JPS60210233A - Endoscope - 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 (Technical Field of the Invention) The present invention relates to an endoscope, and particularly relates to an endoscope in which the structure of the end of the forceps channel on the operating section side is improved.

[Technical background of the invention and its problems]

It is known that in an endoscope equipped with a forceps channel, a channel cap is provided in the operation section, and a treatment tool is inserted through the channel cap into a channel tube built in the insertion section.

In this type of endoscope, the channel tube is generally firmly fixed to the channel base using a fixing means such as adhesive so as not to come off. Specifically, conventionally, as shown in FIG. In addition to fitting them together, the two are also fixed using an adhesive. This is commonly employed to ensure watertightness.

Incidentally, there are cases in which an endoscope must be disassembled for repair or the like of the endoscope operating section C. To do this, it is necessary to remove the channel pipe from the channel cap d.

However, the structure in which the channel pipe is directly connected to the channel cap d as described above has the problem that it is extremely difficult to disassemble it, and that once it is disassembled, the channel pipe will be damaged and cannot be regenerated. Both disassembly and assembly were extremely troublesome.

[Purpose of the invention]

This invention has been made in view of the above circumstances, and its purpose is to provide an endoscope that is easy to disassemble and reassemble.

[Summary of the invention]

That is, the present invention provides a channel receiver at the end of the channel tube on the side of the endoscope operating section, and also provides an engaging means for removably engaging the channel receiver with the channel cap, thereby making it easy to connect the channel. The purpose is to enable the pipe and channel cap to be removed and connected.

[Embodiments of the invention]

The present invention will be explained below based on an embodiment shown in FIGS. 3 to 5. Fig. 3 shows the structure around the forceps channel of a small-diameter endoscope 1, in which 1 is an endoscope operating section,
2 is an endoscope insertion section.

Here, to explain the endoscope operation unit 1, 3 has a plurality of rod-shaped members 5 erected at the end of the head side of the cylindrical support 4, and the end of these rod-shaped members 5. This is a frame portion configured by connecting the closed-side cover 6 to the closed-side cover 6. and,
A circumferential cover 7 is slidably disposed around the rod-shaped members 5 to close the circumference of the rod-shaped members 5 together with the closing-side cover 6. The lower end of the circumferential cover 7 is supported so as to be slidable downward by a detachable ring 5a screwed onto the outer circumference of the head side of the cylindrical column 4. 6 and the peripheral cover 7, an equipment storage chamber 8 is formed which can be freely exposed to the outside by sliding the peripheral cover 7. Although not shown, various types of equipment necessary for operating the endoscope are housed inside this equipment storage chamber 8. Further, on the outer peripheral surface of the cylindrical support 4, a cylindrical cover 1 is provided at the upper end.
A branch main body 9 formed into a substantially Y-shape with continuous numbers 0 is slidably fitted on the outside, and an eye branching to the side of the branch main body 9 constitutes a channel entrance portion 12. .

A channel mouthpiece 13 is provided at the channel entrance section 12 of the endoscope operation section 1.

Note that the channel cap 13 will be described later.

The lower end of the branch main body 9 is fixed to the cylindrical support 4 by a fixing screw 15 screwed inward from the outer circumference of the step 14, using a step 14 formed on its outer periphery as a support. , by removing the fixing screw 15, the branch body 9
can be slid together with the cover 10 toward the bottom of the cylindrical support 4. In addition, 1
6 is an O-ring that seals between the upper end of the cover 10 and the detachable ring 5a, and 17 is an O-ring that seals the connection between the branch main body 9 and the cover 10.

On the other hand, the structure of the endoscope insertion section 2 includes a channel tube 1
A bend preventing member 21 made of rubber and having a bend preventing fixing nut 20 connected to the tip thereof is slidably mounted on the outer peripheral surface of a flexible insertion tube body 19 having a built-in tube. The insertion tube body 19 of the endoscope insertion section 2 has its distal end inserted into the distal end portion of the cylindrical column 4 that protrudes from the branch body 9, and also extends from the outer peripheral side of the insertion tube body 19. It is fixed to the cylindrical support 4 with 22. The tip of the anti-bending fixing nut 20 is fitted onto the stepped portion 14 of the cylindrical support 4, and the threaded portion of the anti-bending fixing nut 20 is inserted into the threaded portion 23 carved on the outer peripheral surface of the cylindrical support 4. The insertion tube 19 and the bending prevention member 21 are fixed to attach the entire endoscope insertion section 2 to the endoscope operation section 1. Note that 24 is an O-ring provided on the upstream side of the fixing screw 15 to effectively seal between the anti-bending fixing nut 20 and the branch main body 9, and is also provided opposite to the channel entrance portion 12 of the cylindrical support 4. Of course, the part is open. Further, the end of the channel tube 18 built in the insertion tube body 19 on the operating section side is removably connected to the channel base 13 of the endoscope operating section 1 via the channel receiving section 25 provided at the end. engaged. FIG. 5 shows the engagement structure which is the main part of this invention. Here, referring to FIG. 5, 13 is the above-mentioned channel base, 18 is a channel tube, and 25 is a channel receiving part. Channel cap 13
As shown in FIG. 4, a stepped portion 27 is formed at the tip of the cap body 26 formed into a substantially cylindrical shape, and a plurality of bottles 28 are protruded on the outer peripheral surface of the rear step of the stepped portion 27. Further, a threaded portion 29 for attaching a stopper is provided on the outer circumferential surface of the rear stage of the bottle 28 . . . to form the tip end side. Further, a recess 30 for mounting a receiving part is provided at the rear end of the base body 26,
Further, a flange portion 31 is formed on the outer circumferential surface of the center portion of the base body 26, and a fixing ring 32 is formed with a threaded portion on the outer circumferential surface using the flange portion 31 as a stopper.
are detachably arranged on the base body 26 to constitute the whole.

