JPH0114010Y2 - - Google Patents

Description

[Detailed explanation of the idea] (Technical field of invention) The present invention relates to a sweat stopper member for eyeglass frames.

(Background of the invention) Due to the increase in the number of people playing sports, eyeglass frames with a sweat stopper attached to the upper center of the eyeglass frame toward the forehead have recently become commercially available for use in sports and sunglasses.

The sweat stopper consists of a plastic sweat stopper that actually contacts the forehead and prevents sweat from falling from the forehead into the nose and eyes, and a metal core for attaching this to a metal front frame. Conventional sweatbands are manufactured by insert molding a plastic sweatband into a metal core, and then are attached by brazing the legs of the metal core to the front frame. Either of the methods for attaching the sweat stopper is to drill a through hole in the front frame, cut the metal core brazed to the front frame in the middle, and insert the core into the hole in the plastic sweat stopper from the cut point. It was installed by

However, in the former method, the core and the plastic sweat stopper are integrated, and when the entire frame is plated in the final process of manufacturing eyeglass frames, the plastic sweat stopper is removed during the cleaning process, which is the pre-plating process. The plating process has the disadvantage of causing surface roughness and premature aging, and since the distance between the plastic sweat stopper and the brazed part is close, the plastic sweat stopper may be damaged by the heat during brazing. There was a drawback that it required a high level of skill to braze the sweatband to the front frame. Furthermore, after completing the eyeglass frame or after long-term wear, if for some reason it was desired to replace just the plastic sweat stopper, this could only be done after the brazing of the core had been removed.

On the other hand, in the latter method, since the core is cut inside the plastic sweat stopper, it is difficult to match the curvature of the plastic sweat stopper to the curve of the wearer's forehead.

As mentioned above, regarding conventional sweatproof members,
There were various drawbacks.

(Purpose of the invention) Therefore, the purpose of the invention is to easily adjust the curvature of the sweat stopper, to allow the sweat stopper to be attached and removed after the eyeglass frame is completed, and to provide greater safety against external impacts. To provide a sweat-stopping member for an eyeglass frame that provides sweat-stopping properties.

(Summary of the invention) To achieve this objective, the present invention has a mating part whose cross-sectional shape is non-free rotationally symmetrical in the main part, that is, a shape other than a circle, preferably a rectangle elongated in the vertical direction, and the lower surface thereof. To provide a flexible plastic sweat stopper member having a slit-like slit in the longitudinal direction, thereby making it possible to forcibly attach and detach it from a metal core.

Hereinafter, the present invention will be described in more detail with reference to the drawings showing one embodiment.

(Example) Fig. 1 is a plan view from above of the front frame 3 of the eyeglass frame to which the metal core 1 of the sweat stopper is brazed.The imaginary line 2 represents the sweat stop member, and the solid lines 4 and 4' represent the temples. show.

The metal core 1 is made of, for example, high nickel alloy, nickel silver, Monel, or SUS (stainless steel), and has legs 1a and 1b with a diameter of 1 to 1.4 mm, for example, at both ends.
The end thereof is brazed to the metal front frame 3.

Since the legs 1a and 1b have bending adjustment parts having the shape shown in FIG. 1, the wearer can individually adjust the sweat stopper member 2 by tightening or stretching the bending using a simple tool such as pliers or a knife. It can be adjusted according to the distance between the front frame and the forehead of the individual (dimension A in Figure 1).

The main part of the metal core 1, that is, the part into which the flexible plastic sweatproof member 2 is fitted, has a curve slightly curved toward the forehead, and its cross-sectional shape is a vertically long rectangle. This cross-sectional shape has non-free rotational symmetry, thereby preventing the sweat stopper member 2 from rotating around the metal core 1 as the central axis.

On the other hand, in the flexible plastic sweatproof member 2 of the present invention, as shown in FIG. , and there is a slit-like slot 2a in the longitudinal direction on the lower surface, the depth of this slot 2a reaches to the fitting part 2b, and the width is equal to the length of the vertical rectangle in cross section of the main part of the metal core 1. It is narrower than the short sides, thereby preventing the sweat stopper member 2 from easily separating from the metal core 1.

