JP3010853U - Mounting bush for eyeglass lenses - Google Patents

Abstract

(57) [Abstract] [Purpose] A conventional bush for attaching a spectacle lens that can securely prevent bending of a screw that is caused during screwing work and that can be easily attached and tightened. provide. A mounting bush 6 is composed of an annular body 6a that is detachably press-fitted into a connecting hole 1a of an eyeglass lens 1 and a step portion 6b formed on the outer periphery of the annular body 6, and the step portion is formed. 6b is preferably formed so as to match the inner surface (curved surface) of the spectacle lens 1, in other words, to have a thickness (tapered) that gradually increases from the outer end to the inner end. As a result, the annular body 6 is inserted into the connection hole 1a of the spectacle lens 1.
Only by fitting a, the upper surface side of the stepped portion 6b is closely seated on the inner surface of the spectacle lens 1, and the connection hole 1a and the screw hole 6c can be arranged coaxially, so that provisional indication, strong myopia, etc. Even in the case of the spectacle lens, the bending of the connecting screw due to the tightening of the nut can be prevented as in the conventional case.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an improvement of a mounting bush of a spectacle lens, and more specifically, it is suitable for a lens such as so-called strong myopia in which the difference between the front curvature and the rear curvature of the lens is large, and can be easily caused when screwing. The present invention relates to a mounting bush of a spectacle lens, which is useful for preventing bending of various connecting screws.

[0002]

[Prior art]

 Conventionally, as the rimless spectacles using a mounting bush, for example, one having a configuration disclosed in Japanese Utility Model Laid-Open No. 4-63419 is known as a conventional example. As shown in FIG. 7, this conventional rimless spectacles includes left and right spectacle lenses 1, a bridge portion (not shown) that connects the left and right spectacle lenses 1, and side edges of the left and right spectacle lenses 1. The left and right temple parts 4 are attached to the respective parts, and the left and right spectacle lenses 1 and the bridge part and / or the temple part 4 are screwed by bolts 5 and nuts 6.

Further, as shown in FIG. 8, the inner portions of the spectacle lens 1 are directly connected to each other by a bridge member (not shown), and a connecting member 20 such as a wisdom member which is pivotally attached to the temple tip is bendable. The rimless spectacles directly attached to the spectacle lens 1, wherein the connecting member 20 has an abutting portion 20a that abuts the lens peripheral surface, and a concave lens surface when the abutting portion 20a abuts the lens peripheral surface. A fixed projection 20b that projects inward from the lens on the side, and a V-shaped groove 8 that expands from the outer end toward the inner end is provided between the fixed projection 20b and the lens concave surface. The V-shaped groove portion 8 is formed so that the front surface abuts on the concave surface of the lens and the rear surface abuts on the fixed projection 20b, and the wall thickness increases from the outer end to the inner end. Elastic resin mounting bush (packing 6) is interposed, and the connecting screw 5 is inserted through an insertion hole provided in the spectacle lens 1, the mounting bush 6, and the fixed protruding piece 20 and having the same hole center. There was rimless spectacles in which the amount of compression of the mounting bush was made variable by changing the amount of tightening of the nut 7 screwed into the threaded portion projecting to the 0 side or the spectacle lens 1 side (Japanese Utility Model Laid-Open No. 6-50027). reference).

[0004]

[Problems to be solved by the device]

 However, among the above-mentioned conventional examples, in the mounting bush disclosed in the rimless spectacles of Japanese Utility Model Laid-Open No. 4-63419, the difference between the front surface curvature and the rear surface curvature of the spectacle lens 1 is particularly large. When using a lens for high myopia or the like, there is a problem that the connecting screw 5 is bent due to the difference in the thickness of the lens 1 during the screwing work (specifically, when the nut 7 is tightened). (Refer to Fig. 7 (b)).

Further, in the mounting bush disclosed in the rimless spectacles of Japanese Utility Model Laid-Open No. 6-50027, which will be described later, it is easy to finely adjust the maximum open state of the temple according to the individual spectacle wearer. Although it has the advantage that it can be carried out, the mounting bush (packing material) 6 rotates during the screwing operation, so that the engaging portion 6d is provided on the surface of the mounting bush 6 corresponding to the fixed protrusion 20. It was troublesome to assemble it, because it had to be provided and stopped.

The present invention has been made in view of the above problems, and even if the lens has a large difference between the front surface curvature and the rear surface curvature of the lens, that is, a so-called strong myopia lens or the like, An object of the present invention is to provide a bush for mounting a spectacle lens, which can reliably prevent the bending of the screw that is caused during the screwing work, and which can be mounted and tightened easily and firmly.

