JPH08173383A - Ophthalmic instrument - Google Patents

Abstract

PURPOSE: To provide an ophthalmic instrument capable of easily aligning even in a case the physical features of a testee exceeds an assumption. CONSTITUTION: This ophthalmic instrument is equipped with a face receiving member 19 to fix a testee's face and an ophthalmic instrument main body 3 provided on a frame 2 slidably between the advance limit position coming near to the testee and the retreat limit position going away from the testee. The face receiving member 19 of this ophthalmic instrument is so constituted as to be able to come near to and go away from the frame 2.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a non-contact tonometer, etc. which measures the intraocular pressure by ejecting an air pulse to the cornea by aligning the main body of the apparatus with respect to the eye to be examined and detecting the completion of the alignment. Regarding ophthalmic instruments.

[0002]

2. Description of the Related Art Conventionally, as shown in FIGS.
An ophthalmologic instrument such as the tonometer 1 is provided with an ophthalmologic instrument body 3 that is slidable in the front-back and left-right directions with respect to a gantry 2.

A chin rest base 4 is disposed on the pedestal 2,
A forehead holder 5 for abutting the subject's forehead and a jaw holder 6 for placing a jaw are provided on the jaw holder base 4.

Further, an air injection nozzle 7 for measuring intraocular pressure, an objective lens (not shown) for alignment and the like are provided on the front side of the ophthalmologic instrument body 3.

A joystick 8 is provided in the ophthalmic instrument body 3, and the examiner uses the joystick 8 to attach the eyepiece 5 and the chin rest 6 to the subject's eye to be substantially fixed. Then, the ophthalmologic instrument body 3 is slid in the front-back, left-right, or up-down directions to perform alignment, and then the intraocular pressure is measured.

As shown in FIG. 8, stoppers 9 and 11 for preventing the air injection nozzle 7 or the like from contacting the eye to be inspected and the ophthalmologic instrument body 3 between the ophthalmologic instrument body 3 and the gantry 2. Stoppers 10 and 12 that prevent the frame from falling off
Are provided respectively, and the ophthalmologic instrument body 3 is configured to be slidable with respect to the gantry 2 within a predetermined range. In addition, stoppers for preventing falling are similarly provided in the left-right direction.

Further, the joystick 8 has a structure shown in FIG.
As shown in FIG. 3, the rotating body 13 is connected by a timing belt 14, and a lead screw (not shown) is rotated to move the top plate 16 on which the ophthalmologic instrument body 3 is placed up and down together with the guide 15. . This top plate 16
Is regulated by stoppers 17 and 18 so that the vertical sliding range is within a predetermined range.

[0008]

However, in the conventional ophthalmologic apparatus thus constructed, the stoppers 9 to 9 are used.
12, etc., the ophthalmic instrument main body 3 within a predetermined range,
Since it is slidable with respect to the gantry 2, for example, the face of the subject may be deeper than expected, and the subject's eye may be out of the preset slide range in the front-back direction. .

Further, the pupil width of the face of the examinee is wider than expected, and the examinee's eye sometimes deviates from the preset lateral slide range of the ophthalmologic instrument body 3.

Further, the face of the subject has a surface length longer than expected, and the subject's eye sometimes deviates from the vertical movement range of the ophthalmologic instrument body 3 in which the subject's eye is set.

For this reason, the subject must move his or her face and keep still at an unstable position where the face does not contact the forehead holder 5 and the chin rest 6, which makes alignment difficult. It was supposed to be.

[0012] Therefore, an object of the present invention is to provide an ophthalmologic apparatus that can easily perform alignment even when the physical characteristics of the subject exceed the expectations.

[0013]

In order to achieve the above object, an ophthalmologic apparatus according to the present invention has a face receiving member for fixing the face of an examinee according to the first aspect of the invention. In an ophthalmologic instrument having an ophthalmologic instrument body slidably arranged on a gantry, between an advance limit position approaching the subject and a retreat limit position distant from the subject, the face receiving member is It features an ophthalmologic instrument that can be moved toward and away from the gantry.

