JPS58188424A - Diagnostic apparatus of body cavity - 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 diagnostic device for a body cavity such as a casing, and more particularly to an intrabody cavity supply/disconnection device VC that has an improved watertight structure for a casing of an operating body that can be operated from the outside of a casing.

In general, the Uiho-kuman performs various operations on the operating section, but in each case, the mechanism inside the operating section is operated from the outside via an operating shaft that passes through the casing. Generally speaking, it is difficult to make a structure that penetrates the endoscope watertight.
1. It is desirable to clean and disinfect the entire endoscope.

Therefore, a method of inserting an O-ring into the gap between the through hole of the casing and the operating shaft was devised.

However, with this method, if the center of the operating shaft is even slightly eccentric with respect to the through hole in the casing, the eaves of the O-ring will be offset, increasing frictional force, and this will cause the operating shaft to rotate. If the O-ring becomes heavy or the water nectar performance of the seventh O-ring becomes opaque, causing water leakage,
There are drawbacks such as the ring being damaged in a short period of time.

Another method is to fit a flexible tube onto the operating shaft, and fix one end of the tube to the operating shaft in a watertight manner, and the other end to the case song side. However, there were problems in that the rotational range of the operating shaft was limited by the twisting tolerance of the flexible tube, the operation became difficult, or the tube could break. In this method, a rotating ring is fixed to the other end of the tube so that the rotating ring can be rotated in a watertight manner with respect to the casing. However, even with this method, the structure of the paddy field is complicated and there is considerable operational resistance, and the tube itself is still screwed, so the above-mentioned disadvantages such as poor durability could not be solved. The objective was to reduce the amount of force needed to operate the operating body that is operated from outside the watertight casing, and improve the sealing performance and durability without limiting the operating range. The purpose of the present invention is to provide an intrabody cavity diagnostic device that can perform the following tasks.

Hereinafter, each embodiment of the present invention will be described based on the drawings.

First, the 10th embodiment will be explained based on FIGS. 1 and 2. In this first embodiment, an endoscope is used as the body cavity diagnostic device 7. 1 in FIG. This endoscope *J is composed of an operating section 2 and an insertion section 3. The insertion section 3 is formed by connecting a distal end portion 6 to the distal end of a flexible tube 4 via a curved tube 5, and the curved tube 5 has a plurality of bent joint rings 7 arranged in its axial direction, and Adjacent pieces are rotatably attached to each other, allowing them to bend in both directions, for example, up and down. A pair of operating wires 8.8 are inserted into the insertion portion 3 so as to be freely advanced and retracted. The proximal end of the tube 50 can be bent up and down by introducing the proximal end of the tube into the operating section 2 and pushing and pulling the bending tube 50 by a bending operation mechanism 9, which will be described later. Further, as shown in FIG. 2, the main body of the operating section 2 consists of a front cover 12 and a back cover 13 that constitute a watertight casing 11, and a substrate 14 as a base is interposed between the two force bars 12 and 13. In addition, for each cover 12 and 13, the base plate 14 has f'L/-le sheets 15 and 1 on both sides of the cover 12 and 13, respectively.
6 through n and tightening screws 17.
and is fastened and fixed by a nut 18.

On the other hand, the bending operation mechanism 9 is incorporated into the rice field caning J1. This bending operation mechanism 9 is constructed as follows.

That is, the substrate 14Vc and the rotary bearing J9 are fixedly attached, and the base end of the rotary shaft 210 of the wire hoisting drum 20 is freely inserted into the rotary bearing 19, and the rotary shaft 2) and the rotary shaft 2) are On the end side, there is a through hole 22 formed in the front cover 12VC.
It protrudes outward through. A bending operation knob 23 is attached to the end of the rotating shaft 2 protruding outside, and the wire winding drum 20 can be rotated with the rotation 1M22 of the bending operation knob 23.