[0007]

[Means for Solving the Problems]

 In order to solve the above-mentioned conventional problems and achieve the intended purpose, the structure which is the gist of the present invention is a mounting bush mounted in a connecting hole of an eyeglass lens, wherein the mounting bush is the connecting hole. An attachment bush of an eyeglass lens comprising an annular portion fitted in the inner portion and a step portion provided outside the annular portion and having different thicknesses, and by extension, the step portion is an eyeglass lens. It exists in the mounting bush of the spectacle lens that is tapered to match the curved surface of the.

Further, it is preferable that the annular portion is formed in a non-rotatable shape with respect to the connection hole of the spectacles, and further, the mounting bush is tightened with a nut having a concave portion such as an inner peripheral tapered surface. Preferably.

[0009]

[Action]

 The spectacle lens mounting bush of the present invention configured as described above includes the annular portion fitted in the connection hole and the stepped portion having a different thickness, which is externally provided in the annular portion. The spectacle lens can be easily positioned in the connection hole.

Further, since the step portion is formed in a tapered shape so as to match the curved surface of the spectacle lens, the connecting hole of the spectacle lens and the screw hole of the mounting bush can be simplified. It can be arranged concentrically.

Further, if the annular portion is formed into a shape that cannot rotate with respect to the connecting hole of the eyeglasses, the mounting bush once inserted into the connecting hole can be easily attached even when tightening the nut. It does not rotate, and the joining with the spectacle lens is ensured.

If such a mounting bush is tightened with a nut having a concave portion such as an inner peripheral tapered surface, the bottom side of the mounting bush is compressed by the pressing action based on the shape of the concave portion, and the connecting screw is , Will be tightened more strongly. Hereinafter, the present invention will be described in more detail with reference to embodiments.

In the present specification, the “mounting bush” is arranged in the connection hole of the spectacle lens to prevent the connection screw from rotating, and is limited to the shape, size, etc. shown in this embodiment. Not a thing.

[0014]

【Example】

 Next, an embodiment of the present invention will be described with reference to the drawings. For the sake of easy understanding, the same parts as those of the prior art will be described with the same reference numerals. In the figure, A is a connection structure for rimless glasses that uses a mounting bush according to the present invention, and this connection structure A is, as shown in FIG. , And a temple 4 foldably connected to the wisdom 2 via a hinge 3 (see FIG. 2).

The spectacle lens 1 is made of glass or plastic and has a square connecting hole 1a formed at a predetermined position. The connecting hole 1a is screwed with a connecting screw 5 to be described later that detachably attaches the tip 2, and the connecting hole 1a may have a square shape, a circular shape, a polygonal shape, or the like. Examples thereof include an elliptical shape, and it is preferable that the connecting screw 5 is perforated in a shape that can be attached to and detached from the connecting screw 5 in a non-rotatable manner.

Further, the tip 2 is bent and formed in a substantially hook shape, and a round hole 2a which is aligned with the connecting hole 1a of the lens 1 is formed on the tip side. The connecting screw 5 is inserted from the front side into the round hole 2a, and the nut 7 is attached to the free end of the connecting screw 5 projecting to the back side of the lens 1 via the mounting bush 6. The two members (the spectacle lens 1 and the wisdom 2) are firmly connected to each other by screwing and tightening.

Needless to say, a washer (not shown) made of synthetic resin or the like may be interposed between the spectacle lens 1 and the connecting screw 5 if necessary.

On the other hand, the hinge 3 is composed of a conventional hinge mechanism and holds the temple 4 so that it can be bent only in the inward direction. Incidentally, as the hinge 3, a connecting mechanism may be adopted in which the free end side of the wisdom 2 is bent and the temple 4 is rotatably supported so as to eliminate the need for a conventional hinge mechanism.

The temple 4 is made of an appropriate material such as nickel alloy or titanium, and is flexibly connected to the free end side of the tip 2 via a hinge 3.

Further, although the connecting screw 5 uses a conventional screw, an angular shaft portion (not shown) fitted in the connecting hole 1a of the spectacle lens 1 and the angular shaft are used. You may use the screw which consists of the screw shaft (not shown) integrally or replaceably provided in the free end side of the part.

On the other hand, the mounting bush 6 is formed of a synthetic resin material such as urethane, and has an annular body 6a that is detachably press-fitted into the connection hole 1a of the spectacle lens 1, and the annular body. 6 and a step portion 6b formed on the outer periphery of

The annular body 6a has a shape (rectangular shape) that is detachably fitted into the quadrangular connection hole 1a formed in the spectacle lens 1 and is non-rotatably fitted, and extends in the axial direction. A screw hole 6c into which the connecting screw 5 is inserted is formed (see FIG. 3).

Further, as shown in FIGS. 3 and 4, the stepped portion 6b is aligned with the inner surface (curved surface) of the spectacle lens 1, that is, the thickness gradually increases from the outer end to the inner end. Is shaped so as to increase (tapered).

