JPH05161599A - Suction controller - Google Patents

Abstract

PURPOSE:To provide a suction controller which keeps a body liquor from scattering outside a leak hole when a sucking operation is performed. CONSTITUTION:This apparatus has a cylinder 8 communicating with a suction channel 7 of an endoscope, a cap part 21 which is opened on a side wall of the cylinder 8 and leads to a suction means, a valve body 10 provided between the cap part 21 and the suction channel 7 and an operating member 12 which is movable by a specified stroke in the axial direction of the cylinder 8 to perform an operation of opening or closing a valve body 10 while opening or closing a leak passage 16 for communication between the cap part 21 and the outside. Moreover, a leak level changing mechanism is formed to reduce a sectional area of the leak passage 16 halfway in the moving of a forcing stroke of the operating member 12 forcibly to the final position.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a suction control device provided with a leak amount changing mechanism for reducing the cross-sectional area of a fluid passage.

[0002]

2. Description of the Related Art Generally, a suction control device is provided in an operation portion of an endoscope. By operating this suction control device, dirt, body fluid and the like in a body cavity can be sucked out of the body cavity through a suction channel. There is. Conventionally, as this type of suction control device, for example, as shown in Japanese Utility Model Laid-Open No. 1-80102, in a cylinder connected to a suction channel,
The valve member provided between the suction port and the suction channel is opened by the operation member, and the leak gap that connects the suction port and the atmosphere through the inside of the cylinder is closed by the elastic member. Was to do.

[0003]

However, in such a device, when the valve body is opened, the leak gap is also opened to the outside, so that dirt, body fluid, etc. that have been sucked in the suction channel can be eliminated. There was a problem that it would fly to the outside from the leak gap or stick to the operator's hands and fingers with the momentum. As a countermeasure against this, it is possible to bend the path from the suction channel to the leak gap so that the suctioned material does not jump out due to the barrier, but the pipe line configuration becomes complicated and the cleaning performance of the device is reduced. There was a problem.

Further, as disclosed in Japanese Patent Application No. 3-255551, there is a device in which the cross-sectional area of the leak gap is set as small as possible from the beginning to prevent the suctioned substance from popping out. Since a sufficient leak flow rate cannot be obtained, the inside of the cylinder is constantly in the negative pressure state of the temperature, which adversely affects the opening operation of the valve body, or the valve body is not completely closed and the valve is always sucked from the channel. Could be.

The present invention has been made in view of the above-mentioned points, and while securing a sufficient leak flow path during non-suction, at the time of suction, the suctioned substance jumps out and adheres to the operator. It is an object of the present invention to provide a safe and reliable suction control device that does not have any problems.

[0006]

[Means and Actions for Solving Problems] A cylinder forming a chamber communicating with a suction channel of an endoscope, a suction port opened on a side wall of the cylinder for making a negative pressure in the chamber, a suction port and a suction channel. And a valve member provided between the two, which is movable by a predetermined stroke in the axial direction of the cylinder, and which opens and closes the valve member, and an operating member for opening and closing a leak passage that communicates the suction hole with the outside. In a suction control device including a fluid flow path formed between the outer surface of the operation member and the inner surface of the cylinder via the valve body, in the initial stage of the pushing stroke of the operation member, the cross-sectional area of the leak path is A leak amount changing mechanism is formed to completely close the leak path at the push-in final position where the stroke is reduced by at least the time when the push-in is not performed. The leakage amount change mechanism, and at the same time the valve is opened, to reduce the cross-sectional area of the fluid flow path than in the closed state. Therefore, when not suctioning, while ensuring a sufficient leak flow rate, at the same time as being in a suctioned state, it is possible to prevent the suctioned material from sticking to the operator due to the projection of the suctioned material to the outside by reducing the cross section of the leakage path. The opening and closing operation of the valve element is ensured.

