JPH0433222B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a protective lens that is attached to goggles used for dustproofing, sports, etc., and a method for assembling the same.

(Prior Art) Conventionally, there are goggles equipped with protective lenses, such as those described in Japanese Utility Model Application Publication No. 105415/1983.

As shown in FIG. 8, this conventional lens has a pair of left and right lenses supported by an opaque frame 31 similar to a general eyeglass frame inside a flat main lens 30 attached to the front surface of a goggle body 11e. Vision correction lenses 3e and 3e are attached.

According to this method, even people with poor eyesight can
There is no need to use eyeglasses for vision correction separately from the goggles, which has the advantage of increasing the comfort of using the goggles.

In addition, when the vision correction lenses 3e, 3e are attached to the frame 31, the lenses 3e, 3e
It is necessary to match the center-to-center distance (eye point) of the eye with the user's pupil distance. Therefore, conventionally, as a means for this purpose, for example, as shown in FIG. 9, the lens mounting pitch La of the frame 31 manufactured to a predetermined size and shape is, for example, 60 mm, and the pupil distance of the user is 54 mm.
In this case, the lens body 3 formed in a circular shape etc.
2, 32 is a vision correction lens 3e having a desired external shape;
When processing to 3e, the center O of the lens is set to Lb=3
The reality was that the material was being cut eccentrically inward by mm.

(Problem to be Solved by the Invention) However, the conventional opaque frame 3
In the vision correction lenses 3e and 3e supported by the frame 31, the frame 31 narrows the user's field of vision, making it impossible to obtain a good field of view. This is a critical drawback in terms of safety when performing various tasks using goggles.

Further, the narrow frame 31 supporting the conventional lenses 3e, 3e cannot sufficiently protect the face. Therefore, means for providing the main lens 30 in addition to the vision correcting lenses 3e and 3e on the goggle body is essential, which also poses the problem of complicating the mounting structure.

In addition, without using the main lens 30, the frame 31
Although it is possible to use only the vision correction lenses 3e, 3e supported by the goggle body 11e, it is possible to use only the vision correction lenses 3e, 3e with prescription.
There is a certain limit to how large the area can be, and this has the disadvantage that it is not possible to secure a large field of view.

Furthermore, an important problem is that in the processing and mounting means for the vision correction lenses 3e, 3e that correspond to the conventional frame 31 shown in FIG. It requires cutting and machining, making mass production impossible. In the end, vision correction lenses are produced on a per-order basis, and they also have the drawback of being extremely expensive to manufacture.

Therefore, the present invention widens the field of view when a protective lens with a vision correction function is attached to goggles or the like, enables appropriate protection of the face, and simplifies the production of the protective lens. The purpose is to reduce manufacturing costs by making it possible to mass produce.

(Means for Solving the Problems) The present invention aims to solve the above-mentioned conventional problems by providing a protective lens with a vision correction function of a novel configuration that has not existed in the past, and a method for assembling the same. It is something.

That is, first, the main body has a pair of left and right holes 2,
2, and a pair of left and right vision correction lenses 3, 3 fitted into holes 2, 2 of the main body lens 1. It is a protective lens.

Second, the present invention is a protective lens for goggles, etc., in which the main body lens 1 is divided into left and right halves in the above-mentioned configuration.

Thirdly, the present invention provides a method for assembling the above-mentioned protective lens. First, the distance L between the pair of left and right holes 2,
A plurality of main body lenses 1 with different diameters and a plurality of vision correction lenses 3, 3 having the same external shape with the lens center positioned at a fixed position and with different powers are prepared. From hole 2,
Select the main lens 1 whose interval L between 2 matches the desired pupil distance and the vision correction lenses 3, 3 of the desired power, and then insert the vision correction lenses into the holes 2, 2 of the selected main lens 1. This is a method of assembling protective lenses for goggles, etc., in which lenses 3 and 3 are fitted and attached.

