JPH07171108A - Ophthalmic equipment - Google Patents

Abstract

(57) [Abstract] [Purpose] An ophthalmologic device that improves the workability of attachment to the camera mount by automatically fixing and releasing the fixation to the base according to the attachment and detachment of the movable body of the accessory. To provide. [Structure] A cradle restricting means 10 for fixing / unfixing the device body 9 to / from the base 1 is interposed between the cradle 5 of the device body 9 and the base 1, and a 35 mm camera 2 for the device body 9 is provided.
The 35 mm camera 2 is provided with the microswitches 30 and 34 detecting means for detecting the detached state of 1 and outputting a signal.
1 receives the signals from the microswitches 30 and 34 when it cannot detect 1 and controls the gantry limiting means 10 to fix the gantry 5 to the base 1, and the 35 mm camera 21.
An arithmetic and control circuit 37 is provided which receives the micro switches 30 and 34 when it detects that the pedestal limiting means 10 is operated and releases the fixing of the pedestal 5 to the base 1.

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 prevents movement of a movable body when an accessory is attached.

[0002]

2. Description of the Related Art Conventionally, in an ophthalmologic apparatus such as a fundus camera, an apparatus body having an optical system is mounted on a base so as to be movable back and forth and left and right, and the apparatus body is moved forward and backward.
By moving to the left and right, the optical system in the apparatus main body is aligned with the subject's eye. Moreover, in the fundus camera, a ring-shaped camera mount is provided at the rear part of the main body of the apparatus, and a photographing device (accessory) such as a 35 mm camera or a TV camera is detachably attached to the camera mount. .

Further, the 35 mm camera and the camera mount are respectively provided with a plurality of contacts for electrically connecting the control circuit in the 35 mm camera and the control circuit in the apparatus body to each other. When the 35 mm camera is mounted on the camera mount, the control circuit inside the 35 mm camera and the control circuit inside the apparatus body are electrically connected to each other,
The operation of the camera is controlled via a control circuit on the apparatus main body side.

When mounting such a 35 mm camera on the camera mount, a part of the camera mount is rotated in the circumferential direction while the mounted portion of the 35 mm camera is pressed against the camera mount.

Moreover, when the contacts provided on the 35 mm camera and the camera mount are brought into contact with each other, a pressing operation force of about 100 g is required for each contact to be brought into contact with each other. A pressing operation force of about 1 kg was required when mounting the camera on the camera mount.

[0006]

By the way, as described above, since the main body of the device is movable back and forth and left and right with respect to the base, when the 35 mm camera is mounted on the camera mount of the main body of the device, the main body of the device is 35 mm. It tries to move forward due to the pressing operation force of the camera.

Therefore, conventionally, before attaching the 35 mm camera to the camera mount of the apparatus main body, the tightening knob provided on the apparatus main body is rotated to fix the apparatus main body to the base, and the 35 mm camera is attached to the apparatus main body. When attaching to the camera mount of, while preventing the device body from moving forward due to the pressing operation force of the 35 mm camera, after the attachment, rotate the tension knob in the opposite direction to the above to move the device body to the base. I was trying to release the fixation.

However, before and after attaching the 35 mm camera to the camera mount of the main body of the apparatus as described above, there was a problem that the attaching operation was troublesome because it was necessary to manually rotate the tension knob.

Therefore, according to the present invention, the ophthalmologic apparatus is designed to improve the workability of attachment to the camera mount by automatically fixing and releasing the fixation to the base according to the attachment / detachment of the apparatus main body. It is intended to provide.

[0010]

In order to achieve this object, according to the present invention, a movable body incorporating an observation optical system is mounted on a base so as to be movable back and forth and left and right, and a part attached to the movable body. In an ophthalmic device that is detachably attached,
Detecting that a limiting means for fixing / releasing the movable body with respect to the base is interposed between the movable body and the base, and the attachment / detachment state of the accessory with respect to the movable body is detected to output a signal. Means is provided, and when the accessory cannot be detected, a signal from the detection means is received to control the operation of the limiting means to fix the movable body to the base, and detect the accessory. The ophthalmologic apparatus is provided with a control means that receives a signal from the detection means at this time and controls the operation of the limiting means to release the fixation of the movable body to the base.

[0011]

Embodiments of the present invention will be described below with reference to the drawings.