[0007]

Embodiments of the present invention will be specifically described below with reference to the drawings. 1 to 7 relate to a first embodiment of the present invention, FIG. 1 is a perspective view showing an endoscope provided with a suction control device of the first embodiment, and FIG. 2 is a perspective view showing a state in which a suction operation is not performed. 1
FIG. 3 is a cross-sectional view showing the suction control device of the embodiment, FIG. 3 is a cross-sectional view showing the suction control device of the first embodiment in the middle of performing the suction operation, and FIG. 4 is a first view showing the state of performing the suction operation. FIG. 5 is a sectional view showing a suction control device of an embodiment, FIG. 5 is an enlarged sectional view showing a non-suctioning state and a suctioning state, FIG. 6 is a sectional view when used without a cover attached, and FIG. It is explanatory drawing which shows a mode that a valve body is removed.

As shown in FIG. 1, the endoscope provided with the first embodiment includes an elongated insertion portion 1 to be inserted into a body cavity, and a grip portion 2 provided at a rear end of the insertion portion 1. , This grip 2
The operation unit 3 is provided at the rear end of the operation unit 3 and the eyepiece unit 4 is provided at the rear end of the operation unit 3. The operation portion 3 is provided with a bending operation lever 5 for bending the distal end side of the insertion portion 1 and for sucking the treatment tool channel formed in the insertion portion 1 through the suction channel. The suction control device 6 is provided.

In the suction control device 6 of the first embodiment attached to the operation portion 3, the pipe-shaped base portion 21 is provided from the side.
Is extended to the outside of the operation portion 3, and a suction tube 23 connected to a suction device such as a suction pump (not shown) is attached to the connection portion 22 at the end of the mouthpiece portion 21.
Further, in the suction control device 6, a suction operation portion 13 for performing a suction operation is formed on the top portion, and the suction operation can be performed by pushing the operation portion 3 with a finger holding the operation portion 3.

The mouthpiece portion 21 is formed in a pipe shape so that the mouthpiece portion 21 is pulled out in a direction that does not interfere with the operation of, for example, the switch 24 provided as another operation means in the operation portion 3. For example, the suction control device 6 may be installed in the operation unit 3
When it is attached to the attachment hole 3a (see FIG. 2), the pipe-shaped (suction) mouthpiece 21 is attached to the suction control device 6
Positioning in the circumferential direction is performed so that the cylinder 8 (see FIG. 2), which is the cylindrical portion of FIG. By providing in this way, the suction operation and the switch operation can be easily performed.

The suction control device 6 of the first embodiment has the structure shown in FIG. 2 during the non-suction operation. In FIG. 2, a suction channel 7 communicates with a treatment tool channel (not shown), and a cylinder 8 of the suction control device 6 of the first embodiment is connected to the suction channel 7. An inner cylinder 9 is detachably fitted to the cylinder 8, and a valve body 10 made of an elastic material such as rubber is provided at a lower end portion of the inner cylinder 9. The valve body 10 has a substantially cylindrical shape, and a dome-shaped closing film 10a for closing the lower end opening of the inner cylinder 9 is provided in the lower portion thereof, and the slit 1 is formed in the center of the closing film 10a.
1 is formed.

A rod-shaped operating member 12 is provided in the inner cylinder 9.
However, it is provided so as to be movable back and forth by a predetermined stroke amount in the axial direction of the inner cylinder 9. The cross section of the lower portion 12b formed on the lower side of the substantially cylindrical leak flow path adjusting member 12a formed on the upper side portion of the operating member 12 is cross-shaped, and the upper end portion of the operating member 12 has this cross section. A (suction) operation unit 13 is provided for allowing the lower end of the operation member 12 to push the closing film 10a of the valve body 10 to open the slit 11.

The lower portion 12b and the operating portion 13 are connected via a leak passage adjusting member 12a having a cylindrical cross section,
The outer diameter of the adjusting member 12a is formed to be slightly smaller than the inner diameter of the upper inner surface 9a of the inner cylinder 9, and a small leak passage is formed even when the adjusting member 12a faces the inner surface of the upper inner surface 9a. There is. Further, as shown in FIG. 3, when the lower end portion 12c of the operation member 12 abuts on the closing film 10a, the lower end portion 14 of the adjusting member 12a is provided at a position close to the upper end portion 15 of the inner cylinder 9. Has been.

