JP3384996B2 - Strain reduction mechanism of resin connection part in eyeglass frame, and method of manufacturing eyeglass frame in which resin connection part does not shrink - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a distortion reduction suppressing mechanism for an eyeglass frame and a resin connecting portion capable of suppressing distortion reduction due to aging of a resin connecting portion of an eyeglass frame including a portion connecting a metal component and a resin component. The present invention relates to a method of manufacturing a spectacle frame that is not distorted.

[0002]

2. Description of the Related Art A spectacle frame is called a metal frame constructed by mainly using a metal material as a component material of each part, celluloid, cellulose acetate resin (also referred to as acetate), cellulose
What is called a plastic frame, which is assembled mainly using plastic materials such as propionate resin (CP) and cellulose butyrate resin (fibrin acetate butyrate plastic), and a combination of metal parts and synthetic resin parts There is one called a "combination frame".

Recently, a combination frame eyeglass made of a combination of a metal part having a delicate texture and a resin part having a warm and soft texture has been gaining popularity. By arranging the metal parts and the resin parts in the proper places, it becomes possible to express the design variability completely different from the case where a single material is used as the basis.

However, in conventional combination eyeglasses manufactured by combining metal parts and resin parts, post-shrinkage (af
A metal part made of titanium or titanium alloy or nickel-titanium alloy material is 200 ℃ in the surface treatment process.
Since it is necessary to perform the above processing that requires heating,
If resin parts are connected, surface treatment cannot be applied because the resin softens and deforms due to the high heat that is recorded.
It is also not possible to adopt integral molding of metal parts and resin by the so-called insert molding method. Therefore,
It is necessary to assemble eyeglass frames by connecting resin parts to titanium-based parts that have been surface treated in advance, but even if resin parts are connected to such metal parts to make eyeglass temples etc. If the joint strength is not obtained, and if there are gaps or steps in the connection between the metal parts and the resin parts, it is unsightly in terms of design. In addition, if the temples that have high frequency of contact with hair have a connection between metal parts and resin parts, the hair will be caught in the gaps and the hair will be scraped off or put on when attaching or removing. There was also the drawback that it became filthy.

[0005]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned drawbacks of the conventional combination eyeglass frame, and it is possible to reduce the strain shrinkage due to the change with time of the resin connection portion. It is a technical object to provide an eyeglass frame which can be suppressed and does not cause a gap or a step between a metal component and a resin component, and a rational manufacturing method thereof.

[0006]

Means adopted by the present inventor to solve the above problems will be described below with reference to the accompanying drawings.

First, the inventor of the present invention made a metal part 1 made of titanium or a titanium alloy or a nickel-titanium-based alloy material and a resin part 2 containing a vaporizing plasticizer such as dioctyl phthalate into a phased state. Join and
The surface 11 of the metal part 1 and the surface 21 of the resin part 2 are formed into a continuous surface without steps, while the metal part 1
Even when the plasticizer is vaporized over time, the anchoring means 13 is used to firmly fix the cutout surface 12 of the resin component 2 and the discontinuity surface 22 of the resin component 2 at least one place. It is characterized in that the resin component 2 is not distorted and contracted, and a continuous surface can be held at the connection portion with the metal component.

In the present invention, the anchor means 13 of the metal component 1 may have the following specific structure. 1. A protrusion is provided from the cutout surface 12 of the metal component 1 and its head
The resin part 2 is formed by bulging 13a to form a sharp harpoon shape.
Firmly cut into the discontinuity surface 22 of. 2. Anchor means in the form of a protrusion formed on the harpoon head 13a
An uneven surface 13b such as a knurling is applied to the peripheral surface of 13 so as to firmly cut into the discontinuity surface 22 of the resin component 2. 3. Notch surface 12 of metal part 1 and notch surface 22 of resin part 2
By interposing an adhesive between the two parts 1 and 2, the two parts 1 and 2 are interleaved to strengthen the joint.

Next, the inventor of the present invention has a cutout surface 12 at a portion to be joined by intermittence, and the cutout surface 12 has anchor means 13 for the cutout surface 12 of the metal part 1 of the spectacles. On the other hand, by overlapping and press-contacting the discontinuing surface 22 of the resin component 2 having the discontinuing surface 22 having a shape conforming to the discontinuing surface 12, the anchoring means 13 is made to bite into the discontinuing surface 22. Both parts 1 and 2 are integrally joined to form the surface of the metal part 1.
By adopting a processing treatment in which 11 and the surface 21 of the resin component 2 are post-processed into a continuous surface without steps and incorporated into the spectacle frame F, it is possible to manufacture a spectacle frame in which the resin connection portion is not distorted. The feature is that the above technical problem is solved in a method.