In FIGS. 1 and 2, 1 is a base of a fundus camera (ophthalmologic apparatus), 2 and 2 are columns attached to the left and right front end portions of the base 1, and 3 is a bridge between intermediate portions of the columns 2 and 2. The chin rest 4 is a forehead hung across the upper ends of the columns 2 and 2, and the pedestal 5 is mounted on the base 1 so as to be movable back and forth and left and right. In FIG. 1, S is a power switch (power switch).

The pedestal 5 is equipped with a control lever 6 for moving the pedestal 5 back and forth and to the left and right, and a device body 9 of the fundus camera via arms 7 and 8. Further, between the gantry 5 and the base 1, gantry limiting means 10 for fixing the apparatus main body 9 to the base and releasing the fixation is interposed as a locking means. An illumination optical system and an observation / photographing optical system are built in the apparatus main body 9, and a lens barrel 9a having an objective lens of the optical system protrudes from the front surface of the apparatus main body 9. The device body 9, the mount 5, the first and second arms 7, 8 and the like are movable bodies S.
Make up D.

As shown in FIG. 3A, the gantry limiting means 10 includes a rotary solenoid 11 fixed to the bottom wall portion 5a of the gantry 5, and a rotary shaft 11a of the rotary solenoid 11.
And a spring 13 (solenoid return spring) interposed between the rotary solenoid 11 and the rotary shaft 11a to bias the rotary shaft 11a in one direction. .

Further, the gantry limiting means 10 includes a screw shaft 14 which is screwed to the bottom wall portion 5a of the gantry 5 so as to be vertically movable.
Friction fixing rubber 15 fixed to the lower end of the screw shaft 14.
And a screw 16a in the middle of the screw shaft 14 (see FIG. 4 (b))
The second arm 16 fixed by, and the first and second arms 1
A connecting rod 1 in which both ends are rotatably attached to 2, 16
Have 7. The crank-shaped bent portions 17a and 17b at both ends of the connecting rod 17 are the first and second bent portions as shown in FIG. 3 (a).
The first and second arms 1 are penetrated through the arms 12 and 16.
It is rotatably held by 2 and 16.

When the rotary solenoid 11 is not energized, the first and second arms 12 and 16 are moved to the positions indicated by the solid line in FIG. 15 is pressed against the base 1 as shown in FIG. 3 (a), and the pedestal 5 is frictionally fixed to the base 1. Also, when the rotary solenoid 11 is energized, the first arm 12 is rotated from the position indicated by the solid line in FIG.
Is rotatively moved upward by a screw action, the friction fixing rubber 15 is separated from the base 1 as shown in FIG. 3 (b),
The gantry 5 is set so as to be movable back and forth and left and right with respect to the base 1.

The camera mounting means 2 is provided at the rear of the apparatus body 9.
The 35 mm camera 21 is detachably attached through the 0.

The camera mounting means 20 has a camera mount 22 mounted on the rear wall 9a of the apparatus body 9 as shown in FIG. 5 (a), and the camera mount 22 is fixed to the rear wall 9a with screws. It has a ring-shaped mount body 23. The mount body 23 has a large diameter portion 23a and a small diameter portion 23b. Moreover, the camera mount 23 has a fixing ring 24 screwed on the outer periphery of the large diameter portion 23a so as to be able to move back and forth.

An inner flange 25 is provided on one side of the fixing ring 24, and the inner flange 25 is shown in FIG.
As shown in FIG. 3, three notches 25a, 25b, 25c are formed. Moreover, the camera mounting means 20 is shown in FIG.
As shown in FIG. 7, a cylindrical mount 21a, which is the mounted portion of the 35 mm camera 21, and a projection provided at the tip of the mount 21a corresponding to the cutouts 25a, 25b, 25c as shown in FIGS. Three locking pieces 21b, 21c, 21d
And a positioning groove 21e formed between the locking pieces 21b and 21c.

A ring rotating lever 26 is fixed to the inner flange 25, as shown in FIG. Moreover, as shown in FIG.
As shown in FIG. 6, an arc-shaped slit 27 extending in the circumferential direction is formed along the ring-shaped camera mount 22,
An engaging pin 28 having one end fixed to the lever 26 is inserted through the slit 27.

