type of eyeglass frames. This nyrol frame is a frame that holds the lower half of the lens with water thread,
For example, it has a form as shown in FIG. The frame shown in the figure is only a basic form, and in fact it will be constructed with various designs, but the ends of the water thread (b) are fixed to both ends of the arc-shaped rim (a). And rim
The lens (c) is held by (a) and the water thread (b). The two rims (a) and (b) are connected by a bridge (d), and the outer rim is provided with a yoke (e) and (e) so that the vine can be folded through the hinges via hinges. It is connected to.

[0003] By the way, this nail roll frame is
In order to make (a) inconspicuous and widen the field of view, a rim wire having a thickness of about 0.6 mm is used, and the rim is often completely dropped into the lens groove. That is, the groove has a size that the water thread (b) can just fit.
However, the rim (a) that is adjusted to the outer diameter of the water thread is not enough as a frame because the rim wire is thin, and the rim wire is completely dropped into the lens groove. It is not possible to directly braze frame components such as bridges, yoro connecting vines, and butterfly legs for attaching nose pads.

Accordingly, a reinforcing piece (f) is once brazed to the tip of the rim, and a bridge is brazed to the reinforcing piece (f) located on the outer periphery of the lens to connect the two rims. Similarly, Yoroy
(E) is also attached via a reinforcing piece (f) brazed to the end of the rim. This reinforcing piece (f) has a higher strength than the thin rim wire, and as a result, the force acting on the frame is concentrated on the boundary (g) between the reinforcing piece (f) and the rim (a), and this part is Many cases are damaged. In particular, when the reinforcing piece (f) is brazed, the thin rim wire is softened due to the heat of brazing and the strength is reduced. Also, not only the rim wire but also the lens (c)
Cracks occur in (c).

On the other hand, a water thread (b) holding a lens (c)
Has its tip inserted and fastened to two holes formed in the reinforcing piece (f). A large tension acts on the water thread (b), and the water thread (b) does not come out of the hole by penetrating into the peripheral corner of the hole.As a result, the water thread (b) breaks. Become. FIG. 7 is an enlarged cross-sectional view of the portion B in FIG. 6, in which the water thread (b) breaks from the corner (h). Even if it does not break immediately, the corners (h) are hard to get into the water thread (b) and may break sometime.

[0006] Such a nyrol frame is displayed with a dummy lens fitted. When selling the nylol frame to a customer, it must be replaced with a lens suitable for the eye. It is necessary to replace the water thread (b) with the corner part (h) biting and scratching. The breaking force of the water thread (b) shown in FIG. 7 is about 3.6 kg, but this force is not the breaking force of the water thread itself, but the tension that breaks when the corner (h) cuts in. is there.

[0007]

The nyroll frame using such a thin rim wire has the above-mentioned problems. The problem to be solved by the present invention is this problem, and it is possible to directly braze a bridge or a yoke to the rim end without brazing a reinforcing piece to the rim end,
Further, the present invention provides a nyrol frame which has high strength, does not cause lens cracks, and does not cause breakage of a water thread.

[0008]

In the nylol frame of the present invention, both arc-shaped rims are connected via a bridge, and at the outer side of the rim, a yoroy for connecting a crane is brazed. In this case, the bridge and the yoke are brazed directly to the rim ends without providing a conventional reinforcing piece to form a frame. Here, a thick rim wire of about 1.0 mm is used instead of the conventional 0.6 mm thick rim wire. Here, the rim of the present invention is not limited to a rim wire having a circular cross section, and may use a rim wire having an elliptical cross section.

By using such a thick rim wire, the rim is not completely dropped into the lens groove, but a part of the rim is exposed to the outside of the lens groove. In this case, the width of the lens groove is set to 0.6 mm as in the related art, and a C surface or an R surface is formed at the entrance of the lens groove so that the rim wire can be stably fitted. In some cases. The thick rim wire increases the strength of the frame and can prevent the rim wire from being softened by heat during brazing.

On the other hand, the nail roll frame of the present invention is not limited to the case where the fastening means for the water thread is locked in the hole formed at the end of the rim as in the prior art. The ring provided at the end can be locked to the key. In addition to the case where the end of the water thread is directly locked to the key portion, the water thread end may be locked to the key portion via a locking tool formed with a key. The structure for forming the ring is not particularly limited, but it is common to form a loop at the tip and crimp with a metal fitting. In this case, the inner surface of the crimping fitting is made uneven to prevent the water thread from coming off.

