JPS6222131B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention allows the lens frame to be moved up and down and at the same time to change the tilt angle with a simple operation while the lens frame is being worn, so that the glasses can always be worn regardless of which lens part is used. This invention relates to a multifocal eyeglass frame that can be worn correctly.

In terms of eye physiology, the correct glasses are said to meet the following four conditions.

The optical centers of the left and right lenses must match the pupils of the left and right eyes in the horizontal direction.

The optical centers of the left and right lenses must match the pupils of the left and right eyes, even in the vertical direction.The inclination angle of the lenses must be the optimal one for each purpose (approximately Ten
For near vision, the tilt angle is between 15 degrees and 20 degrees.
The distance between the back surface of the lens and the corneal apex is approximately 12
Ready-made reading glasses that do not meet the above four conditions are considered medically unacceptable, and therefore, although they are cheap, they are not widely used.

By the way, until now, multifocal glasses fitted with multifocal lenses, including bifocal lenses,
They have been widely used as they are more convenient than regular reading glasses. However, in these conventional lenses, the lens frame cannot be moved up and down, so although it is possible to satisfy the above conditions depending on the lens part used, it is difficult to use other lens parts. If the glasses are not correct and cannot meet the other conditions.

In order to partially eliminate these shortcomings,
For example, bifocal glasses as shown in Japanese Utility Model Publication No. 55-2404 were devised. This device moves the lens frame up and down by sliding the nose piece, bringing the optical center of the distance lens closer to the pupil level for distance vision, and for near vision. The optical center of the near-point lens portion is brought closer to the height of the pupil. However, this one also had the following drawbacks. In other words, it has not been commercialized because of the inability to create the correct angle of the glasses, the inability to create the correct distance between the corneal vertices, and the glasses slipping down (the reasons will be explained later).

In this device, a pair of left and right lens frames are connected by a central connecting piece, support pieces are attached to the insides of both lens frames, and furthermore, a pair of left and right lens frames is attached to the inside of each lens frame, and furthermore, the left and right straight parts extending vertically and the straight parts Both linear parts of the sliding frame, which is made up of a connecting part that connects the upper part, are each supported by the supporting pieces, so that the sliding frame is supported in a vertically movable manner. A nosepiece piece is attached to the lower end of both straight parts, respectively. The upper ends of both supporting pieces are bent at right angles to form hooking parts.

When the sliding frame is lowered, the upper end of the sliding frame is hooked to these hooking portions to prevent the sliding frame from rising. When worn in this state, the lens frame is lifted due to the nose piece being in the lowered position, and the optical center of the near point lens portion approaches the level of the pupil. If you want to use the distance lens, move the lens frame slightly forward while in this state. The upper end of the sliding frame comes off the hook of the support piece, the sliding frame rises relative to the lens frame, and the vicinity of the lower end of the sliding frame hits the lower end of the support piece, preventing it from rising any further. be done. In this state, the lens frame is lowered, and the optical center of the far lens portion is approaching the position of the pupil. To raise the lens frame again, just lift the lens frame slightly. The sliding frame etc. descends due to its own weight, and if the lens frame is attached at that time, the upper end of the sliding frame is latched to the latching portion again as the face pushes the nose piece.

However, this idea has not been put into practice because it has various drawbacks as described below and is not practical. First, the operation of lowering the sliding frame and latching it to the latching portion is extremely difficult, and it is difficult to imagine that anyone can easily do this without making mistakes. In other words, even if the nose piece is pressed against the user's face when the sliding frame reaches its lowest point, there is no fulcrum on the sliding frame, so a force is generated that causes the upper end of the sliding frame to rotate toward the user's side. Not exclusively. For this reason, the upper end of the sliding frame does not always catch on the hook portion. As long as it is not something that will definitely catch people's attention, it is difficult to establish it as a product.