A leak passage 16 is formed by the upper inner surface 9a of the inner cylinder 9 and the lower portion 12b of the operating member 12 and both outer surfaces of the leak passage adjusting member 12a. This leak channel 1
The substantial cross-sectional area of 6 is from the state shown in FIG. 2 until the lower end 14 of the adjusting member 12a approaches the upper end 15 of the inner cylinder 9 as shown in FIG. 3 until just before reaching FIG. , Is set to be approximately 1/2 or less.

Further, the lower end of the cover 17 is engaged with a recess provided in the vicinity of the upper end 15 of the inner cylinder 9.
The upper end of is attached so as to contact a column adjacent to the operation portion 13 of the operation member 12. The cover 17 is formed of an elastic material such as rubber into a cylindrical shape having a bulged central portion, and has elasticity in the axial direction of the cylinder. That is, the operating member 12 can be returned to the home position (that is, the state shown in FIG. 2) with respect to the inner cylinder 9 by the elastic force of the cover 17 (after moving the operating member 12 shown in FIG. 4 downward). Is urged by.

A leak hole 18 for sucking air is formed in the cover 17 near the lower end. As shown in FIG. 2, in the state where the leak flow channel 16 is secured, that is, when the suction operation (the operation of pushing the operation portion 13) is not performed, the leak hole 18 communicates with the base portion 21 via the leak flow passage 16. Ready to go.

Further, a base end portion of a mouthpiece portion 21 forming a suction passage 19 is integrally formed on a side portion of the inner cylinder 9. A suction pump (not shown) is connected through a suction tube (see FIG. 1) to the connection portion 22 at the tip of the mouthpiece portion 21 (when a suction operation for closing the leak channel 16 is performed). The suction force of the pump is capable of sucking dirt, body fluid and the like in the body cavity (state of FIG. 4). The base end of the mouthpiece 21 is engaged with a notch formed in the cylinder 8.

In this embodiment, when the suction operation is not performed as shown in FIG. 2, a sufficient leak passage 16 is secured, and the valve element 10 is in the middle of performing the suction operation as shown in FIG.
Immediately before opening the slit 11 of the leak channel adjusting member 12
The cross-sectional area of the leak flow passage 16 is maintained to be, for example, ½ or less in the enlarged diameter portion of a (the portion above the lower end portion 14), and then, as shown in FIG. When the is open, the leak passage 16 is set to be closed.

That is, the operating member 1 when the suction operation is performed
2. At least before the end of the pushing stroke, such as 2), the substantial cross-sectional area of the leak passage 16 is reduced at least before that of the non-pushing state, and the leak passage 16 is completely closed at the pushing final position moved by a predetermined stroke. A leak amount changing mechanism is formed, and when the valve body 10 is opened, the leak amount changing mechanism reduces the substantial cross-sectional area of the leak passage 16 at least as compared with the closed state.

Therefore, when the suction state is obtained while securing a sufficient leak flow rate when not sucking, the substantial cross-sectional area of the leak flow path 16 is reduced, so that the suction state when the suction state is achieved is achieved. It is possible to effectively prevent the suctioned substance sucked through the channel 7 from sticking to the outside due to the protrusion of the suctioned substance to the outside of the operator, and to reliably open and close the valve body 10.

Next, the operation of this embodiment will be described. In the above-described configuration, when not sucking (FIG. 2), the outside air is sucked from the leak hole 18 through the leak passage 16 having a sufficient cross-sectional area by the suction pressure applied to the inner cylinder 9 through the mouthpiece 21. To be done. Next, when sucking dirt, body fluid, or the like in the body cavity, the operating portion 13 is pushed, and the operating member 12 is pushed downward against the elastic force of the cover 17. Then, as shown in FIG. 3, the lower end portion 12c of the operating member 12 abuts on the closing film 10a,
When attempting to push open the slit 11 of the valve body 10, the lower end portion 14 of the leak flow path adjusting member 12a is replaced by the upper end portion 15 of the inner cylinder 9.
, And the cross-sectional area of the leak flow channel 16 sharply decreases.

