JPH056455B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a treatment instrument insertion section provided at a connection section between a main body operation section and an insertion section of an endoscope.

[Prior Art] A treatment tool such as forceps is used in an endoscope, and in order to insert the treatment tool, a treatment tool insertion section is provided at the connection between the main body operation section and the insertion section. It's getting old.

Therefore, FIG. 2 shows a treatment instrument insertion section according to the prior art.

As is clear from the figure, a connecting portion 3 is interposed between the main body operating portion 1 and the insertion portion 2 into a body cavity or the like. A branch connecting pipe 5 is fixed to the housing 4 of the connecting part 3 with a screw 6, and an insertion part 2 is connected to the branch connecting pipe 5 from its distal end 5a.
A passage 7 for inserting a treatment instrument is formed toward the side connected to the treatment instrument, and a treatment instrument insertion channel 8 is connected to the passage 7. Also, aisle 7
A branch passage 9 is formed that branches toward the main body device section 1 from a midpoint, and a suction passage 10 is connected to the branch passage 9.

A connection part cover 11 is provided on the outside of the housing 4, and the main body cover 12 of the main body operation part 1 is extended to a position where it engages with this connection part cover 11. A cylindrical guide portion 13 is integrally provided on the main body cover 12 at a position on the extension line of the passage 7 of the branch connecting tube 5, and a plug member 15 for inserting a treatment instrument is provided in the guide portion 13. It is designed to be installed in a removable manner.

A treatment tool insertion passage 15a for inserting a treatment tool such as forceps is formed inside the plug member 15, and one end of the plug member 15 is provided with a treatment tool insertion passage 15a for inserting a treatment tool such as forceps. A check valve 16 is provided to prevent water from flowing backward. Further, a large diameter portion 15b for fitting into the branch connecting pipe 5 is formed on the other end side of the plug member 15, and a seal member 17 is provided within the large diameter portion 15. Furthermore, in the circumferential body of the plug member 15,
A sealing member 17 for sealing between the plug member 15 and the guide portion 13 is interposed.

[Problems to be Solved by the Invention] By the way, as in the prior art described above, the connecting portion 3 is formed of two members, the housing 4 and the connecting portion cover 11, and the branch connecting pipe 5 is further attached to the housing 4. Configuring to attach with screws 6 has drawbacks such as a complicated structure, a large number of parts, troublesome assembly, and increased weight. In addition, when disassembling the main body operation section 1 for repair, inspection, etc., the plug member 15 is attached to the guide section 13.
The main body cover 12 must be removed by pulling it out from the main body cover 12, and when reinstalling it, the shaft plug of the passage 7 of the branch connecting pipe 5 and the guide portion 1 of the main body cover 12 must be removed.
If the axes of 3 are not aligned very accurately, the plug member 15 will not be able to be installed.Moreover, if the plug member 15 is installed while the axes are not aligned as described above, the seal will be damaged. Part 1
There are also problems such as the sealing function of 7 and 18 not being exerted.

The present invention has been made in view of the above points, and an object thereof is to provide a simple structure of the continuous part between the main body operating part and the insertion part, and to make manufacturing and assembly extremely easy. To provide a treatment instrument insertion section of an endoscope that allows easy disassembly and reassembly of the main body operating section, and also allows the interior of the main body operating section to be reliably maintained in an airtight state. be.

[Means for Solving the Problems] In order to achieve the above-mentioned object, the present invention includes a connecting portion interposed between the main body cover of the main body operating portion and the insertion portion, and a housing of the connecting portion. A branch connection part is formed by integral molding with the branch connection part, and the branch connection part has a passage for passing the treatment instrument connected to one end of the treatment instrument insertion channel, one end opens to the passage, and the other end has a suction channel. A branch passageway to which the passageway is connected is formed, and a connecting cylinder part is formed at the other end of the passageway to which a plug member for introducing a treatment instrument equipped with a check valve is removably attached. The main body cover is configured to be movable along the housing of the connecting portion by making the portion not protrude from the housing.