Further, an O-ring 24 for sealing is inserted between the through hole 22 and the rotation 'if@21. The end of the rotary shaft 21 to be fitted into the rotary bearing 19 is formed to have a larger diameter than the other parts.The large diameter portion 25 is fitted into the rotary bearing 19, and the end face of the large diameter portion 250 is tightened with a nut. 26 to prevent it from coming off. The base end sides of the operating wires 8, 8 are attached to the surface of the wire winding drum 20 so as to be wound from the reflective side, and the wire winding drum 20 cannot be rotated.
This allows all of the operating wires 8.8 to be pushed and pulled together. Furthermore, gear 2 is rotated 11i14121.
7 are coaxially fixed. This gear 27 is connected to a brake mechanism 28 installed on the side of the bending operation mechanism 9.

The brake mechanism 28 is constructed as follows. That is, one end of a guide shaft 29 is fixedly attached to the base plate 14, and a brake gear 30, a friction plate 31, a disc spring 32, and an axial rotating shaft are sequentially mounted on this guide shaft 29 toward its tip side (other end side). The bodies 33 are coaxially fitted together.

The axially rotating body 33 serves as an operating member for operating the brake mechanism 28.

- 10,000, the brake gear 30 is the large diameter portion 29 of the guide shaft 29
The gear portion 30 is rotatably fitted to the gear portion a.
g is engaged with the gear 27 of the bending operation mechanism 9. That is, when the gear 27 on the bending operation mechanism 9 side rotates, this brake gear 30 also rotates in conjunction with the rotation.

The friction plate 3J has a friction member 31R integrated with the back plate 31b.
The friction member 91a is brought into pressure contact with the bottom (8) of the recess 30b formed in the upper lobby brake carrier 30. Furthermore, the back plate 31b has a square hole 35 in its center, and this hole 35 is connected to the guide shaft 2.
It is fitted into a corner 36 of a rectangular cross section formed in 9, and is mounted so that it can move in the axial direction as a whole, but cannot rotate. In other words, the friction plate 91 moves only in the axial direction along the guide shaft 29 and cannot rotate.

The axial rotating body 33 has a female threaded portion 37 at its center,
This female threaded hook 31 is screwed into a male threaded portion 38 formed corresponding to the guide shaft 29.
The rotating lever itself moves in the axial direction of the guide shaft 29.

Incidentally, the disk spring 32 is interposed between the friction plate 31 and the portion 33h of the axially rotating body 330.

As described above, the axial rotor 33 is rotatably supported by the guide shaft 29, and the shaft protrudes to the outside through the negative through hole 39 formed in the wall of the front cover 12 formed in the honeycomb casing J1. There is a section 40. A brake operation lever 41 is attached to the narrowed outer end of the TKBm 40, so that the shaft rotary body 33 can be rotated from the outside. The above-mentioned through hole 39VC is at the axial position t4
The a-core absorbing member 42 is fixedly attached using a nut 43. The axial position eccentricity absorbing member 42 consists of a cylindrical portion 42a through which the axially rotating body 33 is inserted, and a cylindrical portion 42b extending integrally from the inner end of this cylindrical portion 421L, and the axially rotating body 33 as a whole It is formed into a ring shape that can be fitted onto the outer circumferential portion of 33. The flange portion 42b is located inside the watertight casing J1 and faces the inner surface of the periphery of the N through hole 39. A groove 45 is formed in the opposing surfaces along the opening direction, and this groove 45
A first watertight elastic backing 46 formed in a ring shape is fitted into the ring. The watertight elastic backing 46 is interposed in the gap formed between the flange 42b and the watertight casing 11 to tightly block the gap. By the way, this collar part 42b
and each opposing portion of the watertight casing 11 facing this,
A pair of opposing surfaces are formed which face each other parallel to each other along the radial direction of the axially rotating body 33, with an elastic backing 4t interposed therebetween. Therefore, even if the dynamic rotating body 33 moves in its radial direction, it does not cause any trouble to the elastic backing 41 or the like. Further, a second watertight elastic backing 47 formed in a ring shape is inserted between the cylinder s42& of the member 42 and the outer periphery of the shaft rotating body 33 into which it is fitted, and between the two. It is designed to be watertightly shut off.

The through hole 39 has a cylindrical portion 4 of the axial position eccentricity absorbing member 42.
2a passes through, and this through hole is formed, and the assembly in the radial direction between the watertight casing 11 and the cylindrical portion 42& of the member 42 forms a gap sI for absorbing positional errors. There is.

