JPS622227A - Eyepiece device for endoscope - Google Patents

Abstract

PURPOSE:To shorten the whole length of an eyepiece part, to reduce the weight and size of the device, to reduce user's fatigue and to make the handling of the device easy by sliding and receding a diopter adjusting ring in addition to an ornamental ring. CONSTITUTION:The diopter adjusting ring 66 is airtightly fitted to the outer periphery of the lower end of a hood 56 through an O-ring on the outside of an operation ring 62 so as to be optionally moved in the rotational and axial directions. Namely, the diopter adjusting ring 66 rotates the operation ring 62 through an engaging pin 67 engaged with an engaging oblong hole 65 at its operation. Since the oblong hole 65 and the pin 67 are engaged with each other so as to be slided in the optical axis direction, the diopter adjusting ring 66 can be slided in the same direction. The ornamental ring 71 is airtightly engaged between the body 16 of an operation part 3 and the diopter adjusting ring 66 through O-rings 72, 73. The accessory ring 71 can be moved to the diopter adjusting ring 66 side.

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to an eyepiece device for an endoscope.

[Conventional technology]

Generally, a diopter adjustment ring is attached to the eyepiece of an endoscope to adjust the distance between the eyepiece and the image guide end surface in accordance with the diopter of the user. Since this diopter adjustment ring is operated with a finger, it needs to be at least as wide as the thickness of a finger. On the other hand, the end surface of the image guide requires adjustment such as centering with the center of the eyepiece and focusing with respect to the film surface of a photographic device attached to the eyepiece. For this reason, conventional eyepieces are provided with various adjustment screws on their side surfaces.

However, since the adjustment screw is visible after adjustment, a ring is provided to cover the adjustment part, and the ring is retracted when making adjustments, and then returned to its original position to cover the adjustment part during normal use. Make it.

[Problem that the invention seeks to solve]

When performing the above-mentioned optical adjustment, the wider the opening of the exposed adjustment section, the easier the operation will be, but in this case, the sliding amount of the decoration ring must be increased.

This requires making the eyepiece longer, making the entire eyepiece larger and heavier, making it less convenient to use.

Also, since the eyepiece and 'flll's base ring is moved to the diopter adjustment ring side, and the diopter adjustment ring is completely covered, for example, when focusing the end face of the image guide, In some cases, this may have to be repeated many times to confirm reproducibility later. In other words,
Workability was extremely poor.

The present invention has been made in view of the above-mentioned problems.The purpose of the present invention is to reduce the fatigue of the user by reducing the size of the entire eyepiece, and also to enable simultaneous viewing while adjusting the image guide. To provide an eyepiece device for an endoscope, in which the reproducibility can be easily checked by rotating the convergence knob from 1 to 1, and furthermore, the shading ring can be largely retracted to improve the workability of the adjustment section. .

[Means and effects for solving the problem] A decoration ring 71 that covers the optical adjustment section is attached to the outer periphery of the eyepiece section 14 of the endoscope I, so that the decoration ring 7I can be retracted from the optical adjustment section. It can be slid freely. Furthermore, the diopter adjustment ring 66 attached to the outer periphery of the eyepiece I4 is slidable separately from the decoration ring 7I and is retracted to a position where it is not completely covered by the retracted decoration ring 7Z, and even when this retraction is done, the diopter adjustment ring 66 is
1ffi clause is possible.

[Actual example]

Hereinafter, a practical example of the present invention will be explained with reference to the drawings.

Reference numeral 1 in FIG. 2 denotes an endoscope, which consists of an insertion section 2 for inserting the endoscope and an operation section 3. The insertion section 2 includes 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. At the same time, the tip of the forceps channel 9 is open.

The operation section 3 includes an operation knob 10 for remotely controlling the bending pipe section 5, an air/water supply switching valve 11, a suction operation valve 12,
A sliding forceps insertion port body 13 communicating with the forceps channel 9, an eyepiece I4 optically connected to the observation window 7 as described later, and a light source device (not shown) connected to the illumination light from the light source device to illuminate the above-mentioned illumination. A light guide that emits light from the detector (
A universal cord 15 (not shown) is provided.

The eyepiece section I4 is constructed as shown in FIGS. 1, 3 to 5. That is, a mounting hole 17 is provided in the main body 16 of the operating section 3, and a gap 18 formed around the mounting hole 17 has a ferrule 19 at the lower end, and is connected to the main body 16 through the flange 19. Holding cylinder body 2 fixed with screws 20
1 is provided. 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 an Ifrv-shaped cross section is formed on the outer circumferential surface of the adjustment cylinder 24 . The conical tip of the screw 26 is engaged. Therefore, the first
By screwing in the adjustment screw 26, the adjustment cylinder 24 can be displaced in the axial direction of the adjustment cylinder 24.

