JP2003210404A - Ophthalmologic instrument - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To control a drive for smoothly aligning an optometry part by a joystick after driving the optometry part by drive command means except for the joystick, in an ophthalmologic instrument electrically driving the optometry part by the operation of the joystick. <P>SOLUTION: This ophthalmologic instrument is provided with detecting means detecting the inclination direction and angle of the joystick, drive means electrically driving the optometry part, and second drive command means commanding the drive of the optometry part except for the joystick. This instrument is provided with control means controlling the driving quantity of the second drive command means by changing it from a reference moving distance based on the detection results of the inclination direction and angle of the joystick. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an ophthalmologic apparatus having a joystick as a means for aligning an eye to be examined.

[0002]

2. Description of the Related Art Conventionally, in an ophthalmologic apparatus, a base on which a face of a subject is placed, a sliding base that slides back and forth and right and left on the base, and the sliding base It is composed of an optometry part that is placed on the slide table and can be moved in the vertical direction, and a joystick provided on the slide table allows an examiner who is the operator to move the slide table back and forth on the base table. By moving the joystick to the left and right and rotating the joystick to move the optometry part up and down by using a screw mechanism etc., the optical axis alignment and focus of the optometry part We are making adjustments.

At this time, the joystick is tilted about the contact point with the base to slightly move the slide base back and forth and left and right, and by sliding on the base, the joystick is greatly moved back and forth and left and right. It is composed of a mechanical structure capable of moving coarse movement.

In response to such an operation mechanism for moving the optometry section by a mechanical joystick, an ophthalmologic apparatus has recently come out that is electrically driven by a motor and a screw feeding mechanism, for example, Japanese Patent Laid-Open No. 8-126611. In the publication, there is proposed a device in which a tilt angle detecting device is provided on a joystick to electrically drive an optometry unit from the tilt angle of the joystick.

In such an electrically driven ophthalmologic apparatus, movement of one eye of the examinee to the other eye, for example, measurement of the right eye followed by measurement of the left eye of the other eye is performed. For the movement, in addition to the movement instruction with the joystick that is usually used for alignment, there is a switch for left and right switching, and it is proposed that by pressing that switch, it moves to the left eye side for a predetermined distance. ing.

[0006]

However, in the above-mentioned conventional example, the joystick is used to move to the opposite eye side by a predetermined distance regardless of the state of the joystick when the left / right selector switch is pressed. In some cases, there was almost no range where the joystick could be used for fine adjustment, and it was necessary to move the optometry unit with the joystick once and then realign it.

Further, such a problem is not limited to the push-button operation of the left / right changeover switch, but also when the power is turned on when the optometry unit is set to the initial position corresponding to the standard position of the eye to be inspected, or when one examinee This could also be a problem when the measurement is completed and it is necessary to return to the initial position for the next subject.

[0008]

In order to solve the above problems, in the ophthalmologic apparatus of the invention according to the present application, (1)
When moving the optometry unit by the second movement instruction means such as the above-mentioned left / right changeover switch, the tilt direction and the tilt angle of the joystick which is the first movement instruction means are detected, and based on the detection result, The control means for controlling the movement of the optometry unit by the second movement instruction means is provided.

(2) The control means calculates the drive distance of the optometry unit after pushing the left / right changeover switch as the second movement instructing means in consideration of the tilt direction and tilt angle of the joystick, and performs drive control.

(3) The above-mentioned control means controls the drive of the optometry unit after the left / right selector switch push button as the second movement instruction means not from the tilt direction / tilt angle of the joystick immediately before the left / right selector switch push button Drive control is performed by calculating from the position of the optometry unit when the measurement is completed and the tilt direction and tilt angle of the joystick at that time.

(4) The control means calculates the movement distance of the optometry unit as the second movement instructing means after the power is turned on in consideration of the tilt direction and tilt angle of the joystick, and performs drive control.

[0012]

1 is a block diagram of an optometry apparatus to which a first embodiment of the present proposal is applied.

The exterior cover 1 of the apparatus is provided with a forehead support 2 on which the subject contacts his forehead, and a chin rest 3 on which the chin of the subject is placed.

The examinee brings his forehead into contact with the forehead rest 2, and the chin rests his chin on the chin rest 3. This is the front view of this optometry apparatus seen from the examinee's viewing window shown in FIG. Look into the interior with both eyes on 4R and 4L.

The depression 1a is a recess for avoiding the nose of the subject so that the nose of the subject does not hit the device when the subject looks inside.

