JPH0310747Y2 - - Google Patents

Description

[Detailed description of the invention] <Industrial application field> The invention is applicable to various eye protection devices such as goggles,
This relates to improvements in underwater goggles, dustproof goggles, etc.

<Prior art> Conventional eye protectors that are integrally molded are proposed in publications such as Utility Model Application No. 60-66314, Utility Model Application No. 60-25645, and Utility Model Application No. 60-66314. but,
The lens was flat and the skirt of the frame was steep, resulting in a narrow field of view.

Therefore, a frame was developed in which the entire frame was transparent, but because the thickness was not uniform, the image was distorted and the effect of widening the field of view could hardly be obtained.

On the other hand, the lens is bent and glued so that it can change three-dimensionally along the face to widen the field of view, for example, Utility Model No. 53-51789.
It is disclosed in the publication No.

This device has a thin plate-like lens attached to the frame by bonding it to the frame. However, it is difficult to hermetically adhere a thin plate-like lens to a frame, and there is a problem that it is difficult to apply this method particularly to items that use thick lenses, for example, items with thick lenses such as underwater glasses. In addition, since the adhesive surface inevitably becomes dirty, it becomes necessary to paint the lens to hide the adhesive surface, and manual processing is required for adhesion, resulting in high costs.

On the other hand, Japanese Utility Model Application Publication No. 61-118325 proposes an eye protector in which a fluoroscope part and a frame part are integrated to form a lens in a three-dimensional plane.

The lens of this product is made of the same material that can be seen through, and by forming an almost right-angled bent part with a small radius of curvature, the front see-through mirror part and the side frame part are integrally molded, making it possible to see through from the side as well. It has a broader perspective.

However, in this case, there is a bend at a nearly right angle with a small radius of curvature between the fluoroscope section on the front and the frame on the side, so the image seen through the lens is distorted at this bend.
The range that can be seen through the front fluoroscope without distortion is almost the same as that of a flat plate.
The problem is that the field of view cannot be made wider than conventional methods.

Furthermore, by forming the bent portions from the same material, the front endoscope part and the side frame part must be integrally molded, which makes it difficult to mold into a predetermined shape, and furthermore, the bending of the lens after molding is difficult. There is a problem in that it is difficult to maintain a predetermined shape due to the occurrence of this phenomenon, and is therefore difficult to mold.

<Problem that the invention aims to solve> This invention was proposed in view of the above circumstances.
The objective is to provide an eye protector that allows for wider viewing without image distortion compared to a flat lens, and that allows the lens to be easily formed into a predetermined three-dimensional plane at low cost.

<Means for Solving the Problems> The present invention solves the above problems by providing an eye protector having the following features.

The eye protection device of the present invention includes a lens 1 and this lens 1.
A frame 2 made of synthetic resin that holds the frame 2 is provided.

The synthetic resin frame 2 has a holding portion that holds the peripheral edge of the lens 1.

The lens 1 has elasticity and is a three-dimensional plane that substantially follows the face in at least one of the vertical and horizontal directions. And this three-dimensional plane is lens 1
One end is curved into a shape that allows the image to be seen through the entire lens without distortion, and is positioned at a position set back to the rear from the other end. Further, this lens 1 is held in a holding portion of a synthetic resin frame 2 by integral injection molding with the synthetic resin frame 2.

During this holding, the lens 1 is formed into a predetermined shape from a flat plate to a three-dimensional plane.

<Function> In the present invention, one end of the lens is curved into a shape that allows the image to be seen through the entire lens without distortion, thereby arranging it in a position that is set back from the other end to form a three-dimensional plane. In order to form a lens, the angle formed by the line connecting a fixed point on the rear side of the lens and one end of the lens and the line connecting the other end can be made wider than that of a flat plate. You can widen your field of view. At this time, the wide-angle lens does not have a bent portion with a small radius of curvature that would distort the image, so the image can be clearly seen from the entire lens.

In addition, the lens is held in the holding part of the synthetic resin frame by integral injection molding with the synthetic resin frame, and during this holding, the lens is formed into a predetermined shape from a flat plate to a three-dimensional plane. It can be easily formed into a predetermined three-dimensional planar shape that does not include a bent portion with a small radius. Moreover, since the lens is held by the synthetic resin frame after molding, it is possible to prevent the lens from bending.

<Embodiment> FIGS. 1 and 2 show underwater goggles showing an embodiment of the present invention, with FIG. 1 being a front view and FIG. 2 being a partially cutaway plan view.

Hereinafter, preferred embodiments of the invention will be described in detail by way of example with reference to the drawings.

However, the dimensions, shapes, materials, relative positions, etc. of the components described in this example are not intended to limit the scope of this invention, unless specifically stated. , is merely an illustrative example.

