JP2008228990A - Suction device of endoscope - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To adjust a direction of a piping joint of a suction valve extended outside of the main body operational portion as desired. <P>SOLUTION: An insert-fitting part 36a on the lower side of a guide member 36 constituting a suction valve unit 49 is fitted into a valve casing 32 connected to a casing 31 by a bayonet mechanism and is insert-fitted in a second chamber 34 to be in a close fitting state. A rotor 39a of the piping joint 39 is rotatably fitted in a supporting cylindrical part 36c in the upper position. A joint pipe arrangement 39b, to which a suction pipe arrangement 27 is connected from the rotor 39a, is extended. A plunger 37 connected to the guide member 36 through an elastic cylindrical member 46 is inserted into the guide member 36. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a suction device that is provided in an endoscope and constitutes an endoscope suction mechanism for sucking and removing internal dirt and body fluid.

  A suction mechanism is provided in order to improve the observation field of view when performing examinations and treatments in the body of the subject using an endoscope, and the body is filled with filth and blood and other body fluids. When the observation visual field cannot be obtained, they are configured so that they can be removed by suction. Usually, a treatment tool insertion channel for inserting a treatment tool such as forceps is used as the suction path, but an independent suction passage may be provided in the insertion portion. In any case, a suction device composed of a suction valve and its operating member is attached to the main body operation section, and a suction source side passage connected to the suction source device is connected to this suction device, and is necessary. Sometimes it is possible to perform as much suction as necessary by manually operating the suction device.

  By the way, when the above-described suction operation is performed, the suction path, that is, the suction passage including the treatment instrument insertion channel and the inside of the suction valve, and further, the inner surface of the suction source side passage are soiled. Therefore, when reusing this endoscope, the suction path must be cleaned and disinfected in advance. The treatment instrument insertion channel and the suction passage and the suction source side passage connected to the treatment tool insertion channel are both conduits, and can be cleaned relatively easily. However, the suction valve is a mechanism that allows the suction passage and the suction source side passage to communicate with each other, and therefore has a complicated passage structure. Have difficulty.

  Considering the above points, for example, Patent Document 1 discloses a suction device including a suction valve having a configuration with good cleaning properties. Then, with reference to FIG.7 and FIG.8, the structure of the suction device shown by this patent document 1 is demonstrated. In the figure, reference numeral 1 denotes a casing constituting a main body operation unit of an endoscope, and a valve holder 2 of a suction device is fixedly attached to the casing 1. The lower end portion of the valve holder 2 is a suction port 4 to which a suction passage 3 leading to a suction port formed at the tip of the insertion portion is connected.

  A suction valve 5 is detachably mounted in the valve holder 2. The suction valve 5 includes a sleeve 6 and a plunger 8 having a valve portion 7. The sleeve 6 is detachably mounted in the valve holder 2 and protrudes from the valve holder 2 by a predetermined length. And the pipe connection part 9 is extended and provided in the protrusion part from the valve holder 2 of the sleeve 6. FIG. Therefore, the suction pipe from the suction source device is detachably connected to the pipe connection portion 9 outside the housing 1 in the main body operation portion of the endoscope.

  An annular ridge 10 is provided at an intermediate position in the sleeve 6 of the plunger 8, and the annular ridge 10 is slidably guided on the inner surface of the sleeve 6. Further, the valve portion 7 provided in the plunger 8 is constituted by a lower end portion of the plunger 8 having a substantially conical shape, and the valve portion 7 protrudes from the outer peripheral portion of the plunger 8. An elastic sheet 11 formed in an approximately cylindrical shape with an elastic member such as rubber is attached to the lower end portion of the sleeve 6, and the valve portion 7 provided on the plunger 8 is moved by the vertical movement of the plunger 8. 11 is in contact with and away from the inner surface.

