JPH06186507A - Hinge of spectacles - Google Patents

Abstract

PURPOSE:To provide the hinge which solves the problems of slidability, miniaturization and durability which the washer for the hinge of the spectacles and has a good assembling characteristic. CONSTITUTION:A resin incorporating a lubricant and having an electrical conductivity is coated on the turning surface of the barrel of the hinge 5 of the spectacles. The washer is not used. The coating of the resin is applied on both surfaces of the turning surface of one piece of the barrel attached to the male barrel 1 and thereafter, assembling and brazing are executed. The resin is prepd. by incorporating molybdenum disulfide, PTFE, graphite, etc., as the lubricant into a binder resin, such as polyamide imide, polyimide or epoxy and incorporating conductive powder of Ni, Al, etc., as a conducting agent therein. Ti, Au, Ni alloy, etc., having the high primary adhesion to the base material of the hinge are selected for the binder resin. The film thickness of the resin is confined within 10 microns and within the intermeshing tolerance of the hinge.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to eyeglass hinges and washers used for hinges.

[0002]

2. Description of the Related Art Conventionally, eyeglass hinges have been required to have exceptionally high durability as a small hinge. Also, since it is directly opened and closed by a person, it is desirable that a smooth opening and closing operation can be maintained for a long period of time, and it is made with much higher precision than hinges that are commonly used in fields other than eyeglasses. There is.

There are various methods for maintaining the smooth opening / closing operation of the hinge for a long period of time, and one method is to select an appropriate washer. Compared to the material that makes up the hinge, a washer made of a soft material is used to provide the opening and closing movement of the hinge with a sliding property.

In this case, the washer is effective in achieving a smooth movement, but it has a problem in durability, and there is a case where rattling gradually occurs during use due to wear. . In particular, titanium and titanium alloys, which have been widely used recently as eyeglass frame materials, are hard in material and have a rough surface microstructure, so that washers, screws and the like are rapidly worn by opening and closing operations.

For this reason, a washer of the same material type as that of the frame material may be used, but there is a problem such as welding, which may rather significantly deteriorate the achipping property. Further, if the materials of the metal washer and hinge are different, electrochemical corrosion may occur due to the adhesion of moisture such as sweat and the contact of dissimilar metals. In order to prevent such a state, a method of applying a resin coating to the washer can be considered.

Although the above-mentioned welding and corrosion can be avoided by the method of applying the resin coating, a new problem occurs. If a resin-coated washer is used with an eyeglass hinge, there arises a problem that the resin coating layer of the washer exerts a bad influence during wet plating and electrodeposition coating on the eyeglass frame.

Usually, when performing wet plating and electrodeposition coating on a spectacle frame, an energizing jig is set on the box legs of the spectacles, and current flows to the box legs, hinges and temples. At this time,
If a washer and a screw with resin coating are used for the hinge, the hinge will be attached due to the non-conductivity of the resin coating layer.
Some or all of the current flowing to the temple is blocked,
It is possible that the temples cannot be sufficiently wet-plated and electrodeposition coated. Further, temporary adhesion between the base material and the processed film may be lost, and processing defects such as peeling of the processed film may occur.

Therefore, it is excellent in conductivity, has no adverse effect on wet plating and electrodeposition coating, and can prevent corrosion and welding.
To deal with this problem, a washer is coated with a resin in which a solid lubricant and conductive powder are mixed in a binder resin. As described above, the conventional hinge has the lubricant to provide the sliding property to prevent the abrasion and the conductive powder to maintain the conductivity.

[0009]

As described above, in order to give the washer conductivity and corrosion resistance, the solid lubricant and the binder resin mixed with the conductive powder are coated. The hinges of the eyeglasses are required to have high precision and durability even though they are small parts, and the resin coating needs to conform to the shape of the washer, and it is necessary to adhere them evenly with a thin film. Therefore, there is a minimum size of the washer in terms of the resin coating technique.

Smaller washers can be used as long as they are not resin-coated as before, but with such methods as wet plating and electrodeposition coating.
The surface processing method that can be used regardless of the material cannot be used. Recently, titanium and the like, which have been widely used, require a resin coating on the washer in terms of plating and rotation.