Even if the sliding frame is successfully latched to the latching part, it is difficult to maintain the latched state stably.
It's very difficult. While wearing glasses, the face constantly moves or the glasses have fallen off and must be picked up again. There is a risk that the sliding frame will come off the hook each time. It would be possible to devise a way to make it difficult for it to come off the hook, but if you do that, it will be difficult to hook it again.

Furthermore, the stability is not good when the sliding frame is lifted up for distant viewing. Since the eyeglass frame and nose piece are not integrated, the nose piece becomes loose every time the face moves or the glasses are put on. For this reason, it is not possible to obtain a comfortable wearing feeling.

If the play between the support piece and the sliding frame is eliminated, it may be possible to prevent wobbling in directions other than the vertical direction. However, in such a case, it becomes impossible to smoothly move the sliding frame up and down. In any case, if it gets clogged with dirt, it will stop moving up and down, so it is necessary to allow a considerable amount of play between the two. For this reason, the lens becomes quite loose in both distance vision and near vision, making it difficult to feel comfortable when wearing it.

Furthermore, it also has drawbacks as shown in FIG. In other words, when the nose piece is raised and the main body is supported in a lowered state in order to see far in a normal state while using the lens for distance, the 6th
The state shown by the solid line in the figure is such that the line of sight and the lens are almost orthogonal, and the correct lens angle for far vision is maintained at about 10 degrees. When the nose piece is lowered to support the lens frame in a lifted state in order to see what is near you while using the lens, the situation will be as shown by the imaginary line in FIG. 6. In other words, compared to when using the distance lens part, the main body is tilted slightly upward, making it difficult to adjust the correct lens angle for near vision (approximately 15
This is contrary to the meaning of maintaining a temperature of 20 degrees to 20 degrees. For this reason, the line of sight and the lens become diagonal,
It causes eye fatigue.

In this case, when the near-point lens section is used, its inclination angle is not optimal. Therefore, the above conditions cannot be met.

Furthermore, since the near-point lens section is moved away from the eye during use, the above conditions cannot be met.

In short, these glasses not only have drawbacks such as being troublesome to operate, uncertain in their operation, and are uncomfortable to wear, but also do not meet the requirements for proper glasses.

By the way, Japanese Unexamined Patent Publication No. 56-4118 discloses a lens frame in which the inclination angle of the lens frame can be changed.
What is described is that which attempts to satisfy the above conditions. In this case, the front ends of supports are attached to the outside of each pair of left and right lens frames, and frame legs are attached to each of the supports so that they can rotate vertically toward the rear. It is something. This product simply satisfies the above conditions by allowing the lens frame to be used with the lens frame upright for distance vision, and slightly tilted forward for near vision. It's just something you do. This does not use a multifocal lens, nor does it allow the lens frame to move up and down. When tilting the lens frame, there is no means to restrict the range of rotation on the frame side, so every time you change the tilt angle of the lens frame, extreme care must be taken to obtain the appropriate tilt angle. There is a need. It's hard to use your nerves every time. Even if they are careful, it is difficult to imagine that ordinary users who do not necessarily have sufficient knowledge of how to use glasses will always be able to achieve the correct tilt angle.

Now, among the above four conditions for proper glasses, condition 1 can be satisfied if the optician selects the lenses, cut, and lens frame that are optimal for the wearer. Therefore, the present invention can satisfy the remaining three conditions regardless of which lens part is used while using a multifocal lens. The purpose of the present invention is to provide a multifocal eyeglass frame. That is, the present invention enables the lens frame to be moved up and down and the frame legs to be bent by simple operations while the lens is being worn, and at the same time allows the lens frame to be moved up and down and at the same time to adjust the angle. To provide a multifocal eyeglass frame which can be used in an optically ideal state no matter which lens part is used by changing the lens part.

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

FIG. 1 is a perspective view showing 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 includes the left and right lenses 1, 1.
It consists of left and right lens frames 2, 2 in which the lenses 1, 1 are fitted, respectively, and a central connecting piece 3 that connects the left and right lens frames 2, 2 slightly above the center.
The lenses 1, 1 are bifocal lenses in which near-point lens parts 5, 5 are integrally formed slightly below the distance lens parts 4, 4. The parts shown above are
This is the structure of conventionally known bifocal glasses.

