JPS5921003B2 - Multifocal eyeglass frame - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a multifocal eyeglass frame that is convenient to use by allowing the lenses to be moved up and down and at the same time to change the angle by a simple operation.

For example, as shown in Japanese Utility Model Publication No. 53-39561, the lens frame is moved up and down by sliding the nose piece and moving the lens frame up and down, thereby connecting the distance lens part and the near point lens part. It is known that they are used differently.

By the way, this device not only has an extremely complicated mechanism for moving the nose piece up and down, but also moves the nose piece up and down by moving up and down a member attached to the inside of the central connecting piece that connects the centers of the left and right lens frames. In other words, the vertical movement is performed in a very narrow space directly in front of the eyes, relying mostly on intuition.
The operation is awkward, cumbersome, and troublesome.

Furthermore, it also has drawbacks as shown in FIG.

In other words, when using the distance lens part and supporting the main body in a lowered state with the nose piece raised in order to see far away under normal conditions, the line of sight and the lens are almost perpendicular to each other. However, when using the near-point lens section and lowering the nose piece to support the main body while looking at the hand, the main body is lower than when using the far-point lens section. As the lens is directed slightly upward and the line of sight is directed downward to look at the hand, the line of sight and the lens are no longer perpendicular to each other, causing eye fatigue.

In addition, in Japanese Utility Model Publication No. 42-9637, leg rods are rotatably attached to the insides of the left and right lens frames, the front ends of both leg rods are connected by a connecting part, and the rear ends are each equipped with nose pads. The one with the piece attached is shown.

By moving the connecting portion up and down, the leg rods are rotated to move the nose piece up and down, and the main body is moved up and down so that the distance lens portion and the near point lens portion can be used separately.

In this case as well, the operation part is right in front of you, making operation difficult and troublesome. At the same time, when using the near-point lens part, the line of sight and the lens are not perpendicular to each other, which causes eye fatigue. It is the cause.

SUMMARY OF THE INVENTION An object of the present invention is to provide a highly practical multifocal eyeglass frame that allows the lenses to be moved up and down and at the same time to change the angle with a simple operation so as not to cause eye fatigue.

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a perspective view showing the main parts of an embodiment in which the present invention is applied to bifocal glasses.

A indicates the main body of the glasses, and the main body A connects the left and right lenses 1°1, the lens frames 2, 2 of the lenses 1, 1, and the left and right lens frames 2, 2 slightly above the center. It consists of a central connecting piece 3.

The lens 1 is a bifocal lens in which a near-point lens section 5 is integrally formed in a far-field lens section 4 at a slightly lower position.

Support frames 6, 6 are attached to the outer end sides of the lens frames 2, 2, respectively.

The support frame 6 is made up of an upper plate 7, a side plate 8, and a lower plate 9, and has a U-shaped cross section.

Moreover, the upper plate 7 is tilted forward (upwardly upward), so that there is a gap between it and the lower plate 9.

One end of a connecting piece 10 is inserted between the upper plate 7 and the lower plate 9, and the connecting piece 10 and the side plate 8 are rotatably attached by pins 11.

The rear end side of the connecting piece 10 is connected to the frame leg 12 via a hinge.

Then, slightly below the central connecting piece 3, the lens frame 2,
Supports 13° 13 are attached to the inner sides of the 2, facing each other, and nose pieces 14 are attached to the tips of the supports 13 and 130, respectively.
, 14 are installed.

The nose piece 14 is bent in the vertical direction (in the shape of a square),
The surface includes an upper current surface 15 located above and a lower current surface 16 located below.

The distance l between the upper contact surfaces 15 and 15 of the two opposing nose pieces 14 and 140 is made to match the distance l between the lower contact surfaces 16 and 16.

The device shown in FIG. 1 is used in the following manner.

First, when viewing far distances in normal conditions while using the far distance lens sections 4, 4, as shown in FIG. 2, frame legs 12, 1
Rotate upward and straighten lens frame 2,
2 and frame legs 12.

12 is worn in a state where they are almost perpendicular to each other.

At this time, the bottom surfaces of the connecting pieces 10, 100 on the tip side are in contact with the lower plates 9, 9 of the support frame 6.6.

FIG. 2 is a somewhat schematic partial cross-sectional side view showing the state of use, and the island-shaped part shown with hatching near the root of the nose is the contact area on which the nose pad pieces 14, 140 contact.
The contact surfaces 17, 17 are the contact surfaces 17, 17, but in the state shown in FIG.
, 17, and the upper contact surface 15°15 supports the main body A in a lowered state.

