JPH036482B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a method for manufacturing a lens frame using a vision correction or eye-preservation lens and another plastic lens.

Conventional technology and its problems Conventionally, lens frames made of synthetic resin are formed by bending a flat bar with a desired cross-sectional shape into a loop shape to match the desired frame shape, and by forming a frame into the desired shape from a flat plate of frame material. There is a method of cutting out a shape and then heating and deforming it so that a lens can be fitted thereto, and a method of molding it from the beginning using a mold so that a lens can be fitted thereto.
In the method of bending and forming this flat bar material and the method of cutting it out from a flat plate, after cutting or bending the material into the desired shape, the material is heated to the extent that it can be plastically deformed, and the lens is shaped so that the lens is fitted and held. The curve is formed in almost the same way as the degree of curvature. Therefore, when frames manufactured in this way are used as eyeglasses, if the frames are heated by direct sunlight or ambient temperature, the frame shape will return to its original state and the curvature of the lens frame will change. This causes disadvantages such as the lens falling off in extreme cases, or the lens holding being loosened and easily coming off.

In addition, since eyeglass frames are made of different materials and lenses for correction and eye protection, when wearing glasses, the border between the lenses and the frames feels uncomfortable, and the lens frames are inevitably thicker than the lenses, which makes the appearance less appealing. There are limits to damage and even design.

In the present invention, the frame body into which the lens fits is constructed using a synthetic resin lens, so that it has almost the same curvature as an eyeglass lens and eliminates the sense of discomfort.
The purpose is to improve the transparency of the frame.

Solution to the problem A synthetic resin lens is cut into the desired shape of the lens frame, and a lens fitting hole is cut inside the lens according to the shape of the lens to form the desired lens frame. A concave groove (or V
A groove) is formed, and another lens for vision correction or eye preservation is cut to match the shape of the lens fitting hole, and this lens is fitted into the frame, so that the eyeglass frame and lens are approximately connected. have the same curvature.

Embodiments The present invention will be described below with reference to embodiments shown in the drawings, but the shape of the lens frame can also be applied to shapes other than this embodiment.

First, a synthetic resin lens 1 (hereinafter referred to as a plastic lens) suitable for use as a lens frame is prepared. This can be done by appropriately selecting commercially available prescription plastic lenses, colored plastic lenses, flat plastic lenses, etc. depending on the mirror wearer's preferences. This plastic lens 1 is then perforated. This is a lens fitting hole 3 that has the desired external shape of the eyeglass lens 2, and a concave groove (△ bevel) 4 for fitting and fixing the lens over the entire length of the inner peripheral surface of this hole 3. Process. Next, the lens frame 5 is cut along the outer line 6 to obtain a lens frame 5 having a desired shape. In this case, the outline line 6 may be determined to have an appropriate width according to the outer peripheral shape of the lens fitting hole as shown in the figure, but it may be set to a desired shape different from that of the lens fitting hole. can. For example, even if the lens fitting hole has a circular shape, the outer shape can be oval, triangular, etc. The lens frame 5 which fits and holds the lens cut from the plastic lens 1 in this manner has the same curvature as the lens, or approximately the same curvature in the case of a prescription lens. Two of these lens frames 5 are used to construct eyeglasses; in this case, as shown in FIG. 3, they are fixed to a metal or other frame 7 having a nosepiece and temples. For example, in order to fix the lens fitting hole 5 to the metal hanging frame 7, a groove 8 is formed over the entire outer circumference of the lens frame 5, and an eye wire or the like of the frame 7 is fitted into the groove 8. hug each other.

The lens 2 that fits into the lens frame 5 may be a prescription lens, a colored lens, a flat white lens, etc., depending on the wearer's eye protection, vision correction, or preference. 2, a glass lens can be used in addition to a plastic lens. In addition, the embodiment shown in FIG.
The temple 9 and nose piece 10 are directly attached to the base. First, a plastic lens 1 is cut into a rectangular shape as shown in the figure, or any other desired shape along its outer contour line 6 in accordance with the outer shape of the lens frame 5. Next, a lens fitting hole 3 is bored in this lens frame 5. Also in this case, the shape of the lens fitting hole 3 can be made arbitrary. A concave groove 4 (or V-groove) is formed on the inner peripheral surface of this hole 3 so that the lens 2 can be held therein. A desired lens 2 is fitted and fixed to this lens frame 5.
Next, the two lens frames 5, 5 are connected in parallel via the nose piece 10 or a rod (not shown), and the glasses 9, 9 are attached to form the desired eyeglasses.

Effects of the Invention According to the present invention, since the lens frame is formed by cutting using a plastic lens,
It is possible to prevent deformation due to heat after processing, resulting in a highly accurate frame, which allows the lens to be held and fixed securely. The transparency of this lens frame has also been improved, the border between the lens and the frame is smoother, the field of view is wider, and the curvature of the lens and frame almost match, giving it a beautiful appearance and creating the design you desire. It has advantages such as being able to

[Brief explanation of drawings]

Fig. 1 is an explanatory diagram showing the process of manufacturing a frame from a plastic lens, Fig. 2 is an explanatory diagram of a different embodiment, Fig. 3 is an external view of the embodiment, and Fig. 4 is a sectional view of the lens part. It is. 1 is a plastic lens, 2 is a lens, 3 is a lens fitting hole, 4 is a groove, 5 is a lens frame, 6
is the outline, 7 is the frame, 8 is the groove, 9 is the vine,
10 is the nosepiece.

Claims (1)

[Scope of Claims] 1. Using a desired plastic lens, a lens fitting hole is drilled inside the lens frame, and then the outer shape is cut into the desired shape of the lens frame to produce a lens frame, and this lens frame is used for other vision correction purposes. Alternatively, an eye-saving lens is cut into a desired shape and fitted into the lens fitting hole, so that the lens and the lens frame into which the lens is fitted have substantially the same curvature surface. A method of manufacturing a lens frame using a lens. 2. After cutting a plastic lens into the outer shape of a desired lens frame, drill a lens fitting hole at a predetermined position inside the plastic lens to form a lens frame, fit the desired lens into this frame, and insert it into the frame. A method for manufacturing a lens frame using a lens characterized in that a nose piece and a temple are directly attached.