JP2010102025A - Bifocal eyeglasses - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a bifocal eyeglasses provided with a bifocal lens that makes it possible to read a newspaper or magazine or write by directing a look downward and also makes it possible to look into a far distance by directing the look horizontally. <P>SOLUTION: Temples are attached to both sides of a bridge 2 via hinges so as to be foldable. A front 1 having the concavo-convex lens is attached to the front of the bridge 2 via recess and projection guides 10 and 11 that engage with each other. It is vertically movable along the recess and projection guides 10 and 11. In order to position the front 1 at a predetermined height, the leading end of a pin 13 provided for the projection guide 10 by applying a spring force thereto is fitted into a pin hole 12 formed in the guide 11. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to bifocal glasses that can be positioned so that the front portion moves up and down to match the line of sight.

  Perspective glasses are glasses that are fitted with a perspective lens that allows one to see both near and far. Accordingly, when reading a newspaper or magazine, the line of sight is directed downward, so that the lens has a convex lens part on the lower side and a concave lens part so that the middle is visible. That is, the convex lens portion and the concave lens portion are integrally formed on one lens.

  Therefore, when a near-sighted person becomes old and becomes presbyopic, it is not necessary to exchange glasses for near-sight and glasses for presbyopia by using the glasses fitted with the lenses for both perspective and near-sight. It is possible to live everyday life by always wearing the same glasses. However, a person who is not near-sighted may use a convex lens portion so that only the lower side can be seen without using a concave lens portion in the middle of the lens.

  By the way, in the case of this type of bifocal glasses, the lower region where the convex lens portion is formed so that a newspaper or magazine can be read is smaller than the middle concave lens portion region. There are various cases of looking close, such as when reading a magazine, writing a sentence, or operating a personal computer, but because the area of the convex lens is small, the line of sight often does not match depending on the content of the work.

  For this purpose, the front part of the glasses is moved up and down so that it can be easily seen. For example, when writing a sentence, the line of sight is directed to the lower side of the lens, particularly to face downward, but when viewing a screen by operating a personal computer, the line of sight is relatively directed to the center of the lens. In view of this, the front part is positioned downward, or conversely, it is positioned upward so that each work can be easily performed. However, even if the front part is moved up and down, the position thereof is not stable. Therefore, there are known perspective glasses for adjusting the position of the nose pad that supports the front part so as to move up and down.

For example, the “multifocal spectacle frame” disclosed in Japanese Patent Application Laid-Open No. 2005-10707 moves the spectacle frame up and down by raising and lowering the nose pad, and the lens used is appropriate regardless of which distance or near lens is used. This is a multifocal spectacle frame designed to have a height.
Therefore, holding pieces are attached to the inner sides of the left and right eyeglass frames, and each holding piece is provided with a recess and a magnet is embedded. The sliding piece has a portal shape, and left and right support bars are fitted in the recesses, respectively. Magnets are embedded in the upper ends.
The sliding piece which attaches the nose pad to the lower end of the spectacle frame is movable up and down. One magnet and the other magnet are attracted to each other, whereby the sliding piece can be held at a predetermined position.

  In the “multifocal spectacle frame” according to Japanese Patent Laid-Open No. 8-146356, a guide piece is provided in the vertical direction inside a spectacle frame fitted with a multifocal lens, and a slide piece is fitted to the guide piece. A support leg is attached so that the slide piece can be turned up and down, and a nose pad is attached to the tip of the support leg. When the slide piece is lifted and the support leg is rotated upward, the nose pad is in a far vision state. On the other hand, when the slide piece is lowered and the support leg is rotated downward, the near vision state is obtained.

Furthermore, the “multi-focus spectacle frame” according to Japanese Patent Publication No. 6-97313 is a spectacle frame for a plastic frame, and allows the nose pad member to be moved up and down.
“Multifocal spectacle frame” according to JP-A-2005-10707 "Multifocal spectacle frame" according to JP-A-8-146356 "Multi-focus eyeglass frame" according to Japanese Patent Publication No. 6-97313

  As described above, the position of the nose pad can be adjusted up and down to raise or lower the position of the front portion. The present invention provides bifocal glasses that have a completely different structure from that of the conventional system and that can be exchanged with the front part being detachable.