This channel cap 13 is connected to the branch main body 9.
After inserting the fixing ring 32 into the channel entrance part 12 until its rear side contacts the positioning seat 33 provided on the inner surface of the channel entrance part 12, screw the fixing ring 32 toward the threaded part provided on the inner surface of the channel entrance part 12. and fixing ring 32.
It is attached by sandwiching the flange portion 31 between the two. On the other hand, the channel receiving part 25 includes a fitting part 3 which can be fitted into the four parts 30 of the channel cap 13 at the rear part.
A recess 37 is formed along the circumferential direction on the central outer circumferential surface of the substantially cylindrical receiving body 36 with a conical tip.
, and a stepped portion 38 protruding outward is connected to the rear end of the recessed portion 37 . The channel receiving portion 25 is attached to the channel pipe 18 so as not to come off. That is,
The end of the channel pipe 18 is inserted into the recess 37 and the stepped part 38 of the channel receiving part 25, and the outer peripheral portion of the channel pipe 18 disposed in the recess 37 is wound with the thread 39, and then the wound thread is By fixing the parts with the adhesive 40, they are securely fixed. In addition, since the end of the channel pipe 18 is raised by the stepped portion 38, the wound thread 39 is properly fixed without being biased. The channel receiving portion 25 configured in this manner is detachably attached to the channel cap 13 using a fixing screw 43 having a sharp tip. That is, a sloped surface 41 is formed on the back surface of the fitting portion 35 and tapers downward toward the distal end of the channel receiving portion 25, while a surface 41 that is fitted into the recess 37 is formed on the opening side of the peripheral wall of the recess 37. Inclined surface 41 when insertion part 35 is inserted
A plurality of screw holes 42 are drilled corresponding to the positions of the holes 42, and after inserting the insertion part 35 into the recess 30, the fixing screws 43 are inserted from each screw hole 42 at an angle. By screwing in toward the surface 41, the channel receiving portion 25 is inserted into the recess 30 by the collision between the inclined surface of the tip portion 43a of the fixing screw 43 and the inclined surface 41 of the insertion portion 35. The channel receiving portion 25 is fixed to the channel cap 13 by pressing toward the bottom side. However, fixing screw 4
Channel receiving part 25 is locked by insertion and removal of 3...
And the channel cap 13 is designed so that it can be removed from the W,
Channel pipes 18 and channel receivers 25 that are connected to each other
, the channel base 13 constitutes a forceps channel.

On the other hand, a forceps plug part 45 is removably provided at the tip of the channel mouthpiece 13. As shown in FIG. 4, this is a plug body 4 in which an eye 46 for liquid injection is connected in a T-shape.
7, an outer plug part 48 made of silicone rubber, for example, with a slit 47a formed in the center, and a small hole 4 in the center.
A forceps insertion section 51 is constructed by overlapping an inner plug section 50 made of silicone rubber having the same shape as 9, and a connecting tube section 53 having a fixing ring 52 rotatably mounted on the lower part thereof.
The connecting portion 54 is configured by connecting the two. Further, a threaded portion 55 is provided on the tip side of the inner surface of the fixing ring 52.

Furthermore, the opening edge of the connecting pipe section 53 disposed at a position retracted from the threaded section 55 is capable of fitting with the pins 28 of the channel cap 13 in correspondence with the pins 28... Notches 56 are provided, and a ring gasket 57 having a trapezoidal cross section is provided on the inner surface of the connecting pipe portion 53 where the step portion 27 of the channel cap 13 is disposed, and the ring packing 57 has a trapezoidal cross section. When screwing into the threaded part 29 of the channel cap 13 and fixing it, fixing ring 5
2 into the channel cap 13 in an incomplete state, first screw the bottle 28... and the notch 56 into the channel cap 13.
The fixing ring 52 cannot be screwed into the channel cap 13 unless the channel cap 13 and the connecting tube portion 53 are fitted together during the mating period, and the fixing ring 52 cannot be screwed into the channel cap 13 or the connecting tube portion 53 cannot be screwed in. Channel cap 1
The stepped portion 27 of No. 3 gradually rides on the trapezoidal ring packing 57, and the pressure of the ring packing 57 seals the area around the channel cap 13 to prevent dust from entering. Of course, there is also the advantage that the resistance is small at the initial stage of fitting, and the resistance gradually increases, making it easier to fit. For this purpose, it goes without saying that the thickness y of the ring packing 57 must be longer than the length X of the stepped portion 27.

