JPH0244263Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a simple screw for eyeglass frames that can be used for repairing lost eyeglass frame screws.

[Conventional technology]

Generally, eyeglass frames have six small screws, two each in three places: the nose pad, the lens mount, and the temple connection. It may come loose or be lost.

[Problem that the invention attempts to solve]

However, the screws used in eyeglass frames are very small, so a special small screwdriver is required to retighten the screws, and if you don't have that screwdriver on hand, you won't be able to tighten the screws. Ta. Also, the size of the screws may vary depending on the type and manufacturer of the eyeglass frame, so it is difficult to obtain screws of the same size, so if you lose a screw, you will have to go to an eyeglass store and have it repaired. You may not be able to wear glasses when there is no eyeglass store nearby or when the eyeglass store is closed or closed.
It was extremely inconvenient.

This invention was proposed in view of the above-mentioned conventional situation, and even if the types and manufacturers of eyeglass frames are different,
To provide a simple screw for eyeglass frames that is extremely convenient in practice and can be tightened in place of a loosened or lost screw without requiring a special screwdriver.

[Means for solving problems]

In order to solve the above-mentioned problems, the present invention combines a large-diameter knob part and a multi-stage threaded shaft, which extends from the shaft end of the knob part in the axial direction and whose diameter is gradually narrowed, into a soft synthetic material. The present invention is characterized in that the simple screw for eyeglass frames is formed by integrally molding resin.

[Effect]

The simple screw for eyeglass frames of the present invention is constructed as described above, so if the screw on the eyeglass frame becomes loose or lost, insert the screw shaft of the simple screw for eyeglass frames into the screw hole and remove the screw from the knob. Just hold it and screw it in firmly. Then, the stepped part of the screw shaft, which has a slightly thicker diameter that exactly corresponds to the dimensions of the screw hole, enters the screw shaft while being screwed in, cutting into the threads of the screw hole while cutting into the threads, and exits to the opposite side. It will stick out. Therefore, if the stepped portions of the screw shaft are cut off at both the upper and lower ends of the screw hole at this stage, the threaded portion of the eyeglass frame will be connected and held by the remaining stepped portions of the screw shaft.

〔Example〕

Hereinafter, the present invention will be specifically explained based on embodiments shown in the drawings.

FIG. 1 is a perspective view of a simple screw for eyeglass frames, showing an embodiment of the present invention.

In the figure, 1 is a large-diameter knob with a diameter of about 6φ and a length of about 13 mm, and its surface has jagged grooves 2 to make it easy to turn by hand. 3
is a threaded shaft consisting of multiple stages that extends from the shaft end of the knob part 1 in the axial direction through a neck part 4 with a thickness of 2.5φ and a length of about 2 mm, and has stepped parts A, B, C, and N. ，
Thickness x length in order of e is 1.66φ x 5mm, 1.38φ x 5
mm, 1.18 x 3 mm, 0.98 x 3 mm, and 0.17φ x 3 mm, and the diameter becomes gradually narrower from A to E. Here, the thicker diameter steps A and B of the threaded portion 3 are for the lens attachment and temple connection, and the narrower diameter steps C, D, and E are for the nose pad, and the neck portion 4 and each The connections with the stepped portions A, B, C, D, and E are tapered with a width of approximately 2 mm to 0.5 mm to make screwing easier and to avoid stress concentration, and the tip of the stepped portion E is inserted. It is rounded for ease of use.

The knob portion 1 and the screw shaft 3 having the dimensions and shapes described above are integrally molded from a soft synthetic resin having appropriate strength and flexibility, such as polyacetate, and constitute the simple screw M for eyeglass frames. There is. FIG. 2 is a perspective view showing the state in which the simple screw M for eyeglass frames having the above structure is used.
In the figure, reference numeral 5 denotes an eyeglass frame, which is generally connected at three locations: a nose pad connection A, a lens attachment connection B, and a temple connection C, which are tightened and fixed with screws 6. FIG. 2 shows a state in which the screw 6 of the connection part B for attaching the lens is lost and is repaired using the eyeglass frame screw M shown in FIG. 1. As is clear from the figure, in order to repair the lens attachment connection part B, simply insert the screw shaft 3 of the simple screw M for eyeglass frames into the screw hole 7 of that part, hold the knob part 1, and screw it in firmly. . Then, the step opening of the screw shaft 3, which has a slightly thicker diameter that exactly corresponds to the dimensions of the screw hole 7, enters the screw shaft 3 with a thread groove carved so as to bite into the thread of the screw hole 7 little by little, and then enters the opposite side. It will stick out. Next, the stepped portions of the screw shaft 3 may be cut off at both the upper and lower ends of the screw hole 7. however,
After cutting off, the end face portion may be melted by heat or may be firmly fixed by applying an adhesive. The procedure for repairing the lens attachment connection part A and the temple connection part C is exactly the same as above, but it goes without saying that repairs should be made in order from the one with the smallest diameter of the screw hole 7.

Further, in this embodiment, the threaded shafts 3 in multiple stages extend from both shaft ends of the knob portion 1, but the threaded shafts 3 may extend from only one shaft end. Furthermore, instead of the jagged grooves 2, the outer periphery of the knob portion 1 may be knurled. Furthermore, the detailed dimensions and shapes of the knob portion and the stepped portion are not limited to those in this embodiment, and may be modified as desired.

[Effect of idea]

As explained above in detail, according to the present invention, screw tightening can be easily repaired by turning the knob without a special screwdriver. Furthermore, even if the screws used differ depending on the type of eyeglass frame or the manufacturer, some dimensional errors can be tolerated by selecting the stepped portion of the screw shaft or by tightening the screw firmly. In addition, since the knob portion and the screw shaft serving as a plurality of small screws are integrally molded, handling is easy.
Furthermore, since the knob portion and the screw shaft are integrally molded from soft synthetic resin, they are extremely easy to mold and can be manufactured at low cost, as well as being easy to process such as cutting off. It is possible to provide a simple screw for eyeglass frames that is extremely convenient in practice and can be easily handled by anyone from the elderly to children.

[Brief explanation of drawings]

FIG. 1 is a perspective view of a simple screw for eyeglass frames showing an embodiment of the present invention, and FIG. 2 is a perspective view showing the state in which the screw is used. 1...Knob part, 2...Jagged groove, 3...
...Screw shaft, 4...Neck, 5...Eyeglass frame, 6
...Screw, 7...Screw hole, M...Simple screw for eyeglass frame, A...Connection part for nose pad, B...Connection part for lens attachment, C...Connection part for temple, A,
B, ha, d, ho...Danbe.

Claims (1)

[Scope of utility model registration request] An eyeglass frame characterized by integrally molding a large-diameter knob portion and a multi-step screw shaft extending in the axial direction from the shaft end of the knob portion and having a diameter that is gradually narrower, made of soft synthetic resin. Simple screws for use.