Also in terms of the degree of freedom in designing the spectacle frame, it is necessary to thin the hinge piece and the washer to correspond to the width of the temple for the thin temple, but in order to maintain mechanical strength, the temple and The temple must also be compensated for a certain thickness or more. If the mechanical strength is insufficient, the washer may be damaged or the hinge may be broken. For this reason,
There is a limit to the miniaturization of washers, etc., and the size of the washer to be treated with resin is 2.5 x 0.55 x 0.1 m.
m, hinge width is 3mm minimum and thinnest.

It is an object of the present invention to solve the above-mentioned problems of slipperyness, downsizing and durability of the washer for hinge of eyeglasses.

[0013]

In order to solve the above problems, the hinge of the spectacles of the present invention has a rotating surface containing a lubricant and coated with a conductive resin without using a washer. . The resin coating may be applied to both sides of the rotation surface of the single piece attached to the male piece, and then the assembly and the brazing may be performed. Hereinafter, the hinge of the present invention will be described with reference to the drawings.

[0014] Molybdenum disulfide, PTF and binder resin such as polyamide-imide, polyimide, epoxy, etc.
A resin containing a solid lubricant such as E or graphite and mixed with a conductive powder such as Ni or Al is used for coating in order to impart conductivity. As the binder resin, one having high primary adhesion with the hinge base material such as Ti, Au, or Ni alloy is selected. Coating thickness is 10
Within micron, within the hinge meshing tolerance.

FIG. 1 is a perspective view showing an example of a hinge of the present invention. Reference numerals in the drawing are 1-male piece, 2-female piece and 3-rotating surface. The hinge width is 3 mm, and the thickness of both male piece 1 and female piece 2 is 1
It is about mm. When using washers, two washers each having a thickness of 0.1 mm were usually used. In the present invention, the rotation surface 3 of the male piece 1 is directly coated with resin,
Since no washer is interposed, the mechanical strength of the piece can be improved by increasing the piece thickness by 0.2 mm. Also, since there is no washer, the strength is not impaired even if the hinge width is made thin.

After that, the female piece and the male piece are assembled, and the process of brazing the temple and hinge is performed.
The brazing method is selected. Resistance brazing method, high-frequency heating brazing method, spot welding, and other brazing methods that are optimal for the hinge base metal. FIG. 2 shows an explanatory view of brazing. Reference numerals in the figure are 4-temple, 5-claw, and 6-brazing surface.

When brazing, the male and female pieces of the hinge are
Because the resin coating keeps the conductivity,
The problem of sparks between the electrodes and defective brazing does not occur.
However, in the case of resistance brazing method or high frequency brazing method,
Considering the temperature rise during brazing, the resin coating is
It must also have heat resistance.

Honing is applied to both sides of the rotation of one piece of the male piece, or if several concentric circular grooves of about 10 microns are processed and resin coating is performed, primary adhesion between the rotation surface and the resin layer is improved. It can be done.

In the case of Au hinge, white turbid resin is used,
Giving good lubricity to the initial familiarity.

[0020]

As described above, since the hinge of the present invention directly applies the resin containing the lubricant to the rotating surface without using the washer, it has excellent conductivity and is not surface-treated. Suitable for Since there are no washers, the manufacturing process is simplified,
The cost can be suppressed. The hinge of the present invention can be made smaller than the conventional hinge, and the mechanical strength can be sufficiently maintained even if the hinge is made smaller. Since the washer is not used, the assembling property of the hinge is improved, and the mechanical strength required for the eyeglass hinge is improved.

[Brief description of drawings]

FIG. 1 is a perspective view showing an example of a hinge of the present invention.

FIG. 2 is an explanatory diagram of brazing.

[Explanation of symbols]

 1 Male piece 2 Female piece 3 Rotating surface 4 Temple 5 hinge 6 Brazing surface

Claims (2)

[Claims] 1. A hinge of spectacles comprising a pair of male and female pieces having a piece portion on a horseshoe portion, wherein the rotation surface of the piece coated with a resin containing a lubricant and a conductive agent is fitted together. The hinge of the eyeglasses. 2. The resin is molybdenum disulfide, PTF
E, one or more lubricants selected from graphite,
The eyeglass hinge according to claim 1, which is a resin selected from polyamide imide, polyimide, and epoxy resin containing a conductive agent.