JPH08238217A - Endoscope - Google Patents

Abstract

PURPOSE: To improve cleaning performance of the inside of an auxiliary injector by providing a valve support part to detachably support a check valve on an auxiliary pipeline in an endoscope which has the auxiliary injector provided with the check valve in the auxiliary pipeline to prevent the back flow of a fluid from the side of a main pipeline. CONSTITUTION: A grip part 71 provided at an operating part of an endoscope is provided with an auxiliary injector 61 to feed air or water to a downstream side water feed pipeline. In other words, the auxiliary injector 61 has a cylindrical connection member 63 inserted into a mounting hole 71b formed in a casing 71a of the grip part 71. Check valves 58 and 59 are provided in an injection port body (auxiliary pipeline) 55 to prevent the back flow of a fluid from the side of the down stream side water feed pipeline. A protruded part (valve support part) 107 is formed inward on the inner circumferential surface of a medium diameter part 55c of the injection port body 55. Then, the check valves 58 and 59 are detachably supported on the protruded part 107.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an endoscope provided with an auxiliary injecting device for injecting a fluid auxiliary into a main duct in the endoscope.

[0002]

2. Description of the Related Art Generally, as one type of endoscope, an auxiliary injecting device for auxiliary feeding of a liquid to a main conduit provided in the endoscope is mounted as disclosed in Japanese Patent Laid-Open No. 63-352226. What has been done is known.

In this auxiliary injection device, an injection port body is attached to, for example, an operation portion of an endoscope. An external device such as a syringe for auxiliary injection is detachably connected to the outer end of the injection port body. Further, one end of an auxiliary pipe is connected to the inner end of the injection port body. The other end of this auxiliary pipe is connected to the main pipe line.

The injection port of the auxiliary injection device is made of an elastic material such as rubber. Further, the inlet body is provided with a check valve for preventing the reverse flow of the fluid from the main pipeline side. This check valve is formed integrally with the inlet body.

When a device such as a syringe for auxiliary injection is not connected to the injection port of the auxiliary injection device, the check valve of the injection port causes the supply fluid on the main conduit side to connect to the connection port of the injection port. Backflow is prevented.

Further, when a device such as an auxiliary injection syringe is connected to the injection port body, the check valve is opened by supplying the injection liquid from the auxiliary injection syringe or the like.
Then, the injection liquid from the auxiliary injection syringe or the like passes through the check valve and is supplied to the main pipeline side through the auxiliary pipe.

[0007]

However, in the above-mentioned conventional structure, the check valve for preventing the reverse flow of the fluid from the main conduit side is integrally formed in the inlet body made of the elastic material such as rubber. Therefore, the internal structure of the auxiliary injection device becomes relatively complicated, and there is a problem that the cleaning work inside the auxiliary injection device is difficult.

Further, since irregularities, gaps and the like are formed around the check valve disposed on the side of the auxiliary pipe, the cleaning liquid can be injected into the pipe of the endoscope or the auxiliary can be assisted. Even when the cleaning liquid is injected from the injection port side of the injection device, there is a problem that the cleaning cannot be sufficiently performed. Therefore, if dirt remains on the irregularities or gaps around the check valve, and if germs propagate there, these germs enter the body through the fluid flowing in the duct of the endoscope and the patient Could be infected with.

The present invention has been made in view of the above circumstances, and an object thereof is to enhance the cleanability of the inside of the auxiliary injection device,
An object of the present invention is to provide an endoscope that can prevent the propagation of miscellaneous bacteria and reliably prevent infection of patients.

[0010]

SUMMARY OF THE INVENTION According to the present invention, an auxiliary conduit for feeding a liquid auxiliary is connected to a main conduit arranged in an endoscope, and a fluid from the main conduit side is connected to the auxiliary conduit. An endoscope having an auxiliary injecting device provided with a check valve for preventing backflow is provided with a valve support portion for detachably supporting the check valve in the auxiliary conduit.

In the present invention, the check valve is detachably supported by the valve support portion of the auxiliary line, and the check valve is removed from the valve support portion during the cleaning work inside the auxiliary injection device, so that the auxiliary injection device is removed. The whole of the inside of the container is washed to the corners so that it is possible to surely prevent the residue from remaining.

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION A first embodiment of the present invention will be described below with reference to FIGS. 2 is an endoscope 1
It shows an overall schematic configuration. The endoscope 1 is provided with an insertion section 2, an operation section 3, and a universal cord 4, respectively.

A connector portion 9 to be connected to a light source device (not shown) is provided at the tip of the universal cord 4. Then, by connecting the connector portion 9 to the light source device, the illumination light is supplied from the light source in the light source device to the incident end surface of the light guide arranged in the endoscope 1.
This light guide is composed of a fiber bundle, transmits the illumination light supplied from the light source device to the incident end surface, and is located on the subject side in front of the emission end surface (not shown) fixed to the distal end surface of the distal end forming portion of the insertion section 2. It is designed to emit illumination light.

Further, an observation window 8 is attached in a watertight state at a substantially central portion of the front end surface of the main body of the front end portion arranged at the front end of the insertion portion 2. Around the observation window 8, the emission end face of the light guide, the opening of the upstream suction pipe line 17a, and the injection nozzle 7 are arranged.

