JPH0833607A - Ophthalmic equipment - Google Patents

Abstract

(57) [Summary] [Purpose] To enable the subject's face to be easily held in place. [Structure] The forehead support 5 is provided with a first detection means 6 for detecting contact with the forehead, and the chin rest 4 is movable up and down by screwing the support column 9 with the shaft of a motor 7 provided on the base 1. Second and third detecting means 1 configured to detect contact between the column 9 and the base 1 and between the column 9 and the chin rest 4, respectively.
0 and 13 are provided. The detection means 6, 10, 13 are connected to the drive section of the motor 7 via the control means. When measuring the intraocular pressure, if the forehead rests on the forehead rest 5, it is detected by the first detection means 6, the motor 7 is driven through the control means, and the chin rest 4 moves up and hits the chin. Is detected by the detection means 13 and the motor 7 is stopped through the control means to hold the face of the subject P at a predetermined position.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an ophthalmologic apparatus for fixing an image of a subject's face or a part thereof for photographing and measuring an eye to be examined.

[0002]

2. Description of the Related Art Generally, an ophthalmologic apparatus for optometry and photographing and measurement of an eye to be inspected is equipped with a chin rest for determining the position of the face of the person to be inspected. The person or the subject himself / herself manually or electrically adjusts the movement to hold the subject's eye at a predetermined position.

[0003]

However, in most of the conventional ophthalmic instruments, the examiner and the examinee are seated facing each other on the opposite side of the ophthalmic instrument. Therefore, the chin rest on which the subject's chin is placed is on the opposite side of the examiner and away from the examiner. It requires a difficult and difficult posture, and it takes time to adjust the height of the chin rest. Further, with regard to an ophthalmologic apparatus for self-eye examination, which can be independently measured by the examinee without the examiner, there is a problem that it takes time for an unfamiliar examinee to determine the position of the face.

The object of the present invention is to solve the above-mentioned problems,
An object of the present invention is to provide an ophthalmologic apparatus that can easily hold the subject's face at a predetermined position.

[0005]

In order to achieve the above object, an ophthalmic device according to the present invention is an ophthalmic device having means for fixing a face portion of a subject or a part thereof, and a face portion of the subject. Alternatively, a detecting means for detecting that a part of the contact is made, and a position control means for automatically driving a fixing part for fixing the face of the subject or a part thereof by a detection signal of the detecting means. It is characterized by having.

[0006]

In the ophthalmologic apparatus having the above-mentioned structure, the detection means detects the face or head of the subject or a part thereof, and the detection signal determines the face or head of the subject or a part thereof. Is automatically controlled to hold the eye to be inspected at a predetermined position for measurement or photographing.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail based on the illustrated embodiments. FIG. 1 shows an example of a non-contact tonometer. A tonometer main body 2 is slidably provided on the base 1, and the tonometer main body 2
A nozzle 3 is provided on the upper front side of the. Also, the base 1
A chin rest 4 is provided at a front side position of the tonometer body 2 in, and both ends of an arch-shaped forehead rest 5 extending upward are attached to both sides of the chin rest 4. Further, the forehead is brought into contact with the central portion of the forehead support 5, and the first detection means 6 for detecting the contact of the forehead is provided at that position.

As shown in FIG. 2, the chin rest 4 is supported by a drive shaft 8 directed upward from a motor 7 provided on the base 1. In other words, the chin rest 4 has a support column 9 extending downward.
And a female screw hole along the axial center is provided in the column 9. On the other hand, the outer circumference of the drive shaft 8 is a male screw, and the chin rest 4 is supported by screwing the drive shaft 8 and the column 9 with these screws, and the chin rest 4 is driven by driving the motor 7. Can be raised and lowered.

Further, a second detecting means 10 for detecting contact with the support column 9 is provided on the base 1. A vertical guide 11 is provided on the base 1 in order to prevent the support column 9 from rotating when the motor 7 is driven.
A push-up spring 12 that supports the chin rest 4 and a third detection unit 13 that detects contact with the chin rest 4 are provided at the upper end of the column 9.

Further, as shown in FIG. 3, first, second and third
The outputs of the detection means 6, 10, and 13 are “0” when they are detected and “0” when they are not detected, which are combinations of signals “0” and “1” as shown in Table 1. It is connected to the control means 14, and the output of the control means 14 is connected to the drive section of the motor 7.

Table 1 State of chin rest 4 Detecting means 6 Detecting means 10 Detecting means 13 A Jaw rest 4 starts to rise 1 1 0 Ascending 1 0 0 B Jaw rest 4 starts to rise 0 1 1 rise Middle 0 0 1 C Jaw rest 4 is stopped 1 0 1 D Jaw rest 4 is descending 0 0 0 Finished descending 0 1 0 E Jaw rest 4 is the lowest and immovable 1 1 1

In column A, the forehead rest 5 is placed on the forehead rest 5, and the chin rest 4 is raised. In column B, the chin rests on the chin rest 4 and the chin rest 4 is raised. If the forehead rests on the forehead rest 5 and the chin rest 4 hits the chin, the D column indicates that the face is separated from the forehead rest 5 or the chin rest 4 and the chin rest 4 descends. The case where the position of the face is determined at the lowermost position of the chin rest 4 is shown.

