JPS6329539B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an endoscope in which a channel tube provided over the entire length of the insertion portion serves as both a suction path and a treatment instrument insertion path.

Generally, some endoscopes are equipped with a suction tube that suctions and removes mucus, air, etc. from a body cavity, and a treatment instrument insertion port for introducing a treatment instrument such as forceps into the body cavity. In such an endoscope, the suction tube and the treatment instrument insertion port body are communicated with a channel tube provided over the entire length of the insertion section, and this channel tube is used as a suction path and a treatment instrument insertion path. I try to use it for both purposes.

That is, conventionally, a three-pronged tube is used to communicate the suction tube and the treatment instrument insertion port body with a channel tube from the insertion section, and the channel tube is connected to one opening of the three-pronged tube in the operation section. The treatment instrument insertion port body is connected to one of the remaining two openings through a suction tube and the other through a connection tube. however,
According to such a configuration, the space inside the operating section is narrow, and the length of the treatment instrument insertion port provided penetrating the peripheral wall of the operating section protrudes into the operating section is limited by the thickness of the operating section. Therefore, there is a problem in that it is extremely difficult to connect the treatment instrument insertion port body and the three-pronged tube through the connecting tube, and this makes it difficult to assemble the operating section or during repairs. This made disassembly work difficult. Furthermore, since a connecting tube must be used to connect the treatment instrument insertion port body and the three-pronged tube, the number of parts increases, which increases costs and increases the number of connection points, which complicates assembly and disassembly work. There was also a drawback.

This invention was made based on the above-mentioned circumstances, and its purpose is to connect a treatment instrument insertion port body to a channel tube by simply inserting it into a mounting hole formed in an operating section without using a connection tube. To provide an endoscope whose operation part can be easily assembled and disassembled.

An embodiment of the present invention will be described below with reference to the drawings. Reference numeral 1 in FIG. 1 denotes an endoscope, and the endoscope 1 consists of an operating section 3 to which a universal cord 2 having a connector 2a at its end is connected, and an insertion section 4 connected to the operating section 3. The operation section 3 includes an eyepiece section 5, an air/water supply switching valve 6, a suction switching valve 7, and a lower end of a grip section 8 formed on the operation section 3, that is, a treatment instrument is inserted at the end connected to the insertion section 4. A mouth 9 is provided. A channel tube 10 is inserted into the insertion portion 4 over its entire length. This channel tube 10 is connected to the insertion port 9 via a connecting member 11 (described later) at the lower end of the operating section 3.
It also communicates with one end of a suction tube 12 having a suction switching valve 7 interposed therebetween. The other end of the suction tube 12 is inserted into the universal cord 2, and its end communicates with a base 13 provided on the connector 2a of the universal cord 2.

As shown in FIG. 2, the operating section 3 has a cylindrical shape having an operating section main body 14 and an upper end that is liquid-tightly fitted to the lower end outer peripheral surface of the operating section main body 14 via a first packing 15. The grip cover 16 and the lower end provided inside the grip cover 16 are connected to the operation unit main body 1.
4 and a frame 19 fitted into an annular portion 17 extending from the lower end of the frame 19 and fixed with screws 18.
The lower end of the frame 19 is formed into a cylindrical portion 20, and the outer circumferential surface of the cylindrical portion 20 is liquid-tightly joined to the inner circumferential surface of the lower end of the grip cover 16 via a second packing 21. Although not shown, a large opening for working is provided in the peripheral wall of the frame 19.

On the other hand, the lower end portion of the gripping portion 8 is configured as shown in FIG. 3. That is, the first retaining ring 22 is screwed onto the outer peripheral surface of the lower end of the frame 19.
Thereby, the grip cover 16 is integrally connected to the operating section main body 14. Further, a connection base 24 is fitted to the lower end of the frame 19 via a third packing 23, and this connection base 24 has a substantially L-shaped cross section and is screwed onto the outer peripheral surface of the lower end of the frame 19. It is held and fixed by a second retaining ring 25. A flexible tube 26 forming the insertion portion 4 is connected and fixed to this connection base 24 . Furthermore, the flexible tube 26 is provided at the lower end of the frame 19.
A bend preventing member 27 for preventing the connecting portion with the connecting cap 24 from being bent significantly is provided by screwing a connecting fitting 28 attached to the inner peripheral surface of the bending member 27.