Inside the exterior cover 1 is provided an optometry unit 5 which is driven by a drive mechanism, which will be described later, to be aligned in the front, rear, left, right, up and down with respect to the subject.

The optometry unit 5 is, for example, an optical system for measuring the eye refractive power and corneal shape of the subject's eye, but since the configuration of the present invention is not directly related to the gist of the invention, its detailed description is omitted. To do.

The optometry unit 5 is also provided with an optical system for picking up an image of the anterior segment of the subject's eye and displaying it on a display device 32 described later.

A joint member 6 with a feed nut is installed on the bottom surface of the optometry unit 5 and is screwed to a feed screw 7.

One end 7a of the feed screw 7 and the output shaft 9a of the drive motor 9 are connected by a coupling 10.

The drive motor 9 is fixed to the stage base 8 and the optometry unit 5 is rotated by the rotation of the drive motor 9.
Is configured to be driven with respect to the stage base 8 so as to move toward and away from the eye to be inspected.

On the lower surface of the stage base 8, a joint member 1 having a feed nut portion 11a screwed onto the feed screw 12 is provided.
1 is fixed.

Lower end 12a of feed screw 12 and drive motor 1
The four output shafts 14a are connected by a coupling 15.

The drive motor 14 is fixed to the stage base 13. The feed screw 12 and the joint member 11 that is screwed into the feed screw 12 when the drive motor 14 rotates are used to install the optometry unit 5 and the drive motor 9. The existing stage base 8 can be driven up and down.

The stage base 13 and the joint member 11
In between, a compression spring 16 is provided in order to reduce the load on the drive motor 14 due to the weight of the stage table 8 on which the optometry unit 5 and the drive motor 9 are installed, and the joint member 11.

The guide rod 17 installed on the lower surface of the stage base 8 is a guide groove portion 1 provided in a part of the stage base 13.
It is fitted in 3a and works so that the optometry unit 5 and the stage base 8 do not rotate due to the rotation of the drive motor 14.

The stage base 18 has the stage base 13 mounted thereon, and on its lower surface, guide portions 18a and 18b into which guide rods 19 and 20 are fitted, and a feed nut portion 18c to be screwed with a feed screw 21 are provided. There is.

The guide rods 19 and 20 are attached to the mounting portion 22 of the base 22 in parallel with the width direction of the eye to be examined (perpendicular to the paper surface).
It is fixed to a.

The feed screw 21 is also connected to a drive motor 36 (not shown) by a coupling (not shown) like the feed screws 7 and 12 described above.

The drive motor 36 is fixed to the mounting portion 22a of the base 22 like the drive motors 9 and 14 described above.

That is, as described above, by the rotation of the drive motors 9, 14, 25, the optometry unit 5 is driven to the front, rear, left, right and up and down to be aligned with the subject.

The chin rest 3 on which the subject places his chin is
The jaw support column 23 has a screw part 23a for vertically driving inside thereof.
Is provided, the threaded rod 24 that is screwed into the threaded portion 23a, the lower end 24a thereof, and the output shaft 25 of the drive motor 25.
a is connected by a coupling 26.

The drive motor 25 is mounted on the base 22,
It is fixedly attached via a mounting plate 27.

With the above construction, the rotation of the drive motor 25 drives the chin rest 3 up and down to assist in the alignment of the eye to be examined.

On the surface indicated by the arrow 28, the operation panel section having the configuration of FIG. 3 is installed.

Reference numeral 28a denotes a print switch for outputting the measurement result to the printer 34 installed in the lower part of the operation unit 28.

Reference numerals 28b and 28c are vertical drive switches for the chin rest 3. The chin rest 3 is raised by pushing 28b, and the chin rest 3 is lowered by pushing 28c.

Reference numeral 28d is a left / right selector switch.

When the optometry unit 5 is on the left eye side of the subject, when this switch is pressed, the optometry unit 5 moves to the right eye side of the opposite eye.

The amount of movement is 60 which is a general eye width value.
The joystick 29 will be described later with reference to mm.
The amount of movement varies depending on the state.

Further, 29 is a joystick device as an instructing means for instructing a driving direction and a moving amount of the optometry unit 5 for driving the optometry unit 5 back and forth, left and right, and up and down with respect to the subject's eye. Joystick device 29
The external view of is shown.

The operator, the operator, holds the operating rod 40,
By inclining the operation rod 40 in the F and B directions indicated by the arrow, the eye examination unit 5 is operated so as to move closer to and away from the eye to be inspected, and by inclining the operation rod 40 in the R and L directions indicated by the arrow, The optometry unit 5 is operated so as to move in the left-right width direction of the eye to be examined, and the operation rod 40 is rotated in the U and D directions indicated by the arrows so that the optometry unit 5 is operated so as to move in the vertical direction.

