JPH05317242A - Pipeline device for endoscope - Google Patents

Abstract

PURPOSE:To provide a pipeline attachably and detachably in combination in an endoscope insertion part without impairing the insertion and removal properties to and from the examinee and without drastically degrading the curving performance inherent to the endoscope. CONSTITUTION:The endoscope insertion part 21, exclusive of its curving part and front end hard part, is freely attachably and detachably covered with a covering member 3 and in addition, a channel 2 is provided in combination and is integrally covered. The attachment and detachment of the endoscope insertion part 21 are easy. The front end of the channel 2 is freely fitted and held in a channel rest 4 of the front end hard part in such a manner that the front end can advance and retreat and can rotate. The drastic degradation of the curving performance of the endoscope does not arise. The most part (soft part 21a) of the endoscope insertion part 21 is provided in combination with the channel 2 and is integrally covered. The channel 2 is not covered with the covering member 3 even in the remaining curving part and front end constituting part and is merely provided in combination in the endoscope insertion part 21 and the attaching and detaching properties to and from the examinee are therefore not impaired.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a conduit device for an endoscope in which a conduit is removably attached to an endoscope, and in particular, insertion of a treatment tool, air supply / liquid supply, or inspection. The present invention relates to an endoscope conduit device used for collecting foreign substances existing in objects.

[0002]

2. Description of the Related Art As an apparatus for providing an endoscope without a conduit (hereinafter referred to as a channel) for air supply and liquid supply or forceps insertion, with an air supply and liquid supply function and a foreign matter collecting function, there is an actual open-air 1- 38
No. 566 (see FIG. 9A) and JP-A-3-296.
No. 34 (see FIG. 9B).

In Japanese Utility Model Laid-Open Publication No. 1-35866, FIG.
As shown in (a), a channel 62 composed of a tube or the like is arranged in the endoscope insertion portion 61 with a space provided.
It is provided side by side through a plurality of fixed mounting fittings 63, and forceps, gas, or liquid is inserted through this channel 62 for use.

The channel 62 is fixed with screws, adhesives, etc. at only two positions, that is, the mounting metal piece 63 at the extreme end and the rearmost end. In other words, for the mounting bracket 63 in the middle,
The channel 62 is not fixed and can move back and forth. Reference numeral 64 is a curved portion, and reference numeral 62a is a mouthpiece of the channel 62.

On the other hand, in Japanese Patent Laid-Open No. 3-29634, as shown in FIG. 9 (b), the channel 62 and the endoscope insertion portion 61 are integrally covered with a tubular covering member 66. Therefore, the channel 62 cannot be rotated and slid in the axial direction over the entire length of the insertion portion 61.

[0006]

[Problems to be Solved by the Invention] However, (1)
The one described in Japanese Utility Model Laid-Open No. 1-35866 has the following improvements.

(A) When the number of the mounting brackets 63 is small, it is difficult for the channels 62 to be provided side by side over the entire length of the endoscope insertion portion 61. That is, the channel 62 is separated from the insertion portion 61.

In addition, in order for the bending portion 64 to bend, the UP
When curved in a direction (the direction in which the channel 62 is inscribed in the curved portion 64), the channel 62 provided in the curved portion 64 is relatively contracted, and in the DOWN direction (the direction in which the channel 62 is circumscribed in the curved portion 64). When curved, it is necessary for channel 62 to extend relatively.

In FIG. 9 (a), when curved in the UP direction, the length of the channel 62 becomes excessive.
Since the tip of the channel 62 is fixed, the excess channel 62 is absorbed by the curved portion 63 on the hand side. This also contributes to the separation of the channel 62 from the insertion portion 61.

When the channel 62 is separated from the insertion portion 61, the separated channel 62 is caught in the lumen and cannot be inserted / removed during insertion / removal into / from the subject, and there is room for improvement.

(B) On the contrary, when the number of the mounting brackets 63 is large, the channel 62 is provided side by side over the entire endoscope insertion portion 61, so that there is a problem that the channel 62 is caught when inserting into and removing from the subject. It is unlikely to occur.