[Function] Considering the ease of assembly, disassembly, and repair of the main body operating section of the endoscope, as is well known, there is a
Since an angle operation mechanism is provided, it is preferable that the main body cover can be inserted and removed from the side connected to the insertion portion. By the way, if the introduction part of the treatment instrument is formed on the main body cover of the main body operation part,
Since the treatment instrument insertion channel is connected to the passage portion of the introduction portion and the suction passage is also connected, the main body cover cannot be inserted or removed.

As in the prior art, the introduction part of the treatment instrument and the part of the passage having the branch part to which the treatment instrument insertion channel and the suction passage are connected are formed separately, and the plug member is removably attached to this introduction part. If the plug member is made to communicate with the passage during installation, the main body cover can be moved toward the insertion section. However, in this case, unless the passage is formed separately from the connecting part and attached to the housing of the connecting part, it will be difficult to adjust the position with the introduction part on the main body cover side. Become.

Therefore, in the present invention, the introduction part of the treatment instrument and the branch connection part that constitutes the passage including the branch part to which the treatment instrument insertion channel and the suction passage are connected are provided on the connecting part side. By this,
Since you can ensure that both positions are aligned,
It becomes possible to form the passage part by integral molding with the housing of the connecting part.

In order to improve the insertability of the treatment instrument in the treatment instrument introducing section, the entrance portion of the treatment instrument must protrude to some extent from the housing of the connecting section. However, if a portion of the connecting portion protrudes outward from the housing, the main body cover will be caught and become immovable. Generally, since a plug member is configured to be removably attached to the introduction part of the treatment instrument, a connecting cylinder part is formed at one end of the passage through which the treatment instrument passes in the branch connection part, and this connecting cylinder part The housing is in a non-protruding state. Here, the connecting cylindrical portion can be formed extremely easily by enlarging the cross-sectional area of the passage.

As described above, by forming the branch connection part provided in the connection part by integrally molding the housing of the connection part, the structure of the connection part is formed only by the housing provided with this branch connection part. In addition, since the housing and the branch connection part are integrated, and the branch connection part is provided with a connecting cylinder part for attaching the plug member, the inside of the main body operation part cannot be seen between them. Since there is no need to provide a sealing member to maintain a confidential state, the structure is simple, the number of parts is reduced, and the operation section of the main body of the endoscope can be easily assembled and disassembled.

In particular, due to the nature of endoscopes, they are cleaned each time they are used, and in order to ensure the completeness of this cleaning, the entire endoscope is immersed in a chemical solution for cleaning. If a sealing member is used as a mechanism to keep the inside of the operation unit airtight and prevent chemical liquid from entering, it is difficult to maintain complete airtightness over a long period of time, and repairs are difficult. , When reassembling the main body operation section after disassembling it for inspection, etc., it is necessary to replace the sealing member, and it is also necessary to check whether this sealing member is functioning properly. Therefore, the security mechanism using the seal member is
This makes disassembly and assembly troublesome.

Therefore, in order to maintain airtightness of the main body operating section, if the number of locations requiring the intervention of a seal member is reduced by at least one location, the disassembly and assembly operations of the main body operating section will become easier. The branch connection must be opened to the outside so that a treatment instrument can be inserted from the outside, but integrally molding the branch connection with the housing of the connection eliminates the need for a sealing member at this location. As a result, ease of disassembling and assembling the main body operating section can be ensured.

Moreover, by connecting the connecting cylinder part to the passage of the disassembly connecting part, there is no need to provide a guide part for the plug member on the main body cover, and there is no part of the housing that protrudes outward. By attaching and detaching the plug member, the main body cover of the main body operating section can be attached and detached by moving it through the connecting section. As a result, repair and inspection of the main body operation section and the like become easy, resulting in excellent maintainability.

[Example] Hereinafter, an example of the present invention will be described in detail based on FIG. 1.

In the figure, 20 indicates a main body operating portion having a main body cover 20a, 21 indicates an insertion portion into the inside of a cavity, etc., and a connecting portion 22 provided between the main body operating portion 20 and the insertion portion 21, Its structure includes a housing 23, into which built-in objects (not shown) such as a light guide and an image guide are inserted, as well as a treatment tool for inserting a treatment tool such as forceps. Insertion channel 2
The proximal end of No. 4 is facing.