  The annular ridge 10 of the plunger 8 is partially formed with a notch 10 a, and a communication path 10 b is provided at a position above the valve portion 7. A flange portion 6a is formed at the upper end portion of the sleeve 6, and an elastic cylindrical member 12 made of rubber having a spring property is mounted between the flange portion 6a and the upper position of the plunger 8. In addition, an air opening 13 is formed in the peripheral body portion of the elastic cylindrical member 12. Further, a portion of the sleeve 6 inside the flange portion 6a projects to form a seating portion 6b with which the elastic cylindrical member 12 abuts.

  The plunger 8 protrudes from the housing 1 of the main body operation part, and this protrusion part is the operation part 14 of the suction valve 5 and can be pushed by the finger of the hand holding the main body operation part. And the elastic cylinder member 12 connected with this plunger 8 comprises a return means, and after pushing the plunger 8 as mentioned above, if pushing force is cancelled | released, with the elastic restoring force of the elastic cylinder member 12, The plunger 8 is restored to the original protruding state.

  Although the operation unit 14 is operated by fingers, the operation force at the time of this operation is reliably transmitted in the axial direction of the plunger 8. Further, a step portion 1a is formed in the casing 1, and the pipe connecting portion 9 is extended to the portion of the step portion 1a to restrict the position thereof.

  In the suction device of Patent Document 1 configured as described above, in a normal state, that is, in a non-operation state, as shown in FIG. 1 protrudes. This state is a non-operating state of the suction valve. That is, the plunger 8 is in a position protruding by the action of the elastic cylinder member 12, and at this time, the valve portion 7 is in contact with the elastic sheet 11. As a result, the suction port 4 formed in the valve holder 2 is cut off from the pipe connection portion 9 to be closed, and the pipe connection portion 9 is notched 10a and the atmosphere opening port 13 formed in the annular protrusion 10 of the plunger 8. It communicates with the atmosphere through. As a result, no negative pressure suction force is generated in the suction passage 3, and the pipe connection portion 9 communicates with the atmosphere. As a result, the suction source device is held in an unloaded state.

  Therefore, when the operation unit 14 pushes the plunger 8 against the elastic cylinder member 12, the atmosphere opening 13 is closed and the pipe connection unit 9 is shut off from the atmosphere. Further, when the plunger 8 is pushed, the valve portion 7 provided on the plunger 8 slides along the elastic sheet 11 functioning as the other valve portion corresponding to the plunger 8 and is released from the elastic sheet 11 to open the valve. Therefore, as a result of the suction port 4 provided in the valve holder 2 communicating with the pipe connection portion 9, a negative pressure suction force from the suction source device can be applied to the suction passage 3.

In this way, the suction valve comprising the plunger 8 provided with the valve portion 7 for connecting / blocking the suction passage 3 to / from the pipe connecting portion 9 and the sleeve 6 provided with the elastic member 11 where the pipe connecting portion 9 and the valve portion 7 contact and separate is provided. Since the endoscope can be attached to and detached from the valve holder 2, when the endoscope is used clinically, when the endoscope is cleaned and disinfected, the entire suction valve 5 constituting the suction device is attached to the valve holder 2. Can be separated and removed. Therefore, the suction valve 5 can be easily cleaned, and the suction valve 5 may be discarded after each use. On the other hand, since the inside of the valve holder 2 has a substantially cylindrical shape with a reduced diameter at the bottom, it can be easily and completely cleaned and disinfected by inserting a brush or the like. In addition, since the suction pipe is detachably connected to the pipe connection portion 9 outside the housing 1, the suction pipe is detached from the pipe connection portion 9 and discarded, or is completely cleaned and disinfected. It can be reused after being done.
Japanese Patent No. 3476959

  As described above, the pipe connection portion 9 is disposed outside the casing 1 constituting the main body operation portion of the endoscope, and the suction pipe is connected to the pipe connection portion 9. The housing 1 is for an operator to operate the endoscope by grasping it by hand. Accordingly, depending on how the operator grasps the main body operation unit, the posture, and the manner of treatment, the suction pipe may become an obstacle to the operation of the endoscope.