However, since the distal end of the channel 62 is fixed when it is bent in the UP direction, the excess length of the channel 62 cannot be absorbed and the bending is not so great, or the burden on the bending function of the endoscope is increased. It gets bigger.

A twist is also applied. That is, when an endoscope having a bending function in four directions is bent in the UP (or DOWN direction) and further applied in the RIGHT (or LEFT) direction, a twisting force is applied to the channel 62. Therefore, even when twisted, it is difficult to bend, and there is room for improvement.

On the other hand, in (2) Japanese Patent Application Laid-Open No. 3-29634 (see FIG. 9B), when a curve is applied in the UP direction, the channel 62 is the covering member 66 and the insertion portion 61.
Since it is integrally attached to the channel 62, the excess length of the channel 62 cannot be absorbed and the channel 62 is not bent so much. Also, DO
When the curve is applied in the WN direction, it is not possible to replenish the short length of the channel 62, and the curve is not applied so much.

Further, if the bending is forcibly applied, a large load is applied to the bending function of the endoscope, and the bending angle is decreased with time, or in extreme cases, the bending function is broken (for example, the bending wire is broken). There is a possibility that there is room for improvement.

The present invention has been made in view of the above circumstances, and does not impair the ability to insert into and remove from an object, does not significantly deteriorate the bending performance of the endoscope, and can be attached to the endoscope insertion portion. An object of the present invention is to provide a duct device for an endoscope in which a duct can be detachably attached.

[0017]

DISCLOSURE OF THE INVENTION An endoscope channel device according to the present invention is provided in parallel with an endoscope insertion portion having a distal end forming portion and a curved portion at the distal end, and a treatment instrument is inserted therethrough and air is supplied. -A conduit member for performing at least one of liquid feeding or suction, and the conduit member being loosely fitted and held so as to be capable of advancing and retracting and being rotatable, and mounted near the distal end of the endoscope insertion portion. And a fixing member that covers at least the endoscope insertion portion from the proximal side of the endoscope bending portion and allows the endoscope to be detachable, and the endoscope member to be attached to the conduit member. And a covering member that integrally covers them.

[0018]

According to the present invention, the covering member is detachably covered with the exception of the bending portion and the distal end constituting portion of the endoscope insertion portion, and the conduit member is also provided and integrally covered. It is easy to attach and detach the endoscope insertion portion.

The distal end of the conduit member is loosely fitted to and held by a fixing member attached near the distal end of the endoscope insertion portion so as to be movable back and forth and rotatably. The bending performance of the endoscope is not significantly deteriorated.

Most of the endoscope insertion portion is
It is provided side by side with the duct member and is integrally covered. further,
Even in the remaining curved portion and the tip forming portion, the conduit member is not covered with the covering member and is provided side by side with the endoscope insertion portion, so that the insertion / removal property with respect to the subject is not impaired.

[0021]

Embodiments of the present invention will be described with reference to the drawings. 1 to 3 relate to a first embodiment of the present invention, FIG. 1 is an overall configuration diagram of a detachable endoscope channel device, and FIG. 2 is a partial cross-sectional view of a distal end of the endoscope channel device. FIG. 3 is an explanatory diagram showing an operation associated with bending of the device shown in FIG. 1.

The endoscope 21 shown in FIGS. 1 to 3 has an operating portion 23 and the inserting portion 21, and the inserting portion 23 is a slender and flexible soft portion in order from the operating portion side. 21a,
The bendable portion 24 and the tip hard portion 25 are connected.

On the other hand, as shown in FIG. 2, in the endoscope channel device 1, the channel 2 as a channel member is provided side by side with the endoscope insertion portion 21, and the endoscope insertion portion 21 is detachable. It is what As shown in FIG. 7, this endoscope channel device 1 has a large-diameter and hard proximal end portion 1a in order from the proximal side.
It is connected to the slender and flexible flexible tube portion 1b. The flexible tube portion 1b includes the channel 2 and a scope insertion tube 3c that detachably inserts the endoscope insertion portion 21 in the axial direction.
The channel 2 and the scope insertion tube 3c are provided side by side, and the covering member 3 integrally covers the channel 2 and the scope insertion tube 3c.

