JP2000237126A - Passage structure for endoscope - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily wash an air feed pipe without requiring a dedicated check valve by dividing the air feed pipe of an endoscope into a local operation section side air feed pipe and a tip side air feed pipe, and connecting the local operation section side air feed pipe and the tip side air feed pipe with a removable trap member from the outside of the endoscope. SOLUTION: The air feed pipe 58 of this endoscope 10 is divided into a local operation section side air feed pipe 58A and a tip side air feed pipe 58B. The local operation section side air feed pipe 58A and the tip side air feed pipe 58B are connected by a cap 102 which is a removable trap member from the outside of the endoscope 10. When the air feed pipe 58 is to be washed, the cap 102 is removed from a joint member to expose the upper end opening section 96A of a through hole 96 and the upper end opening section 100A of a through hole. A chemical is injected from the upper end opening sections 96A, 100A, and a brush is inserted to wash the air feed pipe 58.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a pipe structure of an endoscope, and more particularly to a pipe structure of an endoscope provided with a plurality of pipes such as an air / water pipe and a suction pipe.

[0002]

2. Description of the Related Art A medical endoscope has an air / water supply valve attached to a hand operation unit, and operates an air / water supply valve operation button with a finger of an operator, thereby allowing air and water to be exchanged. Is switched and supplied into the body cavity.
Such an endoscope includes an air pipe that guides air to the distal end of the insertion section,
A water pipe for guiding water to the distal end of the insertion section is provided from the hand operation section to the distal end of the insertion section, and one end of the air pipe and the water pipe is connected to a cylinder of an air / water valve, and the other end is connected to the distal end of the insertion section. Is connected to the opening formed in the opening.

[0003] The method of cleaning the air supply pipe and the water supply pipe includes an air supply pipe and a water supply pipe.
The operation is performed by removing the operation button and the piston of the water supply valve from the cylinder, injecting a drug solution with a syringe from one end opening of the air supply pipe and one end of the water supply pipe, and inserting a brush.

[0004]

However, the conventional method of cleaning a pipeline in an endoscope is performed by injecting a chemical solution or inserting a brush from one end opening of the pipeline. When the length of the pipe becomes long, there is a problem that it is difficult to clean the entire length of the pipeline. In addition, the conventional endoscope is provided with a check valve in the air supply pipe, and the check valve prevents liquid in the body cavity from leaking from the air supply / water supply valve through the air supply pipe. I have. Therefore, the conventional endoscope has a drawback in that it is difficult to clean the air supply pipe because the check valve interferes with cleaning the air supply pipe.

[0005] The present invention has been made in view of such circumstances, and it is easy to clean a pipeline, and an endoscope capable of exhibiting the function of a check valve even if a dedicated check valve is removed. An object of the present invention is to provide a mirror pipe structure.

[0006]

According to the present invention, in order to achieve the above object, one end of the endoscope is connected to a valve cylinder provided in a hand operation section of the endoscope, and the other end of the valve cylinder is connected to the endoscope. In an endoscope having a conduit connected to an opening formed at the distal end of the insertion portion, the conduit is connected to a hand-operating unit side conduit via a trap member detachable from the outside of the endoscope. It is characterized by being divided into a front end side pipeline.

According to the present invention, the pipeline is divided into a hand-operated portion side pipeline and a distal-side pipeline at a predetermined position, and the hand-operated portion side pipeline and the distal-side pipeline are connected to an endoscope. Are connected by a trap member that can be detached from the outside, so that when cleaning the pipeline, the trap member may be removed from the pipeline. Thus, even a pipe having a long pipe length can be washed separately by the hand-operated-portion-side pipe and the distal-end-side pipe, so that the pipe can be easily cleaned. Further, since the trap member also functions as a check valve, a dedicated check valve is not required in the pipeline. This makes it easier to clean the pipeline.

[0008]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of an endoscope according to the present invention;
FIG. 1 is an overall view showing an external appearance of an endoscope 10 used for medical treatment, and FIG. 2 is a pipeline schematically showing a plurality of pipelines arranged in the endoscope 10 of FIG. It is a block diagram.