On the other hand, the rotary bearing J9 and the guide shaft 29 are provided with positioning protrusions 19a and 29b on their proximal surfaces, and these are fitted into the positioning holes 47 and 48 formed in the substrate 14, respectively, to ensure proper positioning. In addition to determining the relative positions fife and K, the installation is fixed using set screws 49...VC. Further, as described above, the front cover 12 and the back cover 13 are connected to the tightening screws 17.18 and nuts 17a via the sealing sheet 15.16 and the base plate 14.
, 18a, the insertion holes 14a through which the tightening screws 17 and 18 are inserted are made larger than the outer diameter of the tightening screws 17 to provide a margin. Shifting the overlapping position of the substrate 14 2
)K can do it. Therefore, the rotating shaft 2 can be accurately aligned with the through hole 22 of the front cover 12.

The bending operation mechanism 9vC is connected to the wire winding drum 2.
A stopper (not shown) is provided to restrict the amount of rotation at zero. The brake mechanism 28 also includes a stopper (not shown) that restricts the amount of rotation of the axially rotating body 33.

) has been established.

Next, an inside look at this example! ! ! The effect of No. 1 will be explained. “
First, when operating the bending tube 5 of the insertion section 3 to change the direction of the tip end 6 in bending 1~, press the brake operating lever 4.
Rotate the button to the free side. In other words, the axial rotating body 3
3 rotates the shaft rotor 33 so as to move it in the direction of retracting from the friction plate 31. Then, the shaft rotor 33 retracts from the friction plate 3J side.) Disc plate 32
During this retraction, the brake gear and qot1c friction plate 3 are not pressed, so no KJI pressing force is generated during this period. The brake gear 30 straddles the bending operation mechanism 9
The gear 27Vc can freely rotate around the guide shaft 29 while being engaged, and the brake is not applied.

Therefore, when the bending operation knob 23 of the bending operation mechanism 9 is turned in one direction, the wire winding drum 2° rotates to wind in one operating wire 8 and let out the other operating wire 8. Therefore, the bending tube 5 can be bent toward the puller operation wire 8 side. As mentioned above, this operation does not involve applying the brakes, so it can be done with light force.

On the other hand, when the brake operating lever 41 is turned to the opposite side, the axial rotating body 33 moves toward the N diaphragm 31 side, and the disk spring 32
Press Y to press the brake gear 3°K friction plate 3. Therefore, a frictional force is generated between the brake gear 30 and the friction plate 31, and since the friction plate 31 is originally not rotatable, the brake gear 30 is also fixed. wife.

9. Fix the gear 27 that engages the brake gear 30Vc,
A brake is applied to the bending operation of the bending operation mechanism 9. Therefore, the curved tube 5 can be fixed in its curved state. Also, while this brake is applied, the bending operation knob 2
If you don't strongly turn 3, you can make slight adjustments to the curve.
Ru.

On the other hand, when assembling the cloth cover 12, the good cover 13, the board 14, the bending operation mechanism 9, and the brake mechanism 28 in the configuration of the above embodiment, the following points should be taken into account. That is, when positioning the front cover 12 with respect to the substrate 14, the rotating shaft 2 of the bending operation mechanism 9 is accurately aligned with the through hole 22 of the clothing cover 12, and the attachment is fixed. However, for this reason, the axial rotating body 33 of the brake mechanism 28 is eccentric with respect to the through hole 39 due to a machining error.

However, between these two, the actual difference is that the axial position eccentricity absorbing member 4
2 and the through hole 39, there is a gap S1 for absorbing positional errors in the assembly in the radial direction, so the member 42 does not come into contact with the inner wall of the through hole 39. Therefore, when the front cover 12 is attached to the board 14, the through hole 3
There is no problem even if the position of the guide 9 is out of alignment with the guide I29.

Further, the above member 42 is positioned with respect to the front cover 12VC of No. 7 by pressing the first elastic backing 46 for water honey, and the member 42 and the collar portion 19 of the shaft rotating body 33
3a, there is a sufficient gap in the axial direction, so it will not hit during normal operation.

Furthermore, the axial rotating body 33 is attached to the guide shaft 29 which is rigidly fixed to the base plate 14, and the radial assembly between the cover 12 and the cover 12 has a positional error of N. Since the gap S for suction W is provided, square holes will not be formed in the front cover 12 etc. even if the axially rotating body is subjected to a strong force in the radial direction of 93vC.