An optical adapter 22 constituting a distal end hard portion 25 is detachably provided at the distal end of the endoscope insertion portion 21. This optical adapter 22 has
A ring-shaped member made of metal or the like, and a channel receiver 4 as a fixing member that constitutes the endoscope channel device 1 is fixed by brazing or the like.

The flexible tube portion 1b of the endoscope channel device 1
As shown in FIGS. 2 and 3, from the vicinity of the insertion section side of the endoscope operation section 23 to the flexible section 21a of the insertion section 21, that is, before the bending section 24 is covered with the covering member 3. ing. The scope insertion tube 3c is also formed to have the same length.

Further, the flexible tube portion 1b of the endoscope channel device 1
Has a rigid mounting base 5 fixed to its tip.
An opening of the scope insertion tube 3c is provided on the front end surface of the mounting base 5, and the channel 2 extends in the front end direction.

The channel 2 is inserted into the channel receiver 4 and loosely fitted therein. Therefore, the channel 2 is movable back and forth and rotatable with respect to the channel receiver 4. Further, as shown in FIG. 3, the channel 2 is formed longer than the channel receiver 4 so as not to fall off from the channel receiver 4 when the DOWN curve of the endoscope is maximum.

The proximal end portion 1a of the endoscope conduit device 1 is
An opening of a scope through hole (not shown) communicating with the scope insertion tube 3c is provided on the proximal end surface thereof, and a channel through hole (not shown) through which the channel 2 is inserted is provided. A connection pipe (not shown) is attached to the scope through hole, and the scope through hole and the scope insertion pipe 3c communicate with each other through the connection pipe. The scope through hole is formed so that the insertion section side of the endoscope operation section 23 can be accommodated therein.

A channel mouthpiece 3d is attached to the channel through hole, and the channel mouthpiece 3d and the channel 2 are connected for communication. Channel 2
Is attached to the channel base 3d on the side of the base end 1a and fixed by adhesion or the like. Also, this channel 2
Is attached to the bending portion 24 with the tip end side being inserted into the channel receiver 4. The channel 2 is fixed to the attachment base 5 by adhesion or the like, but in the endoscope distal end hard portion 25, as described above, it is only loosely fitted and inserted into the channel receiver 4.
It is held so that it can move back and forth.

Further, the covering member 3 is provided with a screw 6 which is screwed from the outer periphery of the base end portion 1a toward the axial center. The screw 6 is brought into contact with or screwed to the endoscope operation section 23 to fix the endoscope to the covering member 3. When the screw 6 is loosened, the endoscope can be removed, and thus the endoscope insertion portion 21 can be fixed to the scope insertion tube 3c of the covering member 3 while being detachable. There is.

The optical adapter 22 and the endoscope are attached in the same structure as that described in Japanese Utility Model Laid-Open No. 63-50301. The optical adapter 22 may be a hood having no optical system.

The means for placing the channel 2 and the endoscope insertion portion 21 side by side on the hand side of the bending portion 24 is not limited to the above-mentioned means, and may be the conventional means shown in FIG.

With the above structure, as shown in FIG.
When 4 is bent, the channel 2 slides in the channel receiver 4 and projects during UP. Also, curved DOW
When N is the maximum, the channel 2 slides in the channel receiver 4 and is drawn in almost to the end surface of the channel receiver 4. However, it does not fall off from the channel receiver 4.

When a twist is applied during bending,
The twisting force applied to the channel 2 is released by the rotation of the channel 2 in the channel receiver 4.

In this embodiment, the channel 2 is operated during the bending operation.
Does not resist the bending operation of the bending portion 24, and a smooth bending operation can be obtained. Further, since the channel 2 is rotatably held by the channel receiver 4 even when twisted, the channel 2 is not twisted.

