JP3267399B2 - Endoscope with check valve - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an endoscope, and more particularly to a valve structure of a device provided with a check valve for preventing air, liquid and the like from flowing backward from a distal end portion.

[0002]

2. Description of the Related Art An endoscope has a structure capable of supplying air or water to a distal end portion inserted into a body to be observed, whereby water (physiological saline) or air for cleaning an observation window is provided. And water for washing the affected area or the like can be supplied to the object to be observed.

FIG. 7 shows a schematic configuration of air supply or water supply in a conventional endoscope (electronic endoscope) device. An endoscope 1 as a scope includes a distal end portion 2 (curved portion), A light source unit 5 is connected to the endoscope 1 via a cable 4. In the endoscope 1 and the cable 4, respective pipes are arranged as shown in the drawing from the water tank 6, the air pump 7, and the suction connector 8 to the distal end portion 2. A water supply operation valve 9 and a suction operation valve 10 are attached.

A first connector 11 and a second connector 12 to which an injector such as a syringe is connected are provided on the distal end side of the operation unit 3.
The first connector 11 is connected to water pipes 100 and 101 in the endoscope 1, and the second connector 12 is independently connected to a water pipe 110 for supplying the affected part with cleaning water to the distal end 2. You. The check valve 14 is connected to the water pipe 100 connected to the first connector 11 and the check valve 15 is connected to the water pipe 110 connected to the second connector 12.
0 is provided with a check valve 16.

[0005] According to the above configuration, the upper opening of the air / water supply operation valve 9 is closed with a finger, so that the air pump 7
Is supplied to the observation window of the distal end portion 2 through the air supply pipe 120. At this time, backflow of air, liquid, and the like from the distal end portion 2 is prevented by the backflow prevention valve 16. When the air / water supply operation valve 9 is pushed downward, the air supply pipe 120 is closed and the water supply pipe 101 is opened, so that the water supplied from the water tank 6 passes through the water supply pipe 101 to the front end. It is supplied to the section 2.

Further, water can be supplied to the distal end portion 2 from the injector connected to the first connector 11 at a different pressure from the above case. Also in this case, the backflow prevention valve 14 prevents backflow of liquid or the like from the distal end portion 2 to the connector 11. In addition, the affected part cleaning water can be supplied to the distal end portion 2 from the second connector 12 by the injector, and the affected part cleaning water is discharged straight from the distal end portion 2 toward the object to be observed. In this case, the backflow of the liquid or the like is prevented by the check valve 15.

[0007]

However, the above-mentioned conventional endoscope has a problem that it is difficult to wash and disinfect the check valves 14 to 16 and the tubes in the vicinity thereof. That is, it has been found that the check valves 14 to 16 and the pipes near the check valves are contaminated by the liquid flowing back or by continuous use, and cleaning and disinfection of the check valves 14 to 16 are required. However, as shown in FIG. 7, the check valves 14 to 16 are disposed in the endoscope 1 in the middle of the pipe, and a brush for cleaning is inserted from the air / water supply operation valve 9 side. Since it is not possible to open the tip or the first connector 1
Must be inserted from the first and second connectors 12 side,
Cleaning and disinfection had become difficult.

[0008] An elongated brush is used for cleaning a pipe, but care must be taken to make the brush insertable and easy.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and has as its object to provide an endoscope in which a check valve and a check valve capable of easily cleaning the inside of a pipe are provided while brushing is possible. To provide a mirror.

[0010]

In order to achieve the above object, an endoscope provided with a check valve according to the present invention is provided with an air supply or water supply to a distal end from a predetermined supply source. In an endoscope provided with a pipe and an operation valve, a valve unit incorporating a check valve is provided on an outer surface of the endoscope between the operation valve for supplying air or water and the distal end, and the valve unit is provided with the valve unit. The upper part is a lid that can be removed from the valve part, and a supply pipe bent at a predetermined curvature is connected to the lower part of the valve part.

[0011]

According to the above construction, the lid is connected to the main body of the valve in the form of, for example, a female screw. When the lid is removed, the inside of the valve is exposed. Therefore,
It is easy to clean and disinfect the check ring and valve. At the same time, the supply pipe is formed with a predetermined curvature,
Cleaning and disinfection are performed efficiently using a brush.