According to the second aspect of the present invention, a face receiving member for fixing the face of the subject, a forward limit position close to the subject, and a backward limit position far from the subject. And a detection means for detecting that the slide of the ophthalmologic instrument body with respect to the pedestal has reached a limit position, and the ophthalmic instrument body having an ophthalmologic instrument body slidably disposed on the gantry. And a drive mechanism for driving the face receiving member in a direction approaching the ophthalmic instrument main body based on the detection result of 1.

According to the third aspect,
A face receiving member for fixing the face of the subject, and a slidable arrangement on the gantry between a forward limit position approaching the subject and a backward limit position distant from the subject. , An ophthalmologic instrument having an ophthalmologic instrument body slidably arranged in the vertical and horizontal directions, the slide of the ophthalmologic instrument body toward and away from the gantry has reached a limit position. Front and rear limit detecting means for detecting that the front and rear limit detecting means, and a front and rear drive mechanism for moving the space between the gantry and the face receiving member close to and away from each other based on the detection result of the front and rear limit detecting means, and a vertical slide of the ophthalmologic instrument main body with respect to the gantry. The upper and lower limit detecting means for detecting that the limit position has been reached, and the up-down direction driving means for vertically moving the relative position between the gantry and the face receiving member based on the detection result of the upper and lower limit detecting means. A mechanism, a lateral slide of the ophthalmic instrument main body with respect to the gantry, and a left and right limit detecting means for detecting that a limit position has been reached, and the gantry and the face receiving member based on the detection result of the left and right limit detecting means. It is characterized by an ophthalmologic instrument having a horizontal drive mechanism that moves the relative position in the horizontal direction.

[0016]

According to the first aspect of the ophthalmologic apparatus of the present invention, even if the slide of the ophthalmologic apparatus main body with respect to the gantry reaches the limit position of the slide range in the direction approaching the eye to be inspected, the gantry and the face The distance between the eye to be inspected and the main body of the ophthalmologic apparatus is further reduced by bringing the distance between the receiving member and the receiving member close.

Therefore, for example, even when the face of the subject is deeper than expected and the eye of the subject is out of the preset slide range in the front-rear direction, the subject's eye should be brought closer. Since it is possible, alignment can be performed.

According to the second aspect of the present invention, when the slide of the ophthalmologic instrument main body with respect to the gantry reaches the limit position of the slide range in the direction of approaching the eye to be inspected, the detecting means detects and drives. Drive the mechanism. In the drive mechanism,
Since the space between the gantry and the face receiving member is close to each other, the space between the eye to be inspected and the ophthalmologic apparatus body is further close to each other.

Therefore, for example, even when the face of the subject is deeper than expected and the eye of the subject is out of the preset slide range in the front-rear direction, it is further automatically performed. Alignment can be performed by making the relative positions close to each other.

Further, according to the third aspect, when the slide of the ophthalmologic apparatus main body with respect to the gantry reaches the limit position of the predetermined range, each of the limit detecting means is brought into conduction, and the face receiving member is moved. Each of the drive mechanisms is driven so as to move toward and away from the ophthalmologic instrument body or slide in the vertical and horizontal directions.

Therefore, for example, when the face of the subject is longer than expected, or when the eye width is wide, the subject's eye deviates from the preset sliding range in the vertical and horizontal directions. Even in this case, the relative position can be further moved in the vertical and horizontal directions, so that alignment can be performed.

[0022]

1 to 6 are views showing an embodiment of the present invention. It should be noted that the same or equivalent parts as those in the conventional example will be described with the same reference numerals.

In FIG. 1, reference numeral 101 is a tonometer as an ophthalmologic instrument of this embodiment, which is slidable within a predetermined range in the front-back direction, which is the approaching and separating direction, and in the left-right direction and the up-down direction. An ophthalmologic instrument body 3 to be arranged is provided.

A face receiving member 19 is attached to the mount 2 as shown in FIG.
As shown in FIG. 2, the forehead holder 5 and the jaw holder 6 on which the forehead of the subject is placed and the jaw holder 6 which are arranged so as to be slidable along the guide pins 20 and 20 are moved away from the gantry 2. It can be moved in any direction. Examinee 5
The face is fixed by bringing the jaw into contact with the chin rest 6 and placing the chin on the chin rest 6, and the face is moved together with the face receiving member 19.

