JPH112701A - Diopter adjustment spectacles - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide the spectacles which can have its diopter adjusted manually or automatically while put on. SOLUTION: This spectacles are equipped with lenses 100 where constituting the space, formed of a transparent thin film or flexible transparent plate or by combining a transparent plate with them, is filled with transparent liquid and a mechanism 200 which injects and sucks the liquid and the lengths of the lenses 100 are varied by varying the curvature of the transparent thin film or flexible transparent plate with the pressure of the liquid, thus making diopter adjustments.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to spectacles whose diopter can be adjusted while being worn.

[0002]

2. Description of the Related Art Conventional spectacles use a single focus or a multifocal lens having a different focal length depending on the location.

[0003]

With conventional glasses, a wearer whose focus adjustment range is narrow, such as presbyopia, needs to change his / her glasses from a distance to an observation object or to tilt his / her line of sight unnaturally.

[0004]

SUMMARY OF THE INVENTION The present invention provides eyeglasses that adjust the diopter automatically by detecting the distance of an object to be viewed manually or in a state where the eyeglasses are worn. It is to try to eliminate it.

[0005]

BEST MODE FOR CARRYING OUT THE INVENTION According to the present invention, one flexible transparent plate or transparent film, a transparent plate or film are arranged in parallel with a gap, and a transparent liquid is injected into the gap to form a lens. Form. Further, by providing the pressure adjusting means for the transparent liquid, the flexible transparent plate or the transparent film is curved to change the focal length of the lens, thereby adjusting the diopter.

[0006]

1 to 4 show a first embodiment of the present invention. In FIG. 1, 100 is a spectacle lens with a diopter adjusting mechanism, 200 is a diopter adjusting device, and 300 is a spectacle frame. FIG. 2 is a cross-sectional view of the lens 100 with a diopter adjusting mechanism. The transparent film 120 is spaced apart from the glass disk 110, and the cylindrical spacer 130 forms a space 140 between the glass disk and the transparent film. Consists of Further, a tube 170 is attached to the spacer portion, and is connected to the diopter adjustment mechanism 200 via the tube. Diopter adjustment device 2
00 has a mechanism equivalent to that of a syringe, and transfers a liquid filled between a cylinder 201 and a piston 202 to a tube 170.
The space 140 and the tube 170, and the space between the cylinder and the piston are filled with a transparent liquid. 3 and 4 are cross-sectional views for explaining the focal length adjusting operation of the lens of FIG. In FIG. 3, when a transparent liquid is injected into the space 140 from the diopter adjusting device 200, the pressure in the space is increased, and the transparent film 120 is extruded to form a spherical convex surface. Therefore, the transparent liquid 150 existing between the convex surface and the transparent disk functions as a convex lens. The curvature of the convex surface of the convex lens changes due to the pressure of the transparent liquid injected into the space 140, thereby changing the focal length of the lens, so that the diopter as a spectacle lens also changes. Also, if the transparent liquid 150 injected into the space 140 is sucked out by the piston 202, the transparent film 120 is pressed by the atmospheric pressure and becomes concave as shown in FIG. 4, so that the transparent liquid 150 functions as a concave lens. . Thus, according to the diopter adjustment mechanism of the present invention,
By adjusting the piston 201, it is possible to provide a lens whose focal length can be adjusted widely from a convex lens to a concave lens. Further, in this embodiment, since the front surface of the transparent film is covered with the lens 160, the transparent film can be protected. In addition, the basic diopter adjustments such as hyperopia, myopia, and astigmatism can be performed with this lens, and if a single diopter adjustment mechanism is prepared, it can be applied to people with various vision conditions. There is also. FIG. 5 shows another structure of a lens with a diopter adjusting mechanism. In this structure, moldable dish disks 111 and 121 are used instead of a transparent film, and at least one of them is flexible. It is characterized by being made of materials. By using the lens having the structure shown in this drawing, a spectacle lens with a diopter adjusting mechanism having a cross section similar to that of a normal spectacle lens can be provided. According to this structure, when the liquid is injected into the space 140, the pressure causes the transparent flexible disk 121 disposed on the convex surface to increase the curvature of the curved surface, as shown in FIG. Since the curvature of the flexible disk 111 is reduced,
A convex lens is formed by the surface and the liquid injected into the space 140. Conversely, when sucked, it becomes a concave lens. Further, the focal length of the lens can be continuously changed by adjusting the pressure. FIG. 7 is a diagram showing a second embodiment of the present invention. Reference numerals 201 to 240 denote a liquid injection mechanism, in which the liquid is injected into the lens 100 through the tube 170 by pressing the transparent liquid 150 in the cylinder 201 with the piston 202. The piston 202 is provided with a knob 240
The liquid 150 is moved in the injection / suction direction by the screw mechanism 230 by turning. FIG. 8 is a diagram showing a third embodiment of the present invention. This embodiment is characterized in that a pendulum 250, which is rotatably fixed at a fulcrum 232, is connected to a piston 220 via a link mechanism 231. In this embodiment, the inclination of the face wearing glasses is detected by a pendulum, and the diopter is automatically adjusted by moving the piston 220 according to the inclination. That is, when the face faces downward, the vine 310 of the glasses worn also tilts downward, while the pendulum 25
Since 0 is always in the vertical direction due to gravity, the piston 220 is pushed forward and the liquid 150 in the cylinder is injected into the lens 100, so that the lens 100 is deformed to the convex lens side. In general, when looking down, the object is often close, and in this case, the lens is deformed in the convex direction, and the focal length combined with the eyeball lens is short, so that the close-up is easy to see. FIG. 9 is a diagram showing a fourth embodiment of the present invention. In FIG. 9, 420 is an inclination sensor for detecting the inclination of the glasses, 410 is an actuator for driving the piston 202, and 430 is a control circuit for controlling the driving amount of the actuator based on the signal of the inclination sensor. In this embodiment, by changing the characteristics of the control circuit, it is possible to perform control suitable for the use conditions of the glasses. Further, a distance sensor may be used instead of the inclination sensor 420. Furthermore, it is needless to say that the variable focal length lens of the present invention is not limited to a lens for spectacles, but can be generally applied to a lens system of an optical device for performing focus adjustment. Further, the transparent liquid injection mechanism is not limited to the piston and the cylinder, and it goes without saying that another liquid injection / suction mechanism such as crushing a flexible sealed container may be used.