In the method of the present invention, the notched surface 12 of the metal part 1 and the notched surface 22 of the resin part 2 are pressed against each other while applying ultrasonic vibration, or the metal part 1 is pressed. The adhesive is applied to at least one of the cut-out surface 12 of the resin part 2 and the cut-out surface 22 of the resin part 2,
-Production efficiency is further improved by pressing and joining 2 to promote and strengthen the joining between the metal component 1 and the resin component 2, and the joint strength is also improved.

Further, in the method of the present invention, the resin component 2
As a means for fixing the anchor protrusion 13 by biting into the notched portion 22, the metal part 1 having at least one anchor insertion hole 16 formed through the notched surface 12 is adopted, and the cut surface of the metal part 1 is adopted. 12 and the mating surface of resin part 2
22 is overlapped, and a nail-shaped anchor projection 13 'or a non-heated anchor projection 13' that is heated from the surface 11 side of the metal part is press-fitted from the anchor insertion hole 16 so that both parts 1.2 It is also possible to adopt a method of joining and integrating.

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention will now be described in more detail based on the preferred embodiments shown in the accompanying drawings.

[First Embodiment] In FIGS. 2 and 3, what is designated by reference numeral 1 is a metal component (β titanium) that constitutes the base end side of the temple T, and its surface 11 extends along the rear direction. The cutout surface 12 is formed by cutting away. Then, only one anchor means (projection) 13 is erected and fixed on the base end side of the cutout surface 12, and the head portion 13a thereof is thicker than the shaft portion and sharpened like a harpoon. There is. Reference numeral 14 is
A hinge wing piece for hinge-connecting to the bracket tip B of the spectacle frame F, and reference numeral 15 denotes a resin component 2 described later.
It is a temple core that reinforces.

On the other hand, what is indicated by reference numeral 2 is a resin component made of acetate that constitutes the free end side of the temple T, and in this embodiment, covers the temple core 15. Then, the base end side of the resin component 2 is cut into a fitting shape capable of being attached to the notch surface 12 of the metal component 1 to form a notch surface 22. Reference numeral 23 in the drawing is a core hole into which the above-mentioned temple core 15 is to be inserted.

The metal part 1 and the resin part 2 are joined in a phase-discontinuous state in which the cutout surface 12 and the discontinuity surface 22 are overlapped with each other, and the surface 11 of the metal part 1 and the surface of the resin part 2 are joined together. 21 and 21 form a continuous surface without steps.

In the present embodiment, the cutout surface 12 of the metal component 1 and the cutout surface 22 of the resin component 2 are firmly bonded by an epoxy resin adhesive, and the cutout in the metal component 1 Anchor protrusion 13 protruding from the base end of the surface 12
The harpoon-shaped head 13a of the above is pierced firmly with the inside of the resin part 2 being bitten (FIG. 4). Therefore, even if the eyeglass frame manufactured by incorporating the temple T of the present embodiment is used for a long period of time and the plasticizing agent (dioctyl phthalate) or the like in the resin part 2 vaporizes and contracts, Since the connection between the anchor means 13 and the resin component 2 is extremely strong, the distortion of the resin is restrained at the relevant portion, and the gap or step at the joint between the metal component 1 and the resin component 2 is so invisible to the naked eye. Maintain a continuous surface of.

[Second Embodiment] The product of the present embodiment is different from the product of the first embodiment in the following points, and the rest is the same as the product of the first embodiment. 1. The metal part 1 is made of pure titanium. 2. As shown in FIG. 5, one anchor means (projection) 13 is provided at each of the base end side and the free end side slightly away from the base end side. 3. The anchor means 13 has a harpoon-shaped head 13a, and
Fanged irregularities 13b are formed on the entire peripheral surface (see FIG. 7). 4. The resin forming the resin component 2 is CAB (fiber acetyl butyrate resin).

In this embodiment, the harpoon-shaped head portion 13a of the anchor projection 13 and the fan-shaped concavo-convex portion 13b on the peripheral surface are formed in the resin component 2.
Since it is in a state of biting into the CAB that composes, even if the plasticizer (diheptyl phthalate) in the resin vaporizes and contracts during a long period of time, the anchor protrusion 13 Since the connection between the resin component 2 and the resin component 2 is extremely strong, the distortion of the resin is restrained in that portion, and no gap or step is formed at the joint between the metal component 1 and the resin component 2.
A continuous surface can be maintained.

Next, a method of manufacturing the second embodiment product shown in FIGS. 5 and 6 will be described.

