JPH04161136A - Inserting part of endoscope - Google Patents

Abstract

PURPOSE:To moderately insert the treating implement through a treating implement insert- through line, and also, to sufficiently wash the treating implement insert-through line by attaching a hood to a main body provided with an observing system and an illuminating system so as to be attachable and detachable, forming a space between the main body and the hood and using it as the treating implement insert-through line. CONSTITUTION:An inserting part of an endoscope 10 is provided with a main body 20 provided with an observing system 11 and an illuminating system 12, and a hood 50 attached to this main body 20, and between the main body 20 and the hood 50, a space is formed, and this space becomes a treating implement insert-through line 13. Also, a curved part B2 of the hood 50 is formed so that it can abut and separate against a curved part of the main body 20, and the part B3 positioned in a base part side of the curved part B2 in the hood 50 is engaged to the part positioned in a base part side of the curved part in the main body 20 so as to be movable in its longitudinal direction by a hook claw. In such a state, before attaching the hood 50 to the main body 20, a treating implement is placed in advance so as to go along the outside surface of the main body 20 or the inside surface of the hood 50, and thereafter, the hood is attached to the main body. In such a way, the treating implement which is not bent easily is allowed to pass through the treating implement insert-through line without any hindrance, and by separating it, washing is executed enough.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an insertion section of an endoscope used for observing the larynx and the like.

[Prior Art] Conventionally, when observing the larynx, a rigid endoscope with a straight insertion section has been used. In the case of this endoscope, the patient receiving the endoscope had to face up and keep their larynx straight to make it easier for the endoscope to be inserted. .

However, it is not desirable to force patients into such a posture because it arouses fear. In addition, some patients are unable to straighten their larynx even if they take the above posture, and it is extremely difficult to insert the endoscope into such patients.

Therefore, recently, a rigid endoscope 1 as shown in FIG. 23 has been developed. In this endoscope 1, the distal end of the insertion section 3 extending from the operating section 2 is bent at a predetermined angle in advance. Therefore, in the case of this endoscope 1, the insertion section 3 can be easily inserted into the larynx by having the patient take a slightly upward posture, which is very convenient.
Another advantage is that it can be easily inserted into patients who cannot straighten their larynx.

By the way, as shown in FIG. 24, the insertion section 3 of the endoscope 1 has an observation system 4 consisting of a lens group, etc. inside it, as shown in FIG.
It is equipped with an illumination system 5.5 made of an optical fiber bundle and a treatment instrument insertion passage 6. The treatment instrument insertion passage 6 is a passage for inserting a treatment instrument such as forceps, and the treatment instrument 7 such as forceps is inserted into the treatment instrument push passage 6 from the insertion port 8 provided in the operating section 2, and on the way, It passes through the bent portion and is projected outward from an opening provided on the distal end surface of the insertion portion 3.

[Problems to be Solved by the Invention] By the way, the treatment instrument 7 has an action part 7 depending on the treatment purpose.
There are some cases in which it is necessary to make the vicinity 7b of a relatively hard. That is, unless the vicinity 7b of the acting part 7a is hardened,
This is a case in which the action portion 7a cannot be strongly abutted against the affected area, making it impossible to perform the desired treatment.

In the case of the conventional endoscope 1, the hard part 7b of the treatment instrument 7
If the dimension is long, there is a problem that the hard portion 7b cannot bend through the bend of the treatment instrument insertion passage 6, and the working portion 7a cannot be pushed out.

In addition, generally, after using the endoscope 1, the treatment instrument insertion passage 6 is closed.
However, since the treatment instrument insertion passage 6 has a very thin tubular shape, it is difficult to thoroughly clean it.

This invention was made in view of the problems of the prior art described above, and its purpose is to allow a treatment instrument to be inserted into the treatment instrument insertion passage without difficulty, and to make the treatment instrument insertion passage sufficiently open. The present invention aims to provide an endoscope insertion section that can be easily cleaned.

