JPH08106B2 - Optical instrument - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical instrument in which a main body of the optical instrument is finely moved back and forth and left and right by tilting an operating lever.

[0002]

2. Description of the Related Art An optical instrument of this type is, for example, 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 eye to be inspected. It is mounted on the base (table) so that it can be moved and adjusted. Moreover, this movement adjustment is performed by roughly moving the camera body and then finely moving it.

Further, as such a fine movement device for moving the camera body forward, backward, leftward, rightward and downward, that is, a fine adjustment device, a slider is slidably mounted on a base and the camera body can be moved up and down on the slider. The slider is mounted on the slider so that the operation lever can be tilted in any direction and can be rotated about the axis, and the tilt of the operation lever moves the slider slightly back and forth and left and right to move around the axis of the operation lever. It is conceivable that the camera body can be finely moved up and down by the rotating operation of.

On the other hand, in the fundus camera, the fundus is photographed after the movement adjustment of the camera body as described above.
It is desirable that this shooting can be done quickly.

However, since the photographing switch is conventionally provided in the camera body, after the fine movement operation of the camera body is performed by the operation lever, the location of the photographing switch of the camera body is confirmed and the photographing switch is operated. Since it was necessary, the shooting operation could not always be performed quickly.

In order to solve this problem, it is considered to attach a photographing switch to the upper end of the operation lever.

[0007]

However, in this ophthalmic optical machine, a commercially available switch is directly attached to the switch, so that the appearance is not good, and the operability of the commercially available switch is relatively small. It was a thing.

[0008] Therefore, an object of the present invention is to provide an optical instrument capable of improving the operability of an electronic circuit provided for controlling the ophthalmologic instrument body.

[0009]

In order to achieve this object, according to the present invention, a slider on which an optical instrument body is supported is slidably mounted on a base, and the optical instrument body can be moved up and down on the slider. Mounted on the slider so that the operation lever can be tilted and rotated about the axis,
The slider is provided so as to be capable of finely moving left and right and back and forth by tilting the operation lever, and the optical instrument body is provided so as to be finely moved up and down by a plurality of rotational operations around the axis of the operation lever, and the optical instrument body is controlled. In an optical instrument provided with an electronic circuit for use in the operation lever, a through hole that extends vertically and is opened at the upper end is formed in the operation lever, and a pressing operation member is provided in the upper end portion of the through hole, and the upper end portion is the upper end of the through hole. pressurized et al.
Together is held so as to leave collision, the switch to drive the electronic circuit in response to the pressing operation of the pressing pressure operation member is an optical instrument about the axis held on the slider side to be unrotatable of the operating lever It is characterized by

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the drawings.

In FIGS. 1 and 2, 1 is a fundus camera as an optical instrument, and 2 is an eyeball of an examinee.

The fundus camera 1 has a base 3 and the base 3
Two rails 4 and 4 are fixed in parallel on the upper side with a space therebetween. A plurality of conical projections 5 are provided on the rails 4 and 4 at equal pitches in the longitudinal direction. Also, base 3
A slider 6 is slidably mounted on the top. The lateral guide shaft 7 penetrating 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 and 8 are placed on the rails 4 and 4, and a plurality of engaging holes 9 and 9 formed at the same pitch as the protrusions 5 are formed on the circumferential surface of the wheels 8 and 8. The slider 6 is slidably displaced laterally 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 portion of the upper wall 6a of the slider 6 (FIG. 3). Guide hole 10
A guide shaft 12 is vertically movably fitted therein, and a female screw cylinder 13 extending in the vertical direction is loosely inserted in the holding cylinder 11. An intermediate portion of the female screw cylinder 13 is rotatably supported on the holding cylinder 11 by a radial ball bearing 14. Further, an outer flange 15 is provided on the outer periphery of the upper end of the female screw cylinder 13, and an inner flange 16 is provided on the upper inner peripheral surface of the holding cylinder 11, and a thrust is provided between the two flanges 15. A bearing 17 is interposed, and a gear 18 is integrally provided on the outer periphery of the lower end portion of the female screw cylinder 13. A male screw 19 is screwed into the female screw cylinder 13, and an elevating table is mounted on the upper end of the male screw 19 and the upper end of the guide shaft 12.
20 is fixed, and columns 21 are planted on the lift 20. A fundus camera body 25 as an ophthalmologic instrument body, that is, an optical instrument body is fixed to the upper end of the column 21. In the figure, 26 is a lens tube of the fundus camera body 25, 27 is a cover for covering the lifting table 20, and the cover 27 is fixed on the slider 6.

A lever insertion hole 28 is formed in the rear portion of the upper wall 6a of the slider 6, and the upper end of a ball receiving and holding tube 29 is rotatably held in the lever insertion hole 28 via a bearing 30. ing. An inner flange 31 is integrally provided at the upper end of the ball receiving and holding cylinder 29, and a gear is provided at the lower end of the ball receiving and holding cylinder 29.
32 is fixed with screws 33. The gear 32 is meshed with the gear 18.