In order to guide this treatment instrument insertion channel 24 to the outside of the housing 23, a branch connection pipe 25 constituting a branch connection part is provided inside the housing 23, and the saw branch connection pipe 25 includes:
A connecting cylinder portion 26 having a larger diameter than the branch connecting pipe 25
are installed in succession. A passage 27 is formed inside the branch connecting pipe 25 for passing a treatment instrument that communicates with the connecting cylinder part 26.
A branch passage 27a extending toward the main body operation section 20 side is formed at a midway position of 7. A suction passage 28 for suctioning filth and the like inside the body is connected to the distal end of this branch passage 27a. Here, the housing 23, the connecting cylinder part 26, and the branch connecting pipe 25 mentioned above are formed by integral molding means using lightweight and robust members such as stainless steel, and the connecting cylinder part The distal end of 26 does not protrude from the housing 23 to the outside.

The treatment instrument is connected to the branch connecting pipe 2 in this connecting cylinder part 26.
The treatment instrument insertion channel 24 is passed through the passage 27 of 5.
In order to introduce the treatment tool into the body, a plug member 29 having a treatment tool passage 29a for inserting the treatment tool therein is detachably attached. This plug member 29 allows insertion of a treatment tool from the direction of arrow A in the figure, but prevents dirt in the body cavity from flowing back through the plug member 29 when used for suction, for example. Therefore, a check valve 30 is attached to the tip. Further, a sealing member 31 is interposed between the outer circumferential surface of the plug member 29 and the inner circumferential surface of the connecting cylinder portion 26. Here, the plug member 29 must be stabilized so that it does not come off unnecessarily when attached to the connecting cylinder part 26, but the fitting length of the plug member 29 to the connecting cylinder part 26 must be made as long as possible. In addition, since this fitting portion is fitted almost tightly, there is also resistance due to the bending of the sealing member 31.
Sufficient stability is obtained, and the inconvenience of the plug member 29 rotating or slipping out during operation does not occur.

In the figure, numeral 32 indicates an auxiliary injection device receiving portion, and an injection port body 33 is attached to the auxiliary injection device receiving portion 32. and,
This auxiliary injection receiving portion 32 is also molded integrally with the housing 23.

The present embodiment is constructed as described above, in which the plug member 29 is inserted into the connecting cylinder part 26 provided integrally with the housing 23, and the branch connecting pipe 25 is connected to the connecting cylinder part 26. By connecting the treatment instrument insertion channel 24 to the passageway 26 in and connecting the suction passageway 28 to the branch passageway 27a, a treatment instrument insertion portion can be formed. Here, the connecting cylinder portion 26 and the branch connecting pipe 25
Since it is designed to be integrally molded with the housing 23, there is no need to provide screws to fasten the branch connection pipes as in the case of the conventional connection part, and the housing 23 can be directly connected to the outside. There is no need for an exposed member such as a connection part cover, and there is no need to provide a seal member interposed therebetween or a seal member between the plug member and the guide part that guides the plug member. , the airtightness inside the main body operation section 20 is improved.

Then, with the insertion portion 21 inserted into a body cavity or the like, a treatment tool such as forceps is inserted into the treatment tool passage 29a through the check valve 30 of the plug member 29 from the direction shown by arrow A in FIG. Once inserted, the treatment instrument can be guided along the passage 27 in the branch connecting tube 25 and into the treatment instrument insertion channel 24.

In addition, in order to suction filth, etc. inside the body, a suction valve (not shown) provided in the main body operation section 20 is operated to create a negative pressure state in the suction passage 28, and a branch that communicates with the suction passage 28 is opened. Negative pressure is generated inside the passage 27a, the passage 27, and the treatment instrument insertion channel 24, and suction force can be generated.