Reference numeral 41 denotes a key top, which is a key top of a switch for instructing the optometry unit 5 to start measurement / imaging of the subject's eye after the joystick device 29 completes the positioning and focusing of the subject's eye and the optometry unit 5. Is.

In order to explain the structure of the joystick device 29, the joystick device 29 will be referred to as arrow R in FIG.
A cross-sectional view cut in the L direction is shown in FIG.

In FIG. 5, the operating rod 40 is a bearing 4
5, the bearing 45 is fixed to the operating rod shaft 42 by the retaining ring 43 via the spacer 44.

Therefore, the operating rod 40 has a structure rotatable with respect to the operating rod shaft 42.

A button 41 is fitted in the upper opening of the operating rod 40, and the button 41 is integrally formed with one end of a shaft 47. A rotation stop shaft 48 penetrates the shaft 47 near the bottom of the button 41. ing.

FIG. 6 shows a sectional view of the position shown by the broken line 40a.

Since the operation rod 40 is provided with the groove 40b and the detent shaft 48 is fitted in the groove 40b, the rotation of the operation rod 40 causes the shaft 47 to be rotated by the detent shaft 48. There is.

Further, when the button 41 is pressed, the anti-rotation shaft 48 is a groove that moves downward along the groove 40b.

The spring 49 is arranged between the retaining ring 50 attached to the shaft 47 and the retaining ring 46 described above, and
It is provided to push the button 41 and the shaft 47 upward when is not pressed.

The shaft 47 is fitted inside the operating rod shaft 42 so that it can rotate and move up and down with respect to the operating rod shaft 42.

The lower end of the shaft 47 is joined to the input shaft 54a of the rotary encoder 54 by set screws 52 and 53 and a shaft joint 51.

The rotary encoder 54 is a component that detects the rotation angle of the input shaft 54a and has a switch function by pushing the input shaft 54a in the axial direction. The angle detection method is a non-contact optical type. Those which are commercially available, such as those utilizing resistance change and the like, are not described here.

The rotary encoder 54 is a washer 55,
The encoder body is fixed to a mounting plate 57 by a nut 56 so as not to rotate or move.
7 is attached to the sleeve 59 by screws 58.

The sleeve 59 is fixed to the lower end of the operating rod shaft 42 by a set screw 60.

With the above-described structure, the rotation angle of the shaft 47 rotating with respect to the operating rod shaft 42 can be determined by the rotary encoder 5.
4 can be detected and the shaft 47 can move up and down inside the operating rod shaft 42, so that the switch of the rotary encoder 54 can be turned on / off by pressing the button 41.

As described above, the shaft 47, which is rotatable and slidable inside the operating rod shaft 42, is provided, and the input portion of the detection component (the input shaft of the encoder) is connected to the end of the shaft 47, thereby providing a simple structure. It is a structure that can deal with problems such as the twisting of the cable of the detection component that often occurs in the rotating part.

The operating rod shaft 42 has a pin 6 as shown in FIG.
Since it is fitted in the groove 61a of the rotary shaft 61 by the shafts 9, 70 and supported by the rotary shaft 61, the operating rod 4 is moved in the direction orthogonal to the arrows R and L, that is, in the directions of the arrows F and B perpendicular to the paper surface.
By tilting 0, the rotary shaft 61 can be rotated in the directions of arrows F and B.

One end of the rotary shaft 61 is fitted in a hole provided in the case 62 so that it does not come off from the hole by the retaining ring 66, and the rotary shaft 61 is pushed rightward in the drawing with an appropriate pressing force to the case 62. The flange portion 61b of the rotary shaft 61 is fixed so as to generate an appropriate frictional force.

At the other end, as shown in the figure, an input shaft 64a of a potentiometer 64 is fitted and the set screw 63
Is connected to the rotary shaft 61 by.

Unlike the rotary encoder 54, the potentiometer 64 is an angle detecting component that only detects a rotation angle, and outputs a change in the rotation angle as a resistance value change, and is generally commercially available.

Since the potentiometer 64 is fixed to the case 62 by the nut 65 as shown in the figure, the tilt angle of the operating rod 40 in the F and B directions can be detected as the rotation angle of the rotary shaft 61. There is.

Further, as shown in the figure, one end of the rotary shaft 61 is
The torsion coil spring 67 is fitted and the spring pressing plate 6
8 is fixed to the rotating shaft 61.