The non-contact type tonometer constructed as described above is
Before use, the chin rest 4 is at the lowest position, and when measuring the intraocular pressure, the examinee P first sets the examinee's eye E at the same height as the nozzle 3 as shown in FIG. When P applies the forehead to the forehead support 5, as shown in the column A of Table 1, the first detection means 6
Detects the forehead and outputs a signal "1", the motor 7 is driven by the command of the control means 14, and the drive shaft 8 rotates.
Then, the chin rest 4 rises, comes into contact with the support 9, and outputs the signal "1", and then the second detection means 10 outputs the signal "0" because it is separated from the support 9. At this time, the third detecting means 13 outputs the signal "0" because the chin is not on it.

On the contrary, when the chin of the examinee P is placed on the chin rest 4 first and the heights of the nozzle 3 and the examinee's eye E become equal, the forehead of the examinee P. When the height of the face of the subject P is set so that the subject abuts on the forehead rest 5, when the chin of the subject P is placed on the chin rest 4 as shown in column B of Table 1,
The third detecting means 13 detects the contact with the chin and outputs a signal "1".
Is output, the motor 7 is driven by the command of the control means 14, and the drive shaft 8 rotates. Then, the chin rest 4 rises and comes into contact with the support 9 to output the signal "1", so that the second detecting means 10 separates from the support 9 and outputs the signal "0".

In any of the above cases, when the chin rest 4 continues to rise and the chin of the subject P contacts the chin rest 4, the third detecting means 13 contacts the chin rest 4. When the signal "1" is output or the forehead of the subject P hits the forehead pad 5, the first detection means 6 contacts the forehead and the signal "1" is output,
The motor 7 is stopped by the command of the control means 14, and the subject P
Determine the height position of your face. That is, as shown in the column C of Table 1, when the first and third detecting means 6 and 13 output the signal "1" and the second detecting means 10 outputs the signal "0", respectively, the chin rest 4 becomes Stop.

When the face of the subject P is separated from the forehead rest 5 and the chin rest 4 after the measurement is completed, as shown in column D of Table 1, the first and third detecting means 6 and 13 are provided. The signal "0" is output from the control unit 1 and the signal is sent to the control unit 14 to control the unit 1.
The command of 4 causes the motor 7 to rotate in the reverse direction. Then, the chin rest 4 descends and returns to the lowest initial position, the second detection means 10 contacts the support 9 and outputs a signal "1", and the control means 14 stops the motor 7. Further, when the forehead and the chin rest respectively contact the forehead rest 5 and the chin rest 4 at the lowest position of the chin rest 4, as shown in column E of Table 1, the first, second, and The detection means 6, 10, 13 of 3 all output the signal "1", and the chin rest 4 determines the position of the face at that position.

As described above, the control means 14 controls the motor 7 by the combination of the signals output from the first, second and third detecting means 6, 10 and 13 to raise and lower the chin rest 4. , Stop.

FIG. 4 shows an example of a non-contact tonometer for self-optometry. This tonometer does not require an examiner and can be independently measured by the subject P, and the tonometer main body 2 of the previous embodiment has a measuring unit 2 having an automatic alignment function.
0 is provided.

After the position of the chin rest 4 is determined as described above and the head of the subject P is determined, the tonometer itself determines the positional relationship between the eye E to be inspected and the nozzle 3. , The nozzle 3 is moved to a more precise predetermined position for measuring the eye E.

[0020]

As described above, in the ophthalmologic apparatus according to the present invention, the detecting means detects the face or head of the subject or a part thereof, and the detection signal is used to detect the face or head of the subject or both. The part that determines the part of the eye is automatically driven and controlled, and the eye to be inspected is held at a predetermined position for measuring or photographing, so the burden on the examiner can be reduced and the height of the chin rest can be reduced. Adjustment time can be shortened. Furthermore, in an ophthalmologic apparatus that does not require an examiner, the subject himself / herself can perform measurement and photographing in a shorter time and easily.

[Brief description of drawings]

FIG. 1 is a side view of an example of an ophthalmologic apparatus.

FIG. 2 is an enlarged sectional view of a chin rest.

FIG. 3 is a block circuit diagram.

FIG. 4 is a side view of another example of the ophthalmologic apparatus.

[Explanation of symbols]

 3 Nozzle 4 Jaw Rest 5 Forehead 6 First Detection Means 7 Motor 9 Support 10 Second Detection Means 13 Third Detection Means 14 Control Means 20 Measuring Section

Claims (4)

[Claims] 1. An ophthalmologic apparatus having means for fixing a face or a part of a subject's face, and detecting means for detecting that the face or a part of the subject's face is contacted, and the detection. An ophthalmologic apparatus comprising position control means for automatically driving a fixing part for fixing a face part of a subject or a part thereof according to a detection signal of the means. 2. The ophthalmologic apparatus according to claim 1, wherein a plurality of the detecting means and a plurality of fixing parts are provided. 3. The ophthalmologic apparatus according to claim 1, wherein the fixing portion is a chin rest, and the chin rest is raised to fix the face of the subject. 4. The ophthalmologic apparatus according to claim 1, wherein the fixed portion is a chin rest, and the chin rest is moved to a predetermined position.