Therefore, the front cover 12 can be made of any material such as synthetic resin.

Next, a second embodiment of the present invention will be described with reference to FIGS. 3 and 4.

This second embodiment is a treatment instrument raising operation mechanism 6 of an endoscope 61.
2Vc was applied. As shown in FIG. 3, the endoscope 6 has an insertion section 64 connected to an operating section 63, and a channel 66 through which a treatment instrument 65 is inserted is formed inside the insertion section 64.

The distal end of the channel 66 is open at the distal end of the insertion section 64, and the treatment instrument 6 is placed within this opening s66a.
An inductor 67 is pivotally mounted to regulate the direction in which 5 is led out.

An operating section 63 is inserted through the insertion section 64 at the tip of the inductor 67.
The tip of the operating wire 68 guided to the side is connected, and the spindle 67 is moved by heavily operating the operating wire 68 using the treatment instrument raising operating mechanism 62 provided in the operating section 63. The treatment instrument 65 is raised by rotating as appropriate.

The treatment instrument raising operation mechanism 62 is incorporated into the operation@SS as shown in FIG. The main body of the operating section 63 is formed by fitting a substrate 70 as a base into the opening of a watertight casing 69 to form a case body 7. axis 7
2 is fixed. This guide shaft 72 has a pinion 73
is attached so that it can rotate freely.

The pinion 73 engages with a rack 74 that operates the operating wire 68 to move the rack 74 forward. The rack 74 is fitted to and guided by the base plate 70vc and the fixed cylinder 75. Pinion 73 is/
It engages with the chic 74 via a window s76 formed in the cylinder 75. The watertight casing 69YC has a through hole 77
71. A rotary member 78 as an operating member supported by the guide shaft 72 passes through this through hole 77 and projects to the outside. In other words, this rotating member 78 penetrates the guide shaft 72 and is rotatably attached to the guide shaft 22. Note that the pinion 73 is formed integrally with this rotating member 78.

By the way, a flange portion 79 is integrally formed in a portion of the rotating member 78 that corresponds to the through hole 77 . In addition, an axial #eccentricity absorbing member 8 is fitted into the through hole 77, and the fitting peripheral surface of this member 81 and the through hole 770 are connected to each other.
A first elastic backing 82 formed in a ring shape is inserted between the ring and the circumferential surface. This elastic backing 82 is partially fitted into a groove 83 formed on the fitting circumferential surface of the member 81.

Further, an insertion hole 84 is formed in the center of this member 8 and is constricted through which the end of the rotating member 78 is inserted. By making the diameter of this insertion hole 84 larger than the outer diameter of the insertion portion of the rotating member 78, the insertion hole 84 is
Between the inner circumferential surface of No. 4 and the outer circumferential surface of the rotating member 78, there is a gap S for radial assembly position and error absorption. It is designed to form a

Further, the flange portion 79 of the rotating portion @78 faces the inner surface of the watertight casing 69 from the inside of the watertight casing 69 with respect to the axial position eccentricity absorbing member 81. When these opposing portions are white along the radial direction of the rotating member 78 and are opposed to each other in parallel, they form a pair of opposing surfaces with an elastic backing 85 interposed therebetween. Even if it moves in the radial direction, it does not affect the elastic backing 85 or the like. An M2 elastic backing 85 formed in a ring shape is interposed between the two members 78 and 81. This elastic backing 85 allows watertight communication between the two members 78 and 81. Note that the elastic backing 85 is partially fitted into a groove 86 formed in the axial position eccentricity absorbing member 81Vc. Further, the axial position eccentricity I&accommodating member 81 is connected to the flange portion 79 by a nut 87VC screwed onto the outer end of the rotating member 78.
It is designed to be tightened to the side. Further, an operating lever 88 is fixedly attached to the outer end of the rotating member 78.

