JPH0344162Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] The present invention is a suspension device for an optometry instrument. The present invention relates to a suspension device for an optometric instrument, particularly for use at the bedside, in which the optical axis of the optometrist is arranged.

[Prior art] As a mount device for an optometry instrument according to the prior art,
Except for special devices that are small and can be carried by hand, stationary tabletop mount devices for optometry instruments are common. This common optometry instrument mount device has
In order to face the optometry instrument whose optical axis is oriented horizontally,
The subject's face is fixed in an upright position on a forehead holder or chin rest provided on a face holder shaft fixed to a mount base, etc., and the position and posture of the optometry instrument relative to the subject's eyes are determined. I'm trying to adjust it. In this case, in order to align the optometry instrument with respect to the eye to be examined, an operating stand is provided that allows the optometry instrument to be moved up and down, forward and backward, left and right, and in addition, a TV camera is installed to observe the optometry instrument. When used, a TV monitor device or the like is mechanically or electrically connected to the operation stand.

FIG. 9 shows the external appearance of a conventional embodiment of a fundus camera using a TV camera for this type of observation.

In this fundus camera, a chin rest 4 and a forehead holder 5 for fixing the face of the subject 3 on the left end of the gantry base 2 are supported by a face holder shaft 6, and the other end on the gantry base 2 is supported by a face holder shaft 6. A horizontal movement table 9 for operating the fundus camera body 7 in the front, rear, left and right directions by means of a control bar 8 is installed via a linear motion rail 10 for front, rear, right and left movement.

A top and bottom handle 11, a top and bottom frame 12, and a top and bottom support 13 are installed on the horizontal movement table 9 to adjust the position of the fundus camera body 7 up and down, and the fundus camera body 7 is attached thereon. .

Further, an objective lens barrel 14 is attached to the fundus camera body 7 in a manner facing the eye 3 to be examined, and behind the optical axis of the objective lens incorporated therein is a lens barrel 14 for recording images. A film chamber 15 containing film is provided.

Further, a TV camera section 16 is attached above the same optical axis, and a TV monitor device 17 for observation is placed near the gantry base 2 and is oriented in a direction where the operator can observe it.

The optical path diagram of the fundus camera in the conventional example above is shown in the first diagram.
Shown in Figure 0.

Behind the objective lens 20, a perforated mirror 21, a focusing lens 22, an imaging lens 23, and a movable mirror 24 are arranged obliquely on the optical axis L1.
is disposed, and a film 25 is further disposed behind it.

Further, on the optical axis L2 bent by the movable mirror 24, there is a field lens 26 and an obliquely installed mirror 2.
7 is arranged, and on the optical axis L3 bent by this mirror 27, an imaging lens 28 for a TV camera,
An image sensor 29 is arranged.

From the objective lens 20 described above to the movable mirror 2
The image forming lens 28 for the TV camera via the position indicated by the solid line 4 constitutes an observation optical system for observing using the TV device together with the image pickup element 29.

Further, when the movable mirror 24 is retracted from the optical path of the optical axis L1 to the position indicated by the broken line, the film 2 is moved from the objective lens 20 to the imaging lens 23.
5 constitutes a photographing optical system.

On the other hand, the optical axis L1 passing through the center of the perforated mirror 21
On the optical axis L4 that intersects with the plane of the perforated mirror 21 and the optical axis L5 that is bent by the obliquely installed mirror 30, the illumination lamps 3 are arranged in the order of distance from the perforated mirror 21.
1. A condenser lens 32, a mirror 30, a flash lamp 33, a ring slit 34, a first relay lens 35, a reflection removal plate 36 having a black dot in the center to remove harmful reflected light, and a second relay lens 37. It is located.

From this illumination lamp 31 to the second relay lens 37
The optical system including the perforated mirror 21 and the objective lens 20 constitutes an illumination optical system for observation and photographing.

[Problem that the invention attempts to solve]

In many conventional tabletop optometry instruments, a chin rest or forehead holder is installed to position the subject's face horizontally opposite the optometry instrument. Since the eye examination is performed with the subject's eye fixed in a fixed position, the subject must sit up when placing his or her face in that position, and must also keep his or her upper body upright in order to be examined. It's difficult to do.

Therefore, there was a problem in that the conventional table-top ophthalmoscopy instrument could not be used on a patient lying supine on the bed, and a thorough examination could not be performed.