  The present invention has been made in view of the above points, and an object of the present invention is to adjust the direction of the pipe connection portion of the suction valve extending outside the main body operation portion as desired. There is in doing so.

  In order to achieve the above-described object, the present invention provides a suction passage from a suction opening provided at the distal end of the insertion portion and a suction source side passage from the suction source device, which is provided in the main body operation portion of the endoscope. A valve casing that is mounted on the main body operation unit and connected to the suction passage and is detachably mounted in the valve casing to connect and disconnect the suction passage and the suction source side passage. An endoscope suction device comprising a suction valve unit that shuts off, wherein the suction valve unit includes a guide member fitted to the valve casing, a plunger guided by the guide member, and the suction A pipe connecting portion to which a source side passage is connected, and a valve portion for connecting / blocking the suction source side passage and the suction passage is formed between the valve casing and the plunger. Cage The pipe connecting portion with respect to the guide member, in which as its characterized in that a structure for rotatably coupled about its axis.

  As described above, the pipe connection portion is rotatable with respect to the guide member. However, when operating the suction valve unit, it is necessary to prevent the portion where the operating force is applied from shifting in the rotation direction. . In addition, in the case of intentionally removing the pipe connection part from the guide member, the pipe connection part must not be unintentionally disconnected. For this purpose, for example, a rotating body in which a pipe connecting portion is fitted to a guide member via a seal member, and a connecting pipe connected to the rotating body, the rotating body is connected to a plunger via an elastic member. The rotating body is assembled with the guide member, and the plunger is assembled so as to be inserted into the guide member. The outer peripheral side of the guide member is in sliding contact with the inner peripheral surface of the rotating body, and the inner peripheral surface of the guide member is in sliding contact with the outer peripheral surface of the plunger.

  The pipe connection part of the suction device extending outside the main body operation part can be displaced in a desired direction, and the operability of the endoscope operation performed by holding the main body operation part is improved.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. First, FIG. 1 shows a schematic configuration of an endoscope suction mechanism. In the figure, the endoscope 20 is roughly composed of a main body operation unit 21, an insertion unit 22, and a universal cord 23. The insertion section 22 is provided with a treatment instrument insertion channel 24 for inserting a treatment instrument such as forceps. The treatment instrument insertion channel 24 opens as a suction port at the distal end portion of the insertion section 22. The end is opened in the main body operation unit 21 as a treatment instrument introducing unit 24a. The treatment instrument introduction section 24a is sealed with a forceps plug 25 except when the treatment instrument is inserted.

  The treatment instrument insertion channel 24 described above is also used as a suction path, and the treatment instrument insertion channel 24 is branched into the suction passage 26 in the main body operation unit 21. The suction passage 26 is connected to the suction device 30. A suction pipe 27 constituting a suction source side flow path is connected to the suction apparatus 30, and the other end of the suction pipe 27 is connected to a suction source apparatus 28. Accordingly, the suction device 30 is for performing switching control of whether the suction pipe 27 communicates with the atmosphere or is connected to the suction passage 26. This switching control is performed by the finger of the hand holding the main body operation unit 21. Can be done with.

  2 to 6 show a specific configuration of the suction device 30. FIG. First, in FIGS. 2 and 3, reference numeral 31 denotes a casing of the main body operation unit 21, and the casing 31 is fitted with a valve casing 32 of the suction device 30. The valve casing 32 is attached to the casing 31. It is fixedly provided. A suction passage 26 is provided at the lower end portion of the valve casing 32 (in the following description, the inner side of the casing 31 is defined as the lower side or the lower side, and the side protruding from the casing 31 is defined as the upper side or the upper side). It is connected. A stepped portion protruding inward is formed on the inner surface of the valve casing 32. This step constitutes a sliding surface portion 32a for opening and closing a flow path having a predetermined length in the axial direction, and the valve casing 32 is located below the sliding surface portion 32a by a valve portion 40 described later. A first chamber 33 and an upper second chamber 34 are partitioned. In addition, a transition portion toward the first chamber 33 in the sliding surface portion 32a is a tapered portion 32b. Reference numeral 35 denotes a seal member interposed between the outer peripheral surface of the valve casing 32 and the housing 31.