An endoscope 10 shown in FIG. 1 has a hand operation unit 12, and a distal joint 14 of the hand operation unit 12 has
An insertion portion 16 to be inserted into a body cavity is connected. The insertion portion 16 includes a flexible portion 18, a curved portion 20, and a hard distal end portion 2.
2, the bending portion 20 includes a flexible portion 18
It is connected to a pair of angle operation knobs 24 provided on the hand operation unit 12 via a pair of angle operation wires (not shown) inserted therein. Therefore, when the angle operation knobs 24, 24 are operated by the operator, the bending portion 20 is bent, and the distal end hard portion 22 is directed in a desired direction. Reference numeral 26 denotes a forceps hole, through which a treatment tool such as forceps is inserted into the insertion section 16.

As shown in FIG. 2, an air supply / water supply port (corresponding to an opening formed at the distal end of the insertion portion) 28 and a forceps channel 30 are formed on the end surface of the distal end hard portion 22. In addition, the air supply / water supply port 28 and the forceps channel 3
An objective lens, an illumination lens, and the like (not shown) are provided adjacent to 0. The image formed by the objective lens is guided to an eyepiece 32 (see FIG. 1) of the hand operation unit 12 via an image guide (not shown), and is observed from the eyepiece 32.

A light guide (not shown) is provided behind the illumination lens. The light guide is inserted into the bending portion 20, the flexible portion 18, the hand operation portion 12, and the flexible cable 34, and is connected to a light guide rod 38 of a light guide connector 36 connected to the flexible cable 34. The light guide connector 36
The light source device 8 shown in FIG.
Connected to 0. At this time, the light guide rod 38
The light source unit 80 is connected to a light source unit (not shown), so that light from the light source unit is emitted from the illumination lens toward the affected part via the light guide rod 38 and the light guide.

The hand operating section 12 is provided with an air / water supply valve 40. In addition, this air supply
A suction valve 42 and a shutter button 44 are provided adjacent to the water supply valve 40. The air / water supply valve 40 includes a cylinder (corresponding to a valve cylinder) 46, a piston 48, and an operation button 50 as shown in FIG. The cylinder 46 is connected to the distal end of each of an air supply pipe 52 and a water supply pipe 54. The air supply pipe 52 is disposed on the light guide connector 36 via the flexible cable 34, and a connection end 52 </ b> A protrudes from the light guide connector 36. The connection end 52A
When the light guide connector 36 is connected to the light source device 80, the compressor 82 built in the light source device 80
Connected to. Thereby, the air from the compressor 82 is supplied to the cylinder 46 via the air supply pipe 52.

The air supply pipe 52 is connected to a branch pipe 56 in the light guide connector 36. This branch pipe 56
The connection end 56 </ b> A protrudes from the light guide connector 36 and is connected to a water supply tank 86 via an air supply tube 84. The water supply tank 86 has a water supply tube 8.
The water supply tube 88 is connected to a connection end 54A of the water supply pipe 54 protruding from the light guide connector 36. Therefore, when the piston 48 is pressed down in a state where the air leak hole 51 of the air / water supply valve 40 is closed, the air from the compressor 82 flows to the branch pipe 56 and the air supply tube 84.
Through the water supply tank 86. This allows
The internal pressure in the water supply tank 86 increases, and the water in the water supply tank 86 is supplied to the water supply pipe 5 through the water supply tube 88 by this pressure.
4 and is supplied to the cylinder 46.

The air supplied to the cylinder 46 is supplied to the air supply pipe 58 by closing the air leak hole 51 of the operation button 50 with the operator's finger. On the other hand, cylinder 46
Is supplied to the water pipe 60 by depressing the piston 48 with the air leak hole 51 closed. The proximal end of each of the air supply pipe 58 and the water supply pipe 60 is connected to a predetermined position of the cylinder 46, and the distal end of each of the air supply pipe 58 and the water supply pipe 60 It is connected to the air supply / water supply pipe 62 of the book. The air / water pipe 62 is inserted through the insertion section 16 and connected to the air / water port 28 formed in the distal end hard portion 22.