Note that the distance between the left and right abutment surfaces 17, 17, which connect substantially the center of each of them, corresponds to the distance 1 described above.

In the wearing state shown in FIG. 2, the main body A is supported in a lowered state, and the distance lens part 4°4 is located approximately in the center of the line of sight, and the line of sight for distance vision and the lens 1 are
, 1 are almost perpendicular to each other.

In this state of wearing, the near point lens portion 5°5 is at a lower position where it does not get in the way, so the far lens portions 4, 4
It is possible to achieve a comfortable wearing feeling by eliminating problems such as making the boundary between the lens portion 5 and the near-point lens portions 5, 5 distracting, and making the feet blurry.

Next, when reading or looking at something at hand, hold the main body A and pull the lower side of the main body A backward (while applying force to tilt the main body A forward). , 6 are bent with respect to the frame legs 12, 12 around the pins 11, 11, and the main body A is in a state of being slightly tilted forward.

At this time, the upper surfaces of the connecting pieces 10, 100 on the distal end side are in contact with the upper plates 7, 7 of the support frame 6°6.

When worn in this state, as shown in Figure 3, the nose piece 1
4, 14 lower contact surface 16.16 is the contact surface 1 on both sides of the nose
7°17, the main body A is supported while being slightly lifted upward and tilted slightly forward.

The near point lens parts 5, 5 are also slightly closer to the eyes.

Incidentally, tilting the main body A forward also reduces the distance between both ears and the nose pieces 14, 14, and also serves to lift the main body A.

Therefore, due to the synergistic effect of tilting the main body A forward and supporting the nose piece 14, 140 at the lower surface 16° 16, the main body A can be supported in an elevated state.

As shown in Fig. 3, when the main body A is supported in a slightly tilted forward and slightly lifted state, the near point lens parts 5, 5 are also slightly tilted forward and lifted slightly, and the visual field is It's closer to the center and even closer to the eyes.

When using the near-point lens parts 5, 5, we often look at things at hand, but when we look at things at hand, our line of sight is directed downwards, so the main body A is tilted slightly forward. Therefore, the lenses 1, 1 have an inclination angle that is almost perpendicular to the line of sight.

Since the near-point lens parts 5, 5 are close to the center of the visual field and are almost perpendicular to the line of sight, the eyes will not get tired (the inclination angle of the glasses is 5 when using the far-field lens part). From a medical point of view, the ideal angle is between 10 degrees and around 20 degrees when using the near point lens.

) 3 Also, it is closer to the eyes (so the field of view of the near-point lens parts 5, 5 is expanded).

In addition, in order to return the state shown in FIG. 3 to the state shown in FIG. 2, the lower side of the main body A can be pushed forward to return the main body A and the frame legs 12, 12 to a substantially perpendicular state, and the wearer can be worn as is.

The upper contact surfaces 15, 15 of the nose piece pieces 14, 140 are the contact surfaces 17,
17 and returns to the state shown in FIG.

As is clear from the above, the nose piece 14 is formed by bending in a dogleg shape in the vertical direction, and has an upper contact surface 15 located above and a lower contact surface 16 located below on its surface. This was done by correcting the contact angle of the rear side surfaces of the nose pieces 14, 14 with the contact surfaces 17, 17 due to the rotation of the main body A, and at the same time supporting the main body A in an elevated state or lowering it slightly. This is to support the device in a suspended state.

Further, the reason why the distance 1 between the upper contact surfaces 15 and 15 of the nose pad pieces 14 and 140 is made to match the distance l between the lower contact surfaces 16 and 16 is because the contact surfaces 17 and 15 on both sides of the nose are made to match. 17 is the same constant distance 1, so whether the upper contact surfaces 15, 15 are applied or the lower contact surfaces 16, 16 are applied, the main body A is supported by applying it to the same contact surfaces 17°17.

FIG. 4 shows three types of deformation of the nose piece 14. The upper side of each is a front view of the nose piece 14, and the lower side is a front view of each nose piece 14. FIG. 3 is a side view of each.

The one in (a) has an elliptical upper surface 15
and the lower temporary surface 16 are arranged so as to form an approximately figure eight shape.

In the case of (b), the tip of the support 13 is bifurcated, and nose pieces 14, 14 are separately attached to the bifurcated tips, respectively.
An upper contact surface 15 and a lower contact surface 16 are formed on each of the nose pad pieces 14, 14, respectively, and the angle of the nose pad pieces 14, 14 can be finely adjusted.