A ball receiver 34 is arranged in the ball receiver holding cylinder 29. The ball receiver 34 is composed of a ring-shaped upper ball receiving member 35 having a tapered surface 35a that expands downward and a ring-shaped lower ball receiving member 36 having a taper surface 36a that expands upward. Has been done. And this lower ball receiving member
A spring 37 is interposed between a step 36 b provided on the outer circumference of the step 36 and the step 32 a of the gear 32. As a result, the lower ball receiving member 36 and the upper ball receiving member 35 are in elastic contact with each other, and the upper ball receiving member 35 is in elastic contact with the inner flange 31.

A pin insertion hole 38 is formed between the ball receiving members 35 and 36 as shown in FIG. 4, and a base portion of a rotation restricting pin 39 is fitted in a hole 29a of the ball receiving and holding cylinder 29. The flange 39a provided in the middle of the rotation restricting pin 39 is a ball receiving and holding cylinder.
29 is partially provided between the lower ball receiving member 36 and the hole 29a.
It is prevented from coming off, and the tip of the rotation restricting pin 39 receives the ball.
It projects into 34. 40 is a bearing 30 and a ball receiving and holding cylinder
A ring-shaped cover that covers the peripheral edge of 29, and 41 are screws that fix the cover 40 to the slider 6.

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

A through hole 45 opening at both ends is formed in such an operating lever 42, and a center shaft 46 is inserted into this through hole 45. The center shaft 46 is rotatably held by the operating lever 42 via bearings 47 and 48. A spherical portion 49 located in the recess 43a of the spherical portion 43 is formed near the lower end portion of the center shaft 46, and a spherical portion 50 is formed at the lower end portion of the center shaft 46. The centers of the spherical portions 43 and 49 coincide with each other.

Reference numeral 51 denotes a plate (actuating means) arranged in the slider 6, and the peripheral portion of the plate 51 is fixed to the lower portion of the side wall of the slider 6. A recess 43 in the center of the plate 51
A tubular portion 50a extending to the inside of a is integrally formed, and a spherical portion 49 is inserted into the tubular portion 50a. Further, the rotation restricting pin 52 fixed to the cylindrical portion 50a is inserted into a rotation restricting groove 53 formed in the spherical portion 49 and extending in the vertical direction.

A molding plate is provided around the lower surface of the plate 51.
The peripheral portion of 54 is fixed, and a plate insertion space 55 is formed between the plates 51 and 54. In the plate insertion space 55, the peripheral edge of the friction fixing plate 56 (actuating means) is loosely fed.
At the center of the friction fixing plate 56, a protrusion 57 is provided so as to protrude downward and a ball receiving hole 58 is provided. This protrusion
57 projects downward from the hole 54a of the molding plate 54 and is in contact with the base 3. The spherical portion 50 is inserted into the ball receiving hole 58,
A bearing member 59 having a low friction resistance is interposed between the plate 51 and the peripheral edge of the friction fixing plate 56. Also, the ball receiving hole 58
A rotation restricting groove 60 extending in the up-down direction is opened in the inside, and a rotation restricting pin 61 mounted on the spherical portion 50 is inserted into the rotation restricting groove 60.

A bulging grip portion 42 at the upper end of the operating lever 42
A switch-holding tubular body 62 screwed onto the upper end of the center shaft 46 is disposed in a, and a push button switch 65 is housed and held in a space 63 in the tubular body 62. As a result, the push operation member 65a of the push button switch 65 also moves to the center shaft 46.
It is held indirectly on the upper end of the. Moreover, pressing member 65a, along with being brought out top or et collision apparent as the operation lever 42 from the FIG., And is able to rotate relative to the operating lever 42.

A hole 72 communicating with the space 63 is formed in the center shaft 46. The lower end of this hole 72 is opened laterally on the peripheral surface of the spherical portion at a position opposite to the rotation restricting groove 44. A notch 73 corresponding to the lower end opening of the hole 72 is formed in the upper part of the tubular portion 50a, and a flexible guide tube 74 is inserted in the lower end of the hole 72. The lower portion of the guide tube 74 is arranged in the cutout 73.

A part of the cord 75, which has one end connected to the push button switch 65 and serves as wiring, has a hole 72 and a tube 74.
A portion of the cord 75, which is disposed inside and is disposed outside the center shaft 46 of the cord 75, is disposed along the plate 51. Further, 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 arranged in the slider 6 or in the fundus camera body 25 on the slider 6 side.

Next, the operation of the optical instrument provided with the fine adjustment device having such a configuration will be described.