In addition, on the front side of the ophthalmic instrument body 3,
An air injection nozzle 7 for measuring intraocular pressure, an objective lens (not shown) for alignment, and the like are provided.

A joystick 8 is provided on the ophthalmologic instrument body 3, and the examiner uses the joystick 8 to face the subject's face fixed by the forehead holder 5 and the chin rest 6. The ophthalmologic instrument body 3 is slid in the front-back, left-right, or up-down directions to perform alignment, and then the intraocular pressure is measured.

The ophthalmologic instrument body 3 has a monitor 3a for observing the anterior segment of the eye to be examined, an optical system for measuring intraocular pressure, and the like, and is covered with a design cover.

As shown in FIG. 2, front and rear microswitches 21 and 22 and microswitch switching pressing members 23 and 24 as limit detecting means are provided between the ophthalmic instrument body 3 and the gantry 2. Then, when the slide of the ophthalmologic apparatus main body 3 with respect to the gantry 2 reaches the limit position of the slide range in the direction approaching the eye to be inspected, the front microswitch 21 is pressed by the microswitch switching pressing member 23.
It is configured to be electrically connected by being ridden on and pressed by.

Further, the ophthalmologic apparatus main body 3 for the pedestal 2
When the slide reaches the limit position of the slide range in the direction away from the eye to be inspected, the rear micro switch 22 rides on and is pressed by the micro switch switching pressing member 24 so as to be conducted.

Between the ophthalmologic instrument body 3 and the gantry 2, left and right microswitches 25 and 26 and left and right microswitch switching pressing members (not shown) as limit detecting means are respectively arranged, When the horizontal slide of the ophthalmologic instrument body 3 with respect to the gantry 2 reaches the limit position of the slide range, the left and right micro switches 25,
Each of the micro switches 26 is configured to be electrically connected by being pushed on the micro switch switching pressing member.

Further, the joystick 8 has a structure shown in FIG.
As shown in FIG. 3, the rotating body 13 is connected by a timing belt 14, and a lead screw (not shown) is rotated to move the top plate 16 on which the ophthalmologic instrument body 3 is placed up and down together with the guide 15. . This top plate 16
The upper and lower microswitches 28 and 29 as limit detection means arranged on the mounting plate 27 regulate the slide range in the vertical direction within a predetermined range.

Then, when the vertical slide of the ophthalmologic instrument main body 3 with respect to the gantry 2 reaches the limit position of the slide range, the top plate 16 moves the vertical microswitches 28,
29 to contact with each other, and these upper and lower micro switches 2
It is configured such that when 8 and 29 are respectively pressed, they become conductive.

The front / rear, left / right, and up / down micro switches 21, 22, 25, 26, 28, 29 are connected to a drive control circuit 30 as shown in FIG.

Next, the drive mechanism will be described. In the drive mechanism of this embodiment, the distance between the pedestal 2 and the face receiving member 19 is moved toward and away from each other by using the front-rear motor 31 as a drive actuator as shown in FIG. 4, so that the eye to be inspected and the ophthalmologic instrument. The distance from the main body 3 is set to be close to and away from each other.

The front-rear motor 31 is provided with a lead screw 32 which rotates with the rotation of the rotary shaft. The lead screw 32 is screwed into a female screw (not shown) formed on the lower portion of the face receiving member 19, and is configured to move the face receiving member 19 in the front-back direction by rotation.

Further, in the drive mechanism of this embodiment, the left and right motor 34 as a drive actuator for moving the block member 33 fixing the guide pins 20, 20 and the front and rear motor 31 in the left and right direction with respect to the frame 2. It is provided.

The left and right motors 34 are provided with lead screws 35 that rotate with the rotation of the rotary shaft. The lead screw 35 is screwed into a female screw (not shown) formed on the block member 33, and is configured to move the block member 33 in the left-right direction by rotation. Further, as shown in FIG. 5, the chin rest 6 is provided on the lower member 19 a of the face receiving member 19.
A vertical motor 36 is provided as a drive actuator for moving the motor 9 in the vertical direction.