  The glasses for both perspective according to the present invention has a structure in which the front portion can be detachably attached. Therefore, there is a tear on the front side, and the front portion is attached to this tear. It is attached to both sides of the wading so that the crane can be folded via a joint, and two legs are paired and extended downward in the center of the wading, and a nose pad is attached to the tip of the leg. .

  A guide portion that meshes with each other is provided between the wading and the front portion. The guide portion is formed in the vertical direction, and the front portion is moved and positioned along the guide portion in the vertical direction. And the positioning means is provided so that the positioned front part may be held at a predetermined height. Here, the specific structure of the positioning means is not limited, but generally the spring force can be biased to prevent the front portion from being lowered.

  The front and rear glasses of the present invention can be fixed at a predetermined height by moving the front portion up and down. That is, the front part moves up and down along the guide part provided at the bottom, and by adjusting the position of the convex lens part provided on the lower side of the lens, it can be aligned with a line of sight suitable for work. For example, when writing a sentence, the front part is moved downward, and when operating a personal computer, the front part is positioned upward for easy viewing.

  Further, the front portion moves up and down along a guide provided in the wading, but can be removed from the wading. Accordingly, the front part can be used by exchanging with another front part. For example, you can attach a front part with a different design, and attach a front part fitted with a convex lens for presbyopia, or a front part fitted with a concave lens for near vision instead of a front part fitted with a lens for both perspective and near eyes. Can be attached. Furthermore, it is possible to attach sunglasses.

  FIG. 1 and FIG. 2 are embodiments showing the bifocal glasses according to the present invention, FIG. 1 is a plan view, and FIG. 2 is a front view and a side view, respectively. In the figure, reference numeral 1 denotes a front portion, 2 denotes a snail, 3 denotes a crane, and the front portion 1 is attached to the snail 2. The wading 2 is a member extending left and right along the front portion 1, and is bent rearward at both side ends to form the end portions 4 and 4. And it attaches to this armor part 4 and 4 via hinges 5 and 5 so that the vines 3 and 3 can be folded.

  Here, the joint means for connecting the temples 3 and 3 is not limited to the hinges 5 and 5 shown in FIG. Two legs 6 and 6 are extended downward at the center of the wading 2, and nose pads 7 and 7 are attached to the tips of the legs 6 and 6. The thus configured bifocal glasses can be put on the face in the same way as ordinary glasses by putting both nose pads 7 and 7 on both sides of the nose and putting the cranes 3 and 3 on the ears.

  By the way, the present invention is a bifocal eyeglass, and the bifocal lenses 9 and 9 are fitted to the rims 8 and 8 of the front portion 1. The perspective lens 9 has a concave lens portion and a convex lens portion formed continuously on a single lens, the convex lens portion is a lower part of the perspective lens 9, and most of the other is a concave lens portion. . Therefore, if the line of sight is horizontal, the distance can be seen through the concave lens part, and if the line of sight is directed downward, the distance can be seen through the convex lens part. That is, you can read newspapers and magazines and write sentences.

  By the way, the perspective glasses of the present invention has a structure in which the front portion 1 can be moved up and down to adjust its height. A convex guide portion extending in the vertical direction is provided on the front side of the wading 2, and a concave guide portion into which the convex guide portion is fitted is formed at the center of the rear side of the front portion 1. By fitting the convex guide portion of the wading 2 into the concave guide portion of the front portion 1, the front portion 1 is attached to the wading 2 and can move up and down along the convex guide portion.

  2A is a front view of the wading 2, and FIG. 2B is a front view of the front portion 1. A convex guide portion 10 is provided at the center of the front side of the wadding 2, and the rear side of the front portion 1. A concave guide portion 11 is formed at the center. A pin 13 urged by a spring force is attached to the center of the convex guide portion 10, and two pin holes 12 a and 12 b are provided at the bottom of the concave guide portion 11.