A support frame 27 is inserted into the adjustment cylinder 24 and is formed by connecting a first cylinder part 27a and a second cylinder part 27b. A collar 28 is provided on the outer peripheral surface of the first cylindrical portion 27B of the support frame 27, and a step portion 29 is provided on the outer peripheral surface of the second cylindrical portion 27B, and a second
An engagement groove 30 is formed. A spring 31 is interposed between the collar 28 and the upper end surface of the holding cylinder 21 to bias the support frame 27 in the upward direction.
The second engagement groove 30 engages with a protrusion 32 protruding from the inner circumferential surface of the adjustment tube 24 to prevent the support frame 27 from rising due to the biasing force of the spring 31. A plurality of threaded second adjustment screws 33 (only one cage is shown) are engaged. Therefore, by adjusting the first adjustment screws 26..., the support frame 27 can be displaced in the vertical direction (c-axis direction) together with the adjustment tube 24, and by adjusting the second adjustment screws 33... It is designed to be displaced in the direction. A fixing screw 34 is screwed into the peripheral wall of the holding cylinder 2 to fix the adjustment cylinder 24 to the holding cylinder 21 once the adjustment cylinder 24 has been positioned in the axial direction.

A light guide 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 of the protective cylinder part 35a, which has a larger diameter than the protective cylinder part 35a. The outer periphery of the upper end portion of the support frame 27 is swingably supported by a plurality of, for example, three support screws 37 screwed into the support frame 27. This mounting frame 35 is attached to the second cylindrical portion 27b of the support frame 27.
A plurality of third adjustment screws 38 screwed into the outer peripheral wall of the...
- The inclination can be forcibly adjusted using the support screws 37 (only one is shown) as a fulcrum. Further, an end portion of an image guide 39 is inserted through the mounting frame 35 and is covered with a hard portion 40 .

The distal end of 39 is fitted into the grip cylinder 36 and fixed by fixing screws 41... Image guide 3
The end surface of 9 is flush with the upper surface of the grip cylinder 36, and a mask 42 is fixed thereto. Further, the upper surface of the grip tube 36 , that is, the output end surface of the image guide 39 is covered with a transparent cover 46 , and the transparent cover 46 is held by the grip tube 36 . Note that the support screws 37 of the mounting frame 35...
The axial positioning with respect to the support frame 27 by
This is done by inserting a spacer (not shown).

(9) The holding cylinder 21 is provided with an eyepiece cylinder 50 whose lower end part is fitted onto the outer circumferential surface of the holding cylinder 21 and which is fixed in plural places in the circumferential direction and at two places in the axial direction by fixing screws (not shown). It is being A lens holder 52 holding an eyepiece lens 5I is inserted into the eyepiece tube 50 so as to be vertically movable. An intermediate cylinder 53 is fitted onto the outer periphery of the upper end of the lens holder 52, and the lower end of this intermediate cylinder 53 is fitted over the outer periphery of the upper end of the eyepiece cylinder 50 and is connected and fixed by a screw 54. In other words, this intermediate cylinder 53 is fixedly provided.

The lens holder 52 can be moved in the direction of its optical axis using the inner periphery of the intermediate cylinder 53 as a guide. Further, between the intermediate tube 53 and the lens holder 52, a spring 55 wound around the outer circumference of the lens holder 52 urges the lens holder 52 downward.

Further, a hood 56 is fitted onto the outer part of the intermediate cylinder 53, and both are fixed with screws 57. food 5
The frame 5 is attached to the opening of 6 to hold the cover glass 58.
9 is fixed. In addition, the hood 56 and the frame 59 are installed.
What is it? It is sealed by a ring 60.

On the other hand, an operating ring 62 is fitted onto the outer periphery of the eyepiece tube 5o and rotates while being positioned in the optical axis direction between a stepped end surface 61 formed on the eyepiece tube 50 and the intermediate tube 53. . The operating ring 62 has a cam elongated hole 62 into which a cam bin 63 protruding from the lens boulder 52 is fitted.
m is formed in a spiral shape. Further, a guide hole 64 along the optical axis direction is formed in the eyepiece tube 5o in correspondence with this operating ring 62, and a guide bin 63 is also formed in this guide hole 64.
is inserted. By rotating the operating ring 62, the guide bin 63 is moved along the cam elongated hole 63, and this movement is restricted by the guide hole 64 only in the optical axis direction.

