JPS625632B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for manufacturing pressure-resistant waterproof anti-fog underwater goggles comprising plastic underwater goggles frames and anti-fog plastic flat lenses.

Conventional pressure-resistant and waterproof underwater goggles are manufactured by integrating lenses and frames by plastic injection molding. Since the lenses of these glasses fog up during use, various methods have been used to prevent fogging, but none of them have been satisfactory. Recently, a method has been developed for coating the surface of a tough transparent plastic board with an anti-fog film. That is, when an epoxy resin solution is sprayed onto the surface of a transparent plate made of cellulose propionate resin and cured, an antifogging film that does not peel off is formed. This anti-fogging film does not melt even at temperatures of 200°C, so plastic lenses coated with this anti-fog cannot be adhered to plastic frames using normal methods.

The present invention succeeded in achieving this adhesion by applying ultrasonic waves. That is, the sides of a plastic lens coated with an anti-fog film will melt at a temperature of 150°C to 200°C since no anti-fog film is applied. Therefore, the side surface of the lens and the inner wall surface of the eyeglass frame can be simultaneously melted and bonded using ultrasonic waves. At this time, if the melted portion of the inner wall of the frame is pressed down with a knurled horn of an ultrasonic generator, it covers the edges of the lenses from above and imparts pressure resistance to the glasses.

The manufacturing method of the present invention will be explained in detail with reference to the drawings. As shown in FIG. 1, the eyeglass frame 1 is a plastic molded product having an upper inner edge 4, a middle inner edge 5, and a receiving inner edge 6. As shown in FIG. The wall has a slope. The lens 2 is made by punching a cellulose propionate resin having an anti-fogging film into an appropriate shape such as a circle or an oval. Since the cut side surface of the lens 2 is not coated with a protective film, it is melted at 150°C to 200°C by ultrasonic waves. As shown in FIG. 6, the lens 2 is brought into close contact with the inner edge 5 of the frame 1 with its side surface, and as shown in FIG. When the knurled tip 7 is placed across the inner edge 5 of the frame and the periphery of the lens 2 while applying appropriate pressure and ultrasonic waves are applied for 0.4 seconds, the inner wall of the frame and the side surface of the lens 2 are instantly melted. As shown in the figure, the lens 2 is pushed down to the bottom of the receiving inner edge 6, and at the same time, the bottom surface of the upper inner edge 4 is melted and knurled, so that the edge of the lens 2 is knurled from above.
Glue it by pinching it in place.

The underwater glasses of the present invention are waterproof because the edges of the frame 1 and the edges of the lenses are melted and fixed, and the edges of the lenses are glued together with the upper and lower surfaces sandwiched by the edges of the frame. It is also pressure resistant.

As one of the embodiments of the present invention, the outer diameter is 46 mm on the long axis.
It is an oval shape with a short axis of 32 mm, the wall thickness of the frame is 5 mm, and the length of the frame is
10mm cellulose propionate resin eyeglass frame
Glasses made using the above manufacturing method using cellulose propionate resin lenses with a 1.5 mm thick anti-fog film were immersed in hot water at 80°C for 2 hours and then pulled out to perform an underwater pressure test of 2 atm. It was proved that the ivy did not leak water or was destroyed and was sufficiently pressure resistant and waterproof. As described above, it can be said that the manufacturing method of the present invention is novel and useful.

[Brief explanation of the drawing]

FIG. 1 is a plan view of the eyeglass frame of the present invention, FIG. 2 is a plan view of the lens of the present invention, FIG. 3 is a side view of the lens, FIG. 4 is a schematic cutaway side view of the horn of the ultrasonic generator, and FIG. Figure 5 is a bottom view of the horn shown in Figure 4, Figure 6 is a cutaway side view of the lens inserted into the eyeglass frame, and Figure 7 is a side view of the eyeglass frame shown in Figure 6 placed on a pedestal and inserted into the frame from above using the tip of the horn. FIG. 8 is a cut side view of the completed eyeglasses of the present invention in which the inner edge and the peripheral edge of the lens are pressed together and no ultrasonic waves are applied. 1... Eyeglass frame, 2... Lens, 3... Horn of the ultrasonic generator, 4... Upper inner edge of the frame, 5... Middle inner edge of the frame, 6... Receiving inner edge of the frame, 7... Horn Knurled tip, 8... pedestal, 9... knurled edge.

Claims (1)

[Claims] 1. The inner wall of a plastic eyeglass frame consists of an upper inner edge, a middle inner edge, and a receiving inner edge. The upper inner edge and middle inner edge are stepped, and the inner wall of the receiving edge is sloped. A flat lens is made by punching a transparent plastic plate with anti-fog treatment. , Place the lens tightly fitted into the inner edge of the eyeglass frame on the pedestal of the ultrasonic generator, and from above place the knurled end of the horn of the ultrasonic generator over the inner edge of the frame and the periphery of the lens. Apply appropriate pressure to place the lens, apply ultrasonic waves for 0.3 to 0.5 seconds to instantly melt the inner wall of the frame and the side of the lens, press the lens to the bottom of the inner edge of the receiver, and press the lens to the bottom of the inner edge of the lens and the wall of the inner edge. A method for producing pressure-resistant, waterproof, and anti-fog underwater goggles by melting and knurling the stepped surface of the upper inner edge at the same time to cover the edges of the lenses from above so as to sandwich them, and bonding them with the inner wall of the frame.