The vertical motor 36 is provided with a lead screw 37 which rotates with the rotation of the rotary shaft. The lead screw 37 is provided on the upper member 19 of the face receiving member 19.
It is screwed into a female screw (not shown) formed in b, and the upper member 19b is rotated to rotate the upper member 19b.
Guide member 3 inserted into and removed from the guide hole formed in 9b
It is configured to slide in the up-down direction along the lines 8 and 38.

The motors 31, 34 and 36 are connected to the drive control circuit 30.

A chin rest switch 39 as a centering switch is provided on the upper surface side of the chin rest 6. The chin rest switch 39 conducts when the chin of the subject is placed on the chin rest 6, and when the chin is removed,
The drive control circuit 30 is configured to release the conduction.
It is connected to the.

Next, the operation of this embodiment will be described.

The subject fixes his face by placing his chin on the chin rest 6 and bringing the forehead into contact with the forehead rest 5. At this time, in this embodiment, the chin rest switch 39 provided on the chin rest 6 becomes conductive, and the drive control circuit 30 becomes
The drive is ready.

By operating the joystick 8, the examiner slides the position of the ophthalmologic instrument body 3 with respect to the gantry 2 in the front-back, left-right and up-down directions within a predetermined range to perform alignment. At this time, the monitor 3a displays a guide arrow for guiding and a reach distance to a position suitable for intraocular pressure measurement. The examiner can perform alignment in a short time by operating the joystick 8 while looking at the guide arrow and the reaching distance.

Then, when the slide of the ophthalmologic instrument body 3 with respect to the gantry 2 reaches the limit position of the slide range in the direction approaching the eye to be inspected, the front microswitch 21
However, it rides on the microswitch switching pressing member 23 and becomes conductive. Due to the conduction of the front micro switch 21, the drive control circuit 30 causes the front and rear motors 3 of the drive mechanism to operate.
Drive 1 In the drive mechanism, the distance between the pedestal 2 and the chin rest 6 is driven by the drive of the front-rear motor 31 so that the face rest member 19 is slid in the approach direction along the guide pins 20, 20 to move closer to each other. The distance between the optometry and the ophthalmologic instrument body 3 is further reduced.

Therefore, for example, even if the face of the subject is deeper than expected and the subject's eye is out of the preset slide range in the forward direction, the subject's face can be brought closer to the subject automatically. Since it is possible, alignment can be performed.

When the slide of the ophthalmologic instrument body 3 with respect to the gantry 2 reaches the limit position of the slide range in the direction away from the eye to be inspected, the rear microswitch 22 rides on the microswitch switching pressing member 24 and conducts electricity. .
By the conduction of the rear micro switch 22, the drive control circuit 3
At 0, the front-back motor 31 of the drive mechanism is driven. In the drive mechanism, the gantry 2 is driven by driving the front-back motor 31.
The distance between the chin rest 6 and the chin rest 6 slides the face receiving member 19 along the guide pins 20, 20 in the separating direction. By this movement, the distance between the eye to be inspected and the ophthalmologic instrument body 3 is further separated.

Further, when the lateral slide of the ophthalmologic instrument main body 3 with respect to the gantry 2 reaches the limit position of the predetermined range, the left and right microswitches 25, 26 ride on the microswitch switching pressing member and either Conducts. By the conduction of the left and right micro switches 25 and 26, the drive control circuit 30 drives the left and right motors 34 of the drive mechanism. In the drive mechanism, the left and right motors 34 are driven to move the block member 33 in the left-right direction with respect to the gantry 2, and together with the block member 33,
The face receiving member 19 is slid in either the left or right direction.

For this reason, for example, when the pupil width of the face of the subject is wider than expected, the subject's eye is out of the preset sliding range of the ophthalmologic instrument body 3 in the left-right direction with respect to the gantry 2. Even if it happens, the face receiving member 19 can be automatically moved further in the left-right direction, so that alignment can be performed so that the eye to be inspected is positioned in front of the air injection nozzle 7.

