JPH0215475Y2 - - Google Patents

Description

[Detailed explanation of the idea] "Industrial application field" The present invention relates to a visual focus trainer.

``Prior Art'' In recent years, various training devices for the purpose of restoring visual acuity have been proposed and come into use, but all of them are large-scale and expensive, so they are only used in hospitals, etc. It is.

``Problems that the invention attempts to solve'' The present invention was developed in view of the above points, and is compact, does not take up much space for training, and is much cheaper to purchase than conventional equipment. To provide a visual acuity focus training device which is easy to obtain even in ordinary households, and which enables visual acuity focus training to be easily performed anytime and anywhere.

"Means for Solving the Problems" The present invention will now be described in more detail with reference to illustrated embodiments.

Fig. 1 is a perspective view, Fig. 2 is a plan view, Fig. 3 is a plan view with the lid open, Fig. 4 is a plan view of the cartridge with film loaded, and Fig. 5 is a central cross section. FIG. 6 is a schematic explanatory diagram.

In the figure, 1 is a box-shaped case made of plastic or the like. The case 1 has a peephole 2 on one vertical surface,
2, a rubber light-shielding cover 3 is attached around the peep holes 2, 2, and a cartridge film outlet 4 is provided on the upper surface opposite to the peep holes 2, 2, and the cartridge film A lid body 5 is attached to the outlet 4 so as to be openable and closable. 6 is a hinge portion of the lid 5, and 7 is a lock portion. 8,8 is case 1
This is a cartridge film accommodating portion provided on the side opposite to the peep holes 2, 2 inside. Reference numeral 9 denotes a cartridge film, which is loaded into cartridge film accommodating portions 8, 8 provided in the case 1 on the side opposite to the peepholes 2, 2. The cartridge film 9
A film 10 on which a plurality of charts 10a (Landolt ring charts in this embodiment) consisting of characters, figures, etc. of a required size are sequentially displayed is placed on one end of the film 10 on the winding shaft 12 of the magazine 11 on the winding side.
, the other end is the winding shaft 1 of the magazine 13 on the rewinding side.
4, and magazine storage cases 15, 15 are installed at both ends.
A hollow portion 16a having a size suitable for the chart 10a is provided in the center of the plate-shaped film guide portion 16 that connects the magazine storage casings 15, 15.
The magazine storage case 1 of the cartridge 17 provided with
The magazines 11 and 12 are housed in the magazines 5 and 15, respectively. Also, chart 10a
In this embodiment, the background is fluorescent red or green, and the Landolt ring is black. Furthermore, the size of the characters, figures, etc. (Landolt ring in this embodiment) displayed on the film 10 needs to be adapted to the visual acuity of the trainee, so that the visual acuity is 0.01 to 0.1, 0.2 to 0.5. , 0.6 to 1.0 are preferably manufactured separately.

18 is a film transport device;
A drive motor (not shown) built in the bottom of the case 1 is driven by winding or rewinding switches 19 and 20 provided at required locations on the outer surface of the case 1,
The film is wound around the winding shaft 12 of the magazine 11 on the film winding side so that one film is addressed, or the film is wound around the winding shaft 14 of the magazine 13 on the rewinding side.

21 is the film 1 in the case 1;
It is arranged on the back side of 0 (opposite side to the lens described later),
This lamp is designed to be turned on when the chart 10a of the film 10 reaches the hollow portion 16a of the cartridge 17.

Reference numerals 22 and 22 denote lenses that are attached to the peepholes 2 and 2 of the case 1 so that the chart 10a of the film 10 can be seen reduced to a required magnification. In other words, the lenses 22, 22 have the same effect when viewed from a distance of 5 meters from a chart used in a visual acuity test.
This is to make the chart 10a visible.

"Operation" Next, the operation of the present invention having the above configuration will be explained.