[Means for solving the problem] This invention was made to achieve the above object,
The gist of this can be found in the insertion sections of the two endoscopes below.

(1) Equipped with an observation system, an illumination system, and a treatment instrument insertion passage,
An insertion section of an endoscope having an unbendable hard curved section at its distal end includes a main body including the above-mentioned observation system and illumination system, and a hood detachably attached to the main body. An insertion section of an endoscope, characterized in that a space is formed between the hood and the hood, and the space is used as a passage for inserting the treatment instrument.

(2) Equipped with an observation system, an illumination system, and a treatment instrument push path,
An insertion section of an endoscope having an unbendable hard curved section at the distal end includes a main body including the observation system and the illumination system, and a hood attached to the main body, and the main body and the hood are connected to each other. A space is formed in between, and this space is used as the treatment instrument insertion passage, and the curved part of the hood can come into contact with and separate from the curved part of the main body, and the curved part of the hood An insertion portion of an endoscope, wherein a portion of the main body located closer to the base than the curved portion engages with a portion of the main body located closer to the base than the curved portion so as to be movable in the longitudinal direction.

[Function] In the case of the first invention, before attaching the hood to the main body, the treatment instrument is attached to the outer surface of the main body or the inner surface of the hood, which constitutes a part of the wall surface of the treatment instrument insertion passage. position, and then attach the hood to the main body. In this way, even a treatment instrument that is difficult to bend can be passed through the treatment instrument insertion passage without any hindrance. Further, after using the endoscope, if the hood is removed and separated from the main body, the wall surface of the treatment instrument insertion passage can be exposed, so that it can be thoroughly cleaned.

In the case of the second invention, before inserting the treatment instrument into the treatment instrument insertion passage, the hood and the main body are moved relative to each other to separate the curved portion of the hood from the curved portion of the main body. by this,
The treatment instrument insertion path in the curved portion is widened, and even a treatment instrument that is difficult to bend can be easily bent through the curved portion. After the treatment instrument is inserted, the main body and the hood are moved relative to each other so that the curved portion of the main body and the curved portion of the hood are brought into contact with each other.

[Examples] Examples of the first invention and the second invention of this application will be described below based on the drawings from FIG. 1 to FIG. 22.

1 is a partial vertical sectional view of the endoscope 10, FIG. 2 is a plan view thereof, FIG. 3 is a sectional view taken along the arrow 1 in FIG. 1, and FIG. 4 is a sectional view taken along the arrow 1 in FIG. 1. The endoscope IO is composed of an operating section A and an insertion section B. Furthermore, the insertion part B is composed of a straight part B1 that extends straight from the tip of the operating part A, and a curved part B that is connected to the front end of the straight part B1, curves downward, and then extends slightly straight. ing. That is, in this example,
Straight part B, but curved part B! It corresponds to the part located on the base side of. The insertion portion B is rigid and cannot be bent. The endoscope 10 includes an observation system 11 including a lens group 11a, a prism group 11b, etc., an illumination system 12 including an optical fiber, and a forceps channel 13 through which forceps are inserted.

The endoscope 10 is composed of a main body 20 and a hood 50 that is detachably attached to the main body 20 and movably along the longitudinal direction of the straight portion B of the insertion section B. ing. The main body 20 constitutes the rear half of the operating section A, the lower side of the front half of the operating section A, and the lower side of the insertion section B that is connected thereto. On the other hand, food 50 is
It constitutes the upper side of the front half of the operation part A and the upper side of the insertion part B which is connected thereto.

First, the main body 20 will be explained.

5 and 6 show a frame 22 that constitutes the lower front half of the main body 20 toward the operation section and the lower side of the insertion section B, and FIG. 5 is a plan view, and FIG. 6 is a plan view. is a front view. Moreover, FIGS. 7 to 11 are respectively an enlarged cross-sectional view in the direction of the arrows, ■ an enlarged cross-sectional view in the direction of the arrows, ■ an enlarged cross-sectional view in the direction of the arrows, ■ an enlarged cross-sectional view in the direction of the arrows, and ■ an enlarged cross-sectional view in the direction of the arrows in FIG. 6, respectively. Yes, first
FIG. 2 is an enlarged end view in the direction of the arrow ■ in FIG. 6. As shown in these drawings, the frame 22 includes a base 23, a core material 24, a cover 25, and a tip component 26.