A micro switch 30 fixed to the inner surface of the rear wall 9a by a screw 29 is provided in the main body 9 of the apparatus as a detecting means for detecting the attachment / detachment state of the accessory. The actuator lever 30a of the micro switch 30 extends across the slit 27, and when pressed by the engagement pin 28 associated with the turning operation of the fixing ring 24, the micro switch 30 is turned on. . At this ON position, the fixing ring 24 is set to be in a state in which the fixing ring 24 has been completely tightened and fixed and the fixing ring 24 has been rotated to the lock position.

Further, the large diameter portion 23a of the mount body 23 and the rear wall 9a are provided with a pin insertion hole 31 formed at the center of the upper portion, and the pin insertion hole 31 is formed on the inner surface of the rear wall 9a.
The bracket 32 is fixed to the upper part of the bracket with screws 33.

The bracket 32 has a support portion 32a perpendicular to the rear wall 9a and a support portion 32b provided integrally with the support portion 32a and parallel to the rear wall 9a.

A micro switch 34 is fixed to the supporting portion 32a as a detecting means for detecting the attachment / detachment state of the accessory, and a pressing pin 35 is slidable in the pin inserting hole 32c and the pin inserting hole 31 of the supporting portion 32b. Inserted and held. The push pin 35 has a micro switch 34 at one end.
Of the camera mount 2 while the micro switch 34 is in the OFF state when the other end is brought into contact with the actuator rod 34a of
2 is projected from the end face.

Further, as shown in FIG. 5 (b), a pin mounting hole 23c is formed in the large diameter portion 23a of the mount body 23 so as to be positioned at the center of the lower portion, and a positioning pin 23d is formed in this pin mounting hole 23c. Is fitted.

The signals from the microswitches 30 and 34 described above are input to the accessory detection circuit 36 shown in FIG.
The accessory detection signal from the accessory detection circuit 36 is the device body 9
It is input to the arithmetic and control circuit 37 which controls each of the drive units and the 35 mm camera 21. This micro switch 30,3
4 and the accessory detection circuit 36 constitute accessory detection means AS.

The accessory detection circuit 36 inputs an accessory detection signal notifying that the accessory is mounted to the arithmetic control circuit 37 only when the ON signals are input from both the microswitches 30 and 34. It is supposed to do.
The arithmetic control circuit 37 is connected to the rotary solenoid 11 of the gantry limiting means 10 via the gantry limiting circuit 38.

The arithmetic and control circuit 37 receives a signal from the accessory detection circuit 36 when the accessory cannot be detected, and stops the energization of the rotary solenoid 11 of the pedestal restricting means 10 to remove the friction fixing rubber 15. Press it against the base 1,
The device body 9 is set to be fixed to the base 1.

Further, the arithmetic control circuit 37 receives a signal from the accessory detection circuit 36 when the accessory is detected,
The rotary solenoid 11 of the gantry limiting means 10 is energized via the gantry limiting circuit 38 to separate the friction fixing rubber 15 from the base 1 and release the fixing of the apparatus main body 9 to the base 1. 5 and 6, reference numeral 40 is a through hole for forming an optical path in the mount body 23.

Next, the control operation of the arithmetic control circuit 37 will be described with reference to FIG.

Step S1 When the power switch S is turned on to activate the arithmetic control circuit 37, the arithmetic control circuit 37 activates the accessory detection circuit 36 and the pedestal limit circuit 38 in step S1, and then the step S1.
Move to 2.

Step S2 In step S2, it is judged whether or not the accessory 35 mm camera 21 is attached to the camera mount 22 of the apparatus main body 9, that is, an accessory detection signal is input from the accessory detection circuit 36. It is determined whether or not it is present, and if YES, the process proceeds to step S3, and if NO, the process proceeds to step S5.

Step S3 In step S3, the rotary solenoid 11 of the gantry limiting means 10 is energized via the gantry limiting circuit 38 to separate the friction fixing rubber 15 from the base 1 to release the fixing of the apparatus body 9 to the base 1. Then, the process proceeds to step S4.

Step S4 In step S4, a state in which the eye to be inspected can be observed and photographed through the apparatus body 9 and the 35 mm camera 21 is returned to step S2, and the process loops.

Step S5 In step S2, the camera mount 22 of the apparatus main body 9 is mounted with
When it is determined that the 5 mm camera 21 is not attached, when the process proceeds to step S5, in step S5, energization of the rotary solenoid 11 of the gantry limiting means 10 by the gantry limiting circuit 38 is stopped, and the friction fixing rubber 15 Is pressed against the base 1, the apparatus main body 9 is fixed to the base 1, and the process proceeds to step S2 to loop.

