JPH0732619U - Lens fastening mechanism for rimless spectacles and fastening components used for it - Google Patents

Abstract

(57) [Summary] [Purpose] To provide a lens fastening mechanism for two-point type rimless spectacles that can reduce the number of components to improve work efficiency and prevent loosening of fastening screws, and a lens fastening component used therefor. To do. In a rimless spectacle in which a spectacle lens and a strap are fixed to each other with a bolt and a nut, a composite resin molded body formed by insert-molding the nut and having a washer portion on a lens contact side, and a bolt A means of fixing the spectacle lens by fastening is adopted. [Effect] The synthetic resin washer, nut, and synthetic resin cap are integrally formed, so the number of fastening parts and the number of assembly steps are reduced, and the efficiency of assembly work is greatly improved, and at the same time, a screw loosening prevention effect is also obtained. be able to.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a lens fastening mechanism for rimless spectacles and a lens fastening component used for the same. More specifically, by reducing the number of fastening components required for lens fastening, the work efficiency of lens fastening is greatly improved. The present invention relates to a new lens fastening mechanism and lens fastening parts for rimless spectacles that can be improved.

[0002]

[Prior art]

 Two-point rimless spectacles are spectacles in which left and right spectacle lenses are fastened with a bolt and a nut on a bridge strap with both ends of the bridge and a hinge strap provided at the tip of the hinge. Since it has no rim frame that surrounds the car, it has a wide field of view and is bright. It is also popular because of its light weight and sleek design.

However, the work of fastening the strap and the lens in the conventional rimless spectacles is very troublesome and the work efficiency is very poor. Since the bolts and nuts used to attach the lens are minute parts that are only a few millimeters, careful attention is required during assembly, and a synthetic resin washer is interposed between the attachment component and the lens to protect the lens. This is because the number of parts to be assembled increases because it is necessary to make them work.

As shown in FIG. 1, in conventional rimless spectacles, a bridge strap, a hinge strap S, and a lens R are attached to a synthetic resin washer in a fastening hole r formed at a required position of the lens R. It was fastened with bolt B and nut N via w ₁ and w ₂ . These washers w ₁ and w ₂ prevent damage to the lens due to rotation of the nut during fastening work, or damage to the lens at the fastening part due to the application of external force after assembly.

Further, in the case of conventional two-point type rimless glasses, when a synthetic resin cap (not shown in FIG. 1) is attached to the tip of the bolt B in order to cover the tip of the screw portion of the bolt B screwed into the nut N. There is. When such a synthetic resin cap is used, the tip of the screw part of the bolt B is covered, the appearance of the lens fixing part is improved, and at the same time it is possible to prevent the situation where the eyeglass wearer is injured by touching the tip of the screw part. The number of points will increase and the man-hours for assembly will also increase. In some cases, the washer w ₁ between the strap S and the lens R in FIG. 1 may be omitted in order to reduce the number of parts, but in any case, it takes a lot of time and effort to assemble the conventional rimless glasses. It is.

[0006]

[Technical issues to be solved]

 The present invention was made in order to eliminate the above-mentioned inconvenience in the conventional rimless spectacles. The rimless that can reduce the number of parts to improve the work efficiency and prevent the loosening of the fastening part. It is a technical subject to provide a lens fastening mechanism for eyeglasses and a lens fastening component used for the same.

[0007]

[Means adopted for solving the problem]

 The present invention is a rimless spectacle in which a pair of left and right spectacle lenses, a bridge strap, and a hinge strap are fixed to a spectacle lens at a required position with bolts and nuts, and nuts are insert-molded. The above problem was solved by adopting a synthetic resin molded body that is made up of the following to fasten a spectacle lens by fastening a compound nut with a washer on the lens contact side and a bolt. .

[0008]

【Example】

 Hereinafter, the present invention will be described based on embodiments shown in the accompanying drawings. In addition, FIG. 1 is an enlarged explanatory view of an essential part showing the configuration of a lens fastening part of conventional rimless eyeglasses, FIG. 2 is an enlarged explanatory view of an essential part showing the configuration of a lens fastening part of an embodiment according to the present invention, and FIG. It is a perspective explanatory view showing composition of a compound nut of a fastening part of the example.

In FIG. 2, reference numeral R is a pair of left and right spectacle lenses, reference numeral r is a fastening hole formed at a required position of the lens R, and reference numeral S is a fastening hole for fastening the lens R at both ends of the bridge. It can be a bridge strap that you have installed, or a hinge strap that is attached to the tip of the hinge. The lens R and the strap S are fixed to each other via the synthetic resin washer (reference numeral W) and the bolt (reference numeral B) and the composite nut (reference numeral 1).