(In the case of /→, a straight part 18 is provided between the upper temporary surface 15 and the lower temporary surface 16;
The distance between the main body A and the main body A is widened to allow a large amount of vertical movement of the main body A.

In previous embodiments, a separate nose piece 14.1
4 is attached to the lens frames 2, 2. For example, if the lens frames 2, 2 are made of plastic, the nose pieces 14, 14 each have an upper contact surface 15, 15 and a lower contact surface 16. It is also possible to form the lens frames 2, 2 by integral molding.

Further, as shown in FIG. 5, the upper temporary surface 15.15 is formed integrally with the lens frames 2, 2, and the lower temporary surface 16.16
It is also possible to form only this as a separate body and attach it to the lens frames 2, 2.

Conversely, the lower contact surfaces 16, 16 may be formed by integral molding, and the upper contact surfaces 15, 15 may be attached as separate parts.

Further, in the embodiments described above, the nose piece 14 may be fixed so that it does not move at all, or the nose piece 14 may be fixed so that it does not move at all.
so that it fits tightly when it comes into contact with the contact surface 17 of the nose,
It goes without saying that the nose piece 14 may be fixed so that it has some play.

Furthermore, in the embodiments so far, the nose piece 14 is fixed, and the upper part 15 and the lower part 1 are fixed to each other.
Although two temporary surfaces 6 and 6 are provided, the same effect can be achieved even if the temporary surfaces are combined into one and the nose piece 14 itself is rotated in the vertical direction.

In the embodiment shown in FIG. 6, a recess is provided in the support 13 attached to the lens frame 2, and a ball 20 formed at the tip of a support rod 19 attached to the back of the nose piece 14 is inserted into the recess. I'm wearing it.

The exit side of the recess is a vertically oriented elliptical slit 21 through which the support rod 19 is exposed.

The surface of the nose piece 140 is a curved surface.

Also in this embodiment, when used in a normal state with the far lens parts 4, 4, the frame legs 12,
12 upward and straighten it so that the main body A and the frame legs 12, 12 are almost orthogonal, and at the same time, the nose pieces 14, 14 are rotated upward, so that both sides of the nose are Bring it into contact with the armpit contact surface 17.17.

When worn in this manner, the main body A is supported in a lowered state, and the distance lens parts 4, 4 can be used.

The far lens parts 4, 4 are in a state substantially perpendicular to the line of sight, as shown in FIG.

Next, when using the near-point lens parts 5, 5, lift the main body A and lightly (press) the upper ends of the nose pieces 14, 140 against the edge of the eyebrows. It rotates downward relative to the lens frames 2, 2, but at the same time, after tilting the main body A forward, the nose pieces 14 and 14 are brought into contact with the contact surfaces 17, 17 on both sides of the nose. .

When worn in this way, the main body A is supported in a slightly raised state, the near-point lens parts 5, 5 are close to the center of the visual field, and the main body A is tilted slightly forward. Therefore, the near-point lens parts 5, 5 are in a state of being almost perpendicular to the line of sight, and are also slightly closer to the eyes.

This state is almost the same as shown in FIG.

Then, in order to return to the state where the far lens parts 4, 4 can be used again, it is sufficient to hold the main body A and push the lower part of the main body A forward, and at the same time push the main body A down.

When the lower part of the main body A is pushed out, the main body A and the frame legs 12, 12 return to the almost perpendicular state, and when the main body A is pushed down, the nose pieces 14, 14 are pushed by both sides of the nose and rotate upward. Therefore, if you wear it as is, the distance lens part will be 4°4.
This will put you in a state where you can use it.

Note that the reason why the surfaces of the nose pad pieces 14 and 140 are curved is that while rotating the nose pad pieces 14 and 14 in the vertical direction, the nose pad pieces 14 and 14 are moved to the contact surfaces 17 and 17 on both sides of the nose at the upper and lower positions. This is to correct the contact angle when making contact, and also to soften the contact with the skin by making contact with the contact surfaces 17, 17 with curved surfaces.

In the embodiment shown in FIG. 7, the support rod 19 of the nose piece 14 is inserted through the slit 21 provided in the support body 13.
The tip of the support rod 19 is rotatably attached by a pin 22.

In the embodiment shown in FIG.
3 are rotatably attached by pins 22.

Although an embodiment in which the present invention is applied to a bifocal eyeglass frame has been described above, it goes without saying that the present invention can also be applied to a trifocal eyeglass frame or more.