Therefore, the pressure of the inner cylinder 9 is at the lowest level at this time. When the operating portion 13 is further pushed in, the lower end portion 12c of the operating member 12 pushes the slit 11 of the valve body 10 to widen as shown in FIG. 4, and the suction channel 7 and the inner cylinder 9 are communicated with each other to suck dirt and body fluid. At the same time, the upper end portion 15 of the inner cylinder 9 comes into contact with the cover 17 to completely close the leak passage 16. Also, the operation unit 1
When pressing 3 is stopped and the finger is released, the elastic force of the cover 17 causes the operating member 12 to move in the direction opposite to the direction of pressing, that is, upward, and returns to the non-suction state shown in FIG.

Therefore, according to the first embodiment, the valve body 1
Almost at the same time when 0 is released and suction of waste is started,
Since the leak channel 16 is sharply narrowed, dirt is generated in the leak channel 1.
It is possible to effectively prevent jumping out to the outside via 6. Further, since the leak hole 18 is provided near the bottom of the cover 17, the leak hole 18 is not blocked by the finger, and even if the sucked liquid or the like is ejected, it can be prevented from sticking to the finger.

Further, since the leak passage 16 having a sufficient cross-sectional area is secured during non-suction, the inside of the inner cylinder 9 does not become an excessive negative pressure, and the opening / closing operation of the valve body 10 is smooth and easy. Definitely done. Further, since it is not necessary to form the leak flow path 16 in a complicated shape, the equipment provided with the suction control device 6 can be easily cleaned. Further, immediately before opening the valve body 10, the inner cylinder 9
Since the negative pressure of can be increased, the start-up of the operation at the start of suction is quick, and suction with good response can be performed.

Further, in this embodiment, as shown in FIG. 5, a convex portion 8c is provided on the outer peripheral surface of the valve body 10 in contact with the inner wall of the cylinder 8. (The left half of FIG. 5 shows the non-suction, and the right half shows the suction.) On the other hand, the inner peripheral surface of the cylinder 8 is subjected to chemical polishing or the like to smooth the surface. By providing the convex portion 8c, it is possible to reduce friction with the cylinder 8 and surely return the valve body 10 after the suction operation to the state where the suction operation is not performed (that is, the state shown in FIG. 2). There is.

Further, since the inner surface of the cylinder 8 is made smooth, the frictional force can be made smaller and the slit 11 of the valve body 10 can be made smaller.
Can be opened and closed more reliably. When the convex portion 8c is not provided, the slit 11 is prevented from being left open due to frictional force even after the suction operation. Further, a convex portion 26 is provided on the lower portion 12b of the operation member 12.
On the other hand, on the other hand, on the lower end side of the cylinder 8, there is provided an engaging portion 8d which is tapered and has a small diameter, which engages with the convex portion 26, and the convex portion 26 abuts on the engaging portion 8d. A restricting unit that restricts the movement of the operation member 12 downward from the position is formed.

As shown in the right half of FIG. 5, the cover 17
In the state in which is attached, the upper end portion 15 of the inner cylinder 9 is attached to the cover 17 before the convex portion 26 comes into contact with the engaging portion 8d.
, The convex portion 26 does not come into contact with the engaging portion 8d. However, since this device 6 has a structure that can be disassembled, it may be possible to assemble it without attaching the cover 17 after cleaning or the like.

In this case, if the operating portion 13 is pushed once in a state where the regulating means is not formed, the leak path 16 is kept closed, so that it is always in a suction state, which is dangerous. It becomes a state. On the other hand, when this restricting means is formed, as shown in FIG. 6, the convex portion 26 is engaged with the engaging portion 8 before the leak path 16 is closed by the restricting means.
The movement is restricted by contacting d. Therefore, it is possible to set the suction state in the leaked state and prevent the dangerous state.

