JP2003169774A - Channel tube connecting structure of pollution prevention type endoscope - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a channel tube connecting structure of a pollution prevention type endoscope capable of easily and smoothly connecting and separating a channel tube for multi-lumens extending from the base end of a jacket sheath to and from endoscope side tubes. <P>SOLUTION: The tunnel tube 32 is formed with side holes 324, 325, and 326 individually communicated to a plurality of tubes 321, 322, and 323 with their positions deviated axially in the side adjacent to its base, and end part openings 27a, 28a, and 29a of the plurality of endoscope side tubes 27, 28, and 29 corresponding to the plurality of tubes 321, 322, and 323 are formed in the internal circumferential surface of a connecting hole 210, into/from which the channel tube 32 can be freely inserted/released, corresponding to the positions of the side holes 324, 325, and 326 of the channel tube 32. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a channel tube connection structure for a pollution prevention endoscope in which an outer sheath is detachably attached to an insertion portion of the endoscope.

[0002]

2. Description of the Related Art In order to prevent the insertion portion of an endoscope to be inserted into the body from being contaminated by waste liquid in the body, not only the insertion portion of the endoscope is covered with an outer sheath, but also a fluid or a treatment is used. It is necessary to provide a channel tube that communicates with the inside of the body on the side of the outer sheath for passing tools and the like.

Such a channel tube is inserted through an outer sheath which is detachably covered by an insertion portion of an endoscope, and a proximal end portion extending from a proximal end of the outer sheath has an endoscope side conduit. It is configured to be connectable to and detachable from.

[0004]

It is necessary for an endoscope to be provided with various conduits for air supply, water supply, suction (and insertion of a treatment tool). Therefore, it is convenient to use a so-called multi-lumen tube in which a plurality of conduits are formed in parallel in the axial direction as the channel tube as described above (Japanese Patent Laid-Open No. 3-29634, etc.).

However, if a multi-lumen tube is used as the channel tube, the connecting direction and the number of times of operation for connecting and disconnecting the channel tube to the endoscope side duct become plural, respectively. The work for was complicated.

In view of this, the present invention provides a channel tube for a pollution-preventing endoscope capable of easily and smoothly connecting and disconnecting the multi-lumen channel tube extending from the proximal end of the outer sheath to the endoscope side conduit. It is intended to provide a connection structure.

[0007]

In order to achieve the above object, the channel tube connection structure for a pollution-preventing endoscope according to the present invention is provided in an outer sheath which is detachably covered with an insertion portion of the endoscope. A plurality of conduits are formed parallel to each other in the axial direction in the inserted channel tube, and at the proximal end portion of the channel tube extending from the proximal end side of the outer sheath, the plurality of conduits are respectively connected to the endoscope side conduits. In a channel tube connection structure for a pollution prevention endoscope that is configured to be connectable and separable with respect to each other, a side hole that individually communicates with a plurality of conduits is axially positioned on the side surface near the proximal end of the channel tube. The end openings of the plurality of endoscope side conduits corresponding to the plurality of conduits are aligned with the side holes of the channel tube on the inner peripheral surface of the connection hole into which the channel tube can be inserted and removed. Correspond It is obtained by forming.

If the end opening of the endoscope side conduit is formed in a circumferential groove shape over the entire circumference of the inner peripheral surface of the connection hole,
Regardless of the state of rotation of the channel tube about the axis, the conduits are surely connected.

[0009]

Embodiments of the present invention will be described with reference to the drawings. FIG. 3 and FIG. 4 show the entire configuration of a device for an anti-contamination endoscope, and FIG. 3 shows the insertion section 1 of the endoscope 10.
1 shows a state in which the outer sheath 30 is not covered, and FIG. 4 shows a state in which the insertion portion 11 of the endoscope 10 is covered with the outer sheath 30.

The insertion portion 11 of the endoscope 10 is a flexible tube, and an observation window 12 and an illumination window (not shown) are arranged at the distal end of the insertion portion 11, and at the proximal end of the insertion portion 11. The operation unit 13 is connected.