  A guide member 36 and a plunger 37 are mounted in the valve casing 32. The lower part of the guide member 36 is an insertion portion 36 a that is inserted into the second chamber 34 in a substantially tight fit state in the valve casing 32. And the flange part 36b is formed in the upper position of the insertion part 36a of this guide member 36, Furthermore, the upper part becomes the support cylinder part 36c.

  The insertion portion 36a of the guide member 36 is inserted into the valve casing 32 by a length sufficient to ensure concentricity in the axial direction. An elastic seal member 38 is interposed between the insertion portion 36 a of the guide member 36 and the valve casing 32. A plunger 37 is inserted into the guide member 36, and the plunger 37 is in sliding contact with the inner peripheral surface of the flange portion 36 b from the insertion portion 36 a of the guide member 36. Guided straight in the axial direction.

  The plunger 37 inserted and guided by the guide member 36 is a main body shaft 37a that slides on the inner peripheral surface of the insertion portion 36a at the portion of the insertion portion 36a of the guide member 36, and this main body shaft 37a. An extension portion 37b is continuously provided at the lower end portion of this, and the extension portion 37b is once reduced in diameter, and the lower portion thereof is further increased in diameter. An annular mounting groove 37c is formed. A valve portion 40 made of a ring-shaped elastic member is attached to the mounting groove 37c. The valve portion 40 is in sliding contact with a sliding surface portion 32 a provided in the valve casing 32. The outer diameter dimension of the valve portion 40 is larger than the inner diameter of the sliding surface portion 32a in the free state. Therefore, when the valve portion 40 rides on the sliding surface portion 32a, the first chamber 33 and the second chamber 34 are provided. Communication with is interrupted. In order to ensure the airtightness at this time, the valve portion 40 needs to be in contact with the sliding surface portion 32a over the entire circumference. Since the alignment is accurately performed with respect to 32, airtightness is reliably ensured.

  A pipe connection part 39 is fitted into the support cylinder part 36 c of the guide member 36. The pipe connection part 39 is composed of a rotating body 39a fitted to the support cylinder part 36c and a connection pipe 39b extended from the rotating body 39a. The suction pipe 27 shown in FIG. 1 is detachably connected to the connection pipe 39b, and the suction pipe 27 is connected to the suction source device 28.

  The inner diameter of the support cylinder portion 36c of the guide member 36 is larger than the inner diameters of the insertion fitting portion 36a and the flange portion 36b. Therefore, the gap between the support cylinder portion 36c of the guide member 36 and the plunger 37 is as shown in FIG. An annular gap as shown is formed. Further, a communication passage 41 is formed in the main body shaft 37 by a predetermined length in the axial direction, and a gap between the support cylinder portion 36c and the plunger 37 is an annular passage 42. Thus, when the plunger 37 is lowered, a flow path is formed from the second chamber 34 to the communication path 41 and the annular path 42.

  A plurality of through holes 43 are formed in the support cylinder portion 36c, and an annular recess 44 is formed on the inner peripheral surface of the rotating body 39a constituting the pipe connecting portion 39. The annular recess 44 is always in communication. The connection pipe 39b opens into the annular recess 44. Therefore, the connection pipe 39 b is always in communication with the annular passage 42 formed on the inner surface side of the support cylinder portion 36 c via the annular recess 44 and the through hole 43. Seal members 45, 45 are provided between the rotating body 39a and the support cylinder portion 36c at upper and lower portions where the through holes 43 are formed.