In order to be able to use this type of optometry device on a subject lying face up on a bed, a specially devised suspension device is required.
In particular, if it is desired to avoid forcing a supine subject into an unreasonable posture, the optometry instrument should be constructed so that it can move freely in each direction facing the subject's eye, and its operating section should be It is necessary to consider how easy it is for people to handle.

Furthermore, the operating pedestal section for controlling the optometry instrument in the vertical direction, front, back, left, and right horizontal directions needs to be installed as close to the eye to be examined as possible and in a position that is easy for the operator to handle.

Furthermore, in optometry instruments in which a TV camera is used for observation, it is necessary to consider the ease of use by the operator in the mounting position of the TV monitor device, etc.

Therefore, it is desirable that the above-mentioned operating units in particular be concentrated as much as possible at positions where they can be easily handled by the operator.

[Means for solving problems]

In order to solve these problems, this invention
In a suspension device for an optometry instrument, the optical axis of an objective lens is arranged in a direction extending vertically through a predetermined point on the subject's eye in a supine position, the center of which is an axis extending horizontally through a predetermined point on the optical axis. a pivot part for swinging the optometry instrument in a first direction; a vertically movable column holding a first support member supporting the pivot part;
A slide for holding an optometric instrument fitted in an arcuate guide segment that is swingable in a second direction perpendicular to the first direction via a second support member provided on one of the pivot parts. a member is provided, and the first
a first operating mechanism for swinging the optometric instrument in the first direction on the support member; and a second operating mechanism for swinging the optometric instrument in the second direction on the sliding member. We adopted a configuration that includes a mechanism.

Furthermore, the first operating mechanism and the second operating mechanism can each be configured to be electrically operated.

[Effect]

In such a configuration, the optometry instrument can be swung in mutually orthogonal planes about a predetermined point on the eye to be examined by means of the pivot portion and the arc-shaped guide segment, and the swiveling in two mutually orthogonal directions is controlled by the respective accompanying directions. The operating mechanism can be operated not only manually but also electrically with a switch located at an easy-to-operate position, increasing operability.

〔Example〕

The details of the present invention will be explained below with reference to the drawings.

Figure 1 shows a front view of the embodiment of the present invention, showing the overall configuration of the optometry instrument and the suspension device installed on the bedside, with the subject lying supine on the bed. This figure shows a side view of the vehicle, with the person in the center at the center.

The ophthalmometric instrument designated by reference numeral 40 in the figure is exemplified as a fundus camera using a TV camera of similar configuration to that illustrated in FIG.

Fundus camera body 4 which is the main part of optometric instrument 40
1 is placed facing the subject 42 lying supine on a bed 66, and an objective lens barrel 43 is located below the fundus camera body 41, and its optical axis L
A film chamber 44 for recording an image of the eye to be examined of a subject 42 is installed above the lens 1, and a TV camera section 45 for observation is further attached to the side of the optical axis L1.

As shown in FIG. 1, the optical axis L1 of the objective lens
Horizontal extension line H shown from a certain point P on the right of the figure
A pivot portion 46 is provided at an appropriate position on the top. An arcuate guide segment 48 having a center of curvature at the fixed point P is attached to one end of the pivot portion 46 via a second support member 47. This guide segment 48 is provided with a sliding member 4 via a plurality of guide rollers 71, which will be described later.
9 is slidably fitted, and further this sliding member 4
At 9, a fundus camera body 41 is held.

A first swing handle 90 (see FIG. 1) for swinging the fundus camera body 41 in the X1 direction shown in FIG. ), but also the sliding member 4
9 is attached with a second swing handle 76 for swinging in the X2 direction shown in FIG.

Therefore, since the fundus camera body 41 is slidably supported via the pivot portion 46,
In the direction indicated by 1, also the arcuate guide segment 4
8, it can be swung in the direction X2 in FIG. 1, which is orthogonal to the direction X1, using handles 90 and 76, respectively.

As described above, when the fixed point P is appropriately positioned on the subject 42, for example near the anterior segment, it becomes possible to perform eye examination from each direction centering on the anterior segment.

Here, the above-mentioned suspension device for the fundus camera body 41 is attached to the upper part of the upper and lower columns 54 so that the operator 70 can adjust the vertical position of the fundus camera body 41 by operating the upper and lower handles 53. This allows fine vertical alignment.