The functions of the torsion coil spring 67 and the spring pressing plate 68 are shown in FIG.

FIG. 7 is a view of the torsion coil spring 67 and the spring pressing plate 68 as seen from the direction of the axis of the rotary shaft 61.
(A) shows a state in which the operating rod shaft 42 stands vertically.

FIG. 7B shows a state in which the operating rod shaft 42 is tilted by 20 ° in the direction of arrow F.

From the state shown in FIG. 7A to the state shown in FIG. 7B, until the operating rod shaft 42 is tilted from 0 ° to 20 °,
The torsion coil spring 67 is pressed by the protruding portion 62a of the case 62 so as not to spread, and the actuator portion 68a of the spring pressing plate 68 is held by the torsion coil spring 6.
Since 7 is not touched, the operating rod shaft 42 can be maintained in the inclined position (angle of 0 to 20 °) due to the friction between the flange portion 61b of the rotary shaft 61 and the case 62 described above.

(C) shows the state when the operating rod shaft 42 is tilted further in the direction of arrow F beyond 20 ° in (B).

From the state of (B) to the state of (C), that is, when the operating rod shaft 42 is tilted from 20 ° to 35 °, the actuator portion 68a of the spring pressing plate 68 rotates the rotating shaft 61 and the torsion coil spring 67. When the operator releases the force from the operating rod 40 to incline the operating rod shaft 42 in the direction indicated by the arrow F, the torsion coil spring 67 causes the spring force of the torsion coil spring 67 (B). It has a structure that tries to return to the state of.

Since the above-mentioned angle of 20 ° depends on the positional relationship between the actuator portion 68a of the spring pressing plate 68 and the protrusion 62a of the case 62, this angle of 20 ° can be set in advance, and the operator can operate the operating rod 40. After tilting, the range in which the state is kept tilted at that place even if the hand is released from the operating rod 40, and the range in which the tilt is returned by the torsion coil spring 67 when the hand is released from the operating rod 40 are set. It has a structure that allows it.

FIG. 8 shows the joystick device 2 cut in the direction perpendicular to the plane of FIG. 5, that is, in the directions of arrows F and B.
9 is a sectional configuration diagram of FIG.

In this sectional view, the operating rod shaft 42 is fitted in the groove 71a of the rotating plate 71 instead of the rotating shaft 61 shown in FIG. 5, and the operating rod shaft 42 is in the direction perpendicular to the paper surface, that is, in the directions of arrows R and L. When tilted, the operating rod shaft 42 will
Rotate and tilt around the axes of 9,70. Due to the tilting of the operation rod shaft 42, the rotary plate 71 is fitted into the hole of the case 62,
It rotates about the supported rotating shaft 71b.

A rotary shaft 73 is connected to the other end of the rotary plate 71 by a screw 72, and the rotary shaft 73 also rotates as the rotary plate 71 rotates.

When the rotary plate 71 is fixed to the rotary shaft 73 by the screws 72, the case 62 and the flange portion 73a of the rotary shaft 73 and the rotary plate 71 and the case 62 are pressed with an appropriate pressing force.
Are fixed so that they come into contact with each other and generate a frictional force.

A potentiometer 6 is attached to the rotary shaft 73.
An input shaft 75a of a potentiometer 75 similar to that of No. 4 is fitted and connected to a rotary shaft 73 by a set screw 74. Rotation of the rotary shaft 73, that is, the operating rod shaft 42
The input shaft 75a of the potentiometer 75 rotates in accordance with the tilting movement of the potentiometer 75, so that the potentiometer 75 can detect the tilt angle of the operating rod shaft 42.

Reference numeral 76 is a nut for fixing the potentiometer 75 to the case 62.

The torsion coil spring 77 and the spring pressing plate 78 are members having the same functions as the torsion coil spring 67 and the spring pressing plate 68 of FIG. 5, and the protrusion 62b of the case 62 is shown in FIG.
Since it is a protrusion that has the same function as the protrusion 62a of FIG. 8, the operator can operate up to a predetermined tilt angle of 20 ° in the direction perpendicular to the paper surface of FIG. Even if the operator releases his / her hand from the operating rod 40 after tilting the operating rod 40, the frictional force between the rotating plate 71 and the case 62 and the flange portion 73a of the rotating shaft 73 and the case 62 keeps tilting at that position. When the angle exceeds 20 °, when the hand is released from the operating rod 40, the torsion coil spring 77 returns the inclination.

Reference numeral 31 is a monitor case, in which a display device 32 such as a liquid crystal monitor is housed so as to display an anterior ocular segment image of the eye to be inspected.