By the way, a structure in which a key portion is provided at the rim end and a ring is formed at the end of the water thread, and the ring is locked to the key portion, regardless of the thickness of the rim wire, is applied to a conventional general nyrol frame. Can also be applied. When the ring is formed by caulking the end of the water thread, no scratch is generated on the surface of the water thread, and the tensile strength becomes extremely high. Hereinafter, embodiments according to the present invention will be described in detail with reference to the drawings.

[0012]

FIG. 1 shows a case in which a lens is fitted to a nyroll frame according to the present invention. A front frame 1 has rims 2 and 2 having an arc shape and a bridge 3 between the rims 2 and 2. The rims 2, 2 are brazed to the outside of the rims 2, 2. The vine 5 is foldably connected to the yoke 4 via a hinge 6, and nose pads 7, 7 are attached to the inside of the rims 2, 2 and below the bridge 3. A water thread 8 is connected to both ends of the rim 2 to hold a lens 9 fitted to the rim 2.

Although the basic form of the nyroll frame is the same, the rim 2 of the present invention has a wire diameter larger than that of the conventional rim, and is not completely dropped into the lens groove, but is only partially fitted. . FIG. 2 is an enlarged cross-sectional view taken along line AA of FIG.
It is stuck in. However, only a part is fitted, and the other part is exposed outside from the lens groove 10.

[0014] Here, a lens groove width L ₁ of FIG. (A) has become a well 0.6mm to conventional groove width, yet groove 10
Is chamfered to form a C-plane 11. The rim wire having an outer diameter of 1.0 mm fits on both C surfaces and is stable. In the case of one of the drawing (b), in order groove width L ₂ is which is the same size as the outer diameter of the rim line, the groove 12 has fits approximately half of the rim line. Therefore, in any case, the rim 2 protrudes from the lens grooves 10 and 12, and
The bridge 3 and the yoke 4 are directly brazed to the protruding portion.

[0015] Figure 2 lens groove 10 shown in (a) can be processed using conventional grooving cutter for the groove width L ₁ is 0.6 mm, chamfering is performed thereafter. FIG. 3 shows an embodiment showing a chamfering jig. The substrate 13 has a thickness of 0.5 to 0.6 mm and a bottom 14 thereof.
Are smooth arcs, and file plates 16, 16 are attached to the bottom surface on both sides at a fixed interval from the base 14, and the file plate 16 has an inclined file surface 15.

Therefore, the substrate 1 protruding from the file surface 15
If the bottom of 3 is fitted into the lens groove 10 and rubbed while pressing along the groove, the C surfaces 11 and 11 are processed. In this case, chamfering may be performed until the base 14 hits the groove bottom,
C-plane processing of a fixed size is performed. Therefore, the position of the screwed file plates 16, 16 is changed to change the position of the base 14.
By adjusting the distance between the C surface and the file surface 15, the size of the C surface can be changed.

On the other hand, the lens groove 1 shown in FIG.
In the case of No. ₂ , the groove width L2 is large, about 1.0 mm. Therefore, since a conventional groove cutter cannot process a groove having a large width at a time, a wide groove can be processed by shifting the cutter. However, in this case, there is no problem when the lens thickness (especially the outer peripheral thickness) is large, but this point must be taken into consideration because a relatively thin lens breaks the groove. In the present invention, a rim wire thicker than a conventional rim is used, and as a result, a frame having high strength and rigidity is obtained. For example, 0.6m
If a rim wire of 1.0 mm is used as compared with a rim wire of m, the sectional area becomes about 2.8 times, and the deformation resistance to an external force becomes about 7.7 times in relation to the second moment of area.

By the way, the water thread 8 fitted in the lens groove is connected by fixing both ends to the rim end. FIG. 4 is an enlarged view of a portion A in FIG. like,
A ring 18 at the end of the water thread is locked to a key portion 17 provided at the end of the rim. In order to form the ring 18, it is crimped by the metal fitting 19 so as not to come off. Of course, the key portion is not limited to the case where the rim end is formed by bending, but may be formed by pressing the rim end into a key shape as shown in FIG. 5 or by brazing key-shaped parts.