Further, the upper and lower frames 55 for holding the upper and lower columns 54 are arranged so that the operator can use the control lever 56
A horizontal movement stage 57 for adjusting the position of the fundus camera body 41 in the front, rear, left and right directions by operating the
It is fixed to the top surface of the , making it possible to perform minute positioning in the front, back, left, and right directions.

Further, the horizontal movement table 57 is attached to a mount base 59 via a linear movement rail 58 for longitudinal and lateral movement, and the above-mentioned fundus camera body 41, the first support member 50, the second support member 47, etc. A vertical coarse movement column 60 is installed so that the height can be adjusted to an appropriate height from the floor, including the suspension system including the suspension system and the operating frame from the control lever 56 to the frame base 59.
This column 60 is installed on top of the vertical coarse movement frame 6.
1, it is held so that it can move up and down.

On the other hand, a motor house 62 is attached to the lower part of the vertical coarse movement frame 61, and when the vertical coarse movement switch 63 is electrically operated, a motor (not shown) built inside is activated to move the vertical coarse movement column 60.
It is configured to move up and down.

The lower motor house 62 and the leg frame 64 integrated therewith are attached to keep the entire device stable, and furthermore, to allow the entire device to move coarsely or change its position on the floor in any direction. Moving wheels 65 are attached to the.

A TV monitor device 52 is attached to the upper part of the above-mentioned horizontal moving table 57 via a support member at a height and position that is easily visible to the operator.

Next, FIG. 3A shows a cross section taken along line aa' in FIG. 2, and FIG. 3B shows a cross section taken along line c-c' in FIG. 3A. In these figures, the sliding member 4 that fits into the arcuate guide segment 48 described above is shown.
9, the sliding member 49 has a plurality of guide rollers 71 arranged along the arc-shaped guide segment 4.
It is configured to be rotatably attached to the circular arc surface of 8 so as to be inscribed and circumscribed, and to slide and guide the sliding member 49 along the circular arc.

Further, an arcuate gear 72 is fixed to the arcuate guide segment 48, and a gear 73 integrated with a shaft 74 supported by a bearing 75 fixed to the side surface of the sliding member 49 meshes with this. The second swing handle 76 described above is attached to both ends of the shaft 74.

Therefore, by operating the swinging handle 76, the operator causes the gear 73 to roll on the arcuate gear 72, thereby moving the sliding member 49 that holds the fundus camera 41.
can be moved along the arc of the arc-shaped guide segment 48 to appropriately swing the fundus camera 42 in the X2 direction.

Next, FIG. 4A shows the bb' section in FIG. 2, FIG. 4B shows the d-d' section in FIG. 4A, and FIG. 4C shows the section along d-d' in FIG. The ee-e' cross section in A is shown.

Here, a swing shaft 81 holding the second support member 47 is rotatably attached to the first support member 50 via left and right bearings 82 forming the pivot portion 46, and the swing shaft 81 holds the second support member 47. On the opposite side of the second support member 47 fixed to the shaft 81, an arm member 83 having a long groove portion 84 at its tip is fixed. It is narrow and has a sliding contact.

The nut member 86 having the pin 85 described above has a female threaded portion that is threaded into the male threaded portion 87 of a shaft 88 that is fitted into the first support member 50 through a bearing 89. 1 swinging handle 90
are integrally attached. Therefore, this first
By operating the swinging handle 90, the male threaded portion 87 rotates, and the nut member 86 with the female threaded portion screwed thereto moves to the right or left along the male thread 87, and the nut member 87 rotates. Since the pin 85 implanted in the pin 86 also moves in the same way, the arm member 83 having the long groove 84 that slides on the pin 85 is swung, thereby moving the fundus camera 41 in the X1 direction [Fig. and FIG. 4B].

Here, the arm member 83 is connected to the fundus camera body 41.
When the swing shaft 81 rotates in the X1 direction due to all the loads applied to the optometry instrument 40 and the second support member 47 illustrated in , the moment of the position that gradually increases and changes, that is, the swing shaft It plays the role of reducing the torque of the handle 81 as a whole, making it easier to operate the handle 90, and allowing fine position adjustment.