A fulcrum shaft 31a fitted into a hole (not shown) of the outer cover 1 is formed on the side surface of the monitor case 31, and the monitor case 31 is tilted about this shaft in the direction of the arrow. It can be fixed at a position where the examiner can easily see it.

Reference numeral 33 is a power source for supplying electric power to the apparatus of this embodiment, which is installed in the lower portion of the apparatus.

FIG. 9 is a block diagram showing the relationship between the control unit for controlling the optometry apparatus of this embodiment and each device.

Reference numeral 35 denotes a drive motor for moving the optometry unit 5 of the optometry apparatus described above and a printer 34 for measuring results.
It is a control unit that controls printing, etc., and includes a microprocessor and a ROM that stores programs, an interface for peripheral devices, and the like.

Drive motors 9, 14, 36 for driving the optometry unit 5 in the up / down / left / right direction and in the front / back direction with respect to the eye to be inspected are connected to the control section 35 via a motor driver (not shown). It controls their drive.

Further, the print switch 28a mounted on the operation panel 28 and the chin rest vertical movement switch 28
b, 28c and a left / right changeover switch 28d are connected, and the signals of these switches are used to drive and control the connected chin rest driving motor 25, to control printing to the printer 34, and to control the optometry unit 5. Driving in the left-right direction.

Further, the video signal from the image pickup device for observing the anterior segment of the eye to be inspected provided in the optometry unit 5 is subjected to processing such as mixing of characters and marks to the display device 32, and therefore control is performed. The unit 35, the display device 32, and the optometry unit 5 are connected to each other.

The output of the potentiometer 64, which is the output of the forward and backward operation of the joystick device 29, is connected to the control unit 35 via the A / D converter 80. From the output result, the control unit 35 outputs the motor as described later. 9 is driven and controlled.

The output of the potentiometer 75, which is the output of the left-right operation of the joystick device 29, is connected to the control unit 35 via the A / D converter 81. From the output result, the control unit 35 outputs the motor as described later. 36 is driven and controlled.

The output of the rotation angle of the rotary encoder 54, which is the output of the rotation operation of the joystick device 29, is also connected to the control unit 35 via the A / D converter 82, and the control unit 35 outputs the output result. The motor 14 is driven to control the vertical drive of the optometry unit 5, while the rotary encoder 54 is operated by operating the switch of the button 41.
Also, the measurement operation of the optometry unit 5 is controlled by detecting the output from the.

FIG. 10 shows the relationship between the change in the resistance value R output from the potentiometer 75 and the tilt angle θ of the joystick in the left-right direction.

In this embodiment, the resistance value R is from R2 to R3.
When the tilt angle of the joystick is between −20 ° and + 20 °, the movement of the optometry unit 5 with respect to the operation amount of the joystick is position controlled.

That is, the tilt angle of the joystick in the front-rear direction and the movement amount x of the optometry unit 5 in the front-rear direction shown in FIG. 11 are such that the joystick stands vertically between the tilt angles of -20 ° to + 20 °. The optometry unit 5 from -6 mm to +6 mm in proportion to the tilt angle based on °
The control unit 35 drives the motor 36 so that the motor moves left and right.

Resistance values R are R1 to R2 and R3 to R4
When the tilt angle of the joystick is between −35 ° and −20 ° and between + 20 ° and + 35 °, the movement of the optometry unit 5 with respect to the operation amount of the joystick is speed controlled.

That is, the tilt angle of the joystick in the left-right direction and the moving speed Vx of the optometry unit 5 in the left-right direction shown in FIG. 12 remain tilted at an angle of more than −20 ° and −35 °. Then, it continues to move at a speed of 15 mm / sec in the tilted direction and exceeds + 20 ° +
The control unit 35 drives the motor 36 so that if the tilting angle is maintained at an angle of 35 °, the tilting direction moves at a speed of 15 mm / sec.

FIG. 13 is a diagram showing the movement of the anterior segment image of the subject's eye displayed on the display device 32.

The anterior ocular segment image of the eye to be inspected is projected on the display device 32 in the range of about 16 mm in the lateral direction, and the joystick device 29 is operated so that the center Tc of the eye to be inspected falls within the alignment mark M. The optometry unit 5 is moved.

As shown in FIG. 13A, when the center Tc of the eye to be inspected and the alignment mark M are only slightly apart from each other, it is desired to perform delicate positioning with the joystick, so that the proportion is proportional to the operation amount of the joystick. The control of moving the anterior segment image displayed on the display device is better in operability because the tilt angle of the joystick may be returned by the excessive distance even when the alignment position is excessively excessive.