In this embodiment, the channel 2 remains attached to the endoscope insertion portion 21 regardless of whether the endoscope insertion portion 21 meanders or not, and the surface of the covering member 3 is smooth. In addition, the channel 2 is not caught by the subject when it is inserted into or removed from the subject. In other words, it does not impair insertability.

In addition, in this embodiment, a channel can be provided side by side with an endoscope having no channel. By using this channel, various treatments by inserting a treatment tool, air supply,
Liquid transfer, suction, or the like can be performed.

FIGS. 4 and 5 relate to the second embodiment of the present invention, and FIG. 4 is a partial cross-sectional view of the distal end of the endoscope channel device, FIG.
FIG. 5 is an explanatory view showing an operation associated with bending of the device shown in FIG. 4.

As shown in FIG. 4, a metallic or resinous tip cap 7 is fitted into the tip of the channel 2 of the first embodiment shown in FIG. The tip cap 7 has a protrusion 7a having an outer diameter larger than the inner diameter of the channel receiver 4 and an inner diameter substantially the same as the inner diameter of the channel 2 in order from the rear end side fitted after the channel 2, and the protrusion 7a.
The thread binding portion 7b having a smaller diameter and the tip portion 7c having a diameter slightly larger than that of the protruding portion 7a are provided. The tip mouthpiece 7 is bound together with a thread from the outer periphery of the channel 2 at the thread binding portion 7b and then fixed to the channel 2 by adhesion or the like.
The protrusion 7a is formed in a taper with a diameter decreasing toward the rear end.

With the tip base 7 attached, the channel 2 is provided with a channel receiver 4 at the protruding portion 7a.
A stopper portion 2a having a diameter larger than the inner diameter of the stopper 2a is formed. Therefore, even if an overload is applied during bending, the channel 2 will not fall off the channel receiver 4. The rear end of the stopper portion 2a, that is, the portion in contact with the channel receiver 4 is tapered so that the diameter becomes smaller toward the rear end side, and the force at the time of contact is relaxed. .. This reduces the risk of breakage of the channel 2.

The outer diameter of the distal end portion 7c of the distal end cap 7 is substantially the same as the outer diameter of the channel receiver 4 so that the insertability does not deteriorate when the endoscope is mounted and used. In short, the thread of the channel 2 (thread binding portion 7b) is
It is sufficient if the outer diameter is displaced to the tip side and does not unwind. Other configurations and operations similar to those of the first embodiment are designated by the same reference numerals and description thereof will be omitted.

With the above structure, as shown in FIG.
At the time of WN, the channel 2 slides in the channel receiver 4 and is drawn to the end surface of the channel receiver 4. At this time (when the DOWN is maximally bent), at the point D in the drawing, the channel receiver 4 abuts against the stopper portion 2a.
In addition, even at the time of maximum bending, the stopper portion 2 should be placed at a position where it does not come into contact.
A may be formed, and when an external force is applied, it may abut.

In the configuration of the first embodiment, the curved DOWN
At the time of N, at a position where the channel 2 is attached to the curved portion 24, if the channel 2 is caught by a protrusion or the like inside the subject and an excessive force is applied, the channel 2 may come out of the channel receiver 4.

On the other hand, in the second embodiment, at the position where the channel 2 is attached to the curved portion 24, the channel 2 may come out of the channel receiver 4 even if it is caught by a protrusion or the like inside the subject. Absent. Other functions and effects are the same as those in the first embodiment, and the description thereof will be omitted.

FIGS. 6 and 7 relate to a third embodiment of the present invention, and FIG. 6 is a partial cross-sectional view of the distal end of the endoscope channel device, FIG.
FIG. 7 is an explanatory diagram showing an operation associated with bending of the device shown in FIG. 6.