First, an epoxy resin adhesive is applied to the entire cut surface 12 of the metal component 1. Next, while inserting the temple core 15 of the metal component 1 into the temple core hole 23 of the resin component 2, the cutout surface 12 of the metal component 1 and the cutout surface 22 of the resin component 2 are overlapped with each other to form the metal component. Apply ultrasonic vibration to 1.

If ultrasonic vibration is applied to the metal part 1, the CAB resin molecules are ultrasonically generated on the cut surface 12 of the metal part 1 and the cut surface 22 of the resin part 2 which is in contact with the anchor projection 13. It vibrates and becomes plastic. At this time, ultrasonic vibration is locally concentrated on the abutment surface 22 that is in contact with the anchor means 13, so that heat is generated at a higher temperature (180 ° C.) than other parts, and the resin around the anchor means 13 melts. It becomes a state. Then, in this state, when the cutout surface 12 of the metal component 1 and the cutout surface 22 of the resin component 2 are brought into pressure contact with each other, the applied epoxy resin adhesive is cured and dried, and the cutout surface 13 and the cutout surface
22 is firmly adhered, and the anchor means 13 is embedded in the resin of the discontinuity surface 22. If the ultrasonic vibration is stopped in this state, the resin is hardened and the anchor means 13 is fixed in the resin part 2 so as to bite into it, and the temple is completed.

The temple T thus completed is shown in FIG.
The target spectacle frame F is completed by assembling in the form as shown in FIG.

The embodiments specifically shown in the specification and drawings of the present application are as described above, but the present invention is by no means limited to the above-mentioned embodiments, and various modifications are made within the scope of the claims. Can be changed.

For example, the resin component 2 in the present invention may be manufactured by cutting with a machine tool such as a machining center (not shown), or may be mass-produced by injection molding. In any case, it naturally belongs to the technical scope of the present invention.

In the above-described embodiment, ultrasonic vibration is applied when the metal part 1 made of titanium or a titanium alloy or a nickel-titanium alloy material and the resin part 2 are pressed against each other. Alternatively, it is possible to plasticize the resin by heating with a heater, and the anchor means 13 may bite and fix the notch surface 22 of the resin component 2 only by strong pressure without heating. In the case, of course, it belongs to the technical scope of the present invention.

Further, in the above-described embodiment, the anchor means 13 is of a type protruding from the cutout surface 12 of the metal component 1, but at least one anchor is provided on the cutout surface 12 of the metal component 1. The insertion hole 16 is formed so as to penetrate, and the notch surface 12 of the metal component 1 and the notch surface 22 of the resin component 2 are overlapped with each other, and the nail-shaped anchor projection heated from the surface 11 side of the metal component. It is also possible to press-fit 13 'or the anchor projection 13' in the non-heated state from the insertion hole 16 so that both parts 1 and 2 can be joined and integrated. Such a modified embodiment is also a technique of the present invention. It goes without saying that it belongs to the target range.

[0027]

As described above with reference to the embodiments, in the distortion reduction suppressing mechanism of the resin connecting portion of the spectacle frame constituted by applying the present invention, titanium or a titanium alloy or a nickel-titanium alloy is used. A metal part and a resin part made of a material are joined in a discontinuous state to form the surface of the metal part and the surface of the resin part on a continuous surface without steps, and on the discontinuity surface of the resin part. On the other hand, since both parts are joined and integrated while the anchor means protruding from the cutout surface of the metal part is bited, the plasticizing agent in the resin shrinks due to vaporization during a long period of time. Even when the action is applied, since the coupling between the anchor means and the resin component is significantly stronger than the contracting force, the strain and contraction of the resin in the relevant portion can be restrained, and the metal component and the resin component can be suppressed. With Without causing gaps or steps in the eyes part can be maintained long continuous surface.

Further, the spectacle frame having the above-described distortion reduction mechanism of the resin connection portion is simply processed by superposing the metal component cutout surface and the resin component cutout surface and press-contacting each other. Since the anchoring means of the metal part can be made to bite into the discontinuity surface of the resin part, it is possible to efficiently manufacture the spectacle frame at a very low cost.

As described above, the present invention has succeeded in solving the strain-contracting deformation in the resin connection portion of the spectacle frame by a simple and straightforward means, and its industrial utility value is extremely large. You should say.

[Brief description of drawings]

FIG. 1 is a perspective view of a spectacle frame in which a resin connection portion formed by applying the present invention does not distort.

FIG. 2 is a partially enlarged exploded perspective view of the temple according to the first embodiment of the present invention.

FIG. 3 is a partial perspective view showing an enlarged resin connecting portion in the first embodiment (temple portion) of the present invention.

FIG. 4 is a partially enlarged explanatory view showing a resin connecting portion of the first embodiment (temple portion) of the present invention in a cutaway manner.