In FIG. 1, there are frame legs 12 on the outside of both lens frames 2, 2.
, 12 are respectively provided, and the frame legs 12, 12 are attached to the outsides of both lens frames 2° 2 through these rotating mechanisms. Although we have shown one example of such a rotating mechanism, there are many other types of rotation mechanisms other than those shown.
Needless to say, various things can be used.

The structure of the present invention is as described above, and the present invention has the following excellent effects.

In the multifocal eyeglass frame according to the present invention, a rotation mechanism is provided on each outer side of both lens frames 2, 2 to allow the frame legs 12, 12 to straighten out or rotate downward. The frame legs 12, 12 are attached to each other via a rotation mechanism, but these rotation mechanisms have a simple structure.

In addition, although the nose pieces 14, 14 are attached to the inside of both lens frames 2, 2, respectively, if the nose pieces 14, 14 are fixed to the lens frames 2, 2, Since it is sufficient to form two or more temporary surfaces on the surface of .14 with mutually different inclination angles and at positions shifted in the vertical direction, the structure is simple and manufacturing is easy.

Even if the nose piece 14.14 is attached to the lens frames 2, 2 so as to be able to rotate in the vertical direction via a rotation mechanism for vertical rotation, these rotation mechanisms also have a simple structure. It's just a thing.

Therefore, the device according to the present invention has a simple structure and is easy to manufacture as a whole.

In the multifocal eyeglass frame according to the present invention, for example, when the nose pieces 14, 14 are fixedly attached to the inner sides of both lens frames 2゜2, the surfaces of the nose pieces 14, 140 are fixed in the vertical direction. While selecting an appropriate one from two or more temporary surfaces formed at shifted positions,
4 are installed so that they can be rotated in the vertical direction, while selecting the rotation angle of the nose pieces 14, 14 appropriately.
At the same time, the frame legs 12.
While straightening the nose pieces and rotating them downward by an appropriate amount, place the nose pieces 14, 14 on the contact surfaces 1 on both sides of the nose.
7, 17, the lens frame 2,
Of the multifocal lenses fitted in 2, you can raise the lens part you are about to use to a height that is as easy to use as possible, and at the same time, you can set the lens part to be used at an optically ideal angle as much as possible. Therefore, eye fatigue can be prevented.

[Brief explanation of the drawing]

Fig. 1 is a perspective view showing the main parts of an embodiment in which the present invention is applied to bifocal glasses, Fig. 2 is a somewhat schematic partial cross-sectional side view showing the state of use of the device shown in Fig. 1, and Fig. 3 is the same. 1st
4 is a front view and a side view showing three types of deformation of the nose piece 14, and FIG. FIGS. 6, 7, and 8 are perspective views showing various methods of rotatably attaching the nose piece 14 to the lens frame 2, and FIG. 9 is a perspective view showing a conventional example in use. FIG. A...Body, 2...Lens frame, 4...
... Distance lens part, 5 ... Near point lens part, 6 ... Support frame, 10 ... Connection piece,
11...pin, 12...frame leg, 13.
... Support body, 14 ... Nose piece, 15 ...
...Upper for now, 16...Lower for now, 17.
...Abutting surface, 19...Support rod, 20...
...Ball, 21...Slit, 22...
...Pin, 23...Rotating body.

Claims (1)

[Claims] 1. The inner sides of a pair of left and right lens frames 2, 2 into which multifocal lenses are respectively fitted are connected by a central connecting piece 3, and a frame is provided on each outer side of both lens frames 2, 2. The legs 12 and 12 are each provided with a rotation mechanism that can extend them straight or rotate them downward, and the frame legs 12 and 12 are respectively attached via these rotation mechanisms, and both lens frames 2
, 2, a pair of left and right nose pieces 14, 14 are attached facing each other, and these wing pieces 14°1
Reference numeral 4 denotes a multifocal eyeglass frame which is shifted in the vertical direction with respect to both lens frames 2, 2 so as to be able to abut contact surfaces 17, 17 on both sides of the nose. 2. Both wing abutment pieces 14, 14 are fixedly attached to both lens frames 2, 2, respectively, and on their surfaces, two or more wing abutments are provided at different inclination angles and at positions shifted in the vertical direction. A multifocal eyeglass frame according to claim 1, which is formed with equal spacing between opposing surfaces of the contact pieces 14. 3 The wing rest pieces 14.14 can be rotated in the vertical direction via a rotation mechanism for vertically rotating the nose piece 14.14, which is attached to each inner side of the lens frame 2°2. The multifocal eyeglass frame according to claim 1, wherein the frame is attached so as to allow the following. 4. The multifocal eyeglass frame according to claim 3, wherein the nose pieces 14, 14 have curved surfaces.