The flexible plastic sweat stopper member 2 can be easily attached to the metal core 1 by utilizing the elasticity of the flexible plastic material and aligning the slot 2a with the core 1 and pushing it in from above. .

Therefore, the sweat stopper member 2 can be attached after the eyeglass frame is completed.

FIG. 3 is a rear view mainly of the front frame of the eyeglass frame in which the sweat stopper member 2 of this example is fitted, and FIG. 4 is a sectional view taken along the line BB in FIG. 3. The C direction is the forehead direction.

Since the sweat stopper 2 of the present invention can be forcibly attached and removed through the slot 2a, the wearer can remove the already installed sweat stopper 2 by pulling it upward when purchasing or after purchasing the eyeglass frame, and then create a different color. Replace it with a sweatproof member 2 with a pattern or various shapes,
This allows it to be matched to the wearer's skin color and to the purpose of use. In addition, sweatproof member 2
If a problem occurs after long-term use, it can be replaced with a new one. The sliding movement of the sweat stopper member 2 in the longitudinal direction relative to the core 1 is determined by the position where the core 1 moves from the rectangular cross section of the main part to the circular cross section of the remaining part and the corresponding change in the cross-sectional shape of the fitting part 2b of the sweat stopper member 2. This can be prevented by matching the positions. This sweat stopper member 2 can be forcibly attached to and removed from the core 1, but it will not come off when worn. When the shape of the plastic sweat stopper 2 is obtained at once by molding, the relationship between the fitting portion 2b and the slit-like slot 2a is undercut (for this reason, when worn, the plastic sweat stopper However, by using a flexible plastic material as the sweat prevention member 2, there is no problem with molding (particularly with mold release).

Furthermore, if a rubber-like material is used, that is, rubber or thermoplastic elastomer with a rubber hardness (JIS: A) of 100 degrees or less, preferably 40 to 100 degrees, such as a urethane-based or polyester-based elastomer, the feeling of contact with the forehead can be reduced. In addition, even if an external impact is applied to the front frame, the front frame will be safer than when using hard plastic. In order to further improve safety, it is preferable to increase the thickness of the plastic sweat stopper member 2 from the forehead side to the core 1 (dimension D in FIG. 4).

Furthermore, by using a rubber-like material, the curve (R in FIG. 1) of the sweat stopper member 2 can be easily adjusted.

In addition, from the viewpoint of manufacturing method, it is preferable for the sweat stopper member 2 to be made of a thermoplastic elastomer that can be molded by injection molding.

(Effects of the Invention) As described above, according to the present invention, the sweat stopper member can be easily attached after the eyeglass frame is completed, and can also be easily replaced after being attached.

[Brief explanation of the drawing]

FIG. 1 is a top plan view of the front frame of an eyeglass frame to which a sweatproof metal core is attached, and FIG. 2 is a central portion of a sweatproof member 2 and metal core 1 according to an embodiment of the present invention. FIG. 3 is a rear view mainly of the front frame of the eyeglass frame in which the sweat stopper member 2 is fitted, and FIG. 4 is a cross-sectional view taken along the line B--B in FIG. 3. Explanation of symbols of main parts, 1...metal core, 1a,
1b...Metal core leg, 2...Sweatproof member, 2a...
...Sweatproof member slot, 3...Front frame, 4, 4'
...Temple.

Claims (1)

[Claims for Utility Model Registration] 1. A fitting part made of flexible plastic and having a non-free rotationally symmetrical cross-sectional shape in its main part, and a slit-like slit in the longitudinal direction of the lower surface following the fitting part, A sweat stopper member for an eyeglass frame, characterized in that it can be forcibly attached to and detached from a metal core. 2. The sweat-stopping member according to claim 1, wherein the sweat-stopping member is made of rubber or thermoplastic elastomer with a rubber hardness (JIS: A) of 100 degrees or less. 3. The sweat stopper member according to claim 1, wherein the thickness from the fitting part to the forehead side is thicker than the thickness from the fitting part to the front side.