JPH042642Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a slit lamp microscope, and more particularly to a slit lamp microscope equipped with an illumination system for illuminating an eye to be examined.

[Conventional technology]

Traditionally, slit lamp microscopes have been used not only for observing the eye of a subject, but in recent years, there has been a tendency for slit lamp microscopes to be increasingly used for surgical purposes as well. As an example, slit lamp microscopes are being used that have a laser oscillator attached to the microscope section.

Figures 4 and 5 show the appearance of a conventional slit lamp microscope.
As shown in the figure. FIG. 4 is a plan view, and FIG. 5 is a side view.

In the figure, reference numeral 1 indicates a moving table, in which a left and right guide shaft 2 passes through the moving table 1 so as to be rotatable and slidable, a pinion 4 is coaxially attached to both ends of the moving table 1, and a table 7 is provided. One point of the sphere 6 integrated with the joystick 5 comes into contact with the friction plate 8, and together with the two pinions 4 described above, a three-point support structure is established for the table 7. It's summery. Therefore, when the joystick 5 is tilted to the left or right, the moving table 1 slides with respect to the left and right guide shafts 2, and the joystick 5 is tilted in the direction shown by the arrow X in FIG.
By tilting the pinion back and forth, the pinion 4 can roll on the rack and move in the direction shown by the arrow Y in the figure. By tilting the joystick 5 not only in the above-mentioned front, rear, left, and right directions, but also in any direction, it can be moved in the corresponding direction. 3 is a cover for the rack and pinion 4 (not shown).

A pivot 9 is provided at the front of the movable table 1 via an intermediate base 20, and a microscope arm 10 supporting a microscope 12 having an eyepiece 13 and a cylinder 11 incorporating a lamp house 17 and an illumination system are provided. They are each pivotably supported about the pivot.

The focal plane of the microscope 12 is adjusted to coincide with A', which is an extension of the axis of the pivot 9.

A chin rest support 18 is installed in the front part of the table 7, and a chin rest 15 that can be adjusted up and down and a forehead rest 14 equipped with a fixation light 16 are respectively attached to it.

The vertical adjustment knob 19 is configured so that by turning it, the intermediate base 20 can be moved in the vertical direction with respect to the movable table 1.

Therefore, the cylinder 11 incorporating the microscope 12 and the illumination system can move up and down together with the pivot 9 that is supported on the intermediate base 20.

To explain how to use such a conventional slit lamp microscope, in most cases, the tilt angle α' (Fig. 4) of the microscope 12 with respect to the eye to be examined is at or around 0, The angle β' at which the illumination system illuminates the eye to be examined is adjusted so as to eliminate corneal reflection from the lesioned area.

However, depending on the place and purpose of observation, for example,
When photographing a light section using slit illumination, in order to capture a wide range of the cornea, anterior chamber, and lens within the depth of focus of the microscope 12, it is necessary to It is said that it is best to set the angle (azimuth angle) between the emitted illumination light and the irradiation direction to approximately 90°. in this case,
In order to swing only the lighting system while keeping α' near 0°, the lamp house 17 will hit the chin rest support 18, making it impossible to secure an angle of 90°.To avoid this, the angle α' should be set to 20°.
It is turning at an angle of ~30°.

[Problem that the invention attempts to solve]

However, in such a case, if the aforementioned laser oscillator weighing several kilograms is mounted on the microscope section 12,
If the angle α' is rotated from around 0° to increase, the center of gravity will protrude from the triangle connecting the three points that support the moving platform 1, making it unstable and causing vibrations. However, in order to eliminate these problems, the device must become larger or more complex, which is a drawback.

Therefore, the present invention was made to solve these problems, and the purpose is to provide a slit lamp microscope that is stable in operation, has no fear of vibration, and is free from restrictions on use. That is.

[Means for solving problems]

In order to achieve the above object, the present invention provides a slit lamp microscope equipped with an illumination system for illuminating the eye to be examined, which can be adjusted forward, backward, left and right with respect to the eye to be examined.
A movable platform with a column fixed to the center thereof is provided, and an intermediate member whose rotation is regulated and is slidable in the vertical direction is fitted to the column, and the intermediate member has a pivot at one end thereof. A microscope arm having an arm arranged so that the focal point of a microscope for observing the eye to be examined is aligned with the axial extension line of the pivot is rotatably fitted, and the illumination system is rotatably supported on the pivot. At the same time, the microscope arm is arranged so that the center of gravity of the microscope and attached body substantially coincides with the center thereof.

[Effect]

According to such a configuration, the microscope arm, which supports approximately the center of gravity of the microscope and the attached body, is coaxially supported via the intermediate member to the column fixed approximately at the center of the moving table. Its center of gravity does not protrude from the triangle connecting the three points that support the movable table as described above, allowing stable and vibration-free operation.

〔Example〕

Hereinafter, the present invention will be described in detail based on embodiments shown in the drawings.

Figures 1 to 3 show the configuration of the slit lamp microscope according to the present invention. Figure 1 is a plan view, Figure 2 is a side view, and Figure 3 is a cross section of the main part including the support of the moving table. It is a diagram.

Reference numeral 21 denotes a moving table, in front of which a guide shaft 22 is installed through the moving table 21 so that it can rotate and slide in the axial direction.
4 are each coaxially attached to the table 27.
One of the spheres 26 integrated with the joystick 25 meshes with a rack gear (not shown) attached to the
The point contacts a friction plate 28 on the table 27, and together with the two pinions 24 mentioned above, a three-point support structure is formed for the table 27.