When the center Tc of the eye to be inspected is largely separated from the alignment mark M as in the case of FIG. 13B, it is desired to quickly move the center Tc of the eye to be in the vicinity of the alignment mark M. In this case, the joystick is moved in the direction in which the joystick is tilted at a constant speed (15 mm / sec) by continuing to tilt the joystick beyond 20 ° against the spring force, so that quick operation is possible.

When the center Tc of the eye to be inspected reaches the vicinity of the alignment mark M as shown in FIG. 13A, the force for tilting the joystick is removed and the tilt angle of the joystick is set to 20.
° If you return it to a position below, the control method will shift to position control, allowing for delicate alignment operations.

The control method for the operation of the joystick described above is the same for the operation in the front-rear direction.
When the optometry unit 5 is already near the best focus position for focus adjustment and you want to perform fine focus adjustment, the position corresponding to the tilt angle of the joystick within the range of -20 ° to + 20 ° where the friction force of the joystick acts. Control
When the focus is greatly deviated, the force is continuously applied to the joystick within the range where the spring force exceeding 20 ° acts, and the focus is adjusted by the speed control.

With respect to the vertical operation, the height in the vertical direction is substantially constant even if the eye to be inspected changes. Therefore, the position control as described above is performed with respect to the rotational operation of the joystick.
The speed control is not switched, and the movement amount control is performed to move the optometry unit 5 by a predetermined distance in proportion to the rotation angle of the joystick. However, when the joystick is tilted to the tilt angle for performing the joystick speed control described above, The spring force acts on the joystick, and there is a risk that the operating rod 40 will be mistakenly turned by the examiner in order to maintain its posture, so the joystick is controlled by the control unit 35 to control the speed. In the range of 1, the means for ignoring the output of the rotary encoder 54 for detecting the rotation angle of the joystick and prohibiting the vertical movement of the optometry unit 5 is included.

Further, in the push button operation of the key top 41 of the switch provided on the upper end of the joystick, the measurement during the movement in the coarse movement operation is caused by the operator's operation error, and in order to prevent the unnecessary measurement operation. , If the joystick is within the speed control range, the controller 35 displays the key top 4
Rotary encoder 5 to detect switch operation 1
Means for prohibiting the measurement operation of the optometry unit 5 by ignoring the output of 4 is also included.

The procedure of measurement in the optometry apparatus of this embodiment having the above-mentioned configuration will be described below.

When the operator turns on a power switch (not shown), the optometry unit 5 of this apparatus has a general eye width of 64 mm.
Half of the distance is automatically moved to the right eye direction of the eye to be inspected and waits until the start of measurement.

After that, when the subject places his or her chin on the chin rest 3 and stabilizes his or her face on the device, at least a part of the subject's eye is displayed on the monitor, so the operator uses the joystick 29. The eye to be inspected and the eye examination unit 5 are aligned by operating as described above, and after the alignment is completed, the key top 41 is pressed to measure the right eye a desired number of times.

After the measurement of the right eye is completed, the operator pushes the left / right changeover switch on the operation panel section 28 to move the optometry unit 5 to the left eye side of the opposite eye.

The optometry unit 5 is set so as to move from the measurement position of the right eye to the left eye side by 64 mm with a standard eye width of 64 mm as a reference.
When the joystick 29 is tilted from the vertical position when is pressed, the control unit 35 performs drive control so as to move the optometry unit 5 by adjusting the movement amount to 64 mm by the distance corresponding to the tilt angle.

FIG. 14 is a diagram for explaining the above-mentioned operation, and the optometry unit 5 looking at this apparatus from the monitor 32 side.
It is a figure showing the relationship of the joystick 29.

In FIG. 14, the optometry unit 5 is at the position 5 indicated by the solid line when the measurement of the right eye of the subject is completed. After the measurement of the right eye is completed, the examiner pushes the left / right changeover switch 28d to move the optometry unit 5 to the left eye side in order to measure the left eye.

When the left / right selector switch 28d is pressed, if the joystick 29 is standing vertically, which is the neutral position (position 2 of the solid line showing the joystick 29).
9), the optometry unit 5 pushes the left / right selector switch 28d, and then moves to the left eye side (rightward in the figure) by 64 mm from the position at the end of the right eye measurement as shown by the alternate long and short dash line 5 '. The control unit 35 performs drive control so as to stand by for the measurement of the left eye.