On the other hand, the suction valve 42 includes a cylinder 66,
It is composed of a piston 68 and an operation button 70. The distal end of a connecting pipe 72 is connected to the cylinder 66. The connection pipe 72 is disposed on the light guide connector 36 via the flexible cable 34, and a connection end 72 A thereof protrudes from the light guide connector 36. The connection end 72A is connected to a suction pump (not shown).

A suction tube 74 is provided in the cylinder 66.
The suction tube 74 is inserted through the insertion portion 16, and the forceps channel 30 formed in the distal end hard portion 22.
It is connected to the. Therefore, when the piston 68 is pressed down by the operation button 70 of the suction valve 42 to make the connection pipe 72 and the suction pipe 74 communicate with each other through the cylinder 66, the liquid in the body cavity is sucked from the forceps channel 30 to the suction pipe 74. Then, it is discharged outside through the connecting pipe 72. Note that the forceps hole 26 is connected to the suction tube 74 in the hand operation unit 12. That is, the suction tube 74
Is also used as a treatment instrument insertion tube such as forceps.

By the way, the air supply pipe 58 shown in FIG.
A trap 90 is provided. The trap 90 will be described. First, the trap 90 may be provided between the air supply / water supply valve 40 and the air supply / water supply pipe 62. It shall be provided at the tip side position. In this position, the air supply pipe 58 is provided with the hand-operated operation section-side air supply pipe 58A and the distal end-side air supply pipe 5.
8B. The hand operation unit side air supply pipe 5
8A has a rear end connected to the cylinder 46 and a front end connected to a joint member 94 via an elbow tube 92 shown in FIGS.

As shown in FIG. 4, the joint member 94 is fastened to the operation unit 12 via an O-ring 96,
The upper end is arranged to protrude upward from the hand operation unit 12 by a predetermined amount. In the joint member 94, a through-hole 96 communicating with the elbow tube 92 is formed upward, and an upper end opening 96A of the through-hole 96 is open.

As shown in FIG. 2, the distal end side air supply pipe 58B has a distal end connected to the air supply / water supply port 28 and a rear end provided through the elbow pipe 98 shown in FIGS. It is connected to a joint member 94. The joint member 94 has a through hole 1 communicating with the elbow tube 98.
00 is formed upward, and the upper end opening 100A of the through hole 100 is open.

A cap 102 serving as a trap member is attached to the joint member 94 from the outside of the hand operation unit 12. The cap 102 has a ridge 103 formed on the inner periphery of the lower portion, and the ridge 103 is elastically fitted to a recess 95 formed on the outer periphery of the joint member 94. As a result, the cap 102 is attached to the joint member 94 from the outside of the hand operation unit 12 by a touch, and is easily removed.

A cap 102 is attached to the joint member 94.
Is fitted, a trap space 104 is formed between the joint member 94 and the cap 102 in an airtight state. As a result, the air sent from the hand-operated-portion-side air supply pipe 58A flows into the trap space 104 through the through hole 96 of the joint member 94 without leaking from the trap 90, and then passes through the through hole 100 of the joint member 94. Flows to the distal air supply pipe 58B, and
It is sent to the air supply / water supply port 28.

Further, as shown in FIG.
The upper surface 101 of the joint member 94 where the upper end opening 100A of the through hole 96 is opened is formed at a position higher than the upper surface 97 where the upper end opening 96A of the through hole 96 is opened. As a result, the liquid that has flowed back from the distal-side air supply pipe 58B does not flow into the hand-operating-section-side air supply pipe 58A, but accumulates at the bottom 105 of the trap space 104. That is,
The trap 90 has a check valve function. Further, the liquid accumulated in the bottom portion 105 can be discharged to the outside by removing the cap 102.