The base 23 constitutes the lower front half of the operating section A, and a handle 21 is fixed to the lower part of the base 23, as shown in FIG. The operator holds this handle 21 and uses the endoscope 1.
Manipulate 0.

The cover 25 has a substantially semi-cylindrical shape, and has a straight portion B1 of the insertion portion B.
It is located only in A core material 24 is fixed inside the cover 25.

The core material 24 covers the entire straight portion B of the insertion portion B and the curved portion B.
, is located on the base side of the. The base ends of the core member 24 and the cover 25 are inserted and fixed into the base 23 as shown in FIG. 7. The upper end surface of the core material 24 is a substantially flat surface over its entire length. However, as shown in FIGS. 7 and 8, a protrusion 24a that protrudes slightly upward is provided at the lateral upper end of the portion of the core material 24 located on the base side of the straight portion B. The protrusion 24a protrudes slightly above the edge of the cover 25, and the outer surface of the protrusion 24a is formed into an arcuate surface having an outer diameter that is approximately the same as the inner diameter of the inner peripheral surface of the cover 25. In addition, as shown in FIG. 9, the core material 24
At the upper end of the portion located at the tip of the straight portion B1, a hooking pawl 24b having an inverted cross section is formed on both sides thereof.

Each latch claw 24b projects upward from the edge of the cover 25 and faces outward. Furthermore, as shown in FIGS. 7 and 9, a support portion 24C is formed in the core member 24 at the proximal end and the distal end of the straight portion B, and extends downward from the center thereof. A through hole 24d is provided in each support portion 24C. Further, as shown in FIGS. 10 and 11, a pair of leg portions 24e are formed in a portion of the core member 24 located at the curved portion B, and extend downward in parallel to each other.

The tip component 26 has a substantially semicircular cross section, and has an observation system insertion hole 26a and two illumination system insertion holes 26b inside. The proximal end of the distal end forming portion 26 is connected and fixed to the distal end portion of the core member 24 . The upper end surface of the tip component 26 is also made into a flat surface, and continues flush with the upper end surface of the core material 24. Two engaging recesses 26c are formed in the middle of the upper edge of the outer circumferential surface of the tip forming portion 26. Furthermore, as shown in Figure 1,
A tip cover member 32 is fixed to the tip of the tip forming portion 26. The tip cover member 32 is inserted into the observation system insertion hole 2.
It has a pattern observation window 32a connected to 6H and two illumination windows (not shown) connected to the illumination system insertion hole 26b.

The rear end of the base 23 is a flange portion 23a having a circular cross section as shown in FIG. A notch 23b is formed in the upper part of the flange portion 23a, through which an arm 51C of a hood 50 (described later) is inserted.
The upper opening b is closed by a band 34 screwed and fixed to the upper outer peripheral surface of the flange portion 23H. This band 34 prevents the arm 51c from rising. As shown in FIG. 1, a cylinder 27 is fixed to the flange portion 23a. An operating ring 28 is rotatably attached to the outside of the cylinder 27. The operating ring 28 includes a disk portion 28a located on the rear side and a support portion extending forward from the disk portion 28a. This support tube 28
A cylindrical screw member 29 is attached to the outside of b.

The screw member 29 is attached to the operation ring 28 so as not to be relatively rotatable, so that when the operation ring 28 is rotated, the screw member 29 is also rotated in synchronization. A rectangular thread groove 29a is spirally formed on the outer peripheral surface of the threaded member 29. Further, an eyepiece tube 3 is provided at the rear end of the cylinder body 27.
0 and a protective cover 3 disposed on the outside of this eyepiece tube 30.
1 is attached. The cylinder body 27, the operation ring 28,
With the screw member 29, eyepiece tube 30, and protective cover 31,
The rear half of the operating section A of the endoscope 10 is configured.

