JPH0522901Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an eyepiece device for an endoscope whose eyepiece portion can be adjusted.

[Conventional technology]

Generally, an endoscope includes an insertion section and an operating section, and the operating section is provided with an eyepiece.
This eyepiece device holds the other end of an image guide with one end facing an observation window provided at the distal end of the insertion section, and an eyepiece that can be focused by facing the other end of the image guide. The lens will be retained. Therefore, by looking through this eyepiece and adjusting the focus, it is possible to observe the image formed by the eyepiece from the observation window through the image guide, that is, the end face image of the image guide. .

By the way, the end of the image guide guided and held by the eyepiece is determined by the degree of concentricity with respect to the axis of the eyepiece, the position of the output end face with respect to the axis of the eyepiece, and the rotational direction of the image of the output end face with respect to the image of the input end face. Unless it is possible to adjust the deviation and the inclination of the exit end face, it is not possible to observe a good image through the eyepiece.

[Problem that the invention attempts to solve]

However, when adjusting the mounting frame that holds the end of the image guide, it is necessary to prevent the mounting frame from interfering with the member that supports it.

Furthermore, when adjusting the inclination of the mounting frame that holds the end of the image guide using an adjustment screw, alignment in the optical axis direction must also be performed at the same time. For this reason, even if one was set, the other would go out of order again, and adjustment could not be done easily.

The present invention was developed in view of the above-mentioned problems, and its purpose is to provide an eyepiece device for an endoscope that can easily and reliably adjust the end of an image guide, especially the tilt adjustment. There is a particular thing.

[Means and effects for solving the problem] In order to solve the above problem, the present invention supports the mounting frame for attaching the end of the image guide to the support frame via a support screw, and also supports the mounting frame to which the end of the image guide is attached. and the support frame are arranged apart from each other without being in direct contact with each other. Therefore, the mounting frame does not interfere with the support frame, and adjustment can be easily and accurately performed.

〔Example〕

An embodiment of the present invention will be described below with reference to the drawings. In FIG. 1, reference numeral 1 denotes an endoscope, and this endoscope 1 consists of an insertion section 2 and an operation section 3. The insertion section 2 has a distal end component 6 provided at the distal end of a flexible tube section 4 via a curved tube section 5, and an observation window 7 and an illumination window 8 are provided on the distal end surface of the distal end component 6. The forceps channel 9 is opened at the same time. The operation section 3 includes an operation knob 10 for bending the bending tube section 5, an air/water supply switching valve 11, a suction operation valve 12, a forceps insertion port body 13 communicating with the forceps channel 9, and the observation window 7, which will be described later. A universal cord 15 is provided, through which a light guide (not shown) is inserted, which is connected to an eyepiece device 14 and a light source device (not shown), which are optically connected to each other. It is being

The eyepiece device 14 is constructed as shown in FIG. That is, a mounting hole 17 is provided in the main body 16 of the operating section 3, and a recess 18 formed around the mounting hole 17 has a flange 19 at the lower end, through which the main body 16 is screwed. A holding cylinder 21 fixed at 20 is provided. In addition, screw 2
0 is fixed to the main body 16 with a nut 23 via a ceramic insulating member 22 that allows the eyepiece 14 to float electrically. An adjustment cylinder 24 is inserted into the holding cylinder 21 so as to be displaceable in the axial direction. A first engagement groove 25 having a V-shaped cross section is formed on the outer circumferential surface of the adjustment cylinder 24, and a plurality of grooves screwed into the peripheral wall of the holding cylinder 21 are formed in the first engagement groove 25. The conical tip of the first adjustment screw 26 is engaged. Therefore, by screwing in the first adjusting screw 26, the adjusting tube 24 can be displaced.

Inside the adjustment cylinder 24, there is a first cylinder part 27a and a second cylinder part 27a.
A support frame 27 connected to the cylindrical portion 27b is inserted. The first cylindrical portion 27 of this support frame 27
A collar 28 is provided on the outer peripheral surface of the second cylinder part 2.
A step portion 29 and a second engagement groove 30 are formed in the outer circumferential surface of 7b and are continuous with the step portion 29. A spring 31 for biasing the support frame 27 in the upward direction is interposed between the collar 28 and the upper end surface of the holding cylinder 21, and the stepped portion 29 is provided to protrude from the inner circumferential surface of the adjusting cylinder 24. The support frame 27 engages with the projection 32 and the spring 3
A plurality of second adjustment screws 33 are screwed into the second engagement groove 30 into the peripheral wall of the adjustment cylinder 24 (only one is shown). is engaged. Therefore, the support frame 27 can be displaced in the vertical direction (axial direction) together with the adjustment tube 24 by adjusting the first adjustment screws 26, and can be displaced in the vertical direction (axial direction) by adjusting the second adjustment screws 33. It is designed to be displaced in the radial direction.
Note that an adjustment cylinder 24 is provided on the peripheral wall of the holding cylinder 21.
Once the axial position has been determined, a fixing screw 34 is screwed in to fix this to the holding cylinder 21.