Slightly below the central connecting piece 3, the lens frame 2,
Support pieces 6, 6 are fixedly attached to the inside of each of the parts 2 while facing each other. A sliding frame 9 is formed by bending one elastic round rod into a substantially U-shape to form a connecting portion 8 that connects the left and right straight portions 7, 7 and the upper ends of the straight portions 7, 7. , its straight part 7,7
supporting pieces 6 fixed to the lens frames 2, 2, respectively;
It is set to 6. When moving the sliding frame 9 up and down, the support pieces 6, 6 guide the straight parts 7, 7.

The lower end portions of the straight portions 7, 7 are respectively bulged outward to form adjustment portions 10, 10. At the lower ends of the adjustment parts 10, 10, nose pieces 11,
11 is fixed and installed. Adjustment parts 10, 10
The nose pieces 11, 11 are fitted according to the shape of the wearer's nose.
This is provided to adjust the position of the Although it is not so obvious from the drawing, each of the straight portions 7, 7 is formed with a slightly wider portion toward the outside. The purpose of this is that when the sliding frame 9 is moved up and down, some resistance is generated when the straight parts 7, 7 pass through the support pieces 6, 6, and after passing, they are stably locked in the upper or lower position. We are making it possible to do so.

A frame leg 12 is provided on each outer side of the lens frames 2, 2, respectively.
12 is installed. The frame legs 12, 12 can be folded inward and rotated downwards like the conventional ones, but a mechanism that allows them to rotate inwardly and downwardly has been added. This will be explained with reference to FIGS. 2, 3, and 4. Second
The figure is an exploded perspective view of a portion of the rotation mechanism. The front end of the support 13 is fixedly attached to the outside of the lens frame 2, and the rear end of the support 13 is shaped like an arc and has a hole 14 in the vicinity of the end. The inner surface of the support 13 has two U-shaped holes 1.
A receiving piece 16 with openings 5 and 15 is attached by brazing. At this time, the hole 14 of the support body 13 and the holes 15, 15 of the receiving piece 16 are aligned. A separate connecting piece 17 is prepared, and the front end edge of the connecting piece 17 is formed into a U-shape to form an upper abutting surface 18 and a lower abutting surface 19. A hole 20 is formed close to the front end edge, and two ring-shaped bodies 21, 21 are formed at the rear end side with a slight interval in the vertical direction. The inner surface of the lower ring-shaped body 21 is internally threaded. Then, connect the connecting piece 17 to the receiving piece 1.
6 and the holes 15, 15 of the receiving piece 16 and the connecting piece 17.
After aligning the holes 20 with the holes 20, fit the receiving screw 22 with a female thread on the inside into the hole 15 of the receiving piece 16, fit the male thread 23 from the hole 14 side of the support body 13, and screw it into the receiving screw 22. Tighten. Receiving screw 22
The male screw 23 also functions as a rotation shaft. A separate rotating piece 24 is prepared, and a ring-shaped body 25 is formed at one end of the rotating piece 24. and,
The rotating piece 24 is attached near one end of the frame leg 12 by brazing. After fitting the ring-shaped body 25 of the rotating piece 24 between the ring-shaped bodies 21, 21 of the connecting piece 17, the screw 26 is passed through the upper ring-shaped body 21 and the ring-shaped body 25 of the rotating piece 24, and then the lower ring-shaped body 25 of the rotating piece 24 is inserted. When it is screwed into the ring-shaped body 21 and tightened, the assembly is completed and the state shown in FIG. 3 is obtained. Note that the front edge of the frame leg 12 is recessed in an arc shape so that it follows the arc-shaped rear edge of the support body 13, but after assembly, the rear edge of the support body 13 The edge and the front edge of the frame leg 12 fit together in a tight fit.