In addition, in order to move the nut member 86 stably, the guide rail 91 may be attached to the male thread 87 in some cases.
Fixed in parallel with.

FIG. 5A shows another embodiment of the present invention, and FIG. 5B shows the bb' cross section in FIG.
Figure 5A shows the f-f' cross section, and Figure 5C shows the 5th cross section.
The cross-sections taken along line g-g' in Figure A are shown.

Here, as in the embodiment shown in FIG. 4, the swing shaft 10 holding the second support member 47 is
1 is rotatably attached to the first support member 50 via the left and right bearings 102 that constitute the pivot portion 46, and is on the opposite side of the second support member 47 fixed to the swing shaft 101. An arm member 103 having a long groove 104 at its tip is fixed to the arm member 103, and the long groove 104 narrows and slides a pin 105 implanted in a crank member 106.

Crank member 106 having the above pin 105
In this case, the shaft portion 107 is connected to the first
The worm wheel 10 is rotatably attached to the support member 50 of the shaft portion 107.
9 is attached to the worm wheel 109, and a worm portion 110 of a shaft 112 rotatably supported by a bearing 111 is engaged with the first support member 50. Handle 11
3 is installed.

Therefore, by operating the swing handle 113, the worm wheel 1 is moved through the worm 110.
09 and the crank member 10 integrated with it.
6 and further via the pin 105 to the arm member 10
3 to an appropriate position, the fundus camera 41 can be swung in the X1 direction.

The arm member 103 in this embodiment is configured to swing via the worm 110 and the worm wheel 109, so the arm member 103 is
As in the case of the arm member 83 in the embodiment shown in the figure, the pin 10 that plays a role of reducing the torque of the swing shaft 101 in general, but slides into the long groove 104.
Since the locus of No. 5 is circular, the driving torque of the crank member 106 by the handle 113 is minimum near the top dead center, but the moving speed is maximum, and the driving torque increases as the crank member 106 rotates to the right or left. increases and velocity decreases. Therefore, when the tangential direction on the circumference of the locus of the pin 105 reaches a point where the center of the swing shaft 101 matches, the crank member 106
The driving torque by the handle 113 becomes maximum, and the moving speed of the arm member 103 becomes minimum (0).

As described above, when the swing shaft 101 rotates in the X1 direction due to all the loads applied to the fundus camera body 41 and the like and the second support member 47, the torque of the shaft 101 increases gradually. Since the driving torque can be increased in a manner corresponding to this load, the operation of the handle 113 is always light and easy, and in particular, the fundus camera 41 is positioned inclined in the When the number of unstable elements increases relative to the direction, the swinging speed slows down, so fine position adjustments can be made more stably.

In FIG. 6, the swing handle 76 in the embodiment shown in FIG. 3B is operated manually, whereas the motor 7
It is electrically operated using joint part 7.
This is another embodiment in which the rotation of a motor 78 is transmitted to a gear 73 via a gear 73, and is a cross-sectional view taken along line c-c' in FIG. 3A.

FIG. 7 shows that the swing handle 90 in the embodiment shown in FIG.
2 is used to make it electric, and the joint part 9
This is another embodiment in which the rotation of the motor 92 is transmitted to the male screw 87 via the
This shows the e′ cross section.

In FIG. 8, the swing handle 113 of the embodiment shown in FIG. This is another embodiment in which the information is transmitted to the worm 110,
This is a cross section taken along line g-g' in FIG. 5A.

Motors 78 and 9 in each case above
Regarding the installation location of the switch, etc. for controlling the rotation of the 2,115, electrical wiring should be mainly considered, and it can be installed at any position on the operation stand, for example, a part of the first support member 50, or above and below. Any part of the frame 55, the control lever 56, the horizontal movement table 57, the gantry base 59,
It can also be installed anywhere in the vicinity.

Also, considering that the operator operates with his or her feet,
It becomes possible to install it in the motor house 62, the leg frame 64, or in a place near these where it is easy to operate.

Next, the operation of the device configured as described above will be explained.

When performing an eye examination on a subject 42 who is lying on his back, the entire apparatus is first moved to the side of the bed 66 via the moving wheels 65, so that the lens barrel 43 is approximately aligned with the predetermined upper part of the anterior eye of the subject 42. , operate the vertical coarse movement switch 63 to open the ophthalmoscopy instrument 40 (fundus camera 4).
1) Adjust the height. Next, the control lever 56 is operated to finely adjust the horizontal movement table 57 within the horizontal plane, and the vertical handle 53 is further finely adjusted in the vertical direction to move the fixed point P on the optical axis L1 to the subject 42. For example, it is set near the anterior segment of the eye.