  FIG. 3 shows a plan view of the convex guide portion 10 and the concave guide portion 11. The convex guide portion 10 is provided with a hole, and a pin 13 and a coil spring 14 are fitted in the hole. The pin 13 is biased by the spring force of the coil spring 14 and the tip of the pin 13 slightly protrudes from the surface of the convex guide portion 10. (A) of the figure shows a state in which the pin 13 is retracted, and (b) shows a state in which the pin 13 is protruding.

  The side surface of the convex guide portion 10 is inclined so that the front side is inclined outward at an angle θ, and the side surface of the concave guide portion 11 is also inclined so that the bottom side is wide. Therefore, the front portion 1 is fitted with the convex guide portion 10 to the concave guide portion 11 from above the tail 2, and the concave portion 11 and the convex guide portion 10 are engaged with each other, so that the front portion 1 can be detached even when pulled to the front side. Absent.

  By the way, when the convex guide part 10 fits into the concave guide part 11, the tip of the pin 13 protruding from the surface moves backward, but protrudes by fitting into the pin hole 12 provided at the bottom of the concave guide part 11. Accordingly, when the tip of the pin is fitted into the pin hole 12, the front portion 1 is stabilized at that position (height). In the present embodiment, two pin holes 12a and 12b are provided on the bottom of the concave guide portion 11 so that the tip of the pin can be fitted into any of the pin holes 12a and 12b. You can change the position.

  FIGS. 5A and 5B show front views when the height position of the front portion 1 is changed. FIG. 5A shows a case where the front portion 1 is positioned below, and FIG. The case where the front part 1 is located upward is shown. Here, when changing the height position of the front portion 1, if the front portion 1 is pressed upward or downward, the tip of the pin 13 fitted in the pin hole 12 is compressed and retracted by compressing the coil spring 14. When it moves to the position of the pin hole 12, it can be reinserted into the pin hole 12.

  In FIG. 3, although two pin holes 12a and 12b are provided on the bottom of the concave guide portion, three pin holes may be provided, and the number of the pin holes 12 is not limited in the present invention. The method of determining the height position of the front portion 1 by biasing the spring force to the pin 13 and fitting the tip of the pin into the pin hole 12 is merely one specific example.

  By the way, the front 1 shown in the embodiment has both rims 8 and 8, and the front and rear lenses 9 and 9 are fitted to the rims 8 and 8. Not what you want. For example, the front portion 1 may be a front portion 1 having a half rim, in which the upper side of the bifocal lens 9 is fitted to the herb rim and the lower side is held by water thread. Alternatively, the front portion 1 having a structure in which the both-distance lens and the near-lens lens are directly screwed at the connecting portion, and the armor is screwed to the outside of the lens.

The top view of the glasses for both perspectives which concern on this invention. The front view and side view of the glasses for both perspectives which concern on this invention. (A) is a front view of a wading, (b) is a front view of a front part. The center part top view of a wading and a front part. (A) is the case where the front part is lowered, and (b) is the case where the front part is raised.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Front part 2 Watari 3 Tsuru 4 Yoroi part 5 Hinge 6 Leg 7 Nasal pad 8 Rim 9 Perspective lens
10 Convex guide
11 Concave guide
12 pin hole
13 pin
14 Coil spring

Claims (3)

In bifocal glasses equipped with a bifocal lens that can read newspapers and magazines with a line of sight downward, write text, and see the distance by leveling the line of sight, on both sides of the wading A vine can be folded via a joint, and a front portion having the above-mentioned bifocal lens is attached to the front of the wading. The front portion can be moved up and down along a guide provided on the wading. Bifocal glasses characterized by being able to be positioned easily. In bifocal glasses equipped with a bifocal lens that can read newspapers and magazines with a line of sight downward, write text, and see the distance by leveling the line of sight, on both sides of the wading Mount the vine so that it can be folded via a joint, and attach the front part with the above-mentioned bifocal lens to the front of the wading through the uneven guide part that meshes with each other, and move up and down along the uneven guide part A pair of glasses for both near and near, characterized in that the front end of the pin is provided with a spring force applied to the convex guide portion in order to position the front portion at a predetermined height, and is inserted into a pin hole formed in the concave guide portion. . The perspective glasses according to claim 2, wherein the convex guide portion is provided at the center of the front of the wading and the concave guide portion is formed at the center of the back surface of the front portion.

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