As is clear from Fig. 3, the frame leg 12
The ring-shaped bodies 21, 21 of the connecting piece 17 and the rotating piece 2
It is designed so that it can be rotated about a screw 26 tightened between it and a ring-shaped body 25 of No. 4 as a fulcrum and folded inward. When the frame legs 12 are rotated outward, the front edge of the frame legs 12 comes into contact with the rear edge of the support 13 and stops.

Further, the frame leg 12 can also rotate in the vertical direction using a receiving screw 22 and a male screw 23 screwed between the receiving piece 16 and the connecting piece 17 as a fulcrum.
As is clear from FIG. 4, when the frame leg 12 is rotated upward, the upper contact surface 18 of the connecting piece 17 stops against the receiving piece 16, and the frame leg 12 is rotated downward. When the lower contact surface 19 of the connecting piece 17
is adapted to stop when it hits the receiving piece 16.

In addition, by rotating the frame legs 12 upward or downward,
Appropriate frictional force is required to ensure stable locking when folded inward or unfolded. This frictional force can be obtained by the tightening force of the male thread 23 and the screw 26, but the
3 and the screw 26, the more the U-shaped part of the receiving piece 16 and both ring-shaped parts 2 of the connecting piece 17 tighten.
Since the frictional force becomes stronger as the distance between 1 and 21 becomes smaller, the frictional force can be adjusted by adjusting their tightening force.

The above-mentioned device is used as shown in FIG.

First, when viewing far away in normal conditions while using the far distance lens parts 4, 4, as shown in FIG. Lens parts 4, 4 and frame legs 12, 1
2 are almost perpendicular to each other, and nose piece 1
1 and 11 are placed upwards. FIG. 5 is a somewhat schematic partial cross-sectional side view showing the state of use, and the island-shaped parts shown with hatching near the root of the nose are the nose pad pieces 11, 1.
1 is the abutment surface that comes into contact with it, and in the state shown in FIG. has been done.

At this time, the adjustment parts 10, 10 at the lower end of the sliding frame 9
is in contact with the lower end of the support pieces 6, 6, and the sliding frame 9
This prevents the nose pieces 11, 11 from rising. Further, the upper contact surfaces 18, 18 of the connecting pieces 17, 17 are in contact with the receiving pieces 16, 16, and the frame legs 12, 12
This prevents any further upward rotation. As is clear from the above, when raising the nose pieces 11, 11, it is only necessary to raise them as far as possible. Once the temperature has been raised completely, the state can be stably maintained. Also, frame leg 1
When rotating 2 and 12 upward, it is sufficient to simply rotate them to the point where they can be rotated upward. After the rotation is complete, the connecting pieces 17, 17 and the receiving piece 16,
This state can be stably maintained due to the frictional force generated between it and 16. Therefore, the nose pieces 11, 11 are raised and the frame legs 12, 12 are lifted.
The operation of rotating upward can be done casually without using any nerves.

In the wearing state shown in FIG. The lens portions 4, 4 are substantially orthogonal to each other.

In this wearing condition, the near point lens portion 5,
5 is located at a lower position where it does not get in the way, eliminating the negative effects of worrying about the border between the far-distance lens parts 4, 4 and the near-point lens parts 5, 5, and making the feet blurry, making it comfortable. You can feel comfortable wearing it.

Next, when reading or looking at something at hand, hold the main body A and apply force to tilt the main body A forward while pulling the lower side of the main body A backward. The main body A is bent around the receiving screws 22, 22 and the male screws 23, 23 with respect to the frame legs 12, 12, and the main body A is slightly tilted forward. At this time, the lower contact surfaces 19, 19 of the connecting pieces 17, 17 are in contact with the receiving pieces 16, 16. At the same time, lift main body A and insert nose piece 1.
When the upper ends of 1 and 11 are pressed against the edge of the eyebrows, the nose pieces 11 and 11 are pushed downward and the sliding frame 9 slides downward within the handheld pieces 6 and 6. When worn in this state, the main body A is supported in a slightly upwardly lifted state and slightly tilted forward, resulting in the state shown in FIG. 5B.