[0007]

According to the glasses of the present invention, since the focal length of the entire lens changes, the angle of the line of sight is changed depending on the distance of the object, as in a conventional multifocal lens, or a plurality of single-focus lenses are changed. You can see nearby objects from a distance without having to wait. In addition, by combining a tilt sensor or a distance sensor with a pressure adjusting mechanism, it is possible to provide glasses that can automatically adjust diopter in accordance with the distance of an object.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a first embodiment of the present invention.

FIG. 2 is a cross-sectional view of the lens of the present invention.

FIG. 3 is a sectional view showing an operating state of the lens of the present invention as a convex lens.

FIG. 4 is a sectional view showing an operating state of the lens of the present invention as a concave lens.

FIG. 5 shows a lens of another mechanism of the present invention.

FIG. 6 is a sectional view showing an operation state of a lens of another mechanism of the present invention as a convex lens.

FIG. 7 is a side view showing a second embodiment of the present invention.

FIG. 8 is a side view showing a third embodiment of the present invention.

[Explanation of symbols]

100 Lens with diopter adjustment mechanism 110 Transparent plate
Reference Signs List 120 transparent thin film 150 transparent liquid 170 tube 200 pressure adjusting mechanism 250 pendulum 300 spectacle frame 410 actuator 420 tilt sensor 430 control circuit

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[Procedure amendment]

[Submission date] September 16, 1997

[Procedure amendment 2]

[Document name to be amended] Statement

[Correction target item name] Fig. 9

[Correction method] Added

[Correction contents]

FIG. 9 is a side view showing a fourth embodiment of the present invention.

Claims (4)

[Claims] 1. A transparent liquid is sucked by a transparent thin film or a flexible transparent plate arranged substantially in parallel, or a lens filled with a transparent liquid in a gap formed by the transparent plate and the transparent thin film or the flexible transparent plate. A lens having a mechanism for adjusting the pressure in the gap by injecting the liquid and adjusting the curvature of the transparent thin film or the flexible transparent plate by the pressure of the liquid to change the focal length. 2. A pair of eyeglasses according to claim 1, wherein the diopter is adjusted by using the lens. 3. The lens according to claim 1, wherein a transparent thin film or a flexible transparent plate side of the lens is covered with a hard transparent plate or a hard lens for adjusting the approximate diopter. The eyeglasses according to claim 2, wherein 4. A mechanism for detecting the distance of an object, such as a tilt sensor or a distance sensor, and automatically adjusting a transparent liquid injection amount so as to always obtain an optimum diopter using the information. The spectacles according to claim 2 and claim 3 provided with the spectacles.