JP3269673B2 - Optometry device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optometry apparatus for presenting an eye chart.

[0002]

2. Description of the Related Art There is a demand from spectacle shops and the like that the space for optometry should be as small as possible. In a visual acuity test using a visual acuity chart, a predetermined optometric distance (typically 5 m) is required as a distance between the subject and the visual acuity chart, and therefore, it is difficult to arrange them. As a method of saving space while securing the optometry distance between the subject and the eye chart, there is known a method of arranging a plurality of mirrors and bending a light path to obtain a predetermined optometry distance. This method of bending the optical path has recently been adopted in an apparatus for arranging a mirror in an optometry table. In this apparatus, it is necessary to block the entire optical path from the outside in order to prevent the influence of dust and reflected light from the outside. Therefore, the capacity of the optometry table becomes considerably large.

[0003]

SUMMARY OF THE INVENTION An optometry tape as described above.
Bull saved space at the straight-line distance by bending the optical path with a mirror, but the optical path bending space was reduced.
In order to secure the space, space is required in the vertical direction or the like, and the entire optometry apparatus becomes large, and there is a problem in transportation and installation. An object of the present invention is to provide an optometric apparatus that is easy to transport and install in view of the inconvenience in handling as described above.

[0004]

In order to solve the above-mentioned problems, an optometry apparatus according to the present invention has the following configuration. (1) An optometry table arranged between the subject and the examiner, and moved between the examination position and the retreat position supported by the pole
An optometry apparatus having a possible subjective optometry apparatus;
The luminous flux of the eye chart through a mirror placed above the
A table for presenting a visual acuity chart by reflecting toward the subject's eye
A longitudinal center of the upper surface of the optometry table.
The axis and the central axis in the longitudinal direction of the table upper surface are 45 to 60 degrees
At the intersection angle of
Table edge having the same angle as the intersection angle with respect to the central axis of
With a height substantially equal to the height of the top of the optometry table.
A second table having a table top of a height, and said optometry
Pulled out parallel to the longitudinal center axis of the table top,
And a drawer provided on the second table .

(2) The optometry apparatus of (1) further comprises
An optometer that can be translated in the longitudinal direction of the upper surface of the optometry table
It has a tray for mounting, and the tray is provided on the back of the table
From the top of the table fixed to the moving guide and tray
An arm extending to the back of the table and connected to the moving guide;
And the arm is adjacent to the optometry table and the second table.
Moving the gap provided in the section .

[0006]

[0007]

[0008]

[0009]

[0010]

[0011]

[0012]

[0013]

Embodiment 1 Hereinafter, an embodiment of the present invention will be described with reference to the drawings. 1 to 3 are schematic layout diagrams of an optometry apparatus according to a first embodiment of the present invention. FIG. 1 is a view from the top, FIG. 2 is a front view, and FIG. 3 is a view from the subject side. . This apparatus is mainly composed of an optometry table 2, an objective refraction test apparatus 4, a subjective optometry apparatus 5, a visual acuity table 13 and a control unit. 1 is an eye to be examined and 2 is an optometry table. A pole 3 is fixed to the optometry table 2, and the pole 3 supports the arm 4.
The arm 4 is for suspending the subjective optometry apparatus 5. The arm 4 on which the subjective optometry apparatus 5 is suspended is rotatable around the pole 3, and a shaft 6 fixed to the arm 4 slides up and down inside the pole 3. Since it is possible, the subjective optometry apparatus 5 can be retracted from the front of the subject's eyes.