A cover 23 covers the pinion 24 and a rack (not shown) that meshes with the pinion 24.

The moving table 21 includes a support portion 21a and a cover 21b.
are integrally installed.

Further, a column 40 is fixed to the movable table 21 at approximately the center thereof with a mounting screw 47.
An intermediate member 41 is fitted into this support 40.

The intermediate member 41 has a helicoid 41a at its lower end.
and a bearing 4 coaxially with the axis B of the column 40.
It is screwed into a female threaded portion provided on a rotary cylinder 43 which is rotatably supported at 5.

Near the upper end of the helicoid 41a, a guide arm 41b projects laterally integrally with the column 40, and a guide shaft 42, which is once planted downward near its tip, is fixed to the movable table 21. It is held between the regulating plates 48. Therefore, the intermediate member 41
is restricted so that it cannot rotate relative to the support column 40, but is not restricted in the vertical direction.

A gear 43a is provided on the outer periphery of the rotating cylinder 43 described above, and is engaged with a gear 39a at the lower end of the vertical adjustment knob 39 via an idle gear 44 pivotally supported by a shaft 21C installed in the movable table 21. It's on.
The vertical adjustment knob 39 is provided with an opening 39b, which is pivotally supported by the support portion 21a, and at the same time a sphere 26 integral with the above-mentioned joystick 25 is loosely mounted inside.

Furthermore, the microscope arm 30 is coaxially fitted into the intermediate member 41 and is rotatable left and right about the support 40 . This rotation can be stopped by tightening the tightening screw 49 as necessary.

Above the microscope arm 30, an eyepiece 33 is provided.
A microscope 32 and a laser oscillator 50 are attached, and an arm 30a protrudes below the arm 30a substantially parallel to the optical axis of the microscope 32, and a lamp house 37 is connected to the lamp house 37 through a pivot 29 near the tip of the arm 30a.
The cylinder 31 incorporating the illumination system is located at the center of the pivot 29 (this coincides with the axis A parallel to the axis B mentioned above, and is the focal point of the microscope 32 adjusted so that the focal plane coincides with the eye E to be examined). ) is pivotably supported.

A balance spring 46 is disposed at the lower end of the intermediate member 41 to smooth its vertical movement.

A chin rest support 38 is installed in front of the table 27, and a chin rest 35 that can be adjusted up and down and a forehead rest 34 equipped with a fixation light 36 are respectively attached to it.

Next, the operation when operating the slit lamp microscope configured in this way will be described.

First, place the subject's face on the chin rest table 35 and the forehead rest 3.
4, and fix the eye E to be examined.

Next, while looking into the eye E through the eyepiece 33 with the examiner's eye D, the optical axis is swung around the axis B to set the optimum angle α, and the cylinder 31 is rotated around the axis A. , irradiates the eye E with illumination light.

At this time, the angle between the illumination light and the optical axis of the microscope 32, that is, the azimuth angle (α+β), can be ensured to be approximately 90°, and the center of gravity of the microscope 32 including the laser oscillator 50 is located at the center of the movable table 21. That is, axis B
Since it is located at the top, it does not protrude from the three-point support triangle mentioned above.

Therefore, there are no restrictions on the set angles α and α+β.

To align the optical axis of the microscope 32 with the height of the eye E, the vertical adjustment knob 39 is rotated in either the left or right direction, which causes the gear 43a to rotate via the idle gear 44, and the helicoid 41a to move up and down. .

Also, by tilting the joystick 25, the sphere 26 rolls on the friction plate 28, and the first
The microscope arm 3
0, the microscope 32 attached to it, the cylindrical body 31 that emits illumination light, etc. can be moved.

〔effect〕

As explained above, in the present invention, even if the illumination system is rotated from side to side, most of the weight is placed on the fixed axis located approximately in the center of the moving stage, as it is relatively light compared to the microscope section. The vibration caused by the lack of strength of the microscope arm has been resolved. At the same time, there are no restrictions on use, and as a result, the entire machine can be made smaller and easier to handle.

[Brief explanation of the drawing]

Fig. 1 is a plan view of the embodiment according to the present invention, Fig. 2 is a side view thereof, Fig. 3 is a cross-sectional view of the main part including the support of the moving platform according to the embodiment of the present invention, and Fig. 4 is a slit according to the conventional example. A plan view of the light microscope, and FIG. 5 is a side view thereof. 21...Moving table, 25...Joy station,
26... Sphere, 29... Pivot, 30... Microscope arm, 32... Microscope, 39... Vertical adjustment knob, 40... Support, 41... Intermediate member, 43...
Rotating tube, 50...laser oscillator.

Claims (1)

[Scope of Claim for Utility Model Registration] 1. A slit lamp microscope equipped with an illumination system for illuminating the eye to be examined, which is equipped with a movable table that can be adjusted forward, backward, left and right with respect to the eye to be examined, and has a column fixed approximately in the center. , a microscope in which an intermediate member whose rotation is regulated and is slidable in the vertical direction is fitted to the support, the intermediate member has a pivot at one end, and the eye to be examined is observed along an axial extension line of the pivot; A microscope arm is rotatably mounted on the microscope arm, and the illumination system is rotatably supported on the pivot. A slit lamp microscope characterized by being arranged so that its center of gravity almost coincides with its center. 2. The slit lamp microscope according to claim 1, wherein the attached body comprises a laser oscillator.