The composite nut 1 is a synthetic resin molded body formed by insert molding a metal nut N having an internal thread corresponding to the bolt B. The washer portion 1 a is integrally formed on the lens contact side of the composite nut 1. Is formed in. The washer portion 1a prevents the metal nut N and the lens R from directly contacting each other, so that the lens R can be protected. In the present embodiment, the washer portion 1a is formed by taking out a cylindrical protrusion so as to be fitted into the fixing hole r, but a T having a similar cylindrical protrusion between the strap S and the lens R. If the mold washer W is interposed, this washer portion 1a does not need to be formed in a tubular shape.

Further, in the compound nut 1 of the present embodiment, in addition to the washer portion 1a, a tubular locking portion 1b having six fastening surfaces 1c, 1c, ... Since the diameter of the locking portion 1b is slightly smaller than the outer diameter of the male screw of the bolt B, if the bolt B is screwed into the locking portion 1b by using the fastening surface 1c, the elasticity of the synthetic resin causes the bolt B to move. Is firmly fixed and can prevent the screws from loosening due to vibration. Reference numeral 1d in FIG. 3 denotes three screw fitting grooves provided in the inner hole of the locking portion 1b. The size, the number, etc. of the screw fitting grooves 1d may be variously changed depending on the balance between the ease of screwing the bolt B into the locking portion 1b and the screw locking effect.

As described above, when the lens fastening mechanism according to the present invention is used, the bolt B and the compound nut 1 are the only essential parts for fastening the lens R and the strap S. The number of points can be significantly reduced, and the number of assembling steps is also reduced. That is, the lens B of the rimless eyeglasses can be fastened by a simple operation of inserting the bolt B into the bolt hole of the strap S and the fastening hole r of the lens R and then fastening it with the composite nut 1. It is possible to almost completely prevent loosening of screws in the fastening part.

[0013]

[Effect of the present invention]

 As described above with reference to the embodiments, in the present invention, the means for integrally forming the synthetic resin washer and the nut, which was necessary for the lens fastening of the rimless spectacles, was adopted. The number of parts and the number of assembly steps can be reduced, and the work efficiency of assembling rimless glasses can be greatly improved.

Further, if necessary, if the lens fixing part of the present invention in which the synthetic resin washer, the nut, and the loosening prevention part are integrally formed is used, the number of parts and the number of assembly steps are not increased. It is possible to easily manufacture rimless spectacles which have a screw loosening prevention function and whose screw tips do not damage the wearer.

[Brief description of drawings]

FIG. 1 is a main part enlarged explanatory view showing a configuration of a lens fastening part of conventional rimless spectacles.

FIG. 2 is an enlarged explanatory view of the essential parts showing the configuration of the lens fastening portion of the embodiment according to the present invention.

FIG. 3 is a perspective explanatory view showing a configuration of a compound nut of an embodiment according to the present invention.

[Explanation of symbols]

 R Eyeglass lens r Fastening hole S Bridge strap or hinge strap B Bolt N nut 1 Composite nut 1a Washer part 1b Loosening prevention part 1c Fastening surface

Claims (4)

[Scope of utility model registration request] 1. A pair of left and right spectacle lenses R, a bridge strap, and a hinge strap S are fastened with bolts B and nuts N at fastening holes r formed at required positions of the spectacle lenses R. In rimless spectacles, a spectacle lens R is fixed by fastening a compound nut 1 which is a synthetic resin molded body formed by insert molding of the nut N and has a washer portion 1a on the lens contact side, and the bolt B. A lens fastening mechanism for rimless eyeglasses characterized by the above. 2. A pair of left and right spectacle lenses R, a bridge strap and a hinge strap S are fastened by bolts B and nuts N at fastening holes r formed at required positions of the spectacle lenses R. In rimless spectacles, a synthetic resin molded body obtained by insert-molding the nut N, which has a washer portion 1a on the lens contact side and a fastening surface 1c on the outer circumference on the opposite side of the lens.
A lens fastening mechanism for rimless spectacles, characterized in that the spectacle lens R is fastened in a locking state by fastening the compound nut 1 having the above and the bolt B. 3. A pair of left and right spectacle lenses R, a bridge strap and a hinge strap S are fastened by bolts B and nuts N at fastening holes r formed at required positions of the spectacle lenses R. In rimless spectacles, the nut N is a composite nut insert-molded in a synthetic resin molded body, and the washer portion 1a is provided on the lens contact side.
A lens fastening part for rimless eyeglasses, characterized by being integrally provided with. 4. The nut N is a composite nut insert-molded in a synthetic resin molded body, and a locking portion 1b having a fastening surface 1c on the outer periphery is provided on the opposite side of the washer portion 1a so as to project. The lens fastening component for rimless spectacles according to claim 3.