Furthermore, an engagement elongated hole 65 is formed along the outer circumference of the operating ring 62 in the optical axis direction VcFi. And: The tip of an engagement pin 62 screwed and fixed to a diopter adjustment ring 66', which will be described later, is fitted into this long engagement hole 65.
It engages in a slidable manner in the optical axis direction.

The diopter adjustment ring 66 is provided on the outside of the operating ring 62 and between the outer circumference of the lower end of the hood 56 via an O-ring 68 so as to be rotatable and movable in the optical axis direction in a liquid-tight state. That is, by rotating this diopter adjustment ring 66, the operating ring 62 is rotated via the engagement pin 67 that engages with the engagement elongated hole 65. Further, while the engagement elongated hole 65 and the engagement pin 67 are engaged so as to be slidable in the optical axis direction, the diopter adjustment ring 66 can be slid in that direction.

The slide width is as shown in Figure 2! , is.

As shown in FIG. 4, a fixing screw 69 is attached to the diopter adjustment ring 62, and the tip of the fixing screw 69 is inserted into a hole 70 formed in the operating ring 62. Tsuma, su,
A fixing screw 69 fixes the diopter adjustment ring 66 and the operating ring 62. If this engagement is removed, the operating ring 62 can rotate.

Further, the eyepiece tube 5 is located at the lower end side of this diopter adjustment B ring 66.
A decorative ring 71 is fitted on the outside of the decorative ring 7.
0 is fitted between the main body 16 of the operating section 3 and the diopter adjustment ring 66 through QIJ rings 72 and 73 in a liquid-tight manner. Further, this decoration ring 7z can be moved toward the diopter adjustment ring 66 side. However, it is usually located at the location shown in Figure 1.
It is fastened and fixed to the eyepiece tube 50 by a plurality of set screws 14 . Then, by loosening the setscrews 74..., the decoration ring 7I moves and retreats toward the diopter adjustment ring 66 by a width of j along the optical axis direction, exposing the eyepiece tube 50. The gap 75 can be opened. Further, in the portion of the eyepiece barrel 50 that is exposed at this time, the first adjustment screw 26, the second adjustment screw 33, . . . , the fixing screw 34, and the third adjustment screw 38, . The optical adjustment section is constituted by these openings. In other words, if the decoration ring 7I is retracted, each of the screws 26, 33, . . .
34.38... can be operated.

Further, when both the diopter adjustment ring 66 and the decoration ring 71 are moved toward the hood 56, they overlap at their terminal ends, but they do not overlap completely, and a portion of the periphery of the diopter adjustment ring 66 overlaps. portion is exposed to the outside, and the diopter adjustment ring 66 can be rotated through this exposed portion.

According to the eyepiece device Z4 configured in this way, various adjustments of the image guide 390 can be performed as follows. First, the deviation in the rotational direction of the image of the output end surface with respect to the image of the input end surface of the image guide 39 is determined by the rotational direction of the image of the output end surface of the image guide 39 being determined by Gap 4 between the bottom surface of the cylinder part 36
A spacer (not shown) is inserted in 8 to position the mounting frame 35 in the rotational direction. Thereafter, the mounting frame 35 is held on 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 this eyepiece device 14, the next step is diopter adjustment P! 96
Remove the fixing screw 69 of No. 6 to make the diopter IA blood ring 66 slidable in the optical axis direction.

Further, the setscrews 24 of the decorative ring 71 are loosened, so that the decorative ring 71 can be slid in the optical axis direction. Therefore, the diopter adjustment Wi ring 66 and the decoration ring 7I are moved to the hood 56 side. The diopter adjustment ring 66 moves by 11, and the second diopter ring moves by 1! with respect to the diopter adjustment ring 66.
1 along with its diopter adjustment ring 62! ,, that is, it,
+l, move a distance. The decoration ring 21 overlaps the diopter adjustment ring 66 with a portion left behind. Kyo and others open the gap 75 by retracting the decoration ring 7, and open the opening for each operation.
... are exposed to the outside, so each of the screws 26, , ? in the optical adjustment section is exposed from this. 3...