Reference numeral 7 denotes an objective refraction test apparatus which moves along the end of the optometry table 2. The moving mechanism of the objective refraction inspection apparatus will be described with reference to FIG. FIG. 4 shows an objective refraction test apparatus 7
FIG. 2 is a cross-sectional view including the top plate 8 of the optometry table 2. The objective refraction test apparatus 7 is on a tray 9, and the space between the tray 9 and the top plate 8 is provided via a roller 10. Can be moved in the longitudinal direction. An arm 11 is fixed to the end face of the tray 9, the arm 11 wraps around the side surface of the top plate 8, is connected to a linear guide 12 on the back surface of the top plate 8, and is parallel to the longitudinal direction of the top plate 8. The objective refraction test apparatus 7 can be moved in various directions. Also, a signal cable for connecting the subjective optometry apparatus 5 and the objective refraction test apparatus 7 and a power cable for the objective refraction test apparatus 7 are inserted into the arm 11 so that the cable is provided.
Objective refraction test device 7 without exposing the
Can be sent to the subjective optometry apparatus 5. Since the visual acuity table 13 is adjacent to the optometry table 2 at an angle of about 60 °, a rectangular installation space (FIG. 1) which assumes that the longitudinal direction of the visual acuity table 13 is a wall surface. In consideration of (within the dashed line), the examinee position 35 and the examiner position 36 are included in the installation space, which is the external dimension of the optometry apparatus, and are effective in reducing the overall space.

On the eyesight table 13 is provided a cover mirror-1.
4 is arranged, and the subject looks at the visual acuity table inside the visual acuity table via the mirror in the mirror cover 14 in front.
0 in FIG. 1 indicates an optical axis where the subject looks at the visual acuity table. An optical system as shown in FIG. 5 is arranged inside the eyesight table 13. The visual acuity table projector 15 projects the visual acuity table on the screen 18 via the first mirror 16 and the second mirror 17 through the projection optical path A, and the image 1 of the projected visual acuity table
9 is the second mirror 17, the first mirror 16, the third mirror 2
0, the transparent glass G and the fourth mirror 21 disposed on the mirror cover 14 pass through the optical axis 0 and can be visually recognized by the subject's eye 1. A transparent glass G for shielding the space from the outside is fixed on the top plate, and an anti-reflection coating is applied. However, when the outside is very bright, the subject's subjective optometry apparatus 5 can go back due to the reflection of the transparent glass G.
Since it is visually recognized as a strike, a member having low reflectance is used for the housing of the subjective optometry apparatus 5.

The angle of the fourth mirror 21 is changed by the following configuration according to the height of the eye to be inspected. The fourth mirror -21 is a shaft 22 fixed at the center of the fourth mirror -21.
The cam mirror 23 is disposed at the lower end of the fourth mirror 21, and the rotary shaft 24 of the pulse motor is provided in a hole eccentric to the outer periphery of the cam cylinder 23. A shaft 25 is fixedly provided on the outer periphery of the cam cylinder 23,
When the switch 4 rotates counterclockwise, the switch 26 is pressed and the initial position of the mirror is set. The position of the mirror is determined as follows. A subjective optometry device 5 in front of the subject's eye 1 is fixed to a shaft 6 via an arm 4,
A communication plate 27 extends laterally at the lower end of the shaft 6, and a timing belt 28 is fixed to the end thereof. Pulleys 29 and 30 are disposed at the upper and lower ends of the timing belt 28, respectively. When the pole 3 moves up and down, the pulley 30 rotates via the timing belt 28. A shaft 31 'of a rotary potentiometer 31 is fixed to the center of the pulley 30, and the vertical movement position of the pole 3 is determined by a control circuit as a change signal of the resistance value of the potentiometer 31. 32. The control circuit 32 includes a communication plate 27 and a potentiometer.
A pulse signal for driving the pulse motor 33 is generated from the signal of the motor 31.

The eye chart table 13 includes an optometry lens 34.
Is disposed, and the optometry lens 34 is arranged in a direction in which the lens surface is orthogonal to the longitudinal direction of the table top 8, so that it always faces the subject 36. It is easy to take out from the position of the examiner 37. A control box 38 controls the subjective optometric device 5. The optometry table 2 and the eyesight table 13 are fixed by bolts 39 near the floor (FIG. 6). In general, the cantilever type in which the base and the upper surface are connected near the pole 3 is effective on the side of the optometry table 2 in order to make it easy for the subject to enter and exit. For this reason, the optometry table 2 side becomes unstable, so that fixing with the bolt 39 may be effective. When the subject puts his hand on the optometry table 2, vibration occurs. However, when this vibration is transmitted to the sight table 13, the sight table image fluctuates and the examination itself cannot be performed. Since the optometry table 2 and the visual acuity table 13 are once separated structurally and connected near the bottom which is hardly affected by vibration, they are resistant to vibration.