Further, the above-mentioned connecting member 1 is provided on the inner surface of the frame 19.
1 is fixed by a screw 29. This connecting member 11 consists of a base 31 having a branch passage 30, and a tube 33 which is integrally attached to the base 31 and communicates the middle part of the internal passage 32 with the branch passage 30. That is, the connecting member 11 has a three-pronged passage formed by the branch passage 30 and the internal passage 32. And this connecting member 11
In this case, the opening of the branch passage 30 is connected to the grip cover 16.
It is attached to the frame 19 so as to face an attachment hole 34 formed in a branch portion 16a provided in the lower end peripheral wall of the frame 19. Note that a through hole 19a is bored in the frame 19 at a location facing the branch passage 30,
Further, the opening end of the branch passage 30, that is, the mouth portion 30a is located inside the inner circumferential surface of the grip cover 16. Therefore, the gripping cover 16 is attached to the frame 19
By removing the anti-bending member 27 and the first retaining ring 22 screwed onto the lower end of the frame 19, the retainer can be removed from the frame 19.

The channel tube 10 inserted through the insertion portion 4 is fluid-tightly connected to one opening located below the tube body 33 of the connecting member 11. In this connection structure, the end tube 3 is connected to the end of the tube body 33.
5 is fitted at one end, and the channel tube 10 is attached to the other tapered end. A locking nut 36a is screwed onto the connecting end pipe 35 via a retaining ring 36.
The channel tube 10 is fixed to the connecting end tube 35 by this retaining ring 36. Further, the suction tube 12 is liquid-tightly connected to the other opening located above the tube body 33 of the connecting member 11 with a connection structure similar to that of the channel tube 10. Further, at the open end of the branch passage 30 formed in the base 31 of the connecting member 11, a treatment instrument insertion port body 37 forming the insertion port 9 inserted through the attachment hole 34 formed in the grip cover 16 is provided. Liquid-tight connection. That is, the treatment instrument insertion port body 37 has a cylindrical shape, and a fourth packing 38 is provided on the inner circumferential surface of one end, and a fifth packing 39 is provided on the outer circumferential surface of the other end. Further, a short tubular plug 41 is liquid-tightly screwed into the other end via a sixth packing 40. This plug body 4
1 is provided with two elastic bodies 43, 43 held between a pair of retaining rings 42, 42, and these are connected to a hollow nut 44 screwed into the other end of the plug body 41.
It is held in place and fixed. Note that the two elastic bodies 43, 43 have slits 45, 4 in the orthogonal direction.
5 are formed, and these slits 45, 45 are pushed open and a treatment tool such as forceps (not shown) is inserted.
The treatment instrument insertion port body 37 configured in this manner is inserted into the mounting hole 34 to open the opening 3 of the branch passage 30 with the opening facing the mounting hole 34.
One end portion is liquid-tightly fitted to Oa via the fourth packing 38. The treatment instrument insertion port body 37 inserted into the attachment hole 34 is attached to the branch portion 1 of the grip cover 16.
It is fixed by a lock pin 46 passed through 6a so as not to move in the insertion/removal direction and rotational direction.

Next, a procedure for assembling the endoscope 1 having the above configuration will be explained. First, attach the frame 19 to the operating unit main body 1.
Connect and fix to 4. On the other hand, channel tube 1
In the insertion section 4 into which a built-in object such as 0 is inserted,
Connection cap 2 connected to flexible tube 26 of insertion section 4
The channel tube 10 protruding from 4 is cut to a predetermined length. Then, this channel tube 10 is connected to the lower opening of the tube body 33 attached to the connecting member 11 so that the branch passage 30 faces in a predetermined direction. Next, channel tube 10
The connecting member 11 connected to the frame 19 is inserted through the lower end opening of the frame 19, and the connecting base 24 connected to the flexible tube 26 of the insertion portion 4 is fixed to the lower end of the frame 19 with a second retaining ring 25. frame 19
The connecting member 11 is attached and fixed at a predetermined position on the inner surface of the housing. Next, the suction tube 12 is connected to the upper opening of the tube body 33 of the connecting member 11. The suction tube 12 and channel tube 10 are connected by hand through a large opening (not shown) formed in the peripheral wall of the frame 19.