In addition, the up, down, left, and right in the following explanatory text indicate the up, down, left, and right in the corresponding explanatory diagram.

As shown in FIG. 1, the underwater goggles of the present invention consist of lenses 1, frames 2, pads 3, and other accessories.

As shown in FIG. 2, the lens 1 is made of a flat transparent resin plate made of polycarbonate, propionate, etc., is curved vertically in the figure roughly along the face, and is integrally injection molded with the frame 2.

The frame 2 is made of resin such as ABS or polycarbonate, and other materials such as the pads 3 are the same as conventional ones. The material of the pad 3 includes not only sponge but also all flexible materials such as raw rubber and vinyl chloride.

Next, a method of manufacturing this underwater goggles will be explained.

There are roughly the following three manufacturing methods, which will be explained in order, but any method may be used in implementation.

First method: First, a flat lens 1 is heated to soften it, and then pressed with a mold to form a three-dimensional curve.

Then, the molded lens 1 is insert molded and integrally injection molded with the frame 2.

Second method The lens 1 is a flat plate, and is inserted into a mold in a curved manner.

Then, before the mold is tightened, the movable mold is attached to lens 1.
be held in a curved state.

After the mold is completely tightened, the resin for the two parts of the frame is injected and integrally injection molded.

Third method The lens 1 is flat like the second method.

Then, as the mold is tightened, the movable mold presses the lens 1 and curves it.

After the mold is completely tightened, the resin for the two parts of the frame is injected and integrally injection molded.

The above three examples are manufacturing methods.

The underwater glasses made in this way are the conventional ones (second type).
Compared to the one shown by the broken line in the figure), it has the following effects.

B. Your field of vision becomes wider.

Conventional one…Angle α The one of this invention…Angle β The field of view becomes wider by β-α degrees.

B Of course, since it is integrally molded, it is not only completely waterproof and airtight, but also has a beautiful finish.

C. There is no process of gluing the lens 1 to the frame 2, so the cost is low.

In particular, when manufacturing by the second and third methods, the step of curving the lens 1 is also eliminated.

D. Since the lens 1 is a curved flat plate, distortion is less likely to occur in the lens 1 than in a molded lens.

The above is the explanation of the embodiment.

In this example, an example of underwater goggles with left and right lenses is shown, but it may of course be used for underwater goggles in which the left and right lenses are integrated. It can also be used for things such as eyeglasses.

Furthermore, although resin is used as the material of the lens 1 in the example shown, the material may also be glass (including flexible glass), and the shape of the lens may not only be curved as in the example, but also partially curved. A bent portion may be provided, or a flat plate may be simply bent.

Furthermore, the shape of the lens 1 may be changed vertically and horizontally along the face, and regarding the molding method of the lens 1, although some molding distortion may occur in the lens, it is an injection molded product (commonly called one-shot molding). It is also good as a product.

<Effects of the invention> As described in the above embodiments, the eye protection device of the invention forms the lens into a three-dimensional plane that allows the image to be seen through the entire lens without distortion. A line connecting one end of the lens,
The angle formed by the line connecting the other end side can be made wider than that of a flat plate, and the field of view can be widened. At this time, the wide-angle lens does not have a bent portion with a small radius of curvature that would distort the image, so the image can be clearly seen from the entire lens.

In addition, the lens is held in the holding part of the synthetic resin frame by integral injection molding with the synthetic resin frame, and during this holding, the lens is forcibly formed into a predetermined shape from a flat plate to a three-dimensional plane. During molding, it can be easily formed into a predetermined three-dimensional planar shape that does not include bent portions with small curvature, and can be manufactured at low cost. Moreover, since the lens is held by the synthetic resin frame after molding, it can be prevented from bending and maintained in a predetermined shape.

Thereby, the lens can be easily manufactured into a predetermined shape on a three-dimensional plane.

As described above, the present invention has been able to provide a useful and practical eye protection device that has a wide field of view and can be easily manufactured at low cost.

As described above, the present invention is a useful and practical invention.

[Brief explanation of drawings]

1 and 2 show underwater goggles showing an embodiment of the present invention, with FIG. 1 being a front view and FIG. 2 being a partially cutaway plan view. 1...lens, 2...frame.

Claims (1)

[Claims for Utility Model Registration] Comprising a lens 1 and a synthetic resin frame 2 that holds the lens 1, the synthetic resin frame 2 has a holding part that holds the peripheral edge of the lens 1, and the lens 1 has elasticity. This three-dimensional plane is curved into a shape that allows one end of the lens 1 to see through the entire lens without distortion. This lens 1 is held in a holding part of a synthetic resin frame 2 by integral injection molding with the synthetic resin frame 2, and this lens An eye protection device characterized in that a lens 1 is formed into a predetermined shape from a flat plate to a three-dimensional plane when held by integral injection molding with a resin frame 2.