After diagnosing or treating a patient using the endoscope as described above, it is necessary to clean and disinfect the entire endoscope. Therefore, in order to immerse the entire endoscope in the cleaning liquid, the inside must be kept airtight.
Since the connecting cylinder part 26 is formed integrally with the housing 23, the insides of the connecting part 22, main body operating part 20, and insertion part 21 are kept completely sealed, and for this reason, the internal contents are not exposed to cleaning liquid. It will be possible to reliably protect yourself from such things. Although cleaning can be performed even with the plug member 29 attached, in order to efficiently clean the inside of the treatment instrument insertion channel 24, the plug member 29 having the check valve 30 is
Even if you remove it and wash it, the connection part 2
2. There is no possibility that cleaning liquid or the like will enter inside the main body operation section 20 and the insertion section 21.

Next, in order to repair or inspect the built-in components of the main body operating section 20, the main body cover 20 of the main body operating section 20 must be
It is necessary to remove a, but this main body cover 20
In order to remove part a, first the plug member 29 is attached and detached from the connecting cylinder part 26, and at the same time, the injection body 33 is removed from the auxiliary injection device receiving part 32. As a result, the outer surface of the housing 23 constituting the connecting portion 22 has no protruding portion. Therefore,
By moving the main body cover 20a in the direction shown by arrow B in FIG. 1, the main body cover 20a can be removed and the inside of the main body operating section 20 can be opened, making repairs and inspections easier. You will be able to do this. After repair and inspection, the main body cover 20a may be moved in the direction opposite to arrow B in the figure. After that, if the plug member 29 is inserted into the connecting cylinder portion 26 provided in the housing 23, the treatment instrument can be inserted, and the passage for inserting the body cover and the treatment instrument as shown in the prior art is created. There is no need for troublesome operations such as alignment of the axes between the seal member 31 and the seal member 31, and the seal member 31 can fully perform its sealing function.

[Effects of the Invention] As explained above, the present invention provides a branch connection part by integral molding means in the housing of the connection part interposed between the main body cover of the main body operation part and the insertion part, and the branch connection part A connecting cylinder part is formed in which a plug member for introducing a treatment instrument is removably attached to the passage in the passageway, and this connecting cylinder part does not protrude from the housing, so that the plug member can be attached to the main body cover side of the main body operation part Compared to a structure in which the branch connection part is formed as a separate member from the housing of the connection part and the two are connected, the number of parts can be reduced, and the manufacturing and assembly of the main body operation part can be made easier. Disassembly, reassembly, etc. are extremely easy, and there is no need to insert a sealing member between the branch connection and the housing.Moreover, a connection in which a plug member is removably attached to the passage of the branch connection is required. Since the cylindrical parts are connected, there is no need to insert a sealing member between the outer circumference of the connecting cylindrical part and the member facing it, and the airtightness of the main body operation part is significantly improved. Moreover, since the branch connection part does not protrude from the housing, when repairing or inspecting the built-in parts of the main body operation part, the main body cover can be attached to the housing by removing the plug member from the connecting tube part. This has various effects, such as being able to move along the main body, opening the interior of the main body operating section, and making repairs, inspections, etc. easier.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram of the configuration of a treatment instrument insertion portion of an endoscope showing an embodiment of the present invention, and FIG. 2 is an explanatory diagram of the configuration of a treatment instrument insertion portion of an endoscope according to the prior art. 20...main unit operation section, 20a...main unit cover,
21... Insertion section, 22... Connection section, 23... Housing, 24... Treatment instrument insertion channel, 25...
... Branch connection pipe, 26 ... Connection cylinder section, 27 ... Passage, 27a ... Branch passage, 28 ... Suction passage, 2
9...Plug member, 29a...Treatment instrument passage, 30...
non-return valve.

Claims (1)

[Claims] 1. A connecting part is interposed between the main body cover of the main body operating part and the insertion part, and the housing of the connecting part has a
A branch connection part is formed by integral molding with it,
The branch connection part is formed with a passage for passing the treatment instrument, one end of which is connected to the treatment instrument insertion channel, and a branch passage, one end of which opens into the passage and the other end of which is connected to the suction passage. A connecting cylinder part is formed at the other end of the passage, to which a plug member for introducing a treatment instrument equipped with a check valve is removably attached, and by making the connecting cylinder part non-protruding from the housing, A treatment instrument insertion section of an endoscope, wherein the main body cover is configured to be movable along the housing of the connecting section.