JPH028255Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to eyeglasses in which a trifocal lens is fitted into an eyeglass frame that can be moved up and down.

When using a trifocal lens fitted into a spectacle frame, the line of sight will be the distance lens part, intermediate distance lens part, and It is desirable that it be located at the optical center of the near point lens section. If it deviates from the optical center, the field of view becomes narrower, and image jumping occurs due to the prism phenomenon, making it very difficult to see and causing eye fatigue.

By the way, the range in which the angle of the eye's line of sight can be changed is extremely small when looking at a far distance, when looking at an intermediate distance, and when looking at a close range. When using trifocal lenses with conventional eyeglasses that do not move up and down, it is necessary to arrange the distance lens section, intermediate distance lens section, and near point lens section to accommodate the slight angle change. There is no choice but to arrange the lens parts so that their optical centers are very close to each other, and therefore, there is no other choice but to arrange the optical centers of each lens part and the boundaries of each lens part close to each other. Therefore, these problems were solved by cutting off the top and bottom of the circle to make it a rectangle or an inverted semi-cylindrical shape. By the way, when the intermediate distance lens part and the near point lens part are circular, if they are made extremely small, they can be placed close to each other. The diameter of the circular lens cannot be made extremely small because the lens part for the lens cannot be made large enough to obtain a sufficient field of view, so the diameter of the circular part cannot be made extremely small. I couldn't do it.

Various trifocal lenses have been known, including the one shown in Japanese Utility Model Application Publication No. 52-4839, but in these trifocal lenses, the shapes of the intermediate distance lens portion and the near point lens portion are For the reason mentioned above, it is not circular, but has a shape with the top and bottom of the circle cut off.

By the way, if such a cut shape has a step at the boundary, the step will be noticeable and the appearance will be poor. The higher the power, the more noticeable this difference becomes, but in recent years more and more people are becoming particularly concerned about the appearance.

If the shape of the intermediate distance lens part and the near point lens part is circular, the boundaries will be less noticeable, resulting in an excellent appearance. However, such a lens has the disadvantage that the optical centers of each lens part are separated from each other.

By the way, when a conventional trifocal lens is used in a conventional eyeglass frame that does not move up and down, even if the intermediate distance lens section or the near point lens section is cut to minimize the appearance, the angle of sight cannot be adjusted. You select the lens part you need by changing it little by little, and with just a slight change in the angle of your line of sight, you can accurately align your line of sight with the lens part you want to use and see the object. It was very difficult for me to do this, and as a result I often had to look at things while rapidly rotating my eyeballs or taking an unnatural posture. Furthermore, because conventional eyeglass frames are fixed and do not move, even when looking down at the near-point lens, the field of view is limited to only the upper portion, making it extremely narrow. As a result, my eyes were becoming very tired.

This idea combines an eyeglass frame that moves up and down and a trifocal lens that has a circular intermediate-distance lens part and a near-point lens part, thereby achieving the same effect as that of well-known contact lenses. The purpose is to appear on glasses. Contact lenses are circular lenses with a diameter of around 10 mm, but they are not noticeable because they are worn close to the black eye and the lens diameter is small. Additionally, because the lens is located at the iris of the eye, the field of view for each eye is approximately 160 degrees, which is nearly as wide as the naked eye.

The glasses according to this invention combine a glasses frame that moves up and down and trifocal lenses each having a circular intermediate distance lens part and a near point lens part, and the glasses frame moves up and down according to changes in the line of sight. By this,
Although it has a small, inconspicuous intermediate-distance lens part and a near-point lens part, it is characterized by the ability to secure a wide field of vision like a contact lens. That is, when it is desired to use the near-point lens part, the eyeglass frame is raised by about 7 mm, so that the near-point lens part is positioned close to the iris of the eye, just like a contact lens. This allows a wide field of view to be secured with a small lens. In addition, since it is close to the black eye of the eye, a circular shape for the near-point lens is ideal in terms of securing the field of view, whereas a conventional rectangular shape with the top and bottom cut off or an inverted semi-cylindrical shape would be disadvantageous. Become.

This idea uses a trifocal lens with an eyeglass frame that can be moved up and down, and a circular intermediate distance lens section and a near point lens section, making the border lines less noticeable and comfortable to wear. The purpose is to provide eyeglasses that can be obtained.

Next, the configuration of this invention will be explained with reference to the drawings.

FIG. 1 is a perspective view showing one embodiment of this invention, and A indicates the main body of the glasses. The main body A is
Left and right lens frames 1, 1 and left and right lens frames 1, 1
It consists of an upper connecting piece 2 that connects the upper connecting piece 2 above the center, and a lower connecting piece 3 that connects the upper connecting piece 2 slightly below the upper connecting piece 2.