To align the optical axis O of the lens of the fundus camera 1 with the optical axis of the eyeball 2 of the subject, the following procedure is performed. That is, first, the slider 6 is directly moved roughly back and forth and left and right.
Thereafter, when the operating lever 42 is tilted leftward or rightward in FIG. 4, the operating lever 42 tilts leftward or rightward around the spherical portion 43 as indicated by arrows L and R. At this time, the spherical portion 49 rotates within the tubular portion 50a, and the rotation restricting pins 52 and 61 and the rotation restricting grooves 53 and 60 are relatively displaced vertically.

Moreover, the protrusion of the friction fixing plate 56 (actuating means)
57 is frictionally fixed to the base 3 by the weight of the slider 3 side, and a bearing material 59 is interposed between the friction fixing plate 56 and the plate 51. Therefore, as described above, the operation lever 42 is left. Alternatively, when it is tilted to the right, the center shaft 46 is also tilted by the operating lever 42, the plate 51 and the friction fixing plate 56 that engage with the lower end of the center shaft 46 are relatively displaced to the left or right, and the slider 6 moves. Make a slight movement to the left or right.

On the other hand, when the operation lever 42 is rotated around the axis, this rotation is transmitted to the gear 18 via the rotation restricting pin 39, the ball receiving and holding cylinder 29, and the gear 32, and the female member integrated with the gear 18 is transmitted. The screw cylinder 13 is rotated. This makes it possible to raise and lower the male screw.
19 is moved up and down in the female screw cylinder 13 to move up and down the elevating table 20, and the fundus camera main body 25 attached to this via the support column 21 is finely moved up and down. Moreover, since the rotation of the center shaft 46 in the circumferential direction is prevented by the rotation restricting pin 52 and the rotation restricting groove 53, even if the operation lever 42 is rotated about the axis, the center shaft 46 rotates about the axis. Do not turn to.

By such coarse and fine movement operations, the optical axis O of the fundus camera 1 is made to coincide with the optical axis of the eyeball 2 of the examinee's eye, and then the pressing operation member 65a projecting above the operation lever 42. When is pressed to turn on the push button switch 65, the shutter of the fundus camera body 25 is operated, and the fundus of the eyeball 2 is photographed.

Since the present invention is constructed as described above, "(i) That is, since the pressing operation member for operating the electronic circuit is not located on the side portion of the operation lever or the like, it is pressed when the operation lever is operated. is not such that an erroneous operation of the electronic circuit by operating the operating member inadvertently. (ii) since the upper end portion or et collision issued allowed configuration of the operating lever pressing member for electronic circuit operation, the operating lever By tilting the operating lever while grasping the upper end of the operation lever, it is only necessary to move the thumb of the operator's hand to the center side along the upper surface of the operating lever without moving it significantly upward from the upper surface of the operating lever. The operator's thumb etc. can be quickly and easily moved onto the operation member, and the pressing operation of the pressing operation member becomes very easy. (Iii) Further, the pressing operation member for operating the electronic circuit is operated. From the top of the lever Since it does not protrude, it is possible to prevent the pressing operation member from impairing the appearance of the operation lever, whereby the present invention can improve the operability of the electronic circuit provided for controlling the optical instrument body. (iv) Since the switch for driving the electronic circuit according to the pressing operation of the pressure operation member is held on the slider side so as not to rotate about the axis of the operation lever, the operation lever is rotated about the axis. Even if the optical device body is finely moved up and down by rotating, the cord from the switch will not be twisted by the rotating operation around the axis of the operating lever. "

[Brief description of drawings]

FIG. 1 is a partial plan view of a fundus camera including a fine adjustment device according to the present invention.

FIG. 2 is a side view of FIG.

3 is a sectional view taken along the line III-III in FIG.

FIG. 4 is a sectional view taken along the line IV-IV in FIG. 1;

[Explanation of symbols]

 1 ... fundus camera (optical instrument) 3 ... base 6 ... slider 25 ... fundus camera body (ophthalmologic instrument body) 42 ... operation lever 65 ... push button switch 65a ... push operation member

Claims (1)

[Claims] 1. A slider on which an optical instrument main body is supported is slidably mounted on a base, the optical instrument main body is mounted on the slider so as to be vertically movable, and an operating lever can be tilted and an axis line is attached to the slider. The slider is mounted so that it can be rotated around, and the slider can be finely moved to the left and right and back and forth by tilting the operation lever, and the optical instrument body can be finely moved up and down by multiple rotations around the axis of the operation lever. And an electronic circuit for controlling the main body of the optical instrument, the operating lever is provided with a through hole that extends vertically and opens at an upper end, and a pressing operation is performed in an upper end portion of the through hole. with the upper end portion of the member is held so as to leave top or et collision of the through hole, the switch axis round of the operation lever to drive the electronic circuit in response to the pressing operation of the pressing pressure operation member The optical instrument is characterized in that it is non-rotatably held on the slider side.