Next, a description will be given of a cleaning method for cleaning the air supply pipe 58 in the endoscope 10 configured as described above. First, the cap 102 is removed from the joint member 94, and the upper end opening 96A of the through hole 96 and the upper end opening 100A of the through hole 100 are exposed to the outside. Then, from the upper end opening 96A, the hand-operated-portion-side air supply pipe 5
A chemical solution is injected into 8A and a brush is inserted to clean the entire length of the hand-operated-portion-side air supply pipe 58A. And
A chemical solution is injected from the upper end opening 100A into the distal air supply pipe 58B and a brush is inserted to clean the entire length of the distal air supply pipe 58B. Thus, the cleaning of the air supply pipe 58 is completed.

Therefore, in this embodiment, the air supply pipe 5
Even if the length of the pipe 8 is long, the cleaning can be performed separately for the hand-operated-portion-side air supply pipe 58A and the distal-end-side air supply pipe 58B. Can be washed. The cap 102
Exerts the function of a check valve, so that the air supply pipe 58 does not require a dedicated check valve. Thereby, cleaning of the air supply pipe 58 is further facilitated.

Further, in this embodiment, the trap 90 functions as a check valve, but since the trap 90 does not adversely affect the pressure loss unlike an actual check valve, a sufficient amount of air is supplied. can do. In the present embodiment,
Although the example in which the trap 90 is provided in the air supply pipe 58 has been described, the trap 90 may be provided in the water supply pipe 60 and the suction pipe 74. This facilitates cleaning of the water pipe 60 and the suction pipe 74.

In the present embodiment, the trap 90 is provided at one position in the entire length of the air supply pipe 58.
Two or more locations may be provided depending on the length of the eight. Further, it is preferable that the shape of the joint member 94 and the cap 102 be devised so that the liquid accumulated in the trap space 104 does not leak from the cap 102 and the joint member 94 when the cap 102 is removed.

The upper end opening 9 of the joint member 94
6A, 100A, so that the brush can be smoothly inserted into the hand-operated-portion-side air pipe 58A and the distal-side air pipe 58B.
It is preferable that the through holes 96 and 100 are formed to be inclined.

[0028]

As described above, according to the pipe structure of the endoscope according to the present invention, the pipe is divided into a pipe at the predetermined position and a pipe at the distal end at a predetermined position. The conduit and the distal conduit are connected by a trap member that is removable from the outside of the endoscope, so even if the conduit is long, it can be divided into a hand-operated part conduit and a distal conduit. Can be washed. This facilitates cleaning of the pipeline. In addition, since the trap member also functions as a check valve, a dedicated check valve is not required in the pipe, and thus the pipe can be more easily cleaned.

[Brief description of the drawings]

FIG. 1 is an overall configuration diagram of an endoscope to which a pipe structure according to an embodiment is applied.

FIG. 2 is a schematic diagram of a pipeline configuration schematically showing a pipeline provided in the endoscope of FIG. 1;

FIG. 3 is an assembled perspective view of a trap provided in a hand operation unit of the endoscope.

FIG. 4 is a cross-sectional view of a trap provided in a hand operation unit of the endoscope.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 10 ... Endoscope, 12 ... Hand operation part, 58 ... Air supply pipe, 58
A: Hand-operated-portion-side air supply pipe, 58B: Tip-side air supply pipe, 60
... water pipe, 62 ... air / water pipe, 90 ... trap, 94
... joint member, 102 ... cap, 104 ... trap space

Continued on the front page (72) Inventor Mitsuo Kondo 1-3324 Uetake-cho, Omiya-shi, Saitama F-term in Fuji Photo Optical Co., Ltd. (Reference) 2H040 DA21 DA57 4C061 AA00 BB00 CC00 DD03 FF42 GG08 JJ06 JJ11

Claims (1)

[Claims] 1. A conduit having one end connected to a valve cylinder provided in a hand operation section of an endoscope and the other end connected to an opening formed at a tip of an insertion section of the endoscope. Wherein the conduit is divided into a hand-operated-portion-side conduit and a distal-end conduit via a trap member detachable from the outside of the endoscope. Endoscope pipe structure.