JPH0619702U - Simple measuring device for visual acuity - Google Patents

Abstract

(57) [Summary] [Purpose] When purchasing glasses for presbyopia or hyperopia, to enable easy measurement of the diopter of vision. [Structure] A pair of viewing windows 4 is provided at an upper end portion of a square tube portion 2 of a case 1, and a lens connecting body 7 in which lenses 8 having different frequencies are arranged on both sides in the square tube portion 2 is viewed by one lens 8 each. The lens 8 is movably arranged so as to face the inside of the window 4, and the lens 8 is sequentially moved while watching the reading member 5 through the lens 8 from the peep window 4, and the diopter of the visual acuity is determined by the lens power at which the reading member 5 is most clearly seen. I can know.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a simple measuring device for measuring the power of visual acuity when selecting glasses for presbyopia or hyperopia.

[0002]

[Prior art]

 When purchasing glasses for presbyopia or hyperopia, it is necessary to select a lens with a power corresponding to the eyesight.

[0003] Conventionally, in a spectacles store, in order to select a lens according to the visual acuity of a presbyopia or a farsighted person, a plurality of glasses having lenses with different dioptric powers are prepared, and the person to be measured turns each eyeglass in order. While wearing it on, I read the letters, etc., and decided by choosing the lens of the glasses that would be most visible.

[0004]

[Problems to be solved by the device]

 However, in the conventional visual acuity measurement as described above, a plurality of glasses are required, and the person to be measured must repeatedly put on and take off the glasses, which causes a problem that the measurement work is troublesome.

Therefore, an object of the present invention is to provide a simple measuring device capable of easily measuring the visual acuity of a presbyopia or a farsighted person without wearing glasses.

[0006]

[Means for Solving the Problems]

 In order to solve the above problems, the present invention provides a case in which a pair of viewing windows and a reading member disposition portion are provided at portions facing the viewing windows with a distance therebetween, and a plurality of lenses having different powers are provided. Inside the case, a two-lens connection body in which the lenses are arranged at regular intervals is placed at the position of the inside of both viewing windows so that the lenses can move in the lens alignment direction while facing the viewing windows. The case is equipped with a feed mechanism that moves the lens coupling body from the outside of the case.

[0007]

[Action]

 One lens of the lens connection body faces the inside of the pair of viewing windows provided in the case, and when you look inside the case through the viewing window, you can see the reading member through the lens. You can know the visual acuity by selecting the lens that can be read clearly while operating the lens assembly to move the lenses and allowing lenses with different powers to face the viewing window.

[0008]

【Example】

 An embodiment of the present invention will be described below with reference to the accompanying drawings.

As shown in the figure, the case 1 is formed such that a base portion 3 which is long in the front-rear direction is connected to the lower end of the inclined rectangular tubular portion 2 so as to be stable and self-supporting. A pair of peepholes 4 and 4 are provided on both sides of the upper end face of the eyepiece so as to match the distance between the eyes of the human eye, and at a position apart from the peepholes 4 and 4 by a predetermined distance on the lower end side of the rectangular tube 2. An arrangement portion 6 of the reading member 5 is provided so as to face each other.

Two lens connecting bodies 7, 7 are arranged at positions on both sides inside the rectangular tube portion 2 of the case 1. In this lens connecting body 7, 7, a large number of frame-shaped holders 9 for mounting the lenses 8 are pivotally connected by a hinge portion 10 to make the whole endless, and are attached to both upper and lower ends of the rectangular tube portion 2. It is wound between the sprockets 11 and 12 and is rotatable, and at the same time, any one of the lenses 8 can be brought close to the inside of the viewing window 4 as shown in FIG. ing.

The lens connecting bodies 7, 7 are sequentially attached to the frame-shaped holder 9 so that the lenses 8 having different powers are arranged in the order of the power, and the sprocket 11, 12 for supporting the lens connecting bodies 7, 7 is as shown in FIG. As shown in FIG. 4, the case 1 is pivotally fixed to the case 1 so as to support both sides of the connected body 7, and the line of sight A is seen between the reading members 5 and the lenses 8 and 8 facing the viewing windows 4 and 4 as shown in FIG. There are no obstacles that prevent

On the upper end side of the rectangular tube portion 2 in the case 1, there is provided a feed mechanism 13 for rotating the lens connecting bodies 7, 7 from the outside of the case 1 so that the respective lenses 8 face the viewing windows 4, 4. Has been.