FIG. 5 is a partially enlarged exploded perspective view of a temple according to a second embodiment of the present invention.

FIG. 6 is a partial perspective view showing an enlarged resin connecting portion in the second embodiment (temple portion) of the present invention.

FIG. 7 is an explanatory perspective view showing enlarged features of anchor protrusions of a metal component according to a second embodiment of the present invention.

FIG. 8 is an enlarged perspective explanatory view showing another modified embodiment of the present invention.

[Explanation of symbols] 1 metal parts 11 Surface (of metal parts) 12 Missing surface 13 Anchor means 13 'nail-shaped anchor means 13a Head (of anchor means) 13b Concavo-convex processing (on the peripheral surface of anchor means) 14 hinge wings 15 temple core 2 resin parts 21 Surface (of resin parts) 22 Missing surface 23 core hole B Bracket Satoshi F glasses frame T temple

─────────────────────────────────────────────────── ─── Continuation of the front page (56) Reference JP-A-4-180011 (JP, A) JP-A-11-271693 (JP, A) JP-A-11-326841 (JP, A) Actual Kaihei 6- 60825 (JP, U) Actual Development 7-19729 (JP, U) Actual Development 7-29521 (JP, U) Registered Utility Model 3022504 (JP, U) (58) Fields investigated (Int.Cl. ⁷ , DB name) G02C 5/14 G02C 11/02 B29D 12/02

Claims (8)

(57) [Claims] 1. A metal component 1 made of titanium, a titanium alloy, or a nickel-titanium alloy material.
And a resin part 2 containing a vaporizing plasticizer such as dioctyl phthalate are joined together in an offset state to form the metal part 1
The surface 11 of the resin component 2 and the surface 21 of the resin component 2 are formed into a continuous surface without steps, while the cutout face 12 of the metal component 1 and the discontinuity face 22 of the resin component 2 are provided at least at one place, and the anchor means 13 is provided. The spectacle frame characterized in that the resin component 2 does not distort when the plasticizer vaporizes over time, and a continuous surface can be held at the connection portion with the metal component. Strain reduction suppression mechanism in the resin connection part. 2. Anchor means 13 is a cutaway surface of the metal component 1.
2. The protrusion protruding from 12, the head 13a of which is swollen and sharpened like a harpoon,
Distortion suppression mechanism of resin connection part in eyeglass frame. 3. The distortion reducing mechanism for a resin connecting portion of an eyeglass frame according to claim 1 or 2, wherein the anchor means 13 is provided with a concavo-convex processing 13b such as knurling on its peripheral surface. 4. An adhesive agent is interposed between the cutout surface 12 of the metal part 1 and the cutout surface 22 of the resin part 2 so that both parts 1
The distortion reduction suppressing mechanism of the resin connection part in the spectacle frame according to any one of claims 1 to 3, wherein 2 is joined in a phase-disconnected state. 5. The cutout surface 12 of the metal part 1 of the spectacles having a cutout surface 12 at a portion to be joined by intermittence and having an anchor means 13 on the cutout surface 12. Face 12
The disposing surface 22 of the resin component 2 having the discontinuing surface 22 having a shape conforming to the above is superposed and press-contacted with each other, so that the anchor means 13 is bitten into the discontinuing surface 22 and the both parts 1 and 2 are connected.
An eyeglass frame in which the resin connection portion is not distorted, characterized in that the surface 11 of the metal component 1 and the surface 21 of the resin component 2 are integrated into the eyeglass frame F by post-processing a continuous surface without steps. Manufacturing method. 6. The resin connecting portion according to claim 5, wherein the cutout surface 12 of the metal part 1 and the cutout surface 22 of the resin part 2 are pressed against each other in a state where ultrasonic vibration is applied. A method for manufacturing a spectacle frame that does not distort. 7. The adhesive is applied to at least one of the cutout surface 12 of the metal component 1 and the cutout surface 22 of the resin component 2, and then the two components 1 and 2 are pressed against each other. The method for manufacturing an eyeglass frame according to claim 5 or 6, wherein the resin connection portion is not distorted. 8. The cutout surface 12 of the metal part 1 is formed with at least one anchor insertion hole 16 therethrough, and the cutout surface 12 of the metal part 1 and the cutout surface 22 of the resin part 2 are overlapped with each other. Then, the heated nail-shaped anchor means 13 'or the non-heated anchor means 13' from the surface 11 side of the metal part is press-fitted from the insertion hole 16 to integrally join the parts 1 and 2 together. The method for manufacturing an eyeglass frame according to any one of claims 5 to 7, wherein the resin connection portion is not distorted.