At the end of the right eye measurement, the joystick 29 moves to the right eye side by 20 ° as shown by the broken line position 29 ″ (to the left in the figure).
If the left / right selector switch 28d is pressed while tilted to
The control unit 35 performs drive control so that the optometry unit 5 moves by adjusting the amount of movement by a distance corresponding to the tilt of the joystick from a predetermined moving distance of 64 mm.

In the case of the embodiment shown in FIG. 14, an inclination amount of 20 ° of the joystick 29 ″ gives a displacement amount of 6 mm from the neutral position from the graph of FIG. 64mm to 6
Move 58mm less by 58mm to the left eye side and move to the 5 ″ position.

If the inclination of the joystick 29 is not taken into consideration when the left / right selector switch 28d is pressed, the position of the left eye is almost in the center of the monitor 32 when the optometry unit 5 is moved to the left eye as shown in FIG. However, if you tilt the joystick 29 further to the left for fine adjustment, the tilt of the joystick 29 will be 20 °.
Since it will exceed the range, it will enter the area of speed control as shown in the graph of FIG.
Operability becomes poor.

As in this proposal, when the right eye measurement is completed, that is, when the right eye of the subject and the optometry unit 5 are moved from the state in which the positional relationship is right to the left eye side, the joystick 2
Considering the tilt amount of 9, when the joystick 29 is returned to the neutral position after moving the optometry unit 5 to the left eye side as shown in FIG. 16, the measurement optical axis of the optometry unit 5 is approximately at the center of the left eye. Therefore, the subsequent fine adjustment can be performed by the fine movement operation from the neutral position of the joystick 29, and the operability is good.

In the above description, in order to simplify the description,
It has been described that the examiner operates the joystick 29 after the right-eye measurement is completed or pushes the left / right selector switch 28d to move to the left-eye side without touching the joystick 29. If 29 is moved, the optometry unit 5 may not be located at a position where fine adjustment by the joystick 29 is easy when moving to the left eye side as described above, so the final measurement of the right eye was performed. The position of the optometry unit 5, the tilt direction and the tilt amount of the joystick 29 at that time are stored, and when the left / right selector switch 28d is pressed, the optometry unit 5 at the time of pressing the left / right selector switch 28d.
The movement amount is not calculated from the position of the joystick 29 and the amount of tilt of the joystick 29, but the optometry unit 5 at the time of the final measurement of the right eye.
If the control unit 35 drives and controls so that the optometry unit 5 is moved to the left eye side by adjusting the tilt amount of the joystick 29 at the end of the final measurement to 64 mm from the position of, the operability becomes better.

Further, in the above description, only the eye width direction of the eye to be inspected has been described, but the drive control of the eye examination unit 5 in the front-rear direction can be similarly performed.

That is, the longitudinal position of the optometry unit 5 at the end of the measurement of the right eye and the longitudinal tilt direction and amount of the joystick 29 at that time are stored, and the left / right changeover switch 28d is pressed to move to the left eye side. The control unit 35 controls the drive of the optometry unit 5 so that the position in focus when measuring the right eye is the position in the front-rear direction at the neutral position of the joystick (when standing vertically). In addition to improving the operability of the joystick 29 in the left-right direction (eye width direction), there is an effect that the operability in the front-back direction can be improved.

In the above description, the relationship between the state of the joystick 29 and the drive control of the optometry unit 5 by the push button operation of the left / right changeover switch 28d is described. However, not only the left / right changeover switch but also the pushbutton of the print switch 28a after the measurement is completed Drive control according to the state of the joystick 29 when moving the optometry unit 5 to the initial position, drive control depending on the state of the joystick 29 when the optometry unit 5 moves to the initial position when the power is turned on, and, for example, optometry The ophthalmologic apparatus of the above-described embodiment is provided with an initial position return switch for canceling the measurement in the middle of the operation and moving the optometry unit 5 to the initial position and waiting for the next subject. In the case of driving control of the initial position returning operation at the time of pushing the initial position returning switch, the optometry unit 5 is also moved. By initial position and a control unit 35 in consideration of the state at that time of the joystick 29 to be controls driving, it is possible to realize good operability similar to the effects described above.

[0119]

As described above, in the ophthalmologic apparatus of the invention according to the present application, (1) an optometry unit having an optical system for measuring, observing, and photographing the eye, and the optometry unit for the subject's eye A joystick mechanism having an operating rod as a first instructing device for instructing a driving direction and a driving amount, a detecting device for detecting a tilting direction and a tilting angle of the operating rod, and the optometry unit for the eye to be inspected. In the ophthalmologic apparatus having a second instructing means for instructing a driving direction and a driving amount, and a driving means for driving the optometry unit according to the detection result of the detecting means and a signal from the second instructing means, Based on the detection results of the tilt direction and tilt angle of the rod by the detection means, the drive amount of the optometry unit by the second drive instruction means is calculated, and the control means for performing drive control is provided. The position where the fine adjustment of the alignment by the joystick can be easily performed after moving the optometry unit by pressing the left / right selector switch that is the second drive instruction means or after moving the optometry unit to the initial position after the power is turned on. In addition, the optometry unit can be driven and controlled.