The feed mechanism 13 is provided with knobs 15 and 15 for rotating operation at both ends of a horizontal shaft 14 attached to the outside of the rectangular tube portion 2 to support the horizontal shaft 14 and both lens connecting bodies 7 and 7. The sprocket wheels 11 and 11 are interlocked with each other by a pair of gears 16 and 17, and the lens coupling bodies 7 and 7 are rotated by turning the knobs 15 and 15.

In the case of FIG. 4, the horizontal shaft 14 is divided into two parts in the middle part and can be freely continued by the clutch 18, and when the clutch 18 is connected, both lens connecting bodies 7, 7 are rotated in synchronization with each other. By pulling the knob 15 to release the coupling of the clutch 18, the lens coupling bodies 7 and 7 are individually rotated by the knobs 15 and 15 on both sides, and the lenses 8 and 8 facing the left and right viewing windows 4 and 4, respectively. It is possible to have different frequencies.

A number 19 indicating the power of the lens 8 is laid on the outer surface of each frame-shaped holder 9 in the lens connecting bodies 7, 7, and a window for reading the number 19 is provided on the upper end of the rectangular tube portion 2. The holes 20 and 20 are provided so that the power of the lens facing the viewing windows 4 and 4 can be known.

In the illustrated case, the lens connecting bodies 7 and 7 are formed by connecting a large number of frame-shaped holders 9 endlessly, mounting the lenses 8 on the frame-shaped holders 9 and providing trochanters on both sides of the inner surface of each frame-shaped holder 9. 21 is engaged with the sprockets 11 and 12, and the trochanter 21 group in the middle is guided by the rails 22 and 23 provided on both sides in the square tube portion 2. The structure is not limited. For example, a lens is mounted between parallel timing belts, and this belt is wound around the timing pulley mounted on the upper end of the square tube. It may be housed in a storage cylinder provided above and below the section.

The case 1 can be made of any material such as a synthetic resin plate, wood, cardboard, and corrugated board, and can be freely disassembled and assembled.

The measuring device of the present invention is configured as described above, and is installed in a store such as a spectacle store, and when the reading member 5 is placed in the placement portion 6, as shown in FIG. 2 Look through the viewing windows 4 and 4 and look through the lenses 8 facing the viewing windows 4 and 4 to see the characters and patterns on the reading member 5.

Further, the feed mechanism 13 is operated by the knobs 15 and 15 to rotate the lens connecting bodies 7 and 7 on both sides to sequentially expose the respective lenses 8 to the viewing windows 4 and 4, and the reading member 5 is most clear. If you select a lens that looks like, you can know the power of your eyesight by reading the power number 19 through the window 20, and you can sell or purchase presbyopia or glasses for hyperopia according to this power.

[0020]

【effect】

 As described above, according to the present invention, it is possible to know the dioptric power by sequentially exposing lenses with different diopters to the viewing window of the case and selecting the lens in which the reading member can be seen most clearly. Therefore, when a person with presbyopia or hyperopia buys glasses, it is possible to know the diopter according to the eyesight simply by moving the lens while looking through the viewing window, and the diopter can be easily measured. There is an effect that the troublesomeness of purchasing will be eliminated and the sales of eyeglasses will increase at Megame stores.

[Brief description of drawings]

FIG. 1 is a perspective view showing an example of a simple measuring device according to the present invention.

FIG. 2 is a vertical sectional view of the above.

FIG. 3 is a vertical sectional side view showing an enlarged main part of the same.

FIG. 4 is a partially cutaway plan view showing an enlarged main part of the simple measuring device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Case 2 Square tube part 4 Viewing window 5 Reading member 6 Arrangement part 7 Lens connection body 8 Lens 13 Feeding mechanism

Claims (1)

[Scope of utility model registration request] 1. A two-row lens in which a pair of viewing windows and a reading member disposition portion are provided in a portion facing the viewing window at a distance from the case, and a plurality of lenses having different frequencies are arranged at regular intervals. The connecting body is arranged inside the case at a position inside the both viewing windows so that the lenses can be moved in the direction in which the lenses face the viewing windows, and the lens is connected to the case by an operation from outside the case. A simple device for measuring visual acuity with a feeding mechanism that moves the body.