Lenses 4, 4 are fitted in the left and right lens frames 1, 1, respectively, and the lenses 4, 4 are attached to intermediate distance lens portions 6, 6 slightly below the center of the distance lens portions 5, 5. are integrally formed, and further, near-point lens portions 7, 7 are integrally formed adjacent to the intermediate distance lens portions 6, 6 and below the intermediate distance lens portions 6, 6. The intermediate distance lens parts 6, 6 and the near point lens parts 7, 7 are each circular, and the near point lens parts 7, 7 are slightly larger. The near point lens parts 7, 7 are formed in a positional relationship such that the near point lens parts 7, 7 are slightly closer to each other than the intermediate distance lens parts 6, 6 on the left and right sides. The closer you look, the closer your eyes are to the object, so this positional relationship was chosen.

Holding frames 8, 8 are attached to the inner sides of lens frames 1, 1, respectively, facing each other. Holding pieces 8, 8
They have a U-shaped cross section and are installed with the openings facing inward. A projecting piece is formed on the inside of each upper end of the holding pieces 8, 8, and stoppers 9, 9 are formed, respectively.
It is said that Although not shown in the drawings, a synthetic resin piece having a U-shaped cross section is fitted inside each of the holding pieces 8, 8. The synthetic resin piece is for better sliding.

Left and right straight portions 11, 11 of a sliding piece 10 formed by bending a single bar into a substantially U-shape are fitted into holding pieces 8, 8, respectively. In addition, sliding piece 1
0 gives a light elasticity toward the outside. While the sliding piece 10 is shrunk inward, the holding piece 8,
It is attached and detached by entering and exiting through the opening inside the 8. When installed, it is held by the holding pieces 8, 8 due to its elasticity, and moreover, it is designed to move up and down while sliding within the holding pieces 8, 8. The lower ends of the straight parts 11, 11 of the sliding piece 10 are each bulged outward, and nose pad pieces 12, 12 are attached to the lower ends, respectively. The upper ends of the nose pieces 12, 12 are respectively curved outward to form curved surfaces 13, 13.

Frame legs 1 are installed on the outside of each lens frame 1, 1.
The frame legs 14 and 14 are attached so that they can be folded inward and rotated in the vertical direction.The attachment mechanism of the frame legs 14 and 14 will be explained with reference to FIG.

As shown in FIG. 2, the front end of the support piece 15 is fixedly attached to the outside of the lens frame 1, and an arcuate stepped portion 16 is formed on the outer surface of the support piece 15. A hole 17 is made at the rear of the stepped portion 16, and a hole slightly larger than the hole 17 is also made at the rear of the hole 17 to serve as an adjustment hole 18. Further, a female threaded hole 19 is formed from above the support piece 15 and reaches the adjustment hole 18 . The female screw hole 19 is into which the adjustment screw 20 can be screwed.

A separate rotating piece 21 is prepared. The front end of the rotating piece 21 is formed into an arc shape. A hole 22 is formed near the front end of the rotating piece 21, and a pin 23 is screwed into the inner surface of the rotating piece 21 at a position slightly rearward of the hole 22.

When the arcuate front edge of the rotating piece 21 is brought into contact with the stepped portion 16 of the supporting piece 15, the hole 17 of the supporting piece 15 matches the hole 22 of the rotating piece 21, and the pin 23 of the rotating piece 21 aligns with the hole 22 of the rotating piece 21.
is fitted into the adjustment hole 18 of the support piece 15. Here, after fitting the receiving screw 24 into the hole 22 and fitting the washer 25 into the hole 17, screwing the male screw 26 into the receiving screw 24 from the hole 17 side means that the rotating piece 21 is attached to the supporting piece 15. The state shown in FIG. 3 is reached. Note that the frame leg 14 is attached to the rear end side of the rotating piece 21 so that it can be folded inward.

The rotating piece 21 and the frame leg 14 are installed so that they can rotate vertically around the receiving screw 24 and the male screw 26, but as shown in FIG. The pin 23 of the rotating piece 21 is limited by the range in which it can move up and down within the adjustment hole 18 of the support piece 15. If you want to narrow the upward rotation range of the rotating piece 21 or frame leg 14,
The adjustment screw 20 may be screwed into the female threaded hole 19 of the support piece 15, and its tip may be made to protrude within the adjustment hole 18. The rotation range is adjusted by adjusting the amount of protrusion.

The device shown above is used as shown in FIG.