As shown in FIG. 6, in the endoscope channel device of the present embodiment, the tip base 8 is fitted into the tip of the channel 2 as in the second embodiment, and in addition, the channel 2 is further added.
A slide holding tube 9 is loosely fitted to the outside of the channel 2 so as to be slidable in the vicinity of the tip end of the slide holding tube 9.

The slide holding tube 9 is made of a metallic pipe-shaped member, and has a threaded portion 9a at the rear end thereof. The contact tube 10 screwed to the threaded portion 9a has the abutting tube 10 of the endoscope bending portion 24. It comes in contact with the outer circumference of the tip. Further, the slide holding tube 9 has a large diameter portion 9b having an outer diameter larger than the inner diameter of the channel receiver 4 at the tip, and the tip of the large diameter portion 9b is caulked at the caulking portion 8a of the tip mouthpiece 8 by It is fixed to the tip base 8. Furthermore, the slide holding tube 9 is loosely fitted in the channel receiver 4A provided in the optical adapter 22 at the rear end of the large diameter portion 9b so as to be able to move back and forth.

The large diameter portion 9b of the slide holding tube 9 is
The taper is formed so that the diameter becomes smaller toward the rear end side, and the taper is formed at substantially the same inclination as the taper of the stopper portion 2a. The taper of the large diameter portion 9b and the taper of the stopper portion 2a are arranged with a slight gap.

Other than that, the same components and operations as those of the second embodiment are designated by the same reference numerals and the description thereof will be omitted.

With the above structure, as shown in FIG.
At this time, the slide holding tube 9 slides in the channel receiver 4A and projects from the front end surface of the channel receiver 4A.
At this time, at the point U in the figure, the front end surface of the fixing member 10 lightly abuts the rear end surface of the channel receiver 4A. The fixing member 10 may be located at a position close to the rear end of the channel receiver 4A without abutting.

On the other hand, when the DOWN is at maximum, the rear end of the large diameter portion 9b of the slide holding tube 9 lightly abuts on the front end surface of the channel receiver 4A. At this time, inside the slide holding tube 9, the stopper portion 2 is formed in the taper of the large diameter portion 9b.
The taper of a is not in contact.

As the material of the channel 2, it is necessary to have flexibility, and therefore synthetic rubber or resin is used. Therefore, when the rear end of the stopper portion 2a of the channel 2 hits the channel receiver 4A at the time of bending DOWN, the contact portion of the channel 2 is damaged due to repeated or aging (deterioration), and the tip cap 7 falls off. It is also possible. In the third embodiment, since only the metal slide holding tube 9 contacts the channel receiver 4A, the risk of damaging the channel 2 can be reduced and the tip cap 8 can be prevented from falling off.

FIG. 8 is a perspective view of an endoscope conduit device according to a fourth embodiment of the present invention. As shown in FIG. 8, in the endoscope conduit device of the present embodiment, a tip base 11 made of a metallic pipe member is externally fitted to the channel 2 and fixed by adhesion or the like. A metal pin 11 a is integrally provided on the tip base 11 so as to project.

The channel receiver 13 is externally fitted and fixed to the optical adapter 22 attached to the tip of the endoscope insertion portion 21. In addition, you may comprise integrally. The channel receiver 13 mounts the optical adapter 22 and has a through hole 13a in parallel with which the channel 2 can be mounted. The through hole 13a allows the tip cap 11 fixed to the channel 2 to be inserted and removed freely, and further the guide groove 1 so that the pin 11a can be advanced and retracted.
3b is formed.

The position of the guide groove 13b is not located in the same direction as the pin 11a of the tip cap 11 provided in the channel 2, but is provided at a position opposite by 180 degrees, for example.
Other than that, regarding the same configuration and operation as the second embodiment,
The same reference numerals are given and the description is omitted.

With the above structure, the channel 2 is twisted together with the tip cap 11 so that the pin 11a is aligned with the guide groove 13b provided on the inner peripheral surface of the channel receiver 4, and the tip cap 11 is attached to the channel receiver 13. insert.
After being inserted, the tip 13 from the channel receiver 13
Is protruded, the twist of the channel 2 can be released. Therefore, together with the tip base 11 fixed to the pin 11, the pin 11
The position a is different from the position of the guide groove portion 13b of the channel receiver 13. As a result, the channel 2 does not drop from the channel receiver 13.