The observation system 11 includes two legs 2 of the core member 24 at the observation window 32a and the curved portion B of the tip cover member 32.
4e, 24e, the through hole 24d of the core material 24 in the straight part B, the internal space of the base 23, the cylinder 27, the eyepiece tube 30
and is supported by suitable means. On the other hand, the illumination system 12 is installed at the illumination window of the tip cover member 32, on the outside of each leg 24e of the core member 24 in the curved part B, between the core member 24 and the cover 25 in the straight part B, and on the base 23. It is housed in the internal space of the handle 21, is supported by appropriate means, and is connected to a lighting device (not shown) through the handle 21. After the observation system 11 and illumination system 12 are attached, a cover 33 is fixed to the lower outer side of the core material 24 in the curved portion B, as shown in FIG.

Next, the hood 50 will be explained. 13 is a plan view of the hood 50, FIG. 14 is a longitudinal sectional view thereof, FIG. 15 is an end view as viewed from the X arrow in FIG. 14, FIG. 16 is an end view as viewed from the X arrow in FIG. 14, and FIG. 14 is an enlarged cross-sectional view taken in the direction of the X arrow in FIG. 14, and FIG. 18 is an enlarged cross-sectional view taken in the direction of the X arrow in FIG. The hood 50 is formed to fit over the frame 22 of the main body 20, and is composed of a head cover portion 51, a straight cover portion 52, a curved cover portion 53, and a tip portion 54. ing.

The throat cover portion 51 constitutes the upper front half of the operating section A of the endoscope 10. A recess 51 a having a substantially semicircular cross section is formed inside the head cover portion 51 . In addition, the head cover part 51 has a forceps insertion opening 51b in the center of its upper part.
and an arm 5 extending rearward from the upper rear end.
It has 1C. A pilot pin 55 whose tip protrudes downward is fixed to the rear end of the arm 51C.

The straight cover part 52 constitutes the upper half of the straight part B of the insertion part B, and the curved cover part 53 and the tip forming part 54 constitute the upper half of the curved part B of the insertion part B. The straight cover portion 52 and the bending force 1<portion 53 have a semi-cylindrical shape. A latching claw 52a is provided at the tip of the straight cover portion 52.

As shown in FIG. 18, the latching claws 52a extend straight from the lower end of the arc portion 52b toward each other inward in the radial direction. The tip component 54 also has a semi-cylindrical shape. The inner surface of the distal end component 54 is composed of a large diameter straight part 54a on the proximal side, a very small diameter part 54b on the distal end side, and a tapered part 54c connecting the straight part 54a and the very small diameter part 54b. Two engaging pieces 54d are formed in the middle of the tip forming portion 54, extending in an arc from both circumferential ends.

The hood 50 is assembled to the main body 20 in the following manner. First, the hood 50 is positioned slightly forward of the main body 20. Then, the linear cover portion 52 of the hood 50 is placed on the frame 22 of the main body 20 in the linear portion B, and the hood 50 is slid on the frame 22 and moved rearward. When the hood 50 is moved backward, the latching claw 52a of the hood 50 and the latching claw 24b of the frame 22 are engaged, and the arm 51c of the hood 50 is inserted into the notch 23b of the frame 22, so that the pilot of the hood 50 The bottle 55 is inserted into the screw groove 29a of the screw member 29 of the main body 20.
engage with. Further, the operation ring 28 of the main body 20 is rotated, and the hood 50 is pulled rearward by the screw action of the screw a29a, so that the hood 50 is brought into close contact with the frame 22. In this state, both circumferential lower ends of the linear cover portion 52 of the hood 50 are positioned on the outside of the protrusion 24H of the core material 24 in the frame 22 and rest on the cover 25. , the latch claw 52a of the hood 50 is attached to the frame 22.
, and both lower ends of the curved cover portion 53 of the hood 50 in the circumferential direction are engaged with the latching claws 24b of the curved portion B.
, and both lower circumferential ends of the distal end portion 54 of the hood 50 rest on the upper surface of the distal end portion 26 of the frame 22, causing the hood 50 to rest on the upper surface of the core member 24. The mating piece 54d is now fitted into the engagement recess 26C of the frame 22. At this time, a space having a substantially semicircular cross section is formed along the longitudinal direction between the hood 50 and the frame 22, and this space becomes the forceps channel 13.