A mounting frame 35 is inserted into the support frame 27. The mounting frame 35 is made up of a protective cylinder part 35a and a grip cylinder part 36 formed at the upper end and which has a larger diameter than the protection cylinder part 35a.
A plurality of, for example, three
It is swingably supported by book support screws 37. This mounting frame 35 is attached to the support frame 2.
The inclination is forcibly adjusted using the support screw 37 as a fulcrum by a plurality of third adjustment screws 38 (only one is shown) screwed into the outer peripheral wall of the second cylindrical portion 27b of No. 7. It is becoming possible to do this. Further, the end of the image guide 39 is inserted into the mounting frame 35, and the end of the image guide 39 covered with the hard part 40 is fitted into the grip cylinder part 36 and fixed by the fixing screws 41... Fixed. The end surface of the image guide 39 is flush with the upper surface of the grip cylinder 36, and a mask 42 is fixed thereto. The mask 42 has a ring shape as shown in FIG. A plurality of notches 44 are formed, which are convenient for rotating when fixing. In addition, the upper surface of the grip cylinder part 36,
That is, the output end face of the image guide 39 is covered with a transparent cover 46 via a protective material 45, and this transparent cover 46 is connected to the presser body 4 screwed onto the grip cylinder 36.
It is held at 7. The axial positioning of the mounting frame 35 with respect to the support frame 27 using the support screws 37 is performed by inserting a spacer (not shown) into the gap 48 between the upper end surface of the support frame 27 and the lower surface of the grip cylinder 36. It can be done.

Further, the holding cylinder 21 is provided with a plurality of eyepiece cylinders 50 whose lower end portions are fitted onto the outer circumferential surface thereof and which are fixed at two positions in the circumferential direction by fixing screws 49 in the axial direction. A lens holder 52 holding an eyepiece lens 51 is inserted into the eyepiece tube 50 so as to be vertically movable. A first through hole 51a having a diameter smaller than the outer diameter of the eyepiece tube 50 is bored in the center portion of the upper end surface of the eyepiece tube 50, and a storage wall 52a that protrudes in the vertical direction is provided at the periphery. A connecting plate 54 having a plurality of claws 53 projecting radially outward from the lower end of the wall 52a is fixed by screws 55. On this connection plate 54, there is a concave groove 56 on the top surface.
The intermediate plate 57 having a female thread 58a formed thereon has a
It is fixed to the eyepiece tube 50 with screws 59 through a retaining plate 58 formed with a second through hole 60 formed in the internal female thread 58a of the retaining plate 58. A mounting plate 63 on which a cover glass 61 is held by a ring 62 is screwed onto the mounting plate 63 . This mounting plate 63 has a plurality of engagement holes 64...
is formed, the mounting plate 63 is removed from the holding plate 58 through the engagement holes 64, and the cover glass 61 is removed.
can be easily replaced. Further, the peripheral part of the intermediate plate 57 is a rounded part 57a.
The cover glass 61 is formed to prevent eye irritation or damage to the eyeglasses when the operator places his eyes on the cover glass 61. Note that a first O-ring 65 is provided between the connecting plate 54 and the intermediate plate 57.
A second O-ring 66 maintains liquid tightness between the intermediate plate 57 and the mounting plate 63. Further, a spring 67 is provided between the lens holder 52 and the connection plate 54 to bias the lens holder 52 downward.