As shown by the dotted line in FIG. 5, the operating member 1
When a protrusion 27 that engages with the lower end of the inner cylinder 9 is provided on the lower end side of 2 to pull out the operating member 12, the protrusion 2
The structure may be such that 7 is caught on the lower end of the inner cylinder 9 and cannot be disassembled. Further, in this embodiment, as shown in FIG. 5, a retaining protrusion 28 (of the cover 17) is provided on the side surface of the cylindrical leak adjusting portion 12a, and a space between the protruding portion 28 and the operating portion 13 is provided. A storage recess of the cover 17 is formed.
The top side of the inner cylinder 9 is formed close to the side surface of the cylindrical leak adjusting portion 12a.

In other words, as shown by the alternate long and short dash line in FIG. 5, when the top side of the inner cylinder 9 is formed apart from the side surface of the leak adjusting portion 12a, the cover 17 is pushed by pushing the cover portion at the opposite position. When it is attempted to store it in a predetermined storage recess, the pushed position is away from the inner peripheral end of the cover 17, so that the inner peripheral end of the cover 17 can pass over the retaining projection 28. While sometimes it is not
When they are provided in close proximity to each other, the position close to the inner peripheral side end of the cover 17 is provided, so that the inner peripheral side end of the cover 17 can be reliably accommodated in the accommodating recess.

When the suction control device 6 is disassembled, the valve body 10 is made of rubber and is small, and it may be difficult to remove it from the inner cylinder 10. In this case, as shown in FIG. 7, the rubber cover 17 is fitted from the lower side of the valve body 10 (one opening of the cover 17 is smaller than the outer diameter of the valve body 10), and when it is subsequently picked, the inner cover together with the cover 17 is inserted. The cylinder 10 can be easily removed. The leak amount is not limited to be reduced at the initial stage of the pushing stroke, and the leak amount may be reduced at least before the final position of the pushing stroke.

FIG. 8 shows a suction control device 31 according to the second embodiment of the present invention. In FIG. 8, the cross section on the left side of the center line shows the structure during suction, and the cross section on the right side shows the structure during non-suction. This suction control device 31 is composed of two bodies, a cylindrical cylinder 32 and an operating member 33, and the cylinder 32 is fitted in the main body of the operating portion 3,
It is attached by adhesion. Further, a tube forming a suction channel 34 is connected to the mouthpiece portion 32a at the lower end of the cylinder 32. A suction hole 35 communicating with the suction device is formed on the side of the cylinder 32.

The operating member 33 has an operating portion 36 formed on the top, a first inner pipe 37 to which the base end side tubular portion of the operating portion 36 is fitted and attached, and the first inner pipe. The other end of 37 is fitted with a second inner pipe 38 which is attached.

A first elastic member 39, which functions as a leak flow path adjusting member, is attached to the first inner pipe 37 so as to be annularly mounted in a concave portion adjacent to the convex portion, and the coil spring 40 is adjacent to the convex portion. Is wrapped around. One end of the coil spring 40 comes into contact with this convex portion, and the other end thereof has a tapered step portion 32 of the cylinder 32.
The coil spring 40 abuts on the spring receiving member 41 positioned in b, and the convex portion formed on the first inner pipe 37 is biased upward, and thus the operating member 33 is biased upward. ing.

A second elastic member 43 is annularly mounted in the recess formed near the lower end of the second inner pipe 38. The second elastic member 43 abuts on the convex portion 44 formed on the inner surface of the cylinder 32 during the non-suction operation, and the suction hole 35 formed on the upper side of the convex portion 44 communicates with the leak passage 45. As shown in the left side of FIG. 8, during the suction operation, the suction hole 35 is separated from the convex portion 44 and the suction hole 35 is in communication with the suction channel 34.

That is, the second elastic member 43 forms a valve body which connects or blocks the suction hole 35 and the suction channel 34. The leak passage 45 is closed during this suction operation. It should be noted that the spring receiving member 41 is formed with a hole or a groove for communicating the suction hole 35 and the leak flow path 45 when not sucking.

On the other hand, the outer diameter of the first elastic member 39 functioning as a leak flow path adjusting member is set to be slightly smaller than the inner diameter of the upper inner surface 46 of the cylinder 32, and the lower end portion 39a of the first elastic member 39 has the second inner diameter. At the same time as the elastic member 43 separates from the convex portion 44, the elastic member 43 approaches the upper step portion 46a of the upper side inner surface 46 and reduces the substantial cross-sectional area of the leak flow passage 45.