In this state, the optometry instrument 40 rotates around the pivot axis of the pivot section 46, that is, around the fixed point P, at the first position.
can be swung in the direction X1 (shown in FIGS. 2 and 4B) by operating the swinging handle 90, and by operating the second swinging handle 76 via the sliding member 49, Since it can be swung in the direction of X2 along the arcuate guide segment 48,
Eye examination can be performed from each direction centering on the anterior segment of the eye, that is, centering on a fixed point P.

Further, other embodiments (Figs. 6, 7, 8)
) is applied, the motors 78, 92, 115 are operated by operating a switch (not shown).
can be rotated and each swing can be made by electric power instead of manual operation.

In each case, each eye examination state is observed by the TV monitor device 52, so it is possible to continue good eye examination work or observation work at all times.

〔effect〕

As explained above, in the device according to the present invention,
It is possible to move the ophthalmoscope in various directions while the patient is lying supine on the bedside without significantly changing the conventional method of operating the ophthalmoscope or using complicated and large equipment. At the same time, eye examination can be easily performed from various directions centering on a fixed point set on the eye to be examined, and an excellent effect with wide range of adaptability is exhibited.

[Brief explanation of the drawing]

Fig. 1 is a front view of the device according to the present invention for use with a supine subject, Fig. 2 is a side view, Fig. 3A is a sectional view taken along line a-a' in Fig. 2, and Fig. 3B is a Figure 3A
Figure 4A is a cross-sectional view taken along line b-b' in Figure 2, Figure 4B is a cross-sectional view taken along line d in Figure 4A.
-d' sectional view, Figure 4C is e- in Figure 4A.
e' sectional view, FIG. 5A is another embodiment of the present invention.
Figure 5B is a cross-sectional view taken along line bb' in Figure 5A, Figure 5C is a cross-sectional view taken along line g-g' in Figure 5A, and Figure 5C is a cross-sectional view taken along line g-g' in Figure 5A. Figure 6 is another embodiment of the present invention, and is a sectional view taken along line c-c' in Figure 3A. Figure 7 is another embodiment of the present invention, and is a sectional view taken along line ee' in Figure 4A. ,
FIG. 8 is a cross-sectional view taken along line g-g' of FIG. 5A showing another embodiment of the present invention, FIG. 9 is an external view of a conventional fundus camera, and FIG. 10 is a cross-sectional view of a conventional fundus camera. FIG. 2 is an optical path diagram of a conventional fundus camera. 40...Optometry instrument, 41...Fundus camera body,
46... Pivot part, 47... Second support member,
48...Circular guide segment, 49...Sliding member, 50...First support member, 53...Upper and lower handle, 54...Upper and lower support column, 71...Guide roller, 72...Circular arc gear, 73 ...Gear, 76...
...Second swinging handle, 81...Swinging shaft, 83...
... Arm member, 86 ... Nut member, 87 ... Male thread part, 90 ... First swing handle, 78, 9
2,115...Motor.

Claims (1)

[Claims for Utility Model Registration] In a suspension device for an optometry instrument in which an optical axis L1 of an objective lens is arranged in a direction extending vertically through a predetermined point P on the subject's eye in a supine posture, a predetermined point on the optical axis L1 a pivot section 46 for swinging the optometry instrument 40 in a first direction X1 centered on an axis H of an axis extending horizontally through P;
, a vertically movable column 54 that holds a first support member 50 that supports the pivot portion 46 , and a second support member 4 provided on one side of the pivot portion 46 .
A sliding member 49 is provided for holding an optometry instrument 40 fitted in an arc-shaped guide segment 48 which is swingable in a second direction X2 perpendicular to the first direction X1 through the first direction X1. A first operating mechanism for swinging the optometry instrument 40 in the first direction X1 is provided on the support member 50, and a first operating mechanism for swinging the optometry instrument 40 in the second direction X2 is provided on the sliding member 49. 1. A suspension device for an optometric instrument, characterized in that a second operating mechanism is provided for the operation.