When the vertical slide of the ophthalmologic apparatus main body 3 with respect to the gantry 2 reaches the limit position within a predetermined range, the upper and lower micro switches 28 and 29 are provided with the top plate 16.
Abut on each other and one of them becomes conductive. By the conduction of the upper and lower micro switches 28 and 29, the drive control circuit 30
The vertical motor 36 of the drive mechanism is driven. In the drive mechanism, the upper and lower motors 36 are driven to drive the upper member 19b.
Along the guide members 38, 38 can be slid in any of the up and down directions.

Therefore, for example, when the face of the subject is longer than expected, the eye to be inspected is out of the preset sliding range of the ophthalmologic instrument body 3 with respect to the pedestal 2 in the vertical direction. Even if it happens, the face receiving member 19 can be further automatically moved in either the upper or lower direction, so that the alignment can be performed so that the eye to be inspected is located in front of the air injection nozzle 7.

As described above, even when the physical characteristics of the subject exceed the expectations, the examiner can use the joystick 8 to move the ophthalmologic instrument body 3 relative to the gantry 2 in the front-back, left-right, and up-down directions. Following the movement, the relative position of the face receiving member 19 is automatically moved while holding the joystick 8 so that the alignment can be easily performed.

After completion of the alignment, an air pulse is jetted from the air jet nozzle 7 to press the cornea of the eye to be examined and the intraocular pressure is measured.

When the subject removes his / her chin from the chin rest 6 after measuring the intraocular pressure, the chin rest switch 39 is released, and the drive control circuit 30 causes the motors 31, 34, 3 to move.
A centering drive signal is supplied to 6. Each motor 3
1, 34, 36 receive the centering drive signal and rotationally drive the lead screws 32, 35, 37 so as to return to the initial position which is the substantially central position of each slide drive range. Therefore, the next subject can perform the alignment from the state where the centering is completed.
The alignment can be immediately performed without being affected by the positional deviation of the face receiving member 19 due to the drive of the motors 31, 34, 36 of the subject. Therefore, it is convenient to use.

Although the embodiment of the present invention has been described in detail above with reference to the drawings, the specific structure is not limited to this embodiment, and the present invention can be applied even if there is a design change or the like within a range not departing from the gist of the present invention. include.

For example, in the above embodiment, the face receiving member 19 is slid to the left and right by the left and right motors 34, but the invention is not limited to this, and for example,
The face receiving member 19 may be rotated in the left-right direction.

Further, in the above-mentioned embodiment, the micro switch 21 or the like is used as the limit detecting means. However, even if various sensors such as a contact type sensor or other electric contacts are connected, the drive actuator is caused by conduction. It is sufficient if it is configured to drive the.

Furthermore, in the above-mentioned embodiment, the front and rear motor 31 driven by the control current is used as the drive actuator, but the present invention is not limited to this, and for example, a hydraulic motor or
Any type of actuator such as a fluid actuator such as a hydraulic piston or another type of electric motor may be used as long as it can move the face receiving member 19.

In the above embodiment, the chin rest switch 39 as the centering switch is provided on the chin rest 6, but the present invention is not limited to this. For example, the chin rest switch 39 is provided on the monitor 3a mounting surface of the ophthalmologic instrument body 3 or the like. A centering switch may be provided and an examiner may operate this centering switch.

[0059]

According to the first aspect of the ophthalmologic apparatus according to the present invention, the slide of the ophthalmologic apparatus main body with respect to the mount is
Even if the limit position of the slide range is reached in the direction of approaching the eye to be inspected, the distance between the eye to be inspected and the ophthalmologic apparatus main body is further brought close by bringing the distance between the gantry and the face receiving member close.

Therefore, for example, even when the face of the subject is deeper than expected and the subject's eye is out of the preset slide range in the front-rear direction, the subject's eye should be brought closer. Since it is possible, alignment can be performed.

