JPH1176153A - Endoscope - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a washing liquid and a disinfectant from flowing back to the operator side and leaking during washing and to prevent waste in a suction pipe from entering an air feed pipe and a water feed pipe. SOLUTION: A forceps insertion duct 16 is extended from a forceps slot 10 in a control part 4, an air feed duct 18 and a water feed duct 20 are extended from an air/water feed cylinder 12, and a suction duct 22 is extended from a suction cylinder 14. The suction duct 22 and the forceps insertion duct 16 are combined to form a confluent pipe 26, and the air feed duct 18 and the water feed duct 20 are combined to form a confluent pipe 30, with the confluent pipes 26, 30 combined to form a single confluent pipe 34. An air feed pipe 42 and a water feed pipe 44 in a light guide cable 8 are connected to the air/water feed cylinder 12, and the suction pipe 46 is connected to the suction cylinder 14. One-way valves 52, 54 for preventing reverse flow are placed, respectively, at the parts of the air feed pipe 42 and the water feed pipe 44 connected to the air/water feed cylinder 12.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an endoscope used for examination or treatment of a body cavity.

[0002]

2. Description of the Related Art An endoscope comprises an operation section, an insertion section, an air / water supply cylinder provided in the operation section, a suction cylinder provided in the operation section, and the air / water supply section in the operation section. An air supply pipe and a water supply pipe extending from the cylinder to the insertion section, and a suction pipe extending from the suction cylinder to the insertion section in the operation section are provided. A light guide cable is connected to the operation unit, an optical fiber extending from the operation unit to the insertion unit is housed in the light guide cable, and an air supply pipe and a water supply pipe connected to the air / water supply cylinder. And a suction tube connected to the suction cylinder. After such an endoscope is used for inspection or treatment inside a body cavity, not only the outer surface of the insertion section to be inserted into the body cavity, but also a conduit or the like built into the insertion section or the operation section. Since dirt adheres to the pipes in the light guide cable, in particular, the suction pipe line, the suction cylinder, and the suction pipe, these pipes and cylinders also need to be cleaned and disinfected.

[0003] Cleaning and disinfection of an endoscope is generally performed by flowing a cleaning solution or a disinfecting solution toward an end of an insertion portion at an end of a light guide cable through an air supply pipe, a water supply pipe, and a suction pipe. . On the other hand, there are various types of endoscopes, and an air supply pipe, a water supply pipe, and a suction pipe are merged into a single merge pipe in the operation unit, and the merge pipe extends in the insertion section. There are also things.

[0004]

SUMMARY OF THE INVENTION In this type of endoscope,
During cleaning, if a cleaning solution or disinfectant flows from the air supply pipe, water supply pipe, or suction pipe toward the tip of the insertion section, the cleaning liquid or disinfectant should be transferred from the junction to the end of the light guide cable, that is, close to the hand when cleaning. The solution was backflowed and overflowed, and there was a problem that washing was difficult. In addition, when a cleaning solution or a disinfectant solution flows from the suction pipe, these liquids flow back from the junction, and the dirt in the suction pipe, suction cylinder, and suction pipe may enter the air pipe or water pipe through which the dirt does not pass. Is not preferred. The present invention has been devised in view of the above circumstances, and an object of the present invention is that, during cleaning, a cleaning solution or a disinfecting solution does not flow backward and overflow on the hand side, and cleaning can be easily performed. Another object of the present invention is to provide an endoscope that prevents dirt in a suction pipe, a suction cylinder, and a suction pipe from entering into an air supply pipe or a water supply pipe through which dirt does not pass.

[0005]

To achieve the above object, the present invention provides an operation unit, an insertion unit, an air / water supply cylinder provided in the operation unit, and a suction cylinder provided in the operation unit. An air supply pipe and a water supply pipe extending from the air / water supply cylinder to the insertion section in the operation section; a suction pipe extending from the suction cylinder to the insertion section in the operation section; An air supply pipe and a water supply pipe connected to the air supply / water supply cylinder from outside, and a suction pipe connected to the suction cylinder from the outside of the operation unit, wherein the air supply pipe, the water supply pipe, and the suction pipe are provided. In the endoscope in which the merging tube is merged into a single merging tube in the operating portion, and the merging tube extends in the insertion portion, the air feeding tube and the water feeding tube are respectively directed in a direction toward the air / water feeding cylinder. Fluid movement, Characterized in that a backflow prevention mechanism for preventing movement of fluid in the direction away from the air and water feeding cylinder. Further, the invention is characterized in that the backflow prevention mechanism is provided at a portion where an air supply pipe and a water supply pipe are connected to the air / water supply cylinder. Further, according to the present invention, a light guide cable is connected to the operation unit,
The air supply pipe, the water supply pipe, and the suction pipe are arranged in the light guide cable. Also,
The present invention is characterized in that the backflow prevention mechanism is a one-way valve.