You will be able to operate 34.38... Therefore, first, by moving the adjustment tube 24 up and down with the first adjustment screw 26, the support frame 27 will be linked to this movement, so that the exit end surface of the image guide 39 can be positioned along the axial direction of the eyepiece 51. I can do it. Next, by displacing the support frame 27 in the radial direction using the second set screw 33, the axis of the image guide 39 can be precisely aligned with the eyepiece lens 51. Roughly, third adjustment screw 38
... allows the mounting frame 35 to be forcibly swung about the support screws 37, so that the inclination of the exit end surface of the image guide 39 can be adjusted to the angle of the eyepiece lens 5.
It can be placed in a standing position perpendicular to the axis of 1.

Further, during the adjustment, for example, after focusing, the diopter adjustment -66 is rotated in order to confirm the reproducibility. In this case, as described above, the diopter adjustment ring 66 is retracted so as to be exposed from the decoration ring 71 at least as much as possible for rotational operation. Therefore, the diopter adjustment ring 66 can be attached immediately without returning the decoration ring 7I to its original position.

Optical in this way? After the JiA adjustment is completed, the bevel ring 71 and the diopter adjustment ring 66 are returned to the positions shown in FIG. 2 in order. Then, the decorative ring 71 is fixed in that position by set screws 74... Also, the diopter point P@66 is set to 1 by inserting the fixing screw 69 into the hole 7o. The I Ri ring 66 and the operating ring 62 are fixed and connected to rotate together.

Note that the present invention is not limited to the configuration of the above embodiment. For example, f@7r may be retracted as a slide in the opposite direction to the above-described retraction direction.

〔Effect of the invention〕

As explained above, according to the present invention, not only the diopter ring but also the diopter imaginary ring is slid and retracted, so it is necessary to provide a retraction space for the diopter ring in advance to avoid diopter adjustment E heating. There is no. Therefore, the entire length of the eyepiece can be shortened to that extent, making it extremely compact, reducing user fatigue, and making it easier to use. Furthermore, since the diopter adjustment ring can be operated while making optical adjustments without having to return the diopter, it is easy to check the reproducibility of focusing. Furthermore, since the diopter adjustment iff is also made to slide, the aperture of the optical IAI adjustment section can be made wide, or the amount of retraction of the decoration ring can be made sufficiently large. Therefore, the adjustment work of the optical adjustment section becomes easy.

[Brief explanation of drawings]

The drawings show an example of a live cannon of the present invention, in which Fig. 1 is a perspective view of an endoscope, Fig. 2 is a side sectional view of its eyepiece, and Fig. 3 is a view taken along the line ``G'' in Fig. 2. 4 is a cross-sectional view taken along IV-I in Figure 2.
FIG. 5 is a cross-sectional view taken along the line V in FIG. 2. FIG. ! ...Endoscope Z4...Eye piece 66...Diopter adjustment ring 76...Kagiri Tamaki Applicant's agent Patent attorney Jun Tsuboi Figure 2 Figure 5 Commissioner of the Patent Office Mr. Michibe Uga 1. Indication of the case Special No. 41 Sho 60-141201 No. 2, Name of the invention Eyepiece device for internal vision 3, Person making the correction Relationship to the case Name of the patent applicant (037) Olympus Kokouji-Masashikikai? 14
, Agent 7, Contents of amendment (1) Changed "Kogiwa" in line 8 of page 2 of the specification to "Mezawa"
Correct to. (2) Correct "light" in the first line of page 7 to "image". (3) Correct "intermediate cylinder 53" on page 8, line 19 of the same page to "eyepiece cylinder 50". (4) Correct "cam elongated hole 63" in the second line of page 10 to "cam elongated hole 62a". (5) Change “Figure 2” on page 10 @ line 19 to “Figure 1”
Correct it to ``Figure''. (6) Correct "62" in the first line of page 11 to "66". (7) Correct "70" in the 9th line of page 11 to "71". (8) Correct "the deviation in the rotational direction" from lines 17 to 18 on page 12 to "the approximate position in the optical axis direction". (9) Correct "rotation direction" in the second line of page 13 to "optical axis direction". 01 Same f @ page 16, line 18, replace “76” with “71”
Correct to. (b) Correct the figure of 1 in 1 plane as shown in the attached sheet.

Claims (1)

[Claims] an eyepiece section with an optical adjustment section on the side surface; a slidable ornament ring attached to the outer periphery of the eyepiece section that covers the optical adjustment section and can be retracted from the optical adjustment section; An eyepiece device for an endoscope, characterized in that it is equipped with a slidable diopter adjustment ring which is attached and can be slid and retracted to a position where it is not completely covered by the retracted decoration ring.