First, in order to use the far lens parts 5, 5 in a normal state, as shown in FIG. It is worn with the nose pieces 12, 12 positioned upward. Nose piece 1 that touches both sides of the nose
2 and 12 are located above, the main body A is supported in a lowered state. Therefore, the line of sight is approximately at the center of the far lens sections 5, 5.
Then, in this state, if the user lowers his/her eyes a little, the user's line of sight comes to the center of the intermediate distance lens parts 6, 6, and the user can clearly see objects at an intermediate distance, such as the feet. Note that the near-point lens portions 7, 7 are at a lower position where they do not interfere.

Next, if you want to use the near-point lens parts 7, 7, tilt the main body A forward and lift the main body A at the same time.
Press No. 3 around the edge of the eyebrows. The nose pieces 12, 12 are pushed downward, the sliding piece 10 slides downward inside the holding pieces 8, 8, and stops at the position where the upper end of the sliding piece 10 hits the stoppers 9, 9. , the nose pieces 12, 12 are supported in a lowered state. When worn in this state, the main body A is supported while being lifted upward and slightly tilted forward, resulting in the state shown in FIG. 5B.

The near-point lens portions 7, 7 are slightly raised and closer to the center of the visual field, and further closer to the eyes.
Moreover, when using the near-point lens parts 7, 7, we often look at things at hand, and when we look at things at hand, our line of sight is directed downward, so the main body A is tilted slightly forward. The angle of inclination is almost perpendicular to the line of sight. Since the near-point lens parts 7, 7 are close to the center of the visual field and are substantially orthogonal to the line of sight, the eyes will not get tired even when used for a long time. Moreover, since it is close to the eyes, the field of view of the near-point lens parts 7, 7 is widened.

If you tilt your eyes slightly upward in this state, your line of sight will come to the center of the intermediate-distance lens parts 6, 6, and you will be able to see objects at an intermediate distance in front of you.

In addition, the island-shaped part shown with hatching near the root of the nose in FIG.
The contact surface is the contact surface that comes into contact with the nose pad pieces 12, 12 because the distance between the nose pad pieces 12, 12 remains the same whether the main body A is supported in the upper position or the lower position. will be in contact with the contact surface at the same position for the time being.

Next, to return the distance lens parts 5, 5 to the state in which they can be used, push the lower side of the main body A forward to align the support pieces 15, 15 and the frame legs 14, 14, and at the same time push the main body A. Push down the nose piece 12,
12 on both sides of the nose, the nose pieces 12,1
2 rises, and if you wear it in this state, it will be in the state shown in Figure 5A.

In addition, in order to accommodate the individual differences of the wearer, the main body A
As described above, the rotation range of the support pieces 15, 15 is adjusted by adjusting the screwing amount of the adjustment screws 20, 20 into the support pieces 15, 15.

In the above embodiment, the support piece 1
The adjustment screws 20 and 20 are screwed into the 5 and 15 sides, but on the contrary, the pins 2 and 2 are screwed into the support pieces 15 and 15.
3 and 23 are provided, and an adjustment hole 1 is provided on the rotating pieces 21 and 21 side.
8 and 18 may be opened and adjusting screws 20 and 20 may be screwed in. Instead of providing the pins 23, 23, a rotating piece 2 on the side facing the adjusting screws 20, 20 is provided.
1, 21 or support pieces 15, 15, rotation piece 21,
A portion may be provided to receive the tips of the adjustment screws 20, 20 screwed in when the screw 21 is rotated upward, and the shape, structure, etc. of that portion may be arbitrary.

Two adjusting screws 20 may be used on each side so that they are received when the rotating pieces 21, 21 are rotated upward and downward, or one adjusting screw 20 may be used on each side. It is also possible to use one by one and receive the rotation only when the rotating pieces 21, 21 are rotated upward or downward. On one side, screw in the adjusting screw 20 from above, and on the other side, screw in the adjusting screw 20 from below.
0 may be screwed in. An example of how to make fine adjustments using an adjustment screw is described in another application (Utility Model Application Publication No. 59-1999) filed by the applicant of this application.
It is also introduced in Publication No. 123828).

Further, in the embodiment shown above, the intermediate distance lens portions 6, 6 are replaced with the near point lens portions 7, 7.
Although the diameter is smaller, the two may be of approximately the same size. Furthermore, although the arrangement is shown in which the two are in contact with each other, it is also possible to arrange the two with a slight distance between them.