A transparent distal end cap 31 is attached to the distal end portion of an outer sheath 30 which is detachably covered with the insertion portion 11, and a suction port 33 and an air / water feeding nozzle port 34 are opened on the surface of the distal end cap 31. Has been formed.

A channel tube 32, which is a so-called multi-lumen tube, is inserted and arranged in the outer sheath 30 over the entire length thereof.
The proximal end portion of the sheath extends from the proximal end side of the outer sheath 30.

As shown in FIG. 5, the channel tube 32 has three air supply pipes 321 and 322 which communicate with the air supply and water supply nozzle holes 34 and a suction pipe 323 which communicates with the suction port 33. Two pipe lines are formed in parallel in the axial direction. The proximal ends of the air supply pipe 321, the water supply pipe 322, and the suction pipe 323 are all closed by the plugging / closing member 320.

On the side surface near the base end of the channel tube 32, side holes (air supply side hole 324, water supply side hole 325 and suction side) which communicate with the air supply line 321, the water supply line 322 and the suction line 323, respectively. The side holes 326) are formed so as to be displaced in the axial direction. Then, when the outer sheath 30 is covered with the insertion portion 11, the proximal end portion of the channel tube 32 is inserted and connected to the connection hole 210 of the tube connector 21 described later.

Returning to FIGS. 3 and 4, the operation section 13 of the endoscope 10 performs an eyepiece section 14 for enlarging the endoscope observation image transmitted by the image guide fiber bundle, and an air / water feeding operation. An air supply / water supply operation valve 15 for suction, a suction operation valve 16 for performing a suction operation, and the like are arranged.

Reference numerals 17, 18 and 19 denote tubes for air supply, water supply and suction, which are connected to the air / water supply operation valve 15 and the suction operation valve 16 via a connection adapter 20 which is detachable from the operation section 13. Has been done. Such a connection adapter 2
No. 0 is described in JP-A-4-354928 and the like.

The air supply / water supply tubes 17 and 18 are connected at their proximal ends to an air / water supply device 41 provided in the light source device 40, and the proximal end of the suction tube 19 communicates with an external suction device 50. It is connected.

From the connection adapter 20, an air supply / connection tube 27, a water supply connection tube 28 and a suction connection tube 2 which communicate with the air / water supply operation valve 15 and the suction operation valve 16.
9 extends, and the tube connector 21 attached to the tip thereof is arranged along the side surface of the operation portion 13.

FIG. 1 shows a state in which the proximal end portion of the channel tube 32 extending from the outer sheath 30 is connected to the tube connector 21 of the endoscope 10, and FIG. 2 shows that state in the tube axis direction. It is a perspective view of the state where it saw.

To the tube connector 21, the respective ends of the air supply connection tube 27, the water supply connection tube 28 and the suction connection tube 29 are inserted and fixed from one end side, and the channel tube 32 can be inserted and removed at the other end side. Connection hole 2
10 are formed.

When the channel tube 32 is inserted into the connection hole 210, the channel tube 3
All of the air supply side holes 324, the water supply side holes 325 and the suction side holes 326 formed in No. 2 are designed to penetrate into the connection hole 210.

On the inner peripheral surface of such a connection hole 210, the air supply side hole 324, the water supply side hole 325 and An air supply passage end opening 27a, a water supply passage end opening 28a, and a suction passage end opening 29a are formed in a circumferential groove shape at the respective positions facing the suction side holes 326.

The air supply passage end opening 27a, the water supply passage end opening 28a and the suction passage end opening 29a are connected to each other through the air supply communication hole 27b, the water supply communication hole 28b and the suction communication hole 29b. It communicates with the tube 27, the water supply connection tube 28, and the suction connection tube 29.