In the optometry apparatus having the above configuration, one operation procedure will be described below. First, the objective refraction test apparatus 7 is moved together with the tray 9 in front of the subject 36 to perform an objective refraction test. Since there is a gap 40 between the top plate 8 of the optometry table 2 and the top plate of the visual acuity table 13, the arm 11 fixed to the tray 9 includes the visual acuity table 1
3 does not interfere. Further, the eyesight table 13 is inclined toward the examiner, and the examiner can place the elbow in front of the control box 38 when operating the objective refraction test apparatus 7 to measure. Next, after returning the objective refraction inspection apparatus 7 to the retracted position 41, the subjective optometry apparatus 5 is rotated together with the arm 4. The subjective optometric apparatus 5 is lowered together with the shaft 6 so that the height of the optometric window 42 (FIG. 5) of the subjective optometric apparatus 2 matches the height of the subject's eye 1. The vertical movement position of the pole 3 is detected by a potentiometer 31, and the control circuit 32 controls the pulse mode.
The mirror 21 is driven via the tab 33 to match the visual axis of the subject with the optical axis 0 of the visual acuity table.

When the sitting height of the subject is high, the distance between the eye 1 of the subject and the fourth mirror 21 changes because the optical axis 0 has an angle. However, since the screen plate 18 has a mirror,
Assuming that the distance to the eye 1 of the subject through the above is 5 m, the change in the overall distance is ± 5% (250 mm) or less, which is sufficiently acceptable. Note that ± 5% is a normally allowable range as the tolerance of the size of the visual acuity target, because the change in distance is proportional to the size of the target. Confirmation of the visual acuity chart from the examiner can be performed via the visual acuity chart confirmation mirror 43 for the examiner attached to the front of the subjective optometry apparatus 5. The examiner can confirm the image 19 of the visual acuity chart on the screen 18 through the confirmation mirror 43, the fourth mirror 21, the third mirror 20, the first mirror 16, and the second mirror 17, and perform the inspection. Can proceed accurately. The operation of the subjective optometry apparatus 5 is performed by using a visual acuity table 13
This is performed by the control box 38 arranged above. The details are well known and will be omitted. In this embodiment, since the control box 38 can be always placed on the visual acuity table 13, the control box 38 is controlled to avoid interference when the objective refraction test apparatus 7 is moved in front of the subject 36. There is no need to move box 38 to another location. As described above, in the present embodiment, the optometry table 2 and the visual acuity table 13 are merely fixed by the bolts 39, so that they can be easily separated and very effective for transportation and movement. An ordinary elevator has a limited depth and width, and the optometry table 2 and the visual acuity table 13 cannot be inserted as they are, and a large labor and time are required for carrying them in. .

[0020]

Second Embodiment FIGS. 7 and 8 are views of an optometry apparatus according to a second embodiment. In the figure, the same or equivalent parts or members as those of the first embodiment are denoted by the same reference numerals, and duplicate description will be omitted.
FIG. 7 is a top view of the second embodiment. The optometry table 2a and the visual acuity table 13a are adjacent to each other at substantially right angles. Therefore, it is necessary to consider the space of the subject 36, and a larger installation space is required as compared with the first embodiment.
However, when the longitudinal direction of the visual acuity table is arranged parallel to the wall, the visual acuity table is parallel to the line of sight 0 of the subject, so that the arrangement is comfortable. FIG. 8 is a sectional view of the optometry table 2a. The feed screw 51 is rotated by the motor 50 fixed to the base, and the top plate 8 and the port fixed to the nut 52 are rotated.
The tool 3 moves up and down via the fixed guide 53 and the moving guide 54. This is an optometry table for subjects with different sitting heights.
When the measurement is performed by the objective refraction inspection apparatus 7 on a, it is particularly advantageous as compared with the first embodiment.