The watertight casing 69 and the substrate 70 are each made of synthetic resin, for example, and an engagement recess 85 is formed at the periphery of the opening of the watertight casing 69, and the engagement recess 89 is elastically deformed by the base plate 70. It is designed to fit in using. Therefore, the positional relationship between the two is uniquely determined. Note that an elastic backing 90 is interposed between the engagement portions.Next, the operation of the endoscope 61 of this embodiment will be explained. When the treatment instrument 65 inserted through the channel 66Vc is lifted up, the operation lever 88 is rotated in the spring. That is, when the operating lever 88 is rotated, the rotating member 78 rotates together with the lever, the binion 73 rotates, and the rack 74 moves.
Pull the operating wire 6B. This causes the inductor 67 to be raised and the treatment instrument 65 to be raised.

Furthermore, by changing the amount and direction of rotation of the operating lever 88, the operating wire 68 can be moved forward and backward to lower and raise the treatment instrument 65. - On the other hand, as described above, the guide shaft 72 is fixedly attached to the base plate 70, and the rotary member 78 as the operating member is positioned in the watertight casing 69. However, between the rotating member 78 as an operating member and the axial position eccentricity absorbing member 81, there is a gap S for absorbing positional errors in the radial direction! Therefore, even if a misalignment occurs between the guide shaft 72 and the rotating member 78, this can be absorbed.

In addition, the elastic banking 85 is located between the opposing part of the eccentric absorbing member 81 between the collar s79 and the eccentric absorbing member 81 (operating member 78).
(which are half a line away from each other in the radial direction), there is no problem. Therefore, since the elastic backing 82 is not subjected to uneven compression or unnecessarily strong compression, its sealing performance and durability can be ensured.

Further, the rotating member 78 and, in turn, the operating lever 80 can be turned by light operation. Further, even if the watertight casing 69 and the substrate 70 in this embodiment are fitted together by elastic deformation, which is a simple and inexpensive method, there will be no problem since the assembly errors can be absorbed as described above.

It should be noted that the present invention is not limited to those shown in the above embodiments, and can be applied to various other cases. In addition to the above-mentioned functions, the present invention can also be applied to a four-section mechanism of an endoscope eyepiece, a film winding mechanism, etc.

As explained above, according to the present invention, no eccentric force is applied to the elastic backing that is coaxially attached to the operating body that penetrates the watertight casing, and no unevenness occurs. Prevents it from becoming heavy and allows for light operation. Moreover, the performance of the water bottle does not deteriorate, causing water leakage, and the elastic backing does not break in a short period of time. In addition, since a ring-shaped elastic backing is used that does not limit the rotational operation range of the operating body, a sufficient rotational operation range can be obtained.
Only Nil can further improve the reliability of sealing performance.

[Brief explanation of the drawing]

FIG. 1 is a schematic perspective view of an endoscope showing a first embodiment of the present invention, FIG. 2 is a sectional view of the operating section thereof, and FIG. 3 is a second embodiment of the present invention. A side sectional view of the endoscope, and FIG. 4 is a sectional view of the operating section thereof.・・Axis rotating body, 42・
・Axis position eccentricity absorbing member, 6... Endoscope, 62...
・Treatment instrument lifting operation unit, 69... Suijaku casing, 7
2... East inner shaft, 73... Binion, 18... One rotation member, 82.85... Elastic backing, Sl. S2...l! Between Iiii. Applicant's agent Patent attorney Takehiko Suzue 23-

Claims (1)

[Claims] a base covered by a watertight casing; a guide shaft fixed to the base; an operating member rotatably attached to the guide shaft, penetrating the watertight casing and operating a mechanism installed within the watertight casing; between the ring-shaped axial position eccentricity absorbing member fitted on the outer circumference of the operating member, the axial position eccentricity absorbing member and the watertight casing, and between the axial position eccentricity absorbing member and the operating member. between the ring-shaped watertight elastic backing inserted between the two, the operating member and the axial position eccentricity absorbing member, and between the axial position eccentricity absorbing member and the watertight casing; an axial position eccentricity absorbing gap having a gap in the radial direction of the operating member formed between at least one of the torpedo casings and at least one of the operating members, which faces the operating member and L'L; % violet is provided with a pair of opposing surface portions formed at each n of the valley opposing portions, with an elastic backing for water honey interposed therebetween, and facing each other parallel to each other along the radial direction of the operating member. Body cavity diagnostic device 0