On the other hand, the outer periphery of the eyepiece tube 50 has a large diameter portion 68a.
and a small diameter portion 68b, and a cam hole 6 in the small diameter portion 68b.
A photographing cam cylinder 69 having a hole 8 is rotatably provided. A rotation regulating groove 70 is bored in this photographing cam barrel 69, and a pin 71 screwed onto the eyepiece barrel 50 is engaged with this groove, and the rotation angle of the photographing cam barrel 69 is regulated by this pin 71. I'm starting to do that. On the outer periphery of the photographing cam barrel 69, a partition barrel 73 whose upper part is enlarged in diameter stepwise by a plurality of steps 72 is attached, and its lower end is connected to the eyepiece barrel 50 by screws 74.
It is fixed in place. In addition, the shooting cam tube 6
A spring 75 is interposed between the upper surface of the stepped portion 72 and the upper surface of the stepped portion 72 to bias the photographing cam cylinder 69 upward. Note that two ring-shaped sheets 76, 76 made of a lubricating material such as Teflon are provided on the upper surface of the stepped portion 72, and these sheets 76, 7
6 is designed to slide as the photographing cam cylinder 69 rotates. Furthermore, the partition tube 73
A diopter cam cylinder 7 with a cam groove 77 formed on its outer periphery.
8 is rotatably provided, and a diopter adjustment ring 79 is rotatably provided on the outer periphery of the diopter cam cylinder 78 in a liquid-tight manner via a third O-ring 78a. The diopter adjustment ring 79 is provided with an interlocking pin 80 protruding from its inner peripheral surface, and this interlocking pin 80
is engaged with an engagement groove 81 formed in the diopter cam cylinder 78. Therefore, the diopter adjustment ring 79
When the diopter cam cylinder 78 is rotated, the diopter cam cylinder 78 is interlocked with the rotation. A ring 78b is provided on the upper surface of the diopter cam barrel 78 to prevent the third O-ring 78a from falling down, and the diopter cam barrel 78 is also provided with a spring 67 that urges the lens frame 52 downward.
It is urged upward by a spring 78c that is stronger than the above.
Further, in the cam groove 77 of the diopter cam tube 78, a cam pin 82 protruding from the lens holder 52 is connected to a through hole 183 formed in the eyepiece tube 50 and the partition tube 73.
183 and a cam hole 68 formed in the photographing cam cylinder 69. Therefore, when the diopter cam cylinder 78 is rotated, the cam pin 82 moves up and down along the cam groove 77.
The lens holder 52 is designed to interlock with the lens holder 52. Furthermore, the upper end of the partition tube 73 and the connection plate 54
A photographing ring 83 is provided between the lower end of the storage wall 52a and the lower end of the storage wall 52a.
is rotatably provided in a liquid-tight manner via fourth and fifth O-rings 84a and 85a. An interlocking pin 84 is provided on the peripheral wall of the photographing ring 83, with one end protruding from the inner peripheral surface and the other end protruding from the outer peripheral surface. The groove 85 is engaged with the groove 85.
The other end of the interlocking pin 84 engages with a photographing adapter 85b attached to the claw portions 53 of the connection plate 54 by a payonet method. When the photographing adapter 85b is rotated by a predetermined angle to fix it, the photographing ring 83 is rotated via the interlocking pin 84, and the photographing cam barrel 69 is interlocked therewith.
When the photographing cam barrel 69 rotates, the lens holder 52 is raised together with the cam pin 82 through the cam hole 68 formed therein, and the eyepiece 51 held by the lens holder 52 is moved to the photographing position. It's getting old. A camera (not shown) is connected to the photographing adapter 85b, and when the camera is connected to the photographing adapter 85b, the camera is connected to the concave groove 56 of the connecting plate 54.
A contact pin 86 implanted in the contact pin 86 is adapted to make electrical contact. This contact pin 86 is used to send various photographic signals to the camera, and its lead wire 87 is soldered to the contact pin 86, and this soldered part is covered with a ring-shaped insulating member 88, and the soldered part is bent. It's getting worse. Above lead wire 8
7 passes through a passage 89 bored in the peripheral wall of the eyepiece tube 50 along the axial direction, and is guided from there to the universal cord 15 via the operating section 3 of the endoscope 1.

On the other hand, the lower end surface of the diopter adjustment ring 79 and the operation section 3
The first adjusting screw 26 and the second adjusting screw 33 are provided over the entire circumferential length between the upper surface of the main body 16 and the upper surface of the main body 16.
A gap 90 is formed through which the third adjusting screw 38 can be viewed. A sliding tube 91 having an outer diameter slightly smaller than the inner diameter of the diopter cam tube 78 is provided in the gap 90 so as to be movable up and down. As shown in FIG. 4, a plurality of grooves 92 are carved in the inner circumferential surface of the sliding tube 91 along the axial direction. The guide pins 93 are engaged with the guide pins 93 . Therefore, the sliding tube 91 is the guide pin 9
3. It can be moved up and down without rotating along... The outer peripheral surfaces of the upper and lower ends of the sliding tube 91 are kept liquid-tight between the main body 16 and the diopter adjustment ring 79 by sixth and seventh O-rings 94 and 95. Furthermore, external rings 96, 96, which are divided into two, are detachably attached to the outer peripheral surface of the sliding tube 91. That is, the outer ring 96 having a substantially semicircular arc shape has two threaded bodies 9.
7 and 97 (only one shown) are provided with a gap of about 150 degrees in the circumferential direction with their tips protruding from the inner circumferential surface,
The tips of these screw bodies 97, 97 are connected to the sliding tube 9.
It is detachably attached by engaging with a recess 98 formed on the outer circumferential surface of 1. Attachment grooves 9 are provided on the outer peripheral surfaces of the external rings 96, 96.
9 is formed, and a rubber ring 100 is attached to this attachment groove 99 to hold these appearance rings 96, 96 without wobbling. Further, the rubber ring 100 has a different color depending on the type of endoscope 1, so that the type of endoscope 1 can be easily identified.