At this time, the wide portions of the straight portions 7, 7 of the sliding frame 9 are located below the support pieces 6, 6, and prevent the sliding frame 9 and nose pieces 11, 11 from rising. Also,
Lower contact surfaces 19, 19 of the connecting pieces 17, 17 abut against the receiving pieces 16, 16, and prevent further downward rotation of the frame legs 12, 12. and,
As is clear from the above, when lowering the nose pieces 11, 11, it is only necessary to lower them as far as they can go. After descending completely, the state can be stably maintained. Also, frame leg 1
When rotating 2 and 12 downward, it is sufficient to rotate them as far as possible. After the rotation is complete, the connecting pieces 17, 17 and the receiving piece 16,
This state can be stably maintained due to the frictional force generated between it and 16. Therefore, the operation for moving from the state shown in FIG. 5A to the state shown in FIG. 5B can be carried out casually and without using any nerves.

At this time, the main body A is lifted by an amount corresponding to the amount by which the nose pieces 11, 11 are lowered. That is, in addition to the fact that the main body A side and the frame legs 12, 12 are bent, the nose pieces 11, 11 are lowered, so that the distance between the nose pieces 11, 11 and both ears is reduced. Because it became slightly shorter, the nose piece was changed to 11.1.
1 comes into contact with both sides of the nose at a slightly higher position than in the state shown in FIG. 5A. The main body A is lifted by a height corresponding to the sum of the amount of descent of the nose pieces 11, 11 and the amount of rise of the contact surface.

The near-point lens portions 5, 5 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 5, 5, 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 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 substantially orthogonal to the line of sight, the eyes will not get tired even when used for a long time. In addition, since it is close to the eyes, the field of view of the near-point lens parts 5, 5 is widened.

To return the distance lens parts 4, 4 to a state where they can be used again, push the lower side of the main body A forward to align the supports 13, 13 and the frame legs 12, 12, and at the same time push the main body A. When the nose pieces 11, 11 are pushed down and pressed against both sides of the nose, the nose pieces 11, 11 will rise, and when worn in this state, they will be in the state shown in FIG. 5A.

Although the embodiments using bifocal lenses have been shown above, it goes without saying that the multifocal eyeglass frame according to the present invention can be used with progressive multifocal lenses and other multifocal lenses with three or more focal points. do not have.

Further, the present invention has the following excellent effects. First, the multifocal eyeglass frame according to the present invention is easy to operate. In other words, in the case of far vision, both lens frames 2,
2, the frame legs 12, 12 are rotated upward until they stop. When the rotation range regulating means provided between the supports 13, 13 attached to both lens frames 2, 2 and the connecting pieces 17, 17 attached to the tips of the frame legs 12, 12 is activated, Rotation stops. Supports 13, 13 side and connecting pieces 17, 17
Since the frame legs 12, 12 are brought into pressure contact with each other by generating a light frictional force on the contact surfaces while having surfaces in contact with the sides, the frame legs 12, 12 stably maintain their stopped positions. At the same time, the lens frames 2, 2 are pushed down to press the nose pieces 11, 11 against both sides of the nose, and the nose pieces 11, 11 are raised against the lens frames 2, 2 until they stop. The sliding frame 9 rises while being guided along both linear parts 7, 7 by support pieces 6, 6 attached to the inner sides of the lens frames 2, 2, respectively. When the sliding frame 9 reaches its full height, it stably maintains its position due to its elasticity and the fact that both sides of the nose push up the nose pieces 11, 11.