(Function) Since the protective lens of the first configuration is equipped with the vision correction lenses 3, 3, there is no need to use glasses for vision correction separately. Since the lenses 3, 3 are attached to the transparent main body lens 1, a wide field of view can be secured without making the vision correction lenses 3, 3 unnecessarily wide in area. Moreover, since the main body lens 1 supports the vision correcting lenses 3, 3, the main body lens 1 can be used to appropriately protect parts other than the face covered by the vision correcting lenses 3, 3. According to the present invention, vision correction and protection over a wide area of the face can be achieved with a single protective lens.

Furthermore, the vision correction lenses 3, 3 are the main body lens 1.
Since the structure is such that it is fitted and installed in the holes 2, 2,
By changing the formation positions of the holes 2, 2, the distance between the vision correcting lenses 3, 3 can be easily changed in accordance with the pupil distance of the user.

In addition, in the case where the main body lens 1 of the second configuration is divided into left and right halves, the left and right halves of the protective lenses are substantially the same member, so one protective lens can be replaced with two. If manufactured, a set of protective lenses can be manufactured, and the manufacturing thereof becomes easy.

Furthermore, in the method for assembling the protective lens of the third configuration, the main lens 1 and the vision correction lenses 3, 3 corresponding to the pupil distance and lens power of the user are selected and fitted together. Since it is only necessary to assemble the main body lens 1 and the vision correction lens 3 in consideration of the pupil distance etc. for each user's order, there is no need to cut the vision correction lenses 3, 3, which are prepared in advance. , 3 can be mass-produced.

(Example) Examples of the present invention will be described below.

First, an example of the protective lens will be explained. In Fig. 1, 1 is a main lens made of transparent synthetic resin;
The entire thickness is approximately uniform and does not have a vision correction function. Further, its outer shape is formed into an appropriate shape according to the shape of the opening of the goggles or the like to be worn. Reference numerals 2 and 2 indicate a pair of holes for attaching vision correction lenses, which are opened at two places on the left and right sides of the main body lens 1.

Reference numeral 3, 3 is a vision correction lens made of transparent synthetic resin or the like formed as a concave lens. On the back side thereof, as shown in FIG. A collar portion 6 having a larger diameter than the protruding step portion 5 is formed on the outer peripheral portion of the side. 7,7
The vision correction lenses 3, 3 are partially cut-out ring-shaped retaining frames for fixing them to the main lens 1, and screw bodies 9 for tightening the retaining frames 7 are screwed into both notched ends 8, 8. has been done.

The protective lens according to this embodiment is composed of the above-mentioned components, and an example of how to assemble them will be described next.

First, as shown in FIG. 3, a large number of main body lenses 1 are prepared in which the pitches of the holes 2, 2 are shifted in multiple stages from L ₁ , L ₂ to Ln. Specifically, the pitch is set to 1 in the range of 55 mm to 80 mm, for example.
Prepare 26 types with different dimensions in mm increments. All elements other than the pitch may have the same size and shape. On the other hand, the lenses 3 and 3 for vision correction are lenses whose power differs in steps of 0.25.
Prepare the types. The outer shapes of the vision correcting lenses 3, 3 may all be the same, and the center points of the lenses may also be at the same position.

If we receive an order for a protective lens from a user in the above preparation state, we will select the main lens 1 with the holes 2, 2 opened at a pitch L that matches the pupil distance of the user, and the vision correction lens 3, 3 may be selected depending on the visual acuity of the user, and the vision correction lenses 3, 3 may be incorporated into the main body lens 1. Since the vision correction lenses 3, 3 have the same outer shape and the same lens center, they can be properly attached to the selected main body lens 1, and the distance between the lens centers is exactly the same as the user's pupil distance. It is possible to create something that matches.

To assemble the lens, as shown in FIG. It is only necessary to tighten the screw body 9 using the screws. Since the flange 6 and the stopper frame 7 of the vision correction lens 3 sandwich both sides of the main lens 1, the lens 3 can be mounted securely.

