JPH0132017Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a lens fixing device for eyeglasses that allows lenses to be easily and reliably attached to and removed from frames.

Conventionally, when attaching a lens to a frame of eyeglasses, if the frame is made of synthetic resin, the lens is heated and the thermal expansion is used to attach the lens, but in the case of a metal frame, a part of the frame is attached. , or men's mounting frame with screws. It is attached by tightening it with a nut. Therefore, a small screw. Screwing the nuts together is difficult, and the screws and nuts tend to loosen, which causes the lens to fall off accidentally.

In view of this, the present invention proposes a lens fixing device that allows the lens to be mounted easily and reliably, and further eliminates the loosening of the lens.

The present invention will be explained below based on the illustrated embodiments.

In the figure, 1 is a lens frame made of materials that can be used as eyeglass frames, such as synthetic resin, metal, and other natural materials, and is formed into a desired design. A temple 3 is provided via a hinge 2, respectively.

A part of this lens frame 1, for example, the first
As shown in the figure, the upper edge piece 1c of the lens frame can be fixed to the connecting part 1a between the left and right lenses, which corresponds to the bridge of the nose, or to the vicinity 1b where the temples 3 are connected on both outsides of the lens frame, so that it can be fixed to each lens of the lens frame. Alternatively, the lens fixing device 4 of the present invention is provided on the lower edge piece 1d. This lens fixing device 4 has a so-called turnbuckle shape, and has two threaded rods 5 and 6 arranged on the same straight line with the same pitch but with different screw directions, that is, a right-handed thread and a left-handed thread. A threaded body 7 (which may have knurling on the outer circumferential surface) is screwed between both threaded rods 5 and 6 to connect the threaded rods, and one end of each threaded rod 5 and 6 is screwed together. In Fig. 1, it is fixed to the center of the upper edge piece of the lens frame and to the connecting part 1a facing the bridge of the nose, and in the case shown in Fig. 2, Fig. 3, and Fig. 4, the lens frame is They are separated and embedded and fixed on both end surfaces of the opposing lenses. At this time, even when the threaded body 7 is rotated and the opposing frame end pieces come into contact with each other, various shapes of the part to be embedded and fixed in the frame can be adopted so that the threaded rod is firmly integrated with the frame body. An example is shown in FIG.

The one in Figure 6 is a threaded rod in which two threaded bodies with different thread directions are embedded and fixed in the frame, and a right-handed thread and a left-handed thread are carved at both ends between the opposing threaded bodies 8, 8. A screw body 9 having protruding portions 9a and 9b is disposed, and the threaded rod portions 9a and 9b are screwed into the threaded body 8, respectively, and its operation is the same as that of the embodiment shown in FIG.

According to the present invention, the diameter of the frame to which the lens is fixed can be expanded within the allowable elasticity of the material of the frame by rotating the screw body screwed together between the opposing screw rods to the left or right. Because it can be opened or contracted, it requires a screw. Compared to the nut type, it is easier to attach and detach the lens, and by carving knurling etc. on the outer peripheral surface of the threaded body, there is an advantage that the lens can be attached and detached without using any tools.

[Brief explanation of the drawing]

Figure 1 is an external view, Figures 2, 3, and 4 are external views of different embodiments from Figure 1, each figure in Figure 5 is an enlarged view of the lens fixing device, and Figure 6 is an enlarged view of the lens fixing device. 6 is a diagram showing a different embodiment of FIG. 5; FIG. 1... Lens frame, 1a... Continuous part, 1
b...Near the temple connecting part of the lens frame, 1c
...Upper edge piece, 1d...Lower edge piece, 4...Lens fixing device, 5, 6...Screw rod, 7, 8...Screw assembly, 9
...Screw body, 9a, 9b...Screw rod portion.

Claims (1)

[Scope of utility model registration request] Two threaded rods of the same pitch but with different threaded directions are arranged facing each other on the same axis line in a part of the lens frame which is designed to fit and hold the lens. A lens fixing device for eyeglasses, comprising a lens fixing device formed by screwing together a screw body, and fixing the lens by expanding and contracting the lens frame within the allowable elasticity of the material of the lens frame.