First, the lid 5 of the case 1 is opened and the cartridge film 9 is loaded into the case 1. After loading, close the lid 5 and look into the case 1 through the peepholes 2, 2, and you will see that the inside is completely dark.If you stay like that for about 5 minutes, you will dark adapt and the tension of the ciliary muscle that adjusts the thickness of the crystalline lens will increase. is alleviated.

After that, when the take-up switch 19 is pressed, a drive motor (not shown) is driven to rotate the winding shaft 12 of the magazine 11 on the winding side, and the film 10 is rotated.
Withdraw one chart. And chart 10
At the same time as the cartridge a reaches the hollow portion 16a of the cartridge 17 and stops, the lamp 21 lights up. At this time, the trainee can see the chart 10 through the lenses 22, 22.
Stare at the Landolt ring of a. It should be noted that each chart shows a plurality of Landolt rings, so we will look at these in turn. When viewed through the lenses 22, 22, the Landolt ring is reduced in size and appears to be as small as the Chart Landolt ring used for visual acuity tests when viewed from a distance of 5 meters. After staring at one chart 10a in this way, next turn the take-up switch 1.
9 is pressed again and this is repeated to stare at the charts displayed on one film 10 one after another.

In this way, by first relaxing the tension in the hair model muscles through dark adaptation, and then gazing centrally at each chart one after another in this relaxed state, the adjustment of focus becomes extremely smooth. .

When the entire chart displayed on the film 10 has been viewed, the rewind switch 20 is pressed and the film 10 is moved to the magazine 13 on the rewind side.
It is wound onto a winding shaft 14.

Next time, the training should be carried out in the same manner as above.

``Effects of the Invention'' The present invention has the above-mentioned structure and function, and is extremely compact, so it does not take up much space for training, and can be easily performed at any time. Additionally, since there are fewer components, it can be manufactured much more cheaply than conventional equipment.
It is extremely suitable as a visual focus training device for general use.

[Brief explanation of drawings]

Fig. 1 is a perspective view, Fig. 2 is a plan view, Fig. 3 is a plan view with the lid open, Fig. 4 is a plan view of the cartridge with film loaded, and Fig. 5 is a central cross section. FIG. 6 is a schematic explanatory diagram. 1... Case, 2, 2... Peep hole, 3... Light shielding cover, 4... Cartridge film outlet, 5...
... Lid body, 9 ... Cartridge film, 10 ...
Film, 10a... Chart, 11... Winding side magazine, 12... Winding shaft, 13... Rewinding side magazine, 14... Winding shaft, 15, 15... Magazine housing case, 16... Film guide section , 16a
... hollow section, 17 ... cartridge, 18 ... film transport device, 19 ... take-up switch, 2
0... Rewind switch, 21... Lamp, 2
2, 22...lens.

Claims (1)

[Scope of utility model registration request] A peephole is provided on one vertical surface, and a light-shielding cover is attached around the peephole, and a cartridge film outlet is provided on the upper surface opposite to the peephole, and the cartridge film outlet is openable and closable. A box-shaped case with a lid attached to it, and a film in which a plurality of charts consisting of letters, figures, etc. of the required size are sequentially displayed, one end of which is attached to the winding shaft of the magazine on the winding side, and the other A hole of a size suitable for the chart is provided in the center of a plate-shaped film guide portion whose end side is connected to the winding shaft of the magazine on the rewinding side, and a magazine storage case is formed at both ends, and which connects the magazine storage case. Each of the two magazines is housed in the magazine housing of a cartridge provided with a through-hole, and a cartridge film is loaded on the side opposite to the peep hole in the case, and a winding is provided on a required part of the outer surface of the case. The take/rewind switch is used to drive the drive motor built into the case, and the film is wound around the winding shaft of the magazine on the winding side so that one film is addressed, or the winding of the magazine on the rewinding side is driven. a film transporting device configured to wind the film around a shaft; and a lamp disposed on the back side of the film in the case to light up when the chart of the film reaches the hollow part of the cartridge. and a lens attached to the peephole of the case for making the film chart appear reduced to a required magnification.