JPS6064314A - Fine adjusting device of optical machine - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a fine adjustment device for an optical instrument that allows the main body of the optical instrument to be slightly moved forward, backward, left, right, and downward by tilting and rotating operations of an operating lever.

An example of this type of optical instrument is a fundus camera. In this fundus camera, it is necessary to align the optical axis of the lens of the camera body, which is the main body of the optical instrument, with the optical axis of the pupil of the subject's eye. It is mounted on a base (table) so that it can be moved and adjusted. Furthermore, this movement adjustment is performed by coarsely moving the camera body and then finely moving it.

By the way, such a device for finely moving the camera body in the front, back, left, right, and up and down directions, that is, a fine adjustment device, includes a slider placed on a base so as to be slidable, and a camera body mounted on the slider so as to be movable up and down. An operating lever is attached to this slider so that it can be tilted in any direction and rotated around the axis, and by tilting the operating lever, the slider can be slightly moved forward, backward, left, and right, and the operating lever can be rotated around the axis. It is conceivable that the camera body can be slightly moved up and down by operation.

On the other hand, in a fundus camera, the fundus is photographed after adjusting the movement of the camera body in two series, and it is desirable that this photographing be done quickly.

It turns out that in order to achieve this desire, it is sufficient to attach a switch for photographing to the operating lever.

However, since the operating lever is operated by tilting forward, backward, left, right, and rotating around its axis, if the switch and the electronic shutter circuit on the slider side are simply connected with a lead wire, the lead wire will be twisted and disconnected. Furthermore, if the switch and the electronic shutter circuit are connected via a brush or the like, there is a problem that durability is lacking.

Therefore, the present invention provides that even if a switch and an electronic circuit such as an electronic shutter circuit are connected by wiring such as a lead wire,
The object of the present invention is to provide a fine adjustment device for an optical instrument that prevents the wiring from being twisted and disconnected, allows highly durable connections, and allows fine movement of the optical instrument body in the same manner as before. be.

In order to achieve this object, the present invention includes a slider mounted on a base so as to be slidable, an optical instrument main body mounted on the slider so as to be movable up and down, and an operating lever mounted on the slider so as to be tiltable and axially movable. In a fine adjustment device for an optical instrument, the device is mounted so as to be rotatable around the circumference, the slider is slightly moved by tilting the operating lever, and the optical instrument main body can be slightly moved up and down by the rotating operation of the operating lever. , a through hole that is open at both ends is bored in the operating lever, a center shaft is inserted into the through hole so as to be relatively rotatable, and the center shaft is engaged with the slider so as to be unrotatable and tiltable about the axis. , the operating part of a switch mounted on the upper end of the center shaft is disposed at the upper end of the through hole, and a part of the wiring between the switch and the electronic circuit on the slider side is arranged within the center shaft for fine adjustment of an optical instrument. It is characterized in that it is a device.

The present invention will be explained below based on the drawings.

3- In FIGS. 1 and 2, 1 is a fundus camera as an optical instrument, and 2 is the eyeball of the subject.

The fundus camera 1 has a base 3, and two rails 4, 4 are fixed to the base 3'2 in parallel with an interval between them.

A plurality of conical projections 5 are provided on the rails 4, 4 at equal pitches in the longitudinal direction.

Further, a slider 6 is slidably mounted on the base 3''. A lateral guide shaft 7 passing through the front side of the slider 6 is rotatably held by the slider 6, and wheels 8.8 are fixed to both ends of the lateral guide shaft 7. The wheels 8, 8 are placed on a rail 4.degree. 4, and a plurality of engagement holes 9, 9 formed at the same pitch as the protrusions 5 are opened in the sides of the axles 8, 8. Note that the slider 6 is configured to be slidably displaced in the lateral direction with respect to the lateral guide shaft 7.

The inside of the slider 6 is hollow as shown in FIGS. 3 and 4. A guide hole 10 extending in the vertical direction and a holding cylinder 11 projecting into the slider 6 are formed in the front part of the upper portion 4f6a of the slider 6 (FIG. 3).

=4- A guide shaft 12 is fitted into the guide hole 10 so as to be vertically movable, and a female threaded cylinder 13 extending vertically is loosely inserted into the holding cylinder 11. An intermediate portion of the female threaded cylinder 13 is rotatably supported by the holding cylinder 11 by a radial ball bearing 14. Further, an outer flange 5 is protruded from the outer periphery of the upper end of the female threaded cylinder 13, and an inner flange 16 is protruded from the upper inner peripheral surface of the holding cylinder 11, and both flanges 15.
A thrust bearing 17 is interposed between the cylinders 6 and 6, and a gear 18 is integrally provided on the outer periphery of the upper end of the female threaded cylinder 13. A male screw 19 is screwed into the female screw cylinder 13,
An elevating table 20 is fixed to the two ends of the male screw 19 and the upper end of the guide shaft 12, and a support 21 is installed on the elevating table 20. A fundus camera body 25 serving as an optical instrument body is fixed to the upper end of the support column 21 . In the figure, 26 is a lens barrel of the fundus camera body 25, 27 is a cover that covers the elevator platform 20, and the cover 27 is fixed on the slider 6.