Note that 58 is an O-ring provided on the channel receiving portion 25 for sealing between the channel receiving portion 25 and the channel cap 13.

Therefore, when disassembling the endoscope configured in this manner for repairing the endoscope operating section 1, first, the fixing ring 52 is rotated to fix the channel cap 13 and the channel entrance section 12. unlock. Next, the break-stop member 21 is rotated to release the fixation between the break-stop fixing nut 20 and the cylindrical column 4, and then the break-stop member 21 is lowered in a direction away from the endoscope operating section 1, that is, downward. . As a result, the anti-bending fixing nut 20 comes off from the branch body 9, and the head of the fixing screw 15 that fixes the branch body 9 and the cylindrical support 4 is exposed. Then,
The fixing screw 15 is removed and the entire branch main body 9 is pushed down toward the space formed below.

As a result, the branch main body 9 and the cover 10 slide using the cylindrical support 4 as a guide and move away from the equipment storage chamber 8 located above, and the channel cap 13 gradually protrudes from the channel entrance 12 as it slides. The channel receiving part 25 and the end of the channel pipe 18 protrude from the channel entrance part 12 to the outside.

Then, from the state where this fixing screw 43 is exposed to the outside,
When the fixing screw 43 is loosened to release the engagement between the channel base 13 and the channel receiving part 25 and the channel base 13 is removed from the channel receiving part 25, the channel base 13 is removed from the endoscope. After that, the branch body 9 and the cover 10 are lowered again, and the detachable ring 5a is loosened, and the detachable ring 5a is inserted into the cylindrical column through the opening provided in the branch cylindrical column 4. If you remove the circumferential cover 6 from the column 4 and lower it downward using the cylindrical column 4 as a guide into the area where the cover 10 used to be, the equipment storage chamber 8 containing the equipment necessary for operating the endoscope will be installed in each bar-shaped area. The endoscope operating section 1 will be exposed to the outside through the material 5. However, the endoscope operating section 1 can be repaired from the opened equipment storage chamber 8. The endoscope can be rebuilt by reassembling it to its original condition, which is the reverse of disassembly.

In this way, using the channel receiving part 25, the channel pipe 1
8 and the channel base 13 are made detachable, so that the endoscope can be easily disassembled and reassembled.

Moreover, by making the branch body 9 slidable with respect to the cylindrical support 4, the space in which the branch body 9 is arranged can also be used for moving the circumferential cover 7. The equipment housing chamber 8 can be opened while keeping the distance between the branch main body 9 and the equipment housing chamber 8 short, and the distance between the branch main body 9 and the equipment housing chamber 8 can be shortened and the endoscope operating section It also has the advantage of being able to reduce the size of the device.

Furthermore, after completing the assembly of the endoscope, it is important to check whether the position of the endoscope insertion section 2 in the rotational direction is properly adjusted. Fixing nut 2 to prevent the head of the insertion part fixing screw 22 from bending
By arranging the endoscope insertion section 2 so that it is exposed to the outside when removed, the rotational direction of the endoscope insertion section 2 can be easily adjusted without removing the branch section main body 9, further simplifying assembly. It can be done easily.

〔Effect of the invention〕

As explained above, according to the present invention, the channel pipe and the channel cap can be attached and detached, and the endoscope can be disassembled and reassembled very easily.

[Brief explanation of drawings]

FIG. 1 is a sectional view showing a conventional endoscope, FIG. 2 is a sectional view showing the endoscope in an exploded state, FIGS. 3 to 5 show an embodiment of the present invention, and FIG. The figure is a cross-sectional view of an endoscope.
FIG. 4 is a sectional view showing the structure of the forceps plug, and FIG. 5 is a sectional view showing the connection between the channel tube and the channel mouthpiece. 1... Endoscope operation unit, 13... Channel cap, 1
8゛...Channel tube, 25...Channel receiver,
30゜41.43...concavity, inclined surface, tip fixing screw (
engagement means). Applicant's representative Patent attorney Jun Tsuboi Figure 3 Figure 5 Showa era 9. Q-7s Mr. Manabu Shiga, Commissioner of the Japan Patent Office, Patent Application No. 59-68180 No. 2, Indication of the Case, Title of the Invention 3, Person making the amendment Relationship with the case Patent Applicant Name (037) Olympus Optical Engineering Nai Co., Ltd. 4, Agent 5, Voluntary amendment 7, Contents of the amendment (11 Add "and Fig. 2" after "Fig. 1" on the 5th line of page 2 of the specification. (2) Details "Fixing ring 52" on page 11, line 19 of the book is corrected to "fixing ring 3.?J." (3) In the drawings, Figures 3 and 4 are corrected as shown in the attached sheet. 4 figure ζ1

Claims (1)

[Claims] In an endoscope having a forceps channel, a channel cap provided on an endoscope operating section, a channel tube connected to the channel cap, and a channel receiver provided at an end of the channel tube on the operating section side. . An endoscope comprising an engaging means for removably engaging the channel receiving portion and the channel cap.