JP3221709B2 - Ophthalmic equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an ophthalmologic apparatus which requires positioning of an eye to be examined and a measuring section, and more particularly to a mechanism for restricting a moving range of the measuring section and protecting a subject.

[0002]

2. Description of the Related Art A general apparatus for inspecting an eye to be inspected requires strict alignment between a measuring unit and the eye to be inspected. As the positioning mechanism, the subject's head is fixed to the head support fixed to the fixed base, and the movable table on which the measuring unit is mounted is operated by operating the joystick to move the front, rear, left and right on the fixed base. There is known a mechanism that moves horizontally. Such a mechanism secures a relatively wide range of movement in consideration of individual differences between subjects. However, in a device such as an objective lens in a fundus camera or a nozzle tip in a non-contact tonometer, the working distance with the cornea to be examined cannot be long, so that there is a high risk of collision between the device and the subject. In order to protect a subject, there has been proposed a mechanism for restricting the movement of the movable table in the direction of the subject's eye. Some non-contact tonometers include a mechanism for preventing the nozzle from colliding with the subject's nose when moving the measurement unit for measurement of the other eye after measurement of one eye.

[0003]

However, the mechanism for protecting the subject is complicated, and there is a problem that the apparatus is large and the cost is high. The present invention has been devised in view of the above-mentioned drawbacks of the conventional apparatus, and has as its technical object to provide an ophthalmologic apparatus capable of protecting a subject from collision with the apparatus with a compact mechanism.

[0004]

The present invention has the following configuration to achieve the above object. (1) An optometry unit having a radiating unit that emits a measurement light beam or the like toward an eye to be examined, and relatively moved with respect to the optometry unit .
That has a relative fixed base movable, in ophthalmic apparatus which performs alignment by moving back and forth and left and right eye examination unit, test
At the bottom of the eye unit, move the protrusion that projects toward the fixed base
Movably in the direction
Hold the position adjustment unit and the operation tool on the side of the optometry unit.
A pin having a pin and fitting into the hole or groove
The front and rear of the protrusion is
A lever for preventing movement in the direction, and a left side of the optometry unit.
On the fixed base to restrict the rightward movement to a substantially concave shape
And a recess provided on the surface, wherein the protrusion is
Limiting the movement of the optometry unit by abutting the wall
To select the position of the hole or groove to be fitted to the pin.
Change the position of the protrusion with respect to the optometry unit
It is characterized in that the movement limit of the optometric unit toward the user is changed . (2) In the ophthalmologic apparatus of (1), the lever is located on the upper side.
And push down the operation knob to
And the fitting between the hole and the groove is released.

[0005]

[0006]

[0007]

[0008]

[0009]

[0010]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a schematic external view of a non-contact tonometer according to one embodiment. In FIG. 1, reference numeral 1 denotes a fixed base, to which a head support 2 for fixing the subject's head is fixed. A measurement unit 3 is movable on the fixed base 1 back and forth and right and left. The measurement unit 3 is operated by a joystick 4. On the outer peripheral portion of the measurement unit 3, there are arranged an objective unit 5 having a nozzle for ejecting compressed air toward the subject's eye, and a knob 6 for adjusting a movement limit of the objective unit 5 so as to approach the subject's eye. I have. A television monitor (not shown) that displays an image of the anterior segment of the eye to be examined, a positioning index, and the like is arranged in the measurement unit 3 on the side facing the measurer. Since the intraocular pressure measurement mechanism itself has little relation to the present invention, its description is omitted.

FIG. 2 is a partial sectional view for explaining the structure of the moving mechanism of the measuring unit 3, and FIG. 3 is a sectional view taken on line AA of FIG.
In FIG. 2, the steel ball portion 10 of the joystick 4 is held by a holding member 11, and the joystick 4 can rotate around the center of the steel ball portion 10. The lower end 12 of the joystick 4 is rotatably held by a sliding plate 13. The materials are selected so that the frictional force between the sliding plate 13 and the friction plate 14 is larger than the frictional force between the sliding plate 13 of the sliding plate 13 and the base plate. Reference numeral 17 denotes a substrate for holding a position adjusting mechanism attached to the lower surface of the measuring unit 3, and a position regulating member 18 is supported on the substrate 17 so as to be movable in the front-rear direction. The position regulating member 18 has nine pin holes 19 at regular intervals in the front-rear direction. For the position regulating member 18, a groove-shaped member instead of the pin hole 19 is used.
May be provided . A stopper member 20 is fixed to the lower surface of the position regulating member 18. One end of the stopper member 20 protrudes downward, and a part of the protruding portion 21 enters into a concave portion 22 provided in the fixed base 1, thereby restricting a moving range thereof. FIG. 4 is a view of the concave portion 22 as viewed from above, and has a substantially concave shape. The planar shape of the recess may be as shown in FIG. The projecting portion 21 is configured such that its movement is hindered by the wall 23 of the concave portion 22 and cannot move to the position 24. A spring 25 urges the stopper member 20 toward the subject.