A lever insertion hole 28 is bored in the rear part of the upper wall 6a of the slider 6.
The upper end of 9 is rotatably held via a bearing 30. An inner flange 31 is integrally provided at the upper end of the wire receiving and holding cylinder 29, and a gear 32 is fixed to the lower end of the single wire receiving and holding cylinder 29 with screws 33. This gear 32 is meshed with the gear 18.

Further, a wire receiver 34 is disposed within the one wire receiver and holding cylinder 29. The wire receiver 34 includes a ring-shaped upper ball receiver member 35 with a tapered surface 35a that expands downward, and a ring-shaped lower wire receiver member 36 with a tapered surface 36a that expands upward. has been done. A spring 37 is interposed between a step 36b provided on the outer periphery of the lower wire receiving member 36 and a step 32a of the gear 32. As a result, the lower wire receiving member 36 and the upper ball receiving member 35 are brought into elastic contact with each other, and the two-part ball receiving member 3
5 is brought into elastic contact with the inner flange 31.

There is a pin insertion hole 38 between the wire receiving members 35 and 36 as shown in Fig. 4.
is formed, and the base of the rotation regulating pin 39 is fitted into the hole 29a of the wire receiver holding cylinder 29. A portion of the flange 39a provided at the intermediate portion of the rotation regulating pin 39 is disposed between the wire receiver holding cylinder 29 and the lower wire receiver member 36, and is prevented from coming off from the hole 29a. The tip of the rotation regulating pin 39 projects into the wire receiver 34 . 40 is a ring-shaped cover that covers the peripheral edge of the bearing 30 and the wire receiver holding cylinder 29, and 4 is a screw that fixes the cover 40 to the slider 6.

The operating lever 42 is inserted into the wire receiver 34 from the center of the cover 40, and the spherical portion 43 at the lower end of the operating lever 42 is inserted into the wire receiver 34.
It is rotatably held at 4. A rotation restriction groove 44 extending vertically is formed in this spherical portion 43, and the tip of the rotation restriction pin 39 is inserted into this rotation restriction groove 44.

The operating lever 42 has a through hole 4 opened at both ends.
5 is formed, and a center shaft 46 is inserted into this through hole 45. This center shaft 46 is rotatably held by the operating lever 42 via bearings 47 and 48.

A spherical portion 49 located within the recess 43a of the spherical portion 43 is formed near the lower end of the center shaft 46, and a spherical portion 50 is formed at the lower end of the center shaft 46. In addition, the spherical part 43°49
are centered.

Reference numeral 51 denotes a plate disposed within the slider 6, and the peripheral edge of the 7-plate 51 is fixed to the lower side wall of the slider 6. A cylindrical portion 50a extending into the recess 43a is integrally formed in the center of the plate 51, and a spherical portion 49 is inserted into the cylindrical portion 50a. Further, the rotation restriction pin 52 fixed to the cylindrical portion 50a is inserted into a rotation restriction 1f53 formed in the spherical portion 49 and extending in the vertical direction.

The peripheral edge of a molded plate 54 is fixed to the peripheral edge of the lower surface of the plate 51, and a temporary insertion space 55 is formed between the plates 51 and 54. A peripheral portion of a friction fixing plate 56 is loosely fed into this temporary insertion space 55.

A protrusion 57 is provided in the center of the friction fixing plate 56 to protrude downward, and a wire receiving hole 58 is bored therein. This protrusion 57 protrudes downward from the hole 54a of the molding plate 54 and comes into contact with the base 3. The spherical part 50 is inserted into the wire receiving hole 58, and the peripheral part of the friction fixing plate 56 and the plate 5
A bearing material 59 with low frictional resistance is interposed between the bearing member 1 and the bearing member 1 . Further, a rotation restriction groove 60 extending in the vertical direction opens in the wire receiving hole 58, and a rotation restriction pin 8-61 attached to the spherical portion 50 is inserted into the rotation restriction groove 60.

A cylindrical body 62 for holding a switch is disposed in the upper part of the operating lever 42 and is screwed onto the upper end of the center shaft 46 .

A push button switch 65 is housed in a space 63 within the cylindrical body 62.

Moreover, a hole 72 communicating with the space 63 is formed in the center shaft 46 . The lower end of this hole 72 opens laterally into the circumferential surface of the spherical portion at a position opposite to the rotation regulating groove 44 . Further, a notch 73 corresponding to the lower end opening of the hole 72 is formed in the upper part of the cylindrical portion 50a, and a flexible guide tube 74 is inserted into the lower end of the hole 72. The lower part of the guide tube 74 is disposed in the notch 73. A part of the cord 75 as a wiring whose one end is connected to the push button switch 65 is disposed within the hole 72 and the tube 74, and a portion of the cord 75 disposed outside from the center shaft 46 is disposed along the plate 51. It is arranged as follows. Furthermore, the other end of the cord 75 is connected to a shutter circuit (not shown) that controls the shutter of the fundus camera body 25. The shutter circuit, which is such an electronic circuit, can be placed inside the slider 6 or inside the fundus camera body 25 on the slider 6 side.