  The upper portion of the plunger 37 protrudes from the upper end portion of the guide member 36 to form a protruding end portion 37d having a large diameter, and this portion is a push operation portion of the suction device 30. A canopy portion 46a of the elastic cylindrical member 46 is connected to the protruding end portion 37d. The elastic cylinder member 46 has a skirt portion 46 b, and the skirt portion 46 b is connected to the upper position of the guide member 36. The skirt portion 46b of the elastic cylinder member 46 can be compressed, and when the force in the compression direction is released, the elastic skirt part 46b is elastically restored to a cylindrical shape. Further, when the skirt portion 46b is compressed, the skirt portion 46b always bends outward with the fold line 47 as a boundary. Furthermore, an opening 48 communicating with the atmosphere is formed in the skirt portion 46b of the elastic cylindrical member 46.

  As described above, the suction valve unit 49 includes the guide member 36, the plunger 37, and the pipe connection portion 39, and the pushing operation member including the elastic cylinder member 46 attached to the protruding end portion 37 d of the plunger 37, and the suction device. 30 includes a valve casing 32 and a suction valve unit 49. The valve casing 32 is fixedly attached to the housing 31, and the suction valve unit 49 is assembled so that the guide member 36 is inserted into the valve casing 32. And in order to fix this suction valve unit 49 in the state connected with the valve casing 32, the bayonet nail | claw 50 is provided in the inner surface of the upper end vicinity of the valve casing 32 so that FIG. Further, as shown in FIG. 6, a bayonet groove 51 is formed on the outer peripheral surface of the insertion portion 36a of the guide member 36 in the suction valve unit 49 at a position near the boundary with the flange portion 36b. Accordingly, the suction valve unit 49 is connected to the valve casing 32 by fitting the suction valve unit 49 to the valve casing 32 and rotating it by a predetermined angle at a position where the bayonet groove 51 does not interfere with the bayonet claw 50. It becomes fixed to the state.

  In the suction device 30 assembled in the main body operation unit 21 of the endoscope 20 as described above, the plunger 37 is normally held in a state where the plunger 37 is pulled up along the guide member 36 as shown in FIG. . Therefore, the opening 48 provided in the elastic cylinder member 46 is opened to the outside, and the connection pipe 39b constituting the suction source side passage is formed between the outer peripheral surface of the main body shaft 37a of the plunger 37 and the inner peripheral surface of the guide member 36. It communicates with the atmosphere from the opening 48 via the inside of the annular passage 42 and the elastic cylindrical member 46 formed therebetween, and no negative pressure substantially acts on the connecting pipe 39b.

  On the other hand, the valve portion 40 provided on the plunger 37 is in contact with the sliding surface portion 32 a of the valve casing 32. Further, the guide member 36 is in surface contact with the valve casing 32 by a predetermined length in the axial direction, and the plunger 37 is in surface contact with the guide member 36 by a predetermined length in the axial direction. is doing. Therefore, the valve casing 32, the guide member 36, and the plunger 37 are reliably concentric. Further, due to the difference in diameter between the outer diameter of the valve portion 40 and the inner diameter of the sliding surface portion 32a, the valve portion 40 made of an elastic member is bent, and airtightness is ensured during that time. As a result, in the valve casing 32, the first chamber 33 and the second chamber 34 are blocked, and the suction passage 26 and the connection pipe 39b do not communicate with each other.

  As a result, the negative pressure suction force does not act on the suction passage 26 and the treatment instrument insertion channel 24. In the flow path between the second chamber 34 and the connection pipe 39b, the outer peripheral surface of the main body shaft 37a of the plunger 37 and the inner peripheral surface of the guide member 36 are substantially in surface contact. Is not a particularly airtight structure, and the annular passage 42 and the second chamber 34 may communicate with each other. Therefore, the communication path 41 formed in the main body shaft 37a of the plunger 37 may extend to the lower end portion of the main body shaft 37a. Thus, normally, the suction passage 26 and the suction pipe 27 are blocked by the suction device 30 and the valve portion 40 is held in the closed state. Accordingly, in this state, the treatment instrument insertion channel 24 is in a state where an appropriate treatment can be performed by inserting a treatment instrument such as forceps through its original function.

  In order to perform suction from the body, the protruding portion 37d of the plunger 37 is pushed with fingers. As a result, the plunger 37 slides along the guide member 36 provided in the valve casing 32. As a result, the skirt portion 46b of the elastic cylindrical member 46 is positioned at the broken line 47 as shown in FIG. The canopy 46a comes into contact with the upper end of the guide member 36. As a result, communication between the connection pipe 39b of the pipe connection portion 39 constituting the suction pipe 27 and the atmosphere is blocked.

  Further, when the plunger 37 is lowered, the valve portion 40 mounted in the mounting groove 37c provided in the extension portion 37b of the plunger 37 slides along the sliding surface portion 32a of the valve casing 32, and this sliding surface portion. Leave 32a. As a result, the first chamber 33 to which the suction passage 26 is connected is brought into a valve open state in which the first chamber 33 communicates with the second chamber 34 communicating with the suction pipe 27, and a negative pressure suction force is applied to the suction passage 26. Thus, filth, body fluid and the like are sucked from the treatment instrument insertion channel 24. At this time, an elastic seal member 38 is interposed between the valve casing 32 and the guide member 36, and the space between the valve casing 32 and the guide member 36 is airtight, and the opening 48 is also closed as described above. No suction occurs, and the negative pressure suction force in the suction passage 26 does not decrease.

  In order to stop the suction, the pressing force applied to the protruding end portion 37d of the plunger 37 is released. Since the elastic cylinder member 46 has an elastic restoring force, the plunger 37 is pulled up by the elastic restoring force. As a result, the valve portion 40 mounted in the mounting groove 37c of the extension portion 37b of the plunger 37 rides on the sliding surface portion 32a from the tapered portion 32b of the valve casing 32, and the valve portion 40 comes into contact with the sliding surface portion 32a. Thus, the valve returns to the closed state in which the communication between the first chamber 33 and the second chamber 34 is blocked. Here, since the valve casing 32, the guide member 36, and the plunger 37 are concentric, the valve portion 40 provided on the plunger 37 smoothly rides on the sliding surface portion 32a from the tapered portion 32b of the valve casing 32 and closes. It becomes a valve state.

  The operation of the endoscope 20 is performed by the operator holding the main body operation unit 21. A suction pipe 27 connected to the pipe connecting part 39 in the suction valve unit 49 is extended from the main body operation part 21 together with the universal cord 23. Depending on the extending direction of the suction pipe 27, the operator may interfere with the operation performed by grasping the main body operation unit 21, and the operability may be deteriorated. For this reason, the pipe connection part 39 to which the suction pipe 27 is connected is rotatable around the axis of the guide member 36. That is, the elastic cylinder member 46 is integrally connected to the rotating body 39 a in the pipe connection portion 39, and the plunger 37 is connected to the elastic cylinder member 46. The rotating body 39a is fitted on the outer peripheral surface of the support cylinder portion 36c of the guide member 36, and the fitting portion is slidable. The plunger 37 is slidably inserted into the insertion portion 36 a of the guide member 36. Further, the valve portion 40 connected to the end portion of the plunger 37 is slidable with respect to the sliding surface portion 32a of the valve casing 32, and the sliding can be performed not only in the axial direction but also in rotation. It can slide even in the direction.

  Therefore, by rotating the connection pipe 39b in the pipe connection portion 39 around the axis of the guide member 36, it can be rotated in either the left or right direction, and the suction pipe 27 can be directed in a desired direction. Here, the seal member 45 is interposed between the rotating body 39a and the support cylinder portion 36c of the guide member 36. Therefore, when the connection pipe 39b is rotated, a considerable resistance is generated. Rather, it is desirable that there is some resistance because the connecting pipe 39b can be stably held at the position where the direction of the connecting pipe 39b is adjusted. Further, when performing the suction operation, the elastic cylinder portion 46 and the plunger 37 are operated to be pushed in. At this time, the plunger 37 can be surely pushed in, and the force is absorbed in the rotation direction during the operation. There is nothing, and the stability of the operation can be achieved.

  In addition, when the suction valve unit 49 is operated to perform the suction operation, the plunger 37 and the elastic cylinder portion 46 are pushed in. At this time, the rotating body 39a is pressed against the flange portion 36b of the guide member 36. become. In addition, a guide member 36 is bayonet-coupled to the valve casing 32 fixed to the housing 31, and a plunger 37 is inserted into the inner peripheral side of the guide member 36. The rotating body 39 a of the connected pipe connection portion 39 is fitted on the outer peripheral side of the guide member 36. Accordingly, unless the plunger 37 and the pipe connecting portion 39 are intentionally pulled out in the axial direction of the guide member 36, for example, even if an external force in the lifting direction acts on the connecting pipe 39b or the suction pipe 27 connected thereto, the plunger 37 And there is no possibility that the pipe connection part 39 will detach | leave, and it is hold | maintained stably in a connection state.

  If suction is performed from inside the body, the suction path is fouled, and the suction path must be cleaned and disinfected after use. For this purpose, the bayonet claw 50 and the bayonet groove 51 are disengaged, and the suction valve unit 49 is removed from the valve casing 32 as shown in FIGS. As shown in FIG. 5, the second chamber 34 in the valve casing 32 is formed of a large-diameter space, and is reduced in diameter by the sliding surface portion 32a, and then is wider than the inside of the sliding surface portion 32a. However, since the inside of the valve casing 32 is in a straight traveling state, it can be easily and reliably cleaned and disinfected by inserting a brush or the like. In addition, each member constituting the suction valve unit 49 can be cleaned and disinfected independently and reused, but can be discarded after use and replaced with a new suction valve unit 49. Further, the suction pipe 27 can be cleaned and sterilized and reused, but it is desirable to discard it after use.

It is explanatory drawing which shows the structure of the suction mechanism of the endoscope which shows one Embodiment of this invention. It is sectional drawing which shows the structure of the suction device in the suction mechanism of FIG. It is XX sectional drawing of FIG. It is sectional drawing of the suction device which shows the operation state different from FIG. It is sectional drawing which decomposes | disassembles and shows a suction device. It is a front view of the assembly of the guide member and plunger which comprise a suction device. It is sectional drawing of the suction device by a prior art. It is sectional drawing similar to FIG. 7 which shows a suction action state.

Explanation of symbols

DESCRIPTION OF SYMBOLS 20 Endoscope 21 Main body operation part 22 Insertion part 24 Treatment tool penetration channel 26 Suction passage 27 Suction piping 28 Suction source apparatus 30 Suction apparatus 31 Housing | casing 32 Valve casing 32a Sliding surface part 33 1st chamber 34 2nd chamber 36 Guide member 36a Insertion part 36b Flange part 36c Support cylinder part 37 Plunger 37a Body shaft 37c Mounting groove 39 Pipe connection part 39a Rotating body 39b Connection pipe 40 Valve part 46 Elastic cylinder part 49 Suction valve unit 50 Bionet claw 51 Bionet groove

Claims (2)

The main body operation unit is provided in the main body operation unit of the endoscope and communicates and blocks between a suction passage from a suction port opened at a distal end of the insertion unit and a suction source side passage from the suction source device. An endoscope comprising a valve casing attached to the suction passage and connected to the suction passage, and a suction valve unit detachably attached to the valve casing and connecting / blocking the suction passage and the suction source side passage. In the suction device of
The suction valve unit includes a guide member fitted to the valve casing, a plunger guided by the guide member, and a pipe connection portion to which the suction source side passage is connected.
Between the valve casing and the plunger, a valve portion for connecting and blocking the suction source side passage and the suction passage is formed,
2. The endoscope suction apparatus according to claim 1, wherein the pipe connecting portion is configured to be connected to the guide member so as to be rotatable about its axis. The pipe connection portion includes a rotating body fitted to the guide member via a seal member, and a connection pipe connected to the rotating body, and the rotating body is connected to the plunger via an elastic member. 2. The endoscope suction device according to claim 1, wherein the rotating body is fitted to the guide member, and the plunger is assembled to be fitted to the guide member.

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