(1) Attachment of accessory parts In this state of step 5, as shown in FIG. 6 (a), the lever 26 is positioned upward and the fixing ring 24 is loosened. , 21c, 21d
By aligning the cylindrical mount 21a of the 35 mm camera 21 with the outer circumference of the small diameter portion 23b of the mount main body 23 by aligning the notches 25a, 25b, 25c of FIG. Three locking pieces 21b, 21 of the camera 21
c and 21d are brought into contact with the large diameter portion 23a of the mount body 23 through the notches 25a, 25b and 25c provided in the inner flange 25 of the fixing ring 24.

At this time, the end of the pressing pin 35 is pressed by the tip of the cylindrical mount 21a of the 35 mm camera 21, and the pressing pin 35 is displaced to the micro switch 34 side. As a result, the actuator rod 34a of the micro switch 34 is pushed by the push pin 35 and turned on,
The signal from the micro switch 34 is input to the accessory detection circuit 36. Meanwhile, at the same time, the positioning pin 2
The positioning groove 21e is aligned with 3d, and the cylindrical mount 23a and the locking piece 21d are pressed.

In this state, the 35 mm camera 21 is shown in FIG.
Rotate 180 ° or more in the counterclockwise direction to the position shown in FIG. 6 (b). As a result, the positioning groove 2 of the 35 mm camera 21
When 1e faces the positioning pin 23d, the positioning pin 23d is engaged with the positioning groove 21e by the spring force of the spring 23e, and a click feeling at the time of this engaging position determination is obtained.

At this time, the mount 21 of the 35 mm camera 21
A plurality of contacts (not shown) provided on a simultaneously press-contact with a plurality of contacts provided on the mount body 23 of the apparatus body 9,
Even if the rotational pressing force at this time is transmitted to the apparatus main body 9 side, since the pedestal 5 of the apparatus main body 9 is frictionally fixed to the base 1 by the friction fixing rubber 15 of the pedestal limiting means 10, the apparatus main body 9 moves. Without doing so, the 35 mm camera 21 can be easily attached to the apparatus main body 9.

At this position, the lever 26 is rotated counterclockwise from the position shown in FIG. 6A to the position shown in FIG. 6B, whereby the inner flange 25 of the fixing ring 24 and the camera mount. 35 mm camera 21 between the large diameter portion 23a of 23
The locking pieces 21b, 21c, and 21d are clamped and fixed.

At this time, the engaging pin 2 fixed to the lever 26
8 is an actuator lever 30 of the micro switch 30
The inside of the slit 27 is moved to the side a, and the actuator lever 30a is pressed at the position shown in FIG. 6 (b). As a result, the micro switch 30 is turned on, and this ON signal is input to the accessory detection circuit 36.

Then, in this way, the microswitch 3
When the signals from 0 and 34 are input to the accessory detection circuit 36 at the same time, the accessory detection signal is input from the accessory detection circuit 36 to the arithmetic control circuit 37, and the accessory detection circuit 36 detects the accessory in step S2. It is determined whether or not the detection signal is input, and if YES, it is determined in step S
Move to 3. Then, in step S3, the arithmetic control circuit 37 energizes the rotary solenoid 11 of the gantry limiting means 10 via the gantry limiting circuit 38.

As a result, the rotary shaft 11a of the rotary solenoid 11 is rotated against the spring force of the spring 13, and the first arm 12 is rotated counterclockwise in FIG. 4 (a). . And this rotation is the connecting rod 1
7, the screw shaft 14 is transmitted via the second arm 16, the screw shaft 14 is rotated around the axis line, and the screw shaft 14 is moved in the direction away from the base 1, and the friction fixing rubber 15 is shown. As shown in FIG. 4 (b), it is separated from the base 1 and the fixing of the pedestal 5 to the base 1 is released.

(2) Replacement of accessories When removing the 35 mm camera 21 as an accessory from the camera mount 22 in order to replace it with another camera,
Contrary to the above, the lever 26 is rotated clockwise in FIG. 6 so that the inner flange 25 of the fixing ring 24 and the mount body 23 engage the locking pieces 21b, 2 of the 35 mm camera 21.
The clamping of 1c and 21d is released.