Next, the operation of an optical instrument equipped with a fine adjustment device having such a configuration will be explained.

The following procedure is used to align the optical axis ○ of the lens of the fundus camera 1 with the optical axis of the eyeball 2 of the subject. In other words, Masu,
The slider 6 is directly coarsely moved back and forth and left and right. Thereafter, when the operating lever 42 is tilted to the middle or right in FIG. 4, the operating lever 42 moves in the direction of the arrow R centering on the spherical portion 43 and tilts to the left or right as indicated by R. At this time, the spherical part 49 rotates within the cylindrical part 50a, and the rotation regulating pin 52.61 and the rotation regulating groove 53.6
0 is relatively displaced up and down. Moreover, the friction fixing plate 56
The protrusion 57 is frictionally fixed on the base 3 by the weight of the slider 3, and this frictional fixing plate 56 and the plate 5
Since a bearing material 59 is interposed between 1 and 1,
When the operating lever 42 is tilted to the left or right as described above,
The plate 51 and the friction fixing plate 56 are relatively displaced to the left or right, and the slider 6 moves slightly to the left or right.

On the other hand, when the operating lever 42 is rotated around the axis, this rotation is transmitted to the gear 18 via the rotation regulating pin 39, the wire holder holding cylinder 29, and the gear head, and the female screw cylinder 13 integrated with the gear 18 is rotated. As a result, the male screw 19 for lifting is moved up and down within the female screw cylinder 13, and the lifting platform 20 is moved up and down.
is raised and lowered, and the fundus camera body 25 attached to it via a support 21 is slightly moved downward. Moreover,
Since the center shaft 46 is prevented from rotating in the circumferential direction by the rotation restriction pin 52 and the rotation restriction groove 53, the operation lever 4
2 around the axis, the center shaft 46 does not rotate around the axis.

After the optical axis O of the fundus camera 1 is aligned with the optical axis of the eyeball 2 of the subject's eye through such coarse and fine movement operations, the push button switch 65 protruding from the upper part of the operating lever 42 is pressed.
When the button is pressed and turned on, the shutter of the fundus camera body 25 is operated, and the fundus of the eyeball 2 is photographed.

As described above, in this invention, a slider is slidably mounted on a base, an optical instrument body is mounted on the slider so as to be movable up and down, and an operating lever is mounted on the slider so as to be tiltable in left and right directions. and 11- An optical instrument mounted so as to be freely rotatable about an axis, and capable of slightly moving the slider by tilting the operating lever, and slightly moving the optical instrument body up and down by rotating the operating lever. In the fine adjustment device, the operation lever is provided with a through hole that is open at both ends, a center shaft is inserted into the through hole so as to be relatively rotatable, and the center shaft is fixedly moved around the axis so as to be non-rotatable but tiltable. The operating part of the switch attached to the upper end of the center shaft is disposed at the upper end of the through hole, and part of the wiring between the switch and the electronic circuit on the slider side is disposed within the center shaft. Since it is a fine adjustment device for instruments, even if the switch is connected to an electronic circuit such as an electronic shutter circuit using wiring such as a lead wire, the wiring will not be twisted and disconnected, and the connection can be made with high durability. Moreover, the fine movement of the optical instrument body can be performed in the same way as in the past. Furthermore, the switch can be operated immediately after operating the optical instrument body.

[Brief explanation of drawings]

FIG. 1 is a partial plan view of an eye 12-bottom camera equipped with a fine adjustment device according to the present invention, FIG. 2 is a side view of FIG. 1, and FIG.
The figure is a sectional view taken along line mm in FIG. 1, and FIG. 4 is a sectional view taken along line IV-IV in FIG. 1. ■... Fundus camera (optical instrument), 3... Base, 6... Slider, 25... Fundus camera body (optical instrument body), 42... Operation lever,
45...Through hole. 46...Center shaft, 65...Push button switch, 75...
Code (wiring).

Claims (1)

[Claims] A slider is slidably mounted on a base, an optical instrument body is mounted on the slider so as to be movable up and down, and an operating lever is mounted on the slider so as to be tiltable and rotational about an axis. In the fine adjustment device for an optical instrument, the slider can be moved slightly by tilting the operating lever, and the optical instrument main body can be slightly moved up and down by rotating the operating lever, when the operating lever is freely attached. A through hole that is open at both ends is bored in the through hole, a middle shaft is inserted into the through hole so as to be relatively rotatable, the middle shaft is engaged with the slider so as to be non-rotatable and tiltable about the axis, and the upper end of the middle shaft is An operating part of a switch mounted on the through hole is disposed at the upper end of the through hole. A fine adjustment device for an optical instrument, characterized in that a part of the wiring between the switch and the electronic circuit on the slider side is disposed within the center shaft.