Next, the protective lens 10 assembled as described above is used by being attached to a goggle body 11 as shown in FIG. 4, for example. The mounting operation involves bringing the outer periphery of the protective lens 10 into contact with the flange 13 that protrudes from the inner periphery of the opening 12 formed on the front surface of the goggle body 11, and using a separately prepared holding frame 14. The locking convex portions 15 protruding from the outer periphery of the holding frame 14 are disposed on the front surface of the goggle body 11 from the front side thereof, and are connected to the engaging recesses 16a of the goggle body 11.
It is only necessary to attach it by detachably locking it to.... With this, the protective lens 10 is attached to the goggle body 11.
can be exchanged freely. In addition, presser frame 1
4 is formed to have a narrow width S as a whole and is provided with a wide-area hole 17 for viewing. Further, a colored lens 16 is attached to the upper edge of the holding frame 14 so as to be rotatable up and down.

Since the goggles assembled as described above as shown in FIG. Since the main body lens 1 supporting the vision correcting lenses 3, 3 is transparent, its field of view can be made very wide and safety can be ensured.

Further, the goggles can be applied to work such as welding by lowering the colored lens 16, and thereby the protective lens 10 can be covered and protected. Furthermore, since the protective lens 10 is removable from the goggle body 11, a protective lens suitable for each user can be used, and when used by a person with normal eyesight,
Protective lens 1 comprising vision correction lenses 3, 3
0, it is also possible to use a simple transparent protective lens that does not have a vision correction function.

In the above embodiment, one main body lens 1 has two
Although two holes 2, 2 are provided, the present invention is by no means limited thereto.

For example, as shown in FIG. 6, the main body lens 1 according to the above embodiment is divided into left and right parts.
It may be formed as a. In the main lens 1 shown in FIGS. 1 and 2, when performing drilling work by changing the pitch of the pair of holes 2, 2, two drilling tools are used to change the pitch of both of these drilling tools. Although it is necessary, the two lenses 1a and 1 shown in FIG.
Since a is substantially the same lens, a simple drilling operation can be performed using a single drilling tool.

Further, in the above embodiment, since the shape of the vision correction lens 3 is such that the tapered surface portion 18 is formed on the inner lower edge (see FIG. 2), the two vision correction lenses 3, 3 A large space is provided below between the lenses 3, 3, so that even if the lenses 3, 3 are brought quite close to each other, these lenses will not protrude outside the main lens 1, and the lenses 3, 3 will not unduly abut against the user's nose. There are advantages that can be achieved. However, the specific shape of the example lenses 3, 3 is by no means limited to this, and the design can be changed to various other shapes. Therefore, the specific shape of the hole 2 of the main lens 1 can also be changed as desired.

Furthermore, the present invention is not limited to the specific means for attaching the vision correction lens 3 to the main body lens 1 as described above. Instead of the fastening frame that is fastened with the screw body 9, a ring body made of an elastic member is attached to the back side of the vision correction lens 3 in a manner that prevents it from coming off, or the vision correction lens 3 is glued to the main body lens 1. It may be fixed using an agent. However, for practical purposes, it is preferable that the vision correction lens 3 is detachable from the main body lens 1.

In this way, the specific configurations of the main body lens 1 and vision correction lenses 3, 3 according to the present invention can be freely changed in design. In addition, the protective lens according to the present invention can be used by being attached to various types of goggles such as light-shielding goggles for welding, etc., dustproof goggles, and goggles for sports such as skiing and diving, as well as a helmet 19 as shown in FIG. It can also be applied as the protective lens 10 attached to the dust mask 20, and its specific use is not limited at all. Incidentally, since the lenses 3, 3 for vision correction are usually formed in a spherical shape as shown in FIG. It is preferable that the lens elements 3 and 3 do not protrude unseemly from the main lens body 1.

Further, the method for assembling the lens of the present invention, the specific number of main body lenses 1 to be prepared in advance, the dimensions for different hole pitches, etc. are not limited as in the above embodiments, and can be freely changed within the scope intended by the present invention. It is.