In the endoscope IO, there are three methods for inserting the forceps into the forceps channel 13, and one can be selected depending on the situation.

The first method is to perform the assembly as described above. That is, the tip of the forceps is inserted into the forceps insertion port 51b of the hood 50, gradually pushed into the forceps channel 13, and then protruded from the tip of the insertion portion B. This method is applicable only when the hard part of the forceps near the action part is short. If the hard part is short, if the internal space of the forceps channel 13 is large enough, the forceps will be in the curved part B!
This is because it can bend sufficiently.

If the hard part of the forceps near the action part is long, the forceps cannot bend the curved part B using the first method described above. In such cases, use the second or third method below.

The second method is to rotate the operation ring 28 of the endoscope 10 and move the hood 50 to the main body 2, as shown by the imaginary line in FIG.
The forceps channel 13 in the curved part B is moved relative to the front relative to the curved part B, and the main body 20 in the curved part B is separated from the hood 50 in the curved part B.
This method expands the internal space of the tube and allows forceps to be inserted through it. If you do this, the curved part B! Forceps channel 13 in
When passing through the forceps, the forceps need only have a small bend in the vicinity of the action part, and the forceps can be inserted easily. Then, the vicinity of the action part of the forceps is the curved part B.

After passing through the hood 5, rotate the operating ring 28 again to remove the hood 5.
0 to the rear and bring it into close contact with the main body 20.

Since the parts of the forceps other than the vicinity of the action part are not very hard, even if the hood 50 and the main body 20 are brought into close contact, there will be no problem when moving the forceps forward and backward later.

The third method is to completely remove the hood 50 from the main body 20. The hood 50 can be removed by reversing the installation procedure described above.

After removing the hood 50, place the forceps on the upper surface of the frame 22 of the main body 20, and then insert the hood 50 again from above.
is attached to the main body 20.

The endoscope 10 has not only the advantage that the forceps can be easily inserted into the forceps channel 13 as described above, but also has the advantage that the forceps can be easily inserted into the forceps channel 13 after using the endoscope 10.
It is also very convenient when cleaning 3. That is, when the hood 50 is removed from the main body 20 during cleaning, the inner surface of the hood 50 that forms the wall surface of the forceps channel 13 and the upper surface of the frame 22 of the main body 20 are exposed, so it is difficult to thoroughly wash these. can.

In the above embodiment, the mechanism for moving the hood 50 back and forth is the thread groove 29a of the screw member 29 and the pilot pin 55.
Although a screw mechanism according to the above is adopted, a link mechanism as shown in FIG. 19 may also be used.

That is, the lever 35 is rotatably attached to the main body 20 of the endoscope 10, and the tip of the lever 35 is rotatably engaged with the rear end of the hood 5005. As shown by the imaginary line in the figure,
When the lever 35 is pulled toward the user, the hood 50 moves forward.

Furthermore, as shown in FIG. 21, if a projecting piece 36 is attached to the upper surface of the frame 22 of the main body 20 near the top of the tip structure 26, the direction of the action section 7a of the forceps 70 can be changed. It's convenient. Compared to the case shown in FIG. 20 in which the protrusion 36 is not attached, the action portion 7a of the forceps 7 can be directed toward the front side in the case shown in FIG. 21 in which the protrusion 36 is attached.

Furthermore, in the above-mentioned embodiment, in the insertion portion B, the base side of the curved part B is a linear part B1, but the base side of the curved part B does not necessarily have to be truly straight. , as shown in FIG. 22, a part B corresponding to the straight part B1,
It does not matter if it is slightly curved. However, in the case of the second invention, in order to allow the main body 20 and the hood 50 to slide relative to each other, the portion B needs to be formed into an arc having the same radius of curvature.