The upper inner surface 46 forms a continuous cylinder inner surface through the tapered lower step portion 46b to the lower inner surface 47 having a smaller inner diameter therebelow. Therefore, when the operation portion 36 is pushed in and the first elastic member 39 comes into contact with the lower step portion 46b as shown on the left side of FIG. 8, the inner surfaces 47 and 46 of the cylinder 32, the operation member 33, and the operation portion 3 are brought into contact.
The leak passage 45 formed by the vertical groove formed in the tubular portion of 6 is completely blocked.

Next, the operation of this embodiment will be described. In the above configuration, when not sucking, outside air is sucked into the cylinder 32 through the leak flow path 45 and is sucked from the suction hole 35 to an external suction device (not shown). Next, when performing suction from the suction channel, the operating portion 36 is pushed to pull the elastic member 43 away from the in-cylinder convex portion 44 against the coil spring 40. At this time, at the same time, the lower end portion 39a of the first elastic member 39 forming the leak flow passage adjusting member is close to the upper step portion 46a of the upper inner surface 46, and thus the leak flow passage 45 formed by the gap therebetween is formed. The cross-sectional area is drastically reduced.

By further pushing, as shown in the left cross section of FIG. 8, the elastic member 43 is sufficiently separated from the convex portion 44,
While securing the suction conduit, the first elastic member 39 impinges on the lower step portion 46b of the upper inner surface 46 and completely closes the leak passage 45.

This embodiment has almost the same effect as the first embodiment. In each of the above-described embodiments, the cross-sectional area of the leak channel is reduced to about 1/2 or less immediately before opening the valve, and the suction substance at the moment when the suction channel and the leak channel communicate at the moment when the valve starts to open. A leakage amount changing mechanism was formed to substantially prevent the spillage from the leak hole to the outside through the leak channel.

As described above, if the leak passage is secured to some extent during the pushing stroke, even if the operator inadvertently pushes the operating portion, the operating member is completely moved to the final position.
As long as it is not pushed in, the leak channel communicates with the suction channel, so that strong suction is not performed from the tip of the endoscope. As a result, safety can be ensured.

The function of the leak amount changing mechanism may be changed according to the suction force of the suction device, the type of endoscope, and the like. For example, when the suction force of the suction device is large, the leak amount before the valve is opened may be set to almost 0 or may be set to 0 completely. Further, for example, in the first embodiment shown in FIG. 2, a ring or the like is detachably attached to the leak flow path adjusting member 12a and the outer diameter of the ring is changed to make the leak amount suitable for the endoscope. A changing mechanism may be formed. In the second embodiment shown in FIG. 8, the leak amount can be changed by replacing the first elastic member 39.

[0044]

As described above, according to the present invention, the cylinder forming the chamber communicating with the suction channel of the endoscope, the suction port opened on the side wall of the cylinder, and between the suction port and the suction channel. An operating member for opening and closing the valve body, which is movable by a predetermined stroke in the axial direction of the cylinder, and which opens and closes the valve body and a leak passage communicating with the suction hole and the outside, and the valve body. Through a fluid flow path formed between the outer surface of the operating member and the inner surface of the cylinder, at least before the final position of the pushing stroke of the operating member, the cross-sectional area of the leak flow path than when not pushed. Since a leak amount changing mechanism that completely closes the leak path is formed at the pushing-in final position after the decrease and the predetermined stroke is moved, this leak amount changing mechanism is used. Ri, valve when in the open state, to reduce the cross-sectional area of the fluid flow path than in the closed state. Therefore, while ensuring a sufficient leak flow rate when not suctioning, it is possible to prevent the suctioned matter from sticking to the operator when the suctioning state is achieved by reducing the cross section of the leak flow path. The opening / closing operation of the valve element can be reliably performed.

[Brief description of drawings]

FIG. 1 is a perspective view of an endoscope including a first embodiment.