[0012]

1 to 5 show a configuration of a valve portion of an endoscope in which a check valve according to an embodiment is arranged, and FIG. 6 shows an entire endoscope. The configuration will be described first. 7, the endoscope 18 has a distal end portion 2 and an operation unit 3 as in the case of FIG. 7, and the light source unit 5 is connected to the endoscope 18 via the cable 4. And this endoscope 18
Are provided with respective supply pipes from a water tank 6, an air pump 7 in the light source unit 5, and a suction connector 8 as shown in the figure, and an air supply / water supply operation valve 9, a suction operation The valve 10 is attached. FIG. 19 shows a forceps inlet for inserting forceps or the like.

A connector / valve portion 20, 2 having a check valve incorporated therein is provided at the distal end of the operation portion 3 in the endoscope 18.
1 and a valve section 22 which does not double as a connector are arranged. The connector and valve section 20 is used for water supply, the connector and valve section 21 is used for cleaning affected area, and the valve section 22 is used for air supply.

FIGS. 1 and 2 show the detailed structure of the connector / valve unit 20 for water supply. The connector / valve unit 20 is fixed to the outer plate 24 of the endoscope 18. A lid 27 having a rotating ring 26 is detachably attached to a substantially hemispherical base 25 having a relatively large radius. The rotating ring 26, as shown in FIG.
5 is connected in the form of a female screw and a male screw, and a connecting portion 28 for connecting an injector such as a syringe is formed at the center of the lid 27. A check valve 30 for preventing back flow to the outside of the connector is disposed in a flow path communicating with the flow path 29 of the connecting portion 28.

An intermediate member 32 is attached to the lid 27 by screws or the like. In the intermediate member 32, a check valve 33 is disposed below the intermediate member 32, and a flow path 34,
A flow path 35 and the like are formed. Each member is kept airtight by an O-ring as shown. Therefore, in the embodiment, the cover 27 can be removed while rotating the rotation ring 26 while holding the check valves 30 and 33, whereby the base 25 is in the state shown in FIG.
With the configuration in which the upper surface of the valve section 20 is opened to the maximum, the inside is completely exposed.

A water supply pipe 101 connected to the air / water supply operation valve 9 is connected to the bottom of the base 25, and a water supply pipe 102 formed up to the endoscope tip 2 on the side slope S. Is connected. These water pipes 101 and 102
As shown in FIG. 2, the vicinity of the connection portion is bent at a gentle curvature so that the brush 36 can be easily inserted to the back. Further, in the embodiment, the bottom end C is formed into a curved surface so that the bottom can be easily cleaned.

FIG. 3 shows the structure of the check valves 30 and 33. In this embodiment, the check valves 30 and 33 are made of an elastic member such as rubber, and are connected to an outer ring 38 so that the inner valve 37 can move in the axial direction.

According to the connector / valve section 20, the water that has passed through the water supply pipe 101 by operating the air / water supply operation valve 9 passes through the check valve 33 and is sent through the flow paths 34 and 35. It flows to the water pipe 102. At this time, the upper backflow prevention valve 30 is closed, and backflow to the outside is prevented.
On the other hand, when an injector is connected to the connecting portion 28, the injected water passes through the check valve 30 and likewise the flow path 34,
It flows to the water pipe 102 via 35. At this time, the lower backflow prevention valve 33 is closed, and backflow to the air / water supply operation valve 9 is prevented. In this way, the supplied water is jetted toward the observation window of the endoscope distal end portion 2.
Furthermore, when this water supply is not performed, both check valves 3
By 0 and 33, the liquid or the like in the body to be observed is prevented from flowing back to each part through the water pipe 102.

In such a connector / valve section 20, by turning the rotary ring 26 of FIG.
The lid 27 is removed while holding 0 and 33. Then, if the intermediate member 32 is separated from the lid 27, the cleaning and disinfection of the check valves 30 and 33 can be easily performed. Also,
As shown in FIG. 2, the brush 36 can be easily inserted into the water supply pipes 101 and 102 from a wide opening of the base 25, and since the water supply pipes 101 and 102 are bent at a predetermined curvature, the brushes 36 are formed. There is an advantage that the 36 can be easily inserted to the back. That is, in the washing of the tube,
It is difficult to insert the brush 36 from the air supply / water supply operation valve 9 side, and the brush 36 can be inserted from the valve portion 20 to the back so that the supply pipes 101 and 102 can be inserted.
Can be cleaned and disinfected. Further, the inside of the base body 25 can be easily cleaned and disinfected by a wide opening or a curved surface finish of the bottom end portion C.