Similarly, in the case of the ring 18 formed at the end of the water thread, it is possible to form the loop by forming a loop as shown in FIG. Further, the present invention does not limit the connection form between the water thread end and the rim end, and may be inserted into a hole formed in the rim end and fixed as in the related art. In this case, it is possible to compress the rim end to provide a fixing hole to make it easier to form the hole.However, in the method of inserting the water line end into the hole and fixing it, the water line hits the corner of the hole and breaks In many cases, it is more stable to lock the key portion at the rim end via the ring 18.

When the water thread is inserted into the hole formed at the end of the rim and fixed as in the prior art, the weight is about 3.6 kg. When a ring is formed by caulking and this ring 18 is locked to the key portion 17 at the end of the rim, the weight becomes about 8.4 kg and the tensile strength is 2 kg.
Test results more than doubled. As described above, the nylol frame of the present invention fits only a part of the rim into the groove without completely dropping the rim into the lens groove. It is brazed, and the following effects can be obtained.

[0021]

The nyroll frame of the present invention is exposed from the lens groove without completely dropping the rim into the lens groove, so that the bridge or the yoke can be directly brazed to the end of the rim. In addition, the manufacturing cost is reduced.
In addition, since there is no reinforcing piece at the end of the rim as in the prior art, the design is refreshing, and the nylol frame is aesthetically preferable. Also, since the wire material of the rim is thick, the frame strength is high, and since there is no reinforcing piece, the strength is uniform, so there is no concentration of stress at the boundary between the reinforcing piece and the rim as before, and there is no cracking of the lens. Does not occur. Furthermore, by forming a ring at the end of the water line and locking the ring to the key provided at the end of the rim, the tensile strength of the water line becomes extremely high,
The lens can be stably held.

[Brief description of the drawings]

FIG. 1 shows a case where a lens is fitted to a nylol frame of the present invention.

FIG. 2 is an enlarged cross-sectional view taken along the line AA in FIG.

FIG. 3 is a jig for chamfering a lens groove.

FIG. 4 shows a case where a ring at the end of a water thread is locked to a key formed at the end of the rim.

FIG. 5 shows another specific example of a key portion provided at the rim end.

FIG. 6 is a conventional nail roll frame.

FIG. 7 shows a conventional structure in which a water thread is fixed by passing through a hole provided at the end of a rim.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Front frame 2 Rim 3 Bridge 4 Yoroi 5 Crane 6 Hinge 7 Nose pad 8 Water thread 9 Lens 10 Groove 11 C surface 12 Groove 13 Substrate 14 Bottom 15 File surface 16 File plate 17 Key part 18 Ring 19 Metal fitting

Claims (4)

[Claims] 1. A nyroll frame in which the upper half is held by a rim made of an arc-shaped metal wire and the lower half is held by a high-tensile thread such as a water thread. Part of it fits and the other part is exposed from the groove, and both rims are directly brazed and connected to the exposed part from the groove, and the same is directly brazed to the outside of the rim, A nyroll frame wherein a ring formed at the end of a high-tensile thread is locked to key portions provided at both ends of the rim. 2. A nyroll frame in which the upper half is held by a rim made of an arc-shaped metal wire and the lower half is held by a high-tensile thread such as a water thread. Part of it fits and the other part is exposed from the groove, and both rims are directly brazed and connected to the exposed part from the groove, and the same is directly brazed to the outside of the rim, A nylolle frame, characterized in that a key provided at both ends of the rim is locked with a locking member fixed to the end of the high-tensile thread. 3. A nyroll frame in which the upper half is held by a rim made of an arc-shaped metal wire and the lower half is held by a high-tensile thread such as a water thread, the rim wire is inserted into a lens groove. Part of it fits and the other part is exposed from the groove, and both rims are directly brazed and connected to the exposed part from the groove, and the same is directly brazed to the outside of the rim, A nylolle frame characterized in that a locking portion having a hole is provided at each end of the rim, and a high tension yarn end is inserted into the hole and locked. 4. A nyroll frame in which the upper half is held by a rim made of an arcuate metal wire and the lower half is held by a high-tensile thread such as a water thread. And a ring formed at the end of the high tension yarn is locked to the key portion.