This invention is not limited to the above-mentioned embodiments, and various embodiments can be adopted.

For example, in the above embodiment, the hood is attached to the upper side of the main body, but the hood may be arranged below the main body. In that case, it is easier and more convenient to arrange the forceps insertion holes laterally.

Further, the observation system may be constructed of an optical fiber, or may be constructed of a solid-state image sensor and electric wires electrically connected thereto.

Further, the treatment instrument insertion passage is not limited to a forceps channel, and may be a passage through which another treatment instrument is inserted.

[Effects of the Invention] As explained above, according to the first invention or the second invention of this application, even a treatment instrument that is difficult to bend can be easily inserted into a curved treatment instrument insertion passage. The excellent effect of being able to do this is achieved.

Further, according to the first invention, by removing the hood from the main body, the wall surface of the treatment instrument insertion passage can be exposed, so an excellent effect is achieved in that the treatment instrument insertion passage can be thoroughly cleaned. be done.

[Brief explanation of the drawing]

The drawings from FIG. 1 to FIG. 22 show embodiments of the invention of this application. Figure 1 is a partial vertical sectional view of the endoscope.
Figure 2 is a plan view of the same, Figure 3 is a sectional view taken in the direction of arrow I in Figure 1, and Figure 4 is
The figure is an end view as seen from the arrow ■ in FIG. 1. Also, Figure 5 shows the main body ~
FIG. 6 is a front view of the frame, and FIGS. 7 to 11 are an enlarged sectional view taken in the direction of arrow M in FIG. , (■) is an enlarged sectional view in the direction of arrows, and (2) is an enlarged sectional view in the direction of arrows, and FIG. 12 is an enlarged end view of FIG. 6 (■) in the direction of arrows. Furthermore, FIG. 13 is a plan view of the hood, FIG. 14 is a longitudinal sectional view thereof, FIG. 15 is an end view as viewed from the X arrow in FIG. 14, FIG. 16 is an end view as viewed from the X arrow in FIG. 14, and FIG. FIG. 18 is an enlarged sectional view taken in the direction of the Kariya arrow and an enlarged sectional view taken in the direction shown in the ■ arrow of FIG. 14, respectively. Moreover, FIG. 19 is another embodiment of the insertion section in the second invention, FIGS. 20 and 21 are enlarged longitudinal sectional views of the distal end of the insertion section, and FIG. 22 is still another embodiment of the insertion section. It is′. Moreover, FIG. 23 is a front view of a conventional endoscope, and FIG. 24 is a longitudinal sectional view of its insertion portion. 10... Endoscope, 11... Observation system, 12...
Lighting system, 13... Treatment instrument insertion passage, 20... Main body,
50...Humudo, B...Insertion part, B,...Straight line part (site located on the proximal side), B,...
curved part. B, ... Part located on the base side

Claims (2)

[Claims] (1) Equipped with an observation system, an illumination system, and a treatment instrument insertion passage,
An insertion section of an endoscope having an unbendable hard curved section at its distal end includes a main body including the above-mentioned observation system and illumination system, and a hood detachably attached to the main body. An insertion section of an endoscope, characterized in that a space is formed between the hood and the hood, and the space is used as a passage for inserting the treatment instrument. (2) Equipped with an observation system, an illumination system, and a treatment instrument insertion passage,
An insertion section of an endoscope having an unbendable hard curved section at the distal end includes a main body including the observation system and the illumination system, and a hood attached to the main body, and the main body and the hood are connected to each other. A space is formed in between, and this space is used as the treatment instrument insertion passage, and the curved part of the hood can come into contact with and separate from the curved part of the main body, and the curved part of the hood An insertion portion of an endoscope, wherein a portion of the main body located closer to the base than the curved portion engages with a portion of the main body located closer to the base than the curved portion so as to be movable in the longitudinal direction.