Once the suction tube 12 and channel tube 10 are connected to the tube body 33 in this way, the grip cover 16 is inserted and slid from the insertion section 4, its upper end is fitted into the operation section main body 14, and the lower end is The frame 19 is connected and fixed to the operating section main body 14 by pressing with a first retaining ring 22 screwed onto the lower end of the frame 19. At this time, the attachment hole 34 bored in the branch portion 16a of the grip cover 16 is made to face the opening of the branch passage 30 of the connecting member 11. Similarly, the anti-bending member 27 is inserted and slid from the insertion portion 4, and the connecting fitting 28 provided on the inner peripheral surface thereof is screwed onto the lower end of the frame 19. Next, the treatment instrument insertion port body 37 is inserted through the mounting hole 34, and one end thereof is fitted into the opening 30a of the branch passage 30, and then this is secured to the branch portion 1 by the lock pin 46.
It is sufficient to fix it to 6a.

That is, according to the above configuration, the connection between the treatment instrument insertion port body 37 and the branch passage 30 of the connecting member 11 is made as follows.
Since this can be done by inserting the treatment instrument insertion opening body 37 into the attachment hole 34 formed in the branch portion 16a of the grip cover 16, the connection operation is easy. Moreover, since disassembly can be carried out in the reverse order of the assembly procedure, the treatment instrument insertion port body 37, channel tube 10, and suction tube 12 connected to the connecting member 11 can be easily removed.

Note that this invention is not limited to the above embodiment,
For example, the suction switching valve 7 may be provided in the grip cover 16 instead of the operating section main body 14, and the suction tube 12 may be led out from the operating section 3 externally, for example, from the mounting hole 34, without using the suction switching valve 7. It may be connected to an electromagnetic valve or the like, and suction may be performed by operating the electromagnetic valve.

As described above, the present invention provides a connecting member having a plurality of branched passages in an operating section, fixedly provided such that one opening of the passage faces a mounting hole formed in a cover of the operating section, A treatment insertion port body to be inserted into the attachment hole is fitted into this opening, and a channel tube is connected to the other opening of the passage. Therefore, the treatment instrument insertion port body and the channel tube can be connected by simply inserting the treatment instrument insertion port body into the mounting hole and fitting it into one opening of the passage formed in the connecting member. Moreover, since it can be disassembled simply by pulling it out from the mounting hole, these assembly and disassembly operations can be performed easily and quickly. Further, since a connecting tube is not required as in the conventional case, not only the number of parts can be reduced, but also the number of connection points can be reduced, which also facilitates assembly and disassembly work.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention; FIG. 1 is a configuration diagram of the entire endoscope, FIG. 2 is a partially sectional side view of the operating section, and FIG. 3 is an enlarged sectional view of the lower end of the operating section. It is. 3... Operation section, 4... Insertion section, 10... Channel tube, 11... Connection member, 16... Gripping cover, 30... Branch passage (passage), 32... Internal passage (passage), 34... ...Mounting hole, 37...Treatment instrument insertion port body.

Claims (1)

[Claims] 1. In an endoscope in which a channel tube that is inserted over the entire length of the insertion section is connected to a treatment instrument insertion port that is inserted into a mounting hole formed in a cover of the operation section within the operation section, the above operation is performed. A connecting member having a plurality of branched passages in the part is fixedly provided so that one opening of the passage faces the mounting hole, and a treatment instrument insertion port body to be inserted into the mounting hole is inserted into the opening. An endoscope characterized in that the channel tube is connected to the other opening of the passage while being fitted together.