FIG. 2 is a cross-sectional view showing the suction control device of the first embodiment in a state where a suction operation is not performed.

FIG. 3 is a cross-sectional view showing the first embodiment in a state where a suction operation is being performed.

FIG. 4 is a sectional view showing the first embodiment in a state where a suction operation is performed.

FIG. 5 is an enlarged cross-sectional view showing a non-suction state and a suction state.

FIG. 6 is a cross-sectional view when used without a cover attached.

FIG. 7 is an explanatory view showing how the valve body is removed using the cover.

FIG. 8 is a sectional view showing a suction control device according to a second embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Insertion part 2 ... Grip part 3 ... Operating part 6 ... Suction control device 7 ... Suction channel 8 ... Cylinder 9 ... Inner cylinder 10 ... Valve body 11 ... Slit 12 ... Operation member 12a ... Leak flow path adjusting member 13 ... (Suction ) Operation part 14 ... Lower end part 16 ... Leak channel 17 ... Cover 18 ... Leak hole 21 ... (Suction) mouthpiece part

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[Procedure amendment]

[Submission date] July 13, 1992

[Procedure Amendment 1]

[Document name to be amended] Statement

[Correction target item name] 0004

[Correction method] Change

[Correction content]

Further, as disclosed in Japanese Patent Application No. 3-255551, there is a device in which the cross-sectional area of the leak gap is set as small as possible from the beginning to prevent the suctioned substance from popping out. Since a sufficient leak flow rate cannot be obtained, the inside of the cylinder is always in an excessive negative pressure state, which adversely affects the opening operation of the valve body, or the valve body is not completely closed and is constantly inhaled from the channel. Could be.

[Procedure Amendment 2]

[Document name to be amended] Statement

[Name of item to be corrected] 0023

[Correction method] Change

[Correction content]

Therefore, according to the first embodiment, the valve body 1
Almost at the same time when 0 is released and suction of waste is started,
Since the leak channel 16 is sharply narrowed, dirt is generated in the leak channel 1.
It is possible to effectively prevent jumping out to the outside via 6. In addition, since the leak hole 18 is provided near the bottom of the cover 17, the position where the leak hole 18 is not blocked by the operation of the cover 17
It becomes even jump out and if aspirated liquid, it is possible to prevent the stick to the finger.

[Procedure 3]

[Document name to be amended] Statement

[Name of item to be corrected] 0029

[Correction method] Change

[Correction content]

As shown by the dotted line in FIG. 5, the operating member 1
When a protrusion 27 that engages with the lower end of the inner cylinder 9 is provided on the lower end side of 2 to pull out the operating member 12, the protrusion 2
The structure may be such that 7 is caught on the lower end of the inner cylinder 9 and cannot be disassembled. In other words, in the case of disposable disposable products
In the case of a structure that prevents disassembly and reuse
good. Further, in this embodiment, as shown in FIG. 5, a retaining protrusion 28 (of the cover 17) is provided on the side surface of the cylindrical leak adjusting portion 12a, and a space between the protruding portion 28 and the operating portion 13 is provided. A storage recess of the cover 17 is formed. The top side of the inner cylinder 9 is formed close to the side surface of the cylindrical leak adjusting portion 12a.

[Procedure amendment 4]

[Document name to be corrected] Drawing

[Name of item to be corrected] Figure 5

[Correction method] Change

[Correction content]

[Figure 5]

Claims (1)

[Claims] 1. A cylinder connected to a suction channel of an endoscope, and a suction hole formed in a side wall of the cylinder.
A valve body formed between the suction hole and the suction channel is movable in a predetermined stroke in the axial direction of the cylinder to open and close the valve body and to open and close a leak passage communicating between the suction hole and the outside. In the suction control device comprising an operating member for controlling the fluid flow path formed between the outer surface of the operating member and the inner surface of the cylinder via the valve body, in the initial stage of the pushing stroke of the operating member, The suction control device is characterized in that a cross-sectional area of the leak passage is reduced at least as compared with that when not pushed, and a leak amount changing mechanism for completely closing the leak passage at a pushing final position moved by the predetermined stroke is formed.