According to the second aspect of the present invention, when the slide of the ophthalmologic instrument main body with respect to the gantry reaches the limit position of the slide range in the direction of approaching the eye to be inspected, the detecting means detects and drives. Drive the mechanism. In the drive mechanism,
Since the space between the gantry and the face receiving member is close to each other, the space between the eye to be inspected and the ophthalmologic apparatus body is further close to each other.

Therefore, for example, even if the face of the subject is deeper than expected and the eye of the subject is out of the preset slide range in the front-rear direction, it is further automatically performed. Alignment can be performed by making the relative positions close to each other.

Further, according to the third aspect, when the slide of the ophthalmologic instrument main body with respect to the gantry reaches the limit position of the predetermined range, each of the limit detecting means is brought into conduction and the face receiving member is moved. Each of the drive mechanisms is driven so as to move toward and away from the ophthalmologic instrument body or slide in the vertical and horizontal directions.

Therefore, for example, when the face of the subject is longer than expected, or when the eye width is wide, the subject's eye is out of the preset sliding range in the vertical and horizontal directions. Even in such a case, the relative position can be further moved in the vertical and horizontal directions, so that a practically useful effect that alignment can be performed is exhibited.

[Brief description of drawings]

FIG. 1 is a side view of an ophthalmologic apparatus according to an embodiment of the present invention.

FIG. 2 is an enlarged cross-sectional view of a portion where a detection means is provided in the same embodiment.

FIG. 3 is an enlarged partial sectional view of a main part of the same embodiment.

FIG. 4 is an enlarged partial cross-sectional view of a front / rear / left / right driving mechanism arrangement portion of the same embodiment.

FIG. 5 is a front view of the face receiving member of the same embodiment.

FIG. 6 is a block front view illustrating the electrical connection of the same embodiment.

FIG. 7 is a side view of a conventional ophthalmologic apparatus.

FIG. 8 is an enlarged sectional view of a stopper portion of a conventional example.

FIG. 9 is an enlarged partial sectional view of a main part of a conventional example.

[Explanation of symbols]

 2 mount 3 ophthalmic instrument main body 19 face receiving member detecting means 21, 22 front and rear micro switch 25, 26 left and right micro switch 28, 29 vertical micro switch drive mechanism 30 drive control circuit drive actuator 31 front and rear motor 34 left and right motor 36 upper and lower motor

Claims (3)

[Claims] 1. A face receiving member for fixing a subject's face, and a slide mountable between a forward movement limit position approaching the subject and a backward movement limit position far from the subject. An ophthalmologic apparatus having an ophthalmologic apparatus body provided, wherein the face receiving member is configured to be able to approach and separate from a pedestal. 2. A face receiving member for fixing the face of the subject, and a slide support on a pedestal between an advance limit position approaching the subject and a retreat limit position distant from the subject. In an ophthalmologic instrument having an ophthalmologic instrument body provided, a detection means for detecting that the slide of the ophthalmologic instrument body with respect to the gantry has reached a limit position, and the face receiving member based on the detection result of the detection means. And a drive mechanism for driving the device in a direction approaching the main body of the ophthalmic device. 3. A face receiving member for fixing a subject's face, and a slide support on a pedestal between an advance limit position approaching the subject and a retreat limit position distant from the subject. In an ophthalmologic instrument having an ophthalmologic instrument body that is disposed and has a predetermined limit position in the up, down, left, and right directions, and a slidable direction of the ophthalmologic instrument body with respect to the mount, A front / rear limit detecting means for detecting that the limit position has been reached, a front / rear drive mechanism for moving the space between the gantry and the face receiving member close to and away from each other based on a detection result of the front / rear limit detecting means, and an ophthalmologic apparatus main body for the gantry. The upper and lower limit detecting means for detecting that the upper and lower slides have reached the limit position, and the relative position between the mount and the face receiving member is moved in the upper and lower direction based on the detection result of the upper and lower limit detecting means. A vertical drive mechanism, a left and right limit detecting means for detecting that the left and right sliding of the ophthalmic instrument main body with respect to the gantry has reached a limit position, and the pedestal and the face based on the detection result of the left and right limit detecting means. An ophthalmologic apparatus comprising: a left-right direction drive mechanism that moves the relative position to the receiving member in the left-right direction.