In the mounting bush of the present invention having such a structure, the annular body 6a is simply fitted into the connecting hole 1a of the spectacle lens 1 so that the upper surface of the stepped portion 6b is located on the inner surface of the spectacle lens 1. Since it sits closely (see FIG. 1) and the connecting hole 1a and the screw hole 6c can be arranged coaxially, the provisional rule is that the spectacle lens 1 has a large difference between the front curvature and the rear curvature, so-called strength. Even a spectacle lens for myopia or the like can prevent the connection screw from being bent by tightening a nut as in the conventional case.

The present invention is not limited to these embodiments, and the design can be modified freely within the scope of the object of the present invention, and the present invention includes all of them. For example, when mounting the mounting bush 6, tighten with a nut 7A having an inner peripheral taper surface 7a as shown in FIG. 5 or a nut 7B having an annular recess 7b as shown in FIG. Is good. This is because the bottom side of the mounting bush 6 is compressed by the pressing action of the taper surface 7a and the annular recess 7b, and is more tightly screwed onto the connecting screw 5.

Further, in these examples, the connecting screw 5 and the like are inserted from the front side of the spectacle lens 1, but the present invention is not limited to this, and the fixing screw is fixed from the rear side of the spectacle lens 1. It is also good.

[0027]

[Effect of device]

 The mounting bush of the present invention configured as described above includes the ring-shaped portion fitted in the connection hole and the stepped portion externally provided on the ring-shaped portion and having different thicknesses. The effect is that the mounting bush for the lens can be positioned and seated easily and reliably.

Particularly, since the step portion is formed in a tapered shape so as to match the curved surface of the spectacle lens, the connecting hole of the spectacle lens and the screw hole of the mounting bush can be easily and concentrically arranged. Therefore, even if the eyeglass lens has a large difference between the front surface curvature and the rear surface curvature, so-called strong myopia, etc., it is possible to easily prevent the connecting screw from being bent by tightening the nut. It has an excellent effect that it can be firmly screwed and tightened.

Furthermore, if the annular portion is formed into a shape that cannot rotate with respect to the connection hole of the eyeglasses, the mounting bush once inserted into the connection hole can be easily rotated even when tightening the nut. It has an excellent effect that it does not move and is securely joined to the spectacle lens.

Further, when such a mounting bush is tightened with a nut having a recess such as an inner peripheral tapered surface, the bottom side of the mounting bush is compressed by the pressing action based on the shape of the recess, and the connecting screw is used. Since it is strongly tightened, it has the effect of preventing the nut from loosening and allowing more firm screw tightening.

As described above, according to the present invention, even if the lens has a large difference between the front surface curvature and the rear surface curvature of the lens, that is, so-called strong myopia, the bending of the screw that is caused during the screwing operation is prevented. Not only can it be reliably prevented, but mounting and screw tightening can be done easily and reliably, and since the structure is simple, it can be supplied to users as a low-price product suitable for mass production.

[Brief description of drawings]

FIG. 1 is a sectional view of an essential part showing a mounting state of a mounting bush according to the present invention.

FIG. 2 is an assembly exploded view showing a connecting structure of a spectacle lens and a temple.

FIG. 3 is a perspective view of a mounting bush used in this embodiment.

FIG. 4 (a) is a front view of the mounting bush shown in FIG.
4B is a plan view of the same, and FIG. 4C is a bottom view of the same.

FIG. 5 is an explanatory view showing another mounting method of the mounting bush.

FIG. 6 is an explanatory view showing another mounting method of the mounting bush.

FIG. 7 is an explanatory view showing a conventional mounting bush.

FIG. 8 is an explanatory diagram showing another conventional example.

[Explanation of symbols]

 1 spectacle lens 1a connection hole 2 wisdom 2a round hole 2b reduced diameter part 2c screw hole 3 hinge 4 temple 5 connection screw 6 mounting bush 6a annular body 6b step 6c screw hole 7 nut

Claims (4)

[Scope of utility model registration request] 1. A mounting bush mounted in a connecting hole of a spectacle lens, wherein the mounting bush includes an annular portion fitted in the connecting hole, and a step portion externally provided in the annular portion and having a different thickness. A bush for mounting a spectacle lens, characterized by comprising: 2. The mounting bush of the spectacle lens according to claim 1, wherein the step portion is formed in a tapered shape so as to match the curved surface of the spectacle lens. 3. The mounting bush of the spectacle lens according to claim 1, wherein the annular portion has a shape that cannot rotate with respect to the connection hole of the spectacles. 4. The mounting bush according to claim 1, wherein the mounting bush is tightened with a nut having a recess such as an inner peripheral tapered surface.