An O-ring 22 for sealing is attached at a position sandwiching the air supply passage end opening 27a, the water supply passage end opening 28a, and the suction passage end opening 29a in the axial direction.
Fluid leakage from the gap between the inner peripheral surface of the connection hole 210 and the outer peripheral surface of the channel tube 32 is prevented.

Therefore, when the channel tube 32 is fully inserted into the connection hole 210 of the tube connector 21, the air supply side hole 324 and the water supply side hole 325 regardless of the state of rotation of the channel tube 32 about the axis.
Further, via the suction side hole 326, the air supply conduit 321 and the air supply connection tube 27, and the water supply conduit 322 and the water supply connection tube 2
8 and the suction conduit 323 and the suction connection tube 29 communicate at the same time in one operation, and if the channel tube 32 is pulled in the opposite direction, the channel tube 32 is connected to the connection hole 21.
It is pulled out from 0 and the above communication state is released at the same time by one operation.

[0026]

According to the present invention, a side hole that individually communicates with a plurality of conduits of a channel tube is provided on the side surface of the multi-lumen channel tube near the proximal end extending from the proximal end of the sheath sheath. The channel tubes are formed by shifting the positions in the same direction, and the end openings of the plurality of endoscope side conduits corresponding to the plurality of channel tubes are formed on the inner peripheral surface of the connection hole into which the channel tube can be inserted and removed. The channel tube of the outer sheath can be easily and smoothly connected to and disconnected from the endoscope-side duct by a single operation, because the channel tube of the outer sheath is formed to correspond in position.

If the end opening of the endoscope side conduit is formed in a circumferential groove shape over the entire circumference of the inner peripheral surface of the connection hole, no matter how the channel tube rotates about the axis, Reliable connection of each pipeline.

[Brief description of drawings]

FIG. 1 is a side sectional view of a tube connector of a pollution-preventing endoscope according to an embodiment of the present invention.

FIG. 2 is a front perspective view of the tube connector of the pollution prevention endoscope according to the embodiment of the present invention.

FIG. 3 is a side external view of a set of devices in a state where the insertion portion of the pollution prevention endoscope according to the embodiment of the present invention is not covered with the outer sheath.

FIG. 4 is a side external view of a set of devices in a state in which the insertion portion of the pollution prevention endoscope according to the embodiment of the present invention is covered with an outer sheath.

FIG. 5 is a side sectional view of the vicinity of the proximal end of the channel tube of the pollution prevention endoscope according to the embodiment of the present invention.

[Explanation of symbols]

10 endoscope 11 Insert 13 Operation part 21 Tube Connector 27 Air supply connection tube (endoscope side conduit) 27a Airway end opening 28 Water supply connection tube (endoscope side conduit) 28a Water channel end opening 29 Suction connection tube (endoscope side conduit) 29a Suction path end opening 30 mantle sheath 32 channel tube 210 connection hole 321 Air supply line 322 Water pipeline 323 Suction line 324 Air supply side hole 325 Water supply side hole 326 suction side hole

Claims (2)

[Claims] 1. A plurality of conduits are formed parallel to each other in an axial direction in a channel tube that is inserted and arranged in an outer sheath that is detachably covered by an insertion portion of an endoscope, and is formed from a proximal end side of the outer sheath. In the channel tube connection structure of the pollution prevention endoscope, wherein the plurality of conduits are connected to and separable from the endoscope side conduit at the base end portion of the extending channel tube, On the side surface near the proximal end of the tube, side holes that individually communicate with the plurality of conduits are formed at different positions in the axial direction, and a plurality of endoscope side conduits corresponding to the plurality of conduits are formed. The end opening of the channel tube is connected to the side hole of the channel tube at the inner peripheral surface of the connection hole into which the channel tube can be inserted and removed, and the end opening of the channel tube is connected to the channel tube of the pollution prevention endoscope. Construction. 2. The pollution control endoscope according to claim 1, wherein the end opening of the endoscope side conduit is formed in a circumferential groove shape over the entire circumference of the inner peripheral surface of the connection hole. Channel tube connection structure.