Since the limit of the movement range is determined by the relative positional relationship between the stopper member and the wall of the concave portion that comes into contact with the stopper member, the concave portion referred to in this specification is defined as the wall surface where the stopper member contacts and the inside of the wall. It generally means a space having a space in which the stopper member can move freely. Reference numeral 26 denotes a lever having a knob 6 at one end and a pin 27 fitted into the pin hole 19 at the other end. The lever 26 is pivotally supported by a support shaft 28 provided on the substrate 17. . Reference numeral 29 denotes a torsion spring for urging the lever 26 so as to repel when the knob 5 is pressed down. When the knob 6 is pushed down in this way, the pin 27 is lifted upward, and the position of the pin hole 19 into which the pin 27 is fitted can be changed.

Next, the operation of the apparatus of this embodiment will be described. First, the subject's head is fixed to the head support 2.
The measurer pushes down the knob 6, removes the pin 27 from the pin hole 19 of the position regulating member 18, operates the joystick 4 to move the measuring unit 3 in the front, rear, left and right directions, and moves the objective unit 5 slightly in advance from an appropriate position for measurement. It is positioned roughly on the subject side. Since the stopper member 20 is pulled toward the subject by the spring 25, the protruding portion 21 moves to a position where it comes into contact with the wall of the concave portion 22 on the side of the subject's eye. The measurer releases his / her hand from the knob 6 and fits the pin 27 into the pin hole 19 substantially corresponding to the position where the pin 27 is substantially positioned. When the above adjustment is completed, the examiner operates the joystick 4 while watching the anterior ocular segment image and the alignment index on the television monitor to perform alignment. After the alignment is completed, a predetermined measurement is performed. As described above, the measurement of one eye is completed, and the measurement unit 3 is moved to the other eye. At this time, even if the joystick 4 is operated to move in the left and right direction, the movement of the protrusion 21 of the stopper member 20 is restricted by the wall of the recess 22, and the objective unit 5 comes into contact with the nose of the subject. There is no.

In the above embodiment, the concave portion 22 is provided on the fixed base and the position adjusting mechanism is provided on the measuring unit. However, the embodiment of the present invention is not limited to this, and the concave portion 22 is provided on the measuring unit with the position adjusting mechanism. May be provided on a fixed base, and the stopper member may be fixed and the concave portion 22 may be movable. Such modifications are included in the present invention as long as the technical ideas are the same.

[0015]

According to the present invention, the subject can be protected from collision with the device by a compact mechanism.

[Brief description of the drawings]

FIG. 1 is a schematic external view of a non-contact tonometer according to an embodiment.

FIG. 2 is a partial cross-sectional view illustrating movement of an optometry unit on a fixed base.

FIG. 3 is a sectional view taken along line AA of FIG. 2;

FIG. 4 is an explanatory diagram showing a relationship between a concave portion of a fixed base and a projecting portion of a stopper member.

FIG. 5 is an explanatory diagram showing a modification of FIG. 4;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Fixed base 2 Head support part 3 Optometry unit 4 Joystick 5 Object part 6 Knob 18 Position control member 20 Stopper member 22 Concave part

Claims (2)

(57) [Claims] 1. A and optometric unit having a radiating means for radiating a measuring beam or the like towards the eye,該検eye unit relative
In an ophthalmologic apparatus that has a fixed base that can move relatively and moves the optometry unit back and forth and left and right, a projection that projects toward the fixed base on the lower surface of the optometry unit
To be movable in the front-rear direction, and
Is on the side of the optometry unit and the position adjustment unit with a groove
Hold the operation knob and insert the pin that fits into the hole or groove.
The protrusion is formed by fitting a pin into a hole or a groove.
A lever for preventing the front-rear movement of the
Fixed base to restrict the horizontal movement of the
A recess provided on the upper surface of the table, wherein the protrusion is
Movement of the optometry unit by contacting the wall of the recess
Limit the position of the hole or groove to be fitted to the pin.
To change the position of the protrusion with respect to the optometry unit.
Changing the movement limit of the optometry unit toward the subject
The ophthalmic apparatus according to claim. 2. The ophthalmologic apparatus according to claim 1, wherein said lever
− Is biased upward, and the operation knob is pressed down.
To release the pin from the hole or groove.
Ophthalmic equipment.