In the second embodiment, the height of the optometry window 42 (FIG. 5) of the subjective optometry apparatus 5 rises and falls due to two factors. One is the movement of the shaft 6 with respect to the pole 3 shown in the first embodiment, and the other is the movement of the moving guide 54 with respect to the fixed guide 53 by the motor 50. In the same manner as the movement of the shaft 6 with respect to the above. That is, in the second embodiment, two potentiometers are used.
The output of the mirror is input to the control circuit 32 (FIG. 5), and the fourth mirror
By driving 21, the line of sight of the subject and the height of the visual acuity table optical axis can be matched. In the second embodiment as well, the same effect as in the first embodiment can be achieved by fixing the base and the lower part of the visual acuity table 13 with bolts 39. However, in the second embodiment, the vibration by the motor is provided. Therefore, it is more desirable that the dispersion is completely performed only in the adjacent area and completely dispersed. 9 and 10 show examples of the optical system inside the visual acuity table 13. FIG. Both are the first to fifth mirrors.
I use 5 mirrors (55-59),
In FIG. 9, the second mirror reflects the screen image only once, but in FIG. 10, it reflects three times.

[0022]

Embodiment 3 FIG. 11 shows a third embodiment. Compared to the first embodiment, the difference is that the optometry table 2 and the top plate of the visual acuity table 13 are a top plate 8b. In this case, the arm 11 shown in the first embodiment cannot be arranged,
It is necessary to arrange the linear guide 12b on b. Also,
Problems also occur with respect to vibration as compared with the first embodiment. However, there is an advantage that when the use of the objective refraction inspection apparatus 7 is unnecessary, the appearance becomes excellent. Also in the case of the third embodiment, the optometry table side and the visual acuity table side are structurally separated except for the exterior part, and when the top plate 8b or the like is removed, the optometry table side and the visual acuity table side are removed. The same is true in that the cable side can be separated and there is an advantage in transportation. In the embodiment described above, the mirror in front of the eye to be examined is driven, but the same effect can be obtained by driving another mirror or a visual acuity chart projection device. In the optical element in the eye chart table, also suitable if a part that is fixed to the eye table side by Union structural
Can be used.

[0023]

According to the configuration of the present invention, the optometry table arranged between the subject and the examiner is combined with the second table.
By making use of the space effectively,
The examiner can use the space effectively to advance the optometry smoothly
I can .

[Brief description of the drawings]

FIG. 1 is a top view of an optometry apparatus according to a first embodiment of the present invention.

FIG. 2 is a side view of the first embodiment viewed from an examiner.

FIG. 3 is a side view of the first embodiment viewed from a subject.

FIG. 4 is a sectional view showing a driving mechanism of the optometer.

FIG. 5 is a diagram showing an optical system and a mirror driving system of a visual acuity table;

FIG. 6 is a diagram showing fixation of an optometry table and a visual acuity table;

FIG. 7 is a top view of the second embodiment.

FIG. 8 is a sectional view of an optometry table of a second embodiment.

FIG. 9 is a diagram showing a first optical system inside a visual acuity table;

FIG. 10 is a diagram showing a second optical system inside a visual acuity table;

FIG. 11 is a top view of the third embodiment.

[Explanation of symbols]

 2 optometry table 3 pole 4 arm 5 subjective optometry device 13 visual acuity table 21 mirror

Claims (2)

(57) [Claims] An optometry table arranged between an examinee and an examiner, between an examination position and a retracted position supported by a pole.
Optometric apparatus having a subjective optometric apparatus movable in
Eye chart through a mirror placed above the table surface
To reflect the luminous flux toward the subject's eye and present a visual acuity chart
A table having a longitudinal direction on an upper surface of the optometry table.
45 ° between the center axis of the table and the longitudinal center axis of the table top
Intersect at an intersection angle of ~ 60 degrees and the top of the table
A tape having the same angle as the intersection angle with respect to the longitudinal center axis.
With a bull edge, the height of the top of the table for optometry is substantially
A second table having a table top of the same height
Pull in parallel with the central axis in the longitudinal direction of the upper surface of the optometry table.
And a drawer provided on the second table.
Optometric apparatus according to claim Rukoto. 2. The optometry apparatus according to claim 1 , further comprising:
An optometer that can be translated in the longitudinal direction of the upper surface of the optometry table
It has a tray for mounting, and the tray is provided on the back of the table
From the top of the table fixed to the moving guide and tray
An arm extending to the back of the table and connected to the moving guide;
And the arm is adjacent to the optometry table and the second table.
An optometry apparatus for moving a gap provided in a part .