According to the eyepiece device 14 configured in this way,
Various adjustments to the image guide 39 can be made as follows. First, the deviation in the rotational direction of the image of the output end face with respect to the image of the input end face is determined by the mounting frame 35.
is held in the support frame 27 by the support screws 37 .
The mounting frame 35 is positioned in the rotational direction.
Thereafter, the mounting frame 35 is held to the support frame 27 by the support screws 37, and the spacer is removed from the gap 48, so that the entire eyepiece 14 is assembled.

After assembling the eyepiece 14, before attaching the appearance rings 96, 96 to the outer circumferential surface of the sliding tube 91,
This sliding tube 91 is raised as shown by the chain line in FIG. 2 to open the gap 90. Then, by first moving the adjustment tube 24 up and down using the first adjustment screw 26, the support frame 27 is interlocked with this movement, so that the exit end surface of the image guide 39 is positioned along the axial direction of the eyepiece 51. be able to. next,
By displacing the support frame 27 in the radial direction using the second adjusting screws 33, the axis of the image guide 39 can be aligned with the axis of the eyepiece 51. Furthermore, since the mounting frame 35 can be forcibly swung about the support screws 37 by the third adjustment screws 38, the inclination of the output end surface of the image guide 39 can be adjusted to
1 axis at right angles.

That is, according to the eyepiece device 14 having the above configuration,
Since various adjustments to the image guide 39 can be made independently using the first to third adjustment screws 26, 33, 38 and the support screw 37, the adjustment work can be made easier and more reliable.

Further, according to the eyepiece device 14 having the above configuration, the diopter cam barrel 78 is rotated in conjunction with the diopter adjustment ring 79 by the interlocking pin 80, but is free in the axial direction. Therefore, the lens holder 5
2, so even if the diopter adjustment ring 79 moves in the axial direction depending on how much force is applied when adjusting the diopter, the diopter will change accordingly and the diopter adjustment will be difficult. It's never difficult. Furthermore, the diopter adjustment ring 79 and the photographing ring 83 are
O-rings 78a, 95, 84 are free in the radial direction
Since it is only supported by a and 85a, it can be easily rotated with a light force. In addition, the diopter adjustment ring 79 and the photographing ring 8
3 is because a partition tube 73 is interposed between these so that their rotations do not interfere with each other, so the original diopter can be reliably maintained after the camera is removed. . Furthermore, since the mounting structure of the appearance rings 96, 96 to the sliding tube 91 is simply that the screw body 97 provided on the appearance ring 96 is engaged with the recess 98 formed in the sliding tube 91, Unlike when tightening and fixing with screws, there is no possibility that the screws will become rusty and cannot be easily removed.

[Effect of idea]

As explained above, according to the present invention, when adjusting the end portion of the image guide, particularly when adjusting the tilt, interference such as the mounting frame hitting the support frame does not occur. Therefore, adjustments can be made easily and accurately. In addition, by using the gap between the mounting frame and the support frame that face each other in the optical axis direction, inserting a spacer into this space, and positioning the optical axis direction, etc., it is easy to adjust the positioning, and other It does not shift when adjusting the orientation, and adjustment is easy.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention, in which Fig. 1 is an overall view of an endoscope, Fig. 2 is a sectional view of the eyepiece, Fig. 3 is a plan view of a mask provided on the exit end surface of the image guide, and Fig. FIG. 4 is a cross-sectional view of the sliding ring. 27...Support frame, 35...Mounting frame, 37...Support screw, 38...Adjustment screw (third), 39...
Image guide, 51...eyepiece.

Claims (1)

[Scope of utility model registration request] A mounting frame to which the end of the image guide is attached,
The mounting frame has a support frame supported by the eyepiece main body and has a screw for adjusting the inclination of the mounting frame, and the mounting frame is supported by the support frame via the support screw. An eyepiece device for an endoscope, characterized in that the eyepiece device is arranged apart from the support frame in both the radial and axial directions without being in direct contact with the support frame.