As a result, the microswitch 30
Since the ON signal will not be input to the accessory detection circuit 36,
The accessory detection signal is not input from the accessory detection circuit 36 to the arithmetic control circuit 37. Thereby, step S2
If the accessory detection signal is not input from the accessory detection circuit 36 to the arithmetic control circuit 37, it is determined as NO.
Then, the process proceeds to step S5.

As a result, the arithmetic and control circuit 37 stops energizing the rotary solenoid 11 of the gantry limiting means 10 via the gantry limiting circuit 38.

As a result, the rotary shaft 11a of the rotary solenoid 11 is rotated in the opposite direction by the spring force of the spring 13, and the first arm 12 is rotated clockwise in FIG. 4 (a). To be made. Then, this rotation is transmitted to the screw shaft 14 via the connecting rod 17 and the second arm 16, the screw shaft 14 is rotated around the axis, and the screw shaft 14 is moved toward the base 1 side. The friction fixing rubber 15 is brought into pressure contact with the base 1 as shown in FIG.

In this state, even when the 35 mm camera 21 is rotated in the opposite direction to the mounting direction, a plurality of unillustrated contacts provided on the mount 21a of the 35 mm camera 21 are provided on the mount body 23 of the apparatus body 9. Simultaneous pressing contact with multiple contacts. However, even if the rotational pressing force at this time is transmitted to the apparatus main body 9 side, since the pedestal 5 of the apparatus main body 9 is frictionally fixed to the base 1 by the friction fixing rubber 15 of the pedestal limiting means 10, the apparatus main body 9 The 35 mm camera 21 can be easily removed from the apparatus body 9 without moving.

[0049]

As described above, according to the present invention, the fixing / releasing to the base is automatically performed according to the attachment / detachment of the movable body of the accessory. There is no need to fix or release the fixing to the base, and the workability of attaching the accessory movable body to the camera mount is improved.

[Brief description of drawings]

FIG. 1 is a side view of a fundus camera as an ophthalmologic apparatus showing an embodiment of the present invention.

2A is a perspective view of the fundus camera shown in FIG. 1, and FIG.
It is a principal part perspective view which looked at the camera attachment part of (a) from the opposite side to (a).

FIG. 3 (a) is a cross-sectional view of the gantry restricting means shown in FIG. 1, (b).
FIG. 7 is an explanatory view of a main part showing another state of the friction fixing rubber shown in (a).

FIG. 4A is a plan view for schematically explaining the relationship between the rotary solenoid and the connecting rod of FIG. 3A, and FIG. 4B is a view of A of FIG.
It is sectional drawing which follows the -A line.

5A is a cross-sectional view of the 35 mm camera and its mounting portion shown in FIGS. 1 and 2, FIG. 5B is a partially enlarged view of FIG. 5A, and FIG. 5C is a microswitch mounting portion of FIG. Explanatory drawing seen from the direction of arrow B, (d) is
It is explanatory drawing which looked at the micro switch attachment part of (a) from the arrow C direction.

6A is a front view of a camera mount of the apparatus main body, FIG.
FIG. 6 is an explanatory diagram showing another state of FIG.

7A is a front view of a mount tip portion of the 35 mm camera of FIG. 5A, FIG. 7B is a sectional view taken along the line D-D of FIG. 5A, and FIG.
[Fig. 3] is a plan view of (a).

8A and 8B are explanatory views for mounting a 35 mm camera.

9 is a control circuit diagram showing the relationship between the arithmetic control circuit shown in FIG. 1 and switches.

10 is a flowchart of the control circuit shown in FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Base 5 ... Stand 9 ... Device body 10 ... Stand limiting means 21 ... 35mm camera (accessory) 22 ... Camera mount 30, 34 ... Micro switch (detection means) 36 ... Accessory detection circuit 37 ... Arithmetic control circuit (control) Means) AS ... accessory detection means

Claims (1)

[Claims] 1. An ophthalmologic apparatus in which a movable body having a built-in observation optical system is mounted on a base so as to be movable back and forth and left and right, and an accessory is detachably mounted on the movable body. The limiting means for fixing and releasing the fixing is interposed between the movable body and the base, and a detecting means for detecting a detached state of the accessory with respect to the movable body and outputting a signal is provided, and When the accessory is not detected, a signal from the detector is received to control the operation of the limiter to fix the movable body to the base, and the detector when the accessory is detected. An ophthalmologic apparatus comprising: a control unit that receives a signal from the control unit and controls the operation of the limiting unit to release the fixation of the movable body to the base.