In the present invention, when a cleaning liquid or a disinfecting liquid is supplied to the suction pipe from the end of the suction pipe, these liquids are discharged from the suction pipe through the suction cylinder, the suction pipe, and the junction pipe, and discharged from the tip of the insertion section. Is done. When these liquids flow, a backflow prevention mechanism is provided, so that the liquid does not flow backward from the merge pipe to the air supply pipe or the water supply pipe.

[0007]

Next, an embodiment of the present invention will be described. FIG. 1 is a schematic sectional view of the endoscope at the time of cleaning,
FIG. 2 shows a cross-sectional view of the one-way valve portion. The endoscope 2 according to the present embodiment includes an operation unit 4, an insertion unit 6, a light guide cable 8, and the like. The insertion section 6 is formed of a flexible tube, and is connected to the distal end of the operation section 4. The operation section 4 is provided with a forceps insertion port 10, and further provided with an air / water supply cylinder 12 and a suction cylinder 14. A forceps insertion conduit 16 extends from the forceps insertion opening 10 toward the insertion portion 6, and an air supply conduit 18 and a water supply conduit 20 extend from the air / water supply cylinder 12 toward the insertion portion 6. A suction pipe 22 extends from the suction cylinder 14 toward the insertion portion 6. In the operation section 4, the suction pipe 22 and the forceps insertion pipe 16 are joined via a junction 24 to form a junction pipe 26, and the air supply pipe 18
And the water supply line 20 become a merging pipe 30 via a merging point 28, and these merging pipes 26 and 30 merge via a merging point 32 in the operation unit 4 to form a single merging pipe 34, and this merging pipe 34 Extends through the insertion portion 6 to its tip.

An optical fiber (not shown) extends into the light guide cable 8, extends through the operating section 4 to the tip of the insertion section 6, and is connected to an end of the light guide cable 8. A connector section 36 is provided. Also,
In the light guide cable 8, an air supply pipe 42 and a water supply pipe 4 are provided.
4. The suction pipe 46 is extended, the air supply pipe 42 and the water supply pipe 44 are connected to the air / water supply cylinder 12, and the suction pipe 46 is connected to the suction cylinder 14. When the endoscope 2 is used, forceps are inserted from the forceps insertion port 10,
The air / water supply cylinder 12 is provided with an air / water supply switching valve, and the suction cylinder 14 is provided with an open / close valve. At the time of washing, as shown in FIG. A cylinder stopper 50 is attached to the air / water supply cylinder 12 and the suction cylinder 14, and the forceps insertion port 10 and the openings of the cylinders 12, 14 are closed.

As shown in FIG. 2, one-way valves 52 and 54 are provided at the portions where the air supply pipe 42 and the water supply pipe 44 are connected to the air / water supply cylinder 12, respectively. Equivalent). The one-way valve 5
2 and 54 allow the fluid to move in the direction from the connector 36 to the air / water cylinder 12, and flow in the direction from the air / water cylinder 12 to the connector 36, that is, the air pipe. It is configured to prevent movement of fluid in a direction away from the air / water supply cylinder 12 in the water supply pipe 42 and the water supply pipe 44. Therefore, since the one-way valves 52 and 54 are configured as described above, when the endoscope 2 is used for performing an examination or treatment in a body cavity, the air supply and the water supply are performed by operating the air supply / water supply switching valve in the operation unit 4. Is performed in the same manner as in the prior art.