FIGS. 4 and 5 show the detailed structure of the connector / valve portion 21 for the affected part cleaning water. As shown in FIG. 41
Is covered. The cover 41 is provided with a rotating ring 42 that is connected to the base 40 in the form of a female screw and a male screw. At the center of the cover 41, a connecting portion 43 that connects an injector is formed. The check valve 45 shown in FIG. 3 is disposed in a flow path communicating with the flow path 44 of the connecting portion 43. Then, a water pipe 110 disposed toward the endoscope distal end portion 2 is connected to the slope portion S on the bottom side surface of the base 40,
The water pipe 110 is bent at a predetermined curvature near the connection portion. The bottom end C of the base 40 is formed as a curved surface.

Connector / valve portion 21 for washing water for the affected part
According to the connection of the injector to the coupling portion 43,
Wash water is sent from the water pipe 110 to the tip 2 through the check valve 45. Therefore, the affected-part washing water is jetted straight from the distal end portion 2 toward the object to be observed, whereby various treatments are performed. 45 prevents it.

Then, as described above, the lid 41 is removed by turning the rotary ring 42, and in this state, the backflow prevention valve 45 can be easily cleaned and disinfected. Further, as shown in FIG. 5, the brush 36 can be easily inserted into the water pipe 110 from the wide opening of the base 40, and the water pipe 11
0 can be easily cleaned and disinfected.

Further, the valve portion 22 which is not the connector type for air supply described with reference to FIG. 6 may be configured to have a flat lid. That is, in the configuration of FIG. 1, the upper check valve 30 may be omitted, the lower check valve 33 only may be left, and the coupling portion 28 may be removed to close the upper portion of the lid 27. According to this, air can be sent from the air / water supply operation valve 9 side to the distal end portion 2 side, and at the same time, backflow of air and the like from the distal end portion 2 side can be prevented.

In the above embodiment, the lids 27 and 41 can be removed from the valve portions 20, 21 and 22 so that
In addition to facilitating cleaning and disinfection of the inside of the valve, the water pipe 10
Since the first, second, and 110 are bent at a predetermined curvature, there is an advantage that the brush 36 can be easily inserted into the tube, and the inside of the tube can be easily cleaned and disinfected.

[0025]

As described above, according to the present invention,
A valve unit incorporating a check valve is provided on the outer surface of the endoscope between the operation valve for air supply or water supply and the distal end, and the upper part of the valve unit is a lid detachable from the valve unit. A supply pipe bent at a predetermined curvature is connected to the lower part, so that the inside of the valve and the check valve can be easily cleaned and disinfected, and a brush can be easily inserted into the supply pipe, so that the entire pipe is cleaned. , Disinfection becomes easily feasible.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing a configuration of a connector / valve section of an endoscope in which a check ring according to an embodiment of the present invention is disposed.

FIG. 2 is a view showing a state where a lid is removed from the connector / valve section of FIG. 1;

FIG. 3 is a view showing a configuration of a check valve according to the embodiment.

FIG. 4 is a cross-sectional view showing a configuration of a connector / valve section provided with one check valve in the embodiment.

FIG. 5 is a view showing a state where a lid is removed from the connector / valve section of FIG. 4;

FIG. 6 is an overall view illustrating a configuration of an endoscope according to an embodiment.

FIG. 7 is an overall view showing a configuration of a conventional endoscope.

[Explanation of symbols]

 1, 18 endoscope, 2 distal end, 3 operating section, 9 air / water supply operating valve, 20, 21 connector / valve section, 22 valve section, 25, 40 base, 27, 41 ... lid, 30, 33, 45 ... check valve, 36 ... brush, 100, 101, 102, 110 ... water pipe, 120 ... air pipe.

──────────────────────────────────────────────────続 き Continued on the front page (58) Fields surveyed (Int. Cl. ⁷ , DB name) A61B 1/00-1/32

Claims (1)

(57) [Claims] An endoscope provided with a supply pipe and an operation valve for supplying air or water from a predetermined supply source to a distal end of the endoscope. A valve unit incorporating a check valve is provided on the outer surface of the endoscope, and the upper portion of the valve unit is a lid that can be removed from the valve unit, and the lower part of the valve unit is formed with a predetermined curvature. An endoscope provided with a check valve, wherein a supply pipe is connected.