(2) The second instruction means is a left / right changeover switch for moving the eye examination unit from one eye of the subject to the other eye, and the left / right changeover switch moves the eye examination unit to the other eye. For the amount, the position of the optometry unit when the measurement immediately before pressing the left / right selector switch is completed, and the detection results of the tilt direction and tilt angle of the operation rod at that time are stored, and drive control is performed based on the detection results. Therefore, even if the positional relationship between the eye to be inspected and the optometry unit is shifted by moving the joystick before the measurement of the right eye is completed and the left / right selector switch is pressed, There is an effect that the optometry unit can be driven and controlled to a position where fine adjustment of alignment can be easily performed with the joystick after the movement.

[Brief description of drawings]

FIG. 1 is a cross-sectional configuration diagram of an ophthalmologic apparatus according to an embodiment of the present invention.

FIG. 2 is a front view of the eyepiece of the ophthalmologic apparatus according to the embodiment of the present invention.

FIG. 3 is an explanatory diagram of a layout of an operation panel 28.

FIG. 4 is an external view of a joystick device 29.

FIG. 5 is a cross-sectional configuration diagram of a joystick device 29.

FIG. 6 is a detailed sectional view of a joystick device 29.

FIG. 7 is an operation explanatory view of a torsion coil spring 67 and a spring pressing plate 68.

FIG. 8 is a cross-sectional configuration diagram of a joystick device 29.

FIG. 9 is a block configuration diagram of an ophthalmologic apparatus according to an embodiment of the present invention.

FIG. 10 is a graph showing the relationship between the tilt angle of the joystick and the output resistance value of the potentiometer 64.

FIG. 11 is a graph showing the relationship between the tilt angle of the joystick and the moving distance of the optometry unit 5.

FIG. 12 is a graph showing the relationship between the tilt angle of the joystick and the moving speed of the optometry unit 5.

FIG. 13 is a diagram showing the anterior ocular segment of the subject's eye displayed on the display device 32 during alignment.

FIG. 14 is an explanatory diagram of the tilted state of the joystick and the movement amount of the optometry unit 5.

FIG. 15 is a monitor screen of the anterior segment of the eye to be inspected when the present invention is not applied.

FIG. 16 is a monitor screen of the anterior segment of the eye to be inspected when the present invention is applied.

[Explanation of symbols]

5 Optometry unit 7,12,21 Lead screw 9, 14, 36 drive motor 28d Left and right selector switch 29 Joystick device 35 control unit 42 Operation rod shaft 47 axes 61 rotation axis 62a protrusion 67,77 torsion coil spring 68,78 Spring plate 71 rotating plate

Claims (4)

[Claims] 1. An optometry unit equipped with an optical system for measuring, observing, and photographing an eye, and an operation as a first instructing means for instructing a direction and a driving amount for driving the optometry unit with respect to an eye to be examined. A joystick mechanism including a rod, a detection unit that detects a tilt direction and a tilt angle of the operation rod, a second instruction unit that instructs a direction and a driving amount for driving the optometry unit with respect to an eye to be examined, and In the ophthalmologic apparatus having the detection result by the detection means and the drive means for driving the optometry unit by the signal from the second instruction means, based on the detection result by the detection means of the tilt direction and the tilt angle of the operation rod, A control unit that calculates the drive amount of the optometry unit by the second drive instruction unit and performs drive control,
An ophthalmic device having: 2. The ophthalmologic apparatus according to claim 1, wherein the second instructing means is a left / right changeover switch for moving the eye examination unit from one eye of the subject to the other eye. 3. The amount of movement of the optometry unit to the other eye by the left / right selector switch is determined by the position of the optometry unit when the measurement is completed immediately before pressing the left / right selector switch, and the tilting direction and tilting of the operating rod at that time. The ophthalmologic apparatus according to claim 2, wherein a detection result of the angle is stored and drive control is performed based on the detection result. 4. The second instruction means is a power switch, and when the power switch is moved to a predetermined position, drive control is performed based on a detection result of a tilt direction and a tilt angle of the operating rod. The ophthalmic device according to claim 1, characterized in that