In the case of near vision, the frame legs 12, 12 are rotated downward until they stop while still being worn. The rotation stops when the rotation range regulating means is activated, and this state is maintained stably by the same frictional force. At the same time, lift the lens frames 2, 2,
Press the upper end of the nose piece 11, 11 against the edge of the eyebrows, and then press the nose piece 11, 11 until it stops.
Press down on 11. When it stops, both support pieces 6, 6 formed on both straight parts 7, 7 of the sliding frame 9
A portion that is slightly wider than the spacing between the two supporting portions passes through the supporting pieces 6, 6, and is wider than the spacing due to the elasticity of the sliding frame 9. As a result, the sliding frame 9 is prevented from rising, and this state can be stably maintained.

In short, the operation is simple, as the frame legs 12, 12 are simply rotated up and down until they stop, and at the same time, the nose pieces 11, 11 are moved up and down until they are stopped. The stability in each state is extremely good.

The multifocal eyeglass frame according to the present invention can satisfy the four conditions for proper eyeglasses even though it uses a multifocal lens. That is, the above conditions can be satisfied by the technology of the optician, but the remaining three conditions are satisfied as follows. First, when viewing far away, the frame legs 12, 12 are immediately extended for both lens frames 2, 2, and the nose pieces 11, 11 are placed in a raised state, and then worn. At this time, the lens is at an appropriate height, an appropriate inclination angle, and an appropriate distance from the corneal vertex. Next, in the case of near vision, frame legs 12, 12 are attached to both lens frames 2, 2.
The user rotates the nose piece 11 downward to lower the nose pieces 11, and wear the nose piece. At this time, the lens
It is slightly raised to an appropriate height, tilted slightly forward to an appropriate inclination angle, and furthermore, the distance from the corneal apex is appropriate.

In short, the device according to the present invention allows each ideal state to be easily created for both far vision and near vision through simple operations.

[Brief explanation of the drawing]

Fig. 1 is a perspective view showing one embodiment of the present invention, Fig. 2 is an exploded perspective view of the main parts of the embodiment, Fig. 3 is a perspective view showing the assembled state of the device shown in Fig. 2, and Fig. 4 is FIG. 3 is a partially sectional front view of the device, FIG. 5 is an explanatory view for explaining the operation of the embodiment, and FIG. 6 is a somewhat schematic side view showing the conventional example in use. 2...Lens frame, 3...Central connection piece, 6...Support piece, 7...Straight line part, 8...Connection part, 9...Sliding frame, 10...Adjustment part, 11...Nose pad piece , 12...
Frame leg, 13... support body, 17... connection piece.

Claims (1)

[Claims] 1 Left and right 1 where multifocal lenses are fitted respectively
The inner sides of the pair of lens frames 2, 2 are connected by a central connecting piece 3, and the front end sides of supports 13, 13 are attached to the outer sides of both lens frames 2, 2, respectively. The connecting pieces 17 are each provided with a rotating mechanism that can rotate the connecting pieces 17 in the vertical direction, and the connecting pieces 1 are connected through the rotating mechanisms.
7 and 17 are respectively attached, and the frame legs 12 and 12 are connected to the rear of the connecting pieces 17 and 17, respectively, facing backward, and the supporting bodies 13 and 13 are connected to the connecting piece 1.
A rotation range regulating means is provided between the frame legs 12 and 17 sides so that the frame legs 12 and 12 can rotate between a substantially horizontal position and a slightly downwardly rotated position. 13, 13 side and connecting piece 17, 1
A light frictional force is generated on the contact surface between the lens frames 2 and 7 to press them together, and support pieces 6, 6 are attached to the inside of both lens frames 2, 2, respectively, and Left and right straight parts 7, 7 extending to
and a connecting portion 8 connecting the upper portions of both straight portions 7, 7, and a sliding frame 9 having elasticity as a whole, with both straight portions 7, 7 being supported by the supporting pieces 6, 6, respectively. The sliding frame 9 is supported in a vertically movable manner, and the linear portions 7, 7 are formed with portions that are slightly wider than the spacing between the supporting portions of the supporting pieces 6, 6. A multifocal eyeglass frame in which nose pieces 11, 11 are attached to the lower end sides of straight parts 7, 7 via adjustment parts 10, 10, respectively.