Further, in the insertion portion 2, a downstream side air supply conduit 5a for supplying air and a downstream water supply conduit 6 for supplying water are provided.
a, an upstream suction pipe line 17a for suctioning is provided.

The tip ends of the downstream side water supply conduit 6a and the downstream side air supply conduit 5a merge near the tip of the insertion portion 2 to form one common air supply / water supply conduit. The tip of this air / water feeding conduit is connected to the air / water feeding nozzle 7.
Then, gas or liquid (such as cleaning water) that has been sent or sent through the air / water supply nozzle 7 can be sprayed onto the outer surface of the observation window 8.

Further, the base end side of the upstream suction pipe line 17a is provided in the operating portion main body 3a on the downstream suction pipe line 17b side provided in the universal cord 4 extending from the operating portion 3. They are connected via a suction switching valve 21.

Further, the rear end side of the downstream side air supply conduit 5a and the downstream side water supply conduit 6a are operated to the upstream side air supply conduit 5b and the upstream water supply conduit 6b side which are similarly arranged in the universal cord 4. They are connected to each other via the air / water supply switching valve 22 provided in the main body 3a.

Further, one end of the forceps introduction mouthpiece 19 is connected to a midway portion of the upstream suction pipe line 17a via a Y-shaped pipe line connection tool. The other end of the forceps introduction mouthpiece 19 is connected to a treatment instrument introduction mouth 71a protruding from the grip portion 71 of the operation portion 3 (see FIG. 5).

Further, a forceps plug 20 made of an elastic material is detachably connected to the opening end of the forceps introduction mouthpiece 19. A treatment tool insertion channel 18 is formed by the upstream side portion of the Y-shaped conduit connection tool in the upstream suction conduit 17a and the forceps introduction mouthpiece 19.

Further, an air supply mouthpiece 10, an air supply / water supply mouthpiece 11 and a suction mouthpiece 12 are provided on the connector portion 9 at the tip of the universal cord 4 so as to project therefrom. The air / water supply mouthpiece 11 includes a water supply port 13a and first and second air supply ports 13a.
b and 13c are provided. In this case, the second air supply port 13 c of the air supply / water supply mouthpiece 11 is communicated with the air supply mouthpiece 10.

Further, the water supply port 13a and the first air supply port 13b of the air / water supply mouthpiece 11 are respectively located on the upstream side water supply line 6.
b, it is connected to the upstream side air supply conduit 5b through a smooth curved connecting portion. An external water supply tank 14 side connecting tool 14a is detachably connected to the air / water supply mouthpiece 11.

In addition, the connector portion 9 has an air supply / water supply base 11
Instead of the connection tool 1 on the side of the water tank 14 as shown in FIG.
4a is formed so as to detachably connect the connecting recess 11a, and the connecting recess 14a is fitted with the connecting tool 14a on the side of the water tank 14 to connect the connector 9 and the water tank 14.
You may make it the structure connected with the connection tool 14a of the side. In this case, openings of the water supply port 13a and the first and second air supply ports 13b and 13c are formed on the inner wall surface of the connection recess 11a.

Further, an engaging recess 101 for releasably engaging the connecting tool 14a is provided at the open end of the connecting recess 11a, and an outer peripheral surface of the connecting tool 14a is engaged with a shape corresponding to the engaging recess 101. Each convex portion 102 is formed. Then, with the coupling tool 14a coupled to the coupling recess 11a of the connector section 9, the engagement portion between the engagement projection 102 of the coupling tool 14a and the engagement recess 101 of the connector section 9 provides a retaining effect. I am trying to get it.

Further, the connecting tool 14a is provided with an air supply / water supply cap 11
(Or the connection recess 11a) is provided with a water supply port 103a at a position facing the water supply port 13a, and the first and second air supply ports 13b and 13c of the air supply / water supply mouthpiece 11 (or the connection recess 11a) are formed.
Communication grooves 103b are formed at positions facing each other. The water supply port 103a of the connector 14a is connected to the upper end of the water supply tube 16, and the communication groove 103b is connected to the upper end of the air supply tube 15.

The lower ends of the air supply tube 15 and the water supply tube 16 are connected to the water supply tank 14 side.
In this case, the lower end of the water supply tube 16 is the water supply tank 14
The water tank 14 extends to the vicinity of the inner bottom of the
It is immersed in the washing water inside. Further, the lower end of the air supply tube 15 is fixed to the upper part in the water supply tank 14. The connecting tool 14a is connected to the air / water supply mouthpiece 11 of the connector portion 9 or the connection recess 11a, and air is supplied into the water supply tank 14 via the air supply tube 15, whereby the air in the water supply tank 14 is supplied. Is to be pressurized.

The rear end of the downstream suction pipe 17b is connected to the suction mouthpiece 12. A suction pump (not shown) and a suction tube communicating with a suction bottle are connected to the suction mouthpiece 12.

By connecting the connector part 9 to the light source device, the thin tube-shaped air supply cap 10 projecting from the connector part 9 is connected to an air supply pump (not shown) in the light source device. The air supplied from the air supply pipe 10 is guided to the second air supply port 13c side of the air supply / water supply pipe 11 through the air supply pipe 10.

Therefore, according to this configuration, as shown in FIG.
As shown in (A) and (B), the branch portions (first and second air supply ports 13b and 13c) of the conduit of the connector portion 9 may be provided on the side of the connector 14a outside the endoscope 1. Therefore, it is not necessary to provide a branch portion having poor cleaning performance in the endoscope 1, and the water supply port 13a of the connector part 9 and the first and second air supply ports 13 can be provided.
The cleaning work for inserting the brush 104 into the b and 13c and cleaning can be facilitated.

Further, as shown in FIG. 4 (B), by removing the connecting tool 14a from the air / water supply mouthpiece 11 (or the connection recess 11a) of the connector portion 9, the first and second air supply ports 13b, Since the communication groove 103b on the side of the connector 14a, which is a branched portion of 13c, can also be exposed on the outer surface side, the cleaning work of cleaning by inserting the brush 104 in this portion is also good. Further, by providing the communication groove 103b, which is a branching portion of the first and second air supply ports 13b and 13c, on the water supply tank 14 side, even if the water supply tank 14 is accidentally tilted, the cleaning water will not flow into the air supply pipeline. Mixing can be prevented.

Further, the water supply port 13a and the first air supply port 13b of the air supply / water supply mouthpiece 11 (or the connection recess 11a) have smooth curved shapes on the upstream side water supply line 6b and the upstream side air supply line 5b, respectively. Since the pipes are connected through the connecting portion and the respective pipe lines are individually opened, it is possible to insert the brush 104. In addition, since the air supply tube 15 and the water supply tube 16 in the water supply tank 14 also have a linear conduit, brushing is possible.

Instead of providing the communication groove 103b in the connecting tool 14a, as shown in FIG. 14, the connecting passage 10 for connecting the air supply port 13c and the air supplying tube 15 in the connecting tool 14a.
3c is formed, and a connection passage 103d for connecting the air supply port 13b and the second air supply tube 15a is provided, and the second air supply tube 15a is connected to an air supply pump (not shown). Is also good. In this case, since it is possible to supply air and water by the two-pump system, it is possible to easily add functions such as high-pressure air supply and spray water supply by only the work of replacing the connector 14a.

As shown in FIG. 5, the operation section 3 of the endoscope 1 is provided with an outer case body 82, an operation section lid 81, and a hand-held grip section 71 on the operation section body 3a.

The outer case body 82 has a suction switching valve 21.
Suction button 29, the air / water feed button 44 of the air / water feed switching valve 22, the first operation knob 73 for vertically bending the tip of the insertion portion 2, and the first bending knob for horizontally bending the tip of the insertion portion 2. The second operation knob 74 and the eyepiece 72 are attached.

Further, the universal cord 4 is attached to the operation portion cover 81. Further, the hand-held grip portion 71 is connected to an end portion of the outer case body 82 on the insertion portion 2 side. The grip portion 71 is provided with an auxiliary injection device 61, which will be described later, for supplying air or water in the middle of the downstream water supply pipe line 6a.

The bending operation system of the operation portion main body 3a is shown in FIG.
It has the configuration shown in. Here, the outer case body 82
A mounting hole 83 for a bending operation system is provided in the. Further, a hollow bolt 85 arranged on the outer peripheral surface side of the outer case body 82 is inserted into the mounting hole 83.

The tip of the bolt 85 is screwed to a nut 86 arranged on the inner peripheral surface side of the outer case body 82. In this case, an O-ring mounting groove is formed on the joint surface of the bolt 85 with the outer case body 82. Then, the O-ring 84 fitted in the O-ring mounting groove is pressed against the outer case body 82 by screwing the bolt 85 and the nut 86, so that the watertight state inside the outer case body 82 is secured. ing.

Further, the mounting hole 83 of the outer case body 82
A fixed shaft 87 that penetrates the inside of the central hole of the bolt 85 is provided therein. A pair of inner and outer angle shafts 89a, 89b are rotatably mounted on the outer peripheral surface of the fixed shaft 87, and a pair of sprockets 88a, 88b are rotatably mounted on the inner end side of the fixed shaft 87. Has been done.

In this case, a lower sprocket 88a and an outer angle shaft 8 are provided at the inner end of the inner angle shaft 89a.
The upper sprocket 88b is in contact with the inner end of 9b, and these contact surfaces have a rotation stopping structure.

Further, the second operation knob 74 is provided at the outer end of the inner angle shaft 89a, and the outer angle shaft 89b is provided.
The first operation knobs 73 are respectively provided on the outer ends of the splines 90.
The second operation knob 74 and the first operation knob 73 are supported so as to be movable back and forth along the axial center directions of the angle shafts 89a and 89b, respectively.

Then, as the second operation knob 74 and the first operation knob 73 are rotated, the sprockets 88a, 88a,
Each of the 88b is rotationally driven to push and pull an angle wire (not shown) fixed to the distal end side of the insertion portion 2 through a chain. A guide shaft 91 is also provided between the angle shaft 89b and the bolt 85 to prevent the chain from falling off.

Further, the fixed shaft 8 is attached to the second operation knob 74.
A concave portion 92 is formed on the joint surface side with 7, and the concave portion 9 is formed.
A tapered surface 92a is formed on the inner peripheral surface of the second member 2. Further, the first operation knob 73 has a concave portion 93 formed on the joint surface side with the guide shaft 91, and a tapered surface 93a is formed on the inner peripheral surface of the concave portion 93.

Elastic members 94 and 95 are provided at the portions of the fixed shaft 87 and the guide shaft 91 that face the tapered surfaces 92a and 93a, respectively. Further, between the fixed shaft 87 and the inner angle shaft 89a, the inner angle shaft 89a
And the outer angle shaft 89b, the outer angle shaft 8
9b and the guide shaft 91, the guide shaft 91 and the bolt 85
Sealing members 96, 97, 98, 99 are respectively provided between and. Further, a fall prevention member 100 for the second operation knob 74 is screwed to the outer end of the fixed shaft 87.

When the endoscope 1 is bent, the second operation knob 74 and the first operation knob 73 are pulled up to the outside. As a result, the tapered surface 92a of the second operation knob 74 and the tapered surface 93a of the first operation knob 73.
Is separated from the elastic members 94 and 95, and is in a lightly operable free state.

When the second operating knob 74 and the first operating knob 73 are pushed inward, the second operating knob 7 is pressed.
The tapered surface 92a of No. 4 and the tapered surface 93a of the first operation knob 73 are pressed against the elastic members 94 and 95, and the tapered surfaces 92a of the elastic members 94 and 95 and the second operation knob 74 and the taper of the first operation knob 73 are tapered. Sliding resistance is generated between the surface 93a and the surface 93a, and the engagement state is established.

Therefore, according to this configuration, the engagement amount of each knob 74 or 73 can be adjusted by the amount of depression of the second operation knob 74 and the first operation knob 73, so that each operation knob 74 or 73 can be adjusted. The structure of the engagement mechanism can be simplified, and the cost can be reduced.

Further, the suction switching valve 21 of the operation section 3 is provided with a suction cylinder 24 formed in the operation section body 3a as shown in FIG. A cylinder mouthpiece 26 is screwed and fixed to the edge portion of the opening end of the suction cylinder 24. A suction button unit mounting groove 26a is formed in the cylinder base 26, and the suction button unit 3
0 is detachably attached.

The suction button unit 30 has a suction piston 28 slidably mounted in the suction cylinder 24 of the operation portion main body 3a, a suction button 29 provided on the head of the piston 28, and a suction button mounting rubber 31. Components such as a support member 32 for movably supporting the suction button 29 and a return spring 33 are provided. And
By operating the suction button 29 of the suction switching valve 21, the suction can be switched.

Further, the air / water supply switching valve 22 is provided with an air / water supply cylinder 42 formed in the operation portion main body 3a as shown in FIG. A cylinder mouthpiece 48 is screwed and fixed to the opening edge portion of the air / water feeding cylinder 42. An air / water supply button unit mounting groove 48a is formed in the cylinder base 48, and the air / water supply button unit 45 is detachably mounted.

The air / water supply button unit 45 has an air / water supply piston 43 slidably mounted in an air / water supply cylinder 42 of the operation portion main body 3a, and an air / water supply provided on the head of the piston 43. The button 44, the air / water feed button mounting rubber 46, the support member 47 for movably supporting the air / water feed button 44, the return spring 49, and other components are provided.

By operating the air / water feeding button 44 of the air / water feeding switching valve 22, the air feeding / water feeding operation can be switched. Reference numeral 50 is a leak hole of the air / water supply button 44. Further, the air / water feeding cylinder 42 has a connection port with the upstream water feeding conduit 6b opened at the bottom of the cylinder, so that the washing water is prevented from remaining in the cylinder 42 at the time of washing and removing water. There is.

The auxiliary injection device 61 has the structure shown in FIG. That is, the casing 71 of the grip portion 71
A mounting hole 71b for the auxiliary injection device 61 is formed in a. A substantially cylindrical connecting member 63 of the auxiliary injection device 61 is inserted into the mounting hole 71b. This connecting member 63
A mounting flange 53 that is fixed in the mounting hole 71b is formed on the outer peripheral surface of the. The mounting flange 53 and the connecting member 63 are integrally formed of an electrically insulating material such as plastic.

Further, inside the grip portion 71, an auxiliary injecting container 51, which is provided in the middle of the downstream side water supply conduit 6a, is installed. As shown in FIG. 9, for example, the container 51 is attached and fixed to a support cylinder 52 in the operation portion 3 using a fixing screw or the like.

The container 51 has a first connecting passage 51a connected to the downstream portion 6a ₁ of the downstream water supply pipe 6a,
The second connection passage 51b connected to the upstream portion 6a ₂ of the downstream water supply pipeline 6a and one end of these connection passages 51b
Third connection passages 51c connected to a and 51b are formed respectively.

Further, the third connecting passage 51c of the container 51
The other end is connected to the tip portion of a cylindrical injection port body 55 formed of an elastic material such as rubber.
In this case, the injection port body 55 has a small-diameter portion 55a at the tip portion,
A large diameter portion 55b is formed at the base end portion, and an intermediate diameter portion 55c is formed at an intermediate portion between the small diameter portion 55a and the large diameter portion 55b.

Then, the small diameter portion 55a of the injection port body 55.
Is inserted into a circular hole at the center of the bottom of a support cylinder 56 having a substantially bottomed cylindrical shape disposed inside the connecting member 63. further,
A seal ring 62 is mounted between the inner bottom portion of the support cylinder 56 and the medium diameter portion 55c of the injection port body 55.

A seal member 60 for sealing the joint with the container 51 is fitted on the outer peripheral surface of the support cylinder 56 on the bottom side. Further, an O-ring mounting groove is formed on the outer peripheral surface of the support cylinder 56 at a joint portion with the inner peripheral surface of the connecting member 63, and the O-ring mounted in the O-ring mounting groove is formed.
A watertight seal is provided between the inner peripheral surface of the connecting member 63 and the outer peripheral surface of the support cylinder 56 by 108.

In addition, check valves 58 and 59 are provided inside the injection port body 55 to prevent the reverse flow of the fluid from the side of the downstream water supply pipe 6a which is the main pipe. In this case, the one-way check valve 58 is formed by forming a slit 77 in the center of a flat plate-shaped valve body made of an elastic body. Further, in the other check valve 59, a flat plate-shaped valve body made of an elastic body is provided with a recess 59a to be inserted into the small diameter portion 55a of the injection port body 55, and a slit 78 is formed at the center of the recess 59a. It was done.

In addition, a protrusion (valve support portion) 10 is provided on the inner peripheral surface of the medium diameter portion 55c of the injection port body 55 so as to protrude toward the inside.
7 are formed. The check valves 58 and 59 in the injection port body 55 are detachably supported by the protrusions 107.

Further, a threaded portion 105 for tube connection is formed on the inner peripheral surface of the large-diameter portion 55b of the injection port body 55 on the open end side. A connection screw for connecting a syringe that performs liquid feeding during auxiliary liquid feeding is screwed onto the screw portion 105.

The inlet 55 is pressed together with the support cylinder 56 from above the large diameter portion 55b by a tightening ring 70, and the pressing force keeps the seal member 60 and the seal ring 62 watertight. ing.

The thickness of the sealing member 60 between the upper surface of the container 51 and the support cylinder 56 is determined by the amount of positional deviation between the support cylinder 52 of the operation portion main body 3 and the mounting flange 53 of the connecting member 63 due to the component tolerance. By setting it larger, even if the support cylinder 52 of the operation portion main body 3 moves with respect to the mounting flange 53 of the connection member 63 due to component tolerance, it can be absorbed while ensuring water tightness.

Further, on the outer side of the tightening ring 70 and the engaging member 66 disposed on the outer side of the tightening ring 70, there is an elastic body for insulating the metal portion exposed to the outside of the mounting flange 53 of the connecting member 63. Become an insulating cap
106 is fitted.

Next, a mounting structure for mounting the injection port body 55 and the support cylinder 56 on the connecting member 63 will be described.
Here, as shown in FIGS. 9 (A) and 9 (B), the protrusion 6 for preventing the rotation of the injection port body 55 is provided on the upper end of the connecting member 63.
5 are provided. The protrusion 65 is fitted into an engagement groove (not shown) formed on the injection port body 55 side,
It is designed to prevent the rotation of.

Further, an engaging portion 68 having a diameter larger than the inner diameter of the arm portion 67 provided on the engaging member 66 is formed on the upper end side portion of the connecting member 63. Then, as shown in FIG. 9B, the arm portion 67 of the engaging member 66 is inserted from the side of the connecting member 63 below the engaging portion 68, and the arm portion 67 of the engaging member 66 is inserted into the connecting member 63. The engagement member 66 can be fixed so as not to move in the vertical direction by engaging the engagement member 68 under the engagement portion 68.

Further, the internal thread 6 is formed on the inner surface of the engaging member 66.
9 is engraved. A tightening ring 70 is screwed onto the female screw 69. The tightening ring 70 is formed in two stages having different diameters. In this case, the lower end portion of the tightening ring 70 is formed larger than the diameter of the upper end portion, and the lower surface of the stepped portion abuts the upper end 75 of the connecting member 63.

Further, the upper end portion of the tightening ring 70 is set to be smaller than the wall thickness of the flange 76 provided on the large diameter portion 55b of the injection port body 55, and the engaging member 6 is connected to the connecting member 63.
When 6 is attached and the tightening ring 70 is tightened, it comes into contact with the flange portion 76 thereof.

Then, the assembling work of the auxiliary injection device 61 is performed as follows. First, the engaging member 66 is attached to the connecting member 63 as described above. Subsequently, the support cylinder 56 and the injection port body 55 are sequentially inserted into the connection member 63, and finally the tightening ring 70 is screwed in.

As a result, the tightening ring 70 is connected to the connecting member 6
When it hits the upper end surface 75 of 3 and is further screwed, the engaging member 66 is pulled up. The arm portion 67 of the engaging member 66 hits the flange portion 68 of the connecting member 63, and the engaging portion 66 can be fixed to the connecting member 63 by tightening the flange portion 68 with the arm portion 67 and the tightening ring 70.

Further, the tightening ring 70 is the injection port body 55.
The flange portion 76 of the seal ring 62 is also pressed downward to press the seal member 60 against the upper surface of the container 51, and
Is watertightly sandwiched between the support cylinder 56 and the injection port body 55.

Then, at the time of injecting a fluid into the downstream side water supply conduit 6a by the auxiliary injecting device 61, a connecting screw of an injecting tube (not shown) such as a syringe for feeding the liquid is screwed into the threaded portion 105 for connecting the tube. . In this state, when the fluid is sent from the injecting means, the check valves 58, 5 are caused by the injecting pressure.
The slits 77 and 78 of 9 are expanded, and the downstream side water supply conduit 6
The fluid is injected into a.

Furthermore, the check valve 58 from the inlet 55,
The attachment / detachment work of 59 is performed as follows. First, FIG.
As shown in (A), a detachable jig 79 having a hook portion 80.
Is inserted through the slits 77 and 78 of the check valves 58 and 59. Then, the hook portion 80 is hooked on the inner surface of the lower check valve 59. Then, by pulling out the attachment / detachment jig 79 in this state, the check valves 58 and 59 can be moved over the projection 107 and removed.

The inlet 55 is cleaned as follows. First, as shown in FIG. 10B, the check valves 58 and 59 are removed from the inlet 55, and then the brush 104 is inserted into the inlet 55 and brushing is performed. Then, the water in the water supply device (not shown) rinses the dirt in the injection port body 55 to the outside of the auxiliary injection device 61.

Therefore, in the above-mentioned structure, the check valves 58 and 59 are detachably supported by the projections 107 of the injection port body 55 of the auxiliary injecting device 61, so that the inside of the auxiliary injecting device 61 can be washed. Since the check valves 58 and 59 are removed from the protrusions 107 of the injection port body 55, the entire inside of the auxiliary injection device 61 can be thoroughly cleaned. Therefore, it is possible to reliably prevent the dirt from remaining inside the injection port body 55 of the auxiliary injecting device 61, so that the cleaning property inside the auxiliary injecting device 61 is improved as compared with the conventional case, and the propagation of various germs is prevented to prevent the contamination of the patient. Infection can be reliably prevented.

FIGS. 11A and 11B show a second embodiment of the present invention. This is a modification of the configuration of the auxiliary injection device 61. That is, the auxiliary injection device 61 of this embodiment has a bottomed cylindrical container body.
112 is provided. At the bottom of the container body 112, there is a first connecting passage 112a connected to the downstream portion 6a _{1 of} the downstream water feeding pipeline 6a, and an upstream portion 6a _{2 of the} downstream water feeding pipeline 6a.
Second connection passages 112b are formed to be connected to the respective connection passages 112b.

Further, a female screw portion 112a is formed on the inner peripheral surface of the container body 112. Internal thread of this container body 112
The lower end portion of an injection mouthpiece 113 arranged on the outside of the casing 71a of the grip portion 71 is screwed into the 112a, and the container body is
The container body 112 and the injection mouthpiece 113 are fixed so that the casing 71a is sandwiched between the 112 and the injection mouthpiece 113.

Further, an O-ring mounting groove is formed on the outer peripheral surface side of the opening end of the container body 112, and the O-ring 114 fitted in the O-ring mounting groove is formed on the inner surface of the container body 112 and the casing 71a. The O-ring 114 secures water tightness in the casing 71a.

Further, a threaded portion 116 for connecting a tube is provided on the inner peripheral surface side of the injection mouthpiece 113 so that an injection tube (not shown) can be screwed. This thread 116
A check valve mounting groove 117 is provided under the check valve mounting groove 117, and a check valve 118 made of an elastic material is detachably fitted into the check valve mounting groove 117 so as to prevent the fluid from spouting from the downstream side water supply pipe 6a side. ing. Reference numeral 118a is a slit of the check valve 118. Also,
A cover 12 made of an insulating material is provided on the outside of the inlet metal 113.
3 is installed.

Therefore, in the above-mentioned construction, the check valve 118 is detachably supported by the check valve mounting groove 117 of the injection mouthpiece 113 of the auxiliary injecting device 61, so that the inside of the auxiliary injecting device 61 can be washed. Check valve mounting groove 117 for inlet metal 113
Since the check valve 118 is removed from the inside of the auxiliary injection device 61, the entire inside of the auxiliary injection device 61 can be washed to the corners as in the first embodiment. Therefore, it is possible to reliably prevent the residue of the filth from remaining inside the injection mouthpiece 113 of the auxiliary injecting device 61, so that the cleaning property inside the auxiliary injecting device 61 is improved as compared with the conventional one, and the propagation of various bacteria is prevented to infect the patient. Can be reliably prevented.

In this embodiment, the auxiliary injection device 6
Since 1 is directly assembled to the casing 71a of the grip portion 71, it is not necessary to provide a structure for absorbing the variation in the assembly of the operation portion 3, and the cost can be reduced.

12 and 13 show a third embodiment of the present invention. This is a substantially tubular tube mounting adapter 121 that detachably supports the check valve 119 on the threaded portion 116 in the injection mouthpiece 113 of the second embodiment.
Is screwed on.

On the outer peripheral surface of the outer end portion of the tube mounting adapter 121, there is formed a tube mounting groove 122 for mounting a connecting tube to the auxiliary water injection means, and the tube attached to the auxiliary water injection means (not shown) is attached. It is composed.

Further, inside the tube mounting adapter 121, a concave portion 121b for supporting the check valve 119 is formed on the inner end side. A female screw portion is formed on the inner peripheral surface of the concave portion 121b at the opening end side, and the check valve 119 is detachably supported by the hollow bolt 120 screwed to the female screw portion. .

Therefore, in the case of the above-mentioned construction, the check valve 119 is detachably supported by the tube mounting adapter 121, and the tube mounting adapter 121 is removed from the injection mouthpiece 113 at the time of cleaning the inside of the auxiliary injecting device 61. As a result, the check valve 119 is removed, so that the entire inside of the auxiliary injection device 61 can be washed to the corners as in the second embodiment, and the inside of the injection mouthpiece 113 of the auxiliary injection device 61 can be cleaned. It is possible to surely prevent the remaining of the liquid, and improve the cleaning property of the inside of the auxiliary injecting device 61, prevent the propagation of various bacteria, and surely prevent the infection of the patient.

Further, in this case, since the check valve 119 can be removed from the injection cap 113 by removing the tube mounting adapter 121 from the injection cap 113,
The detachability of the check valve 119 can be further improved.

When the auxiliary water injection device 61 is not used, the tube mounting adapter 121 can be removed from the injection cap 113 and the lid 131 can be attached to the injection cap 113 as shown in FIG.

Furthermore, not only the inside of the container 113 can be cleaned by removing the tube mounting adapter 121 or the lid 131 during the cleaning work, but also a brush can be inserted into the downstream side water supply conduit 6a.

The present invention is not limited to the above embodiment. For example, in each of the above embodiments, the auxiliary injecting device 61 provided in the middle of the downstream water supply conduit 6a in the insertion portion 2 is shown, but the auxiliary conduit shown in the present application is a dedicated conduit for directly cleaning the inside of the body cavity. An injection device 61 may be provided. Furthermore, it goes without saying that various modifications can be made without departing from the scope of the present invention.

[0089]

According to the present invention, since the valve support portion for detachably supporting the check valve for preventing the reverse flow of the fluid from the main conduit side is provided in the auxiliary conduit of the auxiliary injector, the inside of the auxiliary injector is provided. It is possible to improve the cleaning property of the above, prevent the propagation of various bacteria, and reliably prevent the infection of patients.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view showing the configuration of a main part of a first embodiment of the present invention.

FIG. 2 is a schematic configuration diagram of the entire endoscope.

FIG. 3 is a vertical cross-sectional view showing a connected state of a connecting recess of a connector portion of a universal cord and a connecting tool on a water tank side.

FIG. 4 is a vertical cross-sectional view showing the connection recess of the connector part of the universal cord and the connection tool on the water tank side, showing the connection recess of the connector part;
(B) is a vertical cross-sectional view of the water tank.

FIG. 5 is a perspective view of an operation unit.

FIG. 6 is a vertical cross-sectional view showing a schematic configuration of a bending operation section.

FIG. 7 is a vertical cross-sectional view showing a suction switching valve.

FIG. 8 is a vertical sectional view showing an air / water switching valve.

9A and 9B show an auxiliary injecting device, FIG. 9A is a longitudinal sectional view of a main part, and FIG. 9B is a perspective view showing a mounting state of an engaging member.

FIG. 10 is a view for explaining a check valve removal operation,
(A) is a vertical cross-sectional view of the main part showing the insertion state of the detachable jig,
(B) is a longitudinal cross-sectional view of a main portion showing a state where the check valve is removed from the valve support portion.

FIG. 11 shows a second embodiment of the present invention, (A) is a vertical cross-sectional view of an auxiliary injection device, and (B) is (A).
A-A line sectional view.

FIG. 12 is a vertical cross-sectional view of a main part showing a third embodiment of the present invention.

FIG. 13 is a vertical cross-sectional view showing a state in which a lid is attached to the injection mouthpiece of the auxiliary injection device according to the third embodiment.

FIG. 14 is a vertical cross-sectional view showing a modified example of the connected state of the connector part of the universal cord and the connector on the water tank side.

[Explanation of symbols]

 6a Downstream water supply pipe (main pipe) 55 Inlet body (auxiliary pipe) 58, 59 Check valve 61 Auxiliary injection device 107 Protrusion (valve support) 113 Inlet gold (auxiliary pipe) 117 Check valve installed Groove (valve support part) 118, 119 Check valve 121 Tube mounting adapter (valve support part)

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[Procedure amendment]

[Submission date] April 11, 1996

[Procedure Amendment 1]

[Document name to be amended] Statement

[Name of item to be amended] Claims

[Correction method] Change

[Correction content]

[Claims]

[Procedure Amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0008

[Correction method] Change

[Correction content]

Further, when a conventional injection device is attached to the water injection port to inject water into the water supply pipe opening to the tip of the insertion portion, the check valve is formed integrally with the water injection port. There is a problem that a user such as an operator cannot attach or detach the check valve. Also, since the water supply pipe is also bent at a substantially right angle at the connection part between the water injection port and the water supply pipe, when the cleaning brush is inserted into the water supply pipe from the water injection port, the inserted cleaning brush is reversed. There is a problem that the stop valve is caught and brushing of the water supply line cannot be performed. Even if the cleaning brush could pass through the check valve, it could get stuck in the middle of the water supply line and the cleaning brush could not be inserted or removed, and the endoscope had to be repaired. There is a risk that it will not happen.

[Procedure 3]

[Document name to be amended] Statement

[Correction target item name] 0009

[Correction method] Change

[Correction content]

The present invention has been made in view of the above circumstances, and its purpose is to enhance the cleaning property from the water injection port to the inside of the water supply pipe , prevent the propagation of various bacteria, and ensure the infection of the patient. It is to provide an endoscope that can be prevented.

[Procedure amendment 4]

[Document name to be amended] Statement

[Correction target item name] 0010

[Correction method] Change

[Correction content]

[0010]

According to a first aspect of the present invention, a water injection port for attaching an injection device to inject water is provided in a portion outside the insertion portion of the endoscope main body, and in the endoscope main body. In an endoscope in which the water injection port is provided in communication with a water supply pipe line whose distal end is connected to the distal end opening of the insertion part, a cleaning brush can be inserted from the water injection port into the water supply pipe line. The endoscope is characterized in that Further, in the invention of claim 1, at the time of cleaning the inside of the water supply pipe, a cleaning brush can be easily inserted into the water supply pipe from the water injection port to facilitate cleaning from the water injection port to the inside of the water supply pipe. I tried to raise it.

[Procedure Amendment 5]

[Document name to be amended] Statement

[Correction target item name] 0011

[Correction method] Change

[Correction content]

According to a second aspect of the present invention, a water injection port for attaching an injection device to inject water is provided at a portion outside the insertion portion of the endoscope main body, and is disposed inside the endoscope main body, and a tip end portion thereof is provided. Is connected to the water supply conduit connected to the tip opening of the insertion portion, the water injection port is communicated, and a valve for blocking the flow from the tip opening side of the water supply pipe to the water injection port side is In the endoscope provided at the water inlet, a valve receiving portion for detachably attaching the valve to the water inlet is provided, and the valve receiving portion is provided when the valve is removed from the valve inlet of the water inlet. The endoscope is characterized in that a cleaning brush can be inserted into the water supply conduit from the portion. In the invention of claim 2, when the valve is removed from the valve receiving portion of the water injection port, a cleaning brush can be inserted into the water feeding conduit from the valve receiving portion to clean the water feeding conduit. It is designed to enhance the cleaning performance from the water injection port to the inside of the water supply line during work. According to the invention of claim 3, a water injection port for attaching an injection device to perform water injection is provided in a portion outside the insertion portion of the endoscope main body, and is disposed inside the endoscope main body, and the tip portion is inserted into the insertion portion. In the endoscope in which the water injection port is connected to the water supply conduit connected to the tip opening of the section, a detachable lid body is provided on the water injection port, and when the lid body is removed from the water injection port, The endoscope is characterized in that a cleaning brush can be inserted into the water supply line from the water injection port. Further, according to the invention of claim 3, when the lid is removed from the water injection port, a cleaning brush can be inserted from the water injection port into the water supply pipe line so that the cleaning pipe inside the water supply pipe can be supplied from the water injection port. It is designed to enhance the cleanability of the inside of the water pipe.

[Procedure correction 6]

[Document name to be amended] Statement

[Correction target item name] 0089

[Correction method] Change

[Correction content]

[0089]

According to the present invention, from the water injection port to the
It is possible to improve the cleanability of the part, prevent the propagation of various bacteria, and reliably prevent the infection of patients.

[Procedure Amendment 7]

[Document name to be amended] Statement

[Correction target item name] Explanation of code

[Correction method] Change

[Correction content]

[Explanation of Codes] 2 Insertion Part 6a Downstream Water Supply Pipeline 58, 59 Check Valve 61 Auxiliary Injection Device (Water Injection Port) 104 Cleaning Brush

[Procedure Amendment 8]

[Document name to be corrected] Drawing

[Name of item to be corrected] Figure 1

[Correction method] Change

[Correction content]

FIG.

[Procedure Amendment 9]

[Document name to be corrected] Drawing

[Name of item to be corrected] Figure 2

[Correction method] Change

[Correction content]

[Fig. 2]

[Procedure Amendment 10]

[Document name to be corrected] Drawing

[Name of item to be corrected] Fig. 4

[Correction method] Change

[Correction content]

[Figure 4]

Claims (1)

[Claims] 1. A check valve which is connected to an auxiliary pipe for auxiliary feeding of a liquid to a main pipe arranged in an endoscope and which prevents a reverse flow of fluid from the main pipe side in the auxiliary pipe. An endoscope having an auxiliary injection device provided with the above-mentioned, wherein a valve support portion that detachably supports the check valve is provided in the auxiliary conduit.