(Effects of the Invention) As described above, the present invention provides a protective lens comprising a transparent main body lens having a pair of left and right holes, and a pair of left and right vision correction lenses that are fitted and attached to the holes of the main body lens. Because of this structure, there is no need to use general eyeglasses for vision correction in addition to the protective lenses, and there is no need to use ordinary eyeglasses for vision correction, as in the past, where the opaque frame that supports the vision correction lenses narrows the field of vision. It has the special effect of not causing any inconvenience and ensuring a good field of vision without having to make the vision correction lens unnecessarily large, making it ideal for various tasks, sports, etc. I've reached it.

Moreover, since the main body lens supports the vision correction lens, the main body lens can be used to properly protect areas other than the face covered by the vision correction lens, and can be used separately from the vision correction lens as in the past. There is no need to use face protection lenses, and a single protective lens can correct vision and protect a wide area of the face, simplifying the overall structure of goggles, etc., and further increasing their usability. effective.

Furthermore, since the present invention has a structure in which the vision correction lens is fitted into the hole provided in the main body lens, the distance between the vision correction lenses can be adjusted to suit the user's pupil by simply changing the formation position of the hole. There is also the advantage that the position can be easily changed in accordance with the distance, and that manufacturing work that conforms to the actual situation when using a vision correction lens is facilitated.

Furthermore, according to the means of dividing the main body lens into left and right halves of the present invention, these left and right halves of the protective lenses are substantially the same member, so if two of one protective lens are manufactured, one set is obtained. This makes it possible to manufacture a protective lens, which has the advantage of making the manufacturing process easier.

Furthermore, according to the method for assembling a protective lens of the present invention, the main body lens and vision correction lens corresponding to the pupil distance and lens power of the user are appropriately selected from a plurality of main body lenses and vision correction lenses. Because all you need to do is fit and assemble, there is no need for the complicated labor of cutting vision correction lenses taking into account the pupillary distance and other factors for each user's order, and the main body lens can be prepared in advance. and vision correction lenses can be mass-produced, and the manufacturing cost of each of these parts and the manufacturing cost of the ultimately obtained protective lens can be significantly reduced compared to the past, and the protective lens according to the present invention There is an excellent practical benefit in that it can be provided at low cost.

[Brief explanation of drawings]

1 and 2 show an embodiment of the protective lens according to the present invention, and FIG. 1A is a perspective view of the assembled state;
FIG. 1B is an enlarged sectional view taken along the line X--X of FIG. 1A, and FIG. 2 is an exploded perspective view. FIG. 3 is a front view showing a plurality of main body lenses. FIG. 4 is an exploded perspective view of the protective lens attached to the goggles. FIG. 5 is a cross-sectional view of goggles with protective lenses attached. FIG. 6 is a front view showing another embodiment of the main body lens. FIGS. 7A and 7B are explanatory diagrams showing other usage examples. 8 and 9 show a conventional example, in which FIG. 8A is a front view and FIG. 8B is a sectional view taken along the line Y--Y in FIG. 8A. FIG. 9 is an explanatory diagram of the frame and lens. FIG. 10 is a sectional view showing another embodiment of the present invention. 1... Main body lens, 2, 2... Hole, 3, 3... Lens for vision correction.

Claims (1)

[Scope of Claims] 1. A transparent main body lens 1 formed with a pair of left and right holes 2, 2, and a pair of left and right vision correction lenses fitted and attached to the holes 2, 2 of the main body lens 1. 3,
A protective lens for goggles, etc., characterized by comprising: 3. 2. A protective lens for goggles, etc., as set forth in claim 1, characterized in that the main body lens 1 is divided into left and right halves. 3 A plurality of main body lenses 1 with different distances L between the pair of left and right holes 2, 2, and a plurality of vision correction lenses having the same external shape, with the lens center positioned at a fixed position, and with different powers. 3, 3 are prepared, and from these, the main lens 1 whose distance L between the holes 2, 2 matches the desired pupil distance and the vision correction lenses 3, 3 of the desired power are selected, and then A method for assembling a protective lens for goggles or the like, which comprises fitting vision correction lenses 3, 3 into the holes 2, 2 of the selected main body lens 1.