In the endoscope 2 according to the present embodiment, at the time of cleaning, as shown in FIG. 1, the forceps insertion port 10 is closed by a forceps stopper 48, and the air / water cylinder 12 and the suction cylinder 14 are It is closed by the stopper 50. Next, at the end of the light guide cable 8, a cleaning solution or a disinfecting solution is supplied from the end of the suction pipe 46 by a syringe 60 or the like to the suction pipe 4.
6, these liquids are supplied from the suction pipe 46 to the suction cylinder 14, the suction pipe line 22, the junction 24, and the junction pipe 2.
6, through the junction 32 and the junction tube 34, and is discharged from the tip of the insertion portion 6. When these liquids flow, the one-way valves 52 and 54 are provided in a portion where the air supply pipe 42 and the water supply pipe 44 are connected to the air / water supply cylinder 12. The backflow in the 30 direction is prevented, and these liquids are not discharged from the end of the light guide cable 8.
4. The cleaning of the suction line 22 is easily and efficiently performed. In addition, since the backflow from the merging pipe 26 to the merging pipe 30 is prevented, the contaminants in the suction pipe 22 and the suction pipe 46 and the suction cylinder 14 are contaminated by the air supply pipe 18, the water supply pipe 20, and the air supply and water supply. Dirt in the suction pipe 22, the suction cylinder 14, and the suction pipe 46 does not flow backward to the cylinder 12, the air pipe 42, and the water pipe 44.
0, air / water supply cylinder 12, air supply pipe 42, water supply pipe 44
The inconvenience of invading a computer is eliminated.

In the embodiment, the one-way valves 52, 54 are used as a backflow prevention mechanism, and these one-way valves 52, 5 are used.
4 is supplied to the air supply pipe 42 and the water supply pipe 44 by the air supply / water supply cylinder 12.
Although the case where it is arranged in the part connected to is described,
The structure of the backflow prevention mechanism is not limited to the one-way valve, and it may be disposed in each of the air supply pipe 42 and the water supply pipe 44, and the arrangement location is arbitrary.

[0012]

As is clear from the above description, the present invention
An operation unit, an insertion unit, an air / water supply cylinder provided in the operation unit, and a suction cylinder provided in the operation unit,
An air supply pipe and a water supply pipe extending from the air / water supply cylinder to the insertion section in the operation section; a suction pipe extending from the suction cylinder to the insertion section in the operation section; An air supply pipe and a water supply pipe connected to the air supply and water supply cylinder from above, and a suction pipe connected to the suction cylinder from outside the operation unit, wherein the air supply pipe, the water supply pipe and the suction pipe are operated. In the endoscope in which the merging is made into a single merging pipe, and the merging pipe extends through the insertion portion, each of the air supply pipe and the water supply pipe is provided in a direction toward the air / water supply cylinder. A configuration is provided in which a backflow prevention mechanism is provided to enable movement of the fluid and to prevent movement of the fluid in a direction away from the air / water supply cylinder. Therefore, according to the endoscope according to the present invention, at the time of cleaning, the cleaning liquid and the disinfecting liquid do not flow backward and overflow to the hand side, so that the cleaning can be easily performed, and the suction pipe and the suction cylinder can be cleaned. ,
Dirt in the suction pipe does not enter the air pipe or water pipe.

[Brief description of the drawings]

FIG. 1 is a schematic sectional view of an endoscope during cleaning.

FIG. 2 is a sectional view of a one-way valve portion.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 2 Endoscope 4 Operation part 6 Insertion part 8 Light guide cable 12 Cylinder for air supply and water supply 14 Cylinder for suction 18 Air supply line 20 Water supply line 22 Suction line 32 Merge point 34 Merge tube 42 Air tube 44 Water tube 46 Suction Pipe 52, 54 One-way valve

Claims (4)

[Claims] 1. An operation section, an insertion section, an air / water supply cylinder provided in the operation section, a suction cylinder provided in the operation section, and an insertion section side of the air / water supply cylinder in the operation section. An air supply pipe and a water supply pipe extending from the suction cylinder in the operation unit to the insertion unit side, and an air supply pipe connected to the air supply / water supply cylinder from outside the operation unit. And a water supply pipe, and a suction pipe connected to the suction cylinder from the outside of the operation unit, wherein the air supply line, the water supply line, and the suction line are merged into a single junction tube in the operation unit, In the endoscope in which the merging pipe extends in the insertion portion, the air supply pipe and the water supply pipe each can move a fluid in a direction toward the air supply / water supply cylinder, and the air supply / water supply cylinder Move fluid away It provided the backflow prevention mechanism for preventing an endoscope, characterized in that. 2. The endoscope according to claim 1, wherein the backflow prevention mechanism is provided at a portion where an air supply pipe and a water supply pipe are connected to the air / water supply cylinder. 3. The endoscope according to claim 1, wherein a light guide cable is connected to the operation unit, and the air supply pipe, the water supply pipe, and the suction pipe are arranged in the light guide cable. 4. The endoscope according to claim 1, wherein said backflow prevention mechanism comprises a one-way valve.