When bent, the pin 11a abuts the optical adapter 22.

In the second and third embodiments, when the optical adapter 22 of the endoscope is replaced, the channel 2 cannot be removed at the front and rear ends, and it is necessary to replace the complete device. It was On the other hand, in the fourth embodiment, only the optical adapter 22 can be replaced, and the channel 2 does not drop from the channel receiver 13.
Other functions and effects are the same as those in the first embodiment, and the description thereof will be omitted.

[0059]

According to the endoscope channel device of the present invention, insertion / removal of an endoscope is not impaired, the bending performance of the endoscope is not significantly deteriorated, and the endoscope is inserted. The effect is that a pipe can be attached to and detached from the section.

[Brief description of drawings]

FIG. 1 is an overall configuration diagram of a duct device for a detachable endoscope according to a first embodiment.

FIG. 2 is a partial cross-sectional view of the distal end of the endoscope channel device.

FIG. 3 is an explanatory view showing an operation associated with bending of the device shown in FIG.

FIG. 4 is a partial cross-sectional view of the distal end of the endoscope channel device according to the second embodiment.

5 is an explanatory view showing an operation associated with bending of the device shown in FIG.

FIG. 6 is a partial cross-sectional view of the distal end of the endoscope channel device according to the third embodiment.

FIG. 7 is an explanatory view showing an operation associated with bending of the device shown in FIG.

FIG. 8 is a perspective view of an endoscope conduit device according to a fourth embodiment.

FIG. 9 is a perspective view of an endoscope conduit device according to a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Endoscope channel device 2 ... Channel 3 ... Covering member 3c ... Scope insertion tube 4 ... Channel receiving 5 ... Mounting bracket 21 ... Endoscope insertion part 22 ... Optical adapter 23 ... Endoscope operation part 24 ... Inside Curved part of endoscope

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[Procedure amendment]

[Submission date] November 25, 1992

[Procedure Amendment 1]

[Document name to be amended] Statement

[Name of item to be corrected] 0022

[Correction method] Change

[Correction content]

The endoscope shown in FIGS. 1 to 3 has an operating section 2
3 and and a interpolation join the club 21, the insertion portion 21, the operation section 2
The slender and flexible portion 21a, the bendable bending portion 24, and the distal end hard portion 25 are connected in order from the third side .

[Procedure Amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0052

[Correction method] Change

[Correction content]

As the material of the channel 2, it is necessary to have flexibility, and therefore synthetic rubber or resin is used. Therefore, when the rear end of the stopper portion 2a of the channel 2 hits the channel receiver 4A at the time of bending DOWN, the contact portion of the channel 2 may be damaged due to repeated or aging (deterioration), and the tip cap 7 may fall off. Can also be considered. In the third embodiment, since only the metal slide holding tube 9 contacts the channel receiver 4A, the risk of damaging the channel 2 can be reduced and the tip cap 8 can be prevented from falling off.

[Procedure 3]

[Document name to be corrected] Drawing

[Name of item to be corrected] Figure 2

[Correction method] Change

[Correction content]

[Fig. 2]

Claims (1)

[Claims] 1. An endoscope insertion portion having a distal end constituent portion and a curved portion at the distal end, which are arranged side by side, through which a treatment tool is inserted, air supply / liquid supply,
Alternatively, a conduit member for performing at least one of suction, and a fixing member that is loosely fitted and held so that the conduit member can be moved forward and backward and rotatably, and that is attached near the distal end of the endoscope insertion portion. From the proximal side of the endoscope bending portion, at least the endoscope insertion portion is covered and the endoscope is detachable, and the endoscope insertion portion is provided integrally with the duct member. A covering device for covering, and a conduit device for an endoscope, comprising: