JPH06304130A - Valve device for endoscope - Google Patents

Abstract

PURPOSE:To determinately prescribe a position of a valve operation control ring, and to always secure stable sealability whose fluctuation scarcely occurs by selecting alternatively an engaged position of an engaging pin and a cam groove to a first engaged position and a second engaged position. CONSTITUTION:In an operating part of an electronic endoscope, a valve device 1 is attached to a treating implement-inserting port placed in one side part thereof so as to be freely attachable and detachable by a tightening operation of a fixed ring 37, and the treating implement can be inserted in a seal state through this valve device 1. This valve device 1 has an inner cylinder 2 having a treating implement insert-through hole 18, and is provided with a valve member 16 made of an elastic material in its upper end part, and also, provided with an outer cylinder 4 on which a clogging plug body 10 being a valve operation control ring being slidable and freely turnable against the inner cylinder 2 is crowned. In this outer cylinder 4, a cam groove 24 is formed, and an engaging pin 22 formed projectingly in the inner cylinder is detained therein, by which sliding and turning operations of the outer cylinder 4 to the inner cylinder 2 are controlled.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an endoscope valve device capable of sealingly inserting a treatment instrument into a treatment instrument insertion channel while closing the insertion side opening of the treatment instrument insertion channel of an endoscope. Regarding

[0002]

2. Description of the Related Art When performing medical treatment using an endoscope,
In general, the work of introducing a medical fluid or physiological saline for securing a visual field into the patient's body, or introducing a treatment tool used for excising a lesion site or collecting biological tissue into the body, It is performed through the treatment instrument insertion channel of the endoscope.

During such a treatment operation, the inside of the body and the outside of the living body communicate with each other through the treatment instrument insertion channel, so that due to changes in the pressure inside the body, dirt and air in the body pass through the treatment instrument insertion channel. May leak out of the body.

Therefore, conventionally, a plug member for closing or a valve member for opening and closing the treatment instrument insertion channel is provided at the insertion side opening of the treatment instrument insertion channel to dispose of waste in the body cavity. This prevents air and air from leaking out of the body.

FIG. 7 shows a conventional example of the forceps plug. The forceps plug 100 shown in the drawing is a tubular member that is attached to the insertion-side opening of the treatment-tool insertion channel of the endoscope, and communicates with the treatment-tool insertion channel when attached to the insertion-side opening. It has a tool insertion hole 105.

Further, the outermost outer plug portion 102 for closing the treatment instrument insertion hole 105 to the outside is formed of an elastic material, and the normally closed slit 10 is formed substantially in the center thereof.
3 is formed.

Further, the inner plug portion 106 disposed inside the outer plug portion 102 is provided with a small hole 104 through which the treatment instrument inserted through the slit 103 can be inserted into the treatment instrument insertion hole 105 in a sealed state. ing.

In the configuration shown in the figure, a saline solution, a medical fluid, or the like is inserted through the treatment instrument insertion hole 105 by connecting a drip set, a syringe, or the like to the mouthpiece 107 connected to the side wall of the forceps plug 100. It is possible to deliver the liquid into the general channel.

Although not shown in FIG. 7, the valve member is a ring-shaped elastic body having a hollow hole through which a treatment tool can be inserted, and serves as a valve mechanism for opening and closing the treatment tool insertion hole 105. It is provided, for example, on the upper end side of the hole 105.
Then, when the treatment tool is inserted into the treatment tool insertion hole 105 through the hollow hole of the valve member, if the tightening ring attached to the valve member is rotated to be tightened, the valve member is locked by the tightening ring. The hollow hole through which the treatment tool is crushed is reduced in diameter, whereby the valve member is brought into close contact with the treatment tool, and the treatment tool is in a sealed state.
It is to be inserted inside.

[0010]

However, in the forceps plug 100, when a physiological saline solution or the like for securing a visual field is delivered from the mouthpiece 107 by a drip set or a syringe, the delivery pressure is considerably high. Liquid leakage may occur through the slit 103 of the stopper 102.

Further, when the outer plug 102 is deteriorated, a treatment instrument having a diameter smaller than the inner diameter of the small hole 104 is inserted into the treatment instrument insertion hole 105.
When it is inserted into the inside, not only the slit 103 but also the small hole 104 cannot secure the sealing property, and there is a risk that the internal pressure of the body cavity will increase and the filth inside the body will leak out of the body and the operator will be submerged in water.

Further, in the device provided with the valve member, since the rotating operation of the tightening ring is complicated, the tightening ring is over-tightened to increase the amount of insertion / removal force of the treatment tool, or However, there was a problem that it was so sweet that liquid leakage occurred, and it was difficult to adjust the tightening.

The present invention has been made in view of the above circumstances, and an object thereof is to have a high sealing property even when the treatment instrument is not inserted and to treat the treatment instrument even when the treatment instrument is inserted. An object of the present invention is to provide a valve device for an endoscope, which has a sealing property that is not affected by the diameter of the endoscope and has good operability.

[0014]

In order to solve the above problems, the present invention provides an endoscope valve device which is detachably attached to an insertion side opening of a treatment instrument insertion channel of an endoscope. A tubular member having a treatment instrument insertion hole attached to the insertion side opening of the treatment instrument insertion channel and communicating with the treatment instrument insertion channel; and a treatment instrument insertion hole connected to the tubular member. A detachable closure plug having a through hole that seals the outside in a sealed state and allows the treatment tool to be inserted in the sealed state, and the treatment tool insertion hole provided on the treatment tool insertion hole side of the closure plug Either of a state of being made of an elastic member having a hollow hole through which the treatment instrument to be inserted is made to be reduced to close the treatment instrument insertion hole through which the treatment instrument passes and a state of being expanded to open the treatment instrument insertion hole through which the treatment instrument is passed. And a detachable valve member A valve operating adjustment ring that is rotatably linked to the tubular member, and a cam groove is formed in one of the tubular member and the adjustment ring, and the other member moves along the cam groove. A possible engagement pin is provided, and the cam groove and the engagement pin rotate the adjustment ring to rotate the adjustment ring to open the valve member, and a second engagement position to close the valve member.
A cam mechanism having an engagement position of 1) and a mouthpiece portion that communicates with the treatment instrument insertion channel from the middle of the treatment instrument insertion hole.

[0015]

In the above structure, the position of the valve operation adjusting ring is deterministically determined by selectively selecting the engagement position between the engagement pin and the cam groove between the first engagement position and the second engagement position. Is prescribed. As a result, the valve member is transformed into a state in which the diameter is reduced to close the treatment instrument insertion hole through which the treatment instrument passes and a state in which the valve member is enlarged to open the treatment instrument insertion hole through which the treatment instrument passes.

[0016]

Embodiments of the present invention will be described below with reference to the drawings. 1 to 3 show a first embodiment of the present invention. As shown in FIG. 3, an endoscope 50 to which the endoscope valve device 1 of the present embodiment is attached is an electronic endoscope incorporating an image pickup device, and includes an insertion portion 51 and an operation portion 52. The endoscope body is composed of. One end of a universal cord 55 is connected to the operation section 52. The universal cord 55 has the other end connected to a video processor 60 having a light source device therein via a connector 56, so that an image pickup signal from the endoscope 50 is received by the video processor 6.
0 can be transmitted.

Further, the video processor 60 has a signal processing circuit for processing the image pickup signal from the endoscope 50 transmitted through the universal code 55, and the processed signal is connected to the video processor 60. The image is transmitted to the monitor 63 and displayed as an image. This allows the operator to observe the inside of the endoscope 50 inserted.

The operation portion 52 is provided with a treatment instrument insertion opening 53 to which the endoscope valve device 1 can be detachably attached.
The treatment instrument insertion port body 53 communicates with a treatment instrument insertion channel (not shown) provided in the insertion portion 51 and opened at the tip of the insertion portion 51.

FIG. 1 shows the structure of an endoscope valve device 1. In the figure, the left side of the center line shows a normal state of the valve device 1, and the right side of the center line shows a state in which an outer cylinder 4 (described later) is pivotally operated and slid downward. There is.

As shown, the valve device 1 includes a fixed ring 3
It has an inner cylinder 2 as a cylindrical member that is attached to the treatment instrument insertion port body 53 of the endoscope 50 through 7. The inner cylinder 2 has a treatment instrument insertion hole 18 that communicates with a treatment instrument insertion channel of the endoscope 50 with the valve device 1 attached to the treatment instrument insertion port body 53. The inner cylinder 2 has a protruding cylinder portion 2a protruding upward from an upper end 25 thereof, and a flange portion 26 is formed at the tip of the protruding cylinder portion 2a.

A substantially tubular valve member 16 formed of an elastic material such as silicon rubber is detachably provided on the upper end 25 of the inner cylinder 2. The valve member 16 has a treatment instrument insertion hole 18
It has a hollow hole 30 through which a treatment tool inserted therein is inserted, and the hollow hole 30 is attached in a state where the center line of the hollow hole 30 is substantially aligned with the center line of the treatment tool insertion hole 18. In this case, the bottom portion 16a of the valve member 16 is fitted into the recess 29 formed by the flange portion 26 and the upper end 25 of the inner cylinder 2, and the flange portion 26 of the protruding cylinder portion 2a is recessed in the body portion of the valve member 16. The valve member 16 is fixed to the inner cylinder 2 by being fitted into the portion 16c. In addition, a hollow hole 30 is provided in the upper portion of the valve member 16.
Is provided with a deformable protrusion 16b.

The lower end connecting portion 2b of the inner tube 2 connected to the treatment instrument insertion opening 53 of the endoscope 50 is provided with a flange portion 27 having a threaded portion formed on the outer periphery thereof.
A syringe taper portion 2c is provided on the lower side of 7.
Further, the fixing ring 3 is attached to the thread portion on the outer periphery of the flange portion 27.
7 is rotatably screwed. In the fixing ring 37,
A stopper ring 36 is provided at the upper end thereof, and a cutout portion 39 is provided at the lower end thereof. Further, the outer periphery of the fixing ring 37 is knurled.

Therefore, with the syringe taper portion 2c fitted in the treatment instrument insertion port body 53, the flange portion 27 is formed.
The fixing ring 3 against the edge of the treatment instrument insertion opening 53.
By tightening 7, the lower end connecting portion 2b of the inner cylinder 2 is fixed to the treatment instrument insertion port body 53.

On the outer side of the upper end portion of the inner cylinder 2, an outer cylinder 4 serving as a valve operating adjustment ring capable of sliding and rotating with respect to the inner cylinder 2.
Is provided. In this case, the outer cylinder 4 is arranged such that the inwardly protruding partition portion 4a is abutted against the upper end of the protrusion 16b of the valve member 16. Further, a cam groove 24 is formed in the outer cylinder 4, and an engagement pin 22 movable along the cam groove 24 is provided on the side wall of the inner cylinder 2 so as to be engaged with the cam groove 24. The outer cylinder 4 is fixed to the inner cylinder 2 by engaging the pin 22. Therefore, the sliding and rotating operations of the outer cylinder 4 with respect to the inner cylinder 2 are
It is regulated by a cam mechanism including the engagement pin 22 and the cam groove 24.

As shown in FIG. 2, the cam groove 24 is formed in the outer cylinder 4
Is formed diagonally along the side wall of the engaging pin 2
It has two locking portions 40 and 41 for locking 2. When the engagement pin 22 is locked to the first locking portion 40 located below the cam groove 24, the outer cylinder 4 is held at the normal position shown on the left side of FIG. Further, by moving the engagement pin 22 along the cam groove 24, the outer cylinder 4 is rotated to lock the engagement pin 22 in the second locking portion 41 located below the cam groove 24. In this state, the outer cylinder 4 is held in the pushing position shown on the right side of FIG. At this pushed-in position, the protrusion 16b of the valve member 16 is crushed by the partition 4a of the outer cylinder 4 as described later, and the treatment tool insertion hole 1
The hollow hole 30 leading to 8 is closed. That is, the cam groove 2
The cam mechanism composed of 4 and the engaging pin 22 includes a first engaging position 40 for opening the valve member 16 and a second engaging position 41 for closing the valve member 16 by rotating the outer cylinder 4.
And have.

Further, the treatment tool insertion hole 1 is provided at the upper end of the outer cylinder 4.
A blocking plug 10 that constantly blocks the inlet of 8 is detachably provided. The closure plug 10 is made of silicone rubber having a normally closed slit 25 formed in the center.
2 and an inner plug portion 14 made of silicone rubber having a small hole 21 through which a treatment tool can be inserted in a sealed state.

The outer plug portion 12 is detachably fitted to the upper end flange portion 15a of the base portion 15 having a knurled outer periphery. In addition, a cylindrical inner plug portion 14 is arranged in a dish portion 23 formed by an extending portion 4b extending upward from the partition portion 4a of the outer cylinder 4 and an upper surface of the partition portion 4a. The inner plug portion 14 is configured such that the ring-shaped convex portion 15b formed on the lower surface of the mouthpiece portion 15 is engaged with the corresponding annular groove 31 on the upper surface of the inner stopper portion 14, and the mouthpiece portion 15 is inserted into the outer cylinder 4. By being screwed into the threaded portion 19 formed on the outer surface of the extended portion 4b, it is pressed and fixed onto the upper surface of the partition portion 4a of the outer cylinder 4.

Further, on the lower side wall of the inner cylinder 2, there is provided a mouthpiece portion 35 to which a syringe, a liquid feeding tube or the like (not shown) can be connected. In this case, the inner hole of the mouthpiece portion 35 communicates with the treatment instrument insertion hole 18 through the side hole 32 provided in the inner cylinder 2. Further, the base portion 35 has a cock 33 that is rotatably provided. Then, by rotating the cock 33, the flow of the fluid connected to the mouthpiece portion 35 can be controlled. That is, when the cock 33 is in the position shown by the solid line in the figure, the inner hole of the mouthpiece part 35 and the treatment instrument insertion hole 18 communicate with each other through the side hole 32, and when it is in the position shown by the two-dot chain line in the figure, the mouthpiece part 35 is shown. The communication between the inner hole and the treatment instrument insertion hole 18 is blocked.

Next, the operation of the endoscope valve device 1 having the above configuration will be described. In the state where the engagement pin 22 is engaged with the first engagement portion 40 located below the cam groove 24 and the outer cylinder 4 is held at the normal position shown on the left side of FIG. 1, the protrusion 16b of the valve member 16 is provided. The inner diameter of the hollow hole 30 formed by
It becomes larger than the inner diameter of the small hole 21 of No. 4. In this state,
Even if filth or air inside the body tries to leak out of the living body through the treatment tool insertion channel of the endoscope 50 due to changes in the pressure inside the body, the sealability is secured by the normally closed slit 25 of the outer plug portion 12. Therefore, leakage of the dirt and the like can be prevented. Further, in this state, even when a treatment tool (not shown) is inserted through the slit 25 of the outer plug portion 12, the small hole 21 of the inner plug portion 14 ensures the sealing property.

Here, if the slit 25 of the outer plug portion 12
When a treatment instrument having a diameter smaller than the inner diameter of the small hole 21 is inserted in the state of deterioration, the sealability cannot be ensured not only in the slit 25 but also in the small hole 21, and due to the rise in the pressure inside the body cavity, through the mouthpiece 35. The sent physiological saline solution, body waste, etc. may leak out of the body through the slit 25 of the outer plug part 12.

In such a case, by moving the engagement pin 22 along the cam groove 24, the outer cylinder 4 is rotated to engage the second locking portion 41 located below the cam groove 24. The dowel pin 22 is locked. In this state, the outer cylinder 4 is shown in FIG.
Is held in the push-in position shown on the right side of. At this pushed-in position, the protruding portion 16b of the valve member 16 is crushed by the partition portion 4a of the outer cylinder 4, so that the treatment instrument insertion hole 1
The hollow hole 30 leading to 8 is deformed in the closing direction.

In this case, that is, when a treatment instrument having a diameter smaller than the inner diameter of the small hole 21 is inserted, the hollow hole 30 is contracted to a diameter smaller than the inner diameter of the small hole 21 of the inner plug portion 14. As a result, the valve member 16 is brought into close contact with the treatment tool to ensure the sealing property. If the treatment tool is not inserted, the hollow hole 30 is completely closed and the treatment tool insertion hole 18 is closed to the outside.

As described above, in the endoscope valve device 1 of this embodiment, the engagement positions of the engagement pin 22 and the cam groove 24 are set to the first engagement position 40 and the second engagement position. Alternatively, the position of the outer cylinder 4 can be definitively defined by selecting the position 41, and the valve member 16 is reduced in diameter to close the treatment instrument insertion hole 18 through which the treatment instrument passes. Since the diameter is expanded and the treatment tool insertion hole 18 through which the treatment tool passes is deformed to any one of the states, even if the slit 25 is deteriorated or a small-diameter treatment tool is inserted, there is little fluctuation and stability. The sealing property can be secured.

Therefore, there is no problem that the tightening ring for reducing the diameter of the valve member is over-tightened to increase the amount of insertion / removal force of the treatment instrument as in the conventional case, or the tightening is loose and liquid leakage occurs. With a simple operation of simply rotating the tube 4, it is possible to secure a high sealing property even when the treatment instrument is not inserted, and the sealing property is not affected by the diameter of the treatment instrument even when the treatment instrument is inserted. Can be secured.

In this embodiment, the flow of the fluid sent to the inside of the body is turned on by opening and closing the cock of the mouthpiece 35.
・ Because it can be controlled OFF, it is not necessary to use another adapter such as a three-way stopcock.

FIG. 4 shows a second embodiment of the present invention. The endoscope valve device 70 of the present embodiment is one in which the inner plug portion 14 and the valve member 16 of the first embodiment are integrally formed by an elastic member such as silicon rubber, and are integrally formed. The second inner plug portion 72 is divided into the partition portion 4a of the outer cylinder 4.
It is provided to be removable.

Further, the second inner plug portion 72 has a partition portion 4a.
The portion located above the inner plug portion 14 of the first embodiment
It has the same structure as the above, and has a foot portion 72a at a site lower than the partition portion 4a. In addition, the upper end of the inner cylinder 2 is the foot portion 7
It is a tapered mortar portion 2d that supports 2a. Further, the base portion 15 covers the outer cylinder 4 so that it cannot be seen from the outside. The rest of the configuration is the same as in the first embodiment.

Therefore, the valve device 70 for an endoscope having the above-mentioned configuration.
Even in this case, the outer cylinder 4 is rotated by moving the engagement pin 22 along the cam groove 24, and the engagement pin 22 is attached to the second locking portion 41 located below the cam groove 24. Is locked, the foot portion 72a of the second inner plug portion 72 is pressed against the mortar portion 2d of the inner cylinder 2 to be deformed, and the hollow hole 30 is reduced in diameter. Therefore, similar to the first embodiment. It is possible to obtain the action and effect.

FIG. 5 shows a third embodiment of the present invention. As shown in FIG. 5A, in the endoscope valve device 80 of the present embodiment, a vertically elongated oval side hole 32a is provided in the inner cylinder 2 in the first embodiment, and this side hole 32a is provided. The corresponding base portion 82 is provided above the cam groove 85 of the outer cylinder 4. As shown in FIG. 5B, the cam groove 85 is provided in the first engagement portion 9
0, a second engaging portion 91 connected to the first engaging portion 90 through a horizontally extending first passage 85a, and a first passage 85.
a third engaging portion 92 connected to the second engaging portion 91 via a second passage 85b extending vertically downward with respect to a;
A fourth passage connected to the third engagement portion 92 through a third passage 85c extending in the same direction as the first passage 85a from the engagement portion 92 of
And the engaging portion 93. In this case, the fourth engaging portion 93 faces the first engaging portion 90, and the third engaging portion 92 is open at the lower end of the outer cylinder 4 via the passage 85d.

The engaging pin 84 provided on the inner cylinder 2
Is engaged with either the second engaging portion 91 or the third engaging portion 92 of the cam groove 85, the inner hole 41 of the base portion 34 and the side hole 35 communicate with each other, and the engaging pin 84. Is the first of the cam grooves 85
The communication between the inner hole 41 of the mouthpiece portion 34 and the side hole 35 is blocked in a state of being engaged with either the engaging portion 90 or the fourth engaging portion 93.

Further, in the normal state shown on the left side of the drawing, the engagement pin 84 is engaged with either the first engagement portion 90 or the second engagement portion 91 of the cam groove 85, and the valve When the member 16 is deformed to close the hollow hole 30, the engaging pin 84 is engaged with either the third engaging portion 92 or the fourth engaging portion 93 of the cam groove 85 in the pushed-in state on the right side in the drawing. is doing.

In the figure, the third engaging portion opens to the lower end of the outer cylinder 4 through the passage 85d, but the fourth engaging portion 9
3 may be opened. Further, the first engaging portion 90 and the fourth engaging portion 93 may communicate with each other.

In this embodiment, however, the fluid flow can be turned on / off depending on the positions of the engaging portions 90 to 93 of the cam groove 85 with which the engaging pin 84 engages.
It is not necessary to use the cock 33 as in the above embodiment, and the cost is reduced. In this embodiment, although the shape of the protrusion 16a of the valve member 16 is slightly different from that of the first embodiment, the operation of deforming and closing the hollow hole 30 is the same.

FIG. 6 shows a fourth embodiment of the present invention. In the endoscope valve device 95 of the present embodiment, the closing plug 94 that is detachably provided on the upper portion of the outer cylinder 4 is composed of an upper plug 94a and a lower plug 94b made of an elastic member such as rubber. There is. The upper stopper 94a and the lower stopper 94b have an integral structure that is connected by a connecting portion 94c. The upper plug 94a and the lower plug 94b have a substantially cylindrical structure.

A flange portion 96 is provided on the outer peripheral portion of the lower end of the upper plug body 94a, and the flange portion 96 is airtight and detachable from a recess 97 provided on the inner peripheral surface of the upper portion of the lower plug body 94b. It is designed to engage. In addition, on the inner peripheral surface of the lower end of the lower plug 94a, a protrusion-like engaging portion 99 that is detachably engaged with a flange portion 98 provided on the upper end of the outer cylinder 4 is provided.

A slit 25 for hermetically inserting the treatment tool is formed in the center of the upper plug 94a. Further, a small hole 21 for hermetically inserting the treatment tool is also provided in the center of the lower plug 94b. The inner surface of the upper portion of the outer cylinder 4 is formed in a tapered shape, and forms a syringe taper portion 4 c communicating with the treatment instrument insertion passage 18. Further, the outer circumference of the outer cylinder 4 is knurled. The other structure is the same as that of the third embodiment.

In this embodiment, the closure plug 94, which is a single member, is formed by integrally forming the upper plug 94a and the lower plug 94b.
Both the small hole 21 and the slit 25 are provided in the outer cylinder 4 and the block plug 94 having the small hole 21 and the slit 25 is attached to the outer cylinder 4.
The sealability with respect to the outside of the treatment instrument insertion passage 18 is secured only by attaching to the flange portion 98 at the upper end of the treatment instrument insertion passage 18. That is, unlike the above-described embodiments, the inner plug portion 14, the outer plug portion 12, and the base 15 are not individually attached to the outer cylinder 4, but a one-piece closure plug including the small hole 21 and the slit 25. Body 94
The sealability of the treatment instrument insertion passage 18 to the outside can be secured by a single operation of simply attaching the instrument to the outer cylinder.

In each of the above embodiments, an example in which the endoscope valve device is applied to an electronic endoscope has been shown. However, instead of an electronic endoscope, an optical endoscope having an eyepiece lens and an eyepiece portion, etc. May be applied to.

[0049]

As described above, in the valve device for an endoscope of the present invention, the engagement position between the engagement pin and the cam groove is selected between the first engagement position and the second engagement position. The position of the valve operation adjusting ring can be definitively selected to define the position of the valve member so that the valve member is reduced in diameter to close the treatment instrument insertion hole through which the treatment instrument passes and expanded in diameter. Even if the obstruction plug deteriorates or a small-diameter treatment tool is inserted, it is possible to secure stable sealing with little fluctuation because the treatment tool insertion hole through which the tool passes is deformed. it can.

Accordingly, there is no problem that the tightening ring for reducing the diameter of the valve member is overtightened to increase the amount of insertion / removal force of the treatment tool as in the conventional case, or the tightening is loose and liquid leakage occurs. With a simple operation of simply rotating the operation adjustment ring, high sealing performance can be secured even when the treatment tool is not inserted, and even when the treatment tool is inserted, the sealing performance does not depend on the diameter of the treatment tool. Can be secured.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a valve device for an endoscope showing a first embodiment of the present invention.

2 is a plan view of a cam mechanism provided in the valve device of FIG. 1. FIG.

FIG. 3 is a configuration diagram of an endoscope device to which the valve device of FIG. 1 is attached.

FIG. 4A is a sectional view of a valve device for an endoscope showing a second embodiment of the present invention, and FIG. 4B is a plan view of a cam mechanism provided in the valve device of FIG.

5A is a sectional view of a valve device for an endoscope showing a third embodiment of the present invention, and FIG. 5B is a plan view of a cam mechanism provided in the valve device of FIG. 5A.

FIG. 6 is a cross-sectional view of essential parts of a valve device for an endoscope showing a fourth embodiment of the present invention.

FIG. 7 is a partial cross-sectional view showing a conventional example of a valve device.

[Explanation of symbols]

1, 70, 80, 95 ... Endoscope valve device, 2 ... Inner cylinder, 4
Outer cylinder, 10 ... Blocking plug, 12 ... Outer plug, 14 ... Inner plug, 16 ... Valve member, 18 ... Treatment tool insertion hole, 21 ... Small hole (through hole), 22 ... Engagement pin, 24 ... cam groove, 25 ... slit (through hole).

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[Procedure amendment]

[Submission date] November 12, 1993

[Procedure Amendment 1]

[Document name to be amended] Statement

[Correction target item name] 0026

[Correction method] Change

[Correction content]

Further, the treatment tool insertion hole 1 is provided at the upper end of the outer cylinder 4.
A blocking plug 10 that constantly blocks the inlet of 8 is detachably provided. The closure plug 10 includes an outer plug portion 12 made of an elastic member such as silicon rubber having a normally closed slit 25 formed in the center, and a silicone rubber having a small hole 21 through which a treatment instrument can be inserted in a sealed state . The inner plug portion 14 is made of an elastic member .

[Procedure Amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0028

[Correction method] Change

[Correction content]

Further, on the lower side wall of the inner cylinder 2, there is screwed a base portion 35 to which a syringe, a liquid feeding tube or the like (not shown) can be connected.
It is provided. In this case, the inner hole of the mouthpiece portion 35 communicates with the treatment instrument insertion hole 18 through the side hole 32 provided in the inner cylinder 2. Further, the base portion 35 has a cock 33 that is rotatably provided. Then, by rotating the cock 33, the flow of the fluid connected to the mouthpiece portion 35 can be controlled. That is, when the cock 33 is in the position shown by the solid line in the figure, the inner hole of the mouthpiece part 35 and the treatment instrument insertion hole 18 communicate with each other through the side hole 32, and when it is in the position shown by the two-dot chain line in the figure, the mouthpiece part 35 is shown. The communication between the inner hole and the treatment instrument insertion hole 18 is blocked.

[Procedure 3]

[Document name to be corrected] Drawing

[Name of item to be corrected] Figure 1

[Correction method] Change

[Correction content]

[Figure 1]

[Procedure amendment 4]

[Document name to be corrected] Drawing

[Name of item to be corrected] Figure 4

[Correction method] Change

[Correction content]

[Figure 4]

Claims (1)

[Claims] 1. A valve device for an endoscope which is detachably attached to an insertion side opening portion of a treatment instrument insertion channel of an endoscope, wherein the endoscope valve device is attached to the insertion side opening portion of the treatment instrument insertion channel. And a tubular member having a treatment tool insertion hole communicating with the treatment tool insertion channel, and the treatment tool insertion hole that is connected to the tubular member to seal the treatment tool insertion hole from the outside in a sealed state and to seal the treatment tool in a sealed state. A retractable obstruction plug having an insertable through-hole, and an elastic member having a hollow hole provided on the treatment instrument insertion hole side with respect to the obstruction plug and having a hollow through which the treatment instrument is inserted into the treatment instrument insertion hole. A valve member that is deformable and detachable into a state in which a treatment instrument insertion hole through which a treatment instrument passes and a diameter is closed and a treatment instrument insertion hole through which a treatment instrument passes is opened, and the tubular member. A control ring for valve operation that is connected to and rotatable A cam groove is formed in one of the tubular member and the adjustment ring, and an engagement pin movable along the cam groove is provided in the other member, and the cam groove and the engagement pin are adjusted by the adjustment member. A first engagement position for opening the valve member and a second position for closing the valve member by rotating the ring.
The endoscope valve device according to claim 1, further comprising a cam mechanism having an engagement position of 1. and a mouthpiece portion that communicates with the treatment instrument insertion channel from the middle of the treatment instrument insertion hole.