Although a sliding type mechanism for moving the nose pieces 12, 12 in the vertical direction is shown, another example of a mechanism for moving the nose pieces 12, 12 up and down while sliding is disclosed in Japanese Patent Laid-Open No. 58-27122. Publication, JP-A-59
It is also introduced in Publication No. 24824. Nose piece 12,
12 can be moved vertically while being rotated, but examples of rotatable types are disclosed in Japanese Patent Application Laid-Open No. 57-53725, Japanese Patent Application Laid-Open No. 57-173813,
It is also introduced in JP-A-58-27122, JP-A-58-93029, JP-A-59-24824, JP-A-57-98425, JP-A-58-26024, etc. .

In the glasses according to this invention, the inner sides of the pair of left and right lens frames 1, 1 are connected by a central connecting piece, and frame legs 14, 14 are attached to the outer sides of both lens frames 1, 1, respectively. Further, a moving mechanism is provided inside each of the lens frames 1, 1 to move the nose pieces 12, 12 in the vertical direction, and the nose pieces 12, 12 are attached via the moving mechanism. , circular intermediate distance lens portions 6, 6 are provided below the center of the distance lens portions 5, 5, and further, a circular near point lens portion 7, Lenses 4, 4 provided with 7 are fitted into both the lens frames 1, 1, respectively, and the following excellent effects are produced.

To see far away while wearing these glasses, you need 1 nose piece.
It is worn with 2 and 12 moved upward. Since both lens frames 1, 1 are supported in a lowered state and in a substantially vertical state, the lens frames 1, 1 are almost at the center of the field of view and the far lens parts 5, 5, and are at an angle almost perpendicular to the line of sight. .

In this state, you can comfortably see far away, but if you tend to lower your eyes a little, your line of sight will be directed downwards and come to the center of the intermediate distance lenses 6, 6, allowing you to see clearly at intermediate distances. It is becoming.

When it is desired to use the near-point lens parts 7, 7, the nose pieces 12, 12 are moved downward via the moving mechanism, and the lens frames 1, 1 are lifted upward and worn. The near-point lens parts 7, 7 are slightly raised and come closer to the center of the visual field. When the near point lens sections 7, 7 approach the center of the visual field, objects can be seen at the center of the near point lens sections 7, 7. Therefore, a wide field of view in the front and rear directions is ensured when reading, etc., and the eyes do not get tired even when used for a long time.

In addition, if you use your eyes upward in this state, your line of sight will be at the center of the intermediate distance lens parts 6, 6, and you will be able to see things at an intermediate distance in front of you.

As is clear from the above, in the device according to this invention, the lens frames 1, 1 can be moved up and down.
The intermediate distance lens sections 6, 6 and the near point lens sections 7, 7 can be arranged with their respective optical centers separated. Therefore, the intermediate distance lens section 6,
6 and the near-point lens portions 7, 7 can be made circular since a sufficient space can be obtained, so in the device according to this invention, they are made circular. Therefore, the boundaries between them are not noticeable and the appearance is extremely excellent.

Moreover, while moving the lens frames 1 and 1 up and down,
Since the lens part being used is brought forward in front of the line of sight so that objects can be seen from the center of the lens part, the user maintains a natural posture and avoids unnecessary rotation of the eyeball when using any lens part. I can see things without any trouble. Therefore, your eyes won't get tired.

[Brief explanation of drawings]

Fig. 1 is a perspective view showing one embodiment of this invention, Fig. 2 is an exploded perspective view of the main parts of the embodiment, Fig. 3 is an assembled view of the one shown in Fig. 2, and Fig. 4 is the main part of the embodiment. FIG. 5, a partially cutaway enlarged front view, is an explanatory diagram illustrating the operation of the embodiment. DESCRIPTION OF SYMBOLS 1... Lens frame, 2... Upper connecting piece, 3... Lower connecting piece, 4... Lens, 5... Lens part for distance, 6... Lens part for intermediate distance, 7... Lens part for near point. , 8... holding piece, 10... sliding piece, 12...
...Nose piece, 14...Frame leg, 15...Support piece, 21
...Rotating piece.

Claims (1)

[Scope of utility model registration request] The inner sides of the pair of left and right lens frames 1, 1 are connected by a central connecting piece, and frame legs 14, 14 are attached to the outer sides of both lens frames 1, 1, respectively. A moving mechanism is provided inside to move the nose pieces 12, 12 in the vertical direction, and the nose pieces 12, 12 are attached via the moving mechanism. A circular intermediate distance lens portion 6, 6 is provided below the center of the lens 4, 4, and a circular near point lens portion 7, 7 is provided below the intermediate distance lens portion 6, 6. Eyeglasses fitted into both the lens frames 1, 1, respectively.